Immuno-oncology

Results from the latest survey by the National Comprehensive Cancer Network (NCCN) showed that numerous critical systemic anticancer therapies, primarily generic drugs, are currently in shortage.

Nearly 90% of the 28 NCCN member centers who responded to the survey, conducted between May 28 and June 11, said they were experiencing a shortage of at least one drug.

“Many drugs that are currently in shortage form the backbones of effective multiagent regimens across both curative and palliative treatment settings,” NCCN’s CEO Crystal S. Denlinger, MD, said in an interview.

The good news is that carboplatin and cisplatin shortages have fallen dramatically since 2023. At the peak of the shortage in 2023, 93% of centers surveyed reported experiencing a shortage of carboplatin and 70% were experiencing a shortage of cisplatin, whereas in 2024, only 11% reported a carboplatin shortage and 7% reported a cisplatin shortage.

“Thankfully, the shortages for carboplatin and cisplatin are mostly resolved at this time,” Dr. Denlinger said.

However, all three NCCN surveys conducted in the past year, including the most recent one, have found shortages of various chemotherapies and supportive care medications, which suggests this is an ongoing issue affecting a significant spectrum of generic drugs.

“The acute crisis associated with the shortage of carboplatin and cisplatin was a singular event that brought the issue into the national spotlight,” but it’s “important to note that the current broad drug shortages found on this survey are not new,” said Dr. Denlinger.

In the latest survey, 89% of NCCN centers continue to report shortages of one or more drugs, and 75% said they are experiencing shortages of two or more drugs.

Overall, 57% of centers are short on vinblastine, 46% are short on etoposide, and 43% are short on topotecan. Other common chemotherapy and supportive care agents in short supply include dacarbazine (18% of centers) as well as 5-fluorouracil (5-FU) and methotrexate (14% of centers).

In 2023, however, shortages of methotrexate and 5-FU were worse, with 67% of centers reporting shortages of methotrexate and 26% of 5-FU.

In the current survey, 75% of NCCN centers also noted they were aware of drug shortages within community practices in their area, and more than one in four centers reported treatment delays requiring additional prior authorization.

Cancer drug shortages impact not only routine treatments but also clinical trials. The recent survey found that 43% of respondents said drug shortages disrupted clinical trials at their center. The biggest issues centers flagged included greater administrative burdens, lower patient enrollment, and fewer open trials.

How are centers dealing with ongoing supply issues?

Top mitigation strategies include reducing waste, limiting use of current stock, and adjusting the timing and dosage within evidence-based ranges.

“The current situation underscores the need for sustainable, long-term solutions that ensure a stable supply of high-quality cancer medications,” Alyssa Schatz, MSW, NCCN senior director of policy and advocacy, said in a news release.

Three-quarters (75%) of survey respondents said they would like to see economic incentives put in place to encourage the high-quality manufacturing of medications, especially generic versions that are often in short supply. Nearly two-thirds (64%) cited a need for a broader buffer stock payment, and the same percentage would like to see more information on user experiences with various generic suppliers to help hospitals contract with those engaging in high-quality practices.

The NCCN also continues to work with federal regulators, agencies, and lawmakers to implement long-term solutions to cancer drug shortages.

“The federal government has a key role to play in addressing this issue,” Ms. Schatz said. “Establishing economic incentives, such as tax breaks or manufacturing grants for generic drugmakers, will help support a robust and resilient supply chain — ultimately safeguarding care for people with cancer across the country.”

A version of this article appeared on Medscape.com.

Results from the latest survey by the National Comprehensive Cancer Network (NCCN) showed that numerous critical systemic anticancer therapies, primarily generic drugs, are currently in shortage.

Nearly 90% of the 28 NCCN member centers who responded to the survey, conducted between May 28 and June 11, said they were experiencing a shortage of at least one drug.

“Many drugs that are currently in shortage form the backbones of effective multiagent regimens across both curative and palliative treatment settings,” NCCN’s CEO Crystal S. Denlinger, MD, said in an interview.

The good news is that carboplatin and cisplatin shortages have fallen dramatically since 2023. At the peak of the shortage in 2023, 93% of centers surveyed reported experiencing a shortage of carboplatin and 70% were experiencing a shortage of cisplatin, whereas in 2024, only 11% reported a carboplatin shortage and 7% reported a cisplatin shortage.

“Thankfully, the shortages for carboplatin and cisplatin are mostly resolved at this time,” Dr. Denlinger said.

However, all three NCCN surveys conducted in the past year, including the most recent one, have found shortages of various chemotherapies and supportive care medications, which suggests this is an ongoing issue affecting a significant spectrum of generic drugs.

“The acute crisis associated with the shortage of carboplatin and cisplatin was a singular event that brought the issue into the national spotlight,” but it’s “important to note that the current broad drug shortages found on this survey are not new,” said Dr. Denlinger.

In the latest survey, 89% of NCCN centers continue to report shortages of one or more drugs, and 75% said they are experiencing shortages of two or more drugs.

Overall, 57% of centers are short on vinblastine, 46% are short on etoposide, and 43% are short on topotecan. Other common chemotherapy and supportive care agents in short supply include dacarbazine (18% of centers) as well as 5-fluorouracil (5-FU) and methotrexate (14% of centers).

In 2023, however, shortages of methotrexate and 5-FU were worse, with 67% of centers reporting shortages of methotrexate and 26% of 5-FU.

In the current survey, 75% of NCCN centers also noted they were aware of drug shortages within community practices in their area, and more than one in four centers reported treatment delays requiring additional prior authorization.

Cancer drug shortages impact not only routine treatments but also clinical trials. The recent survey found that 43% of respondents said drug shortages disrupted clinical trials at their center. The biggest issues centers flagged included greater administrative burdens, lower patient enrollment, and fewer open trials.

How are centers dealing with ongoing supply issues?

Top mitigation strategies include reducing waste, limiting use of current stock, and adjusting the timing and dosage within evidence-based ranges.

“The current situation underscores the need for sustainable, long-term solutions that ensure a stable supply of high-quality cancer medications,” Alyssa Schatz, MSW, NCCN senior director of policy and advocacy, said in a news release.

Three-quarters (75%) of survey respondents said they would like to see economic incentives put in place to encourage the high-quality manufacturing of medications, especially generic versions that are often in short supply. Nearly two-thirds (64%) cited a need for a broader buffer stock payment, and the same percentage would like to see more information on user experiences with various generic suppliers to help hospitals contract with those engaging in high-quality practices.

The NCCN also continues to work with federal regulators, agencies, and lawmakers to implement long-term solutions to cancer drug shortages.

“The federal government has a key role to play in addressing this issue,” Ms. Schatz said. “Establishing economic incentives, such as tax breaks or manufacturing grants for generic drugmakers, will help support a robust and resilient supply chain — ultimately safeguarding care for people with cancer across the country.”

A version of this article appeared on Medscape.com.

Results from the latest survey by the National Comprehensive Cancer Network (NCCN) showed that numerous critical systemic anticancer therapies, primarily generic drugs, are currently in shortage.

Nearly 90% of the 28 NCCN member centers who responded to the survey, conducted between May 28 and June 11, said they were experiencing a shortage of at least one drug.

“Many drugs that are currently in shortage form the backbones of effective multiagent regimens across both curative and palliative treatment settings,” NCCN’s CEO Crystal S. Denlinger, MD, said in an interview.

The good news is that carboplatin and cisplatin shortages have fallen dramatically since 2023. At the peak of the shortage in 2023, 93% of centers surveyed reported experiencing a shortage of carboplatin and 70% were experiencing a shortage of cisplatin, whereas in 2024, only 11% reported a carboplatin shortage and 7% reported a cisplatin shortage.

“Thankfully, the shortages for carboplatin and cisplatin are mostly resolved at this time,” Dr. Denlinger said.

However, all three NCCN surveys conducted in the past year, including the most recent one, have found shortages of various chemotherapies and supportive care medications, which suggests this is an ongoing issue affecting a significant spectrum of generic drugs.

“The acute crisis associated with the shortage of carboplatin and cisplatin was a singular event that brought the issue into the national spotlight,” but it’s “important to note that the current broad drug shortages found on this survey are not new,” said Dr. Denlinger.

In the latest survey, 89% of NCCN centers continue to report shortages of one or more drugs, and 75% said they are experiencing shortages of two or more drugs.

Overall, 57% of centers are short on vinblastine, 46% are short on etoposide, and 43% are short on topotecan. Other common chemotherapy and supportive care agents in short supply include dacarbazine (18% of centers) as well as 5-fluorouracil (5-FU) and methotrexate (14% of centers).

In 2023, however, shortages of methotrexate and 5-FU were worse, with 67% of centers reporting shortages of methotrexate and 26% of 5-FU.

In the current survey, 75% of NCCN centers also noted they were aware of drug shortages within community practices in their area, and more than one in four centers reported treatment delays requiring additional prior authorization.

Cancer drug shortages impact not only routine treatments but also clinical trials. The recent survey found that 43% of respondents said drug shortages disrupted clinical trials at their center. The biggest issues centers flagged included greater administrative burdens, lower patient enrollment, and fewer open trials.

How are centers dealing with ongoing supply issues?

Top mitigation strategies include reducing waste, limiting use of current stock, and adjusting the timing and dosage within evidence-based ranges.

“The current situation underscores the need for sustainable, long-term solutions that ensure a stable supply of high-quality cancer medications,” Alyssa Schatz, MSW, NCCN senior director of policy and advocacy, said in a news release.

Three-quarters (75%) of survey respondents said they would like to see economic incentives put in place to encourage the high-quality manufacturing of medications, especially generic versions that are often in short supply. Nearly two-thirds (64%) cited a need for a broader buffer stock payment, and the same percentage would like to see more information on user experiences with various generic suppliers to help hospitals contract with those engaging in high-quality practices.

The NCCN also continues to work with federal regulators, agencies, and lawmakers to implement long-term solutions to cancer drug shortages.

“The federal government has a key role to play in addressing this issue,” Ms. Schatz said. “Establishing economic incentives, such as tax breaks or manufacturing grants for generic drugmakers, will help support a robust and resilient supply chain — ultimately safeguarding care for people with cancer across the country.”

A version of this article appeared on Medscape.com.

The MUC-1 vaccine tecemotide plus standard neoadjuvant systemic therapy was shown to notably improve distant relapse-free survival and overall survival rates in breast cancer patients, in a new study.

“This is the first successful study of a breast cancer vaccine to date,” Christian F. Singer, MD, said during an interview. Dr. Singer, the lead author of the new study, presented the results during a poster session at the 2024 annual meeting of the American Society of Clinical Oncology (ASCO).

Previously known as both liposomal BLP25 and Stimuvax, tecemotide is an antigen-specific immunotherapy that targets the cancer therapy–resistant MUC-1 glycoprotein, which is overexpressed in over 90% of breast cancers. Tecemotide also has been shown to moderately improve overall survival rates in non–small cell lung cancer.

“We are not at all surprised by the results of this study in breast cancer,” Gregory T. Wurz, PhD, senior researcher at RCU Labs in Lincoln, California, said in an interview.

Dr. Wurz is coauthor of several studies on peptide vaccines, including a mouse model study of human MUC-1–expressing mammary tumors showing that tecemotide combined with letrozole had additive antitumor activity. Another paper he coauthored showed that ospemifene enhanced the immune response to tecemotide in both tumor-bearing and non–tumor-bearing mice. These findings, combined with other research, led to the creation of a patented method of combining therapies to enhance the efficacy of immunotherapy in the treatment of cancer and infectious diseases. Dr. Wurz was not involved in the new research that Dr. Singer presented at ASCO.
 

Study Methods and Results

Dr. Singer, head of obstetrics and gynecology at the Medical University of Vienna, Vienna, Austria, and coauthors randomized 400 patients with HER2-negative early breast cancer in a prospective, multicenter, two-arm, phase 2 ABCSG 34 trial to receive preoperative standard of care (SOC) neoadjuvant treatment with or without tecemotide.

Postmenopausal women with luminal A tumors were given 6 months of letrozole as SOC. Postmenopausal patients with triple-negative breast cancer, luminal B tumors, in whom chemotherapy was SOC, as well as all premenopausal study participants, were given four cycles of both epirubicin cyclophosphamide and docetaxel every 3 weeks.

The study’s primary endpoint was the residual cancer burden at the time of surgery.

Long-term outcomes were measured as part of a translational project, while distant relapse-free survival (DRFS) and overall survival (OS) were analyzed with Cox regression models. Long-term outcome data were available for 291 women, of whom 236 had received chemotherapy as SOC.

While tecemotide plus neoadjuvant SOC was not associated with a significant increase in residual cancer burden (RCB) at the time of surgery (36.4% vs 31.5%; P = .42; 40.5% vs 34.8%; P = .37 for the chemotherapy-only cohort), follow-up at 7 years showed 80.8% of patients who had received SOC plus tecemotide were still alive and free from metastasis.

In patients who had received SOC alone, the OS rate at 7 years with no metastasis was 64.7% (hazard ratio [HR] for DRFS, 0.53; 95% CI, 0.34-0.83; P = .005). The OS rate for the study group was 83.0% vs 68.2% in the non-tecemotide cohort (HR for OS, 0.53; 95% CI, 0.33-0.85; P = .008).

The lack of RCB signal at the endpoints, “tells us that pathologic complete response and residual cancer burden simply are not adequate endpoints for cancer vaccination studies and we need to find other predictive/prognostic markers, said Dr. Singer. “We are currently looking into this in exploratory studies.”

The chemotherapy plus tecemotide cohort had a notable outcome with a DRFS of 81.9% vs 65.0% in the SOC group (HR, 0.50; 95% CI, 0.31-0.83; P = .007), and an OS rate of 83.6% vs 67.8% (HR, 0.51; 95% CI, 0.30-0.88; P = .016).

Dr. Singer characterized the HRs as intriguing, saying that they “pave the way for new trials.”
 

Ideas for Further Study of Tecemotide

“What we would like to see next for tecemotide are clinical studies that explore whether immunomodulatory agents can further enhance the response to tecemotide in lung, breast, and potentially other MUC-1–expressing cancers,” Dr. Wurz said.

Future phase 3 studies of MUC-1 cancer vaccines, possibly those using mRNA technology, are yet to come, according to Dr. Singer. “We also need to find out why the vaccine works sometimes and sometimes not.”

Dr. Singer disclosed financial ties to AstraZeneca/MedImmune, Daiichi Sankyo Europe, Novartis, Gilead Sciences, Sanofi/Aventis, Amgen, Myriad Genetics, and Roche. Dr. Wurz had no disclosures, but his research partner and founder of RCU Labs, Michael De Gregorio, is the sole inventor of the patent referenced in the story. That patent has been assigned to the Regents of the University of California.

The MUC-1 vaccine tecemotide plus standard neoadjuvant systemic therapy was shown to notably improve distant relapse-free survival and overall survival rates in breast cancer patients, in a new study.

“This is the first successful study of a breast cancer vaccine to date,” Christian F. Singer, MD, said during an interview. Dr. Singer, the lead author of the new study, presented the results during a poster session at the 2024 annual meeting of the American Society of Clinical Oncology (ASCO).

Previously known as both liposomal BLP25 and Stimuvax, tecemotide is an antigen-specific immunotherapy that targets the cancer therapy–resistant MUC-1 glycoprotein, which is overexpressed in over 90% of breast cancers. Tecemotide also has been shown to moderately improve overall survival rates in non–small cell lung cancer.

“We are not at all surprised by the results of this study in breast cancer,” Gregory T. Wurz, PhD, senior researcher at RCU Labs in Lincoln, California, said in an interview.

Dr. Wurz is coauthor of several studies on peptide vaccines, including a mouse model study of human MUC-1–expressing mammary tumors showing that tecemotide combined with letrozole had additive antitumor activity. Another paper he coauthored showed that ospemifene enhanced the immune response to tecemotide in both tumor-bearing and non–tumor-bearing mice. These findings, combined with other research, led to the creation of a patented method of combining therapies to enhance the efficacy of immunotherapy in the treatment of cancer and infectious diseases. Dr. Wurz was not involved in the new research that Dr. Singer presented at ASCO.
 

Study Methods and Results

Dr. Singer, head of obstetrics and gynecology at the Medical University of Vienna, Vienna, Austria, and coauthors randomized 400 patients with HER2-negative early breast cancer in a prospective, multicenter, two-arm, phase 2 ABCSG 34 trial to receive preoperative standard of care (SOC) neoadjuvant treatment with or without tecemotide.

Postmenopausal women with luminal A tumors were given 6 months of letrozole as SOC. Postmenopausal patients with triple-negative breast cancer, luminal B tumors, in whom chemotherapy was SOC, as well as all premenopausal study participants, were given four cycles of both epirubicin cyclophosphamide and docetaxel every 3 weeks.

The study’s primary endpoint was the residual cancer burden at the time of surgery.

Long-term outcomes were measured as part of a translational project, while distant relapse-free survival (DRFS) and overall survival (OS) were analyzed with Cox regression models. Long-term outcome data were available for 291 women, of whom 236 had received chemotherapy as SOC.

While tecemotide plus neoadjuvant SOC was not associated with a significant increase in residual cancer burden (RCB) at the time of surgery (36.4% vs 31.5%; P = .42; 40.5% vs 34.8%; P = .37 for the chemotherapy-only cohort), follow-up at 7 years showed 80.8% of patients who had received SOC plus tecemotide were still alive and free from metastasis.

In patients who had received SOC alone, the OS rate at 7 years with no metastasis was 64.7% (hazard ratio [HR] for DRFS, 0.53; 95% CI, 0.34-0.83; P = .005). The OS rate for the study group was 83.0% vs 68.2% in the non-tecemotide cohort (HR for OS, 0.53; 95% CI, 0.33-0.85; P = .008).

The lack of RCB signal at the endpoints, “tells us that pathologic complete response and residual cancer burden simply are not adequate endpoints for cancer vaccination studies and we need to find other predictive/prognostic markers, said Dr. Singer. “We are currently looking into this in exploratory studies.”

The chemotherapy plus tecemotide cohort had a notable outcome with a DRFS of 81.9% vs 65.0% in the SOC group (HR, 0.50; 95% CI, 0.31-0.83; P = .007), and an OS rate of 83.6% vs 67.8% (HR, 0.51; 95% CI, 0.30-0.88; P = .016).

Dr. Singer characterized the HRs as intriguing, saying that they “pave the way for new trials.”
 

Ideas for Further Study of Tecemotide

“What we would like to see next for tecemotide are clinical studies that explore whether immunomodulatory agents can further enhance the response to tecemotide in lung, breast, and potentially other MUC-1–expressing cancers,” Dr. Wurz said.

Future phase 3 studies of MUC-1 cancer vaccines, possibly those using mRNA technology, are yet to come, according to Dr. Singer. “We also need to find out why the vaccine works sometimes and sometimes not.”

Dr. Singer disclosed financial ties to AstraZeneca/MedImmune, Daiichi Sankyo Europe, Novartis, Gilead Sciences, Sanofi/Aventis, Amgen, Myriad Genetics, and Roche. Dr. Wurz had no disclosures, but his research partner and founder of RCU Labs, Michael De Gregorio, is the sole inventor of the patent referenced in the story. That patent has been assigned to the Regents of the University of California.

The MUC-1 vaccine tecemotide plus standard neoadjuvant systemic therapy was shown to notably improve distant relapse-free survival and overall survival rates in breast cancer patients, in a new study.

“This is the first successful study of a breast cancer vaccine to date,” Christian F. Singer, MD, said during an interview. Dr. Singer, the lead author of the new study, presented the results during a poster session at the 2024 annual meeting of the American Society of Clinical Oncology (ASCO).

Previously known as both liposomal BLP25 and Stimuvax, tecemotide is an antigen-specific immunotherapy that targets the cancer therapy–resistant MUC-1 glycoprotein, which is overexpressed in over 90% of breast cancers. Tecemotide also has been shown to moderately improve overall survival rates in non–small cell lung cancer.

“We are not at all surprised by the results of this study in breast cancer,” Gregory T. Wurz, PhD, senior researcher at RCU Labs in Lincoln, California, said in an interview.

Dr. Wurz is coauthor of several studies on peptide vaccines, including a mouse model study of human MUC-1–expressing mammary tumors showing that tecemotide combined with letrozole had additive antitumor activity. Another paper he coauthored showed that ospemifene enhanced the immune response to tecemotide in both tumor-bearing and non–tumor-bearing mice. These findings, combined with other research, led to the creation of a patented method of combining therapies to enhance the efficacy of immunotherapy in the treatment of cancer and infectious diseases. Dr. Wurz was not involved in the new research that Dr. Singer presented at ASCO.
 

Study Methods and Results

Dr. Singer, head of obstetrics and gynecology at the Medical University of Vienna, Vienna, Austria, and coauthors randomized 400 patients with HER2-negative early breast cancer in a prospective, multicenter, two-arm, phase 2 ABCSG 34 trial to receive preoperative standard of care (SOC) neoadjuvant treatment with or without tecemotide.

Postmenopausal women with luminal A tumors were given 6 months of letrozole as SOC. Postmenopausal patients with triple-negative breast cancer, luminal B tumors, in whom chemotherapy was SOC, as well as all premenopausal study participants, were given four cycles of both epirubicin cyclophosphamide and docetaxel every 3 weeks.

The study’s primary endpoint was the residual cancer burden at the time of surgery.

Long-term outcomes were measured as part of a translational project, while distant relapse-free survival (DRFS) and overall survival (OS) were analyzed with Cox regression models. Long-term outcome data were available for 291 women, of whom 236 had received chemotherapy as SOC.

While tecemotide plus neoadjuvant SOC was not associated with a significant increase in residual cancer burden (RCB) at the time of surgery (36.4% vs 31.5%; P = .42; 40.5% vs 34.8%; P = .37 for the chemotherapy-only cohort), follow-up at 7 years showed 80.8% of patients who had received SOC plus tecemotide were still alive and free from metastasis.

In patients who had received SOC alone, the OS rate at 7 years with no metastasis was 64.7% (hazard ratio [HR] for DRFS, 0.53; 95% CI, 0.34-0.83; P = .005). The OS rate for the study group was 83.0% vs 68.2% in the non-tecemotide cohort (HR for OS, 0.53; 95% CI, 0.33-0.85; P = .008).

The lack of RCB signal at the endpoints, “tells us that pathologic complete response and residual cancer burden simply are not adequate endpoints for cancer vaccination studies and we need to find other predictive/prognostic markers, said Dr. Singer. “We are currently looking into this in exploratory studies.”

The chemotherapy plus tecemotide cohort had a notable outcome with a DRFS of 81.9% vs 65.0% in the SOC group (HR, 0.50; 95% CI, 0.31-0.83; P = .007), and an OS rate of 83.6% vs 67.8% (HR, 0.51; 95% CI, 0.30-0.88; P = .016).

Dr. Singer characterized the HRs as intriguing, saying that they “pave the way for new trials.”
 

Ideas for Further Study of Tecemotide

“What we would like to see next for tecemotide are clinical studies that explore whether immunomodulatory agents can further enhance the response to tecemotide in lung, breast, and potentially other MUC-1–expressing cancers,” Dr. Wurz said.

Future phase 3 studies of MUC-1 cancer vaccines, possibly those using mRNA technology, are yet to come, according to Dr. Singer. “We also need to find out why the vaccine works sometimes and sometimes not.”

Dr. Singer disclosed financial ties to AstraZeneca/MedImmune, Daiichi Sankyo Europe, Novartis, Gilead Sciences, Sanofi/Aventis, Amgen, Myriad Genetics, and Roche. Dr. Wurz had no disclosures, but his research partner and founder of RCU Labs, Michael De Gregorio, is the sole inventor of the patent referenced in the story. That patent has been assigned to the Regents of the University of California.

BERLIN — To date, mRNA vaccines have had their largest global presence in combating the COVID-19 pandemic. Intensive research is underway on many other potential applications for this vaccine technology, which suggests a promising future. Martina Prelog, MD, a pediatric and adolescent medicine specialist at the University Hospital of Würzburg in Germany, reported on the principles, research status, and perspectives for these vaccines at the 25th Travel and Health Forum of the Center for Travel Medicine in Berlin.

To understand the future, the immunologist first examined the past. “The induction of cellular and humoral immune responses by externally injected mRNA was discovered in the 1990s,” she said.
 

Instability Challenge

Significant hurdles in mRNA vaccinations included the instability of mRNA and the immune system’s ability to identify foreign mRNA as a threat and destroy mRNA fragments. “The breakthrough toward vaccination came through Dr. Katalin Karikó, who, along with Dr. Drew Weissman, both of the University of Pennsylvania School of Medicine, discovered in 2005 that modifications of mRNA (replacing the nucleoside uridine with pseudouridine) enable better stability of mRNA, reduced immunogenicity, and higher translational capacity at the ribosomes,” said Dr. Prelog.

With this discovery, the two researchers paved the way for the development of mRNA vaccines against COVID-19 and other diseases. They were awarded the Nobel Prize in medicine for their discovery last year.
 

Improved Scalability

“Since 2009, mRNA vaccines have been studied as a treatment option for cancer,” said Dr. Prelog. “Since 2012, they have been studied for the influenza virus and respiratory syncytial virus [RSV].” Consequently, several mRNA vaccines are currently in development or in approval studies. “The mRNA technology offers the advantage of quickly and flexibly responding to new variants of pathogens and the ability to scale up production when there is high demand for a particular vaccine.”

Different forms and designations of mRNA vaccines are used, depending on the application and desired effect, said Dr. Prelog.

In nucleoside-modified mRNA vaccines, modifications in the mRNA sequence enable the mRNA to remain in the body longer and to induce protein synthesis more effectively.

Lipid nanoparticle (LNP)–encapsulated mRNA vaccines protect the coding mRNA sequences against degradation by the body’s enzymes and facilitate the uptake of mRNA into cells, where it then triggers the production of the desired protein. In addition, LNPs are involved in cell stimulation and support the self-adjuvant effect of mRNA vaccines, thus eliminating the need for adjuvants.

Self-amplifying mRNA vaccines include a special mRNA that replicates itself in the cell and contains a sequence for RNA replicase, in addition to the coding sequence for the protein. This composition enables increased production of the target protein without the need for a high amount of external mRNA administration. Such vaccines could trigger a longer and stronger immune response because the immune system has more time to interact with the protein.
 

Cancer Immunotherapy

Dr. Prelog also discussed personalized vaccines for cancer immunotherapy. Personalized mRNA vaccines are tailored to the patient’s genetic characteristics and antigens. They could be used in cancer immunotherapy to activate the immune system selectively against tumor cells.

Multivalent mRNA vaccines contain mRNA that codes for multiple antigens rather than just one protein to generate an immune response. These vaccines could be particularly useful in fighting pathogens with variable or changing surface structures or in eliciting protection against multiple pathogens simultaneously.

The technology of mRNA-encoded antibodies involves introducing mRNA into the cell, which creates light and heavy chains of antibodies. This step leads to the formation of antibodies targeted against toxins (eg, diphtheria and tetanus), animal venoms, infectious agents, or tumor cells.
 

Genetic Engineering

Dr. Prelog also reviewed genetic engineering techniques. In regenerative therapy or protein replacement therapy, skin fibroblasts or other cells are transfected with mRNA to enable conversion into induced pluripotent stem cells. This approach avoids the risk for DNA integration into the genome and associated mutation risks.

Another approach is making post-transcriptional modifications through RNA interference. For example, RNA structures can be used to inhibit the translation of disease-causing proteins. This technique is currently being tested against HIV and tumors such as melanoma.

In addition, mRNA technologies can be combined with CRISPR/Cas9 technology (“gene scissors”) to influence the creation of gene products even more precisely. The advantage of this technique is that mRNA is only transiently expressed, thus preventing unwanted side effects. Furthermore, mRNA is translated directly in the cytoplasm, leading to a faster initiation of gene editing.

Of the numerous ongoing clinical mRNA vaccine studies, around 70% focus on infections, about 12% on cancer, and the rest on autoimmune diseases and neurodegenerative disorders, said Dr. Prelog.
 

Research in Infections

Research in the fields of infectious diseases and oncology is the most advanced: mRNA vaccines against influenza and RSV are already in advanced clinical trials, Dr. Prelog told this news organization.

“Conventional influenza vaccines contain immunogenic surface molecules against hemagglutinin and neuraminidase in various combinations of influenza strains A and B and are produced in egg or cell cultures,” she said. “This is a time-consuming manufacturing process that takes months and, particularly with the egg-based process, bears the risk of changing the vaccine strain.”

“Additionally, influenza viruses undergo antigenic shift and drift through recombination, thus requiring annual adjustments to the vaccines. Thus, these influenza vaccines often lose accuracy in targeting circulating seasonal influenza strains.”

Several mRNA vaccines being tested contain not only coding sequences against hemagglutinin and neuraminidase but also for structural proteins of influenza viruses. “These are more conserved and mutate less easily, meaning they could serve as the basis for universal pandemic influenza vaccines,” said Dr. Prelog.

An advantage of mRNA vaccines, she added, is the strong cellular immune response that they elicit. This response is intended to provide additional protection alongside specific antibodies. An mRNA vaccine with coding sequences for the pre-fusion protein of RSV is in phase 3 trials for approval for vaccination in patients aged 60 years and older. It shows high effectiveness even in older patients and those with comorbidities.
 

Elaborate Purification Process

Bacterial origin plasmid DNA is used to produce mRNA vaccines. The mRNA vaccines for COVID-19 raised concerns that production-related DNA residues could pose a safety risk and cause autoimmune diseases.

These vaccines “typically undergo a very elaborate purification process,” said Dr. Prelog. “This involves enzymatic digestion with DNase to fragment and deplete plasmid DNA, followed by purification using chromatography columns, so that no safety-relevant DNA fragments should remain afterward.”

Thus, the Paul-Ehrlich-Institut also pointed out the very small, fragmented plasmid DNA residues of bacterial origin in mRNA COVID-19 vaccines pose no risk, unlike residual DNA from animal cell culture might pose in other vaccines.
 

Prevention and Therapy

In addition to the numerous advantages of mRNA vaccines (such as rapid adaptability to new or mutated pathogens, scalability, rapid production capability, self-adjuvant effect, strong induction of cellular immune responses, and safety), there are also challenges in RNA technology as a preventive and therapeutic measure, according to Dr. Prelog.

“Stability and storability, as well as the costs of new vaccine developments, play a role, as do the long-term effects regarding the persistence of antibody and cellular responses,” she said. The COVID-19 mRNA vaccines, for example, showed a well-maintained cellular immune response despite a tendency toward a rapid decline in humoral immune response.

“The experience with COVID-19 mRNA vaccines and the new vaccine developments based on mRNA technology give hope for an efficient and safe preventive and therapeutic use, particularly in the fields of infectious diseases and oncology,” Dr. Prelog concluded.

This story was translated from the Medscape German edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

BERLIN — To date, mRNA vaccines have had their largest global presence in combating the COVID-19 pandemic. Intensive research is underway on many other potential applications for this vaccine technology, which suggests a promising future. Martina Prelog, MD, a pediatric and adolescent medicine specialist at the University Hospital of Würzburg in Germany, reported on the principles, research status, and perspectives for these vaccines at the 25th Travel and Health Forum of the Center for Travel Medicine in Berlin.

To understand the future, the immunologist first examined the past. “The induction of cellular and humoral immune responses by externally injected mRNA was discovered in the 1990s,” she said.
 

Instability Challenge

Significant hurdles in mRNA vaccinations included the instability of mRNA and the immune system’s ability to identify foreign mRNA as a threat and destroy mRNA fragments. “The breakthrough toward vaccination came through Dr. Katalin Karikó, who, along with Dr. Drew Weissman, both of the University of Pennsylvania School of Medicine, discovered in 2005 that modifications of mRNA (replacing the nucleoside uridine with pseudouridine) enable better stability of mRNA, reduced immunogenicity, and higher translational capacity at the ribosomes,” said Dr. Prelog.

With this discovery, the two researchers paved the way for the development of mRNA vaccines against COVID-19 and other diseases. They were awarded the Nobel Prize in medicine for their discovery last year.
 

Improved Scalability

“Since 2009, mRNA vaccines have been studied as a treatment option for cancer,” said Dr. Prelog. “Since 2012, they have been studied for the influenza virus and respiratory syncytial virus [RSV].” Consequently, several mRNA vaccines are currently in development or in approval studies. “The mRNA technology offers the advantage of quickly and flexibly responding to new variants of pathogens and the ability to scale up production when there is high demand for a particular vaccine.”

Different forms and designations of mRNA vaccines are used, depending on the application and desired effect, said Dr. Prelog.

In nucleoside-modified mRNA vaccines, modifications in the mRNA sequence enable the mRNA to remain in the body longer and to induce protein synthesis more effectively.

Lipid nanoparticle (LNP)–encapsulated mRNA vaccines protect the coding mRNA sequences against degradation by the body’s enzymes and facilitate the uptake of mRNA into cells, where it then triggers the production of the desired protein. In addition, LNPs are involved in cell stimulation and support the self-adjuvant effect of mRNA vaccines, thus eliminating the need for adjuvants.

Self-amplifying mRNA vaccines include a special mRNA that replicates itself in the cell and contains a sequence for RNA replicase, in addition to the coding sequence for the protein. This composition enables increased production of the target protein without the need for a high amount of external mRNA administration. Such vaccines could trigger a longer and stronger immune response because the immune system has more time to interact with the protein.
 

Cancer Immunotherapy

Dr. Prelog also discussed personalized vaccines for cancer immunotherapy. Personalized mRNA vaccines are tailored to the patient’s genetic characteristics and antigens. They could be used in cancer immunotherapy to activate the immune system selectively against tumor cells.

Multivalent mRNA vaccines contain mRNA that codes for multiple antigens rather than just one protein to generate an immune response. These vaccines could be particularly useful in fighting pathogens with variable or changing surface structures or in eliciting protection against multiple pathogens simultaneously.

The technology of mRNA-encoded antibodies involves introducing mRNA into the cell, which creates light and heavy chains of antibodies. This step leads to the formation of antibodies targeted against toxins (eg, diphtheria and tetanus), animal venoms, infectious agents, or tumor cells.
 

Genetic Engineering

Dr. Prelog also reviewed genetic engineering techniques. In regenerative therapy or protein replacement therapy, skin fibroblasts or other cells are transfected with mRNA to enable conversion into induced pluripotent stem cells. This approach avoids the risk for DNA integration into the genome and associated mutation risks.

Another approach is making post-transcriptional modifications through RNA interference. For example, RNA structures can be used to inhibit the translation of disease-causing proteins. This technique is currently being tested against HIV and tumors such as melanoma.

In addition, mRNA technologies can be combined with CRISPR/Cas9 technology (“gene scissors”) to influence the creation of gene products even more precisely. The advantage of this technique is that mRNA is only transiently expressed, thus preventing unwanted side effects. Furthermore, mRNA is translated directly in the cytoplasm, leading to a faster initiation of gene editing.

Of the numerous ongoing clinical mRNA vaccine studies, around 70% focus on infections, about 12% on cancer, and the rest on autoimmune diseases and neurodegenerative disorders, said Dr. Prelog.
 

Research in Infections

Research in the fields of infectious diseases and oncology is the most advanced: mRNA vaccines against influenza and RSV are already in advanced clinical trials, Dr. Prelog told this news organization.

“Conventional influenza vaccines contain immunogenic surface molecules against hemagglutinin and neuraminidase in various combinations of influenza strains A and B and are produced in egg or cell cultures,” she said. “This is a time-consuming manufacturing process that takes months and, particularly with the egg-based process, bears the risk of changing the vaccine strain.”

“Additionally, influenza viruses undergo antigenic shift and drift through recombination, thus requiring annual adjustments to the vaccines. Thus, these influenza vaccines often lose accuracy in targeting circulating seasonal influenza strains.”

Several mRNA vaccines being tested contain not only coding sequences against hemagglutinin and neuraminidase but also for structural proteins of influenza viruses. “These are more conserved and mutate less easily, meaning they could serve as the basis for universal pandemic influenza vaccines,” said Dr. Prelog.

An advantage of mRNA vaccines, she added, is the strong cellular immune response that they elicit. This response is intended to provide additional protection alongside specific antibodies. An mRNA vaccine with coding sequences for the pre-fusion protein of RSV is in phase 3 trials for approval for vaccination in patients aged 60 years and older. It shows high effectiveness even in older patients and those with comorbidities.
 

Elaborate Purification Process

Bacterial origin plasmid DNA is used to produce mRNA vaccines. The mRNA vaccines for COVID-19 raised concerns that production-related DNA residues could pose a safety risk and cause autoimmune diseases.

These vaccines “typically undergo a very elaborate purification process,” said Dr. Prelog. “This involves enzymatic digestion with DNase to fragment and deplete plasmid DNA, followed by purification using chromatography columns, so that no safety-relevant DNA fragments should remain afterward.”

Thus, the Paul-Ehrlich-Institut also pointed out the very small, fragmented plasmid DNA residues of bacterial origin in mRNA COVID-19 vaccines pose no risk, unlike residual DNA from animal cell culture might pose in other vaccines.
 

Prevention and Therapy

In addition to the numerous advantages of mRNA vaccines (such as rapid adaptability to new or mutated pathogens, scalability, rapid production capability, self-adjuvant effect, strong induction of cellular immune responses, and safety), there are also challenges in RNA technology as a preventive and therapeutic measure, according to Dr. Prelog.

“Stability and storability, as well as the costs of new vaccine developments, play a role, as do the long-term effects regarding the persistence of antibody and cellular responses,” she said. The COVID-19 mRNA vaccines, for example, showed a well-maintained cellular immune response despite a tendency toward a rapid decline in humoral immune response.

“The experience with COVID-19 mRNA vaccines and the new vaccine developments based on mRNA technology give hope for an efficient and safe preventive and therapeutic use, particularly in the fields of infectious diseases and oncology,” Dr. Prelog concluded.

This story was translated from the Medscape German edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

BERLIN — To date, mRNA vaccines have had their largest global presence in combating the COVID-19 pandemic. Intensive research is underway on many other potential applications for this vaccine technology, which suggests a promising future. Martina Prelog, MD, a pediatric and adolescent medicine specialist at the University Hospital of Würzburg in Germany, reported on the principles, research status, and perspectives for these vaccines at the 25th Travel and Health Forum of the Center for Travel Medicine in Berlin.

To understand the future, the immunologist first examined the past. “The induction of cellular and humoral immune responses by externally injected mRNA was discovered in the 1990s,” she said.
 

Instability Challenge

Significant hurdles in mRNA vaccinations included the instability of mRNA and the immune system’s ability to identify foreign mRNA as a threat and destroy mRNA fragments. “The breakthrough toward vaccination came through Dr. Katalin Karikó, who, along with Dr. Drew Weissman, both of the University of Pennsylvania School of Medicine, discovered in 2005 that modifications of mRNA (replacing the nucleoside uridine with pseudouridine) enable better stability of mRNA, reduced immunogenicity, and higher translational capacity at the ribosomes,” said Dr. Prelog.

With this discovery, the two researchers paved the way for the development of mRNA vaccines against COVID-19 and other diseases. They were awarded the Nobel Prize in medicine for their discovery last year.
 

Improved Scalability

“Since 2009, mRNA vaccines have been studied as a treatment option for cancer,” said Dr. Prelog. “Since 2012, they have been studied for the influenza virus and respiratory syncytial virus [RSV].” Consequently, several mRNA vaccines are currently in development or in approval studies. “The mRNA technology offers the advantage of quickly and flexibly responding to new variants of pathogens and the ability to scale up production when there is high demand for a particular vaccine.”

Different forms and designations of mRNA vaccines are used, depending on the application and desired effect, said Dr. Prelog.

In nucleoside-modified mRNA vaccines, modifications in the mRNA sequence enable the mRNA to remain in the body longer and to induce protein synthesis more effectively.

Lipid nanoparticle (LNP)–encapsulated mRNA vaccines protect the coding mRNA sequences against degradation by the body’s enzymes and facilitate the uptake of mRNA into cells, where it then triggers the production of the desired protein. In addition, LNPs are involved in cell stimulation and support the self-adjuvant effect of mRNA vaccines, thus eliminating the need for adjuvants.

Self-amplifying mRNA vaccines include a special mRNA that replicates itself in the cell and contains a sequence for RNA replicase, in addition to the coding sequence for the protein. This composition enables increased production of the target protein without the need for a high amount of external mRNA administration. Such vaccines could trigger a longer and stronger immune response because the immune system has more time to interact with the protein.
 

Cancer Immunotherapy

Dr. Prelog also discussed personalized vaccines for cancer immunotherapy. Personalized mRNA vaccines are tailored to the patient’s genetic characteristics and antigens. They could be used in cancer immunotherapy to activate the immune system selectively against tumor cells.

Multivalent mRNA vaccines contain mRNA that codes for multiple antigens rather than just one protein to generate an immune response. These vaccines could be particularly useful in fighting pathogens with variable or changing surface structures or in eliciting protection against multiple pathogens simultaneously.

The technology of mRNA-encoded antibodies involves introducing mRNA into the cell, which creates light and heavy chains of antibodies. This step leads to the formation of antibodies targeted against toxins (eg, diphtheria and tetanus), animal venoms, infectious agents, or tumor cells.
 

Genetic Engineering

Dr. Prelog also reviewed genetic engineering techniques. In regenerative therapy or protein replacement therapy, skin fibroblasts or other cells are transfected with mRNA to enable conversion into induced pluripotent stem cells. This approach avoids the risk for DNA integration into the genome and associated mutation risks.

Another approach is making post-transcriptional modifications through RNA interference. For example, RNA structures can be used to inhibit the translation of disease-causing proteins. This technique is currently being tested against HIV and tumors such as melanoma.

In addition, mRNA technologies can be combined with CRISPR/Cas9 technology (“gene scissors”) to influence the creation of gene products even more precisely. The advantage of this technique is that mRNA is only transiently expressed, thus preventing unwanted side effects. Furthermore, mRNA is translated directly in the cytoplasm, leading to a faster initiation of gene editing.

Of the numerous ongoing clinical mRNA vaccine studies, around 70% focus on infections, about 12% on cancer, and the rest on autoimmune diseases and neurodegenerative disorders, said Dr. Prelog.
 

Research in Infections

Research in the fields of infectious diseases and oncology is the most advanced: mRNA vaccines against influenza and RSV are already in advanced clinical trials, Dr. Prelog told this news organization.

“Conventional influenza vaccines contain immunogenic surface molecules against hemagglutinin and neuraminidase in various combinations of influenza strains A and B and are produced in egg or cell cultures,” she said. “This is a time-consuming manufacturing process that takes months and, particularly with the egg-based process, bears the risk of changing the vaccine strain.”

“Additionally, influenza viruses undergo antigenic shift and drift through recombination, thus requiring annual adjustments to the vaccines. Thus, these influenza vaccines often lose accuracy in targeting circulating seasonal influenza strains.”

Several mRNA vaccines being tested contain not only coding sequences against hemagglutinin and neuraminidase but also for structural proteins of influenza viruses. “These are more conserved and mutate less easily, meaning they could serve as the basis for universal pandemic influenza vaccines,” said Dr. Prelog.

An advantage of mRNA vaccines, she added, is the strong cellular immune response that they elicit. This response is intended to provide additional protection alongside specific antibodies. An mRNA vaccine with coding sequences for the pre-fusion protein of RSV is in phase 3 trials for approval for vaccination in patients aged 60 years and older. It shows high effectiveness even in older patients and those with comorbidities.
 

Elaborate Purification Process

Bacterial origin plasmid DNA is used to produce mRNA vaccines. The mRNA vaccines for COVID-19 raised concerns that production-related DNA residues could pose a safety risk and cause autoimmune diseases.

These vaccines “typically undergo a very elaborate purification process,” said Dr. Prelog. “This involves enzymatic digestion with DNase to fragment and deplete plasmid DNA, followed by purification using chromatography columns, so that no safety-relevant DNA fragments should remain afterward.”

Thus, the Paul-Ehrlich-Institut also pointed out the very small, fragmented plasmid DNA residues of bacterial origin in mRNA COVID-19 vaccines pose no risk, unlike residual DNA from animal cell culture might pose in other vaccines.
 

Prevention and Therapy

In addition to the numerous advantages of mRNA vaccines (such as rapid adaptability to new or mutated pathogens, scalability, rapid production capability, self-adjuvant effect, strong induction of cellular immune responses, and safety), there are also challenges in RNA technology as a preventive and therapeutic measure, according to Dr. Prelog.

“Stability and storability, as well as the costs of new vaccine developments, play a role, as do the long-term effects regarding the persistence of antibody and cellular responses,” she said. The COVID-19 mRNA vaccines, for example, showed a well-maintained cellular immune response despite a tendency toward a rapid decline in humoral immune response.

“The experience with COVID-19 mRNA vaccines and the new vaccine developments based on mRNA technology give hope for an efficient and safe preventive and therapeutic use, particularly in the fields of infectious diseases and oncology,” Dr. Prelog concluded.

This story was translated from the Medscape German edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

TOPLINE:

Overall, patients with solid tumors who receive an investigational cancer drug experience small progression-free survival (PFS) and overall survival benefits but much higher toxicity than those who receive a control intervention.

METHODOLOGY:

• The view that patients with cancer benefit from access to investigational drugs in the clinical trial setting is widely held but does necessarily align with trial findings, which often show limited evidence of a clinical benefit. First, most investigational treatments assessed in clinical trials fail to gain regulatory approval, and the minority that are approved tend to offer minimal clinical benefit, experts explained.
• To estimate the survival benefit and toxicities associated with receiving experimental treatments, researchers conducted a meta-analysis of 128 trials comprising 141 comparisons of an investigational drug and a control treatment, which included immunotherapies and targeted therapies.
• The analysis included 42 trials in non–small cell lung cancer (NSCLC), 37 in breast cancer, 15 in hepatobiliary cancer, 13 in pancreatic cancer, 12 in colorectal cancer, and 10 in prostate cancer, involving a total of 47,050 patients.
• The primary outcome was PFS and secondary outcomes were overall survival and grades 3-5 serious adverse events.

TAKEAWAY:

• Overall, the experimental treatment was associated with a 20% improvement in PFS (pooled hazard ratio [HR], 0.80), corresponding to a median 1.25-month PFS advantage. The PFS benefit was seen across all cancer types, except pancreatic cancer.
• Overall survival improved by 8% with experimental agents (HR, 0.92), corresponding to 1.18 additional months. A significant overall survival benefit was seen across NSCLC, breast cancer, and hepatobiliary cancer trials but not pancreatic, prostate, colorectal cancer trials.
• Patients in the experimental intervention group, however, experienced much higher risk for grade 3-5 serious adverse events (risk ratio [RR], 1.27), corresponding to 7.40% increase in absolute risk. The greater risk for serious adverse events was significant for all indications except prostate cancer (RR, 1.13; 95% CI, 0.91-1.40).

IN PRACTICE:

“We believe our findings are best interpreted as suggesting that access to experimental interventions that have not yet received full FDA approval is associated with a marginal but nonzero clinical benefit,” the authors wrote. 

“Although our findings seem to reflect poorly on trials as a vehicle for extending survival for participants, they have reassuring implications for clinical investigators, policymakers, and institutional review boards,” the researchers said, explaining that this “scenario allows clinical trials to continue to pursue promising new treatments — supporting incremental advances that sum to large gains over extended periods of research — without disadvantaging patients in comparator groups.”

SOURCE: 

Renata Iskander, MSc, of McGill University, Montreal, Quebec, Canada, led this work, which was published online on April 29, 2024, in Annals of Internal Medicine.

LIMITATIONS:

There was high heterogeneity across studies due to variations in drugs tested, comparators used, and populations involved. The use of comparators below standard care could have inflated survival benefits. Additionally, data collected from ClinicalTrials.gov might be biased due to some trials not being reported. 

DISCLOSURES:

Canadian Institutes of Health Research supported this work. The authors received grants for this work from McGill University, Rossy Cancer Network, and National Science Foundation. One author received consulting fees outside this work. The other authors declared no competing interests.

A version of this article appeared on Medscape.com.

TOPLINE:

Overall, patients with solid tumors who receive an investigational cancer drug experience small progression-free survival (PFS) and overall survival benefits but much higher toxicity than those who receive a control intervention.

METHODOLOGY:

• The view that patients with cancer benefit from access to investigational drugs in the clinical trial setting is widely held but does necessarily align with trial findings, which often show limited evidence of a clinical benefit. First, most investigational treatments assessed in clinical trials fail to gain regulatory approval, and the minority that are approved tend to offer minimal clinical benefit, experts explained.
• To estimate the survival benefit and toxicities associated with receiving experimental treatments, researchers conducted a meta-analysis of 128 trials comprising 141 comparisons of an investigational drug and a control treatment, which included immunotherapies and targeted therapies.
• The analysis included 42 trials in non–small cell lung cancer (NSCLC), 37 in breast cancer, 15 in hepatobiliary cancer, 13 in pancreatic cancer, 12 in colorectal cancer, and 10 in prostate cancer, involving a total of 47,050 patients.
• The primary outcome was PFS and secondary outcomes were overall survival and grades 3-5 serious adverse events.

TAKEAWAY:

• Overall, the experimental treatment was associated with a 20% improvement in PFS (pooled hazard ratio [HR], 0.80), corresponding to a median 1.25-month PFS advantage. The PFS benefit was seen across all cancer types, except pancreatic cancer.
• Overall survival improved by 8% with experimental agents (HR, 0.92), corresponding to 1.18 additional months. A significant overall survival benefit was seen across NSCLC, breast cancer, and hepatobiliary cancer trials but not pancreatic, prostate, colorectal cancer trials.
• Patients in the experimental intervention group, however, experienced much higher risk for grade 3-5 serious adverse events (risk ratio [RR], 1.27), corresponding to 7.40% increase in absolute risk. The greater risk for serious adverse events was significant for all indications except prostate cancer (RR, 1.13; 95% CI, 0.91-1.40).

IN PRACTICE:

“We believe our findings are best interpreted as suggesting that access to experimental interventions that have not yet received full FDA approval is associated with a marginal but nonzero clinical benefit,” the authors wrote. 

“Although our findings seem to reflect poorly on trials as a vehicle for extending survival for participants, they have reassuring implications for clinical investigators, policymakers, and institutional review boards,” the researchers said, explaining that this “scenario allows clinical trials to continue to pursue promising new treatments — supporting incremental advances that sum to large gains over extended periods of research — without disadvantaging patients in comparator groups.”

SOURCE: 

Renata Iskander, MSc, of McGill University, Montreal, Quebec, Canada, led this work, which was published online on April 29, 2024, in Annals of Internal Medicine.

LIMITATIONS:

There was high heterogeneity across studies due to variations in drugs tested, comparators used, and populations involved. The use of comparators below standard care could have inflated survival benefits. Additionally, data collected from ClinicalTrials.gov might be biased due to some trials not being reported. 

DISCLOSURES:

Canadian Institutes of Health Research supported this work. The authors received grants for this work from McGill University, Rossy Cancer Network, and National Science Foundation. One author received consulting fees outside this work. The other authors declared no competing interests.

A version of this article appeared on Medscape.com.

TOPLINE:

Overall, patients with solid tumors who receive an investigational cancer drug experience small progression-free survival (PFS) and overall survival benefits but much higher toxicity than those who receive a control intervention.

METHODOLOGY:

• The view that patients with cancer benefit from access to investigational drugs in the clinical trial setting is widely held but does necessarily align with trial findings, which often show limited evidence of a clinical benefit. First, most investigational treatments assessed in clinical trials fail to gain regulatory approval, and the minority that are approved tend to offer minimal clinical benefit, experts explained.
• To estimate the survival benefit and toxicities associated with receiving experimental treatments, researchers conducted a meta-analysis of 128 trials comprising 141 comparisons of an investigational drug and a control treatment, which included immunotherapies and targeted therapies.
• The analysis included 42 trials in non–small cell lung cancer (NSCLC), 37 in breast cancer, 15 in hepatobiliary cancer, 13 in pancreatic cancer, 12 in colorectal cancer, and 10 in prostate cancer, involving a total of 47,050 patients.
• The primary outcome was PFS and secondary outcomes were overall survival and grades 3-5 serious adverse events.

TAKEAWAY:

• Overall, the experimental treatment was associated with a 20% improvement in PFS (pooled hazard ratio [HR], 0.80), corresponding to a median 1.25-month PFS advantage. The PFS benefit was seen across all cancer types, except pancreatic cancer.
• Overall survival improved by 8% with experimental agents (HR, 0.92), corresponding to 1.18 additional months. A significant overall survival benefit was seen across NSCLC, breast cancer, and hepatobiliary cancer trials but not pancreatic, prostate, colorectal cancer trials.
• Patients in the experimental intervention group, however, experienced much higher risk for grade 3-5 serious adverse events (risk ratio [RR], 1.27), corresponding to 7.40% increase in absolute risk. The greater risk for serious adverse events was significant for all indications except prostate cancer (RR, 1.13; 95% CI, 0.91-1.40).

IN PRACTICE:

“We believe our findings are best interpreted as suggesting that access to experimental interventions that have not yet received full FDA approval is associated with a marginal but nonzero clinical benefit,” the authors wrote. 

“Although our findings seem to reflect poorly on trials as a vehicle for extending survival for participants, they have reassuring implications for clinical investigators, policymakers, and institutional review boards,” the researchers said, explaining that this “scenario allows clinical trials to continue to pursue promising new treatments — supporting incremental advances that sum to large gains over extended periods of research — without disadvantaging patients in comparator groups.”

SOURCE: 

Renata Iskander, MSc, of McGill University, Montreal, Quebec, Canada, led this work, which was published online on April 29, 2024, in Annals of Internal Medicine.

LIMITATIONS:

There was high heterogeneity across studies due to variations in drugs tested, comparators used, and populations involved. The use of comparators below standard care could have inflated survival benefits. Additionally, data collected from ClinicalTrials.gov might be biased due to some trials not being reported. 

DISCLOSURES:

Canadian Institutes of Health Research supported this work. The authors received grants for this work from McGill University, Rossy Cancer Network, and National Science Foundation. One author received consulting fees outside this work. The other authors declared no competing interests.

A version of this article appeared on Medscape.com.

The advent of new immune checkpoint inhibitor combinations for urothelial carcinoma has yielded dramatic changes in patient care, according to Thomas W. Flaig, MD, vice chancellor for research at the University of Colorado Anschutz Medical Campus, Aurora.

Combination therapies involving enfortumab and nivolumab are demonstrating success in recent studies and have been incorporated into the latest guidelines, Dr. Flaig said in a presentation at the National Comprehensive Cancer Network (NCCN) annual conference.
 

What's New in The Updated Guidelines?

Advances in the treatment options for metastatic urothelial carcinoma in the last decade have been dramatic, with ongoing developments and new emerging treatment options, Dr. Flaig told the audience of his session.

This has led to the identification of new and effective immune checkpoint inhibitor combinations. Consequently, immune checkpoint inhibitors are currently included in all preferred/other recommended first-line treatment regimens, he said.

“Enfortumab vedotin plus pembrolizumab is now the sole preferred first-line regimen for locally advanced or metastatic disease.” Based on the recent research, the mindset regarding cisplatin-eligible patient selection may be changing, he added.

“We have used cisplatin eligibility as a key factor in determining first-line therapy for years, and that paradigm is now shifting with the emergence of enfortumab plus pembrolizumab, a new non–cisplatin containing regimen” Dr. Flaig noted.

Although the optimal choice for second- or third-line therapy after immune checkpoint inhibitors is not well-defined, options include platinum regimens, antibody-drug conjugate, and erdafitinib in eligible patients, he said.
 

Other Current Strategies for Localized Bladder Cancer Management

The incidence of bladder cancer has been stable for decades, with minimal therapeutic developments until the approval of immune checkpoint inhibitors in the last decade, Dr. Flaig said.

Bladder cancer is more common in older adults, with an average onset age of 73 years, and most patients (75%) are male, he said. Comorbid disease is common in these patients, and many have a history of smoking, Dr. Flaig added.

The traditional medical approach to treating bladder cancer has been based on combination therapies including cisplatin. This has also reflected the approach used in the treatment of lung cancer, historically, Dr. Flaig said.

Cisplatin, while effective, is a challenging therapy to administer and is not an option for all bladder cancer patients because of potential adverse effects, he noted. Antibody drug conjugates and immune checkpoint inhibitors are new alternatives for some who are not able to receive cisplatin.

What are the New Options for Treating Metastatic Urothelial Bladder Cancer?

The approval of antibody drug conjugates offers new treatment with a “specific target and therapeutic payload,” said Dr. Flaig in his presentation. Two antibody drug conjugates, enfortumab vedotin and sacituzumab govitecan, have been approved by the US Food and Drug Administration (FDA), he said. Enforumab vedotin was approved by the FDA in 2021 for adults with locally advanced or metastatic urothelial cancer for subsequent line therapy in select patients. In a 2021 study published in The New England Journal of Medicine, the primary outcome of overall response rate was significantly greater in patients with advanced urothelial carcinoma who were treated with enfortumab vedotin than in those treated with standard chemotherapy (overall response rate [ORR] 40.6% vs 17.9%, respectively).

Side effects associated with enfortumab vedotin “are intrinsic to the payload toxicity and the target distribution. Ideally, the target would be present on all of the cancer cells and none of the normal tissue,” said Dr. Flaig. With enfortumab, specific toxicities included neuropathy, skin reactions, and blood glucose elevation/diabetic ketoacidosis, he said.

A second agent, sacituzumab govitecan, was approved by the FDA for metastatic urothelial cancer patients in 2021, based on data from the TROPHY-U-O1 phase 2 open-label study of 113 individuals. In that study, the ORR was 27% at a median follow-up of 9.1 months. Adverse events included neutropenia, leukopenia, and diarrhea.
 

What Do the Latest Studies of Combination Therapy Show?

Immune checkpoint inhibitor combinations are significantly changing the landscape of bladder cancer treatment, Dr. Flaig explained.

A recent phase 3 study published in 2024 in The New England Journal of Medicine comparing enfortumab vedotin plus pembrolizumab to platinum-based combination chemotherapy showed an overall response rate of 67.7% vs 44.4% in favor of enfortumab/pembrolizumab, said Dr. Flaig. In addition, the risk of disease progression or death was approximately 55% lower in the enfortumab vedotin-pembrolizumab group vs the chemotherapy group (hazard ratio [HR], 0.45; P less than .001) and the median progression-free survival was approximately doubled (12.5 months vs 6.3 months).

Dr. Flaig described this study as “very notable”because “the enfortumab plus pembrolizumab arm was clearly more effective than the long-standing chemotherapy arm, now becoming the preferred, first-line treatment in the NCCN guidelines. Based on preliminary results of the study, this combination was approved by the FDA in 2023 for locally advanced or metastatic urothelial cancer patients regardless of their eligibility for cisplatin.

Another promising combination, nivolumab plus gemcitabine-cisplatin, was associated with significantly longer overall and progression-free survival in patients with previously untreated unresectable or metastatic urothelial carcinoma, Dr. Flaig said. The therapy was approved by the FDA in March 2024 for first-line therapy.

In a study of 608 patients published in The New England Journal of Medicine, median overall survival was 21.7 months for the nivolumab group vs 18.9 months for the gemcitabine-cisplatin alone group. The overall response rates were 57.6% in the nivolumab group vs 43.1% in the gemcitabine-cisplatin–alone group, and complete response rates were 21.7% and 11.8%, respectively. Serious adverse events (grade 3 or higher) were similar between the groups (61.8% and 51.7%, respectively).
 

What About Targeted Therapy?

Erdafitinib, a tyrosine kinase inhibitor of FGFR1–4, was approved by the FDA in January 2024 for adults with locally advanced or metastatic urothelial carcinoma who had susceptible FGFR3 genetic alterations, said Dr. Flaig, during his presentation. The limitation of this treatment to only those patients with an FGFR3 mutation is a recent update in its use, he noted.

“Up to 20% of patients with advanced urothelial carcinoma have FGFR alterations,” he said. In an open-label phase 2 study of 99 individuals with unresectable or metastatic urothelial carcinoma, past chemotherapy, and FGFR alterations, confirmed response to erdafitinib was 40% with a median overall survival of 13.8 months.

Dr. Flaig disclosed grant/research support from Agensys; Astellas Pharma US; AstraZeneca Pharmaceuticals LP; Bristol Myers Squibb; Genentech, Inc.; Janssen Pharmaceutica Products, LP; Merck & Co.; Sanofi-Aventis U.S.; and SeaGen. He also disclosed equity interest/stock options and intellectual property rights in Aurora Oncology, and serving as a consultant or scientific advisor for Janssen Pharmaceutica Product, LP, and Criterium, Inc.

The advent of new immune checkpoint inhibitor combinations for urothelial carcinoma has yielded dramatic changes in patient care, according to Thomas W. Flaig, MD, vice chancellor for research at the University of Colorado Anschutz Medical Campus, Aurora.

Combination therapies involving enfortumab and nivolumab are demonstrating success in recent studies and have been incorporated into the latest guidelines, Dr. Flaig said in a presentation at the National Comprehensive Cancer Network (NCCN) annual conference.
 

What's New in The Updated Guidelines?

Advances in the treatment options for metastatic urothelial carcinoma in the last decade have been dramatic, with ongoing developments and new emerging treatment options, Dr. Flaig told the audience of his session.

This has led to the identification of new and effective immune checkpoint inhibitor combinations. Consequently, immune checkpoint inhibitors are currently included in all preferred/other recommended first-line treatment regimens, he said.

“Enfortumab vedotin plus pembrolizumab is now the sole preferred first-line regimen for locally advanced or metastatic disease.” Based on the recent research, the mindset regarding cisplatin-eligible patient selection may be changing, he added.

“We have used cisplatin eligibility as a key factor in determining first-line therapy for years, and that paradigm is now shifting with the emergence of enfortumab plus pembrolizumab, a new non–cisplatin containing regimen” Dr. Flaig noted.

Although the optimal choice for second- or third-line therapy after immune checkpoint inhibitors is not well-defined, options include platinum regimens, antibody-drug conjugate, and erdafitinib in eligible patients, he said.
 

Other Current Strategies for Localized Bladder Cancer Management

The incidence of bladder cancer has been stable for decades, with minimal therapeutic developments until the approval of immune checkpoint inhibitors in the last decade, Dr. Flaig said.

Bladder cancer is more common in older adults, with an average onset age of 73 years, and most patients (75%) are male, he said. Comorbid disease is common in these patients, and many have a history of smoking, Dr. Flaig added.

The traditional medical approach to treating bladder cancer has been based on combination therapies including cisplatin. This has also reflected the approach used in the treatment of lung cancer, historically, Dr. Flaig said.

Cisplatin, while effective, is a challenging therapy to administer and is not an option for all bladder cancer patients because of potential adverse effects, he noted. Antibody drug conjugates and immune checkpoint inhibitors are new alternatives for some who are not able to receive cisplatin.

What are the New Options for Treating Metastatic Urothelial Bladder Cancer?

The approval of antibody drug conjugates offers new treatment with a “specific target and therapeutic payload,” said Dr. Flaig in his presentation. Two antibody drug conjugates, enfortumab vedotin and sacituzumab govitecan, have been approved by the US Food and Drug Administration (FDA), he said. Enforumab vedotin was approved by the FDA in 2021 for adults with locally advanced or metastatic urothelial cancer for subsequent line therapy in select patients. In a 2021 study published in The New England Journal of Medicine, the primary outcome of overall response rate was significantly greater in patients with advanced urothelial carcinoma who were treated with enfortumab vedotin than in those treated with standard chemotherapy (overall response rate [ORR] 40.6% vs 17.9%, respectively).

Side effects associated with enfortumab vedotin “are intrinsic to the payload toxicity and the target distribution. Ideally, the target would be present on all of the cancer cells and none of the normal tissue,” said Dr. Flaig. With enfortumab, specific toxicities included neuropathy, skin reactions, and blood glucose elevation/diabetic ketoacidosis, he said.

A second agent, sacituzumab govitecan, was approved by the FDA for metastatic urothelial cancer patients in 2021, based on data from the TROPHY-U-O1 phase 2 open-label study of 113 individuals. In that study, the ORR was 27% at a median follow-up of 9.1 months. Adverse events included neutropenia, leukopenia, and diarrhea.
 

What Do the Latest Studies of Combination Therapy Show?

Immune checkpoint inhibitor combinations are significantly changing the landscape of bladder cancer treatment, Dr. Flaig explained.

A recent phase 3 study published in 2024 in The New England Journal of Medicine comparing enfortumab vedotin plus pembrolizumab to platinum-based combination chemotherapy showed an overall response rate of 67.7% vs 44.4% in favor of enfortumab/pembrolizumab, said Dr. Flaig. In addition, the risk of disease progression or death was approximately 55% lower in the enfortumab vedotin-pembrolizumab group vs the chemotherapy group (hazard ratio [HR], 0.45; P less than .001) and the median progression-free survival was approximately doubled (12.5 months vs 6.3 months).

Dr. Flaig described this study as “very notable”because “the enfortumab plus pembrolizumab arm was clearly more effective than the long-standing chemotherapy arm, now becoming the preferred, first-line treatment in the NCCN guidelines. Based on preliminary results of the study, this combination was approved by the FDA in 2023 for locally advanced or metastatic urothelial cancer patients regardless of their eligibility for cisplatin.

Another promising combination, nivolumab plus gemcitabine-cisplatin, was associated with significantly longer overall and progression-free survival in patients with previously untreated unresectable or metastatic urothelial carcinoma, Dr. Flaig said. The therapy was approved by the FDA in March 2024 for first-line therapy.

In a study of 608 patients published in The New England Journal of Medicine, median overall survival was 21.7 months for the nivolumab group vs 18.9 months for the gemcitabine-cisplatin alone group. The overall response rates were 57.6% in the nivolumab group vs 43.1% in the gemcitabine-cisplatin–alone group, and complete response rates were 21.7% and 11.8%, respectively. Serious adverse events (grade 3 or higher) were similar between the groups (61.8% and 51.7%, respectively).
 

What About Targeted Therapy?

Erdafitinib, a tyrosine kinase inhibitor of FGFR1–4, was approved by the FDA in January 2024 for adults with locally advanced or metastatic urothelial carcinoma who had susceptible FGFR3 genetic alterations, said Dr. Flaig, during his presentation. The limitation of this treatment to only those patients with an FGFR3 mutation is a recent update in its use, he noted.

“Up to 20% of patients with advanced urothelial carcinoma have FGFR alterations,” he said. In an open-label phase 2 study of 99 individuals with unresectable or metastatic urothelial carcinoma, past chemotherapy, and FGFR alterations, confirmed response to erdafitinib was 40% with a median overall survival of 13.8 months.

Dr. Flaig disclosed grant/research support from Agensys; Astellas Pharma US; AstraZeneca Pharmaceuticals LP; Bristol Myers Squibb; Genentech, Inc.; Janssen Pharmaceutica Products, LP; Merck & Co.; Sanofi-Aventis U.S.; and SeaGen. He also disclosed equity interest/stock options and intellectual property rights in Aurora Oncology, and serving as a consultant or scientific advisor for Janssen Pharmaceutica Product, LP, and Criterium, Inc.

The advent of new immune checkpoint inhibitor combinations for urothelial carcinoma has yielded dramatic changes in patient care, according to Thomas W. Flaig, MD, vice chancellor for research at the University of Colorado Anschutz Medical Campus, Aurora.

Combination therapies involving enfortumab and nivolumab are demonstrating success in recent studies and have been incorporated into the latest guidelines, Dr. Flaig said in a presentation at the National Comprehensive Cancer Network (NCCN) annual conference.
 

What's New in The Updated Guidelines?

Advances in the treatment options for metastatic urothelial carcinoma in the last decade have been dramatic, with ongoing developments and new emerging treatment options, Dr. Flaig told the audience of his session.

This has led to the identification of new and effective immune checkpoint inhibitor combinations. Consequently, immune checkpoint inhibitors are currently included in all preferred/other recommended first-line treatment regimens, he said.

“Enfortumab vedotin plus pembrolizumab is now the sole preferred first-line regimen for locally advanced or metastatic disease.” Based on the recent research, the mindset regarding cisplatin-eligible patient selection may be changing, he added.

“We have used cisplatin eligibility as a key factor in determining first-line therapy for years, and that paradigm is now shifting with the emergence of enfortumab plus pembrolizumab, a new non–cisplatin containing regimen” Dr. Flaig noted.

Although the optimal choice for second- or third-line therapy after immune checkpoint inhibitors is not well-defined, options include platinum regimens, antibody-drug conjugate, and erdafitinib in eligible patients, he said.
 

Other Current Strategies for Localized Bladder Cancer Management

The incidence of bladder cancer has been stable for decades, with minimal therapeutic developments until the approval of immune checkpoint inhibitors in the last decade, Dr. Flaig said.

Bladder cancer is more common in older adults, with an average onset age of 73 years, and most patients (75%) are male, he said. Comorbid disease is common in these patients, and many have a history of smoking, Dr. Flaig added.

The traditional medical approach to treating bladder cancer has been based on combination therapies including cisplatin. This has also reflected the approach used in the treatment of lung cancer, historically, Dr. Flaig said.

Cisplatin, while effective, is a challenging therapy to administer and is not an option for all bladder cancer patients because of potential adverse effects, he noted. Antibody drug conjugates and immune checkpoint inhibitors are new alternatives for some who are not able to receive cisplatin.

What are the New Options for Treating Metastatic Urothelial Bladder Cancer?

The approval of antibody drug conjugates offers new treatment with a “specific target and therapeutic payload,” said Dr. Flaig in his presentation. Two antibody drug conjugates, enfortumab vedotin and sacituzumab govitecan, have been approved by the US Food and Drug Administration (FDA), he said. Enforumab vedotin was approved by the FDA in 2021 for adults with locally advanced or metastatic urothelial cancer for subsequent line therapy in select patients. In a 2021 study published in The New England Journal of Medicine, the primary outcome of overall response rate was significantly greater in patients with advanced urothelial carcinoma who were treated with enfortumab vedotin than in those treated with standard chemotherapy (overall response rate [ORR] 40.6% vs 17.9%, respectively).

Side effects associated with enfortumab vedotin “are intrinsic to the payload toxicity and the target distribution. Ideally, the target would be present on all of the cancer cells and none of the normal tissue,” said Dr. Flaig. With enfortumab, specific toxicities included neuropathy, skin reactions, and blood glucose elevation/diabetic ketoacidosis, he said.

A second agent, sacituzumab govitecan, was approved by the FDA for metastatic urothelial cancer patients in 2021, based on data from the TROPHY-U-O1 phase 2 open-label study of 113 individuals. In that study, the ORR was 27% at a median follow-up of 9.1 months. Adverse events included neutropenia, leukopenia, and diarrhea.
 

What Do the Latest Studies of Combination Therapy Show?

Immune checkpoint inhibitor combinations are significantly changing the landscape of bladder cancer treatment, Dr. Flaig explained.

A recent phase 3 study published in 2024 in The New England Journal of Medicine comparing enfortumab vedotin plus pembrolizumab to platinum-based combination chemotherapy showed an overall response rate of 67.7% vs 44.4% in favor of enfortumab/pembrolizumab, said Dr. Flaig. In addition, the risk of disease progression or death was approximately 55% lower in the enfortumab vedotin-pembrolizumab group vs the chemotherapy group (hazard ratio [HR], 0.45; P less than .001) and the median progression-free survival was approximately doubled (12.5 months vs 6.3 months).

Dr. Flaig described this study as “very notable”because “the enfortumab plus pembrolizumab arm was clearly more effective than the long-standing chemotherapy arm, now becoming the preferred, first-line treatment in the NCCN guidelines. Based on preliminary results of the study, this combination was approved by the FDA in 2023 for locally advanced or metastatic urothelial cancer patients regardless of their eligibility for cisplatin.

Another promising combination, nivolumab plus gemcitabine-cisplatin, was associated with significantly longer overall and progression-free survival in patients with previously untreated unresectable or metastatic urothelial carcinoma, Dr. Flaig said. The therapy was approved by the FDA in March 2024 for first-line therapy.

In a study of 608 patients published in The New England Journal of Medicine, median overall survival was 21.7 months for the nivolumab group vs 18.9 months for the gemcitabine-cisplatin alone group. The overall response rates were 57.6% in the nivolumab group vs 43.1% in the gemcitabine-cisplatin–alone group, and complete response rates were 21.7% and 11.8%, respectively. Serious adverse events (grade 3 or higher) were similar between the groups (61.8% and 51.7%, respectively).
 

What About Targeted Therapy?

Erdafitinib, a tyrosine kinase inhibitor of FGFR1–4, was approved by the FDA in January 2024 for adults with locally advanced or metastatic urothelial carcinoma who had susceptible FGFR3 genetic alterations, said Dr. Flaig, during his presentation. The limitation of this treatment to only those patients with an FGFR3 mutation is a recent update in its use, he noted.

“Up to 20% of patients with advanced urothelial carcinoma have FGFR alterations,” he said. In an open-label phase 2 study of 99 individuals with unresectable or metastatic urothelial carcinoma, past chemotherapy, and FGFR alterations, confirmed response to erdafitinib was 40% with a median overall survival of 13.8 months.

Dr. Flaig disclosed grant/research support from Agensys; Astellas Pharma US; AstraZeneca Pharmaceuticals LP; Bristol Myers Squibb; Genentech, Inc.; Janssen Pharmaceutica Products, LP; Merck & Co.; Sanofi-Aventis U.S.; and SeaGen. He also disclosed equity interest/stock options and intellectual property rights in Aurora Oncology, and serving as a consultant or scientific advisor for Janssen Pharmaceutica Product, LP, and Criterium, Inc.

TOPLINE: 

“Optimizing vaccination status should be considered a key element in the care of patients with cancer,” according to the authors of newly released American of Clinical Oncology (ASCO) guidelines. Optimizing vaccination status includes ensuring patients and household members receive recommended vaccines and adjusting this strategy depending on patients’ underlying immune status and their anticancer therapy.

METHODOLOGY: 

• “Infections are the second most common cause of noncancer-related mortality within the first year after a cancer diagnosis,” highlighting the need for oncologists to help ensure patients are up to date on key vaccines, an ASCO panel of experts wrote. 
• The expert panel reviewed the existing evidence and made recommendations to guide vaccination of adults with solid tumors or hematologic malignancies, including those who received hematopoietic stem-cell transplantation (HSCT), chimeric antigen T-cell (CAR T-cell) therapy and B-cell-depleting therapy, as well as guide vaccination of their household contacts. 
• The panel reviewed 102 publications, including 24 systematic reviews, 14 randomized controlled trials, and 64 nonrandomized studies. 
• Vaccines evaluated included those for COVID-19, influenza, hepatitis A and B, respiratory syncytial virus, Tdap, human papillomavirus, inactivated polio, and rabies. 
• The authors noted that patients’ underlying immune status and their cancer therapy could affect vaccination and revaccination strategies compared with recommendations for a general adult population without cancer. 

TAKEAWAY:

• The first step is to determine patients’ vaccination status and ensure adults newly diagnosed with cancer (as well as their household contacts) are up to date on seasonal and age or risk-based vaccines before starting their cancer treatment. If there are gaps, patients would ideally receive their vaccinations 2-4 weeks before their cancer treatment begins; however, non-live vaccines can be given during or after treatment. 
• The authors recommended complete revaccination of patients 6-12 months following HSCT to restore vaccine-induced immunity. The caveats: COVID-19, influenza, and pneumococcal vaccines can be given as early as 3 months after transplant, and patients should receive live and live attenuated vaccines only in the absence of active GVHD or immunosuppression and only ≥ 2 years following HSCT. 
• After CAR T-cell therapy directed against B-cell antigens (CD19/BCMA), patients should not receive influenza and COVID-19 vaccines sooner than 3 months after completing therapy and nonlive vaccines should not be given before 6 months. 
• After B-cell depleting therapy, revaccinate patients for COVID-19 only and no sooner than 6 months after completing treatment. Long-term survivors of hematologic cancer with or without active disease or those with long-standing B-cell dysfunction or hypogammaglobulinemia from therapy or B-cell lineage malignancies should receive the recommended nonlive vaccines. 
• Adults with solid and hematologic cancers traveling to an area of risk should follow the CDC standard recommendations for the destination. Hepatitis A, intramuscular typhoid vaccine, inactivated polio, hepatitis B, rabies, meningococcal, and nonlive Japanese encephalitis vaccines are safe. 

IN PRACTICE:

“Enhancing vaccine uptake against preventable illnesses will help the community and improve the quality of care for patients with cancer,” the authors said. “Clinicians play a critical role in helping the patient and caregiver to understand the potential benefits and risks of recommended vaccination[s]. In addition, clinicians should provide authoritative resources, such as fact-based vaccine informational handouts and Internet sites, to help patients and caregivers learn more about the topic.”

SOURCE:

Mini Kamboj, MD, with Memorial Sloan Kettering Cancer Center, New York City, and Elise Kohn, MD, with the National Cancer Institute, Rockville, Maryland, served as cochairs for the expert panel. The guideline was published March 18 in the Journal of Clinical Oncology.

LIMITATIONS:

The evidence for some vaccines in cancer patients continues to evolve, particularly for new vaccines like COVID-19 vaccines.

DISCLOSURES:

This research had no commercial funding. Disclosures for the guideline panel are available with the original article.

A version of this article appeared on Medscape.com.

TOPLINE: 

“Optimizing vaccination status should be considered a key element in the care of patients with cancer,” according to the authors of newly released American of Clinical Oncology (ASCO) guidelines. Optimizing vaccination status includes ensuring patients and household members receive recommended vaccines and adjusting this strategy depending on patients’ underlying immune status and their anticancer therapy.

METHODOLOGY: 

• “Infections are the second most common cause of noncancer-related mortality within the first year after a cancer diagnosis,” highlighting the need for oncologists to help ensure patients are up to date on key vaccines, an ASCO panel of experts wrote. 
• The expert panel reviewed the existing evidence and made recommendations to guide vaccination of adults with solid tumors or hematologic malignancies, including those who received hematopoietic stem-cell transplantation (HSCT), chimeric antigen T-cell (CAR T-cell) therapy and B-cell-depleting therapy, as well as guide vaccination of their household contacts. 
• The panel reviewed 102 publications, including 24 systematic reviews, 14 randomized controlled trials, and 64 nonrandomized studies. 
• Vaccines evaluated included those for COVID-19, influenza, hepatitis A and B, respiratory syncytial virus, Tdap, human papillomavirus, inactivated polio, and rabies. 
• The authors noted that patients’ underlying immune status and their cancer therapy could affect vaccination and revaccination strategies compared with recommendations for a general adult population without cancer. 

TAKEAWAY:

• The first step is to determine patients’ vaccination status and ensure adults newly diagnosed with cancer (as well as their household contacts) are up to date on seasonal and age or risk-based vaccines before starting their cancer treatment. If there are gaps, patients would ideally receive their vaccinations 2-4 weeks before their cancer treatment begins; however, non-live vaccines can be given during or after treatment. 
• The authors recommended complete revaccination of patients 6-12 months following HSCT to restore vaccine-induced immunity. The caveats: COVID-19, influenza, and pneumococcal vaccines can be given as early as 3 months after transplant, and patients should receive live and live attenuated vaccines only in the absence of active GVHD or immunosuppression and only ≥ 2 years following HSCT. 
• After CAR T-cell therapy directed against B-cell antigens (CD19/BCMA), patients should not receive influenza and COVID-19 vaccines sooner than 3 months after completing therapy and nonlive vaccines should not be given before 6 months. 
• After B-cell depleting therapy, revaccinate patients for COVID-19 only and no sooner than 6 months after completing treatment. Long-term survivors of hematologic cancer with or without active disease or those with long-standing B-cell dysfunction or hypogammaglobulinemia from therapy or B-cell lineage malignancies should receive the recommended nonlive vaccines. 
• Adults with solid and hematologic cancers traveling to an area of risk should follow the CDC standard recommendations for the destination. Hepatitis A, intramuscular typhoid vaccine, inactivated polio, hepatitis B, rabies, meningococcal, and nonlive Japanese encephalitis vaccines are safe. 

IN PRACTICE:

“Enhancing vaccine uptake against preventable illnesses will help the community and improve the quality of care for patients with cancer,” the authors said. “Clinicians play a critical role in helping the patient and caregiver to understand the potential benefits and risks of recommended vaccination[s]. In addition, clinicians should provide authoritative resources, such as fact-based vaccine informational handouts and Internet sites, to help patients and caregivers learn more about the topic.”

SOURCE:

Mini Kamboj, MD, with Memorial Sloan Kettering Cancer Center, New York City, and Elise Kohn, MD, with the National Cancer Institute, Rockville, Maryland, served as cochairs for the expert panel. The guideline was published March 18 in the Journal of Clinical Oncology.

LIMITATIONS:

The evidence for some vaccines in cancer patients continues to evolve, particularly for new vaccines like COVID-19 vaccines.

DISCLOSURES:

This research had no commercial funding. Disclosures for the guideline panel are available with the original article.

A version of this article appeared on Medscape.com.

TOPLINE: 

“Optimizing vaccination status should be considered a key element in the care of patients with cancer,” according to the authors of newly released American of Clinical Oncology (ASCO) guidelines. Optimizing vaccination status includes ensuring patients and household members receive recommended vaccines and adjusting this strategy depending on patients’ underlying immune status and their anticancer therapy.

METHODOLOGY: 

• “Infections are the second most common cause of noncancer-related mortality within the first year after a cancer diagnosis,” highlighting the need for oncologists to help ensure patients are up to date on key vaccines, an ASCO panel of experts wrote. 
• The expert panel reviewed the existing evidence and made recommendations to guide vaccination of adults with solid tumors or hematologic malignancies, including those who received hematopoietic stem-cell transplantation (HSCT), chimeric antigen T-cell (CAR T-cell) therapy and B-cell-depleting therapy, as well as guide vaccination of their household contacts. 
• The panel reviewed 102 publications, including 24 systematic reviews, 14 randomized controlled trials, and 64 nonrandomized studies. 
• Vaccines evaluated included those for COVID-19, influenza, hepatitis A and B, respiratory syncytial virus, Tdap, human papillomavirus, inactivated polio, and rabies. 
• The authors noted that patients’ underlying immune status and their cancer therapy could affect vaccination and revaccination strategies compared with recommendations for a general adult population without cancer. 

TAKEAWAY:

• The first step is to determine patients’ vaccination status and ensure adults newly diagnosed with cancer (as well as their household contacts) are up to date on seasonal and age or risk-based vaccines before starting their cancer treatment. If there are gaps, patients would ideally receive their vaccinations 2-4 weeks before their cancer treatment begins; however, non-live vaccines can be given during or after treatment. 
• The authors recommended complete revaccination of patients 6-12 months following HSCT to restore vaccine-induced immunity. The caveats: COVID-19, influenza, and pneumococcal vaccines can be given as early as 3 months after transplant, and patients should receive live and live attenuated vaccines only in the absence of active GVHD or immunosuppression and only ≥ 2 years following HSCT. 
• After CAR T-cell therapy directed against B-cell antigens (CD19/BCMA), patients should not receive influenza and COVID-19 vaccines sooner than 3 months after completing therapy and nonlive vaccines should not be given before 6 months. 
• After B-cell depleting therapy, revaccinate patients for COVID-19 only and no sooner than 6 months after completing treatment. Long-term survivors of hematologic cancer with or without active disease or those with long-standing B-cell dysfunction or hypogammaglobulinemia from therapy or B-cell lineage malignancies should receive the recommended nonlive vaccines. 
• Adults with solid and hematologic cancers traveling to an area of risk should follow the CDC standard recommendations for the destination. Hepatitis A, intramuscular typhoid vaccine, inactivated polio, hepatitis B, rabies, meningococcal, and nonlive Japanese encephalitis vaccines are safe. 

IN PRACTICE:

“Enhancing vaccine uptake against preventable illnesses will help the community and improve the quality of care for patients with cancer,” the authors said. “Clinicians play a critical role in helping the patient and caregiver to understand the potential benefits and risks of recommended vaccination[s]. In addition, clinicians should provide authoritative resources, such as fact-based vaccine informational handouts and Internet sites, to help patients and caregivers learn more about the topic.”

SOURCE:

Mini Kamboj, MD, with Memorial Sloan Kettering Cancer Center, New York City, and Elise Kohn, MD, with the National Cancer Institute, Rockville, Maryland, served as cochairs for the expert panel. The guideline was published March 18 in the Journal of Clinical Oncology.

LIMITATIONS:

The evidence for some vaccines in cancer patients continues to evolve, particularly for new vaccines like COVID-19 vaccines.

DISCLOSURES:

This research had no commercial funding. Disclosures for the guideline panel are available with the original article.

A version of this article appeared on Medscape.com.

An experimental therapeutic DNA vaccine against human papillomavirus type 16 (HPV16) was safe and well tolerated, and successfully cleared the virus in a majority of patients with HPV16-positive cervical intraepithelial neoplasia (CIN) 2 or 3 in a phase I trial.

The vaccine, pNGVL4a-CRTE6E7L2, also showed signs of efficacy in patients living with HIV, reported Kimberly Lynn Levinson, MD, MPH, associate professor of obstetrics and gynecology at Johns Hopkins Medicine in Baltimore.

“We demonstrated a 78% rate of clearance for both histologic regression and HPV16, with some clearance of other HPV types,” she said in an oral abstract presentation at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancer, held in San Diego.

Further evaluation of the vaccine in vulvar, vaginal, and other tissue types is required, and evaluation of immune response at the local and systemic is ongoing, Dr. Levinson said.

In contrast to HPV16 prophylactic vaccines, which form an antibody-specific response to HPV, therapeutic vaccines elicit a cell-mediated immunity, primarily focusing on the virus’ E6 and E7 proteins.

There are currently only three Food and Drug Administration–approved therapeutic vaccines for cancer, but none are as yet approved for treatment of gynecologic malignancies.

According to the US National Institutes of Health, there are multiple therapeutic HPV vaccines in development using either vector-based, peptide and protein-based, or nucleic-acid based approaches, or whole cell (dendritic cell) approaches.
 

Current Study

Dr. Levinson noted that “DNA vaccines are both well tolerated and simple to produce, and the addition of calreticulin enhances immune response.”

The investigational vaccine is delivered via an electoporation device (TriGrid delivery system) that stimulates muscle at the injection site to produce an enhanced immune response.

In preclinical studies the device was associated with an enhanced immune response compared with standard intramuscular injection. The enhance immune effect persisted despite CD4 T cell depletion.

The investigators conducted a phase 1 dose-escalation study, administering the vaccine to two separate cohorts: women without HIV who had HPV16-positive cervical dysplasia (CIN 2/3) and women living with HIV with HPV16-positive cervical or vulvovaginal dysplasia (CIN 2/3, VIN 2/3 or VAIN 2/3).

The vaccine was delivered at weeks 0, 4, and 8, at doses of 0.3 mg, 1.0 mg, or 3.0 mg. At week 12, all patients underwent site-specific biopsy to verify non-progression.

At 6 months, the patients then underwent definitive treatment with either loop electro excision or vulvar/vaginal excision. At 12 months, all patients had standard evaluations with biopsies.

Dr. Levinson reported results for the first 14 women enrolled, 10 of whom were HIV-negative and 4 of whom were HIV-positive.

Of nine women in the HIV-negative arm who had completed 6-month visits and were evaluable, two had HPV16 clearance by 2-month follow-up, and seven had clearance at 6 months. Other HPV subtypes cleared in two of five patients at 3 months and in three of five at 6 months.

In addition, seven of nine patients in this arm had histologic regression at 6 months.

In the HIV-positive arm, the two patients with CIN had no HPV16 clearance at 3 months, but both had clearance at 16 months. The vaccine did not clear other HPV subtypes in these patients, however.

Of the two women in this arm who had VIN, one had HPV16 clearance and histologic regression at 6 months. The other patient had neither viral clearance nor histologic regression.

All participants tolerated each vaccine well. Adverse events were all grade 1 in severity and resolved within 4 weeks. The most common event was tenderness at the injection site. There were also three cases of mild headache, two cases of drowsiness, and one of nausea.
 

What’s Next?

In the question-and-answer session following the presentation, Ronald D. Alvarez, MD, MBA, chairman and clinical service chief of obstetrics and gynecology at Vanderbilt University Medical Center in Nashville, Tennessee, asked Dr. Levinson how the vaccine development will proceed.

“Obviously, you have more data to collect and analyze, but how are you going to move forward with what looks like equal efficacy between the 1 milligram and the 3 milligram doses? Are you just going to go with the maximum tolerated dose, or consider a lower dose if it shows equal efficacy in terms of histologic regression as well as HPV clearance?” he asked.

“This is something we’re very interested in, and we do plan for the dose-expansion phase to go with the higher dose,” Dr. Levinson replied. “We need to evaluate it further and we may need to do further randomization between the medium dose and the highest dose to determine if there are differences both with systemic and local responses.”

Robert DeBernardo, MD, section head of obstetrics and gynecology and the Women’s Health Institute at the Cleveland Clinic, asked whether Dr. Levinson and colleagues were considering evaluating the vaccine in transplant recipients, “because we have a lot of persistent HPV in that subgroup.”

Dr. Levinson said that one of the dose-expansion cohorts for further study is a population of patients scheduled for transplantation.

“What we’re interested in is looking at whether we can ‘cure’ HPV prior to transplantation, and we think that’s going to be the best way to show that this vaccine potentially eliminates the virus, because if we can eliminate the virus and then take a population that’s going to be immunodeficient, then that would show that there’s no reactivation of the virus,” she said.

The study is supported by the National Institutes of Health. Dr. Levinson, Dr. Alvarez, and Dr. DeBernardo had no conflicts of interest to report.

An experimental therapeutic DNA vaccine against human papillomavirus type 16 (HPV16) was safe and well tolerated, and successfully cleared the virus in a majority of patients with HPV16-positive cervical intraepithelial neoplasia (CIN) 2 or 3 in a phase I trial.

The vaccine, pNGVL4a-CRTE6E7L2, also showed signs of efficacy in patients living with HIV, reported Kimberly Lynn Levinson, MD, MPH, associate professor of obstetrics and gynecology at Johns Hopkins Medicine in Baltimore.

“We demonstrated a 78% rate of clearance for both histologic regression and HPV16, with some clearance of other HPV types,” she said in an oral abstract presentation at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancer, held in San Diego.

Further evaluation of the vaccine in vulvar, vaginal, and other tissue types is required, and evaluation of immune response at the local and systemic is ongoing, Dr. Levinson said.

In contrast to HPV16 prophylactic vaccines, which form an antibody-specific response to HPV, therapeutic vaccines elicit a cell-mediated immunity, primarily focusing on the virus’ E6 and E7 proteins.

There are currently only three Food and Drug Administration–approved therapeutic vaccines for cancer, but none are as yet approved for treatment of gynecologic malignancies.

According to the US National Institutes of Health, there are multiple therapeutic HPV vaccines in development using either vector-based, peptide and protein-based, or nucleic-acid based approaches, or whole cell (dendritic cell) approaches.
 

Current Study

Dr. Levinson noted that “DNA vaccines are both well tolerated and simple to produce, and the addition of calreticulin enhances immune response.”

The investigational vaccine is delivered via an electoporation device (TriGrid delivery system) that stimulates muscle at the injection site to produce an enhanced immune response.

In preclinical studies the device was associated with an enhanced immune response compared with standard intramuscular injection. The enhance immune effect persisted despite CD4 T cell depletion.

The investigators conducted a phase 1 dose-escalation study, administering the vaccine to two separate cohorts: women without HIV who had HPV16-positive cervical dysplasia (CIN 2/3) and women living with HIV with HPV16-positive cervical or vulvovaginal dysplasia (CIN 2/3, VIN 2/3 or VAIN 2/3).

The vaccine was delivered at weeks 0, 4, and 8, at doses of 0.3 mg, 1.0 mg, or 3.0 mg. At week 12, all patients underwent site-specific biopsy to verify non-progression.

At 6 months, the patients then underwent definitive treatment with either loop electro excision or vulvar/vaginal excision. At 12 months, all patients had standard evaluations with biopsies.

Dr. Levinson reported results for the first 14 women enrolled, 10 of whom were HIV-negative and 4 of whom were HIV-positive.

Of nine women in the HIV-negative arm who had completed 6-month visits and were evaluable, two had HPV16 clearance by 2-month follow-up, and seven had clearance at 6 months. Other HPV subtypes cleared in two of five patients at 3 months and in three of five at 6 months.

In addition, seven of nine patients in this arm had histologic regression at 6 months.

In the HIV-positive arm, the two patients with CIN had no HPV16 clearance at 3 months, but both had clearance at 16 months. The vaccine did not clear other HPV subtypes in these patients, however.

Of the two women in this arm who had VIN, one had HPV16 clearance and histologic regression at 6 months. The other patient had neither viral clearance nor histologic regression.

All participants tolerated each vaccine well. Adverse events were all grade 1 in severity and resolved within 4 weeks. The most common event was tenderness at the injection site. There were also three cases of mild headache, two cases of drowsiness, and one of nausea.
 

What’s Next?

In the question-and-answer session following the presentation, Ronald D. Alvarez, MD, MBA, chairman and clinical service chief of obstetrics and gynecology at Vanderbilt University Medical Center in Nashville, Tennessee, asked Dr. Levinson how the vaccine development will proceed.

“Obviously, you have more data to collect and analyze, but how are you going to move forward with what looks like equal efficacy between the 1 milligram and the 3 milligram doses? Are you just going to go with the maximum tolerated dose, or consider a lower dose if it shows equal efficacy in terms of histologic regression as well as HPV clearance?” he asked.

“This is something we’re very interested in, and we do plan for the dose-expansion phase to go with the higher dose,” Dr. Levinson replied. “We need to evaluate it further and we may need to do further randomization between the medium dose and the highest dose to determine if there are differences both with systemic and local responses.”

Robert DeBernardo, MD, section head of obstetrics and gynecology and the Women’s Health Institute at the Cleveland Clinic, asked whether Dr. Levinson and colleagues were considering evaluating the vaccine in transplant recipients, “because we have a lot of persistent HPV in that subgroup.”

Dr. Levinson said that one of the dose-expansion cohorts for further study is a population of patients scheduled for transplantation.

“What we’re interested in is looking at whether we can ‘cure’ HPV prior to transplantation, and we think that’s going to be the best way to show that this vaccine potentially eliminates the virus, because if we can eliminate the virus and then take a population that’s going to be immunodeficient, then that would show that there’s no reactivation of the virus,” she said.

The study is supported by the National Institutes of Health. Dr. Levinson, Dr. Alvarez, and Dr. DeBernardo had no conflicts of interest to report.

An experimental therapeutic DNA vaccine against human papillomavirus type 16 (HPV16) was safe and well tolerated, and successfully cleared the virus in a majority of patients with HPV16-positive cervical intraepithelial neoplasia (CIN) 2 or 3 in a phase I trial.

The vaccine, pNGVL4a-CRTE6E7L2, also showed signs of efficacy in patients living with HIV, reported Kimberly Lynn Levinson, MD, MPH, associate professor of obstetrics and gynecology at Johns Hopkins Medicine in Baltimore.

“We demonstrated a 78% rate of clearance for both histologic regression and HPV16, with some clearance of other HPV types,” she said in an oral abstract presentation at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancer, held in San Diego.

Further evaluation of the vaccine in vulvar, vaginal, and other tissue types is required, and evaluation of immune response at the local and systemic is ongoing, Dr. Levinson said.

In contrast to HPV16 prophylactic vaccines, which form an antibody-specific response to HPV, therapeutic vaccines elicit a cell-mediated immunity, primarily focusing on the virus’ E6 and E7 proteins.

There are currently only three Food and Drug Administration–approved therapeutic vaccines for cancer, but none are as yet approved for treatment of gynecologic malignancies.

According to the US National Institutes of Health, there are multiple therapeutic HPV vaccines in development using either vector-based, peptide and protein-based, or nucleic-acid based approaches, or whole cell (dendritic cell) approaches.
 

Current Study

Dr. Levinson noted that “DNA vaccines are both well tolerated and simple to produce, and the addition of calreticulin enhances immune response.”

The investigational vaccine is delivered via an electoporation device (TriGrid delivery system) that stimulates muscle at the injection site to produce an enhanced immune response.

In preclinical studies the device was associated with an enhanced immune response compared with standard intramuscular injection. The enhance immune effect persisted despite CD4 T cell depletion.

The investigators conducted a phase 1 dose-escalation study, administering the vaccine to two separate cohorts: women without HIV who had HPV16-positive cervical dysplasia (CIN 2/3) and women living with HIV with HPV16-positive cervical or vulvovaginal dysplasia (CIN 2/3, VIN 2/3 or VAIN 2/3).

The vaccine was delivered at weeks 0, 4, and 8, at doses of 0.3 mg, 1.0 mg, or 3.0 mg. At week 12, all patients underwent site-specific biopsy to verify non-progression.

At 6 months, the patients then underwent definitive treatment with either loop electro excision or vulvar/vaginal excision. At 12 months, all patients had standard evaluations with biopsies.

Dr. Levinson reported results for the first 14 women enrolled, 10 of whom were HIV-negative and 4 of whom were HIV-positive.

Of nine women in the HIV-negative arm who had completed 6-month visits and were evaluable, two had HPV16 clearance by 2-month follow-up, and seven had clearance at 6 months. Other HPV subtypes cleared in two of five patients at 3 months and in three of five at 6 months.

In addition, seven of nine patients in this arm had histologic regression at 6 months.

In the HIV-positive arm, the two patients with CIN had no HPV16 clearance at 3 months, but both had clearance at 16 months. The vaccine did not clear other HPV subtypes in these patients, however.

Of the two women in this arm who had VIN, one had HPV16 clearance and histologic regression at 6 months. The other patient had neither viral clearance nor histologic regression.

All participants tolerated each vaccine well. Adverse events were all grade 1 in severity and resolved within 4 weeks. The most common event was tenderness at the injection site. There were also three cases of mild headache, two cases of drowsiness, and one of nausea.
 

What’s Next?

In the question-and-answer session following the presentation, Ronald D. Alvarez, MD, MBA, chairman and clinical service chief of obstetrics and gynecology at Vanderbilt University Medical Center in Nashville, Tennessee, asked Dr. Levinson how the vaccine development will proceed.

“Obviously, you have more data to collect and analyze, but how are you going to move forward with what looks like equal efficacy between the 1 milligram and the 3 milligram doses? Are you just going to go with the maximum tolerated dose, or consider a lower dose if it shows equal efficacy in terms of histologic regression as well as HPV clearance?” he asked.

“This is something we’re very interested in, and we do plan for the dose-expansion phase to go with the higher dose,” Dr. Levinson replied. “We need to evaluate it further and we may need to do further randomization between the medium dose and the highest dose to determine if there are differences both with systemic and local responses.”

Robert DeBernardo, MD, section head of obstetrics and gynecology and the Women’s Health Institute at the Cleveland Clinic, asked whether Dr. Levinson and colleagues were considering evaluating the vaccine in transplant recipients, “because we have a lot of persistent HPV in that subgroup.”

Dr. Levinson said that one of the dose-expansion cohorts for further study is a population of patients scheduled for transplantation.

“What we’re interested in is looking at whether we can ‘cure’ HPV prior to transplantation, and we think that’s going to be the best way to show that this vaccine potentially eliminates the virus, because if we can eliminate the virus and then take a population that’s going to be immunodeficient, then that would show that there’s no reactivation of the virus,” she said.

The study is supported by the National Institutes of Health. Dr. Levinson, Dr. Alvarez, and Dr. DeBernardo had no conflicts of interest to report.

Widely considered the father of cancer immunotherapy, Steven A. Rosenberg MD, PhD, FAACR, has spent nearly 50 years analyzing the link between patients’ immune reaction and their cancer response.

His pioneering research established interleukin-2 (IL-2) as the first U.S. Food and Drug Administration–approved cancer immunotherapy in 1992.

To recognize his trailblazing work and other achievements, the American Association for Cancer Research (AACR) will award Dr. Rosenberg with the 2024 AACR Award for Lifetime Achievement in Cancer Research at its annual meeting in April.

Rosenberg_Steven_A_MD_web.jpg

Dr. Rosenberg: I grew up in the Bronx. My parents both immigrated to the United States from Poland as teenagers.


As a young boy, did you always want to become a doctor?

Dr. Rosenberg: I think some defining moments on why I decided to go into medicine occurred when I was 6 or 7 years old. The second world war was over, and many of the horrors of the Holocaust became apparent to me. I was brought up as an Orthodox Jew. My parents were quite religious, and I remember postcards coming in one after another about relatives that had died in the death camps. That had a profound influence on me.


How did that experience impact your aspirations?

Dr. Rosenberg: It was an example to me of how evil certain people and groups can be toward one another. I decided at that point, that I wanted to do something good for people, and medicine seemed the most likely way to do that. But also, I was developing a broad scientific interest. I ended up at the Bronx High School of Science and knew that I not only wanted to practice the medicine of today, but I wanted to play a role in helping develop the medicine.


What led to your interest in cancer treatment?

Dr. Rosenberg: Well, as a medical student and resident, it became clear that the field of cancer needed major improvement. We had three major ways to treat cancer: surgery, radiation therapy, and chemotherapy. That could cure about half of the people [who] had cancer. But despite the best application of those three specialties, there were over 600,000 deaths from cancer each year in the United States alone. It was clear to me that new approaches were needed, and I became very interested in taking advantage of the body’s immune system as a source of information to try to make progress.


Were there patients who inspired your research?

Dr. Rosenberg: There were two patients that I saw early in my career that impressed me a great deal. One was a patient that I saw when working in the emergency ward as a resident. A patient came in with right upper quadrant pain that looked like a gallbladder attack. That’s what it was. But when I went through his chart, I saw that he had been at that hospital 12 years earlier with a metastatic gastric cancer. The surgeons had operated. They saw tumor had spread to the liver and could not be removed. They closed the belly, not expecting him to survive. Yet he kept showing up for follow-up visits.
Here he was 12 years later. When I helped operate to take out his gallbladder, there was no evidence of any cancer. The cancer had disappeared in the absence of any external treatment. One of the rarest events in medicine, the spontaneous regression of a cancer. Somehow his body had learned how to destroy the tumor.
 

Was the second patient’s case as impressive?

Dr. Rosenberg: This patient had received a kidney transplant from a gentleman who died in an auto accident. [The donor’s] kidney contained a cancer deposit, a kidney cancer, unbeknownst to the transplant surgeons. [When the kidney was transplanted], the recipient developed widespread metastatic kidney cancer.
[The recipient] was on immunosuppressive drugs, and so the drugs had to be stopped. [When the immunosuppressive drugs were stopped], the patient’s body rejected the kidney and his cancer disappeared.
That showed me that, in fact, if you could stimulate a strong enough immune reaction, in this case, an [allogeneic] reaction, against foreign tissues from a different individual, that you could make large vascularized, invasive cancers disappear based on immune reactivities. Those were clues that led me toward studying the immune system’s impact on cancer.


From there, how did your work evolve?

Dr. Rosenberg: As chief of the surgery branch at NIH, I began doing research. It was very difficult to manipulate immune cells in the laboratory. They wouldn’t stay alive. But I tried to study immune reactions in patients with cancer to see if there was such a thing as an immune reaction against the cancer. There was no such thing known at the time. There were no cancer antigens and no known immune reactions against the disease in the human.


Around this time, investigators were publishing studies about interleukin-2 (IL-2), or white blood cells known as leukocytes. How did interleukin-2 further your research?

Dr. Rosenberg: The advent of interleukin-2 enabled scientists to grow lymphocytes outside the body. [This] enabled us to grow t-lymphocytes, which are some of the major warriors of the immune system against foreign tissue. After [studying] 66 patients in which we studied interleukin-2 and cells that would develop from it, we finally saw a disappearance of melanoma in a patient that received interleukin-2. And we went on to treat hundreds of patients with that hormone, interleukin-2. In fact, interleukin-2 became the first immunotherapy ever approved by the Food and Drug Administration for the treatment of cancer in humans.

Dr. Rosenberg: [It] led to studies of the mechanism of action of interleukin-2 and to do that, we identified a kind of cell called a tumor infiltrating lymphocyte. What better place, intuitively to look for cells doing battle against the cancer than within the cancer itself?
In 1988, we demonstrated for the first time that transfer of lymphocytes with antitumor activity could cause the regression of melanoma. This was a living drug obtained from melanoma deposits that could be grown outside the body and then readministered to the patient under suitable conditions. Interestingly, [in February the FDA approved that drug as treatment for patients with melanoma]. A company developed it to the point where in multi-institutional studies, they reproduced our results.
And we’ve now emphasized the value of using T cell therapy, t cell transfer, for the treatment of patients with the common solid cancers, the cancers that start anywhere from the colon up through the intestine, the stomach, the pancreas, and the esophagus. Solid tumors such as ovarian cancer, uterine cancer and so on, are also potentially susceptible to this T cell therapy.
We’ve published several papers showing in isolated patients that you could cause major regressions, if not complete regressions, of these solid cancers in the liver, in the breast, the cervix, the colon. That’s a major aspect of what we’re doing now.
I think immunotherapy has come to be recognized as a major fourth arm that can be used to attack cancers, adding to surgery, radiation, and chemotherapy.


What guidance would you have for other physician-investigators or young doctors who want to follow in your path?

Dr. Rosenberg: You have to have a broad base of knowledge. You have to be willing to immerse yourself in a problem so that your mind is working on it when you’re doing things where you can only think. [When] you’re taking a shower, [or] waiting at a red light, your mind is working on this problem because you’re immersed in trying to understand it.
You need to have a laser focus on the goals that you have and not get sidetracked by issues that may be interesting but not directly related to the goals that you’re attempting to achieve.

Widely considered the father of cancer immunotherapy, Steven A. Rosenberg MD, PhD, FAACR, has spent nearly 50 years analyzing the link between patients’ immune reaction and their cancer response.

His pioneering research established interleukin-2 (IL-2) as the first U.S. Food and Drug Administration–approved cancer immunotherapy in 1992.

To recognize his trailblazing work and other achievements, the American Association for Cancer Research (AACR) will award Dr. Rosenberg with the 2024 AACR Award for Lifetime Achievement in Cancer Research at its annual meeting in April.

Rosenberg_Steven_A_MD_web.jpg

Dr. Rosenberg: I grew up in the Bronx. My parents both immigrated to the United States from Poland as teenagers.


As a young boy, did you always want to become a doctor?

Dr. Rosenberg: I think some defining moments on why I decided to go into medicine occurred when I was 6 or 7 years old. The second world war was over, and many of the horrors of the Holocaust became apparent to me. I was brought up as an Orthodox Jew. My parents were quite religious, and I remember postcards coming in one after another about relatives that had died in the death camps. That had a profound influence on me.


How did that experience impact your aspirations?

Dr. Rosenberg: It was an example to me of how evil certain people and groups can be toward one another. I decided at that point, that I wanted to do something good for people, and medicine seemed the most likely way to do that. But also, I was developing a broad scientific interest. I ended up at the Bronx High School of Science and knew that I not only wanted to practice the medicine of today, but I wanted to play a role in helping develop the medicine.


What led to your interest in cancer treatment?

Dr. Rosenberg: Well, as a medical student and resident, it became clear that the field of cancer needed major improvement. We had three major ways to treat cancer: surgery, radiation therapy, and chemotherapy. That could cure about half of the people [who] had cancer. But despite the best application of those three specialties, there were over 600,000 deaths from cancer each year in the United States alone. It was clear to me that new approaches were needed, and I became very interested in taking advantage of the body’s immune system as a source of information to try to make progress.


Were there patients who inspired your research?

Dr. Rosenberg: There were two patients that I saw early in my career that impressed me a great deal. One was a patient that I saw when working in the emergency ward as a resident. A patient came in with right upper quadrant pain that looked like a gallbladder attack. That’s what it was. But when I went through his chart, I saw that he had been at that hospital 12 years earlier with a metastatic gastric cancer. The surgeons had operated. They saw tumor had spread to the liver and could not be removed. They closed the belly, not expecting him to survive. Yet he kept showing up for follow-up visits.
Here he was 12 years later. When I helped operate to take out his gallbladder, there was no evidence of any cancer. The cancer had disappeared in the absence of any external treatment. One of the rarest events in medicine, the spontaneous regression of a cancer. Somehow his body had learned how to destroy the tumor.
 

Was the second patient’s case as impressive?

Dr. Rosenberg: This patient had received a kidney transplant from a gentleman who died in an auto accident. [The donor’s] kidney contained a cancer deposit, a kidney cancer, unbeknownst to the transplant surgeons. [When the kidney was transplanted], the recipient developed widespread metastatic kidney cancer.
[The recipient] was on immunosuppressive drugs, and so the drugs had to be stopped. [When the immunosuppressive drugs were stopped], the patient’s body rejected the kidney and his cancer disappeared.
That showed me that, in fact, if you could stimulate a strong enough immune reaction, in this case, an [allogeneic] reaction, against foreign tissues from a different individual, that you could make large vascularized, invasive cancers disappear based on immune reactivities. Those were clues that led me toward studying the immune system’s impact on cancer.


From there, how did your work evolve?

Dr. Rosenberg: As chief of the surgery branch at NIH, I began doing research. It was very difficult to manipulate immune cells in the laboratory. They wouldn’t stay alive. But I tried to study immune reactions in patients with cancer to see if there was such a thing as an immune reaction against the cancer. There was no such thing known at the time. There were no cancer antigens and no known immune reactions against the disease in the human.


Around this time, investigators were publishing studies about interleukin-2 (IL-2), or white blood cells known as leukocytes. How did interleukin-2 further your research?

Dr. Rosenberg: The advent of interleukin-2 enabled scientists to grow lymphocytes outside the body. [This] enabled us to grow t-lymphocytes, which are some of the major warriors of the immune system against foreign tissue. After [studying] 66 patients in which we studied interleukin-2 and cells that would develop from it, we finally saw a disappearance of melanoma in a patient that received interleukin-2. And we went on to treat hundreds of patients with that hormone, interleukin-2. In fact, interleukin-2 became the first immunotherapy ever approved by the Food and Drug Administration for the treatment of cancer in humans.

Dr. Rosenberg: [It] led to studies of the mechanism of action of interleukin-2 and to do that, we identified a kind of cell called a tumor infiltrating lymphocyte. What better place, intuitively to look for cells doing battle against the cancer than within the cancer itself?
In 1988, we demonstrated for the first time that transfer of lymphocytes with antitumor activity could cause the regression of melanoma. This was a living drug obtained from melanoma deposits that could be grown outside the body and then readministered to the patient under suitable conditions. Interestingly, [in February the FDA approved that drug as treatment for patients with melanoma]. A company developed it to the point where in multi-institutional studies, they reproduced our results.
And we’ve now emphasized the value of using T cell therapy, t cell transfer, for the treatment of patients with the common solid cancers, the cancers that start anywhere from the colon up through the intestine, the stomach, the pancreas, and the esophagus. Solid tumors such as ovarian cancer, uterine cancer and so on, are also potentially susceptible to this T cell therapy.
We’ve published several papers showing in isolated patients that you could cause major regressions, if not complete regressions, of these solid cancers in the liver, in the breast, the cervix, the colon. That’s a major aspect of what we’re doing now.
I think immunotherapy has come to be recognized as a major fourth arm that can be used to attack cancers, adding to surgery, radiation, and chemotherapy.


What guidance would you have for other physician-investigators or young doctors who want to follow in your path?

Dr. Rosenberg: You have to have a broad base of knowledge. You have to be willing to immerse yourself in a problem so that your mind is working on it when you’re doing things where you can only think. [When] you’re taking a shower, [or] waiting at a red light, your mind is working on this problem because you’re immersed in trying to understand it.
You need to have a laser focus on the goals that you have and not get sidetracked by issues that may be interesting but not directly related to the goals that you’re attempting to achieve.

Widely considered the father of cancer immunotherapy, Steven A. Rosenberg MD, PhD, FAACR, has spent nearly 50 years analyzing the link between patients’ immune reaction and their cancer response.

His pioneering research established interleukin-2 (IL-2) as the first U.S. Food and Drug Administration–approved cancer immunotherapy in 1992.

To recognize his trailblazing work and other achievements, the American Association for Cancer Research (AACR) will award Dr. Rosenberg with the 2024 AACR Award for Lifetime Achievement in Cancer Research at its annual meeting in April.

Rosenberg_Steven_A_MD_web.jpg

Dr. Rosenberg: I grew up in the Bronx. My parents both immigrated to the United States from Poland as teenagers.


As a young boy, did you always want to become a doctor?

Dr. Rosenberg: I think some defining moments on why I decided to go into medicine occurred when I was 6 or 7 years old. The second world war was over, and many of the horrors of the Holocaust became apparent to me. I was brought up as an Orthodox Jew. My parents were quite religious, and I remember postcards coming in one after another about relatives that had died in the death camps. That had a profound influence on me.


How did that experience impact your aspirations?

Dr. Rosenberg: It was an example to me of how evil certain people and groups can be toward one another. I decided at that point, that I wanted to do something good for people, and medicine seemed the most likely way to do that. But also, I was developing a broad scientific interest. I ended up at the Bronx High School of Science and knew that I not only wanted to practice the medicine of today, but I wanted to play a role in helping develop the medicine.


What led to your interest in cancer treatment?

Dr. Rosenberg: Well, as a medical student and resident, it became clear that the field of cancer needed major improvement. We had three major ways to treat cancer: surgery, radiation therapy, and chemotherapy. That could cure about half of the people [who] had cancer. But despite the best application of those three specialties, there were over 600,000 deaths from cancer each year in the United States alone. It was clear to me that new approaches were needed, and I became very interested in taking advantage of the body’s immune system as a source of information to try to make progress.


Were there patients who inspired your research?

Dr. Rosenberg: There were two patients that I saw early in my career that impressed me a great deal. One was a patient that I saw when working in the emergency ward as a resident. A patient came in with right upper quadrant pain that looked like a gallbladder attack. That’s what it was. But when I went through his chart, I saw that he had been at that hospital 12 years earlier with a metastatic gastric cancer. The surgeons had operated. They saw tumor had spread to the liver and could not be removed. They closed the belly, not expecting him to survive. Yet he kept showing up for follow-up visits.
Here he was 12 years later. When I helped operate to take out his gallbladder, there was no evidence of any cancer. The cancer had disappeared in the absence of any external treatment. One of the rarest events in medicine, the spontaneous regression of a cancer. Somehow his body had learned how to destroy the tumor.
 

Was the second patient’s case as impressive?

Dr. Rosenberg: This patient had received a kidney transplant from a gentleman who died in an auto accident. [The donor’s] kidney contained a cancer deposit, a kidney cancer, unbeknownst to the transplant surgeons. [When the kidney was transplanted], the recipient developed widespread metastatic kidney cancer.
[The recipient] was on immunosuppressive drugs, and so the drugs had to be stopped. [When the immunosuppressive drugs were stopped], the patient’s body rejected the kidney and his cancer disappeared.
That showed me that, in fact, if you could stimulate a strong enough immune reaction, in this case, an [allogeneic] reaction, against foreign tissues from a different individual, that you could make large vascularized, invasive cancers disappear based on immune reactivities. Those were clues that led me toward studying the immune system’s impact on cancer.


From there, how did your work evolve?

Dr. Rosenberg: As chief of the surgery branch at NIH, I began doing research. It was very difficult to manipulate immune cells in the laboratory. They wouldn’t stay alive. But I tried to study immune reactions in patients with cancer to see if there was such a thing as an immune reaction against the cancer. There was no such thing known at the time. There were no cancer antigens and no known immune reactions against the disease in the human.


Around this time, investigators were publishing studies about interleukin-2 (IL-2), or white blood cells known as leukocytes. How did interleukin-2 further your research?

Dr. Rosenberg: The advent of interleukin-2 enabled scientists to grow lymphocytes outside the body. [This] enabled us to grow t-lymphocytes, which are some of the major warriors of the immune system against foreign tissue. After [studying] 66 patients in which we studied interleukin-2 and cells that would develop from it, we finally saw a disappearance of melanoma in a patient that received interleukin-2. And we went on to treat hundreds of patients with that hormone, interleukin-2. In fact, interleukin-2 became the first immunotherapy ever approved by the Food and Drug Administration for the treatment of cancer in humans.

Dr. Rosenberg: [It] led to studies of the mechanism of action of interleukin-2 and to do that, we identified a kind of cell called a tumor infiltrating lymphocyte. What better place, intuitively to look for cells doing battle against the cancer than within the cancer itself?
In 1988, we demonstrated for the first time that transfer of lymphocytes with antitumor activity could cause the regression of melanoma. This was a living drug obtained from melanoma deposits that could be grown outside the body and then readministered to the patient under suitable conditions. Interestingly, [in February the FDA approved that drug as treatment for patients with melanoma]. A company developed it to the point where in multi-institutional studies, they reproduced our results.
And we’ve now emphasized the value of using T cell therapy, t cell transfer, for the treatment of patients with the common solid cancers, the cancers that start anywhere from the colon up through the intestine, the stomach, the pancreas, and the esophagus. Solid tumors such as ovarian cancer, uterine cancer and so on, are also potentially susceptible to this T cell therapy.
We’ve published several papers showing in isolated patients that you could cause major regressions, if not complete regressions, of these solid cancers in the liver, in the breast, the cervix, the colon. That’s a major aspect of what we’re doing now.
I think immunotherapy has come to be recognized as a major fourth arm that can be used to attack cancers, adding to surgery, radiation, and chemotherapy.


What guidance would you have for other physician-investigators or young doctors who want to follow in your path?

Dr. Rosenberg: You have to have a broad base of knowledge. You have to be willing to immerse yourself in a problem so that your mind is working on it when you’re doing things where you can only think. [When] you’re taking a shower, [or] waiting at a red light, your mind is working on this problem because you’re immersed in trying to understand it.
You need to have a laser focus on the goals that you have and not get sidetracked by issues that may be interesting but not directly related to the goals that you’re attempting to achieve.

Clinicians are navigating how to begin treating their patients with lifileucel (Amtagvi, Iovance Biotherapeutics Inc.), a new treatment for melanoma with a hefty price tag.

The US Food and Drug Administration (FDA) recently approved the tumor-infiltrating lymphocyte cell therapy (TIL) for use in certain adults with unresectable or metastatic melanoma. This marks the first time the FDA has allowed a cellular therapy to be marketed for a solid tumor cancer.

Lifileucel is made from a patient’s surgically removed tumor. Tissue from that tumor is then sent to a manufacturing center. Turnaround time to when the drug is ready to be sent back to the cancer center for use is approximately 34 days, according to the drug’s manufacturer, Iovance.
 

Insurance Adjustments

The cost of the one-time lifileucel treatment is $515,000, according to the manufacturer.

Two investigators in the clinical trials of lifileucel, Allison Betof Warner, MD, of Stanford University, Stanford, California, and Igor Puzanov, MD, of Roswell Park Comprehensive Cancer Center, Buffalo, New York, shared their expectations regarding factors that would contribute to how much a patient paid for the drug.

Given the drug’s recent approval, the logistical details are still being worked out between cancer centers and insurers regarding how much patients will pay out of pocket for lifileucel, said Dr. Betof Warner, who is assistant professor in the Department of Medicine, Division of Medical Oncology at Stanford University.

The associated costs, including the surgery that is needed to procure the TIL cells for expansion into the final drug product, will be different for each patient, she told this publication.

Patients’ costs for lifileucel will vary based on their insurance, explained Dr. Puzanov, chief of melanoma and professor of oncology at Roswell Park Comprehensive Cancer Center.

At Roswell Park, “we will work with our regionally-based payers on a case-by-case basis to seek approval for those patients we believe can most benefit from lifileucel,” he said in an interview. Preauthorization will be required, as is standard for many cancer treatments, he added.

Once payer approval is in place, Dr. Puzanov said, he did not anticipate significant delays in access for patients.

Certified centers such as the multidisciplinary team at Roswell Park are ready to treat patients now. Other centers are similarly prepared, especially those involved in the clinical trials of lifileucel, he said.

 

Logistics and Infrastructure

A position article and guidelines on the management of and best practices for TIL was published in the Journal for ImmunoTherapy of Cancer on February 29. The paper, of which both Dr. Betof Warner and Dr. Puzanov served as authors, noted that one of the barriers to the use of TIL cell therapy in clinical practice is the need for state-of-the art infrastructure at centers that want to offer the treatment. Scheduling, patient referrals, and surgery, as well as the production and infusion of TIL, must be organized and streamlined for successful treatment, the authors wrote.

The two supply chains involved in TIL — the transportation of the tumor tissue from the treatment center to the manufacturer and transport of the TIL infusion product back to the treatment center — must be timely and precise, they emphasized.
 

Docs Hope TIL Improves in Several Ways

Although the TIL technology is a breakthrough, “we hope to see even better efficacy and lower toxicity as further research looks at ways to improve on the current TIL standard,” Dr. Puzanov said.

More research and dose adjustments may impact patient costs and side effects, he noted. “I am looking to see TILs used in the front line, with or without checkpoint inhibitors.”

Research is needed to explore how to lower the chemotherapy doses and possibly the associated toxicity, he added. Finally, researchers must consider whether high-dose IL-2 therapy — given as part of the TIL cell therapy — could be replaced with other cytokines, or whether the number of doses could be lowered. Another avenue of exploration is engineering genes for cytokines into TILs, he said.

“The key is to think about TIL therapy before you need it — ideally, when the patient is still doing well on their frontline checkpoint inhibition immunotherapy,” Dr. Puzanov said in an interview. That is the time for evaluation, and specialty centers can provide an expert assessment, he said.

“We are constantly working to improve TIL therapy,” Dr. Betof Warner told this publication. More research is needed optimize the regimen to reduce side effects, which would not only make treatment easier for currently eligible patients, but might allow treatment for patients not currently eligible.

“For example, we are looking for ways to reduce the dose of preparative chemotherapy, which prepares the body for the cells to maximize their longevity and efficacy, and to reduce or eliminate the need to give IL-2 after the cell administration,” continued Dr. Betof Warner, who is also Director of Melanoma Medical Oncology, Director of Solid Tumor Cellular Therapy, and Codirector of the Pigmented Lesion and Melanoma Program at Stanford University. “We are also actively studying next-generation TIL therapies to try to increase the efficacy.”

“Lifileucel has about a 30% success rate for melanoma that has progressed after standard therapy; we are working hard to do better than that,” she noted.  

In a press release, Iovance summarized the results of the trial that supported the FDA’s accelerated approval of lifileucel. In an open-label single-arm study, including multiple sites worldwide, 73 adults with unresectable or metastatic melanoma who had received at least one previous systemic therapy underwent a lymphodepleting regimen followed by treatments with fludarabine and aldesleukin. Patients then received lifileucel at a median dose of 21.1 x 109 viable cells; the recommended dose ranges from 7.5 x 109 to 72 x 109 cells.

The primary efficacy outcome was objective response rate (ORR). The ORR in the study was 31.5%, and the median time to initial lifileucel response was 1.5 months.

The clinical trials of lifileucel for which Dr. Betof Warner and Dr. Puzanov served as investigators were sponsored by Iovance.

Clinicians are navigating how to begin treating their patients with lifileucel (Amtagvi, Iovance Biotherapeutics Inc.), a new treatment for melanoma with a hefty price tag.

The US Food and Drug Administration (FDA) recently approved the tumor-infiltrating lymphocyte cell therapy (TIL) for use in certain adults with unresectable or metastatic melanoma. This marks the first time the FDA has allowed a cellular therapy to be marketed for a solid tumor cancer.

Lifileucel is made from a patient’s surgically removed tumor. Tissue from that tumor is then sent to a manufacturing center. Turnaround time to when the drug is ready to be sent back to the cancer center for use is approximately 34 days, according to the drug’s manufacturer, Iovance.
 

Insurance Adjustments

The cost of the one-time lifileucel treatment is $515,000, according to the manufacturer.

Two investigators in the clinical trials of lifileucel, Allison Betof Warner, MD, of Stanford University, Stanford, California, and Igor Puzanov, MD, of Roswell Park Comprehensive Cancer Center, Buffalo, New York, shared their expectations regarding factors that would contribute to how much a patient paid for the drug.

Given the drug’s recent approval, the logistical details are still being worked out between cancer centers and insurers regarding how much patients will pay out of pocket for lifileucel, said Dr. Betof Warner, who is assistant professor in the Department of Medicine, Division of Medical Oncology at Stanford University.

The associated costs, including the surgery that is needed to procure the TIL cells for expansion into the final drug product, will be different for each patient, she told this publication.

Patients’ costs for lifileucel will vary based on their insurance, explained Dr. Puzanov, chief of melanoma and professor of oncology at Roswell Park Comprehensive Cancer Center.

At Roswell Park, “we will work with our regionally-based payers on a case-by-case basis to seek approval for those patients we believe can most benefit from lifileucel,” he said in an interview. Preauthorization will be required, as is standard for many cancer treatments, he added.

Once payer approval is in place, Dr. Puzanov said, he did not anticipate significant delays in access for patients.

Certified centers such as the multidisciplinary team at Roswell Park are ready to treat patients now. Other centers are similarly prepared, especially those involved in the clinical trials of lifileucel, he said.

 

Logistics and Infrastructure

A position article and guidelines on the management of and best practices for TIL was published in the Journal for ImmunoTherapy of Cancer on February 29. The paper, of which both Dr. Betof Warner and Dr. Puzanov served as authors, noted that one of the barriers to the use of TIL cell therapy in clinical practice is the need for state-of-the art infrastructure at centers that want to offer the treatment. Scheduling, patient referrals, and surgery, as well as the production and infusion of TIL, must be organized and streamlined for successful treatment, the authors wrote.

The two supply chains involved in TIL — the transportation of the tumor tissue from the treatment center to the manufacturer and transport of the TIL infusion product back to the treatment center — must be timely and precise, they emphasized.
 

Docs Hope TIL Improves in Several Ways

Although the TIL technology is a breakthrough, “we hope to see even better efficacy and lower toxicity as further research looks at ways to improve on the current TIL standard,” Dr. Puzanov said.

More research and dose adjustments may impact patient costs and side effects, he noted. “I am looking to see TILs used in the front line, with or without checkpoint inhibitors.”

Research is needed to explore how to lower the chemotherapy doses and possibly the associated toxicity, he added. Finally, researchers must consider whether high-dose IL-2 therapy — given as part of the TIL cell therapy — could be replaced with other cytokines, or whether the number of doses could be lowered. Another avenue of exploration is engineering genes for cytokines into TILs, he said.

“The key is to think about TIL therapy before you need it — ideally, when the patient is still doing well on their frontline checkpoint inhibition immunotherapy,” Dr. Puzanov said in an interview. That is the time for evaluation, and specialty centers can provide an expert assessment, he said.

“We are constantly working to improve TIL therapy,” Dr. Betof Warner told this publication. More research is needed optimize the regimen to reduce side effects, which would not only make treatment easier for currently eligible patients, but might allow treatment for patients not currently eligible.

“For example, we are looking for ways to reduce the dose of preparative chemotherapy, which prepares the body for the cells to maximize their longevity and efficacy, and to reduce or eliminate the need to give IL-2 after the cell administration,” continued Dr. Betof Warner, who is also Director of Melanoma Medical Oncology, Director of Solid Tumor Cellular Therapy, and Codirector of the Pigmented Lesion and Melanoma Program at Stanford University. “We are also actively studying next-generation TIL therapies to try to increase the efficacy.”

“Lifileucel has about a 30% success rate for melanoma that has progressed after standard therapy; we are working hard to do better than that,” she noted.  

In a press release, Iovance summarized the results of the trial that supported the FDA’s accelerated approval of lifileucel. In an open-label single-arm study, including multiple sites worldwide, 73 adults with unresectable or metastatic melanoma who had received at least one previous systemic therapy underwent a lymphodepleting regimen followed by treatments with fludarabine and aldesleukin. Patients then received lifileucel at a median dose of 21.1 x 109 viable cells; the recommended dose ranges from 7.5 x 109 to 72 x 109 cells.

The primary efficacy outcome was objective response rate (ORR). The ORR in the study was 31.5%, and the median time to initial lifileucel response was 1.5 months.

The clinical trials of lifileucel for which Dr. Betof Warner and Dr. Puzanov served as investigators were sponsored by Iovance.

Clinicians are navigating how to begin treating their patients with lifileucel (Amtagvi, Iovance Biotherapeutics Inc.), a new treatment for melanoma with a hefty price tag.

The US Food and Drug Administration (FDA) recently approved the tumor-infiltrating lymphocyte cell therapy (TIL) for use in certain adults with unresectable or metastatic melanoma. This marks the first time the FDA has allowed a cellular therapy to be marketed for a solid tumor cancer.

Lifileucel is made from a patient’s surgically removed tumor. Tissue from that tumor is then sent to a manufacturing center. Turnaround time to when the drug is ready to be sent back to the cancer center for use is approximately 34 days, according to the drug’s manufacturer, Iovance.
 

Insurance Adjustments

The cost of the one-time lifileucel treatment is $515,000, according to the manufacturer.

Two investigators in the clinical trials of lifileucel, Allison Betof Warner, MD, of Stanford University, Stanford, California, and Igor Puzanov, MD, of Roswell Park Comprehensive Cancer Center, Buffalo, New York, shared their expectations regarding factors that would contribute to how much a patient paid for the drug.

Given the drug’s recent approval, the logistical details are still being worked out between cancer centers and insurers regarding how much patients will pay out of pocket for lifileucel, said Dr. Betof Warner, who is assistant professor in the Department of Medicine, Division of Medical Oncology at Stanford University.

The associated costs, including the surgery that is needed to procure the TIL cells for expansion into the final drug product, will be different for each patient, she told this publication.

Patients’ costs for lifileucel will vary based on their insurance, explained Dr. Puzanov, chief of melanoma and professor of oncology at Roswell Park Comprehensive Cancer Center.

At Roswell Park, “we will work with our regionally-based payers on a case-by-case basis to seek approval for those patients we believe can most benefit from lifileucel,” he said in an interview. Preauthorization will be required, as is standard for many cancer treatments, he added.

Once payer approval is in place, Dr. Puzanov said, he did not anticipate significant delays in access for patients.

Certified centers such as the multidisciplinary team at Roswell Park are ready to treat patients now. Other centers are similarly prepared, especially those involved in the clinical trials of lifileucel, he said.

 

Logistics and Infrastructure

A position article and guidelines on the management of and best practices for TIL was published in the Journal for ImmunoTherapy of Cancer on February 29. The paper, of which both Dr. Betof Warner and Dr. Puzanov served as authors, noted that one of the barriers to the use of TIL cell therapy in clinical practice is the need for state-of-the art infrastructure at centers that want to offer the treatment. Scheduling, patient referrals, and surgery, as well as the production and infusion of TIL, must be organized and streamlined for successful treatment, the authors wrote.

The two supply chains involved in TIL — the transportation of the tumor tissue from the treatment center to the manufacturer and transport of the TIL infusion product back to the treatment center — must be timely and precise, they emphasized.
 

Docs Hope TIL Improves in Several Ways

Although the TIL technology is a breakthrough, “we hope to see even better efficacy and lower toxicity as further research looks at ways to improve on the current TIL standard,” Dr. Puzanov said.

More research and dose adjustments may impact patient costs and side effects, he noted. “I am looking to see TILs used in the front line, with or without checkpoint inhibitors.”

Research is needed to explore how to lower the chemotherapy doses and possibly the associated toxicity, he added. Finally, researchers must consider whether high-dose IL-2 therapy — given as part of the TIL cell therapy — could be replaced with other cytokines, or whether the number of doses could be lowered. Another avenue of exploration is engineering genes for cytokines into TILs, he said.

“The key is to think about TIL therapy before you need it — ideally, when the patient is still doing well on their frontline checkpoint inhibition immunotherapy,” Dr. Puzanov said in an interview. That is the time for evaluation, and specialty centers can provide an expert assessment, he said.

“We are constantly working to improve TIL therapy,” Dr. Betof Warner told this publication. More research is needed optimize the regimen to reduce side effects, which would not only make treatment easier for currently eligible patients, but might allow treatment for patients not currently eligible.

“For example, we are looking for ways to reduce the dose of preparative chemotherapy, which prepares the body for the cells to maximize their longevity and efficacy, and to reduce or eliminate the need to give IL-2 after the cell administration,” continued Dr. Betof Warner, who is also Director of Melanoma Medical Oncology, Director of Solid Tumor Cellular Therapy, and Codirector of the Pigmented Lesion and Melanoma Program at Stanford University. “We are also actively studying next-generation TIL therapies to try to increase the efficacy.”

“Lifileucel has about a 30% success rate for melanoma that has progressed after standard therapy; we are working hard to do better than that,” she noted.  

In a press release, Iovance summarized the results of the trial that supported the FDA’s accelerated approval of lifileucel. In an open-label single-arm study, including multiple sites worldwide, 73 adults with unresectable or metastatic melanoma who had received at least one previous systemic therapy underwent a lymphodepleting regimen followed by treatments with fludarabine and aldesleukin. Patients then received lifileucel at a median dose of 21.1 x 109 viable cells; the recommended dose ranges from 7.5 x 109 to 72 x 109 cells.

The primary efficacy outcome was objective response rate (ORR). The ORR in the study was 31.5%, and the median time to initial lifileucel response was 1.5 months.

The clinical trials of lifileucel for which Dr. Betof Warner and Dr. Puzanov served as investigators were sponsored by Iovance.

This article was originally published on February 10 in Eric Topol’s substack “Ground Truths.”

It’s astounding how devious cancer cells and tumor tissue can be. This week in Science we learned how certain lung cancer cells can function like “Catch Me If You Can” — changing their driver mutation and cell identity to escape targeted therapy. This histologic transformation, as seen in an experimental model, is just one of so many cancer tricks that we are learning about.

Recently, as shown by single-cell sequencing, cancer cells can steal the mitochondria from T cells, a double whammy that turbocharges cancer cells with the hijacked fuel supply and, at the same time, dismantles the immune response.

Last week, we saw how tumor cells can release a virus-like protein that unleashes a vicious autoimmune response.

And then there’s the finding that cancer cell spread predominantly is occurring while we sleep.

As I previously reviewed, the ability for cancer cells to hijack neurons and neural circuits is now well established, no less their ability to reprogram neurons to become adrenergic and stimulate tumor progression, and interfere with the immune response. Stay tuned on that for a new Ground Truths podcast with Prof Michelle Monje, a leader in cancer neuroscience, which will post soon.

Add advancing age’s immunosenescence as yet another challenge to the long and growing list of formidable ways that cancer cells, and the tumor microenvironment, evade our immune response.

An Ever-Expanding Armamentarium

All of this is telling us how we need to ramp up our game if we are going to be able to use our immune system to quash a cancer. Fortunately, we have abundant and ever-growing capabilities for doing just that.

Immune Checkpoint Inhibitors

The field of immunotherapies took off with the immune checkpoint inhibitors, first approved by the FDA in 2011, that take the brakes off of T cells, with the programmed death-1 (PD-1), PD-ligand1, and anti-CTLA-4 monoclonal antibodies.

But we’re clearly learning they are not enough to prevail over cancer with common recurrences, only short term success in most patients, with some notable exceptions. Adding other immune response strategies, such as a vaccine, or antibody-drug conjugates, or engineered T cells, are showing improved chances for success.

Therapeutic Cancer Vaccines

There are many therapeutic cancer vaccines in the works, as reviewed in depth here.

Here’s a list of ongoing clinical trials of cancer vaccines. You’ll note most of these are on top of a checkpoint inhibitor and use personalized neoantigens (cancer cell surface proteins) derived from sequencing (whole-exome or whole genome, RNA-sequencing and HLA-profiling) the patient’s tumor.

An example of positive findings is with the combination of an mRNA-nanoparticle vaccine with up to 34 personalized neoantigens and pembrolizumab (Keytruda) vs pembrolizumab alone in advanced melanoma after resection, with improved outcomes at 3-year follow-up, cutting death or relapse rate in half.

Antibody-Drug Conjugates (ADC)

There is considerable excitement about antibody-drug conjugates (ADC) whereby a linker is used to attach a chemotherapy agent to the checkpoint inhibitor antibody, specifically targeting the cancer cell and facilitating entry of the chemotherapy into the cell. Akin to these are bispecific antibodies (BiTEs, binding to a tumor antigen and T cell receptor simultaneously), both of these conjugates acting as “biologic” or “guided” missiles.

A very good example of the potency of an ADC was seen in a “HER2-low” breast cancer randomized trial. The absence or very low expression or amplification of the HER2 receptor is common in breast cancer and successful treatment has been elusive. A randomized trial of an ADC (trastuzumab deruxtecan) compared to physician’s choice therapy demonstrated a marked success for progression-free survival in HER2-low patients, which was characterized as “unheard-of success” by media coverage.

This strategy is being used to target some of the most difficult cancer driver mutations such as TP53 and KRAS.

Oncolytic Viruses

Modifying viruses to infect the tumor and make it more visible to the immune system, potentiating anti-tumor responses, known as oncolytic viruses, have been proposed as a way to rev up the immune response for a long time but without positive Phase 3 clinical trials.

After decades of failure, a recent trial in refractory bladder cancer showed marked success, along with others, summarized here, now providing very encouraging results. It looks like oncolytic viruses are on a comeback path.

Engineering T Cells (Chimeric Antigen Receptor [CAR-T])

As I recently reviewed, there are over 500 ongoing clinical trials to build on the success of the first CAR-T approval for leukemia 7 years ago. I won’t go through that all again here, but to reiterate most of the success to date has been in “liquid” blood (leukemia and lymphoma) cancer tumors. This week in Nature is the discovery of a T cell cancer mutation, a gene fusion CARD11-PIK3R3, from a T cell lymphoma that can potentially be used to augment CAR-T efficacy. It has pronounced and prolonged effects in the experimental model. Instead of 1 million cells needed for treatment, even 20,000 were enough to melt the tumor. This is a noteworthy discovery since CAR-T work to date has largely not exploited such naturally occurring mutations, while instead concentrating on those seen in the patient’s set of key tumor mutations.

As currently conceived, CAR-T, and what is being referred to more broadly as adoptive cell therapies, involves removing T cells from the patient’s body and engineering their activation, then reintroducing them back to the patient. This is laborious, technically difficult, and very expensive. Recently, the idea of achieving all of this via an injection of virus that specifically infects T cells and inserts the genes needed, was advanced by two biotech companies with preclinical results, one in non-human primates.

Gearing up to meet the challenge of solid tumor CAR-T intervention, there’s more work using CRISPR genome editing of T cell receptors. A.I. is increasingly being exploited to process the data from sequencing and identify optimal neoantigens.

Instead of just CAR-T, we’re seeing the emergence of CAR-macrophage and CAR-natural killer (NK) cells strategies, and rapidly expanding potential combinations of all the strategies I’ve mentioned. No less, there’s been maturation of on-off suicide switches programmed in, to limit cytokine release and promote safety of these interventions. Overall, major side effects of immunotherapies are not only cytokine release syndromes, but also include interstitial pneumonitis and neurotoxicity.

Summary

Given the multitude of ways cancer cells and tumor tissue can evade our immune response, durably successful treatment remains a daunting challenge. But the ingenuity of so many different approaches to unleash our immune response, and their combinations, provides considerable hope that we’ll increasingly meet the challenge in the years ahead. We have clearly learned that combining different immunotherapy strategies will be essential for many patients with the most resilient solid tumors.

Of concern, as noted by a recent editorial in The Lancet, entitled “Cancer Research Equity: Innovations For The Many, Not The Few,” is that these individualized, sophisticated strategies are not scalable; they will have limited reach and benefit. The movement towards “off the shelf” CAR-T and inexpensive, orally active checkpoint inhibitors may help mitigate this issue.

Notwithstanding this important concern, we’re seeing an array of diverse and potent immunotherapy strategies that are providing highly encouraging results, engendering more excitement than we’ve seen in this space for some time. These should propel substantial improvements in outcomes for patients in the years ahead. It can’t happen soon enough.

Thanks for reading this edition of Ground Truths. If you found it informative, please share it with your colleagues.

Dr. Topol has disclosed the following relevant financial relationships: Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for Dexcom; Illumina; Molecular Stethoscope; Quest Diagnostics; Blue Cross Blue Shield Association. Received research grant from National Institutes of Health.

A version of this article appeared on Medscape.com.

This article was originally published on February 10 in Eric Topol’s substack “Ground Truths.”

It’s astounding how devious cancer cells and tumor tissue can be. This week in Science we learned how certain lung cancer cells can function like “Catch Me If You Can” — changing their driver mutation and cell identity to escape targeted therapy. This histologic transformation, as seen in an experimental model, is just one of so many cancer tricks that we are learning about.

Recently, as shown by single-cell sequencing, cancer cells can steal the mitochondria from T cells, a double whammy that turbocharges cancer cells with the hijacked fuel supply and, at the same time, dismantles the immune response.

Last week, we saw how tumor cells can release a virus-like protein that unleashes a vicious autoimmune response.

And then there’s the finding that cancer cell spread predominantly is occurring while we sleep.

As I previously reviewed, the ability for cancer cells to hijack neurons and neural circuits is now well established, no less their ability to reprogram neurons to become adrenergic and stimulate tumor progression, and interfere with the immune response. Stay tuned on that for a new Ground Truths podcast with Prof Michelle Monje, a leader in cancer neuroscience, which will post soon.

Add advancing age’s immunosenescence as yet another challenge to the long and growing list of formidable ways that cancer cells, and the tumor microenvironment, evade our immune response.

An Ever-Expanding Armamentarium

All of this is telling us how we need to ramp up our game if we are going to be able to use our immune system to quash a cancer. Fortunately, we have abundant and ever-growing capabilities for doing just that.

Immune Checkpoint Inhibitors

The field of immunotherapies took off with the immune checkpoint inhibitors, first approved by the FDA in 2011, that take the brakes off of T cells, with the programmed death-1 (PD-1), PD-ligand1, and anti-CTLA-4 monoclonal antibodies.

But we’re clearly learning they are not enough to prevail over cancer with common recurrences, only short term success in most patients, with some notable exceptions. Adding other immune response strategies, such as a vaccine, or antibody-drug conjugates, or engineered T cells, are showing improved chances for success.

Therapeutic Cancer Vaccines

There are many therapeutic cancer vaccines in the works, as reviewed in depth here.

Here’s a list of ongoing clinical trials of cancer vaccines. You’ll note most of these are on top of a checkpoint inhibitor and use personalized neoantigens (cancer cell surface proteins) derived from sequencing (whole-exome or whole genome, RNA-sequencing and HLA-profiling) the patient’s tumor.

An example of positive findings is with the combination of an mRNA-nanoparticle vaccine with up to 34 personalized neoantigens and pembrolizumab (Keytruda) vs pembrolizumab alone in advanced melanoma after resection, with improved outcomes at 3-year follow-up, cutting death or relapse rate in half.

Antibody-Drug Conjugates (ADC)

There is considerable excitement about antibody-drug conjugates (ADC) whereby a linker is used to attach a chemotherapy agent to the checkpoint inhibitor antibody, specifically targeting the cancer cell and facilitating entry of the chemotherapy into the cell. Akin to these are bispecific antibodies (BiTEs, binding to a tumor antigen and T cell receptor simultaneously), both of these conjugates acting as “biologic” or “guided” missiles.

A very good example of the potency of an ADC was seen in a “HER2-low” breast cancer randomized trial. The absence or very low expression or amplification of the HER2 receptor is common in breast cancer and successful treatment has been elusive. A randomized trial of an ADC (trastuzumab deruxtecan) compared to physician’s choice therapy demonstrated a marked success for progression-free survival in HER2-low patients, which was characterized as “unheard-of success” by media coverage.

This strategy is being used to target some of the most difficult cancer driver mutations such as TP53 and KRAS.

Oncolytic Viruses

Modifying viruses to infect the tumor and make it more visible to the immune system, potentiating anti-tumor responses, known as oncolytic viruses, have been proposed as a way to rev up the immune response for a long time but without positive Phase 3 clinical trials.

After decades of failure, a recent trial in refractory bladder cancer showed marked success, along with others, summarized here, now providing very encouraging results. It looks like oncolytic viruses are on a comeback path.

Engineering T Cells (Chimeric Antigen Receptor [CAR-T])

As I recently reviewed, there are over 500 ongoing clinical trials to build on the success of the first CAR-T approval for leukemia 7 years ago. I won’t go through that all again here, but to reiterate most of the success to date has been in “liquid” blood (leukemia and lymphoma) cancer tumors. This week in Nature is the discovery of a T cell cancer mutation, a gene fusion CARD11-PIK3R3, from a T cell lymphoma that can potentially be used to augment CAR-T efficacy. It has pronounced and prolonged effects in the experimental model. Instead of 1 million cells needed for treatment, even 20,000 were enough to melt the tumor. This is a noteworthy discovery since CAR-T work to date has largely not exploited such naturally occurring mutations, while instead concentrating on those seen in the patient’s set of key tumor mutations.

As currently conceived, CAR-T, and what is being referred to more broadly as adoptive cell therapies, involves removing T cells from the patient’s body and engineering their activation, then reintroducing them back to the patient. This is laborious, technically difficult, and very expensive. Recently, the idea of achieving all of this via an injection of virus that specifically infects T cells and inserts the genes needed, was advanced by two biotech companies with preclinical results, one in non-human primates.

Gearing up to meet the challenge of solid tumor CAR-T intervention, there’s more work using CRISPR genome editing of T cell receptors. A.I. is increasingly being exploited to process the data from sequencing and identify optimal neoantigens.

Instead of just CAR-T, we’re seeing the emergence of CAR-macrophage and CAR-natural killer (NK) cells strategies, and rapidly expanding potential combinations of all the strategies I’ve mentioned. No less, there’s been maturation of on-off suicide switches programmed in, to limit cytokine release and promote safety of these interventions. Overall, major side effects of immunotherapies are not only cytokine release syndromes, but also include interstitial pneumonitis and neurotoxicity.

Summary

Given the multitude of ways cancer cells and tumor tissue can evade our immune response, durably successful treatment remains a daunting challenge. But the ingenuity of so many different approaches to unleash our immune response, and their combinations, provides considerable hope that we’ll increasingly meet the challenge in the years ahead. We have clearly learned that combining different immunotherapy strategies will be essential for many patients with the most resilient solid tumors.

Of concern, as noted by a recent editorial in The Lancet, entitled “Cancer Research Equity: Innovations For The Many, Not The Few,” is that these individualized, sophisticated strategies are not scalable; they will have limited reach and benefit. The movement towards “off the shelf” CAR-T and inexpensive, orally active checkpoint inhibitors may help mitigate this issue.

Notwithstanding this important concern, we’re seeing an array of diverse and potent immunotherapy strategies that are providing highly encouraging results, engendering more excitement than we’ve seen in this space for some time. These should propel substantial improvements in outcomes for patients in the years ahead. It can’t happen soon enough.

Thanks for reading this edition of Ground Truths. If you found it informative, please share it with your colleagues.

Dr. Topol has disclosed the following relevant financial relationships: Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for Dexcom; Illumina; Molecular Stethoscope; Quest Diagnostics; Blue Cross Blue Shield Association. Received research grant from National Institutes of Health.

A version of this article appeared on Medscape.com.

This article was originally published on February 10 in Eric Topol’s substack “Ground Truths.”

It’s astounding how devious cancer cells and tumor tissue can be. This week in Science we learned how certain lung cancer cells can function like “Catch Me If You Can” — changing their driver mutation and cell identity to escape targeted therapy. This histologic transformation, as seen in an experimental model, is just one of so many cancer tricks that we are learning about.

Recently, as shown by single-cell sequencing, cancer cells can steal the mitochondria from T cells, a double whammy that turbocharges cancer cells with the hijacked fuel supply and, at the same time, dismantles the immune response.

Last week, we saw how tumor cells can release a virus-like protein that unleashes a vicious autoimmune response.

And then there’s the finding that cancer cell spread predominantly is occurring while we sleep.

As I previously reviewed, the ability for cancer cells to hijack neurons and neural circuits is now well established, no less their ability to reprogram neurons to become adrenergic and stimulate tumor progression, and interfere with the immune response. Stay tuned on that for a new Ground Truths podcast with Prof Michelle Monje, a leader in cancer neuroscience, which will post soon.

Add advancing age’s immunosenescence as yet another challenge to the long and growing list of formidable ways that cancer cells, and the tumor microenvironment, evade our immune response.

An Ever-Expanding Armamentarium

All of this is telling us how we need to ramp up our game if we are going to be able to use our immune system to quash a cancer. Fortunately, we have abundant and ever-growing capabilities for doing just that.

Immune Checkpoint Inhibitors

The field of immunotherapies took off with the immune checkpoint inhibitors, first approved by the FDA in 2011, that take the brakes off of T cells, with the programmed death-1 (PD-1), PD-ligand1, and anti-CTLA-4 monoclonal antibodies.

But we’re clearly learning they are not enough to prevail over cancer with common recurrences, only short term success in most patients, with some notable exceptions. Adding other immune response strategies, such as a vaccine, or antibody-drug conjugates, or engineered T cells, are showing improved chances for success.

Therapeutic Cancer Vaccines

There are many therapeutic cancer vaccines in the works, as reviewed in depth here.

Here’s a list of ongoing clinical trials of cancer vaccines. You’ll note most of these are on top of a checkpoint inhibitor and use personalized neoantigens (cancer cell surface proteins) derived from sequencing (whole-exome or whole genome, RNA-sequencing and HLA-profiling) the patient’s tumor.

An example of positive findings is with the combination of an mRNA-nanoparticle vaccine with up to 34 personalized neoantigens and pembrolizumab (Keytruda) vs pembrolizumab alone in advanced melanoma after resection, with improved outcomes at 3-year follow-up, cutting death or relapse rate in half.

Antibody-Drug Conjugates (ADC)

There is considerable excitement about antibody-drug conjugates (ADC) whereby a linker is used to attach a chemotherapy agent to the checkpoint inhibitor antibody, specifically targeting the cancer cell and facilitating entry of the chemotherapy into the cell. Akin to these are bispecific antibodies (BiTEs, binding to a tumor antigen and T cell receptor simultaneously), both of these conjugates acting as “biologic” or “guided” missiles.

A very good example of the potency of an ADC was seen in a “HER2-low” breast cancer randomized trial. The absence or very low expression or amplification of the HER2 receptor is common in breast cancer and successful treatment has been elusive. A randomized trial of an ADC (trastuzumab deruxtecan) compared to physician’s choice therapy demonstrated a marked success for progression-free survival in HER2-low patients, which was characterized as “unheard-of success” by media coverage.

This strategy is being used to target some of the most difficult cancer driver mutations such as TP53 and KRAS.

Oncolytic Viruses

Modifying viruses to infect the tumor and make it more visible to the immune system, potentiating anti-tumor responses, known as oncolytic viruses, have been proposed as a way to rev up the immune response for a long time but without positive Phase 3 clinical trials.

After decades of failure, a recent trial in refractory bladder cancer showed marked success, along with others, summarized here, now providing very encouraging results. It looks like oncolytic viruses are on a comeback path.

Engineering T Cells (Chimeric Antigen Receptor [CAR-T])

As I recently reviewed, there are over 500 ongoing clinical trials to build on the success of the first CAR-T approval for leukemia 7 years ago. I won’t go through that all again here, but to reiterate most of the success to date has been in “liquid” blood (leukemia and lymphoma) cancer tumors. This week in Nature is the discovery of a T cell cancer mutation, a gene fusion CARD11-PIK3R3, from a T cell lymphoma that can potentially be used to augment CAR-T efficacy. It has pronounced and prolonged effects in the experimental model. Instead of 1 million cells needed for treatment, even 20,000 were enough to melt the tumor. This is a noteworthy discovery since CAR-T work to date has largely not exploited such naturally occurring mutations, while instead concentrating on those seen in the patient’s set of key tumor mutations.

As currently conceived, CAR-T, and what is being referred to more broadly as adoptive cell therapies, involves removing T cells from the patient’s body and engineering their activation, then reintroducing them back to the patient. This is laborious, technically difficult, and very expensive. Recently, the idea of achieving all of this via an injection of virus that specifically infects T cells and inserts the genes needed, was advanced by two biotech companies with preclinical results, one in non-human primates.

Gearing up to meet the challenge of solid tumor CAR-T intervention, there’s more work using CRISPR genome editing of T cell receptors. A.I. is increasingly being exploited to process the data from sequencing and identify optimal neoantigens.

Instead of just CAR-T, we’re seeing the emergence of CAR-macrophage and CAR-natural killer (NK) cells strategies, and rapidly expanding potential combinations of all the strategies I’ve mentioned. No less, there’s been maturation of on-off suicide switches programmed in, to limit cytokine release and promote safety of these interventions. Overall, major side effects of immunotherapies are not only cytokine release syndromes, but also include interstitial pneumonitis and neurotoxicity.

Summary

Given the multitude of ways cancer cells and tumor tissue can evade our immune response, durably successful treatment remains a daunting challenge. But the ingenuity of so many different approaches to unleash our immune response, and their combinations, provides considerable hope that we’ll increasingly meet the challenge in the years ahead. We have clearly learned that combining different immunotherapy strategies will be essential for many patients with the most resilient solid tumors.

Of concern, as noted by a recent editorial in The Lancet, entitled “Cancer Research Equity: Innovations For The Many, Not The Few,” is that these individualized, sophisticated strategies are not scalable; they will have limited reach and benefit. The movement towards “off the shelf” CAR-T and inexpensive, orally active checkpoint inhibitors may help mitigate this issue.

Notwithstanding this important concern, we’re seeing an array of diverse and potent immunotherapy strategies that are providing highly encouraging results, engendering more excitement than we’ve seen in this space for some time. These should propel substantial improvements in outcomes for patients in the years ahead. It can’t happen soon enough.

Thanks for reading this edition of Ground Truths. If you found it informative, please share it with your colleagues.

Dr. Topol has disclosed the following relevant financial relationships: Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for Dexcom; Illumina; Molecular Stethoscope; Quest Diagnostics; Blue Cross Blue Shield Association. Received research grant from National Institutes of Health.

A version of this article appeared on Medscape.com.