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VIDEO: Blinatumomab, inotuzumab reshape relapsed ALL treatment
Blinatumomab and inotuzumab have dramatically changed treatment for patients with acute lymphoblastic leukemia to prepare them for a stem cell...
The Food and Drug Administration has approved the antibody drug conjugate inotuzumab ozogamicin for the treatment of adults with relapsed or refractory B-cell precursor acute lymphoblastic leukemia (ALL).
The treatment, to be marketed by Pfizer as Besponsa, won approval based on the results of the INO-VATE ALL trial, which randomized 326 patients to receive either inotuzumab ozogamicin (164 patients) or a chemotherapy regimen of the investigator’s choice (162 patients). To be considered for inclusion in the trial, patients with Philadelphia chromosome–negative or –positive relapsed or refractory B-cell precursor ALL were required to have at least 5% bone marrow blasts and have received one or two induction chemotherapy regimens.
Adverse events that occurred in more than 20% of patients included thrombocytopenia, neutropenia, anemia, leukopenia, fatigue, hemorrhage, pyrexia, nausea, headache, febrile neutropenia, abdominal pain, and hyperbilirubinemia, as well as increases in gamma-glutamyltransferase and transaminases. Adverse events that led to discontinuation of treatment were infection, thrombocytopenia, hyperbilirubinemia, hemorrhage, and increases in transaminases.
Preliminary results were published in August 2016 (N Engl J Med. 2016;375:740-53).
Inotuzumab ozogamicin was granted orphan drug and breakthrough status, as well as priority review, by the FDA in February 2017.
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