suggested the results of two separate studies presented during the late-breaking sessions at the European Academy of Dermatology and Venereology (EADV) 2024 Congress.
In the 24-week, phase 3 DELTA FORCE trial, topical delgocitinib was compared head to head with oral alitretinoin for managing chronic hand eczema (CHE). Results showed that greater improvements from baseline to week 12 in Hand Eczema Severity Index (HECSI) scores could be achieved with delgocitinib cream than with alitretinoin capsules.
And in another analysis, which involved patients with the atopic subtype of CHE only, the application of topical delgocitinib was found to be as good as treatment with subcutaneous dupilumab (Dupixent) at improving both HECSI scores and the Investigator Global Assessment for CHE response (IGA-CHE).
Potentially a ‘Highly Impactful’ Therapy
“Chronic hand eczema is a common yet burdensome skin condition that poses a considerable challenge for dermatologists. Diversity in morphologic presentation and clinical etiology has been a key limitation for the development of a safe, targeted, one-size-fits-all therapeutic approach,” Raj Chovatiya, MD, PhD, clinical associate professor at Chicago Medical School, Rosalind Franklin University of Medicine and Science, and the founder and director of the Center for Medical Dermatology and Immunology Research in Chicago, Illinois, said in an interview.
“These data show that delgocitinib cream is poised to be a novel and highly impactful topical therapy for the treatment of CHE,” said Chovatiya.
DELTA FORCE showed that the efficacy and safety of delgocitinib cream was “superior to alitretinoin, the only approved oral option for CHE,” he said. And the other study, a comparative analysis, showed that delgocitinib’s efficacy was “comparable to the biologic dupilumab specifically for the treatment of atopic hand eczema,” said Chovatiya, one of the authors of that study. He was not an author of the DELTA FORCE study.
DELTA FORCE
While it remains an investigational drug in the United States, where it is under Food and Drug Administration review for CHE, delgocitinib cream (Anzupgo) was recently approved by the European Commission for use in adults with moderate to severe hand eczema who do not respond to or who are unable to use topical corticosteroids. Approval was based on data from two phase 3 studies , DELTA 1 and DELTA 2, which compared delgocitinib cream against a cream vehicle, as well as an open-label, long-term extension study, DELTA 3.
In the DELTA FORCE study, 513 adults with severe CHE (IGA-CHE score of 4) were recruited at 102 clinical centers in Europe and North America and randomly allocated to topical treatment with delgocitinib cream, 20 mg/g applied twice daily, or alitretinoin capsules, 30 mg once daily. Treatment with delgocitinib was for 16 weeks, and treatment with alitretinoin was for 12 weeks. The latter’s dose could be reduced to 10 mg in the event of intolerability, and both treatments could be reintroduced if necessary, with a final follow-up at 24 weeks.
Study investigator Ana Maria Giménez-Arnau, MD, PhD, of the Hospital del Mar Research Institute, Pompeu Fabra University, Barcelona, Spain, who presented the findings, noted that alitretinoin (Toctino) is an oral systemic retinoid approved in a few European countries, Canada, Israel, and South Korea for the treatment of severe CHE.
The mean age of the participants was 45 years, almost two thirds were women, and the majority (93%) were White; 90% of patients had been recruited in Europe. The median duration of CHE was 4 years.
At baseline, the median HECSI score was recorded as 79.5 in the delgocitinib arm and 80.0 in the alitretinoin arm. At 12 weeks, the least squares mean change in HECSI score from baseline was –67.6 in the delgocitinib arm and –51.5 in the alitretinoin arm, giving a significant difference of –16.1 between the two groups (P < .001).
Giménez-Arnau reported that delgocitinib also outperformed alitretinoin for all other endpoints assessed, including the following: ≥ 90% improvement in HECSI (HECSI-90), IGA-CHE treatment success (defined as a score of 0/1 indicating clear/almost clear skin), changes in Hand Eczema Symptom Diary (HESD) itch and HESD pain scores, area under the curve for HECSI-90, change in Dermatology Life Quality Index score — which were all assessed at 12 weeks — and change in HECSI from baseline to week 24.
There was “significant improvement in the reduction of the HECSI from the first week” of treatment, Giménez-Arnau said at the meeting. Notably, that the effect increased to 12 weeks and then was sustained. A similar pattern was seen for IGA-CHE treatment success and for HESD pain. This is important as “chronic hand eczema is really painful,” she said.
As for safety, 49.4% of patients in the delgocitinib arm vs 76.1% of patients in the alitretinoin arm experienced any type of adverse event (AE). Serious AEs occurred in 2% and 4.9% of patients in each group, respectively, with fewer AEs leading to trial drug discontinuation observed in the delgocitinib arm (1.2% vs 10.1%). The proportion of AEs “probably or possibly” related to the trial drug was 9.5% in the delgocitinib group vs 54.3% in the alitretinoin group.