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Pharma Tech Outlook | Wednesday, July 07, 2021
Corbus Pharmaceuticals Holdings announces topline results from the Phase 3 DETERMINE study of lenabasum in adults with dermatomyositis, a rare and heterogeneous autoimmune disease.
FREMONT, CA: Corbus Pharmaceuticals Holdings, Inc. (Corbus or the Company), an immunology organization that develops advanced medicines to treat inflammation, fibrosis, metabolism, and immuno-oncology, has announced topline results from Phase 3 DETERMINE study of lenabasum in adults with dermatomyositis, a rare and heterogeneous autoimmune disease.
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Primary endpoint:
At Week 28, the study did not achieve its primary endpoint of the Total Improvement Score (TIS). Higher TIS levels indicate significantly greater progress. But at Week 28, the lenabasum 20 mg twice daily group accomplished a mean TIS of 28.3 compared to 26.7 for the control group, p = 0.1965. Standard background treatments were given to every individual, like the control group, with 89 percent of dosed subjects receiving at least one immunosuppressive or immunomodulating therapy. Additional pre-specified evaluations of the overall effect of lenabasum 20 mg twice daily on TIS against the control group until Week 52 disclosed a tendency of lenabasum benefit, nominal p = 0.0795.
"We are disappointed that the trial did not meet the primary endpoint of TIS at Week 28," said Barbara White, M.D., Chief Medical Officer and Head of Research at Corbus. "Nonetheless, we are encouraged by the results when the outcome is matched to the subtype of dermatomyositis in the study. We believe we see clinical activity of lenabasum 20 mg administered twice daily compared to the control group just receiving standard background treatments, with higher TIS scores in classic dermatomyositis subjects with muscle weakness and skin involvement and greater reduction in CDASI activity score in subjects with active skin disease but normal muscle strength. We thank the participants, investigators and clinical site study staff, and the patient advocacy community for their support of this study."
Victoria Werth, M.D., Professor of Dermatology and Medicine, University of Pennsylvania Perelman School of Medicine and Chief of Dermatology, Corporal Michael J. Crescenz VAMC, said, "I'm pleased by the improvement in CDASI activity scores seen in dermatomyositis patients with minimal active muscle disease in this study. It is difficult to conduct a large stand-alone study in just this small subtype of patients. In such a complex disease, seeing this subtype with refractory skin disease respond so well in this and the Phase 2 study is promising. These patients frequently have widespread disfiguring, symptomatic and refractory skin manifestations, and there is a need for new treatments, especially those that are not immunosuppressive. Our skin biomarker data from Phase 2 show reductions in inflammatory cytokines and T cells with lenabasum treatment compared to placebo, supporting improvement in skin disease in these patients. The improvement in TIS in subjects with muscle weakness is also interesting. It is clear to me that we have to look at the organs that are involved and use outcomes that correspond to those organs to detect change in dermatomyositis."
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