Biogen Phase 3 Trial Targets 36,000 Patients With Rare Kidney Disease, No Approved Treatments

Biogen (Nasdaq: BIIB) has initiated PROMINENT, a Phase 3 clinical study of felzartamab for treating primary membranous nephropathy (PMN). The study will evaluate the drug's efficacy and safety compared to tacrolimus in approximately 180 adults with PMN, with results expected in 2029.

PMN is a rare kidney disease affecting an estimated 36,000 patients in the U.S., with no currently approved treatments. Felzartamab, an investigational anti-CD38 monoclonal antibody, targets CD38+ cells, including plasma cells that produce harmful autoantibodies. Notably, up to 80% of PMN patients have autoantibodies against PLA2R generated by these cells.

The 104-week PROMINENT trial (NCT06962800) will measure complete remission rates of proteinuria at week 104 as its primary endpoint. Previous Phase 2 studies (M-PLACE and NewPLACE) showed promising results, with most patients experiencing reduced aPLA2R titers and improved proteinuria levels. This marks Biogen's third Phase 3 trial of felzartamab launched this year, alongside TRANSCEND for kidney transplant rejection and PREVAIL for IgA nephropathy.

https://www.stocktitan.net/news/BIIB/biogen-initiates-phase-3-study-of-felzartamab-for-the-treatment-of-k4b21sw9hd1g.html