Travere Therapeutics Submits sNDA to FDA for Approval of FILSPARI® (sparsentan) for the Treatment of FSGS

Core Viewpoint - Travere Therapeutics has submitted a supplemental New Drug Application (sNDA) to the FDA for FILSPARI, aiming for it to be the first FDA-approved treatment for focal segmental glomerulosclerosis (FSGS), a rare kidney condition [1][2] Company Overview - Travere Therapeutics is focused on developing therapies for rare diseases, emphasizing the urgent need for effective treatment options for conditions like FSGS [2][8] - FILSPARI is currently approved for slowing kidney function decline in adults with IgA nephropathy and is a non-immunosuppressive oral medication [2][9] Clinical Studies - The sNDA submission is supported by results from the Phase 3 DUPLEX Study and the Phase 2 DUET Study, which are among the largest interventional studies in FSGS [1][6] - The DUPLEX Study achieved its interim endpoint with statistical significance at 36 weeks, showing significant proteinuria reduction and a lower rate of end-stage kidney disease compared to the active control [6][7] - The DUET Study demonstrated a greater than two-fold reduction in proteinuria compared to irbesartan, with a consistent safety profile across trials [7] Regulatory Process - The FDA has 60 days to determine whether to accept the sNDA for review, with an expected notice in the second quarter of 2025 [3] - The FDA has indicated that REMS monitoring for embryo-fetal toxicity is no longer necessary, and the company plans to submit a modification to the REMS [4] Disease Context - FSGS is a rare kidney disorder affecting over 40,000 patients in the U.S., characterized by progressive scarring of the kidney and leading to kidney failure [5] - There are currently no FDA-approved pharmacologic therapies for FSGS, highlighting the significance of FILSPARI's potential approval [5]