Core Insights - The updated KDIGO 2025 clinical practice guidelines for IgA Nephropathy emphasize the importance of achieving remission of proteinuria and slowing eGFR decline as key treatment goals [2][4] - FILSPARI (sparsentan) is highlighted as a first-line treatment option for IgA Nephropathy, demonstrating superior efficacy compared to traditional RASi therapies [3][4] Treatment Goals - The guidelines define remission of proteinuria as less than 0.5 g/day, ideally at less than 0.3 g/day, and emphasize the need to slow the decline of eGFR [2] - A treatment approach targeting both IgAN-induced nephron loss and IgA formation is recommended to meet these goals [2] FILSPARI's Role - FILSPARI is recognized as the only Dual Endothelin Angiotensin Receptor Antagonist (DEARA) and has shown proven efficacy in clinical trials, with more patients enrolled in the PROTECT study than in all prior RASi trials combined [3][4] - The PROTECT study demonstrated that patients receiving FILSPARI achieved a mean reduction in proteinuria of 49.8%, significantly higher than the 15.1% reduction seen in irbesartan-treated patients [7] Clinical Significance - The updated guidelines provide clarity for clinicians and patients, aiming to improve long-term kidney outcomes for those with IgA Nephropathy [4] - The inclusion of FILSPARI in the guidelines reflects its favorable benefit-risk profile and its role in reducing proteinuria and slowing kidney function loss [4][6] Company Background - CSL Vifor specializes in pharmaceuticals for iron deficiency and nephrology, focusing on strategic global partnerships and innovative therapies [8] - Travere Therapeutics is dedicated to developing treatments for rare diseases, emphasizing the urgent need for effective options in the IgA Nephropathy community [10]