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Bayer Starts Phase IIa Study for Treatment of Patients With Alport Syndrome

BERLIN, December 04, 2025--Bayer announced today initiation of a Phase IIa clinical trial with BAY 3401016, an investigational monoclonal antibody with potential to block a protein called Semaphorin 3A (Sema3A), which is thought to be involved in the progression of kidney damage in Alport Syndrome (AS), a rare genetic disorder. The first-in-patient study, ASSESS, is a randomized, double-blind, placebo-controlled, group-comparison trial (NCT07211685), with an extension phase, which will investiga

articleBayer AgDecember 4, 20257/company/bayer-ag-na/news/bayer-starts-phase-iia-study-for-treatment-of-patients-with-alport-syndrome
Bayer Starts Phase IIa Study for Treatment of Patients With Alport Syndrome

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Alport Syndromekidney functionBayerkidney damageOrphan Drug DesignationASSESSmonoclonal antibodyBAY