Otsuka's Anti-APRIL Antibody (Voyxact/Sibeprenlimab) Receives FDA Approval for IgA Nephropathy (IgAN) on November 26, 2025 anti-APRIL antibody Approved IGA Glomerulonephritis Monoclonal Antibodies Otsuka Proteinuria Sibeprenlimab United States Food and Drug Administration Voyxact +