Launched out of 5AM Ventures’ 4:59 Initiative, Renasant Bio Inc. has secured $54.5 million in seed funding to support development of treatments for autosomal dominant polycystic kidney disease (ADPKD), a genetic disease caused by mutations in the PKD1 and PKD2 genes, which encode polycystin proteins PC1 and PC2 that come together to form a calcium ion channel vital for kidney function.