TGFB1 and Peritoneal Fibrosis: WT1-positive PMCs were found to gradually accumulate on the peritoneal surface in a mouse model of peritoneal fibrosis induced by sodium hypochlorite, high-glucose dialysis solution, or TGF-β1, whereas α-SMA-positive myofibroblasts were mainly derived from PDGF+ fibroblasts that produce collagen I in the sub-peritoneal region [126].