TWIST2 and Peritoneal Fibrosis: In the present study, through an analysis of differential mRNA expression, we identified several upregulated genes associated with peritoneal fibrosis, including TWIST1, TWIST2, ZEB1, ZEB2, SNAI1, and SNAI2. Twist reportedly contributes to peritoneal fibrosis during PD treatment by regulating YB-1 [40].