IL6 and Peritoneal Fibrosis: Nintedanib attenuates the expression of cytokines/chemokines, including TNF-α, IL-1β, and IL-6, monocyte chemoattractant protein-1 (MCP-1) and prevents the macrophages infiltration to the injured peritoneum in chlorhexidine gluconate (CG)-induced peritoneal fibrosis [19].