TGFB1 and renal fibrosis: The TGF‐β/Smad signalling pathway has been shown to significantly play a role in liver fibrosis pathogenesis and progression, and TGF‐β is considered an important cytokine in fibrosis progression and TGF‐β signalling blockage is confirmed to alleviate renal fibrosis in previously studied animal models [15, 16].