TGFB1 and idiopathic pulmonary fibrosis: Inhibition of Stat3 weakens the sensitivity of IPF patients to exogenous TGF-β1, further blocking the transformation of fibroblasts into myofibroblasts induced by TGF-β1 and the release of collagen from fibroblasts, improving two types of skin fibrosis mouse models [56, 57].