IL6 and pulmonary fibrosis: In addition, prednisone was used as a positive control drug in this experiment, and it was found that it can inhibit the expression of collagen I and collagen II of bleomycin-induced pulmonary fibrosis to inhibit the secretion of collagen fibers; inhibit the expression of inflammatory factors such as IL-6 and profibrotic factors such as TGFβ1; and increase the content of antioxidants such as HYP to play an antifibrotic role.