TGFB1 and renal fibrosis: Interestingly, Xu et al. recently found that Gan‐song Yin, a traditional Chinese medicine, can interfering with the secretion of exosomes by adipocytes and affecting the level of miR‐21‐5p in exosomes, thus promoting miR‐21‐5p to targeting inhibit TGF‐β1 and alleviate renal fibrosis caused by diabetic nephropathy.172