TGFB1 and inflammatory bowel disease: The exosomes of DCs secreting TGF-β1 (sTGF-β1-exo) delay the development of IBD model mice, and the exosomes from DCs expressing membrane-associated TGF-β1 (mTGF-β1-exo) have stronger immunosuppressive activity than sTGF-β1-exo in vitro [83].