TGFB1 and pulmonary fibrosis: Mannosylated albumin nanoparticles loaded with TGF-β1-siRNA specifically bind to the mannosylated receptor CD206 on the surface of M2 macrophages which silences the expression of TGF-β1 and significantly alleviate bleomycin-induced pulmonary fibrosis in mice (Singh et al., 2022).