TGFB1 and pulmonary fibrosis: Similarly, in the bleomycin-induced lung injury model of pulmonary fibrosis, inhibition or skewed activation of iNKT cells by sulfatide or αGalCer, respectively, leads to inhibition of vimentin concentration in lung tissues as well as reduction of fibrosis-promoting cytokines, including TGF-β, IL-5, and IL-13 (48, 49, 62).