In a bleomycin-induced mouse model of lung fibrosis [a model for idiopathic pulmonary fibrosis (IPF)], alveolar epithelial Fgf10 overexpression using transgenic mice significantly increased the infiltration of Cd4PosCd25PosFoxp3Pos T regulatory cells during the inflammation phase (Gupte et al., 2009). Here, FGF10 is linked to idiopathic pulmonary fibrosis.