THY1 and pulmonary fibrosis: As reported, Thy-1 null C57BL/6 mice were more prone to develop severe lung fibrosis after bleomycin treatment (Hagood, Prabhakaran et al., 2005), which could be a result of disrupted inhibitory coupling between Thy-1 and TGF-βRI (Koyama, Wang et al., 2017).