DUSP1 and pulmonary fibrosis: The antifibrotic actions of MKP1 in lung fibroblasts in vitro (Figure 2) and its essential role in promoting fibrosis resolution in vivo (Figure 3) presented in this study further confirm the importance of MAPK regulation in pulmonary fibrosis and support the notion that MF dedifferentiation and clearance are necessary for fibrosis resolution.