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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Proapoptotic Bid is required for pulmonary fibrosis.

The molecular mechanisms of pulmonary fibrosis are poorly understood. Previous reports indicate that activation of TGF-beta1 is essential for the development of pulmonary fibrosis. Here, we report that the proapoptotic Bcl-2 family member Bid is required for the development of pulmonary fibrosis after the intratracheal instillation of bleomycin. Mice lacking Bid exhibited significantly less pulmonary fibrosis in response to bleomycin compared with WT mice. The attenuation in pulmonary fibrosis was observed despite similar levels of inflammation, lung injury, and active TGF-beta1 in bronchoalveolar lavage fluid 5 days after the administration of bleomycin in mice lacking Bid and in WT controls. Bleomycin induced similar levels cell death in vitro in alveolar epithelial cells isolated from WT and bid(-/-) mice. By contrast, alveolar epithelial cells from bid(-/-) mice were resistant to TGF-beta1-induced cell death. These results indicate that Bcl-2 family members are critical regulators for the development of pulmonary fibrosis downstream of TGF-beta1 activation.[1]


  1. Proapoptotic Bid is required for pulmonary fibrosis. Budinger, G.R., Mutlu, G.M., Eisenbart, J., Fuller, A.C., Bellmeyer, A.A., Baker, C.M., Wilson, M., Ridge, K., Barrett, T.A., Lee, V.Y., Chandel, N.S. Proc. Natl. Acad. Sci. U.S.A. (2006) [Pubmed]
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