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- W1904858831 abstract "The alternative activation of M2 macrophages in the lungs has been implicated as a causative agent in pulmonary fibrosis; however, the mechanisms underlying M2 polarization are poorly characterized. In this study, we investigated the role of the ubiquitously expressed Src homology domain-containing tyrosine phosphatase Shp2 in this process. Shp2 inactivation augmented IL-4-mediated M2 polarization in vitro, suggesting that Shp2 regulates macrophage skewing and prevents a bias toward the M2 phenotype. Conditional removal of Shp2 in monocytes/macrophages with lysozyme M promoter-driven Cre recombinase caused an IL-4-mediated shift toward M2 polarization. Additionally, an increase in arginase activity was detected in Shp2(∆/∆) mice after i.p. injection of chitin, whereas Shp2-deficient macrophages showed enhanced M2 polarization and protection against schistosome egg-induced schistosomiasis. Furthermore, mutants were more sensitive than control mice to bleomycin-induced inflammation and pulmonary fibrosis. Shp2 was associated with IL-4Rα and inhibited JAK1/STAT6 signaling through its phosphatase activity; loss of Shp2 promoted the association of JAK1 with IL-4Rα, which enhanced IL-4-mediated JAK1/STAT6 activation that resulted in M2 skewing. Taken together, these findings define a role for Shp2 in alveolar macrophages and reveal that Shp2 is required to inhibit the progression of M2-associated pulmonary fibrosis." @default.
- W1904858831 created "2016-06-24" @default.
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- W1904858831 date "2014-08-15" @default.
- W1904858831 modified "2023-10-16" @default.
- W1904858831 title "Myeloid-Specific Disruption of Tyrosine Phosphatase Shp2 Promotes Alternative Activation of Macrophages and Predisposes Mice to Pulmonary Fibrosis" @default.
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- W1904858831 doi "https://doi.org/10.4049/jimmunol.1303463" @default.
- W1904858831 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25127857" @default.
- W1904858831 hasPublicationYear "2014" @default.
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