Treg expression of Gata3 plays a major role in controlling dermal fibrosis. Treg expression of Gata3 plays a major role in controlling dermal fibrosis.

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Treg expression of Gata3 plays a major role in controlling dermal fibrosis. Treg expression of Gata3 plays a major role in controlling dermal fibrosis. FoxP3CreERT2 or FoxP3CreERT2/Gata3fl/fl mice were treated with bleomycin (B) and tamoxifen (T) for 14 days. FoxP3CreERT2/Gata3fl/fl treated with PBS (no bleomycin or tamoxifen) were used as baseline controls. (A) Representative contour plots and flow cytometric quantification of GATA3 expression in skin CD4+ T cells on day 14. (B) Flow cytometric quantification of Tregs (live CD45+CD4+FoxP3+ cells) isolated from skin, SDLNs, and lungs on day 14. (C) Flow cytometric quantification of percent of cytokine (IL-17, IL-13, IL-4, and IFN-γ)–producing Teffs (live CD45+CD4+FoxP3−) after PMA/ionomycin stimulation for 4 hours from skin. (D) Fold change in the percentage of CD4+ TH subsets from skin and lung of bleomycin- and tamoxifen-treated FoxP3CreERT2/Gata3fl/fl mice versus FoxP3CreERT2 mice. (E) Percentage of neutrophils (CD45+MHCII−Ly6G+) and inflammatory macrophages (CD45+MHCII+CD11b+F4/80+Ly6C+). (F) Representative αSMA tissue staining of dorsal skin and histologic quantification of αSMA staining intensity on day 14. (G) Representative Masson’s trichrome staining and histologic quantification of collagen density. (H) Representative H&E staining and quantification of dermal thickness. Data are representative of two independent experiments, n = 4 to 7 per group, per experiment. Data are mean ± SEM. One-way ANOVA, *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001. Scale bars, 100 μm. Lokesh A. Kalekar et al. Sci. Immunol. 2019;4:eaaw2910 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works