Mice splenocytes were obtained as described previously (5 (link)). Both primary skin fibroblast-like cells (104) and SphCs (104) were cocultured for 72 h with 5×105 splenocytes activated with anti-CD3 antibody (1 mg/mL, eBioscience). A CellTrace Proliferation Kit (Thermo Fisher Scientific, USA) was used to evaluate T-CD4+ proliferation by staining with anti-CD4-APC. Cell media were harvested at 36 h, and cytokines were analyzed by FACS using a Cytometric Bead Array Mouse Th1/Th2/Th17 Cytokine Kit (BD Biosciences).
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