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. 2021 May 11;18:108. doi: 10.1186/s12974-021-02156-5

Fig. 2.

Fig. 2

IL-9 activates the Notch1 pathway and promotes inflammatory cytokines production in astrocytes. Primary mouse astrocytes were incubated in a serum-free medium overnight followed by treating with IL-9 at the indicated time point. a The expression changes of GFAP, NICD, and p-STAT3 were analyzed by Western blot assay. b Immunofluorescent staining for GFAP (green), Notch1 (red), and nuclear staining of DAPI (blue) in cultured astrocytes with IL-9 treatment for 6 h. Scale bars, 50 μm. c The mRNA levels of IL-6, TNF-α, IP-10, and MCP-1 in astrocytes were detected using real-time PCR assay. d The secretion levels of IL-6, TNF-α, IP-10, and MCP-1 in the supernatant of astrocytes were measured by CBA assay. *p < 0.05, **p < 0.01 and ***p < 0.001 versus DMEM group (one-way ANOVA). The data are from three independent experiments and represented as the mean ± SEM