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FNDC5-MSCs‐Exo dramatically increased M2 macrophage polarization and decrease M1 macrophage polarization in vitro. a Western blot analysis of CD206 and CD11b in RAW264.7 cells with different treatments. Representative semi-quantification analysis of CD206 (b) and CD11b (c). Representative relative mRNA level of CXCL10 (d) and Arg 1 (e). Data are expressed as the means ± SEM; n = 5; *P < 0.05
