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Effect of PM2.5 exposure on macrophage polarization. RAW264.7 cells were treated with 0, 5, 10, 25, 50, 100μg/ml PM2.5 for 24h. (A) Effect on cell viability detected by CCK-8 kit. (B-D) Effect on the mRNA expression of M1 markers quantified by qRT-PCR. (E-F) Effect on the mRNA expression of M2 markers quantified by qRT-PCR. ***p<0.001 versus control group.
