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Macrophage function as determined by PCR. Relative mRNA expression of pro-inflammatory TNF-α (a and b) and IL-1β (c and d) were detected by real-time PCR assay. GAPDH was used as the housekeeping gene. RPMI 1640 treatment alone was the control group. *P < 0.05 vs. m-ctr group, **P < 0.01 vs. m-ctr group.
