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Effect of YYHs on TNF-α (a), IL-2 (b) and NO (c) production in LPS-induced RAW 264.7 cells. Cells were pretreated with YYHs (12.5–50 μg/mL) and LPS for 24 h and collected culture supernatant. The culture supernatant was detected to ELISA kits and Griess reagent, respectively. Compared with the control, #P < 0.05, ##P < 0.01. Compared with LPS group, *P < 0.05, **P < 0.01
