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DH inhibits expression of IFN-γ and TNF-α in ConA-induced hepatitis. Notes: blood samples were collected from Control, DH-treated, ConA, and ConA+DH groups at 8, 16, and 24 hours after ConA injection. Serum levels of IFN-γ (a) and TNF-α (b) were detected by ELISA. Data is expressed as mean ± SD (n = 5; ∗∗ P < 0.01 and ∗∗∗ P < 0.001). ConA: Concanavalin A; DH: Dracocephalum heterophyllum; IFN-γ: interferon-γ; TNF-α: tumor necrosis factor; ELISA: enzyme-linked immunosorbent assay.
