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Four-week catechins ingestion significantly increased splenic mRNA expression of type I cytokine TNF-α (A), IFN-γ (B) and IL-2 (C), but had no effect on type II cytokine mRNA IL-4 (D), IL-5 (E), and IL-10 (F); * p < 0.05 vs. control group (0 mg/kg).
