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Effect of rhein on the production of MMPs after IAV infection determined by qRT-PCR (A) and ELISA (B) assays. The treatment of the blank control (BC), negative control (NC), positive control (PC), and rhein-treated groups (Rhein) was same with that of the “antioxidant assay”. The experiment was repeated five times and each experimental condition was performed in triplicate (n = 5). All data shown were mean ± SD. #P < 0.05 vs. the BC group, *P < 0.05 vs. the NC group.
