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RAW264.7 cells were treated with LPS (1.5 μg/ml)/IFN-γ (10 ng/ml) alone or together with each extract at concentrations indicated. After 24 h incubation, the culture media were collected for NO measurement using the Griess assay. The data were expressed as the means ± SD from six individual experiments. * P < 0.05,** P < 0.01,*** P < 0.001 compared to LPS/IFN-γ control.
