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Inhibitory effects of Morinda citrifolia leaves or fruits extract on NO production in LPS-stimulated RAW264 cells. Cells were treated with the extract of M. citrifolia (A) leaves or (B) fruit for 0.5 h before incubation with LPS (200 ng/mL). The indicated concentration shows the final concentration of the test samples incubated with LPS for 24 h. The level of NO in the culture medium was measured using the Griess reaction. Data are presented as mean ± SD (n = 4).
