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Luteolin-induced vasorelaxation is partially inhibited by the eNOS inhibitor in rat aortic rings. After PE (1 μmol/L)-induced contraction of aortic rings reached the half maximum, incremental doses of luteolin were added to the incubation with or without the specific inhibitor of eNOS, L-NAME (300 μmol/L), and the tension of rings were measured. Data are mean ± SE obtained from three separate experiments. * P<0.05 vs. vehicle-treated control.
