Figure 5.

Effect of cumulative concentrations of A. wilhelmsii extract (0.5, 1, 2, 4 and 8 mg/ml) on rat aortic rings contracted with phenylephrine (PE) (10⁻⁶ M) after being pretreated with a guanylate cyclase inhibitor methylene blue (10^-5 M)(a) and K⁺ channel inhibitor, glibenclamide (10⁻⁵ M) and barium chloride (4 × 10⁻³ M)(b). Data are expressed as means ± S.E.M., using unpaired t-test (a) and one way ANOVA (b) (n = 7). +En: With endothelium, MB: Methylene blue, Gly: glibenclamide, BaCl₂: Barium chloride