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Kang, D.G. et al.

Effects of Cudrania tricuspidata water extract on blood pressure and renal functions in NO-dependent hypertension.

A pharmacological inhibition of nitric oxide synthase (NOS) in rats for 4-6 weeks produces renal vasoconstriction, renal dysfunction, and severe hypertension. The present study was aimed at investigating whether Cudrania tricuspidata (C. tricuspidata) water extract ameliorates N(G)-Nitro-L-arginine methylester (L-NAME)-induced hypertension. Treatment of L-NAME (60 mg/L drinking water, 4 weeks) causes a sustained increase in systolic blood pressure (SBP). The concentration of plasma NO metabolites and NO/cGMP productions in the vascular tissues of the L-NAME-treated group were significantly reduced as compared with those in the control. C. tricuspidata water extract blocked increase of SBP in the L-NAME-treated group and restored SBP to normal level. Futhermore, C. tricuspidata water extract was able to preserve the vascular NO/cGMP production and plasma NO metabolites concentration. However, there are no changes in the expression of ecNOS and iNOS of thoracic aorta among the rats of control, L-NAME-treated group, and L-NAME and C. tricuspidata water extract co-treated group. The urinary sodium level, urine volume, and creatinine clearance were significantly higher in rats co-treated with C. tricuspidata water extract and L-NAME than in L-NAME-treated group. Taken together, these results suggest that C tricuspidata water extract prevents the increase of SBP in the L-NAME-induced hypertension that may have been caused by enhanced generation of vascular NO/cGMP.[1]

References

Effects of Cudrania tricuspidata water extract on blood pressure and renal functions in NO-dependent hypertension. Kang, D.G., Hur, T.Y., Lee, G.M., Oh, H., Kwon, T.O., Sohn, E.J., Lee, H.S. Life Sci. (2002) [Pubmed]

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