Cardiovascular and diuretic activity of kaurene derivatives of Xylopia aethiopica and Alepidea amatymbica.

Abstract:

:The extractives, crude and pure, of Alepidea amatymbica (AA) and Xylopia aethiopica (XA) were subjected to bioassay-directed phytochemical examination for potential cardiovascular and diuretic activity. All extractives and derivatives (XA/O, AA/1, xylopic acid, AA/3, AA/4, AA/5, AA/6, XA/1, XA/2, XA/3) displayed low toxicity, with LC(50) 0.5-5.0 ng/ml. For the first time, diterpene kaurenoids were reported to have significant systemic hypotensive and coronary vasodilatory effect accompanied with bradycardia. These effects were attributed to calcium antagonistic mechanism. The diuretic and natriuretic effects found were similar to the effects of chlorothiazide, suggesting inhibition of Na+ and K+ reabsorption in the early portion of the distal tubule. Further experiments are needed to elaborate the exact mechanisms of the hypotensive and diuretic effects of diterpene kaurenoids.

journal_name

J Ethnopharmacol

authors

Somova LI,Shode FO,Moodley K,Govender Y

doi

10.1016/s0378-8741(01)00285-9

keywords:

subject

Has Abstract

pub_date

2001-10-01 00:00:00

pages

165-74

issue

2-3

eissn

0378-8741

issn

1872-7573

pii

S0378874101002859

journal_volume

77

pub_type

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