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标题：Effects of Ginkgo biloba Extract Feeding on Salt-Induced Hypertensive Dahl Rats
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作者：Yoko Kubota ; Naoko Tanaka ; Satomi Kagota 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：2006
卷号：29
期号：2
页码：266-269
DOI：10.1248/bpb.29.266
出版社：The Pharmaceutical Society of Japan
摘要：We previously demonstrated that Ginkgo biloba extract (GBE) produced vasodilation via the nitric oxide synthesis and release by increasing the intracellular calcium level in vascular endothelial cells of rats. The present study aimed to clarify the effects of dietary administration of GBE on the blood pressure and vascular tone of hypertensive Dahl salt-sensitive (Dahl) rats in order to evaluate its therapeutic actions and availability. Dahl rats were fed an 8.0% NaCl diet or an 8.0% NaCl plus 0.5% GBE diet for 24 d. The feeding of GBE did not change the heart rate, but significantly decreased systolic blood pressure. After 24 days' administration, the effects of GBE on the atria and aorta isolated from Dahl rats were examined. The GBE-containing diet did not affect the negative and positive actions of isolated atria that were produced by acetylcholine and isoproterenol, respectively. In the aortic preparations, the relaxation in response to acetylcholine was significantly potentiated by a GBE-containing diet. Sodium nitroprusside-induced relaxation was unchanged by GBE-containing diet. These results demonstrated that GBE reduced salt-related elevation of blood pressure and restored the impaired acetylcholine-induced vasodilation in aortic segments.
关键词：Ginkgo biloba extract (GBE);Dahl salt-sensitive rat;blood pressure;aorta;relaxation