Document Detail

Antihypertensive effect of total flavone extracts from Puerariae Radix.
MedLine Citation:
PMID:  20933075     Owner:  NLM     Status:  In-Process    
AIM OF THE STUDY: To evaluate the antihypertensive effect of total flavone extracts from Puerariae Radix (FEPR). To explore the hemodynamic profiles and pertinent mechanism of the extracts.
MATERIALS AND METHODS: Acute and chronic antihypertensive effects of FEPR were examined in spontaneous hypertensive rats (SHRs) and reno-hypertensive rats (two kidneys one clip model, 2K1C). Anesthetized dogs were used to evaluate the hemodynamic effects of FEPR. The determination of angiotensin converting enzyme (ACE) activity in vitro and plasma renin activity (PRA) and endothelin (ET) in vivo were used to study the pilot mechanism of FEPR. Moreover, the toxicity study of FEPR was evaluated.
RESULTS: FEPR (100, 200 and 400 mg/kg, i.v.) notably reduced the blood pressure of SHRs in a short time period. A two-week administration of FEPR (45, 90 and 180 mg/kg, p.o.) decreased the blood pressure of both 2K1C rats and SHRs. The results of hemodynamic study in anesthetized dogs showed that, left ventricular end systolic pressure and left ventricular dP/dt(max) had shown no significant difference between FEPR-treated dogs and those from the control group, while the cerebral blood flow increased significantly in FEPR-treated groups. FEPR significantly inhibited the ACE activities in vitro dose dependently, and inhibited the PRA in vivo, while the content of ET showed no difference in the FEPR treated group comparing with the control group.
CONCLUSIONS: FEPR shows significantly blood pressure lowering and cerebral vascular resistance (CVR) decreasing effect, which can partly be explained by the involvement of the Renin-Angiotensin-System (RAS).
Run-Lan Cai; Meng Li; Su-Hua Xie; Yang Song; Zhong-Mei Zou; Chun-Yan Zhu; Yun Qi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-07
Journal Detail:
Title:  Journal of ethnopharmacology     Volume:  133     ISSN:  1872-7573     ISO Abbreviation:  J Ethnopharmacol     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7903310     Medline TA:  J Ethnopharmacol     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  177-83     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.
Institute of Medicinal Plant Development, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, PR China.
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