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Candesartan inhibits sinoaortic denervation-induced cardiovascular hypertrophy in rats

Chao-Yu Miao1, He-Hui Xie, Jian-Jun Wang

  • 1Department of Pharmacology, Basic Medical College, Second Military Medical University, Shanghai 200433, China. cymiao@citiz.net

Acta Pharmacologica Sinica
|July 31, 2002
PubMed
Abstract

Insights

Candesartan effectively reduces cardiovascular hypertrophy in rats after sinoaortic denervation. This drug helps protect the heart and blood vessels by stabilizing blood pressure and increasing angiotensin II levels.

Area of Science:

  • Cardiovascular Physiology
  • Pharmacology
  • Hypertension Research

Background:

  • Sinoaortic denervation (SAD) in rats induces significant cardiovascular hypertrophy.
  • Understanding mechanisms to counteract SAD-induced cardiac and vascular changes is crucial.
  • AT1 receptor antagonists represent a potential therapeutic strategy.

Purpose of the Study:

  • To investigate the effects of candesartan cilexetil (candesartan) on sinoaortic denervation (SAD)-induced cardiovascular hypertrophy in rats.
  • To explore the potential mechanisms underlying candesartan's protective effects against cardiovascular remodeling.

Main Methods:

  • Long-term treatment: Rats received candesartan (6 mg/kg/d) in food for 16 weeks post-SAD.
  • Acute treatment: A single intragastric dose of candesartan (3 mg/kg) was administered 30 days after SAD.
  • Measurements included indexes of cardiac and aortic hypertrophy, myocardial fibrosis, vascular wall thickness, and plasma angiotensin II levels.

Main Results:

  • Candesartan significantly decreased left ventricular and aortic hypertrophy indexes in SAD rats.
  • The drug inhibited cardiomyocyte hypertrophy, myocardial fibrosis, arteriolar wall thickening, and elastin membrane destruction.
  • Increased plasma angiotensin II levels were observed and negatively correlated with hypertrophy indexes; blood pressure and its variability were reduced post-acute dosing.

Conclusions:

  • Candesartan effectively inhibits sinoaortic denervation-induced cardiovascular hypertrophy in rats.
  • Mechanisms may involve upregulation of circulating angiotensin II and blood pressure stabilization.
  • Candesartan demonstrates significant cardiovascular protective effects beyond known pathways.

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