HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) All Versions of this Article: 291/1/H114    most recent 01116.2005v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Petersen, M. C. Articles by Greene, A. S. Search for Related Content PubMed PubMed Citation Articles by Petersen, M. C. Articles by Greene, A. S.

Angiotensin II infusion restores stimulated angiogenesis in the skeletal muscle of rats on a high-salt diet

Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin

Submitted 21 October 2005 ; accepted in final form 20 January 2006

Elevated dietary salt intake has previously been demonstrated to have dramatic effects on microvascular structure and function. The purpose of this study was to determine whether a high-salt diet modulates physiological angiogenesis in skeletal muscle. Male Sprague-Dawley rats were placed on a control diet (0.4% NaCl by weight) or a high-salt diet (4.0% NaCl) before implantation of a chronic electrical stimulator. After seven consecutive days of unilateral hindlimb muscle stimulation, animals on control diets demonstrated a significant increase in microvessel density in the tibialis anterior muscle of the stimulated hindlimb relative to the contralateral control leg. High salt-fed rats demonstrated a complete inhibition of this angiogenic response, as well as a significant reduction in plasma ANG II levels compared with those of control animals. To investigate the role of ANG II suppression on the inhibitory effect of high-salt diets, a group of rats that were fed high salt were chronically infused with ANG II at a low dose. Maintenance of ANG II levels restored stimulated angiogenesis to control levels in animals fed a high-salt diet. Western blot analysis indicated that inhibition of angiogenesis in high salt-fed rats was not due to changes in VEGF or VEGF receptor type 1 protein expression in response to stimulation; however, the degree to which VEGF receptor 2 protein increased with stimulation was significantly lower in high salt-fed animals. This study demonstrates an inhibitory effect of high salt intake on stimulated angiogenesis and suggests a critical role for ANG II suppression in mediating this antiangiogenic effect.

vascular endothelial growth factor; electrical stimulation

This article has been cited by other articles:

				M. M. de Resende, S. L. Amaral, C. Moreno, and A. S. Greene Congenic strains reveal the effect of the renin gene on skeletal muscle angiogenesis induced by electrical stimulation Physiol Genomics, October 8, 2008; 33(1): 33 - 40. [Abstract] [Full Text] [PDF]

				M. M. de Resende and A. S. Greene Effect of ANG II on endothelial cell apoptosis and survival and its impact on skeletal muscle angiogenesis after electrical stimulation Am J Physiol Heart Circ Physiol, June 1, 2008; 294(6): H2814 - H2821. [Abstract] [Full Text] [PDF]