In vivo Study of Microvascular Wall Characteristics and Resting Control in Young and Mature Spontaneously Hypertensive Rats

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Abstract

This study was designed to determine if vessel wall hypertrophy and increased expression of sympathetic activity occur in the microcirculation during the development of hypertension. The cremaster muscle microvasculature of normal Wistar-Kyoto (WKY) and spontaneously hypertensive (SHR) rats was observed at age 5–7 weeks and 16–18 weeks. For age-matched WKY and SHR rats, the diameters, wall thicknesses and vessel wall cross-sectional areas for the majority of comparable types of arterioles were not significantly (p > 0.05) different. After denervation of the cremasteric muscle, the large and intermediate diameter arterioles of young WKY rats dilated significantly (p < 0.05) more than did comparable vessels of SHR rats. In contrast, the dilation of comparable types of arterioles in mature WKY and SHR rats following denervation was not significantly (p > 0.05) different. The results do not support either abnormal vessel wall hypertrophy, vasoconstriction or increased expression of sympathetic activity in SHR rats compared to WKY rats up to age 16–18 weeks.

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Author and article information

Journal

Journal ID (publisher-id): JVR

Journal ID (nlm-ta): J Vasc Res

Journal ID (doi): 10.1159/issn.1018-1172

Title: Journal of Vascular Research

Publisher: S. Karger AG

ISSN (Print): 1018-1172

ISSN (Electronic): 1423-0135

Publication date Subscription-year: 1978

Publication date (Print): 1978

Publication date (Electronic): 18 September 2008

Volume: 15

Issue: 5

Pages: 322-330

Affiliations

Department of Physiology, Indiana University School of Medicine, Indianapolis, Ind.

Article

Publisher ID: 158177 Other ID: Blood Vessels 1978;15:322–330

DOI: 10.1159/000158177

SO-VID: d9edec46-f018-4576-9feb-df4c5333b4f3

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Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

History

Date received : 19 September 1977

Date accepted : 26 November 1977

Page count

Pages: 9

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