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      Prolonged Cold Storage Abolishes Endothelium-Dependent Relaxing Responses to A23187 and Substance P in Porcine Coronary Arteries

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          Abstract

          In the presence of potassium (K<sup>+</sup>), A23187 and substance P elicited endothelium-dependent relaxations of porcine coronary arteries. Isoproterenol or hypoxia elicited endothelium-independent relaxations. Rubbing the artery potentiated the contractile response to a low K<sup>+</sup> concentration (15.4 ml). After intact arteries had been stored at 5 ° C for 3 days, K<sup>+</sup>-induced maximal tension was not affected, but contractile responses to 15 mM K<sup>+</sup> were potentiated with a decrease in ED<sub>50</sub>, suggesting that cold storage produces a supersensitivity to K<sup>+</sup>. Endothelium-dependent relaxations were abolished after 3 days of cold storage, while endothelium-independent relaxations were not inhibited. Cold storage of arteries with l-arginine (1 mM) for 3 days did not alter the relaxation responses to substance P and A23187, indicating that l-arginine does not prevent the loss of endothelium-dependent relaxation. Cold storage for 5 days inhibited the maximal tension to K<sup>+</sup> and abolished the supersensitivity. Scanning electron micrographs showed that endothelial cells can be damaged by prolonged cold storage. The changes in tension response of the artery were correlated with the time course of endothelial cell loss resulting from cold storage.

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          Author and article information

          Journal
          JVR
          J Vasc Res
          10.1159/issn.1018-1172
          Journal of Vascular Research
          S. Karger AG
          1018-1172
          1423-0135
          1992
          1992
          23 September 2008
          : 29
          : 2
          : 64-70
          Affiliations
          Department of Physiology and Biophysics, College of Medicine, University of Cincinnati, Ohio, USA National Institute for Minamata Disease, Minamata, Japan
          Article
          158934 J Vasc Res 1992;29:64–70
          10.1159/000158934
          1373958
          © 1992 S. Karger AG, Basel

          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.

          Page count
          Pages: 7
          Categories
          Research Paper

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