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      Comparison of the Excitatory and Inhibitory Effects of Angiotensin and Vasopressin on Mammalian Portal Vein

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      Journal of Vascular Research

      S. Karger AG

      Portal vein, Angiotensin, Vasopressin, Membrane potential

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          Abstract

          Angiotensin produced inhibitory and excitatory responses in guinea pig portal vein and excitatory responses in rabbit and rat portal vein. Vasopressin produced inhibitory responses in guinea pig and rabbit portal vein and excitatory and inhibitory responses in rat portal vein. In guinea pig portal vein, inhibition by angiotensin and vasopressin was associated with an increase in membrane potential which was, on average, smaller than that produced by isoprenaline, and with a suppression of spike discharges. Tachyphylaxis of the responses to angiotensin and vasopressin in portal vein was not observed and their effects were unaffected by tetrodotoxin, atropine and phentolamine plus propranolol.

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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
          1976
          1976
          18 September 2008
          : 13
          : 6
          : 350-360
          Affiliations
          Department of Physiology, University of Marburg, Marburg/Lahn
          Article
          158105 Blood Vessels 1976;13:350–360
          10.1159/000158105
          © 1976 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: 11
          Categories
          Research Paper

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