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      Some Aspects of the Enzymic Inactivation of Sympathomimetic Amines

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          Abstract

          This review seeks to discuss the possible importance of monoamine oxidase (MAO) and semicarbazide-sensitive amine oxidase (SSAO) in terminating the effects of released sympathetic transmitters and in the inactivation of endogenous or administered sympathomimetic amines with particular reference to some aspects of the cardiovascular system. Use of in vitro preparations of blood vessels and of other smooth muscles, such as vas deferens and anococcygeus, has thrown light on possible roles for these deaminating enzymes, even in the inactivation of noradrenaline, while the new reversible inhibitors of MAO-A show promise as antidepressants with a reduced risk of hypertensive crises following the ingestion of tyramine-containing food. However, the role of SSAO in the inactivation of amines remains an enigma, even though much is now known of its biochemical nature. While the pharmacological responses to amine substrates can be potentiated by inhibition of SSAO, there is a suspicion that it is product rather than substrate that is more important.

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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
          978-3-8055-4659-1
          978-3-318-01830-1
          1018-1172
          1423-0135
          1987
          1987
          23 September 2008
          : 24
          : 5
          : 240-252
          Affiliations
          Department of Pharmacology, University of Cambridge, UK
          Article
          158700 Blood Vessels 1987;24:240–252
          10.1159/000158700
          © 1987 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: 13
          Categories
          Proceeding

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