+1 Recommend
1 collections
      • Record: found
      • Abstract: found
      • Article: found

      Involvement of Calcium in Cyclic Nucleotide Metabolism in Human Vascular Smooth Muscle

      Read this article at

          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.


          When cyclic nucleotide phosphodiesterase was purified from isolated smooth muscle layer of human aorta by DEAE-cellulose column chromatography, separated cyclic GMP phosphodiesterase activity was markedly stimulated in the presence of 10–20 µM of Ca<sup>2+</sup> by a protein modulator which has similar physico-chemical properties to troponin C. Synthetic compound, N-(6-aminohexyl)-5-chloro-1-naphthalenesulfonamide, which produced relaxations of arteries contracted by prostaglandin F<sub>2α</sub> or KCl was found to inhibit selectively this Ca<sup>2+</sup>-dependent cyclic GMP phosphodiesterase. This compound produced inhibition of superprecipitation of myosin B system obtained form mouse skeletal muscle and also inhibited adenosine triphosphatase activity of myosin B. Our data suggest that calcium is involved through a protein modulator in cyclic nucleotide metabolism of vascular smooth muscle and that the calcium-dependent protein modulator probably participates in the regulation of contractile response of vascular smooth muscle by affecting actomyosin ATPase activity.

          Related collections

          Author and article information

          J Vasc Res
          Journal of Vascular Research
          S. Karger AG
          18 September 2008
          : 15
          : 1-3
          : 55-64
          Department of Pharmacology, Faculty of Medicine, Kyoto University, Kyoto, and Department of Physiology, Institute for Developmental Research, Aichi Prefecture Colony, Aichi, Japan
          158153 Blood Vessels 1978;15:55–64
          © 1978 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: 10
          Molecular and Cellular Aspects of Vascular Smooth Muscle in Health and Disease


          Comment on this article