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Vol. 66, No. 4, 2001
Issue release date: May 2001
Section title: Original Paper
Urol Int 2001;66:205–211
(DOI:10.1159/000056616)

Intracellular Electrical Activity in Human Urinary Bladder Smooth Muscle: The Effect of High Sucrose Medium

Visser A.J. · van Mastrigt R.
Department of Urology-Urodynamics, Erasmus University Rotterdam, The Netherlands

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: 5/17/2001

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 1

ISSN: 0042-1138 (Print)
eISSN: 1423-0399 (Online)

For additional information: http://www.karger.com/UIN

Abstract

Introduction: The primary key to pharmacotherapy of bladder instability is in the excitation-contraction coupling of detrusor smooth muscle cells. To study this process, simultaneous recordings of mechanical and electrical activity are required. However, recording of mechanical activity induces movement, which may affect the quality of intracellular recordings. Materials and Methods: We therefore compared the electrical activity of human detrusor smooth muscle cells in normal Krebs’ solution and in a hypertonic solution, which immobilizes the tissue, enabling us to study the effect of movement on the membrane potential. Carbachol and KCl were applied to induce contractions. Results: Sucrose in the medium made the tissue rigid and abolished its movement, while the electrical response was not affected. When compared with recordings in normal Krebs’ solution, the average resting membrane potential was not altered. However, the membrane potential was more stable, with far less spike-shaped potentials. The spike-shaped potential amplitude was larger, while the duration was decreased. Conclusions: Impairing the ability of tissue movement resulted in changes in the electrophysiological properties of detrusor smooth muscle cells. The results suggest that stretch has an effect on L-type Ca2+ channels.


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: 5/17/2001

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 1

ISSN: 0042-1138 (Print)
eISSN: 1423-0399 (Online)

For additional information: http://www.karger.com/UIN


Copyright / Drug Dosage

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 or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
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 goverment 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.

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