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      Glomerular Nonmuscle-Type Myosin Heavy-Chain Isoform Gene Expression in Glomerulosclerosis

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          Abstract

          This study was designed to assess how the glomerular expression of the nonmuscle-type myosin heavy-chain isoform, SMemb, is regulated in rats with focal glomerulosclerosis induced by puromycin aminonucleoside. SMemb was barely detectable in control glomeruli. On day 48 of focal glomerulosclerosis, SMemb was expressed in mesangial area and glomerular epithelial cells. When glomerulosclerosis became prominent on day 80, SMemb stained immunohistochemically in a focal segmental pattern in the sclerotic glomeruli. SMemb-expressing cells did not always express α-smooth muscle actin. In Northern blot analysis, SMemb mRNA was not detected in control glomeruli, whereas it was transiently upregulated in glomeruli on day 48 in rats with focal glomerulosclerosis. The mRNA levels of SMemb were thereafter gradually downregulated by day 80; however, they remained higher than those of control glomeruli. These data suggest that glomerular embryonic nonmuscle-type myosin heavy chain is abnormally regulated in glomerulosclerosis and that glomerulosclerosis may be associated with dedifferentiation of not only the mesangial cells, but also the other resident glomerular cells.

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          Author and article information

          Journal
          NEF
          Nephron
          10.1159/issn.1660-8151
          Nephron
          S. Karger AG
          1660-8151
          2235-3186
          1998
          July 1998
          22 June 1998
          : 79
          : 3
          : 317-321
          Affiliations
          Division of Nephrology, Department of Medicine, Koto Hospital, Tokyo,Department of Medicine, Juntendo University School of Medicine, Tokyo,2nd and 3rd Departments of Medicine, University of Tokyo, Japan
          Article
          45056 Nephron 1998;79:317–321
          10.1159/000045056
          9678433
          464f236c-7002-4569-b71f-6df54f15b8c0
          © 1998 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.

          History
          Page count
          Pages: 5
          Categories
          Original Paper

          Cardiovascular Medicine,Nephrology
          Mesangial cells,Nonmuscle-type myosin heavy-chain isoform,Glomerulosclerosis

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