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      Regeneration Processes in the Kidney after Acute Injury: Role of Infiltrating Cells

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          Abstract

          The transient presence of infiltrated leukocytes in the kidney during acute renal failure as well as the location of these cells within the renal interstitium suggest their association with tubular injury and/or regeneration. To date, however, neither a positive nor a negative contribution of these cells to the pathophysiology of this disease could be unambiguously demonstrated. Ill-defined methods for identifying interstitial leukocytes have added to the controversy concerning the role of inflammatory cells in renal regeneration. The current literature survey presents a qualitative description of the renal interstitial accumulation of leukocytes as observed in some acute renal failure models, with special attention to those displaying acute tubular necrosis of particular nephron subsegments. We conclude that lethal or sublethal injury to renal tubular epithelial cells following toxic or ischemic insults leads to the manifestation of an interstitial mononuclear cell infiltrate. Whereas macrophages and T lymphocytes almost invariably take part, the former being the dominant cell population with respect to both magnitude and presence over time, polymorphonuclear cells seem to be significantly increased only in the case of pyelonephritis. Infiltrating cells have often been regarded rather harmful to the tissue, mainly due to the quite well understood injuring capacity of the latter. On the other hand, we speculate mononuclear leukocytes through their potential of producing different cytokines and growth factors (FGF, TGF-α, EGF-like, IL-2, etc.) might well play an initiating and mediating role in renal regeneration after acute tubular necrosis. Therefore, the role of infiltrating leukocytes in the injury/regeneration process during acute renal failure remains highly controversial and should be further elucidated.

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          Author and article information

          Journal
          EXN
          Nephron Exp Nephrol
          10.1159/issn.1660-2129
          Cardiorenal Medicine
          S. Karger AG
          1660-2129
          1998
          December 1998
          06 November 1998
          : 6
          : 6
          : 502-507
          Affiliations
          Department of Nephrology-Hypertension, University of Antwerp, Belgium
          Article
          20564 Exp Nephrol 1998;6:502–507
          10.1159/000020564
          958f8559-9296-49a6-929e-0d76865cb357
          © 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
          Figures: 1, Tables: 1, References: 26, Pages: 6
          Categories
          Minireview

          Cardiovascular Medicine,Nephrology
          Cytokines,Renal failure, regeneration,Infiltrating leukocytes

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