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      Sirolimus Prevents Short-Term Renal Changes Induced by Ischemia-Reperfusion Injury in Rats

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          Abstract

          Background: Ischemia-reperfusion (I/R) is present at various degrees in kidney transplants. I/R plays a major role in early function and long-term survival of renal allograft. The purpose of our study was to determine if immunosuppressants modulate I/R in a model that separates I/R from all immune responses. Methods: Sprague-Dawley rats with monolateral renal I/R received daily cyclosporine (A), tacrolimus (B), sirolimus (C) or saline (D). Sham-operated rats received saline (E). After 30 days, glomerular filtration rate for each kidney was measured by inulin clearance. Kidney injury was examined, and TGF-β, fibronectin and metalloproteases were evaluated by real-time PCR, Western blot and zymography. Results: Sirolimus, but not cyclosporine and tacrolimus, prevented a glomerular filtration rate decrease in I/R kidneys (403 ± 303 vs. 1,006 ± 484 µl/min, p < 0.05; 126 ± 170 vs. 567 ± 374 µl/min, p < 0.05; 633 ± 293 vs. 786 ± 255; A, B and C group, respectively, I/R vs. contralateral kidneys). Sirolimus reduced ED-1+ cell infiltrate, interstitial fibrosis and intimal thickening of small vessels observed in I/R kidneys of controls and calcineurin inhibitor-treated rats. Tacrolimus and cyclosporine increased fibronectin and TGF-β expression and matrix deposition. Only sirolimus increased metalloprotease activity. Conclusions: Sirolimus but not calcineurin inhibitors prevented I/R-induced kidney injury.

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          Immunosuppressive drugs for kidney transplantation.

          Philip F Halloran (2004)
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            Ischemic acute renal failure: an inflammatory disease?

            Joseph V. Bonventre, Anna Zuk (2004)
            Inflammation plays a major role in the pathophysiology of acute renal failure resulting from ischemia. In this review, we discuss the contribution of endothelial and epithelial cells and leukocytes to this inflammatory response. The roles of cytokines/chemokines in the injury and recovery phase are reviewed. The ability of the mouse kidney to be protected by prior exposure to ischemia or urinary tract obstruction is discussed as a potential model to emulate as we search for pharmacologic agents that will serve to protect the kidney against injury. Understanding the inflammatory response prevalent in ischemic kidney injury will facilitate identification of molecular targets for therapeutic intervention.
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              Delayed graft function: risk factors and implications for renal allograft survival.

              A. Ojo, R Wolfe, P J Held … (1997)
              Delayed graft function (DGF) may be associated with diminished kidney allograft survival. We studied the risk factors that lead to nonimmediate function of a renal allograft and the consequences of DGF on short- and long-term renal transplant survival. Data from the U.S. Renal Data System were used to measure the relationships among cold ischemia time, delayed graft function, acute rejection, and graft survival in 37,216 primary cadaveric renal transplants (1985-1992). These relationships were investigated using the unconditional logistic and Cox multivariate regression methods. Cold ischemia time was strongly associated with DGF, with a 23% increase in the risk of DGF for every 6 hr of cold ischemia (P<0.001). Acute transplant rejection occurred more frequently in grafts with delayed function (37% vs. 20%; odds ratio=2.25, P=0.001). DGF was independently predictive of 5-year graft loss (relative risk=1.53, P<0.001). The presence of both early acute rejection and DGF portended a dismal 5-year graft survival rate of 35%. Zero-HLA mismatch conferred a 10-15% improvement in 1- and 5-year graft survival regardless of early functional status of the allograft. However, the 5-year graft survival rate in HLA-mismatched kidneys without DGF was significantly higher than that of zero-mismatched kidneys with DGF (63% vs. 51%; P<0.001). DGF independently portends a significant reduction in short- and long-term graft survival. Delayed function and early rejection episodes exerted an additive adverse effect on allograft survival. The deleterious impact of delayed function is comparatively more severe than that of poor HLA matching.
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                Author and article information

                Journal
                Journal ID (publisher-id): AJN
                Journal ID (nlm-ta): Am J Nephrol
                Journal ID (doi): 10.1159/issn.0250-8095
                Title: American Journal of Nephrology
                Publisher: S. Karger AG
                ISSN (Print): 0250-8095
                ISSN (Electronic): 1421-9670
                Publication date Subscription-year: 2011
                Publication date (Print): March 2011
                Publication date (Electronic): 28 February 2011
                Volume: 33
                Issue: 3
                Pages: 239-249
                Affiliations
                Units of aNephrology, Dialysis and Transplantation, bPathology and cBiochemistry, Policlinico San Matteo, University of Pavia, Pavia, Italy
                Author notes
                *Ciro Esposito, MD, Unit of Nephrology, University of Pavia, Fondazione IRCCS Policlinico San Matteo, Piazzale Golgi 2, IT–27110 Pavia (Italy), Tel. +39 0382 503 526, E-Mail espositociro56@live.it
                Article
                Publisher ID: 324577 Other ID: Am J Nephrol 2011;33:239–249
                DOI: 10.1159/000324577
                PubMed ID: 21358177
                SO-VID: 7fbe7f51-674a-4d20-9e3d-23dc9f8c6824
                Copyright © © 2011 S. Karger AG, Basel
                License:

                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
                Date received : 05 November 2010
                Date accepted : 24 January 2011
                Page count
                Figures: 8, Tables: 1, Pages: 11
                Categories
                Subject: Original Report: Laboratory Investigation

                ScienceOpen disciplines: Cardiovascular Medicine,Nephrology
                Keywords: Metalloprotease activity,Ischemia-reperfusion injury,Immunosuppressive drugs
                Data availability:
                ScienceOpen disciplines: Cardiovascular Medicine, Nephrology
                Keywords: Metalloprotease activity, Ischemia-reperfusion injury, Immunosuppressive drugs

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