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      Soluble Endothelial Protein C Receptor: Influence on Arteriovenous Fistula Thrombosis Development in Hemodialysis Patients

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          Abstract

          Background/Aims: Arteriovenous fistulae (AVF) thrombosis is a common cause of morbidity in hemodialysis (HD) patients. Increased soluble endothelial protein C receptor (sEPCR) levels have been associated with increased risk of venous thrombosis. We aimed to investigate the possible effects of sEPCR levels on the development of AVF thrombosis in adult HD patients. Methods: 60 HD patients and 22 healthy controls were included. Patients were followed for 18 months and were divided into two groups according to AVF thrombosis development: group 1 (with thrombosis) and group 2 (without thrombosis). Also, patients classified into tertiles according to plasma sEPCR levels: lowest, intermediate, and highest. Groups were analyzed for any relationship between sEPCR levels and development of AVF thrombosis. Results: Mean plasma sEPCR levels were significantly higher in HD patients than they were in controls. Group 1 patients had significantly higher sEPCR levels compared with group 2 patients. Patients’ groups were similar regarding other possible risk factors for AVF thromboses. The rate of AVF thrombosis development was significantly higher in the highest sEPCR tertile. Conclusion: This is the first study to analyze sEPCR levels in HD patients. Our findings demonstrate a relationship between plasma sEPCR levels and development of AVF thromboses.

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          Inflammation and thrombosis.

          Systemic inflammation is a potent prothrombotic stimulus. Inflammatory mechanisms upregulate procoagulant factors, downregulate natural anticoagulants and inhibit fibrinolytic activity. In addition to modulating plasma coagulation mechanisms, inflammatory mediators appear to increase platelet reactivity. In vivo, however, natural anticoagulants not only prevent thrombosis, but they also dampen inflammatory activity. Some insights into the evolution and linkages between inflammatory mechanisms and the coagulation/anticoagulation mechanisms have become evident from recent structural studies. This review will summarize the interactions between inflammation and coagulation.
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            Parathyroid hormone, vitamin D, and cardiovascular disease in chronic renal failure.

            Parathyroid hormone and vitamin D have been shown to influence cardiac and vascular growth and function experimentally in human subjects with normal renal function. Because of the increased prevalence of hyperparathyroidism and altered vitamin D status in chronic renal failure, these alterations have been considered to contribute to the increased prevalence of cardiovascular disease and hypertension seen in this patient population. Methods and Results. In this article, we review experimental and clinical literature on the cardiovascular effects of parathyroid hormone and vitamin D and relate them to the development of cardiac and vascular dysfunction in uremia, such as: cardiomyopathy, myocardial hypertrophy, and fibrosis, as well as to myocardial ischemia; uremic glucose intolerance, dyslipidemia, and atherosclerosis; hypertension; and vascular and cardiac calcifications. The hyperparathyroid state and altered vitamin D status found in uremia contribute to the cardiovascular pathology seen clinically in uremia and also to the excess mortality from cardiovascular causes found in this patient group. The therapeutic implications of these observations are also discussed.
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              • Article: not found

              Vascular access for hemodialysis.

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                Author and article information

                Journal
                AJN
                Am J Nephrol
                10.1159/issn.0250-8095
                American Journal of Nephrology
                S. Karger AG
                0250-8095
                1421-9670
                2007
                July 2007
                13 June 2007
                : 27
                : 4
                : 366-372
                Affiliations
                Departments of aNephrology, bBiochemistry, cHematology and dGeneral Surgery, Baskent University Faculty of Medicine, Ankara, Turkey
                Article
                103911 Am J Nephrol 2007;27:366–372
                10.1159/000103911
                17570903
                24763df8-3c00-4bb3-b76b-8742e9062f3d
                © 2007 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
                : 05 February 2007
                : 04 May 2007
                Page count
                Figures: 2, Tables: 2, References: 24, Pages: 7
                Categories
                Original Report: Laboratory Investigation

                Cardiovascular Medicine,Nephrology
                Arteriovenous fistula thrombosis,Hemodialysis,Soluble endothelial protein C receptor

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