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      Isolation and Purification of Erythropoiesis Inhibitory Activity from Uremic Sera

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          Abstract

          In vitro erythropoiesis inhibitory activity (EIA) was isolated and partially purified from sera obtained from a patient with chronic renal failure (CRF). EIA was purified from human sera by ammonium sulfate precipitation, column chromatography and PAGE electophoresis, and the corresponding biological activity was assayed in erythroid colony (CFU-E) cultures. Ammonium sulfate precipitation revealed that the EIA resided in two high molecular weight fractions which yielded a single peak on G-200 Sephadex. PAGE electrophoresis demonstrated that the EIA fraction separated into 3 bands with a molecular weight range of 12,000–50,000 daltons. Antibody to EIA was prepared in rabbits, and Ouchterlony immunodiffusion assays employing the antibody material revealed that several CRF sera generated intense double preciptin bands when tested in the assay. In contrast, normal sera consistently yielded a weak preciptin band. These results suggest the presence of reduced amounts of EIA-like material in normal humans and elevated levels in CRF sera. The significance of EIA in the anemia of CRF is discussed.

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          Author and article information

          Journal
          NEF
          Nephron
          10.1159/issn.1660-8151
          Nephron
          S. Karger AG
          1660-8151
          2235-3186
          1988
          1988
          09 December 2008
          : 48
          : 1
          : 22-27
          Affiliations
          Department of Medicine, New York Medical College, Valhalla, N.Y., USA
          Article
          184863 Nephron 1988;48:22–27
          10.1159/000184863
          3124009
          © 1988 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.

          Page count
          Pages: 6
          Categories
          Original Paper

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