Urinary Excretion of Aquaporin-2 Water Channel in Diabetic Ketoacidosis

Abstract

We studied the changes in plasma arginine vasopressin (AVP) and urinary excretion of aquaporin-2 (UAQP-2) water channel in 3 patients with diabetic ketoacidosis. They had marked hyperglycemia of 27.9 ± 2.8 mmol/l (mean ± SEM), and elevated hemoglobin A1c of 8.8 ± 1.4%. Circulatory blood volume was decreased by approximately 25%, which was determined by the changes in hematocrit. Plasma AVP levels were elevated to 10.3 ± 3.0 pmol/l and UAQP-2, 578 ± 200 fmol/mg creatinine (normal, 153 ± 28) at the hospitalization. When hyperglycemia was improved by the intravenous infusion of a small dose of insulin plus fluid administration, both plasma AVP and UAQP-2 promptly decreased to 1.2 ± 0.2 pmol/l and 252 ± 29 fmol/mg creatinine on day 7, respectively. These alterations were concomitant with the recovery of circulatory blood volume. In the present study, UAQP-2, in addition to plasma AVP, indicates circulatory blood volume depletion, and the changes in UAQP-2 estimates the AVP-dependent recovery of circulatory blood volume during the therapeutic period in the patients with diabetic ketoacidosis.

Journal

Journal ID (publisher-id): NEF

Journal ID (nlm-ta): Nephron

Journal ID (doi): 10.1159/issn.1660-8151

Title: Nephron

Publisher: S. Karger AG

ISSN (Print): 1660-8151

ISSN (Electronic): 2235-3186

Publication date Subscription-year: 2002

Publication date (Print): May 2002

Publication date (Electronic): 02 May 2002

Volume: 91

Issue: 1

Pages: 167-169

Affiliations

Division of Endocrinology and Metabolism, Department of Medicine, Jichi Medical School, Tochigi, Japan

Article

Publisher ID: 57622 Other ID: Nephron 2002;91:167–169

DOI: 10.1159/000057622

PubMed ID: 12021537

Copyright statement: © 2002 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.

Page count

Figures: 1, References: 14, Pages: 3

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Categories

Subject: Short Communication