Go to JCI Insight
  • About
  • Editors
  • Consulting Editors
  • For authors
  • Alerts
  • Advertising/recruitment
  • Subscribe
  • Contact
  • Current Issue
  • Past Issues
  • By specialty
    • COVID-19
    • Cardiology
    • Gastroenterology
    • Immunology
    • Metabolism
    • Nephrology
    • Neuroscience
    • Oncology
    • Pulmonology
    • Vascular biology
    • All ...
  • Videos
    • Conversations with Giants in Medicine
    • Author's Takes
  • Reviews
    • View all reviews ...
    • 100th Anniversary of Insulin's Discovery (Jan 2021)
    • Hypoxia-inducible factors in disease pathophysiology and therapeutics (Oct 2020)
    • Latency in Infectious Disease (Jul 2020)
    • Immunotherapy in Hematological Cancers (Apr 2020)
    • Big Data's Future in Medicine (Feb 2020)
    • Mechanisms Underlying the Metabolic Syndrome (Oct 2019)
    • Reparative Immunology (Jul 2019)
    • View all review series ...
  • Viewpoint
  • Collections
    • Recently published
    • In-Press Preview
    • Commentaries
    • Concise Communication
    • Editorials
    • Viewpoint
    • Top read articles
  • Clinical Medicine
  • JCI This Month
    • Current issue
    • Past issues

  • Current issue
  • Past issues
  • Specialties
  • Reviews
  • Review series
  • Conversations with Giants in Medicine
  • Author's Takes
  • Recently published
  • In-Press Preview
  • Commentaries
  • Concise Communication
  • Editorials
  • Viewpoint
  • Top read articles
  • About
  • Editors
  • Consulting Editors
  • For authors
  • Alerts
  • Advertising/recruitment
  • Subscribe
  • Contact
Top
  • View PDF
  • Download citation information
  • Send a letter
  • Share this article
  • Terms of use
  • Standard abbreviations
  • Need Help? E-mail the JCI
  • Top
  • Abstract
  • Version history
  • Article usage
  • Citations to this article

Advertisement

Research Article Free access | 10.1172/JCI111420

Sodium chloride absorption by the urinary bladder of the winter flounder. A thiazide-sensitive, electrically neutral transport system.

J B Stokes

Find articles by Stokes, J. in: JCI | PubMed | Google Scholar

Published July 1, 1984 - More info

Published in Volume 74, Issue 1 on July 1, 1984
J Clin Invest. 1984;74(1):7–16. https://doi.org/10.1172/JCI111420.
© 1984 The American Society for Clinical Investigation
Published July 1, 1984 - Version history
View PDF
Abstract

The urinary bladder of the winter flounder absorbs NaCl by a process independent of the transepithelial voltage. In contrast to most other epithelia which have a neutral NaCl-absorptive system, the flounder bladder has a high transepithelial resistance. This feature simplifies analysis of the cellular transport system because the rate of ion transfer through the paracellular pathway is rather low. Experiments were designed to distinguish among three possible mechanisms of neutral NaCl absorption: (a) Na/K/2Cl cotransport; (b) parallel Na/H and Cl/OH exchange; (c) and simple NaCl cotransport. A clear interdependency of Na and Cl for net absorption was demonstrated. NaCl absorption was not dependent on mucosal K and was minimally sensitive to loop diuretics. Thus a Na/K/2Cl transport system was unlikely. The mechanism was not parallel exchange as evidenced by insensitivity to amiloride and to 4,4'-diisothiocyano-2,2'-disulfonic stilbene, an inhibitor of anion exchange. In addition, inhibitors of carbonic anhydrase had no effect. Net absorption was almost completely abolished by hydrochlorothiazide (0.1 mM). Its action was rapid, reversible, and effective only from the mucosal surface. Metolazone, a structurally dissimilar diuretic in the benzothiadiazide class had qualitatively similar actions. The mechanism of NaCl absorption in this tissue appears to be a simple interdependent process. Its inhibition by thiazide diuretics appears to be a unique feature. The flounder bladder may be a model for NaCl absorption in the distal renal tubule.

Browse pages

Click on an image below to see the page. View PDF of the complete article

icon of scanned page 7
page 7
icon of scanned page 8
page 8
icon of scanned page 9
page 9
icon of scanned page 10
page 10
icon of scanned page 11
page 11
icon of scanned page 12
page 12
icon of scanned page 13
page 13
icon of scanned page 14
page 14
icon of scanned page 15
page 15
icon of scanned page 16
page 16
Version history
  • Version 1 (July 1, 1984): No description

Article tools

  • View PDF
  • Download citation information
  • Send a letter
  • Share this article
  • Terms of use
  • Standard abbreviations
  • Need Help? E-mail the JCI

Metrics

  • Article usage
  • Citations to this article

Go to

  • Top
  • Abstract
  • Version history
Advertisement
Advertisement
Follow JCI:
Copyright © 2021 American Society for Clinical Investigation
ISSN: 0021-9738 (print), 1558-8238 (online)

Sign up for email alerts