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Role of Pendrin in Acid-base Balance

By Jae Hyun Chang and Sejoong Kim

Abstract

Pendrin (SLC26A4) is a Na+-independent Cl-/HCO3- exchanger which is expressed in the apical membranes of type B and non-A, non-B intercalated cells within the distal convoluted tubule, the connecting tubule, and the cortical collecting duct. In those segments it mediates HCO3- secretion and chloride (Cl-) absorption. In mice, no renal abnormalities are observed under basal conditions, and individuals with genetic disruption of the pendrin (SLC26A4) gene (Pendred syndrome) have normal acid-base balance. In contrast, there are definite differences under conditions wherein the transporter is stimulated. In animal studies, pendrin (SLC26A4) is upregulated with aldosterone analogues, Cl- restriction, and metabolic alkalosis, and is down-regulated with Cl loading and metabolic acidosis, independently. However, the exact role of pendrin in humans has not been established to date, and further examinations are necessary

Topics: Review Article
Publisher: The Korean Society of Electrolyte Metabolism
OAI identifier: oai:pubmedcentral.nih.gov:3041483
Provided by: PubMed Central

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Citations

  1. (2002). 1) Alper SL: Genetic diseases of acid-base transporters. Annu Rev Physiol 64:899-923,
  2. (2004). 3) Wagner CA, Geibel JP: Acid-base transport in the collecting duct.
  3. (1989). 5) Schuster VL: Function and regulation of collecting duct intercalated cells. Annu Rev Physiol 55:267-288,
  4. (2003). Physiol Renal Physiol 284:F229-241,