Role of Pendrin in Acid: base Balance
Electrolytes & Blood Pressure
;
: 20-24, 2009.
Article
in English
| WPRIM
| ID: wpr-69286
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Acid-Base Equilibrium
/
Acidosis
/
Acidosis, Renal Tubular
/
Absorption
/
Aldosterone
/
Alkalosis
/
Membranes
Limits:
Animals
/
Humans
Language:
English
Journal:
Electrolytes & Blood Pressure
Year:
2009
Type:
Article
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