Sodium-chloride cotransporter (NCC) (NCC)

The Sodium-chloride cotransporter (NCC), encoded by the SLC12A3 gene, is a transmembrane protein primarily expressed on the apical membrane of the distal convoluted tubule (DCT) in the kidney (UniProt: P55017). It mediates the electroneutral reabsorption of sodium and chloride ions from the tubular fluid, a process that accounts for approximately 5-10% of the total renal sodium reabsorption and is vital for maintaining systemic blood pressure and electrolyte balance (StatPearls: NBK532918). NCC is the primary therapeutic target for thiazide and thiazide-like diuretics, which are widely prescribed as first-line treatments for hypertension and to manage edema associated with heart failure or renal disease (PubMed: 25607115). The term related renal targets typically encompasses other members of the SLC12 family, most notably the Sodium-potassium-chloride cotransporter 2 (NKCC2) in the loop of Henle, which is the target of loop diuretics (NCBI Gene: 6557). Dysregulation or genetic mutations in these transporters lead to various salt-wasting or salt-retaining syndromes, such as Gitelman, Bartter, and Gordon syndromes (PubMed: 21834911). Together, these transporters are fundamental to renal pharmacology and the management of cardiovascular and fluid-balance disorders.

Other names

SLC12A3Thiazide-sensitive sodium-chloride cotransporterSolute carrier family 12 member 3TSCNCCSLC12A1NKCC2Sodium-potassium-chloride cotransporter 2

Inhibition of the electroneutral transport of sodium and chloride ions in the distal convoluted tubule (via NCC) and the thick ascending limb of the loop of Henle (via NKCC2), leading to increased solute excretion and diuresis.