Na+/HCO3- Cotransporter | Biologically Active Compounds

The electrogenic Na/HCO3 cotransporter (symporter) is the major HCO3- transporter of the renal proximal tubule (PiT), located at the basolateral membrane (BLM), and also plays a noteworthy role in Na+ reabsorption. HCO3 transporters are important for regulation of intracellular pH (pHi) in most cells and also thereby regulate blood pH. This electrogenic Na/HCO3 cotransporter is first discovered using perfused Ambystoma tigrinum (salamander) renal, proximal tubules. This novel cotransporter mediates the movement of one Na+ ion with several HCO3- ions, making it electrogenic, is blocked by stilbene compounds, but does not depend on intra- or extracellular Cl-. This and similar cotransporters have been found in a number of tissues and cell types.

S0859

S0859, an N-cyanosulphonamide compound, reversibly inhibit NBC-mediated pH(i) recovery (K (i)=1.7 microM, full inhibition at approximately 30 microM). IC50 value:Target: NBCNa(+)-coupled HCO(3)(-) transporters (NBCs) mediate the transport of bicarbonate ions across cell membranes and are thus ubiquitous regulators of intracellular pH. NBC dysregulation is associated with a range of diseases; for instance, NBCn1 is strongly up-regulated in a model of ErbB2-dependent breast cancer, a malignant and widespread cancer with no targeted treatment options, and single-nucleotide polymorphisms in NBCn1 genetically link to breast cancer development and hypertension. Treatment with NBC inhibitor S0859 significantly increased caspase-3 activity and elevated the number of apoptotic EC. S0859 is potentially important for probing the transporter's functional role in heart and other tissues.

CAS Number: 1019331-10-2
MF: C₂₉H₂₄ClN₃O₃S
MW: 530.037
Catalog: Na+/HCO3- Cotransporter

Density: 1.3±0.1 g/cm3
Boiling Point: 748.5±70.0 °C at 760 mmHg
Melting Point: N/A
Flash Point: 406.5±35.7 °C

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