Title : Functional characteristics and membrane localization of rat multispecific organic cation transporters, OCT1 and OCT2, mediating tubular secretion of cationic drugs.

Pub. Date : 1998 Nov

PMID : 9808712






6 Functional Relationships(s)
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Protein Name
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1 Tetraethylammonium (TEA) uptake by both MDCK-OCT1 and MDCK-OCT2 cells was markedly elevated when TEA was added to the basolateral medium, but not to the apical medium. Tetraethylammonium solute carrier family 22 member 1 Rattus norvegicus
2 Tetraethylammonium (TEA) uptake by both MDCK-OCT1 and MDCK-OCT2 cells was markedly elevated when TEA was added to the basolateral medium, but not to the apical medium. Tetraethylammonium solute carrier family 22 member 1 Rattus norvegicus
3 Tetraethylammonium (TEA) uptake by both MDCK-OCT1 and MDCK-OCT2 cells was markedly elevated when TEA was added to the basolateral medium, but not to the apical medium. Tetraethylammonium solute carrier family 22 member 1 Rattus norvegicus
4 Efflux of TEA from MDCK-OCT1 and MDCK-OCT2 cells was not changed by extracellular pH from 5.4 to 8.4, whereas TEA uptake by both transfectants was decreased by acidification of extracellular medium. Tetraethylammonium solute carrier family 22 member 1 Rattus norvegicus
5 Apparent Km values for TEA uptake by MDCK-OCT1 and MDCK-OCT2 cells were 38 and 45 microM, respectively. Tetraethylammonium solute carrier family 22 member 1 Rattus norvegicus
6 Although various hydrophilic organic cations such as 1-methyl-4-phenylpyridinium, cimetidine, quinidine, nicotine, N1-methylnicotinamide and guanidine markedly inhibited TEA uptake by both MDCK-OCT1 and MDCK-OCT2 cells, there were no significant differences in the apparent inhibition constants (Ki) against these organic cations between both transfectants. Tetraethylammonium solute carrier family 22 member 1 Rattus norvegicus