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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Compound Name
Protein Name
Organism
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 POU class 2 homeobox 2 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 POU class 2 homeobox 2 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 POU class 2 homeobox 2 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 POU class 2 homeobox 2 Rattus norvegicus
5 Apparent Km values for TEA uptake by MDCK-OCT1 and MDCK-OCT2 cells were 38 and 45 microM, respectively. Tetraethylammonium POU class 2 homeobox 2 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 POU class 2 homeobox 2 Rattus norvegicus