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  • Title: Coupling of a loop diuretic-sensitive Na+ influx with the net loop diuretic-sensitive K+ efflux in mouse NIH 3T3 cells.
    Author: Panet R, Snyder D, Atlan H.
    Journal: Biochim Biophys Acta; 1985 Jun 27; 816(2):278-82. PubMed ID: 4005244.
    Abstract:
    Mouse 3T3 fibroblasts have a loop diuretic sensitive Na+ transport system, responsible for more than 50% of the total Na+ influx. This transport system is dependent on the simultaneous presence of all three ions; Na+, K+, (Rb+) and Cl- in the extracellular medium. The same requirement for these three ions was also found for the loop diuretic-sensitive K+ efflux. In addition, the sensitivities of Na+ influx and Rb+ efflux for the two loop diuretics, furosemide and bumetanide were found to be similar. The similar ionic requirement and sensitivity towards loop diuretics of the two fluxes, support the hypothesis, that this loop diuretic-sensitive Na+ influx in mouse 3T3 cells, is accompanied by the net loop diuretic-sensitive K+ efflux.
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