title: Effect of magnesium on passive fluxes of lithium in the human erythrocyte.
abstract: Extracellular Mg2+ is known to inhibit the passive Na+ and K+ fluxes in the human erythrocyte. In this study the effect of extracellular Mg2+ on Li+ efflux was measured in erythrocytes from 29 normotensive and essential hypertensive subjects. Magnesium produced a variable inhibition of between 0 and 47% in Li+ efflux in different subjects and this effect was unrelated to initial cell Li+, blood pressure or to an action on the co- or counter-transport pathways for this cation. A positive correlation was observed between the magnitude of the passive Li+ efflux and its inhibition (0 to 47%) by Mg2+ ions. Thus Mg2+ has an inhibitory effect on passive Li+ permeability which is unrelated to essential hypertension.
mesh_terms: D000328:Adult; D002463:Cell Membrane Permeability / Q000187:drug effects; D004912:Erythrocytes / Q000378:metabolism*; D006801:Humans; D006973:Hypertension / Q000097:blood; D066298:In Vitro Techniques; D008094:Lithium / Q000097:blood*; D008274:Magnesium / Q000494:pharmacology*; D008297:Male; D008875:Middle Aged; D011188:Potassium / Q000097:blood; D012964:Sodium / Q000097:blood
chemical_list: D008094:Lithium; D012964:Sodium; D008274:Magnesium; D011188:Potassium