Enhanced distal absorption of potassium by magnesium-deficient rats.
The effect of acute potassium infusion on renal tubular reabsorption of potassium by magnesium-deficient and pair-fed control rats has been studied by the recollection micropuncture method. During potassium chloride infusion, the amount of potassium remaining in the distal tubule is lower in magnesium-deficient than in pair-fed rats. This could be due to a reduction in potassium secretion or to an enhancement of potassium reabsorption. The present study demonstrates enhanced renal potassium retention in the magnesium-deficient rat, and is in contrast to previous reports of renal potassium wasting in this circumstance.
D000042:Absorption; D000818:Animals; D007684:Kidney Tubules / Q000378:metabolism*; D007686:Kidney Tubules, Distal / Q000187:drug effects / Q000378:metabolism*; D008275:Magnesium Deficiency / Q000378:metabolism*; D008297:Male; D011188:Potassium / Q000097:blood / Q000378:metabolism* / Q000652:urine; D011189:Potassium Chloride / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D012964:Sodium / Q000378:metabolism
D011189:Potassium Chloride; D012964:Sodium; D011188:Potassium