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  • Title: Effect of hypermagnesemia on circulating plasma parathyroid hormone in patients on regular hemodialysis therapy.
    Author: McGonigle RJ, Weston MJ, Keenan J, Jackson DB, Parsons V.
    Journal: Magnesium; 1984; 3(1):1-7. PubMed ID: 6482508.
    Abstract:
    This study was designed to assess the influence of magnesium on circulating plasma immunoreactive parathyroid hormone (iPTH) in end-stage renal disease. 20 patients receiving regular hemodialysis therapy underwent plasma measurements of iPTH and 25-hydroxycholecalciferol (25-OHCC) concentrations before and 10 weeks after the magnesium concentration in the dialysate was increased from 0.75 to 1.50 mmol/l. This resulted in a 36% rise in the mean predialysis plasma magnesium concentration from 1.25 to 1.70 mmol/l (p less than 0.001) and a 23% fall in the mean plasma iPTH concentration from 546 to 418 ng/l (p less than 0.001). Mean plasma concentrations for calcium, phosphate, and 25-OHCC also decreased, but these changes were not significant. In conclusion, we have demonstrated that a rise in plasma magnesium concentration from elevated to significantly higher levels reduces circulating plasma iPTH in normocalcemic uremic patients with initially both normal and raised plasma PTH levels.
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