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Permanently reduced plasma ionized magnesium among renal transplant recipients on cyclosporine
Hypomagnesemia is common after kidney transplantation. Until recently, only the determination of total plasma magnesium was possible, whereas the assessment of ionized magnesium has since become practicable. One hundred and nine renal transplant patients on cyclosporine with allografts functioning stably for more than 6 months and plasma creatinine levels of less than 200 micromol/l entered the study. Total and ionized circulating magnesium were assessed among these 109 patients, as well as among 15 renal transplant patients not on cyclosporine and 21 healthy volunteers. Cyclosporine patients showed significantly lower total and ionized circulating magnesium values than the two control groups. Plasma total and ionized magnesium levels were also significantly lower among cyclosporine patients treated concurrently with insulin or oral hypoglycemic agents than among those who were not. No correlation was noted between time after transplantation and plasma magnesium with respect to patients on cyclosporine. In conclusion, the study demonstrates that a large subset of renal transplant patients treated with cyclosporine have permanent deficiencies of ionized and total magnesium. The tendency towards hypomagnesemia is also more pronounced among patients with diabetes mellitus.
Adolescent Adult Aged Azathioprine/therapeutic use Cardiovascular Agents/therapeutic use Child Cyclosporine/*therapeutic use Diuretics/therapeutic use Female Follow-Up Studies Humans Hypoglycemic Agents/therapeutic use Immunosuppressive Agents/*therapeutic use Kidney Transplantation/immunology/*physiology Magnesium/*blood Male Middle Aged Mycophenolic Acid/analogs & derivatives/therapeutic use Prednisone/therapeutic use Reference Values
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