Possible effect of leptin on renal magnesium excretion in adolescent patients with type 1 diabetes
Mehmet Emre Atabek1, Selim Kurtoglu, Ozgur Pirgon
1Department of Pediatrics, Division of Pediatric Endocrinology, School of Medicine, Selcuk University, Konya, Turkey. meatabek@hotmail.com
Background:
Hypomagnesaemia and hyperleptinemia are common in patients with diabetes. Moreover, it has been demonstrated that leptin stimulates diuresis and natriuresis. The aim of this study was to evaluate the relationship between serum leptin, serum magnesium (Mg) and urinary Mg/urinary creatinine levels in patients with type 1 diabetes.
Methods:
Serum leptin and Mg and urinary Mg/urinary creatinine levels were measured in 67 patients with diabetes (33 girls and 34 boys). The age, diabetes duration, anthropometric and metabolic parameters of the subjects were matched between girls and boys. The relation of serum leptin levels to serum and urinary Mg/urinary creatinine levels was assessed.
Results:
Serum leptin levels of girls with diabetes were higher than those of the boys (14 +/- 5.3 microg/L vs 5.8 +/- 1.5 microg/L, P < 0.001, respectively). The differences for serum Mg and for urinary Mg/urinary creatinine levels were not significant between girls and boys with diabetes. Leptin levels were correlated with urinary Mg/urinary creatinine levels in both girls and boys (r = 0.39, P = 0.02 and r = 0.37, P = 0.03, respectively). In a multivariate regression model, leptin emerged as independent correlates for mean urinary Mg/urinary creatinine in both girls and boys with the total variance explained being 14%, and 15%, respectively.
Conclusion:
The data suggest that serum leptin might be related to increased urinary Mg loss in patients with type I diabetes.
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