We focus on the recent "ionic hypothesis", in which an alteration of ionic metabolism represents a peculiar event in the pathogenesis of obesity and hypertension. We report the results from our original studies in which we evaluated intraplatelet magnesium levels. In a study on normotensive and hypertensive patients with non insulin-dependent diabetes mellitus and healthy control subjects, we showed a common reduction of plasma, erythrocyte and platelet magnesium levels in both normotensive and hypertensive diabetics with respect to control. Anyway, hypertensive diabetics showed a greater reduction of intraplatelet magnesium concentrations when compared to normotensive diabetics. Using the same technique, we found reduced erythrocyte and platelet magnesium concentrations in patients with essential hypertension with respect to the control group. In a successive study, we found, in the group of normotensive obese, that erythrocyte and platelet magnesium levels were significantly lower than those of the control group, while in hypertensive obese patients a reduction of plasma magnesium levels has been also detected. In conclusion, in these studies has been confirmed the existence of a reduction of the intracellular magnesium concentrations, which is common in hypertensive and obese patients.
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