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COPD : Magnesium in the plasma and polymorphonuclear cells of patients during a stable phase

Magnesium is one of the most important factors fopr regulation of inflammantory responseas well as muscle function and COPD is a multicomponent disease characterized by abnormal infammantory response of the lungs with systemic muscle dysfunction. Because polymorphonuclear (PMN) cella are significantly represented in the pathogenesis of COPD, concentrations of total (tMg) and ionized (iMg) magnesium were determined in plasma and isolated PMN cells in 46 patients in stable phase of COPD ( past smokers, current smokers. and non-smokers), 24 healthy smokers and 37 healthy non-smokers. In the same samples concentrations of total (tCa) and ionised (iCa) were determined , due to the antagonism of magnesium toward calcium. We found decreased biological active iMg in PMN compared to the group of healthy non-smokers. In the plasma and isolated PMN of the patients the ratio of total calcium/total magnesium (tCa/tMg) was significantly increased compared to the group helathy non-smokers and to the group of healthy smokers. In the group of patients the concentration of tCa was significantly increased in all samples compared to the healthy groupof non smokers and healthy smokers. The results univariant logistic regresion analysis for smoking, concentration of tCa and ratio of tCa/tMg in PMN showed high odds ratio for COPD status. These results raise a possibility that intracellular polymorphonuclear value of magnesiumcould be a distinctive marker for COPD risk disciosure among smokers.

chronic obstructive pulmonary disease; ionized magnesium

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