Bone Mineral Density and Its Regulation Depending on Magnesium Status in Post-Menopausal Women With Arterial Hypertension and Chronic Heart Failure

Abstract

The aim of study was to identify markers of bone turnover such as osteoprotegerin (OPG), receptor activator for nuclear factor kappa-B ligand (RANKL), 25-hydroxyvitamin D (25(OH)D), and bone density (BMD) in postmenopausal women with arterial hypertension (AH) and heart failure with preserved ejection fraction (HFpEF), depending on magnesium (Mg) status. Material and methods. 140 postmenopausal women aged 52 to 76 years with AH and HFpEF were examined. Based on the Mg-tolerance test, patients were divided into 2 groups: with Mg deficiency (n=72) and without one (n=68). BMD in the neck and proximal femoral area, as well as L1-L4 vertebrae, was measured in by dual-energy X-ray absorptiometry. OPG, soluble RANKL (sRANKL) and 25(OH)D level was also determined by enzyme immunoassay. Results. In Mg deficiency group were noted lower BMD indices in L1-L4 vertebrae area (0,990±0,159 g/cm2 vs 1,046±0,193 g/cm2; p=0,041) and higher osteopenia incidence (RR=1,60; 95% CI: 1,08–2,38; p=0,019). Also, Mg deficient women had higher level of OPG (85,2 [69,1; 103,1] pg/ml vs 79,9 [63,4; 92,7] pg/ml, p=0,035) and sRANKL (3,98 [2,70; 5,45] pg/ml vs 2,85 [1,95; 3,82] pg/ml, p<0,0001) expression, but lower OPG/sRANKL ratio (22.59 [15.34; 33.71] vs 26.01 [19.42; 41.19], p=0.028) in opposite to control group parameters. At the same time, patients with Mg deficiency had higher 25(OH)D impaired status incidence (97% vs 87%; p=0,028). Conclusion. Lower BMD and OPG/sRANKL ratio, but higher OPG and sRANKL expression and higher frequency of 25(OH)D impaired status were revealed in postmenopausal women with AH, HFpEF and Mg deficiency compared to the control group.