A susceptibility haplotype within the endothelial nitric oxide synthase gene influences bone mineral density in hypertensive women
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The influence of the coordinated effect of various single-nucleotide polymorphisms (SNPs) within the endothelial nitric oxide synthase (eNOS) gene on the risk of osteoporosis in hypertension has remained undetermined. Four pertinent SNPs of the eNOS gene, rs2070774, rs1799983, rs1800780 and rs3918181, were examined for the risk of osteoporosis in 313 hypertensive postmenopausal women in Northwest India. All the hypertensive women were verified with dual energy X-ray absorptiometry and categorized as 150 with osteoporosis and 163 without osteoporosis. The minor allele (T) of rs1799983 exerts a statistically significant risk for osteoporosis both in dominant [odds ratio (OR) 3.71, 95 % confidence interval (CI) 2.12–6.49, P < 0.001] and recessive mode (OR 5.75, 95 % CI 1.24–26.69, P = 0.036) after Bonferroni correction. Bone mineral density (BMD) values (corrected for the effects of risk variables) according to eNOS SNP genotypes revealed a significant association with rs1799983 at both the lumbar spine (P = 0.001) and femoral neck (P = 0.023). Risk association analyses revealed a susceptibility haplotype TTAG which influences the risk of osteoporosis (OR 2.02, 95 % CI 1.05–3.39, P = 0.042) in hypertension after adjusting for the effects of risk factors. Furthermore, this haplotype was significantly associated with BMD at the lumbar spine (P = 0.029) and femoral neck (P = 0.021) in a dose-dependent manner. The results suggest that possession of the TTAG haplotype of the eNOS gene may increase the risk of osteoporosis two-fold in hypertensive postmenopausal women in Northwest India.
KeywordseNOS gene Haplotype Bone mineral density Osteoporosis Hypertension
- 1.Strazzullo P, Nunziata V, Cirillo M, Giannattasio R, Ferrara LA, Mattioli PL, Mancini M (1983) Abnormalities of calcium metabolism in essential hypertension. Clin Sci (Lond) 65:137–141Google Scholar
- 13.Taylor BC, Schreiner PJ, Zmuda JM, Li J, Moffett SP, Beck TJ, Cummings SR, Lee JM, Walker K, Ensrud KE, SOF Research Group (2006) Association of endothelial nitric oxide Synthase genotypes with bone mineral density, bone loss, hip fracture and risk of fracture in older women: The SOF study. Bone 39:174–180Google Scholar