Advances in Clinical and Experimental Medicine
2018, vol. 27, nr 12, December, p. 1717–1722
Publication type: original article
ALOX12 gene polymorphisms and serum selenium status in elderly osteoporotic patients
1 Mobility Impairment Research Center, Health Research Institute, Babol University of Medical Sciences, Iran
2 Department of Biochemistry and Nutrition, Faculty of Medicine, Zanjan University of Medical Sciences, Iran
3 Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Iran
4 Department of Biostatistics and Epidemiology, Faculty of Medicine, Zanjan University of Medical Sciences, Iran
5 Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Iran
6 Department of Internal Medicine, Ayatollah Rouhani Hospital, Babol University of Medical Sciences, Iran
7 Department of Biochemistry, School of Medicine, Babol University of Medical Sciences, Iran
Background. Osteoporosis is a systemic bone disease which leads to a reduction in bone mass. Many studies have shown that up to 80% of bone mineral density (BMD) variations are attributed to genetic factors. Arachidonate 12-lipoxygenase enzyme, encoded by the ALOX12 gene, produces lipid peroxides as reactive oxygen species (ROS), leading to oxidative stress and the development of osteoporosis. Selenium (Se) is incorporated into selenoproteins, which may reduce the risk of osteoporosis.
Objectives. We aimed to investigate the association of 2 ALOX12 single nucleotide polymorphisms (SNPs) and serum Se level with lumbar spine and femoral neck BMD among elderly individuals living in Amirkola, Iran.
Material and Methods. The study consisted of 180 individuals aged ≥60 years (90 healthy and 90 osteoporotic patients). We examined the effect of 2 ALOX12 SNPs (rs2292350 and rs9897850), using the polymerase chain reaction – restriction fragment length polymorphism (PCR–RFLP) on both BMD regions measured by dual energy X-ray absorptiometry (DXA). Serum Se level was measured using an atomic absorption spectrophotometer PGG990 AAS (PG Instruments Ltd., Luterworth, USA).
Results. The rs2292350 SNP showed a significant association with femoral neck BMD (p = 0.04). Moreover, in terms of serum Se level, a significant difference was found between the patient group (57.58 ±25.54 μg/L) and the control group (81.09 ±25.58 μg/L) (p < 0.001). In addition, individuals with higher serum Se levels also had higher BMD of the lumbar spine (r2 = 0.392; p < 0.001) and the femoral neck (r2 = 0.478; p < 0.001).
Conclusion. The results suggested that genetic variation in ALOX12 might influence BMD variations in our recruited participants. As for the patients with lower serum Se levels, it was observed that serum Se deficiency was accompanied by some ALOX12 variation, contributing to the development of osteoporosis.
osteoporosis, single nucleotide polymorphism, bone mineral density, ALOX12, selenium
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