Abstract
The present study was aimed to investigate the relationship between NOD1/CARD4 and NOD2/CARD15 gene polymorphisms and osteoporosis in the Turkish population. The first time we thought that the functional polymorphisms in NOD1/CARD4 and NOD2/CARD15 genes might have triggered the development of osteoporosis. The objective of our study was to determine the relationship between NOD1/CARD4 and NOD2/CARD15 SNPs and osteoporosis. The NOD1/CARD4 (rs5743336) and NOD2/CARD15 (rs2066847) SNPs were analyzed by PCR restriction fragment length polymorphism (PCR-RFLP) in 94 healthy controls and 164 subjects with osteoporosis. PCR products were digested with restriction enzymes AvaI for NOD1/CARD4 and ApaI for NOD2/CARD15. We found that NOD1/CARD4 genotype distribution of AA, GA and GG were 15, 44 and 41% for patients and 17, 46 and 37% for controls, respectively. NOD2/CARD15 mutation was found only in three patients (1.8%) as heterozygote. The results did not show any statistical difference between NOD1/CARD4 and NOD2/CARD15 genotype distribution of patients and healthy groups (χ2 = 1.740, P=0.187; χ2 = 1.311, P=0.519). However, the most frequent AG genotype (46%) of NOD1/CARD4 was observed in healthy controls, GG genotype (44%) of NOD1/CARD4 was observed as the most frequent in osteoporotic patients. NOD2/CARD15 WT/WT genotype, the most frequent genotype, was observed in both groups. Statistical analysis revealed that NOD1/CARD4 and NOD2/CARD15 polymorphisms are not associated with osteoporosis. However, a definite judgement is difficult to be made due to restricted number of patients and small size of control group. Further research is sorely warranted in this direction.
Highlights
Osteoporosis is a relevant age-related pathological disorder characterized by low bone mass, deterioration in the structure of the bone and increased bone fragility, that is chronic progressive disease, and negatively affects the quality of life [1]
We found that NOD1/CARD4; genotype distribution of AA, AG and GG were 15, 41 and 44% for patients and 17, 46 and 37% for controls, respectively (Table 2)
The most frequent AG genotype (46%) of NOD1/CARD4 was observed in healthy controls, GG genotype (44%) of NOD1/CARD4 was observed as most frequent in osteoporotic patients
Summary
Osteoporosis is a relevant age-related pathological disorder characterized by low bone mass, deterioration in the structure of the bone and increased bone fragility, that is chronic progressive disease, and negatively affects the quality of life [1]. Recently clinical and molecular study results emphasize that inflammation process can effects on bone turnover in the osteoporosis [13,14,15]. Taken together, these findings suggested that the important link between inflammation and bone loss should be investigated genetically
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