降钙素受体基因多态性与上海地区妇女骨密度的关系

目的探讨降钙素受体(calcitoninreceptor,CTR)基因多态性与绝经前和绝经后妇女骨密度(bonemineraldensity,BMD)之间的关系。方法采用聚合酶链反应-限制性片段长度多态性(polymerasechainreaction-restrictionfragmentlengthpolymorphism,PCR-RFLP)方法,对上海地区184名绝经前和199名绝经后妇女进行CTR基因型的检测。应用双能X线骨密度仪(dual-energyX-rayabsorptiometry,DEXA)测定腰椎和股骨颈BMD。结果383名上海地区妇女CTR基因型频率分布依次为CC型占83.8%,TC型14.6%,TT型1.6%。在绝经后妇女组,CC型的股骨颈BMD明显高于TC和TT型(P<0.01),而在绝经前组不同基因型的各部位BMD无差别。多元逐步回归分析提示,CTR基因型与绝经后妇女股骨颈BMD相关(P<0.05)。结论CTR基因多态性与绝经后妇女BMD存在一定的关联。

Association of calcitonin receptor gene polymorphism with bone mineral density in Shanghai women

OBJECTIVE: To investigate the association of calcitonin receptor (CTR) gene polymorphism with bone mineral density (BMD) in premenopausal and postmenopausal women. METHODS: CTR genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 184 premenopausal women and 199 postmenopausal women in Shanghai area. BMD at lumbar spine (L2-4) and femoral neck (FN) were measured by dual-energy X-ray absorptiometry (DEXA). RESULTS: The distribution of CTR genotypes in 383 Shanghai women were CC genotype 83.8%, TC genotype 14.6%, TT genotype 1.6%, respectively. BMD at FN of CC genotype was significantly higher than TC and TT genotypes (P < 0.01) in postmenopausal women. But there was no difference in BMD of different CTR genotypes in premenopausal women. Multiple regression analysis showed that CTR genotypes were associated with FN BMD in postmenopausal women (P < 0.05). CONCLUSIONS: The polymorphism of CTR gene was associated with BMD in postmenopausal women.