Association of polymorphisms in low-density lipoprotein receptor- related protein 5 gene with bone mineral density in postmenopausal Chinese women

• 来源期刊: 中国药理学报（英文版）
• 关键词: bone density low-density lipoprotein receptorrelated protein 5 polymorphism
• 年，卷（期）: 2005,（9）
• 页码范围: 1111-1116
• 页数: 6页
• 语种: 英文

摘要

Aim: To investigate the possible association of Q89R, N740N and A1330V polymorphisms in low-density lipoprotein receptor-related protein 5 (LRP5) gene with bone mineral density (BMD) in postmenopausal Chinese women. Methods: Q89R,N740N and A1330V genotypes were determined by polymerase chain reactionrestriction fragment length polymorphism (PCR-RFLP) in 647 unrelated healthy postmenopausal Han Chinese women aged 43-76 years in Shanghai. BMD at lumbar spine 1-4 and the left proximal femur including the femoral neck, trochanter and Ward's triangle were measured by dual-energy X-ray absorptionmetry in all subjects. Results: The distribution of the Q89R, N740N and A1330V genotypes in this population was as follows: QQ 80.5%, QR 18.7%, and RR 0.8%; TT 66.9%,TC 31.1%, and CC 2.0%; AA 68.0%, AV 29.7%, and VV 2.3%. The frequencies of the Q89R, N740N and A1330V genotypes and alleles did not deviate from the HardyWeinberg equilibrium. We found that the Q89R and A1330V polymorphisms were in linkage disequilibrium in our population (x2= 13.50, P＜0.01). Both before and after adjusting for age, years since menopause, height, and weight, the Q89R or N740N genotypes were significantly associated with BMD at the femoral neck (P＜0.05).Subjects with the Q89R QQ genotype or the N740N TT genotype had a significantly higher BMD at the femoral neck, compared with those with the QR/RR or TC/CC genotypes, respectively. No significant association was found between A1330V polymorphism and BMD at any site. Conclusion: Our findings suggest that the LRP5 gene is a candidate for the genetic determination of BMD in postmenopausal Chinese women.