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雌激素受体2基因多态性与绝经后女性骨密度的相关性研究

, PP. 81-84

Keywords: 雌激素受体基因,单核苷酸多态性,骨密度,聚合酶链反应-限制性片段长度多态性

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Abstract:

目的探讨雌激素受体2(estrogenreceptorbeta,ESR2)基因的单核苷酸多态性(singlenucleotidepolymorphism,SNP)与绝经后女性的骨密度(bonemineraldensity,BMD)是否相关。方法使用双能X线骨密度仪测量重庆市140例绝经后女性第2~4腰椎(L2~L4)及左股骨颈BMD值。采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术分析ESR2基因第5外显子T1057G和G1082A及第8外显子G1730ASNPs。结果在全部受试者中,ESR2基因第5外显子1057T位点仅检测到VV1种基因型;G1082A基因型RR、Rr及rr频率分别为81.43%、17.14%及1.43%;G1730A基因型AA及Aa频率分别为87.86%及12.14%,aa基因型缺失;G1082A和G1730ASNPs的基因型分布符合Hardy-Weinberg平衡(P>0.05)。校正年龄、体质量、绝经年限等BMD影响因素后,G1082ASNP与L2和L4BMD显著相关(P<0.05),而与L3及股骨颈BMD无明显关联(P>0.05);G1730ASNP与股骨颈BMD显著相关(P<0.01),而与腰椎BMD无明显关联(P>0.05)。结论绝经后女性ESR2基因第5外显子G1082ASNP的r等位基因可能是腰椎低BMD的独立危险因素;第8外显子G1730ASNP的a等位基因可能是股骨颈低BMD的独立危险因素。

References

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