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摘要: 目的: 探讨MTHFR、BMPR1B和TYMS基因多态性与先天性小耳畸形的相关性。方法: 收集180例小耳畸形患者和141例健康对照,采用多重PCR分析方法对MTHFR rs4846049、BMPR1B rs1434536和TYMS rs2790位点进行基因型检测,采用χ2检验分析各基因型频率和等位基因频率的在病例组和对照组中的分布,采用分层分析探讨3种基因多态性对不同性别先天性小耳畸形发病风险的影响。结果: TYMS 基因rs2790位点基因型频率和等位基因频率分布在病例组与对照组中差异有统计学意义(P<0.05),进一步分层分析发现,TYMS rs2790基因多态性主要增加男性先天性小耳畸形发病风险(P<0.05),与携带AA 基因型的个体相比,携带基因型AG、GG、AG+GG 的个体发病风险分别为对照组的1.93、3.23和2.10倍,95%CI分别为1.07~3.48、1.12~9.33和1.20~3.68。未发现MTHFR rs4846049、BMPR1B rs1434536多态性和先天性小耳畸形有关(P>0.05)。结论: TYMS rs2790基因多态性和男性先天性小耳畸形发生有关。Abstract: Objective: To explore the relationship between MTHFR,BMPR1B and TYMS polymorphism and congenitial microtia in Chinese Han population.Method: A total of 180 microtia patients and 141 healthy participants were enrolled in this study.The genotyping of MTHFR rs4846049, BMPR1B rs1434536 and TYMS rs2790 of the participants were examined with multiple PCR. Frequencies and allele distribution of MTHFR rs4846049,BMPR1B rs1434536 and TYMS rs2790 between cases and control were analyzed with Chi-square test.Result: The genotype frequency distribution of TYMS rs27901 polymorphism was significantly different between two groups(P<0.05).Furthermore, gender stratified analysis showed that TYMS rs2790 polymorphism mainly increase the risks of congenitial microtia in male(P<0.05).Compared with AA genotype,the mircotia risks of subjects with AG GG AG+GG raised to 1.93, 3.23 and 2.10 times,respectively(95%CI:1.07-3.48、1.12-9.33 and 1.20-3.68).However,there was no relationship between MTHFR rs4846049, BMPR1B rs1434536 and microtia.Conclusion: The TYMS rs2790 polymorphism may be a risk factor of microtia in male.
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Key words:
- microtia /
- MTHFR /
- BMPR1B /
- TYMS /
- gene polymorphism
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