5′HOXD基因与单纯性马蹄内翻足的相关性分析

Analysis of association between 5′HOXD gene and idiopathic congenital talipes equinovarus

目的检测HOXD10、HOXD12、HOXD13基因内4个已知单核苷酸多态(single nucleotide poly-morphisms,SNP)rs2593778、rs847154、rs847151、rs13392701在单纯性马蹄内翻足核心家系中的分布情况,分析各个SNP位点及所构成单倍型与单纯性马蹄内翻足的相关性。方法应用限制性片段长度多态性技术结合测序,分析84个单纯性马蹄内翻足核心家系4个SNP位点基因型;应用ETDT软件统计分析各SNP位点基因型与单纯性马蹄内翻足的相关性;应用TRANSMIT软件构建单倍型并统计分析单倍型频率是否存在差异。结果位于HOXD12基因5′侧翼序列的SNP位点rs847154和位于HOXD13第1外显子的SNP位点rs13392701在单纯性马蹄内翻核心家系中存在传递不平衡(P<0.05);位于HOXD12基因第1外显子的SNP位点rs847151未检测到多态;位于HOXD10第1外显子的SNP位点rs2593778经ETDT分析无统计学意义。结论HOXD12基因5′侧翼序列的SNP位点rs847154和位于HOXD13第1外显子的SNP位点rs13392701与单纯性先天性马蹄内翻足有明显的相关性,提示HOXD12、HOXD13可能是单纯性马蹄内翻足重要的易感基因。

Objective Four single nueleotide polymorphisms （SNP） in HOXDIO, HOXD12 and HOXD13 genes were chosen to investigate SNP and haplotypes distribution in idiopathic congenital tatipes equinovarus nuclear pedigrees. Methods Genotypes of 4 SNPs in 84 idiopathic congenital talipes equinovarus nuclear pedigrees were analyzed by restriction fragment length polymorphism and DNA sequencing. Analysis of association between SNP locus and idiopathic congenital tatipes equinovarus was performed using ETDT software. Haplotypes and their frequencies in 84 nuclear pedigrees were established and analyzed by TRANSMIT software. Results rs847151 polymorphism was not detected; the rs847154 located in 5＇ flanking sequence ofHOXD12 gene and the rs13392701 located in exon 1 of HOXD13 gene were noted to have transmission disequilibrium in 84 nuclear pedigrees （ P 〈 0.05 ）. Contusion rs847154 located in 5＇ flanking sequence ofHOXD12 gene and rs13392701 located in exon 1 of HOXD13 gene are associated with idiopathic congenital tatipes equinovarus; HOXD12 and HOXD13 are important susceptible genes of idiopathic congenital tatipes equinovarus.