10例食道闭锁患儿基因变异的初探

Preliminary research on gene mutation in 10 children patients with esophageal atresia

目的探索食道闭锁(EA)患儿基因变异情况,为进一步研究EA致病机制提供前期基础。方法收集该院新生儿外科住院的EA患儿10例,运用高通量全外显子组测序研究患儿基因变异情况,并运用生物信息学方法分析基因变异的临床意义。结果高质量的测序数据中,有效读段(Clean reads)占85.36%,其中97%的Clean reads能与参考基因进行比对。通过比对分析共获得单核苷酸多态性位点520 541个,其中149 622个位点发生单核苷酸变异(SNV),包括同义突变、非同义突变、终止密码子获得、终止密码子缺失、插入移码突变、非插入移码突变和未知突变等;同时检测到598个拷贝数变异基因。功能聚类分析显示突变基因与细胞生物学密切相关。结论 SNV的发生可能影响体内各种蛋白质的表达及其功能,在EA的致病机制中可能发挥重要作用。

Objective To explore the genetic variation in children patients with esophageal atresia（EA）to provide a prophase basis for further studying EA pathogenesis.Methods Ten children cases of EA were collected from the neonatal surgery department of our hospital.The high-throughput whole-exon sequencing was used to study the genetic variations,and their clinical significance was analyzed by the bioinformatics methods.Results In the high quality sequencing data,the effective clean reads accounted for 85.36%,in which 97% of the clean reads could participate in the comparison with the reference genes.The comparison analysis obtained 520 541 single nucleotide polymorphism sites,in which single nucleotide variation（SNV）occurred at 149 622 sites,including synonymous mutation,non-synonymous mutation,stop codon gain,stop codon loss,frameshift insertion,non-frameshift insertion,unknown mutation;meanwhile,598 copy number variation genes were detected.The functional cluster analysis revealed that the mutant genes were closely related to cell biology.Conclusion The SNV occurrence may influence the expression and function of body various proteins and may play an important role in EA pathogenesis.