广西三江县侗族新生儿UGT1A1基因变异分析

UGT1A1 gene mutations in Chinese Dong neonates in Sanjiang,Guangxi

摘要:

目的 探讨广西柳州三江县侗族新生儿UGT1A1基因变异特点及其与侗族新生儿高胆红素血症发生的关系。 方法 前瞻性选取2021年1月至2022年1月于三江县人民医院新生儿科诊断不明原因高胆红素血症的新生儿84例为研究对象；另选取同期健康新生儿60例纳入健康对照组。提取两组新生儿外周血基因组DNA，对UGT1A1启动子区TATA盒和外显子1进行PCR扩增并进行基因测序。 结果 病例组检测出33例G71R错义突变，突变率为39%，A等位基因频率（21%）显著高于健康对照组（10%）（P<0.05）。携带G71R错义突变基因型的侗族新生儿发生高胆红素血症的风险是携带野生型的健康新生儿的2.588倍（P<0.05）。Hardy-Weinberg遗传平衡检验结果提示两组新生儿UGT1A1 G71R位点基因型符合遗传平衡（P>0.05）。 结论 UGT1A1 G71R突变是三江县侗族新生儿高频基因变异类型，且G71R错义突变与侗族新生儿发生高胆红素血症相关。

Abstract:

Objective To study the characteristics of UGT1A1 gene mutations in Dong neonates in Sanjiang County of Liuzhou and its association with the pathogenesis of hyperbilirubinemia in Dong neonates. Methods A prospective analysis was performed on 84 neonates who were diagnosed with unexplained hyperbilirubinemia in the Department of Neonatology, Sanjiang County People's Hospital, from January 2021 to January 2022. Sixty healthy neonates born during the same period were enrolled as the control group. Peripheral blood genomic DNA was extracted for both groups, and UGT1A1 exon 1 was amplified by PCR and sequenced. Results In the case group, 33 neonates were found to have G71R missense mutation, with a mutation rate of 39%. The case group had a significantly higher frequency of A allele than the healthy control group (21% vs 10%, P<0.05). The risk of hyperbilirubinemia in Dong neonates carrying G71R missense mutation was 2.588 times as high as that in healthy neonates carrying wild-type UGT1A1 gene (P<0.05). Hardy-Weinberg equilibrium testing showed that the UGT1A1 G71R locus was in genetic equilibrium in both groups (P>0.05). Conclusions UGT1A1 G71R mutation is a high-frequency gene mutation type in Dong neonates in Sanjiang County, and G71R missense mutation is associated with hyperbilirubinemia in Dong neonates.