基础医学与临床 ›› 2015, Vol. 35 ›› Issue (8): 1011-1014.

• 研究论文 •    下一篇

一个中国G6PD缺乏症家系致病基因的突变分析

林美华1,陈业达1,欧阳平1,赵翔2,谭艺青2,赵小蕾2,覃继恒2,饶绍奇1   

  1. 1. 广东医学院 医学系统生物学研究所与公共卫生学院
    2. 广东医学院
  • 收稿日期:2015-01-28 修回日期:2015-04-26 出版日期:2015-08-05 发布日期:2015-07-15
  • 通讯作者: 饶绍奇 E-mail:raoshaoq@gdmc.edu.cn
  • 基金资助:
    国家自然科学基金项目;广东省科技计划攻关项目;东莞市科技重点项目

Mutation analysis of the pathogenic gene in a Chinese family with G6PD deficiency

  • Received:2015-01-28 Revised:2015-04-26 Online:2015-08-05 Published:2015-07-15

摘要: 目的 对一个葡萄糖-6-磷酸脱氢酶(G6PD)缺乏症家系成员G6PD基因13个外显子全面测序,识别致病的突变位点及其遗传模式。方法 在G6PD缺乏症高发区广东惠州地区收集到一个G6PD缺乏症核心家系,包括先证者(儿子)、患病母亲和正常父亲。取家系成员的外周血样,并提取基因组DNA,用PCR和DNA测序法对G6PD基因全部外显子进行序列分析。结果 先证者及其母亲在G6PD基因第2号外显子出现同一点突变(c.95A>G,p.His32Arg),该突变引起组氨酸被精氨酸替换(CAC>CGC)。然而先证者父亲在G6PD基因的13个外显子均未出现突变。3种生物信息学软件均预测该突变对蛋白质功能具有较强的危害性。结论 该家系中c.95A>G呈X连锁显性遗传,是G6PD缺乏症的致病突变位点之一。

关键词: 关键词:葡萄糖-6-磷酸脱氢酶, 基因突变, 外显子测序

Abstract: Objective In order to recognize the underlying mutation site as well as its inheritance model, all the thirteen exons of G6PD gene were sequenced for a family trio with G6PD deficiency. Methods We collected the family trio with G6PD deficiency in Huizhou of Guangdong Province, a region of high prevalence of G6PD deficiency. The family trio includes the proband, his affected mother and healthy father.Their blood samples were collected and genomic DNA were extracted. Sequence analysis was performed in thirteen exons by PCR and DNA sequencing. Results The results indicated that the proband and his mother shared an identical mutation (c.95A>G, p.His32Arg) in exon 2 of G6PD gene. This mutation causes histidine to be replaced with arginine (CAC>CGC). However, no single mutation was found in his father. Three bioinformatics tools predicted that this mutation is detrimental to the function(s) of its associated protein. Conclusions The mutation, c.95A>G, following an X-linked dominant inheritance model, is a causal site for G6PD deficiency.

Key words: Keywords: Glucose-6-phosphate dehydrogenase, gene mutation, exon sequencing

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