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中华诊断学电子杂志 ›› 2021, Vol. 09 ›› Issue (01) : 17 -21. doi: 10.3877/cma.j.issn.2095-655X.2021.01.005

所属专题: 经典病例 文献

病例诊断思维

母系遗传糖尿病伴耳聋综合征的临床特征及基因分析
徐倩1, 章诗琪1, 夏莉1, 章秋1, 郑萍萍1, 邓大同1,()   
  1. 1. 230022 合肥,安徽医科大学第一附属医院内分泌与代谢研究所 内分泌科
  • 收稿日期:2020-06-20 出版日期:2021-02-10
  • 通信作者: 邓大同
  • 基金资助:
    安徽医科大学第一附属医院博士基金(1313)

Clinical characteristics and genetic analysis of a family with maternally inherited diabetes and deafness

Qian Xu1, Shiqi Zhang1, Li Xia1, Qiu Zhang1, Pingping Zheng1, Datong Deng1,()   

  1. 1. Department of Endocrinology, Institute of Endocrinology & Metabolism, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
  • Received:2020-06-20 Published:2021-02-10
  • Corresponding author: Datong Deng
引用本文:

徐倩, 章诗琪, 夏莉, 章秋, 郑萍萍, 邓大同. 母系遗传糖尿病伴耳聋综合征的临床特征及基因分析[J]. 中华诊断学电子杂志, 2021, 09(01): 17-21.

Qian Xu, Shiqi Zhang, Li Xia, Qiu Zhang, Pingping Zheng, Datong Deng. Clinical characteristics and genetic analysis of a family with maternally inherited diabetes and deafness[J]. Chinese Journal of Diagnostics(Electronic Edition), 2021, 09(01): 17-21.

目的

探讨母系遗传糖尿病伴耳聋综合征(MIDD)家系临床特征及基因突变。

方法

选择安徽医科大学第一附属医院内分泌与代谢病科2020年4月20日收治的1例MIDD患者,采集其4位家系成员外周血,采用聚合酶链反应对线粒体基因(mtDNA)进行高敏感性测序分析,以明确是否有mtDNA突变。

结果

参与检测的4位家庭成员中,2例患有MIDD;1例成员有听力下降,但尚未表现为糖尿病;1例成员尚未有听力下降及血糖异常表现。4位家庭成员均有mtDNA 3243 A>G点突变,其中3位有mtDNA 10398 A>G突变与mtDNA 15043 G>A突变。

结论

本例MIDD患者临床表现较为典型,符合发病早、体型瘦、伴有神经性耳聋及母系遗传的特点;mtDNA 3243 A>G突变为该家系发病的主要原因。

Objective

To explore the clinical characteristics and gene mutations of a family with maternally inherited diabetes and deafness (MIDD).

Methods

A diabetic patient with a family history of MIDD admitted to the Department of Endocrinology and Metabolic Diseases of the First Affiliated Hospital of Anhui Medical University on April 20, 2020 was enrolled. The peripheral blood specimens of the 4 family members were collected, sent for examination and subjected to polymerase chain reaction was used for high-sensitivity sequencing analysis of mitochondrial DNA (mtDNA) to determine whether there were mtDNA mutations.

Results

Among the 4 family members involved in the test, 2 patients had MIDD, 1 member had hearing loss but did not have diabetes, and 1 member had no hearing loss or abnormal blood sugar. And the 4 family members had mtDNA 3243 A>G mutation, of which 3 had mtDNA 10398 A>G mutation and mtDNA 15043 G>A mutation.

Conclusions

The clinical manifestations of MIDD in this family are quite typical, which are consistent with the characteristics of early onset, thin body type, neurological deafness and maternal inheritance. The mtDNA 3243 A>G mutation is the main cause of MIDD in this family.

图1 母系遗传糖尿病伴耳聋综合征患者一家系谱图
图2 母系遗传糖尿病伴耳聋综合征家系成员mtDNA 3243 A>G突变位点图像
表1 母系遗传糖尿病伴耳聋综合征家系先证者线粒体基因组多态性位点信息
表2 Ⅲ3线粒体基因组多态性位点信息
表3 Ⅳ1线粒体基因组多态性位点信息
表4 母系遗传糖尿病伴耳聋综合征家系成员mtDNA 3243位点基因突变情况及临床特点
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