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部分GCK基因删除突变导致年轻人的成熟期糖尿病

Ruiqi Yu¹, Haichen Zhang^1,2, Xinhua Xiao³

¹Key Laboratory of Endocrinology of National Health Commission, Diabetes Research Center of Chinese Academy of Medical Sciences, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, China.

Acta diabetologica

|September 13, 2023

概括

副本数变异 (CNVs) 可能导致青少年成熟期糖尿病 (MODY) 的误诊. 这项研究在中国一家的GCK基因中发现了一个exon 8-10删除,强调了CNV检测对于准确的MODY诊断的重要性.

科学领域:

遗传学是一个遗传学.
内分泌学在内分泌学.
分子生物学分子生物学

背景情况:

年轻人成熟期糖尿病 (MODY) 是一种单一的糖尿病形式,最常见的类型是葡萄糖酶-MODY (GCK-MODY).
对MODY的基因测试通常使用测序,可能会错过副本数变异 (CNV).

研究的目的:

描述一个中国家庭GCK基因被删除的诊断过程.
研究 CNVs 在 GCK-MODY 诊断中的作用.
扩大对GCK基因突变谱的理解.

主要方法:

通过采访和记录审查收集了临床数据和病史.
进行了桑格尔测序和整个外因组测序 (WES).
基于WES的CNV检测和多重结合依赖放大剂量测定 (MLPA) 用于验证.
审查了之前报告的GCK基因缺失病例.

主要成果:

通过基于WES的CNV检测,在GCK基因中发现了一种异构成的exon 8-10删除.
标准测序方法 (Sanger和WES用于SNVs/indels) 没有检测到这种删除.
确定的删除被归类为致病性.
GCK基因缺失的临床表现与单个核酸变异或小的缺陷引起的类似.

结论:

这项研究增强了对GCK基因突变的理解,特别是删除.
CNV检测对于MODY的精确遗传诊断至关重要.
这凸显了标准测序在检测某些病原体变异方面的局限性.

关键词:

副本数量变化的变化在删除前的删除.在GCK-MODYY中使用.单一的糖尿病单一的糖尿病

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