[单个中心中DMD基因变异的分析]
1Genetics and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
Zhonghua er ke za zhi = Chinese journal of pediatrics
|January 24, 2024
概括
中国患者的杜恩 (DMD) 和贝克尔肌肉发育不良 (BMD) 遗传变体显示,外原缺失是最常见的DMD基因变体. 这项研究分析了2,690名患者,确定了2,618名患有致病性DMD变体的患者.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 临床遗传学 临床遗传学
背景情况:
- 杜恩肌肉发育不良 (DMD) 和贝克尔肌肉发育不良 (BMD) 是由DMD基因变异引起的遗传性神经肌肉疾病.
- 了解特定人群中DMD基因变异的谱系对于准确的诊断和遗传咨询至关重要.
- 中国人口的DMD遗传景观需要详细的调查.
研究的目的:
- 在被诊断患有杜琴 (DMD) 和贝克尔肌肉发育不良 (BMD) 的中国患者中调查DMD基因变异的谱.
- 在大量儿科患者中分析致病性DMD变异的频率和类型.
- 在被研究的人群中识别任何新的DMD基因变异.
主要方法:
- 一项横截面研究分析了2,690名与DMD/BMD无关的患者 (0-18岁) 的临床和遗传数据.
- 基因分析采用多重结合依赖的探头放大,下一代测序面板,桑格测序和PCR放大.
- 对收集的临床信息和基因检测结果进行了描述性分析.
主要成果:
- 在2,618名患者 (97.3%) 中发现了致病性DMD基因变异.
- 大量的删除占大多数 (71.6%),其次是小变体 (19.6%) 和重复 (8.8%).
- 最常见的删除涉及3个表基;热点删除影响了45-50个表基. 子2是最常见的重复部位. 46个小变种以前没有报告.
结论:
- 子删除是研究中华人群中DMD基因变异的主要类型.
- 小变异和外因子重复代表着DMD/BMD的重要原因,尽管不那么常见.
- 这些发现突显了DMD/BMD的遗传异质性以及综合基因检测的重要性.
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