在波兰家庭中,在导致智力障碍和的基因中检测到新的潜在致病变体
S Skoczylas1, P Jakiel2, T Płoszaj2
11Department of Clinical Genetics, Medical University of Lodz, Lodz, Poland. sebastian.skoczylas@umed.lodz.pl.
Neurogenetics
|July 5, 2023
概括
使用定向下一代测序 (tNGS) 的基因测试确定了核和线粒体DNA (mtDNA) 中的致病变体,导致一些患者的智力障碍 (ID) 和. 需要进一步调查,因为许多病例仍未被诊断出来.
科学领域:
- 遗传学 是一个遗传学.
- 神经学 神经学
- 分子生物学分子生物学
背景情况:
- 智力障碍 (ID) 影响全球人口的1-3%,相关基因的数量越来越多.
- 新的基因关联和特定的表型特征用于遗传变化的不断被发现.
- 了解ID和的遗传基础对于诊断和治疗至关重要.
研究的目的:
- 为了确定负责中度至重度智力障碍和的基因中的病原性变异.
- 为诊断目的使用目标下一代测序 (tNGS) 面板.
- 评估分析核DNA (nuDNA) 和线粒体DNA (mtDNA) 的诊断产量.
主要方法:
- 研究了73名患有ID,或两者的患者队列.
- 针对性下一代测序 (tNGS) 在核DNA (nuDNA) 上进行.
- 从tNGS数据中提取了一组患者的高覆盖线粒体DNA (mtDNA).
主要成果:
- 确定了52种罕见的nuDNA变体和11种罕见的mtDNA变体.
- 对10种最具破坏性的nuDNA变异进行了详细的临床分析.
- 七个nuDNA变异和一个mtDNA变异被证实是引起疾病的.
结论:
- 很大一部分ID和患者仍未被诊断出来,这表明非遗传原因或当前检测方法的局限性.
- 对线粒体DNA (mtDNA) 基因组的分析对ID诊断具有临床意义.
- 大约1%的ID患者可能在mtDNA中存在致病变体.
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