用外体测序无法解决的病例的基因组测序:在30年前的病例中确定TBCK中的单个外体删除
Maureen Jacob1,2, Melanie Brugger1,2, Stephanie Andres3
1Institute of Human Genetics, Klinikum rechts der Isar, Technical University of Munich, School of Medicine and Health, Munich, Germany.
Neuropediatrics
|March 28, 2024
概括
基因组测序 (GS) 检测到TBCK中错过的单个外显子删除,改善了神经发育障碍 (NDD) 诊断. 这突出了GSGS的重点.
科学领域:
- 遗传学 遗传学 是一个
- 神经发育障碍 神经发育障碍
- 基因组医学是基因组医学.
背景情况:
- 外体序列测序 (ES) 是诊断神经发育障碍 (NDD) 的黄金标准,但仅在~40%的病例中确定单一的原因.
- 对于NDDs,仍然存在显著的诊断差距,需要先进的基因组方法.
研究的目的:
- 报告一个病例,其中基因组测序 (GS) 识别了在患有深度NDD的患者中,标准外基因组测序 (ES) 遗漏的致病变体.
- 强调GS的诊断实用性,用于检测NDD中的单个外因子删除.
主要方法:
- 从冷组织和父母血液中提取DNA.
- 基因组测序 (GS) 分析结构变异和单核酸变异 (SNVs) /indels.
- 将GS发现与之前的外体序列 (ES) 数据进行比较,特别是评估副本数变异 (CNV) 检测算法.
主要成果:
- GS在TBCK中发现了双变体,包括一个新的框架转移变体和23号外因子的删除,在一个患有深度NDD的患者中.
- 已知导致TBCK综合征的原因TBCK中的23外因子删除被ES中使用的CNV检测算法ExomeDepth遗漏.
- 虽然ES确定了移变异,但未能检测到内基因缺失.
结论:
- 基因组测序为检测挑战外基因组测序分析的单个外因子删除提供了附加值.
- 在患有NDD的患者中,TBCK中23号外因子的删除可能被低诊断.
- 通过GS进行分子解剖对于遗传咨询和解决长期存在的诊断难题至关重要.
相关概念视频
Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
Genome-wide Association Studies-GWAS
13.4K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
13.4K


