在自闭症谱系障碍中异位新突变的模式和速率
Benjamin M Neale1, Yan Kou, Li Liu
1Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA.
Nature
|April 13, 2012
概括
识别自闭症谱系障碍 (ASD) 的遗传风险因素至关重要. 这项研究发现,虽然de novo突变起作用,但它们分布在许多基因中,并且往往不完全透,支持ASD的多基因模型.
科学领域:
- 遗传学 是一个遗传学.
- 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:
- 自闭症谱系障碍 (ASD) 的病因是复杂的,涉及遗传和环境因素,在少数病例中发现了特定的原因.
- 了解ASD的遗传结构对于开发有效的诊断和治疗策略至关重要.
研究的目的:
- 调查新突变对自闭症谱系障碍遗传基础的贡献.
- 通过外基因测序识别ASD的新型遗传风险因素.
主要方法:
- 对175个自闭症谱系障碍三组 (病例及其父母) 进行了整体外基因组测序.
- 分析新的误解和无意义变体.
- 蛋白质与蛋白质相互作用网络分析以评估基因连接性.
主要成果:
- 在46.3%的自闭症病例中发现了De novo错误或无意义的变体,突变率的整体增加很小.
- 携带de novo突变的基因表现出相互之间以及与先前识别的ASD基因之间的连接性增加.
- 遗传模型表明,de novo事件在很大程度上与ASD无关,但那些赋予风险的事件是多基因的和不完全透的.
结论:
- 新的点突变在ASD病因学中起着有限但重要的作用,与新的副本数变异的发现一致.
- 结果支持多基因模型,其中许多基因的自发编码突变增加了ASD风险 (5至20倍).
- CHD8和KATNAL2被确定为真正的自闭症风险因素.
相关概念视频
01:19Autism Spectrum Disorder
Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
02:26Comparing Copy Number Variations and SNPs
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...