在新变种的背景下,常见的变种增加了先天性隔膜的风险
Lu Qiao1, Carrie L Welch2, Rebecca Hernan3
1Department of Pediatrics, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA.
American journal of human genetics
|September 27, 2024
概括
这项研究确定了先天性隔膜 (CDH) 的新遗传因素,这是一个严重的出生缺陷. 遗传分析显示,罕见和常见的变异都会导致CDH风险,支持多基因模型.
科学领域:
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
- 儿科医学 儿科医学
背景情况:
- 先天性隔膜 (CDH) 是一种严重的出生缺陷,具有已知的遗传联系,但大多数病例仍然无法从遗传学上解释.
- 现有的研究表明,罕见的de novo变异和副本数量的变异是CDH的贡献者.
- 很大一部分CDH病例缺乏明确的遗传诊断,这凸显了进一步调查的必要性.
研究的目的:
- 通过综合的de novo和常见变异分析,识别与先天性隔膜 (CDH) 相关的新型遗传变异和位点.
- 研究CDH的遗传结构,包括罕见和常见遗传变异的贡献.
- 探索遗传风险得分与CDH亚型或de novo变异存在之间的关系.
主要方法:
- 全基因组关联研究 (GWAS) 和de novo变异分析对1469名CDH患者 (1064名三组) 和6133名对照进行.
- 分析的重点是识别与CDH风险相关的罕见,有害的de novo变体和常见变体.
- 计算了多基因风险得分,并将不同的CDH组进行了比较.
主要成果:
- 通过对新变异的分析,确定了15个候选CDH基因,其中包括8个新型基因.
- 通过常见变异发现了与CDH风险相关的两个基因组位置,影响发育模式基因.
- 据估计,常见变异对CDH遗传性有19%的贡献,多基因风险得分在单独和复杂的CDH之间或通过新变异状态没有显著差异.
结论:
- CDH的遗传基础是复杂的,涉及罕见的新突变和常见变异.
- 鉴定到的基因位置位于发育基因的调节区域,这表明在早期发育中发挥了作用.
- 一个多基因模型被支持为先天性隔膜的遗传结构.
相关概念视频
Comparing Copy Number Variations and SNPs
17.6K
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%...
17.6K
Varicose Veins I: Introduction
2
Varicose veins, or varicosities, are abnormally dilated and twisted superficial veins caused by venous valve incompetence. This condition commonly affects the lower extremities, especially the saphenous veins, due to the higher pressure from prolonged standing and walking. However, varicosities can also occur in other areas, such as the esophagus, vulva, spermatic cords, and anorectal region.Etiology and typesPrimary varicose veins, often idiopathic, are more common in women due to inherent...
2
Mutations
80.9K
Overview
80.9K
Single Nucleotide Polymorphisms-SNPs
14.8K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
14.8K
Sex-linked Disorders
101.7K
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
101.7K
Alternative RNA Splicing
21.0K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.0K


