17q25.3 副本数量变化:与神经发育障碍和心脏形有关
Nikhil Shri Sahajpal1, David H F Jeffrey1, Barbara R DuPont1
1Diagnostic Laboratories, Greenwood Genetic Center, Greenwood, SC, 29646, USA.
Molecular cytogenetics
|July 10, 2023
概括
在17q25.3区域的罕见副本数变异 (CNV) 与神经发育和心血管疾病有关. 这项研究强调了这些罕见的基因组变化的表型影响,涉及到特定基因的疾病因果关系.
科学领域:
- 基因组学就是基因组学.
- 人类遗传学 人类遗传学
- 医学遗传学 医学遗传学
背景情况:
- 副本数变异 (CNVs) 是影响个体变异性的常见基因组变异.
- 罕见的复发性CNV与遗传性疾病有关,但罕见的非复发性CNV的作用不太清楚.
- 17q25.3区域具有丰富的基因,其CNV的表型后果需要进一步研究.
研究的目的:
- 调查17q25.3区域中罕见的非复发性CNV的临床特征和基因型-表型相关性.
- 为了确定17q25.3 CNVs在一个大队列中的患病率和特征.
- 识别与观察到的表型相关的潜在驱动基因.
主要方法:
- 18,542例染色体微阵列数据 (2010-2022) 的回顾性分析.
- 鉴定和详细的临床特征15个病例与17q25.3 CNVs.
- 与文献数据进行比较,以确定基因型-表型相关性.
主要成果:
- 17q25.3区域的CNV很少见 (0.08%的患病率),具有可变的断点,并且没有最小的重叠区域.
- 最常见的临床特征包括神经发育障碍 (80%),表达性语言障碍 (33%) 和心血管形 (26%).
- 在17q25.3 CNV与神经发育和心脏异常之间发现了显著的关联.
结论:
- 在17q25.3区域的罕见CNV与一系列的临床表型有关,主要是神经发育和心血管疾病.
- 这些发现表明17q25.3区域内的几种基因是这些表型的潜在驱动因素.
- 需要进一步的研究来阐明这些基因型-表型相关性背后的特定遗传机制.
更多相关视频
08:22A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
Published on: December 1, 2017
8.7K
09:30Pre-Implantation Genetic Testing for Aneuploidy on a Semiconductor Based Next-Generation Sequencing Platform
Published on: August 17, 2022
3.1K
相关概念视频
Comparing Copy Number Variations and SNPs
17.8K
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%...
17.8K
Karyotyping
61.8K
Overview
61.8K
Meiosis I
193.8K
Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
193.8K
Genomic Imprinting and Inheritance
34.7K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
34.7K
Autism Spectrum Disorder
161
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.
161
Alternative RNA Splicing
21.4K
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...
21.4K
