在患有神经发育障碍的患者中,X染色体上NVs的患病率
Ekaterina N Tolmacheva1, Anna A Kashevarova2, Elizaveta A Fonova3
1Laboratory of Cytogenetics, Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Ushaika Street 10, Tomsk, 634050, Russia. kate.tolmacheva@medgenetics.ru.
在X染色体上的副本数变异 (CNVs) 在2.8%的神经发育障碍患者中被发现. 在15%的病例中存在X染色体的致病变体,这突显了X染色体无活化分析的重要性.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- X染色体包含许多对大脑发育至关重要的基因.
- 这些基因在男性中的半双相性使复制数变异 (CNVs) 的解释变得复杂.
- 了解X染色体CNV对于诊断神经发育障碍 (NDD) 至关重要.
研究的目的:
- 在患有NDD的患者中研究X染色体上的CNV的频率和光谱.
- 分析X染色体CNVs的临床意义,包括它们的起源和遗传模式.
- 识别导致X相关智力障碍的新型CNV和相关基因.
主要方法:
- 对1175名NDD患者进行了染色体微阵列分析.
- 通过实时定量PCR证实了CNV.
- 通过甲基敏感PCR分析了X染色体无活化模式.
主要成果:
- 在33名患者 (2.8%) 中检测到X染色体CNV.
- 重复和三重复 (27个案例) 比删除 (6个案例) 更频繁.
- 在74%的病例中,CNV来自母亲,在10%的病例中是父亲,在16%的病例中是de novo.
结论:
- 在15%的NDD病例中,X染色体上发现了致病变体.
- 确定了以前未报告的CNV,有助于发现与X链接智力障碍相关的新基因.
- 该研究建议将X染色体失活状态纳入使用ACMG算法对CNV病原性评估.
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
09:30Pre-Implantation Genetic Testing for Aneuploidy on a Semiconductor Based Next-Generation Sequencing Platform
Published on: August 17, 2022
相关概念视频
Comparing Copy Number Variations and SNPs
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%...
Sex-linked Disorders
X-linked Traits
Karyotyping
X and Y Chromosomes
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
Genomic Imprinting and Inheritance
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
