一个新的USP27X误解变体在一个智力障碍的个体中被发现
Sukun Luo1, Meng Zhang2, Xiankai Zhang1
1Precision Medical Center, Tongji Medical College, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Huazhong University of Science and Technology, Wuhan, China.
Journal of human genetics
|July 2, 2025
概括
这项研究确定了一种新的USP27X基因变异,与X相关的智力发育障碍-105 (XLID105) 有关. 鉴定出的变体对USP27X功能产生负面影响,扩大了已知的XLID的遗传原因.
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
- 分子生物学分子生物学
背景情况:
- 与X相关的智力障碍 (XLID) 包含具有遗传异质性的多种神经发育障碍.
- 编码二维基因酶的USP27X基因的突变与XLID-105有关,具有智力障碍,发育迟缓和其他神经发育问题.
- 在此之前,只有14名基因诊断为XLID105的个体被报告.
研究的目的:
- 在患者中报告一种新的USP27X变异,其临床特征与XLID-105.5一致.
- 通过功能性研究来调查已识别的USP27X变种的致病性.
- 扩大USP27X相关疾病的临床和遗传谱.
主要方法:
- 进行了三位全外组测序,以确定发育迟缓和认知障碍患者的遗传原因.
- 进行了体外功能测试,以评估新型USP27X变异对基因表达和二维基因化活性的影响.
- 对受影响个体的临床评估包括评估面部特征,发育里程碑和心脏功能.
主要成果:
- 一个新的误解变异,c.257C>T (p.Thr86Met),在一个三岁男孩的USP27X基因中被确定,该男孩患有发育迟缓,言语迟缓,认知障碍和心室隔膜缺陷.
- 鉴定到的变异,从健康的母亲继承,被发现是有害的USP27X表达和duebiquitination活动在体外.
- 功能性研究提供了病原性证据,将新型变种与XLID-105联系起来.
结论:
- 这项研究扩大了USP27X的已知的临床和遗传谱,USP27X是一种与X链接智力发育障碍-105.5相关的基因.
- 在USP27X中发现的p.Thr86Met变体具有病原性,并导致XLID-105表型.
- 这一发现增强了我们对XLID背后的分子机制的理解,并提供了诊断见解.
相关概念视频
Intellectual Disability
167
Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
167
Single Nucleotide Polymorphisms-SNPs
16.0K
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,...
16.0K
Pleiotropy
41.2K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
41.2K
Comparing Copy Number Variations and SNPs
18.0K
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%...
18.0K
Sex-linked Disorders
103.1K
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.
103.1K
Incomplete Dominance
25.6K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
25.6K


