在家族性多发性硬化症中增加了GWAS相关基因罕见变异的负担
Aleksander Turk1,2, Aleš Maver1, Peter Juvan1
1Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia.
Scientific reports
|July 1, 2025
概括
多发性硬化症 (MS) 相关基因中的罕见遗传变异显著增加了家族性MS风险. 这项研究强调了这些罕见变异在家族性MS患者遗传倾向中的作用.
科学领域:
- 遗传学 遗传学 是一个
- 神经免疫学 神经免疫学
- 神经退行性疾病 神经退行性疾病
背景情况:
- 多发性硬化症 (MS) 是一种复杂的神经退行性疾病,具有已知的遗传风险因素.
- 全基因组关联研究 (GWAS) 已经确定了具有小影响的常见变异,但罕见变异的作用不太清楚.
- 与零星性MS (SMS) 相比,家族性MS (FMS) 可能受到罕见变异的影响,其影响更大.
研究的目的:
- 调查假设,GWAS识别的MS相关基因中的罕见变异对FMS风险的贡献比SMS风险更大.
- 评估与对照组相比,FMS和SMS患者的GWAS相关基因中罕见,预测致病性 (RPP) 变异的负担.
主要方法:
- 对111个GWAS相关基因内的罕见遗传变异的分析.
- 研究队列包括87名FMS患者,89名SMS患者和3866名对照.
- 在FMS和SMS队列中评估RPP变体的频率和过度代表性.
主要成果:
- 与对照组相比,RPP变异在FMS队列中明显过度代表 (p <5.27 × 10−74).
- 与对照组相比,在SMS队列中没有观察到RPP变异频率的显著增加 (p = 1.00).
- 六个特定的基因 (ALPK2,ANKRD55,INTS8,IQCB1,JADE2,MALT1) 显示对FMS中RPP变异负担有显著的贡献.
结论:
- 在GWAS鉴定基因中的罕见变异在家族性MS的遗传倾向中发挥着重要作用.
- 这些发现强调了研究罕见变异对了解多发性硬化症病因的重要性,特别是在家族病例中.
- 该研究确定了可能导致FMS风险的特定基因,需要进一步调查.
相关概念视频
Genome-wide Association Studies-GWAS
14.4K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
14.4K
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
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
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


