在PNPLA2基因中的多态 rs61876744和沙特队列中的角菌之间的关联
Altaf A Kondkar1,2,3, Taif A Azad1, Tahira Sultan1
1Department of Ophthalmology, College of Medicine, King Saud University, Riyadh 11411, Saudi Arabia.
Genes
|December 23, 2023
概括
沙特阿拉伯人的遗传分析表明PNPLA2基因多态 rs61876744可能会提供对角菌 (KC) 的保护. 需要进一步的大规模研究来证实这种与KC病因学的关联.
科学领域:
- 遗传学 遗传学 是一个
- 眼科医生 眼科 眼科
- 人口遗传学 人口遗传学
背景情况:
- 沙特阿拉伯原籍的中东阿拉伯人中Keratoconus (KC) 的遗传基础在很大程度上仍未确定.
- 之前的全基因组研究表明,KC易感性与PNPLA2 (rs61876744) 和CSNK1E (rs138380) 附近的位置有关.
- 假设APOE基因多态 (rs429358,rs7412) 和它们的等位基因变体 (ε2, ε3, ε4) 通过氧化应激影响KC.
研究的目的:
- 调查沙特人口中特定的基因多态 (rs61876744,rs138380) 和APOE基因型 (rs429358,rs7412),与KC之间的关联.
- 探索这些基因变异在KC发育中的潜在保护性或风险转移作用.
主要方法:
- 一项涉及98名KC患者和167名来自沙特阿拉伯的健康对照者的病例控制研究.
- 使用TaqMan试验进行rs61876744和rs138380的基因型鉴定.
- 桑格测序用于rs429358和rs7412的基因定型,以确定APOE等位基因变异.
主要成果:
- 在PNPLA2中rs61876744(T) 的等位基因频率显示出对KC (OR=0.64) 的潜在保护作用,尽管在多次测试校正后,该效应在统计学上并不显著.
- 在主导模型下,rs61876744基因型显示出适度显著的保护作用 (OR=0.53,p=0.013).
- 对于rss138380,rs429358和rs7412的多态,没有发现与KC的显著关联. APOE ε2 载体表现出非显著的趋势,即增加了 KC 风险 (p=0.055).
结论:
- 在PNPLA2基因中的多态 rs61876744可能与沙特人口中的KC有关,可能具有保护作用.
- 需要进一步进行大规模的遗传关联研究,以验证这种PNPLA2位点在Keratoconus中的作用.
- 目前的发现不支持CSNK1E,APOE多态或APOE基因型与该队列中的KC有显著的关联.
相关概念视频
Single Nucleotide Polymorphisms-SNPs
15.1K
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,...
15.1K
Comparing Copy Number Variations and SNPs
17.7K
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%...
17.7K
Genome-wide Association Studies-GWAS
13.4K
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...
13.4K
Pleiotropy
40.5K
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,...
40.5K


