跨eQTL映射优先考虑USP18作为狼风险位的干扰素反应的负调节器
Krista Freimann1,2, Anneke Brümmer3,4, Robert Warmerdam5,6
1Institute of Computer Science, University of Tartu, Tartu, Estonia.
Nature communications
|October 2, 2025
概括
这项研究通过分析跨表达量化特征位点 (trans-eQTL) 数据,确定了影响复杂特征的遗传位点. 一项关键发现将USP18基因与系统性红斑狼 (SLE) 风险联系起来,通过影响干扰素信号传递.
科学领域:
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
- 系统生物学 系统生物学
背景情况:
- 全基因组关联研究 (GWAS) 提供了对复杂特征的洞察力,但难以确定因果基因.
- 将遗传关联转化为生物机制需要先进的分析方法.
研究的目的:
- 确定强大的跨eQTL位点及其与复杂疾病的相关性.
- 研究与系统性红斑狼 (SLE) 相关的遗传变异的功能后果.
主要方法:
- 在3734个淋巴细胞细胞系样本中进行了转表达定量特征位点 (trans-eQTL) 的元分析.
- 在一个独立的多民族数据集 (682个人) 中重复发现.
- 局部化跨eQTL信号与SLE的GWAS数据.
主要成果:
- 鉴定了四个强大的trans-eQTL位点,其中一个位点在无胺特异性酶18 (USP18) 位点进行复制.
- USP18 跨-eQTL 信号与 SLE.GWAS 信号共定位.
- SLE风险等位基因增加了50个干扰素诱导基因的表达,损害了USP18对干扰素信号的负调节.
- 这种特定的USP18跨eQTL信号在全血样本中无法检测,突出了特定环境的影响.
结论:
- USP18中的遗传变异通过调节干扰素反应来影响SLE风险.
- 跨eQTL分析对于识别传统GWAS错过的特定环境遗传效应至关重要.
- 了解组织特异性遗传调节对于解释GWAS发现和疾病机制至关重要.
相关概念视频
Regulation of the Unfolded Protein Response
2.9K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.9K
Non-LTR Retrotransposons
13.2K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
13.2K
The Unfolded Protein Response
6.2K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
6.2K


