通过Sjögren病的翻译后修改发现潜在的新表位
bioRxiv : the preprint server for biology
|January 9, 2026
概括
翻译后修改 (PTMs) 可以改变Sjögren综合征 (SjD) 自抗原与HLA-DR3的结合方式. PTM模仿显示T细胞反应增强,表明在SjD免疫性中起作用.
科学领域:
- 免疫学 免疫学 免疫学
- 自免疫性疾病 自免疫性疾病
- 计算生物学 计算生物学
背景情况:
- 肖格伦综合征 (SjD) 是一种慢性自身免疫性疾病,影响产生水分的腺体.
- 人类白细胞抗原 (HLA) 类II分子HLA-DR3与SjD密切相关.
- 翻译后修改 (PTMs) 可能会影响SjD自身抗原的呈现.
研究的目的:
- 研究PTM如何影响与SjD相关的自身抗原与HLA-DR3.3的结合.
- 分析PTM模仿对自身抗原呈现和T细胞反应的影响.
主要方法:
- 分析PTM模仿与HLA-DR3结合的计算框架.
- 对符合PTM条件的部位进行全长SjD自身抗原序列 (Ro60,Ro52,La) 的分析.
- 对PTM模仿和T细胞反应的实验验证.
- -DR3复合物的结构建模.
主要成果:
- 在位上的PTM替代通常会降低预测的结合亲和力.
- 在Ro60,Ro52和La autoantigens的特定地区,PTM资格地点的密度很高.
- 实验验证显示,T细胞对PTM模仿的反应增强,与增加的HLA-DR3结合有关.
- 结构建模表明由于PTM模拟物而改变的-DR3相互作用.
结论:
- PTMs可以以HLA-DR3依赖的方式影响T细胞对自身抗原的呈现.
- PTM模仿可以改变SjD自身抗原的免疫性.
- 这些发现提供了对SjD病变的洞察力,以及针对T细胞反应的潜在治疗策略.
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