大西洋鱼抗病毒反应的基因组监管格局
Shahmir Naseer1, Thomas C Clark1, Bertrand Collet2
1University of Aberdeen.
Genome research
|October 22, 2025
概括
大西洋鱼的抗病毒免疫包括特定的干扰素刺激基因 (ISG) 和转录因子. 这项研究揭示了它们对病毒模拟的免疫反应至关重要的调节元素和保存途径.
科学领域:
- 基因组学和分子生物学
- 免疫学 免疫学 免疫学
- 进行比较基因组学.
背景情况:
- 脊椎动物对病毒感染具有协调的先天免疫反应,由干扰素刺激基因 (ISG) 介导.
- 在这些抗病毒反应中存在显著的物种间变异,特别是在像大西洋鱼这样的远鱼中,这些鱼经历了全基因组复制 (WGD).
- 了解抗病毒基因表达的调控基础对于理解免疫系统功能和进化至关重要.
研究的目的:
- 研究治理大西洋鱼 (Salmo salar) 抗病毒基因表达反应的全基因组调节机制.
- 识别干扰素反应中涉及的保存和新型调节元素和转录因子.
- 探索全基因组复制对抗病毒免疫的演变的影响.
主要方法:
- 大西洋鱼的系统性刺激使用聚氨酸:聚乙酸 (聚I:C),一种合成病毒模仿剂.
- 使用mRNA-seq. 的转录组分析.
- 在造血和淋巴组织中使用ATAC-seq和ChIP-seq (H3K27ac和H3K27me3) 的表观基因组分析.
主要成果:
- 确定了197个ISG,其调控元素显示在聚I:C刺激时,染色质可访问性和H3K27ac信号增加.
- 在大西洋鱼,彩虹鱼,斑马鱼和人类中发现了54种保存的ISG,这些ISG是由保存的转录因子 (例如,IRF8,STAT1) 调节的.
- 在与鱼类WGD相关的激活ISG促进体中,证明了ISRE动机的相对物特异性丰富.
结论:
- 大西洋鱼表现出复杂的抗病毒免疫的监管格局,受保护和teleost特定因素的影响.
- 该研究强调了特定的转录因子和调控元素在调解干扰素反应中的作用.
- 全基因组复制塑造了鱼类抗病毒免疫的演变,这对养殖鱼类的健康有影响.
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