在尼罗河鱼 (Oreochromis niloticus) 中CD22的分子特性和表达分析及其在免疫反应中的潜在作用
Qi Ye1, Jimin Niu1, Yu Huang1,2
1Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture & Key Laboratory of Control for Disease of Aquatic Animals of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China.
Biology
|January 28, 2026
概括
研究人员在尼罗河鱼中发现了On-CD22,这是一种哺乳动物CD22的鱼类同类物. 该基因在免疫组织和B细胞中表达,这表明它在鱼类免疫调节中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 鱼类生物学 鱼类生物学
- 分子生物学分子生物学
背景情况:
- CD22是一种Siglec家族成员,对哺乳动物B细胞功能至关重要.
- CD22在远鱼免疫力中的作用基本上是未知的.
研究的目的:
- 在尼罗河鱼 (Oreochromis niloticus) 中识别和描述CD22同类物.
- 为了研究这种鱼CD22同类物 (On-CD22) 的表达模式和潜在的免疫功能.
主要方法:
- 从尼罗河鱼中克隆了On-CD22基因.
- 在各种组织和不同免疫刺激下进行定量表达分析 (细菌感染,多种I:C)).
- 亚细胞局部化研究和 luciferase 记者测试.
- 头白细胞的单细胞转录组分析.
主要成果:
- 在健康鱼的头部和血液中,CD22转录的高度表达.
- 在感染了Streptococcus agalactiae或Aeromonas hydrophila后,表达水平发生了显著的变化,并进行了多种I:C刺激.
- 在CD22上定位在血上,并调节NF-κB,IFN和STAT1促进器活动.
- 单细胞分析证实了On-CD22表达主要在头白细胞内的B细胞中.
结论:
- 在CD22是一种尼罗河 CD22同类物,具有保存的免疫相关特征.
- 在-CD22主要表达在B细胞中,可能在调节小症患者的免疫反应中发挥作用.
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