在Paralichthys olivaceus的抗原刺激后,主要基因相容性复合体的表达和免疫特征
Jing Xing1,2, Zhaoxia An1, Xiaoqian Tang1,2
1Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
Biology
|December 22, 2023
概括
鱼中的主要组织相容性复合体II (MhcII) 在适应性免疫中起着关键作用. 这项研究描述了MhcII的表达和功能,揭示了其在抗原呈现和对病原体的免疫反应中的重要性.
科学领域:
- 免疫学 免疫学 免疫学
- 海洋生物学 海洋生物学
- 遗传学 遗传学 是一个
背景情况:
- 主性基因相容性复合体 (MHC) 对免疫反应至关重要,涉及抗原呈现和T细胞激活.
- 了解Mhc II类 (MhcII) 功能对于适应性免疫研究至关重要,特别是在远程实验中.
研究的目的:
- 为了克隆和表征 (Paralichthys olivaceus) 的mhcIIα和mhcIIβ基因.
- 在各种免疫挑战下调查鱼中MhcII的分布和表达模式.
- 阐明MhcII在抗原呈现和teleosts适应性免疫中的作用.
主要方法:
- 鱼mhcIIα和mhcIIβ基因的克隆.
- 对MHCII细胞外区域的多克隆抗体的产生.
- 在组织和细胞 (,,PBLs) 中MhcII分布的分析.
- 流细胞测量以评估MhcII表达和与免疫细胞标记物 (CD83,IgM,CD4,CD8) 共同定位.
- 用抗原 (细菌,病毒,PHA,ConA,polyI:C,LPS) 刺激后的基因表达分析.
主要成果:
- 鱼mhcIIα和mhcIIβ基因被成功克隆,分别编码了235和246个氨基酸.
- 在,和外周血液白细胞 (PBLs) 中观察到显著的MhcII表达.
- 在白细胞上与CD83和IgM共定位的MhcII分子,但不在T淋巴细胞亚群上.
- 在细菌和病毒挑战后,MhcII表达上调,在PHA和ConA刺激后显著增加.
- 与CD4+T淋巴细胞变异相关的MhcII表达变化,表明T细胞依赖抗原反应中的作用.
结论:
- 黄MhcII主要表达在B细胞和树突细胞上,在抗原呈现中发挥关键作用.
- MhcII对外源性和T细胞依赖性抗原表现出显著的反应,突显了其在远端细胞免疫力中的重要性.
- 这些发现为研究远鱼细胞免疫力提供了宝贵的参考.
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