JunB对于CD8+T细胞对急性感染的反应是必需的
Shukla Sarkar1, Naoyuki Taira1, Tsung-Han Hsieh1
1Immune Signal Unit, Okinawa Institute of Science and Technology, Graduate University (OIST), Onna-son, Okinawa 904-0495, Japan.
International immunology
|October 19, 2024
概括
JunB对于细胞毒性CD8+T细胞反应至关重要,促进它们的生存,分化和功能. 它的缺失会损害T细胞受体信号传递,并增强共抑制性受体表达.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 基本素拉链转录因子ATF-like (BATF) 和干扰素调节因子4 (IRF4) 对CD8+T细胞发育至关重要.
- JunB在CD8+T细胞反应中的作用以前没有被描述.
研究的目的:
- 阐明JunB在细胞毒性CD8+T细胞反应中的作用.
- 研究JunB在CD8+T细胞分化和功能中的作用背后的分子机制.
主要方法:
- 在T细胞受体刺激后,对CD8+T细胞中JunB表达的分析.
- 在JunB缺乏的小鼠中评估CD8+T细胞的反应,这些小鼠感染了Listeria monocytogenes.
- 缺少JunB的CD8+T细胞的染色质可访问性和基因表达概况.
主要成果:
- 在CD8+ T细胞中,JunB表达是暂时诱导的,取决于T细胞受体信号强度.
- 缺少JunB严重影响CD8+T细胞的克隆扩张,生存和分化.
- 缺乏JunB的CD8+ T细胞表现出BATF/IRF4目标基因的转录和染色质可访问性失调.
- 失去JunB会导致在激活的CD8+T细胞上增加共抑制受体PD-1和TIM-3的表达.
结论:
- JunB对于有效的细胞毒性CD8+T细胞反应是不可或缺的.
- JunB与BATF和IRF4合作,调节CD8+T细胞激活和分化中的关键早期事件.
- JunB在维护CD8+T细胞效应器功能和预防过早衰竭方面发挥着至关重要的作用.
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