I型干扰素在慢性病毒感染中诱导了一种表观遗传学上独特的记忆B细胞子集
Lucy Cooper1, Hui Xu1, Jack Polmear1
1Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia; Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia.
Immunity
|April 9, 2024
概括
慢性病毒感染会损害记忆B细胞 (MBC) 免疫力. 干扰素信号破坏了MBC的身份,但早期干预可以恢复功能,尽管效果随着时间的推移而减弱.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 记忆B细胞 (MBCs) 对于长期免疫力对抗感染至关重要.
- 慢性病毒感染会损害MBC的功能,阻碍有效的保护.
- 破坏MBC发育的机制及其在慢性感染中的可逆性尚未完全理解.
研究的目的:
- 研究慢性病毒感染如何影响MBC发育和身份.
- 为了确定MBCs中的这些变化是否可逆.
- 确定在病毒感染期间调节MBC身份的关键机制.
主要方法:
- 单细胞ATAC-seq和RNA-seq被用来分析急性和慢性淋巴细胞性脑膜炎病毒感染期间的MBC.
- 作为一种干预策略,使用了对干扰素α/β受体1 (IFNAR-1) 的阻断.
- 评估了MBCs中的染色质可访问性和基因表达变化.
主要成果:
- 在慢性感染期间发现了一种独特的MBC子集,富含干扰素刺激基因 (ISG),与T-bet+子集不同.
- 早期阻断IFNAR-1改变了慢性MBC的染色体格局,降低了与ISG相关的转录因子结合部位的可访问性.
- 干预导致MBC的表型变化,降低ISG亚群和增加CD11c+CD80+细胞,但疗效在感染后4周减少.
结论:
- 干扰素信号传递在慢性病毒感染期间在塑造MBC身份方面发挥着关键作用.
- 针对IFNAR-1的早期治疗干预可以调节MBC种群并恢复免疫功能.
- 干预的时机至关重要,因为MBC在慢性感染后期变得对调制具有抵抗力.
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