汉丹病毒感染通过IRE1α通路诱导人体粘膜相关的不变T细胞烧灭
Yusi Zhang1, He Liu2, Dalu Liu3
1Department of Immunology, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China. immuzys@fmmu.edu.cn.
Communications biology
|April 1, 2025
概括
汉坦病毒感染导致粘膜关联不变T细胞 (MAIT) 在患有综合征 (HFRS) 的出血发烧患者中丧失. 这种损失是由于热,细胞死亡途径由内质网膜压力触发.
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:
- 汉丹病毒 (HTNV) 导致综合征 (HFRS) 导致出血热,这是亚洲的一个重大公共卫生问题.
- 粘膜关联不变T细胞 (MAIT) 对抗病毒感染的先天免疫是至关重要的,但它们在HFRS患者中的减少尚不清楚.
- 以前的体外研究表明MAIT细胞具有抗病毒作用,但其体内功能和HTNV诱导的MAIT细胞缺乏背后的机制仍然不清楚.
研究的目的:
- 为了研究MAIT细胞在Hantaan病毒感染期间体内的作用.
- 为了阐明负责HTNV诱导的MAIT细胞缺乏在发烧和综合征患者出血发烧的分子机制.
- 确定在HFRS期间稳定MAIT细胞群的潜在治疗点.
主要方法:
- 来自HFRS患者的临床样本的分析.
- 使用MAIT细胞缺陷小鼠模型.
- 在MAIT细胞的体外感染模型.
- 调查过载,内分泌网膜 (ER) 应激和热的途径.
主要成果:
- 热症被确定为MAIT细胞在HFRS患者外周血液中丧失的主要原因.
- HTNV感染导致MAIT细胞中的过载,引发因诺西特需要酶-1α (IRE1α) 介导的ER压力和随后的热亡.
- 已经证明,抑制ER压力可以在HTNV感染期间逆转MAIT细胞热致死.
结论:
- 这项研究揭示了由HTNV感染引起的HFRS患者MAIT细胞缺陷背后的分子机制.
- 这些发现突显了ER压力和热在HTNV诱导的MAIT细胞损失中的关键作用.
- 准ER压力通路是一个潜在的治疗策略,可以在HFRS中保存MAIT细胞群.
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