T细胞激活不足以驱动SIV疾病的进展
Cristian Apetrei1,2,3, Thaidra Gaufin3, Egidio Brocca-Cofano4
1Division of Infectious Diseases, Department of Medicine, and.
JCI insight
|July 24, 2023
概括
非洲绿通过控制炎症而抵抗SIV疾病,而不仅仅是T细胞激活. 保持肠道完整性对于预防自然SIV宿主疾病进展至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 灵长类动物学 灵长类动物学
背景情况:
- 在非洲绿 (AGMs) 中,T细胞激活和炎症对于控制 Simian Immunodeficiency Virus (SIV) 感染至关重要.
- 这些过程经常混杂在一起,但有不同的起源:T细胞激活源于获得的免疫力,而炎症则源于对粘膜损伤的先天反应.
研究的目的:
- 为了调查单独的系统性T细胞激活是否独立于炎症,驱动SIV疾病的进展.
- 在AGM中早期SIV感染期间通过耗尽调节性T细胞 (Tregs) 来将T细胞激活与炎症分离.
主要方法:
- 调控性T细胞 (Treg) 耗尽使用在SIV感染的AGM中使用Ontak (甲菌毒素与甲菌毒素相结合的甲蛋白-2).
- 评估T细胞激活,肠道屏障完整性,微生物转位,炎症和巨细胞激活.
- 监测SIV复制动态和CD4+T细胞恢复.
主要成果:
- 在急性感染后,Treg减弱取消了T细胞激活的控制,但没有影响肠道完整性,微生物转移或炎症.
- 克的使用增加了巨细胞的数量,但降低了它们的激活.
- 持续的T细胞激活加速了病毒复制,并延迟了CD4+T细胞的恢复,而不会引起疾病迹象.
结论:
- 仅仅系统性T细胞激活不足以驱动SIV疾病的进展.
- 控制系统性炎症,可能通过维持肠道完整性,是使AGM等自然宿主中非进展性SIV感染成为可能的主要因素.
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