在SIV感染期间,中枢神经系统中的CD4 T细胞反应
Sonny R Elizaldi1, Anil Verma2, Zhong-Min Ma3
1Graduate Group in Immunology, UC Davis, CA, USA.
bioRxiv : the preprint server for biology
|September 4, 2023
概括
尽管有效的抗逆转录病毒疗法 (ART),在神经艾滋病毒的挑战仍然存在. 这项研究揭示了CD4 T细胞在SIV感染期间是中枢神经系统 (CNS) 的关键参与者,即使在病毒抑制后也是如此.
科学领域:
- 神经免疫学 神经免疫学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 抗逆转录病毒疗法 (ART) 改善了艾滋病毒的结果,但未能解决慢性中枢神经系统 (CNS) 炎症 (Neuro-HIV).
- CD4 T 细胞在神经艾滋病毒病变发生过程中至关重要,但它们的中枢神经系统分布,对感染的反应和ART后的恢复知之甚少.
研究的目的:
- 在SIV感染和ART治疗期间,研究中枢神经系统组织内CD4T细胞的分布和功能作用.
- 阐明急性和慢性SIV感染对中枢神经系统CD4T细胞群的影响.
主要方法:
- 研究了10只SIVmac251感染的 rhesus macaques 在模拟次优粘附ART治疗方案下.
- 在急性 (ART前) 和慢性 (ART后) 感染阶段评估.
- 利用大脑CD45+细胞的单细胞RNA测序来分析T细胞反应和病毒存在.
主要成果:
- 针对艾滋病毒的CCR5+ CD4 T细胞在脑膜和相邻的中枢神经系统组织 (状,硬质母体,头骨骨髓) 中被发现.
- 在急性SIV感染期间,在中枢神经系统组织中检测到高水平的病毒RNA,有证据表明T细胞参与和抗病毒分子激活.
- 急性SIV感染导致中枢神经系统CD4T细胞的显著枯竭,这种缺陷在慢性阶段仍然存在,尽管ART的病毒抑制.
结论:
- 在SIV感染期间,CD4 T细胞在功能上参与中枢神经系统的病毒存在.
- 调查结果强调,尽管ART有效,但从中枢神经系统根除艾滋病毒仍然存在挑战.
- 结果表明,在神经艾滋病毒治疗中,有针对T细胞的干预措施的潜力.
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