互白素-6 限制了原始细胞的前胸部T细胞系承诺,导致SIV控制的丧失
bioRxiv : the preprint server for biology
|February 12, 2026
概括
在SIV感染后,致病性炎症在骨髓中迅速消耗甲状腺播种原始细胞 (TSPs),损害T细胞恢复和病毒控制. 阻断干白素-6 (IL-6) 信号恢复了T细胞的发育,提供了新的艾滋病毒治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 血液形成 血液形成 血液形成
背景情况:
- 有效的T细胞复制对于控制HIV和实现免疫治疗至关重要.
- T细胞恢复依赖于持续的胸膜输出,这需要从骨髓 (BM) 持续供应T细胞承诺的原始细胞.
- 猿类免疫缺陷病毒 (SIV) 感染的可以作为研究HIV病原和潜在治疗策略的模型.
研究的目的:
- 调查SIV感染对乳腺播种原始体 (TSPs) 的影响.
- 确定TSP动态,T细胞发育和早期病毒控制之间的关系.
- 阐明炎症,特别是IL-6在T细胞谱系中的作用.
主要方法:
- 利用SIV/ rhesus模型追踪T细胞致力于在BM感染后的原始细胞.
- 采用流细胞测量来识别和量化胸腺播种原始体 (TSPs; CD4−CD8−CD34+CD38−CD7+).
- 综合转录和蛋白质组分析,以了解炎症诱导的祖先功能障碍的分子机制.
- 用于 rhesus macaque 和人类造血干细胞和前代细胞 (HSPC) 的体外模型来评估IL-6和IL-6受体阻塞的影响.
主要成果:
- SIV感染导致BM TSPs的快速下降,与减少T细胞承诺的HSPC分化相关.
- 失去了TSP和受损的甲状腺前T细胞潜力与早期失去病毒控制有很强的相关性.
- 血IL-6水平升高预测了TSP损失,并限制了T细胞偏差的HSPC分化.
- 通过IL-6-JAK-STAT轴的炎症印记抑制了HSPC中的关键T细胞特异因子.
- 暴露于IL-6在体外抑制了TSP的发展,而IL-6受体阻断恢复了胸细胞分化.
结论:
- 由IL-6驱动的致病性炎症限制了SIV感染早期的前胸腺T细胞发育.
- 这种对T细胞发育的限制直接导致病毒控制的丧失.
- 准IL-6信号传递是一种潜在的治疗策略,可以恢复T细胞免疫力,并帮助治愈艾滋病毒.
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