介素-1受体对抗剂是加剧结核病易感性的保守早期因素
Ophelia V Lee1, Daisy X Ji2, Bruce A Rosa3
1Divison of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA, 94720, USA.
bioRxiv : the preprint server for biology
|November 14, 2023
概括
结核病 (TB) 的发病过程很复杂. 在易受感染的小鼠中,巨细胞发展出Spp1+状态,表达IL-1受体对手 (IL-1Ra),阻碍细菌的控制. 增强IL-1信号传递改善了Mycobacterium结核病 (Mtb) 的控制.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 病变的发生和发病.
背景情况:
- 结核病 (TB) 的发病因子尚不清楚,标准小鼠模型无法完全复制人类疾病.
- 结核菌菌菌 (Mtb) 感染导致显著的死亡率,突出需要更好的模型和理解.
- 来自Mtb敏感小鼠模型的基因签名比耐药模型更好地预测人类结核病.
研究的目的:
- 为了研究跨物种的Mtb病变的保存机制.
- 探索Spp1+巨细胞和IL-1受体对手 (IL-1Ra) 在Mtb敏感性中的作用.
- 确定调节IL-1信号是否可以改善Mtb感染模型中的细菌控制.
主要方法:
- 对感染Mtb的小鼠,非人类灵长类动物和人类的基因表达特征进行比较分析.
- 鉴定和表征Mtb诱导的巨细胞分化状态 (Spp1+).
- 基因操纵 (IL-1Ra删除) 以增强易感小鼠模型中的IL-1信号,并评估细菌控制.
主要成果:
- 易受mtb感染的小鼠,非人类灵长类动物和人类共享Spp1+巨细胞分化状态,这种状态在耐药小鼠中不存在.
- Spp1+巨体表达免疫抑制性IL-1受体对手 (IL-1Ra).
- 通过删除IL-1Ra来增强IL-1信号传递,在三个敏感小鼠模型中显著改善了Mtb控制.
结论:
- 免疫抑制分子的髓状细胞表达,特别是IL-1Ra,是限制Mtb控制的保存机制.
- IL-1信号放大了细胞因子的产生,有助于细菌的控制.
- 了解这些保存机制可以为开发新型结核病疗法提供信息.
相关概念视频
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