在Mycobacterium tuberculosis感染非人类灵长类动物的颗粒体内对巨细胞多样性的空间区别编程
Davide Pisu1, Persis S Sunny2,3,4, Molly L Nelson2
1Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
结核病 (TB) 颗粒瘤中的巨体表现出不同的亚型. 某些组织寄存和过渡性巨细胞对Mycobacterium tuberculosis (Mtb) 感染非常敏感,影响疾病的进展.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 传染性疾病 传染性疾病
背景情况:
- 结核病 (TB) 的发病包括颗粒瘤,其中巨细胞起着至关重要的作用.
- 结核病病变中的巨细胞的多样性和功能仍然不完全理解.
- 了解巨细胞异质性是开发有效结核病免疫疗法的关键.
研究的目的:
- 在早期结核病期间,在肺颗粒瘤内分析巨细胞子集.
- 为了研究不同类型的巨细胞的空间分布和感染易感性.
- 为了识别宿主巨细胞内由Mycobacterium tuberculosis (Mtb) 所利用的分子通路.
主要方法:
- 来自非人类灵长类动物结核病模型的肺组织和颗粒瘤的单细胞RNA测序.
- 免疫光染色以确定巨细胞的局部化和表型.
- 在受感染和未受感染的巨细胞之间进行基因表达的比较分析.
主要成果:
- 鉴定出不同的巨细胞子集,包括胚胎起源的组织居民膜巨细胞和单细胞衍生巨细胞,具有特定的颗粒瘤定位.
- 组织寄居的膜巨细胞和经历表皮细胞转移到介质酶细胞的子组显示出最高的Mtb负担.
- 受感染的巨细胞显示免疫和迁移基因的改变表达,这表明Mtb操纵生存.
结论:
- 巨细胞异质性显著影响对Mtb感染的易感性.
- 截然不同的巨细胞子组在结核病颗粒瘤形成和细菌制中发挥着不同的作用.
- 研究结果为结核病治疗的潜在免疫调节点提供了洞察力.
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