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Updated: Jan 10, 2026

Sample Preparation of Mycobacterium tuberculosis Extracts for Nuclear Magnetic Resonance Metabolomic Studies

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系统分析揭示了Mycobacterium结核病在不同物种中采用的替代代代谢状态

Jonathan Padilla-Gomez^1,2, Rachel McGinn^1,2, Yisha Liang²

¹Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

bioRxiv : the preprint server for biology

|November 26, 2025

概括

结核菌菌 (Mtb) 在人类和小鼠巨细胞中表现出不同的代谢状态. 人类巨细胞限制了Mtb脂质包容形成,与小鼠巨细胞不同,揭示了宿主特定的感染障碍.

科学领域:

微生物学微生物学
免疫学免疫学免疫学
宿主-病原体相互作用

背景情况:

结核菌菌 (Mtb) 在宿主巨细胞内存活,但不同宿主物种如何影响其细胞内状态尚不清楚.
了解宿主特定的Mtb适应对于开发有效的结核病治疗非常重要.

研究的目的:

为了直接比较人类和小鼠巨细胞中mtb的细胞内转录组.
调查 Mtb. 中的特定物种代谢状态和脂质代谢差异.

主要方法:

人类和小鼠巨细胞中细胞内Mtb转录组的直接比较.
光脂肪酸追踪可用于可视化Mtb脂质含量 (ILI).
对宿主三糖醇 (TAG) 合成及其对Mtb ILI形成的影响的分析.

主要成果:

独特的宿主强加的微环境驱使Mtb进入可分离的代谢状态.
鼠标巨细胞诱导铁和氧化应激反应,而人类巨细胞促进脂肪酸进口.
Mtb在小鼠巨细胞中形成细胞内脂质包容 (ILI),但不是人类巨细胞,依赖ESX-1分泌系统,与宿主TAG合成相反相关.

结论:

宿主物种显著地影响了Mtb的细胞内代谢状态和脂质获取.
主体三糖醇合成作为一种代谢门,限制了Mtb在人类巨细胞中进入主体脂质的机会.
这些发现为了解Mtb代谢适应提供了跨物种的框架,并确定了人类巨细胞中的关键障碍.

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