在结核病中,NAD (H) 稳态是由糖性髓状细胞介导的宿主保护的基础
Hayden T Pacl1, Krishna C Chinta1, Vineel P Reddy1
1Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA.
Nature communications
|September 6, 2023
概括
结核菌破坏骨髓细胞糖解通过耗尽NAD +,阻碍免疫力. NAD+前体尼古丁胺通过恢复这种代谢途径,显示出对结核病的治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢过程中的代谢.
- 微生物学 微生物学
背景情况:
- 结核菌菌菌 (Mtb) 感染通过未知的机制损害了骨髓细胞糖解.
- 糖溶性流对于髓状细胞的功能至关重要,它依赖于NAD+的可用性.
- 通过救援途径和乳酸代谢来维持NAD+平衡.
研究的目的:
- 为了阐明Mtb破坏骨髓细胞糖解的机制.
- 为了研究骨髓细胞糖解在结核病 (TB) 免疫中的作用.
- 探索针对结核病中NAD+代谢的治疗潜力.
主要方法:
- 对结核病患者的肺组织进行分析.
- 使用骨髓细胞特异性乳酸脱酶A淘汰赛 (LdhaLysM-/-) 的小鼠.
- 评估免疫细胞招募和IFNγ介导的保护.
- 测量NAD+水平和评估尼古丁胺的作用.
主要成果:
- 骨髓细胞糖解对于结核病的保护性免疫是必不可少的,包括免疫细胞的招募和IFNγ反应.
- Mtb 感染导致NAD+ 枯竭,抑制了糖溶性流动.
- 尼古丁胺是NAD+的前体,表现出宿主依赖的抗菌活性.
- 尼古丁胺胺的使用降低了小鼠的Mtb肺负担.
结论:
- Mtb通过破坏NAD (H) 恒温和重编程糖解来扰乱宿主新陈代谢.
- 准NAD+和糖解途径是结核病的一种有前途的治疗策略.
- 通过尼古丁胺胺恢复NAD+水平为结核病提供了潜在的宿主导治疗方法.
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