在Mycobacterium tuberculosis感染中,c-Myc抑制了巨细胞的抗菌细菌反应
bioRxiv : the preprint server for biology
|June 12, 2025
概括
干扰素- (IFN-γ) 定时影响巨细胞对Mycobacterium结核病 (MTB) 的防御. 抑制c-Myc增强了巨细胞的抗菌菌活性,这表明c-Myc是结核病的治疗标.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 分子生物学分子生物学
背景情况:
- 结核菌菌 (MTB) 导致全球显著的死亡率.
- 大多数暴露个体的自然免疫控制MTB.
- 干扰素- (IFN-γ) 对于对MTB的先天免疫防御至关重要.
研究的目的:
- 研究IFN-γ定时对巨细胞介导的MTB控制的影响.
- 探索c-Myc信号在MTB感染期间巨细胞功能中的作用.
- 评估c-Myc作为结核病的潜在治疗点.
主要方法:
- 在感染前或感染后暴露IFN-γ后评估巨细胞的抗菌活性.
- 使用无偏见的体外系统来识别信号通路.
- 开发和使用一种lentiviral Omomyc系统用于c-Myc抑制/过度表达.
- 分析代谢重编程,mTORC1活性和可诱导的氧化合成酶 (iNOS) 表达.
- 在小鼠模型中进行体内研究,并分析人类临床病理学.
主要成果:
- 感染前的IFN-γ暴露增强了巨细胞的抗菌活性;感染后的暴露没有.
- 在MTB控制中,c-Myc信号与巨细胞功能有很强的相关性.
- 通过Omomyc抑制c-Myc促进了具有增强抗菌活性的亲炎性巨细胞表型.
- 抑制c-Myc导致了代谢重编程,增加了mTORC1活性,调节了iNOS,并改善了细菌控制.
- 在体内和人体数据显示了c-Myc表达和MTB持久性/活跃结核病之间的相关性.
结论:
- c-Myc在MTB免疫逃避中发挥作用,并可能调解免疫特权.
- 准c-Myc以增强巨细胞功能是新型结核病治疗的有希望的策略.
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