通过激活TFEB介导的自流,TRIM27引起了对结核的保护性免疫力
Dongdong Zhao1,2, Lihua Qiang1, Zehui Lei1,2
1CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.
Autophagy
|February 23, 2024
概括
这项研究确定了含有27 (TRIM27) 的三方基因为对抗Mycobacterium tuberculosis (Mtb) 的宿主防御因子. 通过激活转录因子EB (TFEB),TRIM27通过激活转录因子EB (TFEB) 来增强自流,为结核病 (TB) 的宿主导疗法提供了潜在的标.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 传染性疾病 传染性疾病
背景情况:
- 由Mycobacterium tuberculosis (Mtb) 引起的结核病 (TB) 是一个全球性的健康挑战,因药物耐药性而恶化.
- 宿主导疗法 (HDT) 通过调节宿主免疫力来治疗感染,但需要更好地了解宿主防御机制.
- 对调节免疫应对感染的宿主因素的有限知识阻碍了HDT的发展.
研究的目的:
- 为了确定参与对MTB感染的免疫防御的宿主因素.
- 阐明TRIM27增强宿主对Mtb.防御的机制.
- 探索TRIM27-TFEB途径作为结核病宿主导疗法的点的潜力.
主要方法:
- 鉴定TRIM27作为对MTB的宿主保护因子.
- 研究TRIM27在调节自流动中的作用.
- 在Mtb感染细胞和小鼠模型中分析涉及转录因子EB (TFEB) 和CREB1的TRIM27机制.
- 评估TFEB激活剂在挽救TRIM27缺陷效应中的有效性.
主要成果:
- TRIM27增强宿主宏自/自流,独立于其E3酶活性.
- TRIM27通过增强CREB1与TFEB促进体结合的作用,作为TFEB的核转录激活剂.
- 这种激活会诱导与自相关的基因表达和自流动,从而导致病原体清除.
- TFEB激活剂1抵消了TRIM27缺乏,恢复了自并减少了Mtb生存率在体外和体内.
结论:
- TRIM27被确定为对抗Mtb感染的关键宿主防御因素.
- TRIM27-CREB1-TFEB信号轴促进了自流,有助于宿主防御.
- 这一途径代表了开发结核病新型宿主导疗法的潜在治疗目标.
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