通过老化宿主导疗法消除衰老细胞可以减少小鼠结核病的进展
bioRxiv : the preprint server for biology
|July 9, 2025
概括
结核菌菌感染诱导肺髓状细胞衰老,促进疾病. 针对这些衰老细胞的老化药物改善了小鼠的生存率和减少了小鼠的细菌负载,这表明了潜在的结核病治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 病原体生物学 病原体生物学
- 细胞衰老 细胞衰老
背景情况:
- 结核菌菌 (Mtb) 感染会导致肺部亡,有助于其传播和生存.
- 感染Mtb的小鼠中的肺髓质细胞表现出细胞衰老的标志物,包括细胞循环停止和SASP.
- 衰老细胞是代谢活跃的,促进组织损伤,并抑制免疫反应.
研究的目的:
- 为了研究骨髓细胞衰老在Mtb感染中的作用.
- 评估老化药物对MTB诱导的肺病理的治疗潜力.
主要方法:
- 在感染Mtb小鼠的肺髓状细胞中分析衰老标记物 (p21,p16,γH2A.X,β-galactosidase,SASP).
- 全球转录组学以确定Mtb感染的巨细胞中受影响的途径.
- 用一种老化药物尾酒 (达沙替尼,奎尔塞丁,菲塞) 治疗感染Mtb的小鼠.
主要成果:
- Mtb感染在敏感和老年小鼠的肺髓状细胞中增加了衰老标志物.
- 衰老细胞表现出高调的亲生存和抗亡途径.
- 老化药物治疗延长了生存时间,降低了Mtb肺负担,降低了衰老标志物.
结论:
- Mtb感染可以诱导肺髓状细胞衰老,从而导致疾病的进展.
- 在临床前模型中,老化药物证明了对Mtb感染的治疗疗效.
- 准细胞衰老需要考虑未来对结核病的人类临床试验.
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