初级结核菌粒瘤为超级感染提供了一个利基 Mycobacterium
Denise Wee1, Manitosh Pandey1, Yao Chen1
1A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore, Republic of Singapore.
Nature communications
|November 28, 2025
概括
结核病感染会产生颗粒瘤,这些颗粒瘤可以保护机会性病原体,如Mycobacterium abscessus. 这些颗粒瘤保护感染免受免疫反应和抗生素的影响,突出显示了非结核性菌根菌病的风险.
科学领域:
- 传染性疾病 传染性疾病
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 斑马鱼模型 斑马鱼模型
背景情况:
- 以前或同时感染Mycobacterium结核病是非结核菌 (NTM) 感染的关键风险因素,特别是在亚洲.
- 了解在结核病背景下驱动NTM易感性的机制对于公共卫生至关重要.
研究的目的:
- 在斑马鱼系统中模拟Mycobacterium tuberculosis (M. tuberculosis) 和机会性病原体之间的相互作用.
- 调查M.结核菌颗粒瘤如何影响二次感染的生长和存活,特别是Mycobacterium (M.).
主要方法:
- 在斑马鱼中建立初级Mycobacterium marinum (M. marinum) 颗粒瘤.
- 引入二次M. abscessus感染以评估殖民和现有颗粒瘤内的生长.
- 评估M. abscessus对宿主免疫细胞 (巨细胞) 的保护以及颗粒瘤内的抗生素治疗.
- 测试其他机会性病原体 (Mycobacterium smegmatis,Aspergillus fumigatus,Candida auris) 在M. marinum颗粒瘤中的殖民.
主要成果:
- 二次性M. abscessus偏好在初级的M. marinum颗粒体内殖民和生长.
- 颗粒瘤寄居的M. abscessus逃避了巨细胞介导的免疫控制,并受到抗生素治疗的保护.
- 其他机会性病原体,包括M. smegmatis,A. fumigatus和C. auris,也在M. marinum颗粒瘤中殖民和生长.
- 马氏的生长是由M. marinum ESX-1毒性系统在一个受保护的利基中产生的体为燃料.
结论:
- 结核颗粒瘤可以成为机会性病原体M. abscessus的持续.
- 这种相互作用表明一种机制,即M.结核病感染增加了对NTM感染的易感性.
- 这些发现强调了颗粒瘤有潜力庇护和保护各种机会性病原体.
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