人类膜巨对Mycobacterium tuberculosis的反应:免疫特征是个体之间很大的差异性的基础
Wolfgang Sadee1, Ian H Cheeseman2, Audrey Papp1
1The Ohio State University.
Research square
|June 19, 2023
概括
人类巨细胞与Mycobacterium tuberculosis (M.tb) 相互作用的个体间变化影响结核病 (TB) 风险. 这项研究确定了影响M.tb生长的关键宿主基因和网络,为TB易感性指标提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 基因组学就是基因组学.
背景情况:
- 结核菌菌 (M.tb) 感染人类气膜巨细胞 (AMs),导致结核病 (TB).
- M.tb-AM相互作用的个体间变异性影响结核病风险,治疗疗效和疫苗疗效.
- 了解肺部这些变异背后的遗传和蛋白质表达是至关重要的,但目前是有限的.
研究的目的:
- 系统地分析来自不同捐赠者的M.tb与人类AM的相互作用.
- 为了识别宿主基因和蛋白质表达程序,决定M.tb感染的个体间变异.
- 发现与M.tb生长和巨细胞反应相关的网络.
主要方法:
- 对28名健康捐赠者的病毒性M.tb菌株H37Rv与人类AM的相互作用进行了系统分析.
- 在72小时内测量宿主RNA和分泌蛋白质表达.
- 对差异性基因和蛋白质表达的系统分析,包括自身基因模块分析.
主要成果:
- 在M.tb吸收和生长方面存在显著的个体间差异 (高达十倍的变化).
- 识别不同表达的基因对M.tb感染的反应,与自身基因模块将M.tb生长与宿主形状联系起来.
- 发现了一个强大的基因网络,其中IL1B,STAT1和IDO1作为与M.tb生长相关的枢纽基因.
- 观察类似M1的巨细胞基因表达,其次是类似M2的形状.
结论:
- 观察到72小时后M.tb负载的个体间差异很大.
- 鉴定与早期M.tb生长动态相关的基因和网络.
- 开发个人对M.tb感染和治疗反应敏感性的生物指标的潜力.
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