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High-throughput analysis of T cell-monocyte interaction in human tuberculosis.
Clinical & Experimental Immunology ( IF 3.4 ) Pub Date : 2020-04-29 , DOI: 10.1111/cei.13447
M Habtamu 1, 2 , G Abrahamsen 1 , A Aseffa 2 , E Andargie 2 , S Ayalew 2 , M Abebe 2 , A Spurkland 1
Affiliation  

The lack of efficient tools for identifying immunological correlates of tuberculosis (TB) protection or risk of disease progression impedes the development of improved control strategies. To more clearly understand the host response in TB, we recently established an imaging flow cytometer‐based in‐vitro assay, which assesses multiple aspects of T cell–monocyte interaction. Here, we extended our previous work and characterized communication between T cells and monocytes using clinical samples from individuals with different TB infection status and healthy controls from a TB endemic setting. To identify T cell–monocyte conjugates, peripheral blood mononuclear cells (PBMC) were stimulated with ds‐Red‐expressing Mycobacterium bovis bacille Calmette–Guérin or 6‐kDa early secreted antigenic target (ESAT 6) peptides for 6 h, and analyzed by imaging flow cytometer (IFC). We then enumerated T cell–monocyte conjugates using polarization of T cell receptor (TCR) and F‐actin as markers for synapse formation, and nuclear factor kappa B (NF‐κB) nuclear translocation in the T cells. We observed a reduced frequency of T cell–monocyte conjugates in cells from patients with active pulmonary tuberculosis (pTB) compared to latent TB‐infected (LTBI) and healthy controls. When we monitored NF‐κB nuclear translocation in T cells interacting with monocytes, the proportion of responding cells was significantly higher in active pTB compared with LTBI and controls. Overall, these data underscore the need to consider multiple immunological parameters against TB, where IFC could be a valuable tool.

中文翻译:

人类结核病中T细胞-单核细胞相互作用的高通量分析。

缺乏有效的工具来识别结核病(TB)保护的免疫学相关性或疾病进展的风险阻碍了改进控制策略的发展。为了更清楚地了解结核病的宿主反应,我们最近建立了基于成像流式细胞仪的体外测定法,该方法可评估T细胞与单核细胞相互作用的多个方面。在这里,我们扩展了以前的工作,并使用了来自具有不同结核感染状况的个体的临床样品以及来自结核病流行环境的健康对照来表征了T细胞和单核细胞之间的通讯。为了鉴定T细胞-单核细胞结合物,用表达ds-Red的牛分枝杆菌刺激外周血单个核细胞(PBMC)杆菌Calmette–Guérin或6kDa早期分泌的抗原靶标(ESAT 6)肽6 h,并通过成像流式细胞仪(IFC)进行分析。然后,我们使用T细胞受体(TCR)和F-肌动蛋白的极化作为突触形成的标志物,以及T细胞中的核因子κB(NF-κB)核易位,枚举了T细胞-单核细胞结合物。我们观察到,与潜伏性结核感染(LTBI)和健康对照相比,活动性肺结核(pTB)患者的细胞中T细胞-单核细胞结合物的频率降低。当我们监测与单核细胞相互作用的T细胞中的NF-κB核易位时,与LTBI和对照组相比,活动性pTB中响应细胞的比例明显更高。总体而言,这些数据强调了需要考虑针对结核病的多种免疫学参数,而国际金融公司可能是其中一种有价值的工具。
更新日期:2020-04-29
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