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Interferon Gamma Release Assay in response to PE35/PPE68 proteins: a promising diagnostic method for diagnosis of latent tuberculosis.
European Cytokine Network ( IF 2.2 ) Pub Date : 2017-06-09 , DOI: 10.1684/ecn.2017.0391
Shima Mahmoudi 1 , Babak Pourakbari 1 , Setareh Mamishi 2
Affiliation  

Tuberculosis control relies on the identification and preventive treatment of people who are latently infected with Mycobacterium tuberculosis (Mtb). PE/PPE proteins have been reported to elicit CD4 and/or CD8 responses either in the form of whole recombinant proteins or as individual peptides. Very few of the PE and PPE proteins have been previously tested for responses in patients with TB and healthy donors. This is the first study to evaluate the Interferon Gamma Release Assay (IGRA) after stimulation with PE35 and PPE68. The antigenspecific levels of IFN-γ following stimulation with QuantiFERON-TB gold in-tube (QFT-G-IT) antigens, and PE35 and PPE68 recombinant proteins were evaluated in 79 children and 102 adults, respectively. Using QFT-G-IT kit, latent tuberculosis infection (LTBI) was detected in 26 children (33%) and 41 adults (40%); IGRA following stimulation with PE35 and PPE68 recombinant proteins, was positive, respectively, in 36 (46%) and 32 (40.5%) children, respectively. In addition, 53 adults (52%) had positive results following stimulation with these two proteins. The sensitivity and specificity ofIGRAfollowing stimulation with recombinant PE35 in children were76%and 80%, and following stimulation with recombinant PPE68 in this group, it was 73% and 75%, respectively. Meanwhile, there is no gold standard test for LTBI. Our designed tests using PE35 and PPE68 PE/PPE proteins, two PE/PPE proteins not present in BCG vaccins, which elicit CD4 and/or CD8 responses, might be helpful for rapid diagnosis of TB and improve the detection of LTBI. However, further validation studies to determine the advantage of IGRAs using these proteins, alone or combined, are highly recommended.

中文翻译:

响应PE35 / PPE68蛋白的干扰素γ释放测定:一种诊断潜伏性结核的有前途的诊断方法。

结核病的控制依赖于对潜伏性结核分枝杆菌感染者的识别和预防性治疗(MTB)。据报道,PE / PPE蛋白以完整重组蛋白的形式或以单个肽的形式引起CD4和/或CD8应答。先前已经测试了极少的PE和PPE蛋白在结核病患者和健康供体中的反应。这是第一项评估用PE35和PPE68刺激后的干扰素γ释放测定(IGRA)的研究。分别在79名儿童和102名成人中评估了用QuantiFERON-TB管内金(QFT-G-IT)抗原以及PE35和PPE68重组蛋白刺激后IFN-γ的抗原特异性水平。使用QFT-G-IT试剂盒,在26名儿童(33%)和41名成人(40%)中检测到潜伏性结核感染(LTBI);用PE35和PPE68重组蛋白刺激后,IGRA分别在36(46%)和32(40.5%)名儿童中呈阳性。此外,有53位成年人(52%)在用这两种蛋白刺激后获得了阳性结果。重组PE35刺激儿童IGRA的敏感性和特异性分别为76%和80%,该组经重组PPE68刺激后分别为73%和75%。同时,没有针对LTBI的金标准测试。我们使用PE35和PPE68 PE / PPE蛋白(在BCG疫苗中不存在的两种PE / PPE蛋白)引发CD4和/或CD8反应的设计测试,可能有助于快速诊断结核病并改善LTBI的检测。但是,强烈建议进行进一步的验证研究,以确定单独或组合使用这些蛋白质的IGRA的优势。重组PE35刺激儿童IGRA的敏感性和特异性分别为76%和80%,该组经重组PPE68刺激后分别为73%和75%。同时,没有针对LTBI的金标准测试。我们使用PE35和PPE68 PE / PPE蛋白(在BCG疫苗中不存在的两种PE / PPE蛋白)引发CD4和/或CD8反应的设计测试,可能有助于快速诊断结核病并改善LTBI的检测。但是,强烈建议进行进一步的验证研究,以确定单独或组合使用这些蛋白质的IGRA的优势。重组PE35刺激儿童对IGRA的敏感性和特异性分别为76%和80%,该组经重组PPE68刺激后分别为73%和75%。同时,没有针对LTBI的金标准测试。我们使用PE35和PPE68 PE / PPE蛋白(在BCG疫苗中不存在的两种PE / PPE蛋白)引发CD4和/或CD8反应的设计测试,可能有助于快速诊断结核病并改善LTBI的检测。但是,强烈建议进行进一步的验证研究,以确定单独或组合使用这些蛋白质的IGRA的优势。我们使用PE35和PPE68 PE / PPE蛋白(在BCG疫苗中不存在的两种PE / PPE蛋白)引发CD4和/或CD8反应的设计测试,可能有助于快速诊断结核病并改善LTBI的检测。但是,强烈建议进行进一步的验证研究,以确定单独或组合使用这些蛋白质的IGRA的优势。我们使用PE35和PPE68 PE / PPE蛋白(在BCG疫苗中不存在的两种PE / PPE蛋白)引发CD4和/或CD8反应的设计测试,可能有助于快速诊断结核病并改善LTBI的检测。但是,强烈建议进行进一步的验证研究,以确定单独或组合使用这些蛋白质的IGRA的优势。
更新日期:2017-06-09
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