A temperature sensitive Mycobacterium paragordonae induces enhanced protective immune responses against mycobacterial infections in the mouse model.

A temperature sensitive Mycobacterium paragordonae induces enhanced protective immune responses against mycobacterial infections in the mouse model.
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DOI:
10.1038/s41598-017-15458-7
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发表时间:
2017-11-09
期刊:
影响因子:
4.6
通讯作者:
Kim BJ
Kim BJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kim BJ;Kim BR;Kook YH;Kim BJ

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最近,我们引入了一种温度敏感的分枝杆菌属,副戈氏分枝杆菌 (Mpg)。在这里,我们检查了它作为结核分枝杆菌和脓肿分枝杆菌活疫苗接种候选者的潜力。与 BCG 感染相比,Mpg 小鼠静脉内感染导致集落形成单位 (CFU) 较低,这表明其作为活疫苗的有用性。免疫反应分析表明,Mpg 引发的高度保护性免疫依赖于有效的树突成熟、细胞因子模式和抗体产生向 Th1 表型的转变,以及增强的细胞毒性 T 细胞反应。与 BCG 相比,Mpg 在接种疫苗的小鼠中针对 2 种不同分枝杆菌菌株(结核分枝杆菌 H37Ra 或脓肿分枝杆菌 Asan 50594)的攻击表现出更有效的保护性免疫反应。我们的数据表明,温度敏感的 Mpg 可能是一种潜在的强大候选疫苗株,可诱导针对结核分枝杆菌和脓肿分枝杆菌的增强保护性免疫反应。
Recently, we introduced a temperature sensitive Mycobacterium spp., Mycobacterium paragordonae (Mpg). Here, we checked its potential as a candidate for live vaccination against Mycobacterium tuberculosis and Mycobacterium abscessus. Intravenous infections of mice with Mpg led to lower colony forming units (CFUs) compared to infection with BCG, suggesting its usefulness as a live vaccine. The analyses of immune responses indicated that the highly protective immunity elicited by Mpg was dependent on effective dendritic maturation, shift of cytokine patterns and antibody production toward a Th1 phenotype, and enhanced cytotoxic T cell response. Compared to BCG, Mpg showed a more effective protective immune response in the vaccinated mice against challenges with 2 different mycobacterial strains, M. tuberculosis H37Ra or M. abscessus Asan 50594. Our data suggest that a temperature sensitive Mpg may be a potentially powerful candidate vaccine strain to induce enhanced protective immune responses against M. tuberculosis and M. abscessus.
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