Biomedical Primate Research Centre (BPRC), Rijswijk, the Netherlands.
Department of Microbiology, Faculty of Medicine, IIS Aragon, University of Zaragoza, Zaragoza, Spain.
Cell Rep Med. 2021 Jan 19;2(1):100187. doi: 10.1016/j.xcrm.2020.100187.
To fight tuberculosis, better vaccination strategies are needed. Live attenuated -derived vaccine, MTBVAC, is a promising candidate in the pipeline, proven to be safe and immunogenic in humans so far. Independent studies have shown that pulmonary mucosal delivery of Bacillus Calmette-Guérin (BCG), the only tuberculosis (TB) vaccine available today, confers superior protection over standard intradermal immunization. Here we demonstrate that mucosal MTBVAC is well tolerated, eliciting polyfunctional T helper type 17 cells, interleukin-10, and immunoglobulins in the airway and yielding a broader antigenic profile than BCG in rhesus macaques. Beyond our previous work, we show that local immunoglobulins, induced by MTBVAC and BCG, bind to and enhance pathogen uptake. Furthermore, after pulmonary vaccination, but not infection, local T cells expressed high levels of mucosal homing and tissue residency markers. Our data show that pulmonary MTBVAC administration has the potential to enhance its efficacy and justifies further exploration of mucosal vaccination strategies in preclinical efficacy studies.
为了抗击结核病,我们需要更好的疫苗接种策略。减毒活疫苗 MTBVAC 是一种很有前途的候选疫苗,迄今为止已被证明在人体中是安全且具有免疫原性的。独立研究表明,与目前唯一可用的结核病 (TB) 疫苗卡介苗(BCG)相比,经肺部黏膜传递可提供更优越的保护作用。在这里,我们证明了黏膜 MTBVAC 具有良好的耐受性,可引发多功能 T 辅助细胞 17 型细胞、白细胞介素-10 和免疫球蛋白在气道中产生,与 BCG 相比,抗原谱更广。与我们之前的工作相比,我们还表明,由 MTBVAC 和 BCG 诱导的局部免疫球蛋白可结合并增强病原体的摄取。此外,在肺部接种疫苗后,但不是在感染后,局部 T 细胞表达高水平的黏膜归巢和组织驻留标志物。我们的数据表明,肺部 MTBVAC 给药有可能提高其疗效,并证明了在临床前疗效研究中进一步探索黏膜疫苗接种策略的合理性。