Yao Yushi, Lai Rocky, Afkhami Sam, Haddadi Siamak, Zganiacz Anna, Vahedi Fatemeh, Ashkar Ali A, Kaushic Charu, Jeyanathan Mangalakumari, Xing Zhou
McMaster Immunology Research Centre.
Department of Pathology & Molecular Medicine.
J Infect Dis. 2017 Jul 1;216(1):135-145. doi: 10.1093/infdis/jix252.
The translation of preclinically promising novel tuberculosis vaccines to ultimate human applications has been challenged by the lack of animal models with an immune system equivalent to the human immune system in its genetic diversity and level of susceptibility to tuberculosis.
We have developed a humanized mice (Hu-mice) tuberculosis model system to investigate the clinical relevance of a novel virus-vectored (VV) tuberculosis vaccine administered via respiratory mucosal or parenteral route.
We find that VV vaccine activates T cells in Hu-mice as it does in human vaccinees. The respiratory mucosal route for delivery of VV vaccine in Hu-mice, but not the parenteral route, significantly reduces the humanlike lung tuberculosis outcomes in a human T-cell-dependent manner.
Our results suggest that the Hu-mouse can be used to predict the protective efficacy of novel tuberculosis vaccines/strategies before they proceed to large, expensive human trials. This new vaccine testing system will facilitate the global pace of clinical tuberculosis vaccine development.
临床前有前景的新型结核病疫苗向最终人体应用的转化受到挑战,因为缺乏在遗传多样性和对结核病易感性水平方面与人类免疫系统相当的动物模型。
我们开发了一种人源化小鼠(Hu-小鼠)结核病模型系统,以研究通过呼吸道黏膜或肠胃外途径接种的新型病毒载体(VV)结核病疫苗的临床相关性。
我们发现,VV疫苗在Hu-小鼠中激活T细胞的方式与在人类疫苗接种者中相同。在Hu-小鼠中,通过呼吸道黏膜途径而非肠胃外途径接种VV疫苗,以人类T细胞依赖的方式显著降低了类似人类肺结核的结果。
我们的结果表明,在进行大规模、昂贵的人体试验之前,Hu-小鼠可用于预测新型结核病疫苗/策略的保护效果。这种新的疫苗测试系统将加快全球临床结核病疫苗的开发步伐。