Vierboom Michel P M, Chenine Agnes L, Darrah Patricia A, Vervenne Richard A W, Boot Charelle, Hofman Sam O, Sombroek Claudia C, Dijkman Karin, Khayum Mohamed A, Stammes Marieke A, Haanstra Krista G, Hoffmann Chantal, Schmitt Doris, Silvestre Nathalie, White Alexander G, Borish H Jacob, Seder Robert A, Ouaked Nadia, Leung-Theung-Long Stephane, Inchauspé Geneviève, Anantha Ravi, Limbach Mary, Evans Thomas G, Casimiro Danilo, Lempicki Maria, Laddy Dominick J, Bonavia Aurelio, Verreck Frank A W
1Department of Parasitology, Biomedical Primate Research Centre, Rijswijk, The Netherlands.
2Aeras, Rockville, MD 20850 USA.
NPJ Vaccines. 2020 May 14;5(1):39. doi: 10.1038/s41541-020-0189-2. eCollection 2020.
Tuberculosis (TB) still is the principal cause of death from infectious disease and improved vaccination strategies are required to reduce the disease burden and break TB transmission. Here, we investigated different routes of administration of vectored subunit vaccines based on chimpanzee-derived adenovirus serotype-3 (ChAd3) for homologous prime-boosting and modified vaccinia virus Ankara (MVA) for heterologous boosting with both vaccine vectors expressing the same antigens from (Ag85B, ESAT6, Rv2626, Rv1733, RpfD). Prime-boost strategies were evaluated for immunogenicity and protective efficacy in highly susceptible rhesus macaques. A fully parenteral administration regimen was compared to exclusive respiratory mucosal administration, while parenteral ChAd3-5Ag prime-boosting and mucosal MVA-5Ag boosting were applied as a push-and-pull strategy from the periphery to the lung. Immune analyses corroborated compartmentalized responses induced by parenteral versus mucosal vaccination. Despite eliciting TB-specific immune responses, none of the investigational regimes conferred a protective effect by standard readouts of TB compared to non-vaccinated controls, while lack of protection by BCG underpinned the stringency of this non-human primate test modality. Yet, TB manifestation after full parenteral vaccination was significantly less compared to exclusive mucosal vaccination.
结核病(TB)仍然是传染病致死的主要原因,因此需要改进疫苗接种策略以减轻疾病负担并阻断结核病传播。在此,我们研究了基于黑猩猩来源的3型腺病毒(ChAd3)的载体亚单位疫苗的不同给药途径,用于同源初免-加强免疫,以及用安卡拉痘苗病毒(MVA)进行异源加强免疫,两种疫苗载体均表达来自(Ag85B、ESAT6、Rv2626、Rv1733、RpfD)的相同抗原。在高度易感的恒河猴中评估了初免-加强策略的免疫原性和保护效果。将全胃肠外给药方案与单纯呼吸道黏膜给药进行了比较,同时将胃肠外ChAd3-5Ag初免-加强免疫和黏膜MVA-5Ag加强免疫作为一种从外周到肺部的推拉策略应用。免疫分析证实了胃肠外接种与黏膜接种诱导的分区反应。尽管引发了结核病特异性免疫反应,但与未接种疫苗的对照组相比,在结核病的标准检测指标中,没有一种研究方案具有保护作用,而卡介苗缺乏保护作用突出了这种非人灵长类动物试验方式的严格性。然而,与单纯黏膜接种相比,全胃肠外接种后的结核病表现明显较少。