Broad-Spectrum HPV Vaccine Based on Recombinant Measles

基于重组麻疹的广谱 HPV 疫苗

• 批准号: 452172111
• 负责人: Privatdozent Dr. Michael D. Mühlebach
• 金额: --
• 依托单位: Abteilung Veterinärmedizin
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/452172111?language=en
• 关键词: Broad; Spectrum; HPV; Vaccine; Based

Human Papillomaviruses (HPV) induce generally benign papillomas of skin and mucosa. Persistent infection with ‘high-risk’ types causes carcinomas of the ano-genital tract (in particular cervical cancer) and the oro-pharynx, and has been implicated in development of non-melanoma skin cancer (NMSC). Licensed vaccines are based on virus-like particles (VLP) self-assembled from the major capsid protein L1. Vaccinations protect against mucosal HPV infection and thereby induced neoplasia limited to the respective vaccine genotypes requiring continued cervical screening in vaccinated women, and do not target skin types.RG1-VLP is a vaccine candidate composed of fusion protein of HPV16 L1 displaying the cross-neutralization epitope ‚RG1’ of the HPV16 L2 minor capsid protein on the assembled VLP surface. Vaccinations provide low-titer cross-type immunity and protection to a broad spectrum of high-risk and low-risk mucosal and cutaneous HPV types in vitro and in animal challenge models. However, duration and breadth of protection in vivo are unknown.Live attenuated replicating measles vaccine induces long lasting humoral and cellular immune responses. Recombinant measles virus (MV) has been developed as vaccine platform against foreign pathogens (West Nile, Dengue, etc).We propose to generate an economic next generation HPV vaccine to protect against all genital oncogenic and low-risk HPV, which may overcome the burden of continued cervical PAP screening despite licensed vaccines and yield further significant reduction of cervical cancers and other neoplasias induced by HPV. Implementation in routine measles vaccination campaigns could particularly benefit low- and middle-income countries, which carry the major burden of cervical cancers, and immunosuppressed patients, who are particularly prone to HPV infections and induced neoplasias including NMSC.In addition, we will determine crucial features for induction of memory B-cells, long-lived plasma cells, and plateau antibody titers, which are the main effectors for sterilizing immunity in the genital tract. We will also examine whether the MV vaccine platform and closely spaced HPV antigen-display act synergistically together for provoking robust and long-lasting cross-protective humoral immunity against HPV, and evaluate mechanisms for induction of cell-mediated immunity and its contribution to protection in novel animal disease models. Reinhard Kirnbauer is a co-inventor of licensed HPV vaccines and has developed HPV16 RG1-VLP, which is in clinical development as next generation broad-spectrum HPV vaccine candidate. Michael Mühlebach has used the MV vaccine platform for development of modern vaccines, in particular for a vaccine targeting MERS-CoV infections or CLDN6-positive tumors by inducing both effective humoral and cellular immune responses. Their laboratories have synergistic and complementing expertise, that provide critical additional value required for a cross-border DACH project.

人乳头瘤病毒(HPV)可引起皮肤和粘膜的良性乳头状瘤。持续感染高危类型会导致无生殖道癌(特别是宫颈癌)和口咽癌，并与非黑色素瘤皮肤癌(NMSC)的发展有关。获得许可的疫苗是基于从主要衣壳蛋白L1自我组装的病毒样颗粒(VLP)。RG1-VLP是一种候选疫苗，由HPV16L1融合蛋白组成，在组装的VLP表面显示HPV16L2小衣壳蛋白的交叉中和表位RG1‘。疫苗在体外和动物挑战模型中为广泛的高危和低危粘膜和皮肤HPV类型提供低滴度的交叉型免疫和保护。然而，体内保护的持续时间和广度尚不清楚。复制的减毒活疫苗可诱导持久的体液和细胞免疫反应。重组麻疹病毒(MV)已被开发为对抗外来病原体(西尼罗河、登革热等)的疫苗平台。我们建议生产一种经济的下一代HPV疫苗，以预防所有生殖器致癌和低风险HPV，这可能克服尽管获得许可的疫苗仍继续进行宫颈PAP筛查的负担，并进一步显著减少由HPV引起的宫颈癌和其他肿瘤。在常规麻疹疫苗接种活动中的实施特别有利于低收入和中等收入国家，这些国家承担着宫颈癌的主要负担，以及免疫抑制患者，他们特别容易受到HPV感染和诱发肿瘤，包括NMSC。此外，我们将确定诱导记忆B细胞、长寿浆细胞和平台抗体效价的关键特征，这些是生殖道灭菌免疫的主要影响因素。我们还将研究MV疫苗平台和密集的HPV抗原展示是否协同作用，以激发针对HPV的强大和持久的交叉保护性体液免疫，并评估在新的动物疾病模型中诱导细胞免疫的机制及其对保护的贡献。Reinhard Kirnbauer是特许HPV疫苗的共同发明人，并开发了HPV16RG1-VLP，作为下一代广谱HPV候选疫苗正在临床开发中。Michael Mühlebach利用MV疫苗平台开发了现代疫苗，特别是针对MERS冠状病毒感染或CLDN6阳性肿瘤的疫苗，通过诱导有效的体液和细胞免疫反应。他们的实验室拥有协同和互补的专业知识，这为跨境DACH项目提供了关键的附加值。