Plant Virology Research Center, College of Agriculture, Shiraz University, Shiraz, Iran.
Department of Clinical Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
Biotechnol Lett. 2022 Jan;44(1):45-57. doi: 10.1007/s10529-021-03211-0. Epub 2021 Nov 27.
After its emergence in late 2019 SARS-CoV-2 was declared a pandemic by the World Health Organization on 11 March 2020 and has claimed more than 2.8 million lives. There has been a massive global effort to develop vaccines against SARS-CoV-2 and the rapid and low cost production of large quantities of vaccine is urgently needed to ensure adequate supply to both developed and developing countries. Virus-like particles (VLPs) are composed of viral antigens that self-assemble into structures that mimic the structure of native viruses but lack the viral genome. Thus they are not only a safer alternative to attenuated or inactivated vaccines but are also able to induce potent cellular and humoral immune responses and can be manufactured recombinantly in expression systems that do not require viral replication. VLPs have successfully been produced in bacteria, yeast, insect and mammalian cell cultures, each production platform with its own advantages and limitations. Plants offer a number of advantages in one production platform, including proper eukaryotic protein modification and assembly, increased safety, low cost, high scalability as well as rapid production speed, a critical factor needed to control outbreaks of potential pandemics. Plant-based VLP-based viral vaccines currently in clinical trials include, amongst others, Hepatitis B virus, Influenza virus and SARS-CoV-2 vaccines. Here we discuss the importance of plants as a next generation expression system for the fast, scalable and low cost production of VLP-based vaccines.
2019 年末,SARS-CoV-2 出现后,世界卫生组织于 2020 年 3 月 11 日宣布其为大流行,并已导致超过 280 万人死亡。全球已投入大量精力来开发针对 SARS-CoV-2 的疫苗,并且急需快速、低成本地生产大量疫苗,以确保向发达国家和发展中国家提供足够的疫苗供应。病毒样颗粒(VLPs)由病毒抗原组成,这些抗原自行组装成模拟天然病毒结构但缺乏病毒基因组的结构。因此,它们不仅是减毒或灭活疫苗的更安全替代品,而且还能够诱导有效的细胞和体液免疫反应,并且可以在不需要病毒复制的表达系统中通过重组方式生产。VLPs 已成功在细菌、酵母、昆虫和哺乳动物细胞培养物中生产,每种生产平台都有其自身的优势和局限性。植物在一个生产平台中具有许多优势,包括适当的真核蛋白修饰和组装、提高的安全性、低成本、高可扩展性以及快速的生产速度,这是控制潜在大流行爆发所需的关键因素。目前正在临床试验中的基于植物 VLP 的病毒疫苗包括乙型肝炎病毒、流感病毒和 SARS-CoV-2 疫苗等。在这里,我们讨论了植物作为下一代表达系统在快速、可扩展和低成本生产基于 VLP 的疫苗方面的重要性。