國家衛生研究院 NHRI:Item 3990099045/12318

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Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/12318

Title:	Process development for pandemic influenza VLP vaccine production using a baculovirus expression system
Authors:	Lai, CC;Cheng, YC;Chen, PW;Lin, TH;Tzeng, TT;Lu, CC;Lee, MS;Hu, AYC
Contributors:	National Institute of Infectious Diseases and Vaccinology
Abstract:	Background Influenza viruses cause hundreds of thousands of respiratory diseases worldwide each year, and vaccination is considered the most effective approach for preventing influenza annual epidemics or pandemics. Since 1950, chicken embryonated eggs have been used as the main method for producing seasonal influenza vaccines. However, this platform has the main drawback of a lack of scale-up flexibility, and thus, egg-based vaccine manufacturers cannot supply sufficient doses within a short period for use for pandemic prevention. As a result, strategies for reducing the manufacturing time and increasing production capacity are urgently needed. Non-virion vaccine methods have been considered an alternative strategy against an influenza pandemic, and the purpose of maintaining an immunogenic capsule structure with infectious properties appears to be met by the virus-like particle (VLP) platform. Results An influenza H7N9-TW VLP production platform using insect cells, which included the expression of hemagglutinin (HA), NA, and M1 proteins, was established. To scale up H7N9-TW VLP production, several culture conditions were optimized to obtain a higher production yield. A high level of dissolved oxygen (DO) could be critical to H7N9-TW VLP production. If the DO was maintained at a high level, the HA titer obtained in the spinner flask system with ventilation was similar to that obtained in a shake flask. In this study, the HA titer in a 5-L bioreactor with a well-controlled DO level was substantially improved by 128-fold (from 4 HA units (HAU)/50 mu L to 512 HAU/50 mu L). Conclusions In this study, a multigene expression platform and an effective upstream process were developed. Notably, a high H7N9-TW VLP yield was achieved using a two-step production strategy while a high DO level was maintained. The upstream process, which resulted in high VLP titers, could be further used for large-scale influenza VLP vaccine production.
Date:	2019-10
Relation:	Journal of Biological Engineering. 2019 Oct;13:Article number 78.
Link to:	http://dx.doi.org/10.1186/s13036-019-0206-z
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1754-1611&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000492153200001
Cited Times(Scopus):	https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85074331848
Appears in Collections:	[Yung-Chih Hu] Periodical Articles [Min-Shi Lee] Periodical Articles [Tsai-Teng Tzeng] Periodical Articles

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