Publication: An optimized expression vector for improving the yield of dengue virus-like particles from transfected insect cells
Issued Date
2014-09-01
Resource Type
ISSN
18790984
01660934
01660934
Other identifier(s)
2-s2.0-84902001370
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Virological Methods. Vol.205, (2014), 116-123
Suggested Citation
Nicha Charoensri, Amporn Suphatrakul, Rungtawan Sriburi, Thippawan Yasanga, Jiraphan Junjhon, Poonsook Keelapang, Utaiwan Utaipat, Chunya Puttikhunt, Watchara Kasinrerk, Prida Malasit, Nopporn Sittisombut An optimized expression vector for improving the yield of dengue virus-like particles from transfected insect cells. Journal of Virological Methods. Vol.205, (2014), 116-123. doi:10.1016/j.jviromet.2014.04.019 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/33952
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Title
An optimized expression vector for improving the yield of dengue virus-like particles from transfected insect cells
Abstract
Recombinant virus-like particles (rVLPs) of flaviviruses are non-infectious particles released from cells expressing the envelope glycoproteins prM and E. Dengue virus rVLPs are recognized as a potential vaccine candidate, but large scale production of these particles is hindered by low yields and the occurrence of cytopathic effects. In an approach to improve the yield of rVLPs from transfected insect cells, several components of a dengue serotype 2 virus prM. +. E expression cassette were modified and the effect of these modifications was assessed during transient expression. Enhancement of extracellular rVLP levels by simultaneous substitutions of the prM signal peptide and the stem-anchor region of E with homologous cellular and viral counterparts, respectively, was further augmented by codon optimization. Extensive formation of multinucleated cells following transfection with the codon-optimized expression cassette was abrogated by introducing an E fusion loop mutation. This mutation also helped restore the extracellular E levels affected negatively by alteration of a charged residue at the pr-M junction, which was intended to promote maturation of rVLPs during export. Optimized expression cassettes generated in this multiple add-on modification approach should be useful in the generation of stably expressing clones and production of dengue virus rVLPs for immunogenicity studies. © 2014 Elsevier B.V.