New Method for Stable Expression of SFTS Virus-like Particles in CHO-K1 Cells / 病毒学报
Chinese Journal of Virology
; (6): 245-250, 2015.
Article
in Zh
| WPRIM
| ID: wpr-280266
Responsible library:
WPRO
ABSTRACT
To explore a new method for stable expression of virus-like particles (VLPs) of the severe fever with thrombocytopenia syndrome (SFTS) virus, an expression plasmid for the membrane glycoprotein (GP) and nucleocapsid protein (NP) of the SFTS virus was constructed by fusion of the two proteins via a serine residue, and a yellow fluorescence protein (YFP) gene was introduced into the plasmid as a reporter. CHO-K1 cells were transfected with this plasmid, and stable cell lines constructed using the limited dilution method. Cellular colonies were hand-picked based on YFP with the help of fluorescence microscopy and expanded without selection pressure. Stability of cell lines was evaluated by monitoring of fluctuation of the intensity of YFP for 40 passages. VLP production was characterized using an indirect fluorescence assay, immunoblotting, and electronic microscopy. We showed that GP and NP fusion proteins could be assembled into VLPs in vivo, and that VLPs had similar morphologies to virus particles. Selected cell lines were stable for YFP expression no significant fluctuation was detected in 40 passages. These data demonstrated the effectiveness of this new method for expression of structural proteins of the SFTS virus and screening for stable cell lines. Our results could provide new concepts for the production of biopharmaceuticals.
Full text:
1
Index:
WPRIM
Main subject:
Plasmids
/
Viral Proteins
/
Virion
/
Virology
/
Gene Expression
/
Cricetulus
/
Phlebovirus
/
CHO Cells
/
Cloning, Molecular
/
Bunyaviridae Infections
Limits:
Animals
Language:
Zh
Journal:
Chinese Journal of Virology
Year:
2015
Type:
Article