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Biological properties of purified recombinant HCV particles with an epitope-tagged envelope.

Abstract：

:To establish a simple system for purification of recombinant infectious hepatitis C virus (HCV) particles, we designed a chimeric J6/JFH-1 virus with a FLAG (FL)-epitope-tagged sequence at the N-terminal region of the E2 hypervariable region-1 (HVR1) gene (J6/JFH-1/1FL). We found that introduction of an adaptive mutation at the potential N-glycosylation site (E2N151K) leads to efficient production of the chimeric virus. This finding suggests the involvement of glycosylation at Asn within the envelope protein(s) in HCV morphogenesis. To further analyze the biological properties of the purified recombinant HCV particles, we developed a strategy for large-scale production and purification of recombinant J6/JFH-1/1FL/E2N151K. Infectious particles were purified from the culture medium of J6/JFH-1/1FL/E2N151K-infected Huh-7 cells using anti-FLAG affinity chromatography in combination with ultrafiltration. Electron microscopy of the purified particles using negative staining showed spherical particle structures with a diameter of 40-60 nm and spike-like projections. Purified HCV particle-immunization induced both an anti-E2 and an anti-FLAG antibody response in immunized mice. This strategy may contribute to future detailed analysis of HCV particle structure and to HCV vaccine development.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Takahashi H,Akazawa D,Kato T,Date T,Shirakura M,Nakamura N,Mochizuki H,Tanaka-Kaneko K,Sata T,Tanaka Y,Mizokami M,Suzuki T,Wakita T

doi

10.1016/j.bbrc.2010.04.081

subject

Has Abstract

pub_date

2010-05-14 00:00:00

pages

565-71

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(10)00750-3

journal_volume

395

pub_type

杂志文章

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