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Baculovirus vector as an avian influenza vaccine: Hemagglutinin expression and presentation augment the vaccine immunogenicity

Paper ID Volume ID Publish Year Pages File Format Full-Text
23573 43452 2013 8 PDF Available
Title
Baculovirus vector as an avian influenza vaccine: Hemagglutinin expression and presentation augment the vaccine immunogenicity
Abstract

Baculovirus simultaneously displaying and expressing the avian influenza virus (AIV) hemagglutinin (HA) protein can induce potent anti-HA humoral and cellular immune responses. Based on the hypothesis that improving the antigen expression and presentation can further boost the AIV vaccine efficacies, we first constructed a baculoviral vector (Bac-HAW) with HA gene fused with the woodchuck hepatitis virus post-transcriptional regulatory element (WPRE) near its 3′ end and expressed under the control of the hybrid CAG promoter. The WPRE fusion improved the HA expression and augmented the humoral and Th1 cellular immune responses after intramuscular administration into BALB/c mice. With Bac-HAW as the backbone, we next constructed Bac-HAMW which harbored the HA gene flanked with the signal sequence (MHCIss) and trafficking domain (MITD) of MHC class I molecule. In comparison with Bac-HAW, Bac-HAMW ameliorated the HA peptide presentation, significantly elevated the HA-specific humoral response (total IgG, IgG2a and hemagglutination inhibition titers) and favorably boosted the Th1 and IFN-γ+/CD8+ T cell responses without extraneous adjuvants. These data collectively confirmed that enhancement of antigen expression and presentation by combining the WPRE and MHCIss/MITD fusion can potentiate the immunogenicity of the baculovirus-based vaccine, and implicates the potential of Bac-HAMW as an appealing AIV vaccine.

► WPRE and MHCIss/MITD fusion potentiated the immunogenicity of baculovirus vaccine. ► WPRE fusion improved the HA expression and substantiated the immune responses. ► MHCIss/MITD tagging ameliorated the HA peptide presentation. ► MHCIss/MITD tagging elevated the HA-specific humoral and cellular immune responses. ► WPRE and MHCIss/MITD fusion enhanced the antigen expression and presentation.

Keywords
HA, hemagglutinin; MHCIss, MHC class I signal peptide; MITD, MHC class I trafficking domain; WPRE, woodchuck hepatitis virus post-transcriptional regulatory elementBaculovirus; Avian influenza; Vaccine; Antigen presentation; MHC class I; Vector vaccine
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Baculovirus vector as an avian influenza vaccine: Hemagglutinin expression and presentation augment the vaccine immunogenicity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 164, Issue 1, 10 March 2013, Pages 143–150
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us