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Title: Chimeric hepatitis E virus-like particle as a carrier for oral-delivery
Authors: Pitchanee Jariyapong
Li Xing
Nienke E. van Houten
Tian Cheng Li
Wattana Weerachatyanukul
Benjamin Hsieh
Carlos G. Moscoso
Chun Chieh Chen
Masahiro Niikura
Holland H.R. Cheng
University of California, Davis
Mahidol University
Simon Fraser University
National Institute of Infectious Diseases
Keywords: Biochemistry, Genetics and Molecular Biology;Immunology and Microbiology;Medicine;Veterinary
Issue Date: 2-Jan-2013
Citation: Vaccine. Vol.31, No.2 (2013), 417-424
Abstract: Oral delivery with virus-like particles (VLPs) is advantageous because of the inherited entry pathway from their parental viral capsids, which enables VLP to withstand the harsh and enzymatic environment associated with human digestive tract. However, the repeat use of this system is challenged by the self-immunity. In order to overcome this problem, we engineered the recombinant capsid protein of hepatitis E virus by inserting p18 peptide, derived from the V3 loop of HIV-1 gp120, into the antibody-binding site. The chimeric VLP resembled the tertiary and quaternary structures of the wild type VLP and specifically reacted with an HIV-1 antibody against V3 loop. Different from the wild type VLP, the chimeric VLP was vulnerable to trypsin cleavage although it appeared as intact particle, suggesting that the intermolecular forces of attraction between the recombinant capsid proteins are strong enough to maintain the VLP icosahedral arrangement. Importantly, this VLP containing the V3 loop did not react with anti-HEV antibodies, in correspondence to the mutation at its antibody-binding site. Therefore, the insertion of peptides at the surface antigenic site could allow VLPs to escape pre-existing anti-HEV humoral immunity. © 2012 Elsevier Ltd.
ISSN: 18732518
Appears in Collections:Scopus 2011-2015

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