alexa Characterization of Zaire ebolavirus glycoprotein-specific monoclonal antibodies.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular and Genetic Medicine

Author(s): Qiu X, Alimonti JB, Melito PL, Fernando L, Strher U,

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Abstract Zaire ebolavirus (ZEBOV) can be transmitted by human-to-human contact and causes acute haemorrhagic fever with case fatality rates up to 90\%. There are no effective therapeutic or prophylactic treatments available. The sole transmembrane glycoprotein (GP) is the key target for developing neutralizing antibodies. In this study, recombinant VSVΔG/ZEBOVGP was used to generate monoclonal antibodies (MAbs) against the ZEBOV GP. A total of 8 MAbs were produced using traditional hybridoma cell fusion technology, and then characterized by ELISA using ZEBOV VLPs, Western blotting, an immunofluorescence assay, and immunoprecipitation. All 8 MAbs worked in IFA and IP, suggesting that they are all conformational MAbs, however six of them recognized linearized epitopes by WB. ELISA results demonstrated that one MAb bound to a secreted GP (sGP 1-295aa); three bind to a part of the mucin domain (333-458aa); three MAbs recognized epitopes on the C-terminal domain of GP1 (296-501aa); and one bound to full length GP (VLPs/GP1,2 ΔTm). Using a mouse model these MAbs were evaluated for their therapeutic capacity during a lethal infection. All 8 MAb improved survival rates by 33\%-100\% against a high dose lethal challenge with mouse-adapted ZEBOV. This work has important implications for further development of vaccines and immunotherapies for ZEBOV infection. Crown Copyright © 2011. Published by Elsevier Inc. All rights reserved. This article was published in Clin Immunol and referenced in Journal of Molecular and Genetic Medicine

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