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    Human polyclonal immunoglobulin G from transchromosomic bovines inhibits MERS-CoV in vivo

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    Author
    Luke, T.
    Coleman, C.M.
    Frieman, M.B.
    Date
    2016
    Journal
    Science Translational Medicine
    Publisher
    American Association for the Advancement of Science
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://doi.org/10.1126/scitranslmed.aaf1061
    Abstract
    As of 13 November 2015, 1618 laboratory-confirmed human cases of Middle East respiratory syndrome coronavirus (MERS-CoV) infection, including 579 deaths, had been reported to the World Health Organization. No specific preventive or therapeutic agent of proven value against MERS-CoV is currently available. Public Health England and the International Severe Acute Respiratory and Emerging Infection Consortium identified passive immunotherapy with neutralizing antibodies as a treatment approach that warrants priority study. Two experimental MERS-CoV vaccines were used to vaccinate two groups of transchromosomic (Tc) bovines that were genetically modified to produce large quantities of fully human polyclonal immunoglobulin G (IgG) antibodies. Vaccination with a clade A ?-irradiated whole killed virion vaccine (Jordan strain) or a clade B spike protein nanoparticle vaccine (Al-Hasa strain) resulted in Tc bovine sera with high enzyme-linked immunosorbent assay (ELISA) and neutralizing antibody titers in vitro. Two purified Tc bovine human IgG immunoglobulins (Tc hIgG), SAB-300 (produced after Jordan strain vaccination) and SAB-301 (produced after Al-Hasa strain vaccination), also had high ELISA and neutralizing antibody titers without antibody- dependent enhancement in vitro. SAB-301 was selected for in vivo and preclinical studies. Administration of single doses of SAB-301 12 hours before or 24 and 48 hours after MERS-CoV infection (Erasmus Medical Center 2012 strain) of Ad5-hDPP4 receptor-transduced mice rapidly resulted in viral lung titers near or below the limit of detection. Tc bovines, combined with the ability to quickly produce Tc hIgG and develop in vitro assays and animal model(s), potentially offer a platform to rapidly produce a therapeutic to prevent and/or treat MERSCoV infection and/or other emerging infectious diseases.
    Sponsors
    Henry M. Jackson Foundation, HJF; National Institute of Allergy and Infectious Diseases, NIAID, U.S. Department of Health and Human Services, HHS: KC776174.1; National Institutes of Health, NIH: RO1 AI095569, RO1 AI091322, PO1 AI060699; Erasmus Medisch Centrum, Erasmus MC: 7074983, 7491867, 14/416870, 7928285, 13/510327, 847705.82000.25GB.E0018, 7803981, 14/056517; U.S. Department of Defense, DOD; Battelle: HHSN272200700016I; U.S. Navy: III DO-0005
    Keyword
    MERS-CoV
    transchromosomic bovines
    polyclonal immunoglobulin G antibodies
    Middle East Respiratory Syndrome Coronavirus
    Vaccines
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-84973153410&doi=10.1126%2fscitranslmed.aaf1061&partnerID=40&md5=412e20538e1071a2eb4e8542d9c7ee07; http://hdl.handle.net/10713/12402
    ae974a485f413a2113503eed53cd6c53
    10.1126/scitranslmed.aaf1061
    Scopus Count
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    UMB Coronavirus Publications

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