Publication: Cell penetrable human scFv specific to middle domain of matrix protein-1 protects mice from lethal influenza
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2015-01-14
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19994915
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2-s2.0-84921473751
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item.page.oaire.edition
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Mahidol University
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Viruses. Vol.7, No.1 (2015), 154-179
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Fonthip Dong-Din-On, Thaweesak Songserm, Tippawan Pissawong, Potjanee Srimanote, Jeeraphong Thanongsaksrikul, Kanyarat Thueng-In, Pattra Moonjit, Preeda Lertwatcharasarakul, Watee Seesuay, Wanpen Chaicumpa (2015). Cell penetrable human scFv specific to middle domain of matrix protein-1 protects mice from lethal influenza. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/36128.
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Cell penetrable human scFv specific to middle domain of matrix protein-1 protects mice from lethal influenza
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Abstract
© 2015 by the authors; licensee MDPI, Basel, Switzerland. A new anti-influenza remedy that can tolerate the virus antigenic variation is needed. Influenza virus matrix protein-1 (M1) is highly conserved and pivotal for the virus replication cycle: virus uncoating, assembly and budding. An agent that blocks the M1 functions should be an effective anti-influenza agent. In this study, human scFv that bound to recombinant M1 middle domain (MD) and native M1 of A/H5N1 was produced. Phage mimotope search and computerized molecular docking revealed that the scFv bound to the MD conformational epitope formed by juxtaposed helices 7 and 9 of the M1. The scFv was linked molecularly to a cell penetrable peptide, penetratin (PEN). The PEN-scFv (transbody), when used to treat the cells pre-infected with the heterologous clade/subclade A/H5N1 reduced the viral mRNA intracellularly and in the cell culture fluids. The transbody mitigated symptom severity and lung histopathology of the H5N1 infected mice and caused reduction of virus antigen in the tissues as well as extricated the animals from the lethal challenge in a dose dependent manner. The transbody specific to the M1 MD, either alone or in combination with the cognate human scFvs specific to other influenza virus proteins, should be an effective, safe and mutation tolerable anti-influenza agent.