dc.contributor.author | Venter, Eduard | |
dc.contributor.author | Van der Merwe, Christiaan F. | |
dc.contributor.author | Buys, A.V. (Antonia Vergina) | |
dc.contributor.author | Huismans, H. (Henk), 1942- | |
dc.contributor.author | Van Staden, Vida | |
dc.date.accessioned | 2014-04-01T08:21:56Z | |
dc.date.available | 2014-04-01T08:21:56Z | |
dc.date.issued | 2014-03 | |
dc.description.abstract | African horse sickness virus (AHSV) is an arbovirus capable of successfully replicating in both its mammalian host and insect vector. Where mammalian cells show a severe cytopathic effect (CPE) following AHSV infection, insect cells display no CPE. These differences in cell death could be linked to the method of viral release, i.e. lytic or non-lytic, that predominates in a specific cell type. Active release of AHSV, or any related orbivirus, has, however, not yet been documented from insect cells. We applied an integrated microscopy approach to compare the nanomechanical and morphological response of mammalian and insect cells to AHSV infection. Atomic force microscopy revealed plasma membrane destabilization, integrity loss and structural deformation of the entire surface of infected mammalian cells. Infected insect cells, in contrast, showed no morphological differences from mock-infected cells other than an increased incidence of circular cavities present on the cell surface. Transmission electron microscopy imaging identified a novel large vesicle-like compartment within infected insect cells, not present in mammalian cells, containing viral proteins and virus particles. Extracellular clusters of aggregated virus particles were visualized adjacent to infected insect cells with intact plasma membranes. We propose that foreign material is accumulated within these vesicles and that their subsequent fusion with the cell membrane releases entrapped viruses, thereby facilitating a non-lytic virus release mechanism different from the budding previously observed in mammalian cells. This insect cell-specific defence mechanism contributes to the lack of cell damage observed in AHSV-infected insect cells. | en_US |
dc.description.librarian | hb2014 | en_US |
dc.description.sponsorship | National Research Foundation, Poliomyelitis Research Foundation and the Microscopy Society of Southern Africa Trust. | en_US |
dc.description.uri | http://vir.sgmjournals.org/ | en_US |
dc.identifier.citation | Venter, E, Van der Merwe, CF, Buys, AV, Huismans, H & Van Staden, V 2014, 'Comparative ultrastructural characterization of African horse sickness virus-infected mammalian and insect cells reveals a novel potential virus release mechanism from insect cells', Journal of General Virology, vol. 95, no. 3, pp. 642-651. | en_US |
dc.identifier.issn | 0022-1317 (print) | |
dc.identifier.issn | 1465-2099 (online) | |
dc.identifier.other | 10.1099/vir.0.060400-0 | |
dc.identifier.uri | http://hdl.handle.net/2263/37262 | |
dc.language.iso | en | en_US |
dc.publisher | Society for General Microbiology | en_US |
dc.rights | © 2014 Society for General Microbiology. This is an author manuscript that has been accepted for publication in Microbiology, copyright Society for General Microbiology, but has not been copy-edited, formatted or proofed. Cite this article as appearing in Journal of General Virology, vol. 95, no. 3, pp. 642-651, 2014. doi : 10.1099/vir.0.060400-0 | en_US |
dc.subject | Comparative ultrastructural characterization | en_US |
dc.subject | Virus-infected | en_US |
dc.subject | Insect cells | en_US |
dc.subject | Reveals | en_US |
dc.subject | Potential virus | en_US |
dc.subject | African horse sickness virus (AHSV) | en_US |
dc.title | Comparative ultrastructural characterization of African horse sickness virus-infected mammalian and insect cells reveals a novel potential virus release mechanism from insect cells | en_US |
dc.type | Postprint Article | en_US |