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Interferon induction in peripheral blood mononuclear leukocytes of man and farm animals by poxvirus vector candidates and some poxvirus constructs
Prototypes of three poxvirus genera—orthopoxvirus (OPV), parapoxvirus (PPV), avipoxvirus (APV)—and Newcastle disease virus (NDV) as a control, as well as three recombinant OPV strains and one recombinant APV strain, were incubated in vitro with peripheral blood mononuclear leukocytes (PBML) of man,...
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Published in: | Veterinary immunology and immunopathology 1995-06, Vol.46 (3), p.237-250 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Prototypes of three poxvirus genera—orthopoxvirus (OPV), parapoxvirus (PPV), avipoxvirus (APV)—and Newcastle disease virus (NDV) as a control, as well as three recombinant OPV strains and one recombinant APV strain, were incubated in vitro with peripheral blood mononuclear leukocytes (PBML) of man, sheep and swine.
Antiviral activity was determined in PBML culture supernatants at different time intervals after virus cell interaction using a cytopathic effect inhibition bioassay. Additionally, supernatants derived from human PBML were screened for interferons (IFN) alpha and gamma as well as for tumor necrosis factor by enzyme-linked immunosorbent assay. IFN titers reached a maximum 24 h after PBML stimulation at a multiplicity of infection (MOI) greater than 1. IFN alpha/beta was found to be responsible for the antiviral effect. Using a MOI ⩾ 1 the highly attenuated strain MVA was the only representant of vaccinia virus (VV) that induced significant amounts of IFN also as a
lacZ recombinant. Replicable virus from five well-known VV strains as well as the Chinese VV strain Tien Tan (VV TT) as a recombinant vaccine failed to induce Ieukocyte IFN. Inactivated VV strain Elstree and the recombinant TT strain induced high titers of leukocyte IFN. Supernatants derived from human, porcine and ovine PBML stimulated with replicable PPV, native VV MVA and MVA
lacZ recombinant or native APV and APV
lacZ recombinant virus regularly contained IFN alpha.
In contrast to NDV, neither specific antisera nor monoclonal antibodies were able to block the INF induction by VV and PPV. |
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ISSN: | 0165-2427 1873-2534 |
DOI: | 10.1016/0165-2427(94)05357-X |