title: [Expression of porcine interferon-gamma and its safe antiviral assay].
abstract: In order to ensure the biosafety of the IFN-gamma antiviral activity assay, we used a replication-deficient VSV carrying GFP as an interferon sensitive indicator virus (VSVdeltaG*G). The antiviral activities of porcine IFN-gamma expressed in Escherichia coli and in baculovirus on MDBK cells were assessed. The results showed that the antiviral activity of porcine IFN-gamma expressed in baculovirus could reach 10(5) IU/mL, while the porcine IFN-gamma expressed in E. coli showed some antiviral activity (32 IU/mL) after refolding. The results of the VSVdeltaG*G-based antiviral assay were almost identical to that of the VSV*GFP-based assay, suggesting it is highly feasible to use VSVdeltaG*G as a substitute for VSV*GFP, making assays for IFN-gamma antiviral activity safer and more accurate.
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, China.
authors.forename: Fan
authors.initials: F
authors.lastname: He
authors.forename: Yuan
authors.initials: Y
authors.lastname: Sun
authors.forename: Jinying
authors.initials: J
authors.lastname: Ge
authors.forename: Miao
authors.initials: M
authors.lastname: Li
authors.forename: Tianming
authors.initials: T
authors.lastname: Chang
authors.forename: Zhigao
authors.initials: Z
authors.lastname: Bu
authors.forename: Huaji
authors.initials: H
authors.lastname: Qiu
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000494:pharmacology*; D016367:Baculoviridae / Q000235:genetics / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D005822:Genetic Vectors / Q000235:genetics; D049452:Green Fluorescent Proteins / Q000096:biosynthesis / Q000235:genetics; D007371:Interferon-gamma / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism / Q000494:pharmacology*; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000235:genetics / Q000494:pharmacology; D013552:Swine; D018116:Vesiculovirus / Q000187:drug effects / Q000502:physiology
chemical_list: D000998:Antiviral Agents; D011994:Recombinant Proteins; D049452:Green Fluorescent Proteins; D007371:Interferon-gamma