title: Correlation between the anti-virus-induced cytopathic effect activity of interferon-alpha subtypes and induction of MxA protein in vitro.
abstract: There are several interferon-alpha (IFN-alpha) subtypes. Mechanism of disparity in biological effects among members of IFN-alpha subtypes remains unexplained. Biological activity of IFN-alpha is mediated in part by induction of intracellular antiviral proteins. We studied whether differences in biologic effects of IFN-alpha subtypes may rely on their antiviral protein inducing effect. Intracellular induction of MxA protein and anti-virus-induced cytopathic effect (CPE) activity of 11 IFN-alpha subtypes in human amnion WISH cells have been studied. MxA protein quantitation in cell lysates was performed by immunochemiluminescence assay and anti-virus-induced CPE activity was assessed by protection against vesicular stomatitis virus (VSV)-induced CPE. Range of MxA values was high when cells were treated with 10 and 100 IU/ml of each IFN-alpha subtype. Levels of MxA correlated with anti-VSV-induced CPE obtained with 10 IU/ml IFN-alpha subtype. Together our data show a disparity in MxA-inducing activity of IFN-alpha subtypes and suggest that differences in anti-VSV-induced CPE of IFN-alpha subtypes in WISH cells can be related to their different ability to induce MxA.
authors.affiliation: Service de Virologie/UPRES EA 3610 Faculté de Médecine, Université Lille 2, Centre Hospitalier Régional et Universitaire de Lille France, France.
authors.forename: Cécile
authors.initials: C
authors.lastname: Schanen
authors.forename: Vincent
authors.initials: V
authors.lastname: Chieux
authors.forename: Pierre-Emmanuel
authors.initials: PE
authors.lastname: Lobert
authors.forename: Jeanne
authors.initials: J
authors.lastname: Harvey
authors.forename: Didier
authors.initials: D
authors.lastname: Hober
mesh_terms: D002460:Cell Line; D003588:Cytopathogenic Effect, Viral; D019204:GTP-Binding Proteins / Q000096:biosynthesis*; D006801:Humans; D016898:Interferon-alpha / Q000502:physiology*; D008163:Luminescent Measurements; D064547:Myxovirus Resistance Proteins; D013223:Statistics as Topic; D014721:Vesicular stomatitis Indiana virus / Q000472:pathogenicity*
chemical_list: D016898:Interferon-alpha; C579071:MX1 protein, human; D064547:Myxovirus Resistance Proteins; D019204:GTP-Binding Proteins