Immortalized, homozygous stat1-deficient mammalian cell...

C - Chemistry – Metallurgy – 12 – N

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C12N 5/00 (2006.01) C12N 7/00 (2006.01)

Patent

CA 2309114

The present invention is directed to immortalized STAT1-deficient mammalian cell lines. STAT1 is a signal transducer and activator of transcription that becomes phosphorylated when cells are treated with type I or type II interferons and leads to induction of specific gene expression, resulting in establishment of the antiviral state and the other known biological responses to interferons, including the inhibition of cell proliferation. Cells which lack this gene product are useful for producing high titers of viral stocks, for producing recombinant viral vectors, for testing samples, especially clinical samples for the presence of virus and for screening candidate compounds or drugs for anti-viral activity.

La présente invention a trait à des lignées cellulaires mammifères déficientes en STAT1; STAT1 étant un transducteur de signaux et un activateur de transcription qui est phosphorylé lorsque des cellules sont traitées avec des interférons de type I ou de type II, et conduit à l'induction de l'expression de gènes spécifiques, entraînant ainsi l'état antiviral et les autres réactions biologiques à l'interféron connues, notamment l'inhibition de la prolifération cellulaire. Les cellules ne possédant pas ce produit génique sont utiles dans la production de titres élevés de réserves virales, dans la production de vecteurs viraux de recombinaison, dans l'essai des échantillons, particulièrement les échantillons cliniques pour détecter la présence de virus et pour trier les composés ou les médicaments candidats pour leur activité antivirale.

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