Detection of negative-strand rna viruses

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/70 (2006.01) C12N 5/10 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2348957

A diagnostic assay for detecting a negative-strand RNA virus in a sample and a genetically engineered cell for use in the assay are disclosed. The cell expresses a heterologous DNA-dependent RNA polymerase that synthesizes a minigenome or miniantigenome of the RNA virus from a cDNA template present in the cell. The cell also expresses the nucleocapsid proteins of the negative- strand virus that are necessary for replication of the minigenome or miniantigenome. Infection of the cell by the negative-strand virus results in expression of a reporter gene product encoded by the miniantigenome.

La présente invention concerne un essai diagnostique permettant de détecter un virus à ARN négatif dans un échantillon et une cellule génétiquement modifiée à utiliser dans cet essai. La cellules exprime une ARN-polymérase ADN dépendante hétérologue qui synthétise un minigénome ou un miniantigénome à partir du virus à ARN tiré d'un modèle d'ADNc présent dans la cellule. La cellule exprime également les protéines de la nucléocapside du virus à ARN négatif qui sont nécessaires à la réplication du minigénome et du miniantigénome. L'infection de la cellule par le virus à ARN négatif entraîne l'expression d'un produit génique rapporteur codé par le miniantigénome.

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