An in vitro activity assay for human hepatitis b virus (hbv)...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/70 (2006.01) C12N 9/12 (2006.01) C12P 19/34 (2006.01) C12P 21/00 (2006.01) C12Q 1/48 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2344282

The present invention provides an in vitro activity assay for human hepatitis B virus (HBV) DNA polymerase, which comprises using, as the 5' oligonucleotide in PCR amplification of HBV DNA polymerase from a sample, an oligonucleotide into which has been incorporated the SP6 viral polymerase promoter, directly transcribing and translating the PCR products in the presence of a radio- labelled agent and measuring the priming of the HBV DNA polymerase. The present invention also provides the use of such an assay to assay activity of various serum samples, to screen for inhibitors of the HBV DNA polymerase and to test and/or screen potential anti-HBV drugs for their ability to inhibit DNA priming activity of human HBV DNA polymerase.

Cette invention se rapporte à un essai in vitro de dosage de l'activité de l'ADN-polymérase du virus de l'hépatite B (VHB) humain, qui consiste à utiliser, comme oligonucléotide 5' lors de l'amplification PCR (réaction en chaîne de la polymérase) de l'ADN-polymérase du VHB provenant d'un échantillon, un oligonucléotide dans lequel a été incorporé le promoteur de polymérase viral SP6, à procéder directement à la transcription et à la traduction des produits PCR en présence d'un agent radiomarqué, et à mesurer l'amorçage de l'ADN-polymérase du VHB. Cette invention présente également l'utilisation d'un tel essai pour doser l'activité de divers échantillons de sérum, pour cribler des inhibiteurs d'ADN-polymérase de VHB et pour tester et/ou cribler des médicaments anti-VHB potentiels par rapport à leur capacité d'inhiber l'activité d'amorçage d'ADN de l'ADN-polymérase du VHB humain.

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