HBV variants detection and application

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving virus or bacteriophage

Reexamination Certificate

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C435S235100, C435S236000, C435S006120, C424S189100

Reexamination Certificate

active

07875423

ABSTRACT:
The present invention relates generally to viral variants exhibiting reduced sensitivity to particular agents and/or reduced interactivity with immunological reagents. More particularly, the present invention is directed to hepatitis B virus (HBV) variants exhibiting complete or partial resistance to nucleoside or nucleotide analogs and/or reduced interactivity with antibodies to viral surface components including reduced sensitivity to these antibodies. The present invention further contemplates assays for detecting such viral variants, which assays are useful in monitoring anti-viral therapeutic regimens and in developing new or modified vaccines directed against viral agents and in particular HBV variants. The present invention also contemplates the use of the viral variants to screen for and/or develop or design agents capable of inhibiting infection, replication and/or release of the virus.

REFERENCES:
patent: WO 00/61758 (2000-10-01), None
patent: WO 01/94559 (2001-12-01), None
patent: WO 03/066841 (2003-08-01), None
patent: WO 03/066841 (2003-08-01), None
patent: WO 03/087351 (2003-10-01), None
patent: WO 2004/031224 (2004-04-01), None
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Angus P. et al., “Resistance to Adefovir Dipivoxil Therapy Associated With the Selection of a Novel Mutation in the HBV Polymerase”,Gastroenterology 125: 292-297 (2003) XP-002277740.
Torresi J. et al., “Restoration of Replication Phenotype of Lamivudine-Resistant Hepatitis B Virus Mutants by Compensatory Changes in the “Fingers” Subdomain of the Viral Polymerase Selected as a Consequence of Mutations in the Overlapping S Gene”, Virology, 299:88-99 (2002).
Ono S.K. et al., “The Polymerase L528M Mutation Cooperates with Nucleotide Binding-Site Mutations, Increasing Hepatitis B Virus Replication and Drug Resistance”, The Journal of Clinical Investigation, 107(4):449-455 (2001).

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