The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1998
Filed:
Jun. 05, 1995
Robert W King, West Chester, PA (US);
Christopher S Barker, Huntington Valley, PA (US);
Christoph Seeger, Melrose Park, PA (US);
Avid Therapeutics, Inc., Philadelphia, PA (US);
Fox Chase Cancer Center, Philadelphia, PA (US);
Abstract
Novel cell lines and methods are provided for inducibly expressing the Hepatitis B virus (HBV) genome within cultured cells. Cells are stably transformed with an HBV genome under control of an operator/promoter target sequence which can activate expression of the HBV genome when bound by a cognate transactivator protein. The cell lines are also stably transformed with a gene that encodes and expresses a suitable transactivator protein. Cells may be maintained under non-inducing conditions whereby the transactivator protein is unable to interact with the operator/promoter target sequence, so the HBV genome is not expressed. Under appropriate inducing conditions, the transactivator protein is enabled to interact with the operator/promoter target sequence, thereby activating expression of the HBV genome. The inducible system provides an effective and rapid cell-based assay to screen compounds for anti-hepadnaviral activity.