Enhanced system for construction of adenovirus vectors
US6855534B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2001 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Oct 18, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2800/30
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
In the present invention, viruses, plasmids or both are constructed which contain viral DNA, at least one head-to-head ITR junction, and recombinase recognition sites positioned such that site-specific recombination between recombinase recognition sites in separate plasmids results in generation of infectious viral DNA at high-efficiency in cotransfected host cells that have been engineered to express a site-specific recombinase. Because of the high-efficiency and specificity of the Cre enzyme, suitably engineered plasmids can be readily recombined to produce infectious virus at high-efficiency in cotransfected 293 cells, without, at the same time, producing wild-type adenovirus, with the attendant problems for removal thereof. Use of recombinases besides Cre and recombinase recognition sites besides lox sites, and use of cells other than 293 cells are also disclosed and enabled, as are kits incorporating the site-specific vector system, as well as compositions and methods for using such compositions as vaccines or in gene therapeutic applications. Enhancement in the efficiency of site-specific recombination is provided by inclusion of a head-to-head ITR junction in each virus, pla…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.