Adenoviruses for control of gene expression
First Claim
1. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, and site-specific recombinase target sites positioned to remove or invert a portion of the expression cassette, whereby recombination between said target sites mediated by a site-specific recombinase alters expression of the coding sequence of the gene.
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Abstract
The invention claims a class of adenovirus vectors for delivering recombinases to a large number of cells of different origins, and methods for regulating the expression of a gene in transfected mammalian cells in culture and in cells of transgenic animals, comprising infecting said cells with an Ad vector encoding a recombinase whose target site is present at or adjacent to the gene, wherein the action of the recombinase regulates the expression of said gene.
9 Citations
15 Claims
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1. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, and site-specific recombinase target sites positioned to remove or invert a portion of the expression cassette, whereby recombination between said target sites mediated by a site-specific recombinase alters expression of the coding sequence of the gene.
- 2. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, and site-specific recombinase target sites flanking the promoter sequence of said expression cassette that promotes expression of the gene, whereby recombination between said target sites mediated by a site-specific recombinase removes the promoter sequence, resulting in decreased expression of the coding sequence of the gene.
- 4. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, the promoter sequence directed away from said gene, and two site-specific recombinase target sites flanking said promoter sequence but oriented in opposite orientation to one another, whereby recombination between said target sites mediated by a site-specific recombinase inverts the promoter sequence, resulting in increased expression of the coding sequence of the gene.
- 6. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, a DNA spacer sequence located between the promoter sequence and the coding sequence, and a transcription termination site, and site-specific recombinase target sites flanking the DNA spacer sequence, whereby recombination between said target sites mediated by a site-specific recombinase removes the DNA spacer sequence, resulting in increased expression of the coding sequence of the gene.
- 8. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, and site-specific recombinase target sites flanking the coding sequence of the gene, whereby recombination between said target sites mediated by a site-specific recombinase removes the coding sequence, resulting in decreased of the coding sequence of the gene.
- 10. An adenovirus comprising an inserted expression cassette comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, a portion of said expression cassette comprising the coding sequence oriented in an opposite direction to normal translation of the coding sequence of the gene, and two site-specific recombinase target sites flanking said coding sequence but oriented in opposite orientation to one another, whereby recombination between said target sites mediated by a site-specific recombinase inverts the coding sequence, resulting in increased expression of the coding sequence of the gene.
- 12. An adenovirus comprising a promoter sequence, a coding sequence of a gene, a transcription termination site, and site-specific recombinase target sites flanking the coding sequence of the gene, whereby recombination between said target sites mediated by a site-specific recombinase removes the coding sequence of the gene, resulting in decreased expression of the gene.
- 14. An adenovirus comprising a promoter sequence, a coding sequence of a gene, and a transcription termination site, said coding sequence of the gene oriented in an opposite direction to normal translation of the gene, and two site-specific recombinase target sites flanking said coding sequence of the gene but oriented in opposite orientation to one another, whereby recombination between said target sites mediated by a site-specific recombinase inverts the gene, resulting in increased expression of the coding sequence of the gene.
Specification