Abstract：
:Expression of certain transgenes from an adenovirus vector can be deleterious to its own replication. This can result in the inhibition of virus rescue, reduced viral yields, or, in the worst case, make it impossible to construct a vector expressing the inhibiting transgene product. A gene regulation system based on the tet operon was used to allow the rescue and efficient growth of adenovectors that express transgenes to high levels. A key advantage to this system is that repression of transgene expression is mediated by the packaging cell line, thus, expression of regulatory products from the adenovector are not required. This provides a simple, broadly applicable system wherein transgene repression is constitutive during vector rescue and growth and there is no effect on adenovector-mediated expression of gene products in transduced cells. Several high-level expression vectors based on first- and second-generation adenovectors were rescued and produced to high titer that otherwise could not be grown. Yields of adenovectors expressing inhibitory transgene products were increased, and the overgrowth of cultures by adenovectors with nonfunctional expression cassettes was prevented. The gene regulation system is a significant advancement for the development of adenovirus vectors for vaccine and other gene transfer applications.
journal_name
Mol Biotechnoljournal_title
Molecular biotechnologyauthors
Gall JG,Lizonova A,EttyReddy D,McVey D,Zuber M,Kovesdi I,Aughtman B,King CR,Brough DEdoi
10.1007/BF02686012subject
Has Abstractpub_date
2007-03-01 00:00:00pages
263-73issue
3eissn
1073-6085issn
1559-0305pii
MB:35:3:263journal_volume
35pub_type
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