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Journal of Virology, September 1999, p. 7582-7589, Vol. 73, No. 9
Department of Microbiology and Molecular
Genetics,
Received 5 April 1999/Accepted 11 June 1999
EBV episomes are nuclear plasmids that are stably maintained
through multiple cell divisions in primate and canine cells (J. L. Yates, N. Warren, and B. Sugden, Nature 313:812-815, 1985). In this
report, we describe the construction and characterization of an
E1-deleted recombinant adenovirus vector system that delivers an EBV
episome to infected cells. This adenovirus-EBV hybrid vector system
utilizes Cre-mediated, site-specific recombination to excise an EBV
episome from a target recombinant adenovirus genome. We demonstrate
that this vector system efficiently delivers the EBV episome and stably
transforms a large fraction of infected canine D-17 cells. Using a
colony-forming assay, we demonstrate stable transformation of 37% of
cells that survive the infection. However, maximal transformation
efficiency is achieved at doses of the E1-deleted recombinant
adenoviruses that are toxic to the infected cells. Consequently,
E1-deleted vector toxicity imposes a limitation on our current vector system.
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
An Adenovirus-Epstein-Barr Virus Hybrid Vector
That Stably Transforms Cultured Cells with High Efficiency
*
Corresponding author. Mailing address: Department of
Microbiology and Molecular Genetics, Molecular Biology Institute,
University of California, Los Angeles, 611 Charles E. Young Dr. East,
Box 951570, Los Angeles, CA 90095-1507. Phone: (310) 206-6298. Fax: (310) 206-7286. E-mail: berk{at}ewald.mbi.ucla.edu.
Journal of Virology, September 1999, p. 7582-7589, Vol. 73, No. 9
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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