Open AccessIsolation of large T antigen-producing mouse cell lines capable of supporting replication of polyomavirus-plasmid recombinants.
Author(s) -
William J. Muller,
Monica A. Naujokas,
John A. Hassell
Publication year - 1984
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.4.11.2406
Subject(s) - biology , plasmid , virology , cell culture , origin of replication , transcription (linguistics) , gene , antigen , viral replication , virus , microbiology and biotechnology , genetics , linguistics , philosophy
Construction of polyomavirus vectors, analysis of mutant viruses, and rescue of integrated polyomavirus genomes would be considerably aided by the availability of transformed, permissive mouse cell lines capable of producing the viral tumor antigens. To isolate such cell lines, we constructed a hybrid transcription unit composed of the simian virus 40 early promoter fused to the coding region for the polyomavirus tumor antigens. This hybrid transcription unit was used to transform NIH 3T3 cells. Independent foci of transformed cells were isolated, recloned, and characterized. Among 10 lines initially analyzed, 7 supported the replication of origin-bearing plasmid DNAs. Three cell lines were characterized in greater detail. Each line contained one or two independent insertions of polyomavirus DNA and synthesized all three viral tumor antigens. Moreover, the large tumor antigen in two of three lines bound with specificity to sequences about the polyomavirus origin and early promoter. These cell lines should prove useful for studying not only the replication of polyomavirus but also the expression of foreign genes in a mouse cell environment.