title: Establishment of composite DNA derived from L factor as a plasmid in mouse embryonal carcinoma (F9) cells.
abstract: We have recently reported a mammalian cell plasmid (L factor) whose structure is related to that of polyomavirus (T. Kusano, H. Uehara, H. Saito, K. Segawa, and M. Oishi, Proc. Natl. Acad. Sci. USA 84:1789-1793, 1987). When composite DNA constructed from L factor and a foreign gene was introduced into mouse embryonal carcinoma (F9) cells by transfection, the DNA was reestablished in the cells as a plasmid. The reestablished plasmid DNA in F9 cells could be rescued in Escherichia coli. The plasmid-bearing cells underwent normal in vitro differentiation in response to retinoic acid. The efficiency of plasmid establishment of the L-factor-derived DNA and transcriptional and transient replicational activities were compared with those of similar composite DNA constructed from polyomavirus and an embryonal carcinoma mutant of polyomavirus which is permissive in F9 cells. The results suggest an inverse relationship between the efficiency of the plasmid establishment and the activity of gene expression controlled by the intrinsic enhancer-promoter of the DNA.
authors.affiliation: Institute of Applied Microbiology, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nishimori
authors.forename: T
authors.initials: T
authors.lastname: Kohda
authors.forename: J
authors.initials: J
authors.lastname: Fujiwara
authors.forename: M
authors.initials: M
authors.lastname: Oishi
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D004261:DNA Replication; D004274:DNA, Recombinant; D004926:Escherichia coli / Q000235:genetics; D005786:Gene Expression Regulation / Q000187:drug effects; D005822:Genetic Vectors; D007739:L Cells; D051379:Mice; D010957:Plasmids; D011120:Polyomavirus / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D013724:Teratoma / Q000473:pathology*; D014212:Tretinoin / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000473:pathology
chemical_list: D004274:DNA, Recombinant; D011993:Recombinant Fusion Proteins; D014212:Tretinoin