Type C RNA Tumor Viruses as Determinants of Chemical Carcinogenesis: Effects of Sequence of Treatment
Paul J. Price 1,
William A. Suk 1, and
Aaron E. Freeman 1
1 Microbiological Associates, Inc., Bethesda, Maryland 20014
Fischer rat embryo cells were treated with 3-methylcholanthrene before or after inoculation with Rauscher murine leukemia virus. Transformation was not observed in untreated control cultures, cultures given virus or 3-methyl-cholanthrene alone, or cultures treated first with 3-methylcholanthrene followed by inoculation with the virus after removal of the chemical. Transformation was dependent upon the presence of Rauscher murine leukemia virus at the time of chemical treatment.