title: Structure and expression of mos sequences in spontaneous and Moloney murine sarcoma virus-induced yolk sac carcinomas in rats.
abstract: Facilitation of yolk-sac carcinoma (YSCa) development in fetectomized rats by the Moloney murine sarcoma virus/murine leukemia virus (Mo-MSV/MLV) complex was found to be closely associated with the presence of Mo-MSV sequences in the genomes of the YSCa cells. The virus-induced YSCas consisted of cells of mono- or oligoclonal origin which always contained in their genomes at least I randomly integrated Mo-MSV provirus. In YSCas which developed in the absence of virus, no rearrangement or amplification of c-mos could be detected. In addition, blot hybridization analysis of cellular RNA failed to detect mos-related RNA in cell lines derived from Mo-MSV-induced as well as from non-virally induced YSCas. The methylation level of c-mos DNA was low in all YSCa cell lines. In contrast, v-mos DNA in cell lines derived from Mo-MSV-induced YSCas was heavily methylated.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D004247:DNA / Q000032:analysis; D004407:Dysgerminoma / Q000235:genetics*; D008745:Methylation; D008980:Moloney murine sarcoma virus / Q000235:genetics*; D009857:Oncogenes; D011519:Proto-Oncogenes; D051381:Rats; D011919:Rats, Inbred Strains; D009053:Sarcoma Viruses, Murine / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D004247:DNA