title: Enhancement of transcription of the SV40 genome in mouse embryo cells by pretreatment with 5-iodo-2'-deoxyuridine.
abstract: Treatment of mouse embryo (ME) cells with 5-iodo-2'-deoxyuridine (IdUrd) before infection with SV40 virus, enhances T-antigen (T-Ag) production as detected by immunofluorescence and complement fixation. Cellular DNA and RNA synthesis are inhibited in both SV40 and mock-infected cells after IdUrd treatment. The analogue pretreatment significantly increases the amount of radiolabelled nuclear and cytoplasmic SV40-specific RNA and the RNA polymerase activity of the viral transcriptional complexes of the Sarkosyl supernatants, suggesting that the enhancement of SV40 T-Ag production in infected pretreated ME cells results from an increased synthesis of early virus RNA.
mesh_terms: D000818:Animals; D000951:Antigens, Neoplasm; D000956:Antigens, Viral; D000957:Antigens, Viral, Tumor; D002460:Cell Line; D004279:DNA, Viral / Q000096:biosynthesis; D005814:Genes, Viral; D007065:Idoxuridine / Q000494:pharmacology*; D051379:Mice; D012333:RNA, Messenger / Q000096:biosynthesis; D012367:RNA, Viral / Q000096:biosynthesis; D013539:Simian virus 40 / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic / Q000187:drug effects*
chemical_list: D000951:Antigens, Neoplasm; D000956:Antigens, Viral; D000957:Antigens, Viral, Tumor; D004279:DNA, Viral; D012333:RNA, Messenger; D012367:RNA, Viral; D007065:Idoxuridine