title: Characterization of the integration site of the CMV mtr in a tumor cell line.
abstract: Previous studies have shown that a 558-bp fragment of human cytomegalovirus (CMV) DNA contained within pCM4127 and designated CMV mtr can morphologically transform rodents cells in vitro. By cotransformation with pCM4127 and a plasmid conferring G418 resistance, pSV2neo, morphologically transformed NIH3T3 cell lines were isolated. Dot blot hybridization indicated that approximately 30% of the transformants retained CMV sequences. Two cell lines which retained viral DNA were chosen for further study. They were capable of anchorage independent growth and formed tumors in nude mice. Integrated viral sequences in the transformants and tumor cell lines were analyzed by Southern blotting. A bacteriophage lambda library was constructed using a tumor cell line which retained a single copy of the viral sequences, and a phage was isolated which contained the integrated plasmid and the flanking cellular sequences. A complex rearrangement between pCM4127 and pSV2neo had occurred. DNA sequence analysis showed integration of the plasmid sequences into repetitive mouse DNA and identified an adjacent mouse sequence.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002472:Cell Transformation, Viral; D002478:Cells, Cultured; D003090:Coliphages / Q000235:genetics; D003587:Cytomegalovirus / Q000235:genetics*; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000235:genetics; D051379:Mice; D008819:Mice, Nude; D009693:Nucleic Acid Hybridization; D010957:Plasmids
chemical_list: D004279:DNA, Viral; D004262:DNA Restriction Enzymes