title: Activation of K-ras and oncogenes other than ras family in rat fibrosarcomas induced by 1,8-dinitropyrene.
abstract: Oncogenes of fibrosarcomas of rats, induced by subcutaneous injection of 1,8-dinitropyrene (1,8-DNP), were examined by NIH 3T3 cell transfection assay and Southern blot analysis. Transformants containing rat specific repetitive sequences were obtained with DNAs of 4 fibrosarcomas, 1,8-DNP1, 1,8-DNP2, 1,8-DNP3 and 1,8-DNP7. A transformant, 1,8-DNP2-2, induced by DNA of a fibrosarcoma, 1,8-DNP2, and 7 secondary transformants derived from it contained rat K-ras sequences. Another transformant, 1,8-DNP2-1, induced by the same sarcoma did not have a ras family oncogene. This indicates that the sarcoma, 1,8-DNP2, has at least 2 transforming genes. The transforming genes of 6 other transformants derived from 3 sarcomas did not contain ras family or neu transforming genes.
mesh_terms: D000818:Animals; D002460:Cell Line; D004273:DNA, Neoplasm / Q000032:analysis; D004591:Electrophoresis, Polyacrylamide Gel; D005354:Fibrosarcoma / Q000139:chemically induced / Q000235:genetics*; D008297:Male; D009693:Nucleic Acid Hybridization; D009857:Oncogenes; D011721:Pyrenes; D051381:Rats; D011916:Rats, Inbred F344; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D004273:DNA, Neoplasm; D011721:Pyrenes; C033310:1,8-dinitropyrene