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- W2115678897 abstract "1-Amino-2,4-dibromoanthraquinone (ADBAQ) is an anthraquinone-derived vat dye, and a potent carcinogen in laboratory animals. In a 2-year study with dietary exposure to 10,000 or 20,000 ppm ADBAQ, increased incidence of forestomach and lung tumors were observed in B6C3F1 mice. The present study indentified genetic alterations in H-ras and K-ras proto-oncogenes in ADBAQ-induced tumors. Point mutations in ras proto-oncogenes were identified by restriction fragment length polymorphism, single-stranded conformational polymorphism analysis and cycle sequencing of polymerase chain reaction-amplified DNA isolated from paraffin-embedded squamous cell papillomas and carcinomas in the forestomach, and alveolar/bronchiolar adenomas and carcinomas in the lung. A higher frequency of ras mutations was identified in ADBAQ-induced forestomach (23/32, 72%) and lung tumors (16/23, 70%) than in spontaneous forestomach (4/11, 36%) and lung tumors (26/86, 30%). H-ras codon 61 CTA mutations were detected in (4/8, 50%) ADBAQ-induced forestomach squamous cell papillomas and (10/24, 42%) squamous cell carcinomas, but not in the spontaneous forestomach tumors examined. H-ras codon 61 CGA mutation (6/24, 25%) was also detected in ADBAQ-induced forestomach squamous cell carcinomas. K-ras codon 61 A to T transversions and A to G transitions were prominent in ADBAQ-induced lung alveolar/bronchiolar adenomas and alveolar/bronchiolar carcinomas. The major finding of A to T transversions or A to G transitions in forestomach and lung tumors suggests that ADBAQ or its metabolites target adenine bases in the ras proto-oncogenes and that these mutations play a dominant role in multi-organ" @default.
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- W2115678897 date "2001-06-01" @default.
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- W2115678897 title "High Frequency of Ras Mutations in Forestomach and Lung Tumors of B6C3F1 Mice Exposed to 1-Amino-2,4-dibromoanthraquinone for 2 Years" @default.
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- W2115678897 doi "https://doi.org/10.1080/01926230152499908" @default.
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