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Incidence of mutations at codon 61 of the Ha-ras gene in liver tumors of mice genetically susceptible and resistant to hepatocarcinogenesis. 1991

T A Dragani, and G Manenti, and B M Colombo, and F S Falvella, and M Gariboldi, and M A Pierotti, and G Della Porta
Division of Experimental Oncology A, Istituto Nazionale Tumori, Milan, Italy.

By selective oligonucleotide hybridization of polymerase chain reaction (PCR) amplified tumor DNAs we have analysed the incidence of mutations at codon 61 of the Ha-ras gene in 42 liver tumors spontaneously developed in Balb/c, C3Hf and B6C3 male mice, and in 79 liver tumors induced by the chemical carcinogens diethylnitrosamine (NDEA) and urethan in B6C3 and B6C male and female mice. The incidence of Ha-ras gene mutations in both spontaneously developed and urethan-induced liver tumors was 50%-63% in mice genetically susceptible to hepatocarcinogenesis (C3Hf, B6C3) and 7%-9% in mice genetically resistant (Balb/c, B6C). Urethan-induced tumors showed about the same incidence of ras mutations in male and in female B6C3 mice. NDEA-induced tumors showed a low incidence of Ha-ras mutations in both the hybrid mice (3/18 and 1/13 in B6C3 and B6C male mice, respectively). The most frequently found mutations were a C----A transversion at the 1st base of codon 61 in spontaneous tumors, and an A----T transversion at the 2nd base in urethan-induced tumors. Our results indicate that liver tumors induced by NDEA or urethan or spontaneously arisen have a different pattern of Ha-ras mutations at codon 61 and that these mutations constitute a rare molecular alteration in the pathogenesis of liver tumors in genetically resistant mice.

UI MeSH Term Description Entries
D008114 Liver Neoplasms, Experimental Experimentally induced tumors of the LIVER. Hepatoma, Experimental,Hepatoma, Morris,Hepatoma, Novikoff,Experimental Hepatoma,Experimental Hepatomas,Experimental Liver Neoplasms,Hepatomas, Experimental,Neoplasms, Experimental Liver,Experimental Liver Neoplasm,Liver Neoplasm, Experimental,Morris Hepatoma,Novikoff Hepatoma
D008297 Male Males
D008815 Mice, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation. Inbred Mouse Strains,Inbred Strain of Mice,Inbred Strain of Mouse,Inbred Strains of Mice,Mouse, Inbred Strain,Inbred Mouse Strain,Mouse Inbred Strain,Mouse Inbred Strains,Mouse Strain, Inbred,Mouse Strains, Inbred,Strain, Inbred Mouse,Strains, Inbred Mouse
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D011905 Genes, ras Family of retrovirus-associated DNA sequences (ras) originally isolated from Harvey (H-ras, Ha-ras, rasH) and Kirsten (K-ras, Ki-ras, rasK) murine sarcoma viruses. Ras genes are widely conserved among animal species and sequences corresponding to both H-ras and K-ras genes have been detected in human, avian, murine, and non-vertebrate genomes. The closely related N-ras gene has been detected in human neuroblastoma and sarcoma cell lines. All genes of the family have a similar exon-intron structure and each encodes a p21 protein. Ha-ras Genes,Ki-ras Genes,N-ras Genes,c-Ha-ras Genes,c-Ki-ras Genes,c-N-ras Genes,ras Genes,v-Ha-ras Genes,v-Ki-ras Genes,H-ras Genes,H-ras Oncogenes,Ha-ras Oncogenes,K-ras Genes,K-ras Oncogenes,Ki-ras Oncogenes,N-ras Oncogenes,c-H-ras Genes,c-H-ras Proto-Oncogenes,c-Ha-ras Proto-Oncogenes,c-K-ras Genes,c-K-ras Proto-Oncogenes,c-Ki-ras Proto-Oncogenes,c-N-ras Proto-Oncogenes,ras Oncogene,v-H-ras Genes,v-H-ras Oncogenes,v-Ha-ras Oncogenes,v-K-ras Genes,v-K-ras Oncogenes,v-Ki-ras Oncogenes,Gene, Ha-ras,Gene, Ki-ras,Gene, v-Ha-ras,Gene, v-Ki-ras,Genes, Ha-ras,Genes, Ki-ras,Genes, N-ras,Genes, v-Ha-ras,Genes, v-Ki-ras,H ras Genes,H ras Oncogenes,H-ras Gene,H-ras Oncogene,Ha ras Genes,Ha ras Oncogenes,Ha-ras Gene,Ha-ras Oncogene,K ras Genes,K ras Oncogenes,K-ras Gene,K-ras Oncogene,Ki ras Genes,Ki ras Oncogenes,Ki-ras Gene,Ki-ras Oncogene,N ras Genes,N ras Oncogenes,N-ras Gene,N-ras Oncogene,c H ras Genes,c H ras Proto Oncogenes,c Ha ras Genes,c Ha ras Proto Oncogenes,c K ras Genes,c K ras Proto Oncogenes,c Ki ras Genes,c Ki ras Proto Oncogenes,c N ras Genes,c N ras Proto Oncogenes,c-H-ras Gene,c-H-ras Proto-Oncogene,c-Ha-ras Gene,c-Ha-ras Proto-Oncogene,c-K-ras Gene,c-K-ras Proto-Oncogene,c-Ki-ras Gene,c-Ki-ras Proto-Oncogene,c-N-ras Gene,c-N-ras Proto-Oncogene,ras Gene,ras Oncogenes,v H ras Genes,v H ras Oncogenes,v Ha ras Genes,v Ha ras Oncogenes,v K ras Genes,v K ras Oncogenes,v Ki ras Genes,v Ki ras Oncogenes,v-H-ras Gene,v-H-ras Oncogene,v-Ha-ras Gene,v-Ha-ras Oncogene,v-K-ras Gene,v-K-ras Oncogene,v-Ki-ras Gene,v-Ki-ras Oncogene
D003062 Codon A set of three nucleotides in a protein coding sequence that specifies individual amino acids or a termination signal (CODON, TERMINATOR). Most codons are universal, but some organisms do not produce the transfer RNAs (RNA, TRANSFER) complementary to all codons. These codons are referred to as unassigned codons (CODONS, NONSENSE). Codon, Sense,Sense Codon,Codons,Codons, Sense,Sense Codons
D004052 Diethylnitrosamine A nitrosamine derivative with alkylating, carcinogenic, and mutagenic properties. Nitrosodiethylamine,N-Nitrosodiethylamine,N Nitrosodiethylamine
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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