Mutagenic specificities of four stereoisomeric benzo[c]phenanthrene dihydrodiol epoxides.
AUTOR(ES)
Bigger, C A
RESUMO
The pS189 shuttle vector carrying a supF target gene was used to compare the mutagenic specificities of the four configurational isomers of benzo[c]phenanthrene 3,4-dihydrodiol 1,2-epoxide. One of these isomers is the most tumorigenic dihydrodiol epoxide tested to date and another is essentially inactive as a tumorigen. Overall mutagenicities were not correlated with tumorigenicities, but each configurational isomer induced a unique spectrum of mutational hot spots in the supF target gene, which monitors primarily point mutations. It is suggested that the demonstrated isomer-specific selectivity for mutation targets within the supF gene may be indicative of a similar selectivity for one gene versus another and that such selectivity may be one determinant of relative tumorigenicity.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=48238Documentos Relacionados
- Mutagenic specificity of a potent carcinogen, benzo[c]phenanthrene (4R,3S)-dihydrodiol (2S,1R)-epoxide, which reacts with adenine and guanine in DNA.
- Human RNA polymerase II is partially blocked by DNA adducts derived from tumorigenic benzo[c]phenanthrene diol epoxides: relating biological consequences to conformational preferences
- Translesion replication of benzo[a]pyrene and benzo[c]phenanthrene diol epoxide adducts of deoxyadenosine and deoxyguanosine by human DNA polymerase ι
- Nucleotide incorporation by human DNA polymerase γ opposite benzo[a]pyrene and benzo[c]phenanthrene diol epoxide adducts of deoxyguanosine and deoxyadenosine
- Metabolic conversion of dibenz[a,h]anthracene (+/-)trans-1,2-dihydrodiol and chrysene (+/-)trans-3,4-dihydrodiol to vicinal dihydrodiol epoxides.