Modifying effects of the enzyme inducers, phenobarbital and 3-methylcholanthrene, on dominant lethal events induced by 7, 12-dimethylbenz[a]anthracene in mice.
The effects of pretreatment with either phenobarbital (PB) or 3-methylcholanthrene (MC) on the induction of dominant lethal events by 7, 12-dimethylbenz[a]anthracene (DMBA) in male mice were studied. DMBA induced dominant lethals in both post- and pre-meiotic germ cells of mice. The incidences of DMBA-induced dominant lethals were markedly reduced in pre-meiotic germ cells by the pretreatment with PB, whereas a significant reduction of the lethal events in post-meiotic germ cells was observed with MC. No significant reduction of living implants was detected in pre-meiotic germ cells on pretreatment with PB. The contents of liver microsomal cytochrome p-450 of mice pretreated with PB or MC were about twice those of non-treated mice.
D015127:9,10-Dimethyl-1,2-benzanthracene / Q000494:pharmacology*; D000818:Animals; D001551:Benz(a)Anthracenes / Q000494:pharmacology*; D005260:Female; D005799:Genes, Dominant / Q000187:drug effects*; D005804:Genes, Lethal / Q000187:drug effects*; D008297:Male; D008540:Meiosis; D008748:Methylcholanthrene / Q000494:pharmacology*; D051379:Mice; D009154:Mutation; D010634:Phenobarbital / Q000494:pharmacology*; D011247:Pregnancy; D013094:Spermatozoa / Q000187:drug effects; D013997:Time Factors
D001551:Benz(a)Anthracenes; D008748:Methylcholanthrene; D015127:9,10-Dimethyl-1,2-benzanthracene; D010634:Phenobarbital