title: Antimutagenic effects of several subfractions of extract from wheat sprout toward benzo[a]pyrene-induced mutagenicity in strain TA98 of Salmonella typhimurium.
abstract: The aqueous extract from wheat sprouts contains some antimutagenic factor(s). The factor(s) abolish(es) the activity of aryl hydrocarbon (benzo[a]pyrene) hydroxylase (AHH) in the S9 fraction from Aroclor-treated rat livers and also inhibit(s) the mutagenic activity of benzo[a]pyrene (B(a)P) in the Ames test. The extract (fraction S30) was subjected to initial fractionation by thermal treatment, 3 24-h cycles of dialysis and ultrafiltration. The antigenotoxic activity of fraction S30 amounted to 98% and was unchanged by thermal treatment (100 degrees C, 10 min). Both the dialysate and the dialysis fluid inhibited the mutagenic effect of B(a)P by 48.4 and 48% respectively. The microsomal subfraction inhibited the mutagenicity only in 10%, and the postmicrosomal subfraction in 68%. It is concluded that the extract from wheat sprouts contains at least 2 heat-resistant compounds (or groups of compounds) located within the cell cytosol and showing antimutagenic activity: one group is of low molecular weight and another of high MW. Alternatively, low-molecular compounds could either be free or bound to high-molecular compound(s).
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000037:antagonists & inhibitors; D001564:Benzo(a)pyrene / Q000494:pharmacology*; D001711:Biotransformation; D008862:Microsomes, Liver / Q000201:enzymology; D009152:Mutagenicity Tests; D009153:Mutagens; D010936:Plant Extracts / Q000494:pharmacology*; D051381:Rats; D012486:Salmonella typhimurium / Q000187:drug effects* / Q000235:genetics; D014908:Triticum
chemical_list: D009153:Mutagens; D010936:Plant Extracts; D001564:Benzo(a)pyrene; D001189:Aryl Hydrocarbon Hydroxylases