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The clastogenic effects of isothiocyanates
1AFRC Institute of Food Research, Norwich Laboratory, Norwich Research Park, Colney, UK.
Abstract:
Four isothiocyanates (ITCs), three of which are commonly found in the human diet, were tested for the ability to induce chromosome aberrations in an SV40-transformed Indian muntjac cell line. Whilst allyl ITC was found to be inactive the other three (benzyl ITC, phenethyl ITC and phenyl ITC) were found to be significant inducers of chromosome damage in the absence of any metabolic activation. Given that experimental data have demonstrated that ITCs can also protect laboratory animals from the induction of tumours by model carcinogens it is proposed that the presence of ITCs in the human diet may, potentially, have both beneficial and harmful consequences depending on the levels consumed.
Insights
Dietary isothiocyanates (ITCs) can induce chromosome damage, with benzyl, phenethyl, and phenyl ITCs showing significant activity. This suggests potential dual health effects from ITCs in food, depending on consumption levels.
Area of Science:
- * Chemical toxicology
- * Cell biology
- * Nutritional science
Background:
- * Isothiocyanates (ITCs) are compounds found in cruciferous vegetables and are known for their potential health effects.
- * Previous research suggests ITCs may have protective roles against carcinogens.
- * The genotoxic potential of dietary ITCs requires further investigation.
Purpose of the Study:
- * To evaluate the chromosome-damaging potential of four isothiocyanates (ITCs).
- * To determine if metabolic activation is required for ITC-induced genotoxicity.
- * To assess the implications of ITC genotoxicity in the context of human diet and cancer risk.
Main Methods:
- * Testing of four ITCs (allyl, benzyl, phenethyl, phenyl) for clastogenic activity.
- * Use of an SV40-transformed Indian muntjac cell line.
- * Assessment of chromosome aberrations in the absence of metabolic activation.
Main Results:
- * Allyl ITC did not induce chromosome aberrations.
- * Benzyl ITC, phenethyl ITC, and phenyl ITC significantly induced chromosome damage.
- * Genotoxicity was observed without the need for metabolic activation.
Conclusions:
- * Certain dietary ITCs possess clastogenic properties, capable of causing direct DNA damage.
- * The genotoxic effects of ITCs highlight a potential risk associated with their consumption.
- * Dietary ITCs may exert dual effects, potentially beneficial (anti-cancer) and harmful (genotoxic), necessitating a dose-dependent evaluation.