Publication details

Contents of Sulforaphane and Total Isothiocyanates, Antimutagenic Activity, and Inhibition of Clastogenicity in Pulp Juices from Cruciferous Plants

Authors

TOTUŠEK Jiří TŘÍSKA Jan LEFNEROVÁ Danuše STROHALM Jan VRCHOTOVÁ Naděžda ZENDULKA Ondřej PRŮCHOVÁ Jiřina CHALOUPKOVÁ Jana NOVOTNÁ Pavla HOUŠKA Milan

Year of publication 2011
Type Article in Periodical
Magazine / Source Czech Journal of Food Sciences
MU Faculty or unit

Faculty of Medicine

Citation
Field Other medical specializations
Keywords cruciferous vegetables; juice; antimutagenic effects; sulforaphane; isothiocyanates
Description The consumption of Cruciferous vegetables is important for the prevention of cancerous diseases, particularly colorectal cancer. The effects of technological treatments (freezing, pasteurisation, high-pressure treatment) on the content of isothiocyanates, considered to be the active substance, were observed in single-species vegetable juices prepared from cruciferous vegetables (broccoli, cauliflower, Brussels sprouts, white and red cabbage). The contents of sulforaphane and total isothiocyanates were studied relative to the temperature, action period, and time delay after juice pressing. Sulforaphane and total isothiocyanates were determined by HPLC. Sulforaphane content in various parts of fresh broccoli was also assessed. Antimutagenic activity of the juices (frozen, pasteurised, and high-pressure treated) was evaluated using the Ames test and the following mutagens: AFTB1 (aflatoxin B1), IQ (2-amino-3-methyl-3H-imidazo-[ 4,5-f]quinoline), and MNU (2-nitroso-2-methylurea). Clastogenicity inhibition of the mutagens, in response to broccoli juice, as well as of pure sulforaphane, was observed using an in vivo experiment (the micronucleus test). It was shown that in terms of sulforaphane content, it is best to let broccoli juice stand for 60 min after pressing and pH adjustment. Sulforaphane content does not change under heating to 60 deg.C. Its content decreases considerably (compared to fresh juice) with heating to higher temperatures than 60 deg.C. High-pressure treatment preserves mutagenic inhibition to the same degree as juices freezing.
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