A comparison regarding antiproliferative action between soy total extract and genistein

The aim of this study is to make a comparison between the action of genistein and total soy extract regarding anticancer action on two different in vivo models: phytobiological test and animal model, and to see which of the two tested samples present a greater antiproliferative effect. Soybean seeds were grounded and a solvent formed of DMSO-ethanol-water in rapport 5-70-25 v/v/v was prepared. The extraction was made using an ultrasonic bath (Falc LCD Series) for 30 minutes, 59 kHz. The solvent was evaporated with a rotary evaporator at 50°C. Genistein was acquired from Extrasynthèse (France), hydroxypropyl-γ-cyclodextrin (HPGCD) from Cyclolab Hungary, 7,12-dimethylbenz[a]anthracene (DMBA), dimethylsulfoxide (DMSO), and 12-O-tetradecanoylphorbol-13-acetate (TPA) from Sigma Aldrich, Germany. Because of the poor water solubility, genistein was prepared in a complex with hydroxypropyl-γ-cyclodextrin in a molar ratio 1:2 by kneading method and total soy extract in a mass ratio 1:4 also by kneading method. Phytobiological test indicated an inhibition index over 50% in case of solutions of concentration between 8-33% in both samples, suggesting a possible antiproliferative action at a superior level. Study on C57BL/6J mice was made on which it was induced cancer with physical agents like DMBA, and it was promoted with TPA. Mice where divided in four groups: Group A - blank group, Group B - mice who received total soy extract, Group C - mice who received genistein, Group D - untreated mice. Results on animal model show that both soy total extract and genistein inhibited the initiation and promotion of chemically-induced skin tumorigenesis, but genistein had a greater success in recovering skin lesions type experimental malignant melanoma.