Effect of Black Soybean Extract on the Suppression of the Proliferation of Human AGS Gastric Cancer Cells via the Induction of Apoptosis

• Published in: Journal of agricultural and food chemistry 2011-05, Vol.59 (9), p.4597-4605
• Main Authors: Zou, Yanping, Chang, Sam K. C
• Format: Article
• Language: English
• Subjects: acetone; antioxidant activity; apoptosis; Apoptosis - drug effects; bcl-2-Associated X Protein - genetics; bcl-2-Associated X Protein - metabolism; Bioactive Constituents; Biological and medical sciences; caspase-3; cell growth; Cell Line, Tumor; Cell Proliferation - drug effects; chemoprevention; Down-Regulation - drug effects; flow cytometry; Food industries; Fruit and vegetable industries; Fundamental and applied biological sciences. Psychology; Gene Expression Regulation, Neoplastic - drug effects; Glycine max - chemistry; growth retardation; Humans; inhibitory concentration 50; phenolic compounds; Plant Extracts - pharmacology; Proto-Oncogene Proteins c-bcl-2 - genetics; Proto-Oncogene Proteins c-bcl-2 - metabolism; soybeans; stomach neoplasms; Stomach Neoplasms - drug therapy; Stomach Neoplasms - genetics; Stomach Neoplasms - metabolism; Stomach Neoplasms - physiopathology
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf104945x

Black soybean is known to have a health-promoting effect because of its high content of polyphenolic compounds and antioxidant activities. The objective of the present study was to investigate the chemopreventive effects of black soybean extract against human AGS gastric cancer cells and its possible mechanism in inducing apoptosis. Black soybean extract was obtained by extracting black soybean with acidified aqueous acetone, and its phytochemical constituents, as determined by HPLC-DAD methods, were demonstrated to contain various phenolics. The black soybean extract inhibited AGS cell growth in a dose-dependent manner with an IC50 of 3.69 mg/mL as measured by the MTT assay. This growth inhibition effect was further confirmed by the CFDA-SE assay. Flow cytometry analysis showed that black soybean extract dose-dependently induced apoptosis of AGS cells. Moreover, the involvement of black soybean extract in inducing apoptosis was confirmed by the expression of Bax, Bcl-2, caspase-3, and PARP. The results of the present study indicated that black soybean extract could be used as an apoptosis inducer in AGS cells and a natural chemopreventive agent in the treatment of human gastric cancer