19 October 2017
Int J Med Sci 2014; 11(7):742-747. doi:10.7150/ijms.7167
Short Research Communication
Cyanidin 3-O-Glucoside Reduces Helicobacter pylori VacA-Induced Cell Death of Gastric KATO III Cells through Inhibition of the SecA Pathway
1. Department of Clinical Laboratory Science, Semyung University, Jaecheon 390-711, Republic of Korea;
Two key virulence factors of Helicobacter pylori are the secreted virulent proteins of vacuolating toxin A (VacA) and cytotoxin associated protein A (CagA) which lead to damages of gastric epithelial cells. We previously identified that the cyanidin 3-O-glucoside (C3G) inhibits the secretion of both VacA and CagA. In the current report, we show that C3G inhibits VacA secretion in a dose-dependent manner by inhibiting secretion system subunit protein A (SecA) synthesis. As SecA is involved in translocation of bacterial proteins, we predicted that inhibition of the SecA pathway by C3G should decrease H. pylori-induced cell death. To test this hypothesis, the human gastric cell line KATO III cells were co-cultured with H. pylori 60190 (VacA+/CagA+) and C3G. We found that C3G treatment caused a decrease in activation of the pro-apoptotic proteins caspase-3/-8 in H. pylori-infected cells leading to a decrease in cell death. Our data suggest that consumption of foods containing anthocyanin may be beneficial in reducing cell damage due to H. pylori infection.
Keywords: H. pylori, cyanidin 3-O-glucoside, VacA secretion
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How to cite this article:
Kim SH, Woo H, Park M, Rhee KJ, Moon C, Lee D, Seo WD, Kim JB. Cyanidin 3-O-Glucoside Reduces Helicobacter pylori VacA-Induced Cell Death of Gastric KATO III Cells through Inhibition of the SecA Pathway. Int J Med Sci 2014; 11(7):742-747. doi:10.7150/ijms.7167. Available from http://www.medsci.org/v11p0742.htm