title: Comparative effects of food-derived polyphenols on the viability and apoptosis of a human hepatoma cell line (HepG2).
abstract: Consumption of fruits and vegetables, which are rich in polyphenols, has been associated with a reduced risk of chronic diseases such as cancer. Dietary polyphenols have antioxidant and antiproliferative properties that might explain their beneficial effect on cancer prevention. The aim of this study was to investigate the effects of different pure polyphenols [quercetin, chlorogenic acid, and (-)-epicatechin] and natural fruit extracts (strawberry and plum) on viability or apoptosis of human hepatoma HepG2 cells. The treatment of cells for 18 h with quercetin and fruit extracts reduced cell viability in a dose-dependent manner; however, chlorogenic acid and (-)-epicatechin had no prominent effects on the cell death rate. Similarly, quercetin and strawberry and plum extracts, rather than chlorogenic acid and (-)-epicatechin, induced apoptosis in HepG2 cells. Moreover, quercetin and fruit extracts arrested the G1 phase in the cell cycle progression prior to apoptosis. Quercetin and strawberry and plum extracts may induce apoptosis and contribute to a reduced cell viability in HepG2 cells.
authors.affiliation: Department of Metabolism and Nutrition, Instituto del Frío, Consejo Superior de Investigaciones Científicas (CSIC), José Antonio Novais 10, Ciudad Universitaria, 28040, Madrid, Spain. s.ramos@if.csic.es
authors.forename: Sonia
authors.initials: S
authors.lastname: Ramos
authors.forename: Mario
authors.initials: M
authors.lastname: Alía
authors.forename: Laura
authors.initials: L
authors.lastname: Bravo
authors.forename: Luis
authors.initials: L
authors.lastname: Goya
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D006528:Carcinoma, Hepatocellular; D002392:Catechin / Q000494:pharmacology; D002453:Cell Cycle / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects*; D002726:Chlorogenic Acid / Q000494:pharmacology; D005419:Flavonoids / Q000494:pharmacology*; D031985:Fragaria; D005638:Fruit / Q000737:chemistry*; D006801:Humans; D008113:Liver Neoplasms; D010636:Phenols / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology; D059808:Polyphenols; D027861:Prunus; D011794:Quercetin / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols; D002726:Chlorogenic Acid; D002392:Catechin; D011794:Quercetin