Grape waste extract obtained by supercritical fluid extraction contains bioactive antioxidant molecules and induces antiproliferative effects in human colon adenocarcinoma cells.

Abstract

Grape waste management is one of the main problems of winery industries, but, conversely, grape waste contains a high amount of polyphenols that might protect against human diseases related to oxidative stress, such as colorectal cancer. Therefore, the aim of this work was to investigate the antioxidant and antiproliferative activities of a grape waste extract obtained by supercritical fluid extraction. Because the beneficial effect of grape is related to its content of polyphenolic molecules, the extract was chemically characterized by high-performance liquid chromatography in order to assess its major bioactive components. The antioxidant activity of the grape extract was determined. The results showed that the grape extract presents a strong antiradical activity in the in vitro 2,2-diphenyl-1-picrylhydrazyl radical assay and protects against reactive oxygen species production in human colon adenocarcinoma cells (Caco-2). In contrast, the extract did not protect in the citronellal thermooxidation system and showed a weak protective action against lipid peroxidation in Caco-2 cells. The clonogenic assay and the cell cycle distribution analysis showed that the grape extract has a significant antiproliferative effect in a tumor cell line. These data indicate that grape extract is a promising product to be used as an anti-free radical agent and could exert a chemopreventive action.

• Authors: Maria Claudia Lazzè, Roberto Pizzala, Francisco Javier Gutiérrez Pecharromán, Paloma Gatòn Garnica, Juan Manuel Antolín Rodríguez, Nicola Fabris, Livia Bianchi
• Journal: Journal of medicinal food (J Med Food) Vol. 12 Issue 3 Pg. 561-8 (Jun 2009) ISSN: 1557-7600 [Electronic] United States
• PMID: 19627204 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antineoplastic Agents, Phytogenic
• Antioxidants
• Biphenyl Compounds
• Flavonoids
• Free Radicals
• Phenols
• Picrates
• Plant Extracts
• Polyphenols
• Reactive Oxygen Species
• 1,1-diphenyl-2-picrylhydrazyl

Topics

• Adenocarcinoma (drug therapy, metabolism)
• Antineoplastic Agents, Phytogenic (pharmacology, therapeutic use)
• Antioxidants (pharmacology, therapeutic use)
• Biphenyl Compounds
• Caco-2 Cells
• Cell Line, Tumor
• Cell Proliferation (drug effects)
• Chromatography, High Pressure Liquid
• Colonic Neoplasms (drug therapy, metabolism)
• Flavonoids (pharmacology, therapeutic use)
• Free Radicals (metabolism)
• Fruit
• Humans
• Lipid Peroxidation (drug effects)
• Phenols (pharmacology, therapeutic use)
• Phytotherapy
• Picrates
• Plant Extracts (pharmacology, therapeutic use)
• Polyphenols
• Reactive Oxygen Species (metabolism)
• Vitis (chemistry)
• Waste Management (methods)