The effect of solvents on the antioxidant activity in Caco-2 cells of Irish brown seaweed extracts prepared using accelerated solvent extraction (ASE®)

Abstract

The antioxidant activities of extracts from the Irish seaweed Ascophyllum nodosum (AN), Fucus vesiculosus (FV) and Fucus serratus (FS) prepared using different solvents were assessed in Caco-2 cells. The extracts were prepared using 100% H2O (AN100, FV100, FS100), 60% ethanol (AN60e, FV60e, FS60e), 80% ethanol (AN80e, FV80e, FS80e) or 60% methanol (AN60m, FV60m, FS60m) combined with an accelerated solvent extraction (ASE®) technique. The cellular antioxidant status was determined by measuring catalase (CAT) and superoxide dismutase (SOD) activity and glutathione (GSH) content. The protective effects of the extracts against H2O2 and tert-BOOH-induced DNA damage were assessed using the comet assay. AN100 and AN80e significantly protected (P < 0.05) against H2O2-induced DNA damage. AN60e, AN80e, FS100, FS80e and FV60m protected against tert-BOOH-induced DNA damage. Extracts prepared from AN, particularly those prepared using 80% aqueous ethanol, appeared to have the greatest antioxidant potential, based on their ability to protect against oxidant-induced DNA damage.

Keywords

• Brown seaweed extract
• Accelerated solvent extraction (ASE®)
• Methanol
• Ethanol
• Cellular antioxidant
• Caco-2