Revalorisation of rapeseed pomace extracts: an in vitro study into its anti-oxidant and DNA protective properties.

Pohl, Franziska; Goua, Marie; Bermano, Giovanna; Russell, Wendy R.; Scobbie, Lorraine; Maciel, Patr�cia; Kong Thoo Lin, Paul

Abstract

Rapeseed pomace (RSP) is a waste product obtained after edible oil production from Brassica napus. Analysis of ubiquitous secondary metabolites in RSP samples (two breeds, harvested in 2012/2014 respectively from North East of Scotland) and their ethanol/water (95:5) Soxhlet extracts were carried out. Soxhlet extraction of the RSP (petroleum ether followed by 95% ethanol) gave a solid extract. LC-MS/MS data of the extracts revealed several secondary metabolites, with Sinapic acid being the most abundant. Strong antioxidant activities of the Soxhlet extracts were confirmed from the results obtained in the FRAP, DPPH and ORAC assays. Furthermore, for the very first time, RSP extracts (13.9 {aelig}g/ml) provided complete DNA protection, from oxidative stress induced by AAPH (3.5 mM). Therefore the strong antioxidant and DNA protecting properties demonstrated by the RSP extracts in this study warrants further investigation for their revalorisation and potential use as reliable source of antioxidants in different food applications.

Citation

POHL, F., GOUA, M., BERMANO, G., RUSSELL, W.R., SCOBBIE, L., MACIEL, P. and KONG THOO LIN, P. 2018. Revalorisation of rapeseed pomace extracts: an in vitro study into its anti-oxidant and DNA protective properties. Food chemistry [online], 239, pages 323-332. Available from: https://doi.org/10.1016/j.foodchem.2017.06.129

• Journal Article Type: Article
• Acceptance Date: Jun 21, 2017
• Online Publication Date: Jun 23, 2017
• Publication Date: Jan 15, 2018
• Deposit Date: Jun 29, 2017
• Publicly Available Date: Jun 24, 2018
• Journal: Food chemistry
• Print ISSN: 0308-8146
• Electronic ISSN: 1873-7072
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 239
• Pages: 323-332
• DOI: https://doi.org/10.1016/j.foodchem.2017.06.129
• Keywords: Rapeseed pomace; Soxhlet extraction; Reducing capacity (FC); Phenolics; Radical scavenging activity (DPPH); Ferric iron reducing antioxidant power (FRAP); Oxygenradical absorbance capacity assay (ORAC); pBR322 plasmid DNA
• Public URL: http://hdl.handle.net/10059/2393