Extra virgin olive oil phenolic extracts counteract the pro-oxidant effect of dietary oxidized lipids in human intestinal cells
| Autor: | Gessica Serra, Giovanni Bandino, Monica Deiana, Alessandra Incani, Carlo Ignazio Giovanni Tuberoso, Piergiorgio Sedda, Angela Atzeri, Marco Campus, Maria Paola Melis, Gabriele Serreli |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Oxidative phosphorylation Toxicology medicine.disease_cause 03 medical and health sciences chemistry.chemical_compound Phenols medicine Humans Olive Oil Cell damage 030109 nutrition & dietetics Plant Extracts General Medicine Pro-oxidant medicine.disease Dietary Fats Lipids Tyrosol 030104 developmental biology chemistry Biochemistry Caco-2 Hydroxytyrosol Caco-2 Cells Oxidation-Reduction Oxidative stress Food Science |
| Zdroj: | Food and Chemical Toxicology. 90:171-180 |
| ISSN: | 0278-6915 |
| Popis: | The phenolic fraction of extra virgin olive oil (EVOO) concentrates before absorption in the intestinal lumen, where it may contribute to the modulation of enterocytes response to oxidative and inflammatory stimuli. We evaluated the ability of two monovarietal EVOOs phenolic extracts, Bosana and Nera di Gonnos/Tonda di Cagliari, typical and widespread varieties in Sardinia (Italy), to counteract in enterocytes like Caco-2 cells the pro-oxidant action of oxidized lipids, tert-butyl hydroperoxide (TBH) or a mixture of oxysterols of dietary origin. We confirmed that TBH treatment causes a significant increase of ROS production, GSH depletion, increase of MDA, fatty acids hydroperoxides and 7-ketocholesterol, and showed first evidence of oxidative imbalance and cell damage due to oxysterols exposure. Preincubation of cells with the phenolic extracts significantly attenuated oxidative modifications. Bosana extract showed the highest concentration of total phenols, mainly hydroxytyrosol and tyrosol, and was the most active in presence of TBH, where the free radical scavenging activity of these simple phenols seems to be a determining factor. The two extracts were equally effective, in spite of the different composition, in presence of oxysterols, where ROS production probably occurs according to different and more complex mechanisms. |
| Databáze: | OpenAIRE |
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