Evaluation of antioxidant activity of alpha-tocopherol and quercetin during oxidation of phosphatidylcholine using chemiluminescent detection of lipid hydroperoxides

• Autorzy: Rolewski P. , Siger A. , Nogala-Kalucka M. , Polewski K.
• Języki publikacji: EN

Abstrakty

EN

Lipid hydroperoxides are relatively stable intermediates during oxidation of fats and lipids. Lipid hydroperoxide formation during phosphatidylcholine thermal autoxidation was measured with the luminol-enhanced chemiluminescent (LCL) method. The method optimized for best noise/ signal ratio provided a reliable and sensitive data up to 50 pmol/L of detected hydroperoxide. The observed chemiluminescence was calibrated with (9Z,11E,13S)-hydroperoxyoctadeca-9,11-dienoic acid (13-HPODE) as an external standard. To validate this method the spectrophotometric assay at 234 nm was compared with LCL results and high correlation was found. The presence of antioxidants inhibited chemiluminescence in a dose‑dependent manner. Quercetin at low concentration, up to 2 μmol/L, whereas α-T above 20 μmol/L exhibited prooxidative properties. Possible mechanisms were discussed. The described LCL method is sensitive, fast and simple, is not specific to the lipids but may be used to determine the presence of the other types of peroxides.

• Wydawca: -
• Czasopismo: Polish Journal of Food and Nutrition Sciences
• Rocznik: 2009
• Tom: 59
• Numer: 2
• Opis fizyczny: p.123-127,fig.,ref.

Twórcy

autor

Rolewski P.

• Department of Physics, Faculty of Food Science and Nutrition, Poznan University of Life Sciences, Wojska Polskiego 38/42, 60-637 Poznan, Poland

autor

Siger A.

autor

Nogala-Kalucka M.

autor

Polewski K.

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Uwagi

PL

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