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Giffonins, Antioxidant Diarylheptanoids from Corylus avellana , and Their Ability to Prevent Oxidative Changes in Human Plasma Proteins by Milena Masullo; Gianluigi Lauro; Antonietta Cerulli; Bogdan Kontek; Beata Olas; Giuseppe Bifulco; Sonia Piacente; Cosimo Pizza is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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With the aim to explore the ability of diarylheptanoids to reduce oxidative changes in human plasma proteins, a phytochemical investigation of the MeOH extract of Corylus avellana leaves was perfomed. Analysis by LC-ESI/LTQOrbitrap/ MS/MS n guided the isolation of two new diarylheptanoid derivatives, giffonins W (1) and X (2). The structures 1 and 2 were assigned by analysis of NMR data combined with a QM (quantum mechanical)/NMR approach. The absolute configurations of 1 and 2 were established by analysis of electronic circular dichroism (ECD) spectra compared with the TDDFTsimulated curves. The antioxidant activity of the new and known giffonins was evaluated by inhibition of human plasma lipid peroxidation. Giffonins with the highest inhibitory activity were tested for their ability to reduce oxidation of thiol groups and carbonylation in plasma proteins, and some of them exhibited higher antioxidant activity than curcumin.

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Author

Milena Masullo; Gianluigi Lauro; Antonietta Cerulli; Bogdan Kontek; Beata Olas; Giuseppe Bifulco; Sonia Piacente; Cosimo Pizza

Publisher

American Chemical Society (ACS)

Published

2021

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)