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- 저자 : Vassiliki G. Kontogianni (검색결과 1 건)
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Olive Leaf Extracts Are a Natural Source of Advanced Glycation End Product Inhibitors
Vassiliki G. Kontogianni,Pantelis Charisiadis,Evangelia Margianni,Fotini N. Lamari,Ioannis P. Gerothanassis,Andreas G. Tzakos 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.9
Advanced glycation end products (AGEs), which are readily formed and accumulated with sustained hyperglycemia,contribute to the development of diabetic complications. As a consequence, inhibition of AGE formation constitutes an attractive therapeutic/preventive target. In the current study, we explored the phytochemical composition and the in vitro effect of two different olive leaf extracts (an aqueous and a methanolic) on AGE formation. The methanolic olive leaf extract inhibited fluorescent AGE formation in a bovine serum albumin (BSA)-ribose system, whereas the aqueous extract had no effect in both BSA-fructose and BSA-ribose systems. The phytochemical profile was investigated with liquid chromatographyultraviolet-visible (UV-Vis) diode array coupled to electrospray ionization multistage mass spectrometry (LC/DAD/ESIMSn). Quantification of the major phenolic compounds was performed with high performance liquid chromatography with UV-Vis diode array detection and nuclear magnetic resonance spectroscopy. Among the major phenolic components (luteolin,hydroxytyrosol, luteolin-40-O-b-D-glucopyranoside, luteolin-7-O-b-D-glucopyranoside, and oleuropein), luteolin and luteolin-40-O-b-D-glucopyranoside were assigned as potent inhibitors of AGE formation. The extraction procedure greatly affects the composition and therefore the anti-glycation potential of olive leaves.
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