scholarly journals Photoionization access to cyclodextrin-encapsulated resveratrol phenoxy radicals and their repair by ascorbate across the phase boundary

2016 ◽  
Vol 18 (30) ◽  
pp. 20802-20811 ◽  
Author(s):  
Christoph Kerzig ◽  
Martin Goez
Keyword(s):  
Phase Boundary ◽  
Red Wine ◽  
Phenoxy Radical ◽  
Phenoxy Radicals

Photoionization with UV-A generates phenoxy radical ResO˙ of the famous red-wine antioxidant resveratrol inside cyclodextrin cavities without the participation of auxiliary reactants. This permits the isolated exploration of the ResO˙ repair by ascorbate at the water–cyclodextrin interface.

Reactivity of Free Radicals Generated from Neurotransmitters Studied by Electron Spin Resonance Spectroscopy

2004 ◽  
Vol 69 (11) ◽  
pp. 2081-2090 ◽  
Author(s):  
Alexander Tkáč ◽  
Eva Hanušovská
Keyword(s):  
Free Radicals ◽  
Electron Spin Resonance ◽  
Vitamin E ◽  
Unpaired Electron ◽  
Polar Solvent ◽  
Electron Spin Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Phenoxy Radical ◽  
Spin Resonance ◽  
Phenoxy Radicals

Free phenoxy radicals derived from catecholamine-type neurotransmitters (dopamine, noradrenaline, adrenaline) σ-coordinated to Co(III) chelates were generated by the reaction of π-coordinated tert-butylperoxy radicals with the neurotransmitters in non-polar solvent at ambient temperature. The ESR signals of the formed complexes are split into the basic octet line resulting from the interaction of the unpaired electron of the phenoxy radical with the 59Co nucleus (I = 7/2). Increasing the polarity of the solution starts the decomplexation and the liberated phenoxy radicals of the neurotransmitters disappear by recombination or by H-abstraction from the added antioxidant. When vitamin E is added to the system, only the ESR signal of the stable α-tocopheroxy radicals is detectable. Similarly, in the presence of the antiarrhytmic drug Stobadine, only the signal of the corresponding nitrogen-centred radical is seen. In the presence of both antioxidants, rapid H-transfer occurs from vitamin E to the Stobadine radicals.

Element and redox homeostasis in rats after red wine consumption

2011 ◽  
Vol 49 (05) ◽  
Author(s):  
K Szentmihályi ◽  
Z May ◽  
H Fébel ◽  
G Bekő ◽  
A Blázovics
Keyword(s):  
Red Wine ◽  
Redox Homeostasis ◽  
Wine Consumption

Red wine increases SHBG production by HepG2 cells

2014 ◽  
Author(s):  
Cristina Saez Lopez ◽  
Rafael Simo ◽  
Cristina Hernandez ◽  
David Martinez Selva
Keyword(s):  
Hepg2 Cells ◽  
Red Wine

Red wine extract, resveratrol, on maintenance of organ function following trauma-hemorrhage

2012 ◽  
Vol 2 (10) ◽  
pp. 351
Author(s):  
Fu-Chao Liu ◽  
Huang-Ping Yu
Keyword(s):  
Intracellular Signaling ◽  
Red Wine ◽  
Antioxidant Properties ◽  
Neutrophil Function ◽  
Protective Effects ◽  
Organ Function ◽  
Mitogen Activated Protein ◽  
Ros Formation ◽  
Anti Inflammatory ◽  
And Control

Resveratrol, is a polyphenol that can be extracted from grapes and red wine, possess potential anti-inflammatory effects, which would result in the reduction of cytokine production, the alteration of the expression of adhesion molecule molecules, and the inhibition of neutrophil function. Resveratrol might also act as an antioxidant, anti-aging, and control of cell cycle and apoptosis. Resveratrol has been shown to have protective effects for patients in shock-like states. Such protective phenomenon is reported to be implicated in a variety of intracellular signaling pathways including the regulation of the mitogen-activated protein kinases (MAPK)/ hemeoxygenase-1 (HO-1) pathway, activates estrogen receptor (ER), and the mediation of pro-inflammatory cytokines, reactive oxygen species (ROS) formation and reactive. Moreover, through anti-inflammatory effects and antioxidant properties, the resveratrol is believed to maintain organ function following trauma-hemorrhage.Key words: resveratrol, anti-inflammatory, trauma-hemorrhage.

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