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Giampieri F, Alvarez-Suarez JM, Cordero MD, Gasparrini M, Forbes-Hernandez TY, Afrin S, Santos-Buelga C, González-Paramás AM, Astolfi P, Rubini C, Zizzi A, Tulipani S, Quiles JL, Mezzetti B, Battino M. Strawberry consumption improves aging-associated impairments, mitochondrial biogenesis and functionality through the AMP-activated protein kinase signaling cascade. Food Chem 2017; 234:464-471. [PMID: 28551262 DOI: 10.1016/j.foodchem.2017.05.017] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/27/2017] [Accepted: 05/02/2017] [Indexed: 01/22/2023]
Abstract
Dietary polyphenols have been recently proposed as activators of the AMP-activated protein kinase (AMPK) signaling pathway and this fact might explain the relationship between the consumption of polyphenol-rich foods and the slowdown of the progression of aging. In the present work, the effects of strawberry consumption were evaluated on biomarkers of oxidative damage and on aging-associated reductions in mitochondrial function and biogenesis for 8weeks in old rats. Strawberry supplementation increased antioxidant enzyme activities, mitochondrial biomass and functionality, and decreased intracellular ROS levels and biomarkers of protein, lipid and DNA damage (P<0.05). Furthermore, a significant (P<0.05) increase in the expression of the AMPK cascade genes, involved in mitochondrial biogenesis and antioxidant defences, was also detected after strawberry intake. These in vivo results were then verified in vitro on HepG2 cells, confirming the involvement of AMPK in the beneficial effects exerted by strawberry against aging progression.
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Affiliation(s)
- Francesca Giampieri
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO)-Sez. Biochimica, Facoltà di Medicina, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy
| | - Josè M Alvarez-Suarez
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO)-Sez. Biochimica, Facoltà di Medicina, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy; Escuela de Medicina Veterinaria y Zootecnia, Facultad de Ciencias de la Salud, Universidad de Las Américas (UDLA), Jose Queri, Quito 170125, Ecuador.
| | - Mario D Cordero
- Research Laboratory, Oral Medicine Department, Universidad de Sevilla, C/Avicena s/n, 41009 Seville, Spain
| | - Massimiliano Gasparrini
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO)-Sez. Biochimica, Facoltà di Medicina, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy
| | - Tamara Y Forbes-Hernandez
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO)-Sez. Biochimica, Facoltà di Medicina, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy; Area de Nutrición y Salud, Universidad Internacional Iberoamericana (UNINI), Calle 15, 24560 Campeche, Mexico
| | - Sadia Afrin
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO)-Sez. Biochimica, Facoltà di Medicina, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy
| | - Celestino Santos-Buelga
- Grupo de Investigación en Polifenoles (GIP-USAL), Faculty of Pharmacy, Salamanca University, Campus Miguel de Unamuno, E-37007 Salamanca, Spain
| | - Ana M González-Paramás
- Grupo de Investigación en Polifenoles (GIP-USAL), Faculty of Pharmacy, Salamanca University, Campus Miguel de Unamuno, E-37007 Salamanca, Spain
| | - Paola Astolfi
- Dipartimento Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica, Università Politecnica delle Marche, Via Brecce Bianche 12, 60131 Ancona, Italy
| | - Corrado Rubini
- Dipartimento di Scienze Biomediche e Sanita' Pubblica, Sez. Anatomia Patologica, Università Politecninca delle Marche, Via Conca 71, 60126 Ancona, Italy
| | - Antonio Zizzi
- Dipartimento di Scienze Biomediche e Sanita' Pubblica, Sez. Anatomia Patologica, Università Politecninca delle Marche, Via Conca 71, 60126 Ancona, Italy
| | - Sara Tulipani
- Biomarkers & Nutrimetabolomic Lab, Nutrition & Food Science Dept, XaRTA, INSA, Campus Torribera, Pharmacy and Food Science Faculty, University of Barcelona, 08028, Spain; Biomedical Research Institute [IBIMA], Service of Endocrinology and Nutrition, Malaga Hospital Complex [Virgen de la Victoria], Campus de Teatinos s/n, Malaga, Spain
| | - Josè L Quiles
- Departamento de Fisiologia, Instituto de Nutrición y Tecnología de los Alimentos "José Mataix", Centro de Investigaciones Biomedicas, Universidad de Granada, 18100 Granada, Spain
| | - Bruno Mezzetti
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy
| | - Maurizio Battino
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO)-Sez. Biochimica, Facoltà di Medicina, Università Politecnica delle Marche, Via Ranieri 65, 60131 Ancona, Italy; Centre for Nutrition & Health, Universidad Europea del Atlantico (UEA), C/Isabel Torres 21, 39011 Santander, Spain.
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Witwicki M, Jezierska J. Toward an Understanding of the Ambiguous Electron Paramagnetic Resonance Spectra of the Iminoxy Radical from o-Fluorobenzaldehyde Oxime: Density Functional Theory and ab Initio Studies. J Phys Chem A 2015; 119:9109-20. [PMID: 26258434 DOI: 10.1021/acs.jpca.5b06143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Iminoxy radicals (R1R2C═N—O•) possess an inherent ability to exist as E and Z isomers. Although isotropic hyperfine couplings for the species with R1 = H allow one to distinguish between E and Z, unequivocal assignment of the parameters observed in the EPR spectra of the radicals without the hydrogen atom at the azomethine carbon to the right isomer is not a simple task. The iminoxyl derived from o-fluoroacetophenone oxime (R1 = CH3 and R2 = o-FC6H5) appears to be a case in point. Moreover, for its two isomers the rotation of the o-FC6H5 group brings into existence the syn and anti conformers, depending on the mutual orientation of the F atom and C═N—O• group, making a description of hyperfine couplings to structure even more challenging. To accomplish this, a vast array of theoretical methods (DFT, OO-SCS-MP2, QCISD) was used to calculate the isotropic hyperfine couplings. The comparison between experimental and theoretical values revealed that the E isomer is the dominant radical form, for which a fast interconversion between anti and syn conformers is expected. In addition, the origin of the significant AF increase with solvent polarity was analyzed.
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Rosselin M, Choteau F, Zéamari K, Nash KM, Das A, Lauricella R, Lojou E, Tuccio B, Villamena FA, Durand G. Reactivities of substituted α-phenyl-N-tert-butyl nitrones. J Org Chem 2014; 79:6615-26. [PMID: 24968285 PMCID: PMC4216227 DOI: 10.1021/jo501121g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
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In
this work, a series of α-phenyl-N-tert-butyl nitrones bearing one, two, or three substituents
on the tert-butyl group was synthesized. Cyclic voltammetry
(CV) was used to investigate their electrochemical properties and
showed a more pronounced substituent effect for oxidation than for
reduction. Rate constants of superoxide radical (O2•–) reactions with nitrones were determined using
a UV–vis stopped-flow method, and phenyl radical (Ph•) trapping rate constants were measured by EPR spectroscopy. The
effect of N-tert-butyl substitution
on the charge density and electron density localization of the nitronyl
carbon as well as on the free energies of nitrone reactivity with
O2•– and HO2• were computationally rationalized at the PCM/B3LYP/6-31+G**//B3LYP/6-31G*
level of theory. Theoretical and experimental data showed that the
rates of the reaction correlate with the nitronyl carbon charge density,
suggesting a nucleophilic nature of O2•– and Ph• addition to the nitronyl carbon atom.
Finally, the substituent effect was investigated in cell cultures
exposed to hydrogen peroxide and a correlation between the cell viability
and the oxidation potential of the nitrones was observed. Through
a combination of computational methodologies and experimental methods,
new insights into the reactivity of free radicals with nitrone derivatives
have been proposed.
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Affiliation(s)
- Marie Rosselin
- Avignon Université , Equipe Chimie Bioorganique et Systèmes Amphiphiles, 33 rue Louis Pasteur, F-84000 Avignon, France
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Potential implication of the chemical properties and bioactivity of nitrone spin traps for therapeutics. Future Med Chem 2012; 4:1171-207. [PMID: 22709256 DOI: 10.4155/fmc.12.74] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Nitrone therapeutics has been employed in the treatment of oxidative stress-related diseases such as neurodegeneration, cardiovascular disease and cancer. The nitrone-based compound NXY-059, which is the first drug to reach clinical trials for the treatment of acute ischemic stroke, has provided promise for the development of more robust pharmacological agents. However, the specific mechanism of nitrone bioactivity remains unclear. In this review, we present a variety of nitrone chemistry and biological activity that could be implicated for the nitrone's pharmacological activity. The chemistries of spin trapping and spin adduct reveal insights on the possible roles of nitrones for altering cellular redox status through radical scavenging or nitric oxide donation, and their biological effects are presented. An interdisciplinary approach towards the development of novel synthetic antioxidants with improved pharmacological properties encompassing theoretical, synthetic, biochemical and in vitro/in vivo studies is covered.
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