1
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Paul S, Biswas P. Molecular Dynamics Simulation Study of the Self-Assembly of Tau-Derived PHF6 and Its Inhibition by Oleuropein Aglycone from Extra Virgin Olive Oil. J Phys Chem B 2024; 128:5630-5641. [PMID: 38814052 DOI: 10.1021/acs.jpcb.4c02393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Alzheimer's disease (AD) and other taupathies are neurodegenerative disorders associated with the amyloid deposition of the Tau protein in the brain. This amyloid formation may be inhibited by small molecules, which is recognized as one of the best therapeutic strategies to stop the progression of the disease. This work focuses on the small nucleating segment, hexapeptide-paired helical filament 6 (PHF6), responsible for Tau aggregation. Using computational modeling and classical molecular dynamics simulations, we show that PHF6 monomers collapse in water to form β-sheet rich structures, and the main olive oil polyphenol oleuropein aglycone (OleA) prevents peptide aggregation significantly. We gradually increase the ratio of the PHF6-OleA from 1:1 to 1:3 and find that for the 1:1 ratio, the peptide monomers are prone to form aggregated structures, while for the 1:2 ratio, the formation of the extended β-sheet structure is significantly less. For a 1:3 ratio of protein/OleA, the peptide residues are sufficiently crowded by OleA molecules through hydrogen bonding, hydrophobic interactions, and π-π stacking; hence, the peptide chains prefer to exist in a monomeric random coil conformation.
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Affiliation(s)
- Srijita Paul
- Department of Chemistry, University of Delhi, New Delhi 110007, India
| | - Parbati Biswas
- Department of Chemistry, University of Delhi, New Delhi 110007, India
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2
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Wang X, Wang Q, Yu J, Guo X, Tong P, Yin F, Liu X, Zhou D. The potential of hydroxytyrosol fatty acid esters to enhance oral bioavailabilities of hydroxytyrosol and fatty acids: Continuous and slow-release ability in small intestine and blood. Food Chem 2023; 422:136246. [PMID: 37126954 DOI: 10.1016/j.foodchem.2023.136246] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 05/03/2023]
Abstract
HPLC-UV analysis in rat everted gut sac and in vitro simulated digestion models indicated that hydroxytyrosol fatty acid esters (HTy-Es) could be hydrolyzed by pancreatic lipase to slow-release of free fatty acids (FAs) and HTy. Meanwhile, the HTy-Es, the liberated FAs and the HTy could cross the membrane and were transported into blood circulation. HTy-Es were further hydrolyzed by carboxylesterase in in vitro rat plasma hydrolysis model, which also showed slow-release of FAs (C1-C4) and HTy. Especially, the rates of hydrolysis and transport initially increased and then decreased with the increasing alkyl chain length. Besides, the above rates of the HTy-Es with a straight chain were greater than those of its isomer with a branched chain. Therefore, the above-mentioned continuous and slow-release of FAs and HTy in small intestine and blood clearly demonstrated that HTy-Es would be an effective approach to enhance oral bioavailabilities of free fatty acids and hydroxytyrosol.
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Affiliation(s)
- Xinmiao Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Qian Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Jinghan Yu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Xu Guo
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Peiyong Tong
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Fawen Yin
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Xiaoyang Liu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, PR China
| | - Dayong Zhou
- School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China; National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, PR China; State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, PR China
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3
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Panichi V, Bissoli I, D'Adamo S, Flamigni F, Cetrullo S, Borzì RM. NOTCH1: A Novel Player in the Molecular Crosstalk Underlying Articular Chondrocyte Protection by Oleuropein and Hydroxytyrosol. Int J Mol Sci 2023; 24:ijms24065830. [PMID: 36982904 PMCID: PMC10058228 DOI: 10.3390/ijms24065830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/03/2023] [Accepted: 03/13/2023] [Indexed: 03/30/2023] Open
Abstract
Osteoarthritis (OA) is the most common joint disease, but no effective and safe disease-modifying treatment is available. Risk factors such as age, sex, genetics, injuries and obesity can concur to the onset of the disease, variably triggering the loss of maturational arrest of chondrocytes further sustained by oxidative stress, inflammation and catabolism. Different types of nutraceuticals have been studied for their anti-oxidative and anti-inflammatory properties. Olive-derived polyphenols draw particular interest due to their ability to dampen the activation of pivotal signaling pathways in OA. Our study aims to investigate the effects of oleuropein (OE) and hydroxytyrosol (HT) in in vitro OA models and elucidate their possible effects on NOTCH1, a novel therapeutic target for OA. Chondrocytes were cultured and exposed to lipopolysaccharide (LPS). Detailed analysis was carried out about the OE/HT mitigating effects on the release of ROS (DCHF-DA), the increased gene expression of catabolic and inflammatory markers (real time RT-PCR), the release of MMP-13 (ELISA and Western blot) and the activation of underlying signaling pathways (Western blot). Our findings show that HT/OE efficiently attenuates LPS-induced effects by firstly reducing the activation of JNK and of the NOTCH1 pathway downstream. In conclusion, our study provides molecular bases supporting the dietary supplementation of olive-derived polyphenols to revert/delay the progression of OA.
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Affiliation(s)
- Veronica Panichi
- Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, Laboratorio di Patologia delle Infezioni Associate all'Impianto, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Irene Bissoli
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, 40138 Bologna, Italy
| | - Stefania D'Adamo
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, 40138 Bologna, Italy
| | - Flavio Flamigni
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, 40138 Bologna, Italy
| | - Silvia Cetrullo
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, 40138 Bologna, Italy
| | - Rosa Maria Borzì
- Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
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4
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Islam MR, Akash S, Rahman MM, Nowrin FT, Akter T, Shohag S, Rauf A, Aljohani AS, Simal-Gandara J. Colon cancer and colorectal cancer: Prevention and treatment by potential natural products. Chem Biol Interact 2022; 368:110170. [DOI: 10.1016/j.cbi.2022.110170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/24/2022] [Accepted: 09/03/2022] [Indexed: 11/29/2022]
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5
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Montes A, Merino E, Valor D, Guamán-Balcázar MC, Pereyra C, Martínez de la Ossa EJ. From olive leaves to spherical nanoparticles by one-step RESS process precipitation. Eur Food Res Technol 2022. [DOI: 10.1007/s00217-022-04127-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Metabolism and Bioavailability of Olive Bioactive Constituents Based on In Vitro, In Vivo and Human Studies. Nutrients 2022; 14:nu14183773. [PMID: 36145149 PMCID: PMC9504511 DOI: 10.3390/nu14183773] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/05/2022] [Accepted: 09/07/2022] [Indexed: 11/17/2022] Open
Abstract
Consumption of olive products has been established as a health-promoting dietary pattern due to their high content in compounds with eminent pharmacological properties and well-described bioactivities. However, their metabolism has not yet been fully described. The present critical review aimed to gather all scientific data of the past two decades regarding the absorption and metabolism of the foremost olive compounds, specifically of the phenylalcohols hydroxytyrosol (HTyr) and tyrosol (Tyr) and the secoiridoids oleacein (Olea), oleocanthal (Oleo) and oleuropein (Oleu). A meticulous record of the in vitro assays and in vivo (animals and humans) studies of the characteristic olive compounds was cited, and a critical discussion on their bioavailability and metabolism was performed taking into account data from their gut microbial metabolism. The existing critical review summarizes the existing knowledge regarding the bioavailability and metabolism of olive-characteristic phenylalchohols and secoiridoids and spotlights the lack of data for specific chemical groups and compounds. Critical observations and conclusions were derived from correlating structure with bioavailability data, while results from in vitro, animal and human studies were compared and discussed, giving significant insight to the future design of research approaches for the total bioavailability and metabolism exploration thereof.
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Rocchetti G, Luisa Callegari M, Senizza A, Giuberti G, Ruzzolini J, Romani A, Urciuoli S, Nediani C, Lucini L. Oleuropein from olive leaf extracts and extra-virgin olive oil provides distinctive phenolic profiles and modulation of microbiota in the large intestine. Food Chem 2022; 380:132187. [DOI: 10.1016/j.foodchem.2022.132187] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/14/2021] [Accepted: 01/16/2022] [Indexed: 01/06/2023]
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Finicelli M, Squillaro T, Galderisi U, Peluso G. Polyphenols, the Healthy Brand of Olive Oil: Insights and Perspectives. Nutrients 2021; 13:3831. [PMID: 34836087 PMCID: PMC8624306 DOI: 10.3390/nu13113831] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/18/2021] [Accepted: 10/25/2021] [Indexed: 12/13/2022] Open
Abstract
Given their beneficial potential on human health, plant food bioactive molecules are important components influencing nutrition. Polyphenols have been widely acknowledged for their potentially protective role against several complex diseases. In particular, the polyphenols of olive oil (OOPs) emerge as the key components of many healthy diets and have been widely studied for their beneficial properties. The qualitative and quantitative profile defining the composition of olive oil phenolic molecules as well as their absorbance and metabolism once ingested are key aspects that need to be considered to fully understand the health potential of these molecules. In this review, we provide an overview of the key aspects influencing these variations by focusing on the factors influencing the biosynthesis of OOPs and the findings about their absorption and metabolism. Despite the encouraging evidence, the health potential of OOPs is still debated due to limitations in current studies. Clinical trials are necessary to fully understand and validate the beneficial effects of olive oil and OOPs on human health. We provide an update of the clinical trials based on olive oil and/or OOPs that aim to understand their beneficial effects. Tailored studies are needed to standardize the polyphenolic distribution and understand the variables associated with phenol-enriched OO. An in-depth knowledge of the steps that occur following polyphenol ingestion may reveal useful insights to be used in clinical settings for the prevention and treatment of many diseases.
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Affiliation(s)
- Mauro Finicelli
- Research Institute on Terrestrial Ecosystems (IRET), National Research Council of Italy (CNR), Via Pietro Castellino 111, 80131 Naples, Italy
| | - Tiziana Squillaro
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Via Santa Maria di Costantinopoli 16, 80138 Naples, Italy; (T.S.); (U.G.)
| | - Umberto Galderisi
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, Via Santa Maria di Costantinopoli 16, 80138 Naples, Italy; (T.S.); (U.G.)
| | - Gianfranco Peluso
- Research Institute on Terrestrial Ecosystems (IRET), National Research Council of Italy (CNR), Via Pietro Castellino 111, 80131 Naples, Italy
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9
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Alnusaire TS. Olive Leaves (Olea europaea L) Extract Loaded Lipid Nanoparticles: Optimization of Processing Parameters by Box-Behnken Statistical Design, in-vitro Characterization, and Evaluation of Anti-oxidant and Anti-microbial Activity. J Oleo Sci 2021; 70:1403-1416. [PMID: 34615828 DOI: 10.5650/jos.ess21149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The present study was aimed to prepare and evaluated solid lipid nanoparticles (SLNs) of olive leaves extract powder (OLP) which contained many anti-oxidant and antimicrobial agents like oleuropein, a natural polyphenol. The major issue concern OLP was the instability due to environmental conditions and hence compromised bioactivity. To overcome this problem, SLNs were designed by hot homogenous followed by sonication technique to protect the drug and improve its antioxidant and antimicrobial activity. Lipids like compritol 888ATO and surfactant like tween 80 were used for the development and stabilization of SLNS and optimization was done by Box-Behnken statistical design (3x3). The optimized batch (F9) showed particle size, entrapment efficiency, PDI, and zeta potential 277.46 nm, 80.48%, 0.275, and -23.18 mV respectively. Optimized formulation (F9) exhibited a sustained release pattern up to 24 h with first-order release kinetic (R2 = 0.9984) and the mechanism of drug release was found to be Fickian diffusion type (n = 0.441). Upon the stability study, it could be found that SLNs formulation was stable. Anti-oxidation and anti-microbial studies were conducted on optimized formulation and findings suggested that SLNs showed an improved radical scavenging activity and anti-microbial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacteria. Finally, it was concluded that developed SLNs were able to protect and suitable for the delivery of OLP.
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Affiliation(s)
- Taghreed S Alnusaire
- Biology Department, College of Science, Jouf University.,Olive Research Center, Jouf University
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10
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Bucciantini M, Leri M, Nardiello P, Casamenti F, Stefani M. Olive Polyphenols: Antioxidant and Anti-Inflammatory Properties. Antioxidants (Basel) 2021; 10:antiox10071044. [PMID: 34209636 PMCID: PMC8300823 DOI: 10.3390/antiox10071044] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 12/14/2022] Open
Abstract
Oxidative stress and inflammation triggered by increased oxidative stress are the cause of many chronic diseases. The lack of anti-inflammatory drugs without side-effects has stimulated the search for new active substances. Plant-derived compounds provide new potential anti-inflammatory and antioxidant molecules. Natural products are structurally optimized by evolution to serve particular biological functions, including the regulation of endogenous defense mechanisms and interaction with other organisms. This property explains their relevance for infectious diseases and cancer. Recently, among the various natural substances, polyphenols from extra virgin olive oil (EVOO), an important element of the Mediterranean diet, have aroused growing interest. Extensive studies have shown the potent therapeutic effects of these bioactive molecules against a series of chronic diseases, such as cardiovascular diseases, diabetes, neurodegenerative disorders and cancer. This review begins from the chemical structure, abundance and bioavailability of the main EVOO polyphenols to highlight the effects and the possible molecular mechanism(s) of action of these compounds against inflammation and oxidation, in vitro and in vivo. In addition, the mechanisms of inhibition of molecular signaling pathways activated by oxidative stress by EVOO polyphenols are discussed, together with their possible roles in inflammation-mediated chronic disorders, also taking into account meta-analysis of population studies and clinical trials.
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Affiliation(s)
- Monica Bucciantini
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence 50134, Italy; (M.L.); (M.S.)
- Correspondence:
| | - Manuela Leri
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence 50134, Italy; (M.L.); (M.S.)
| | - Pamela Nardiello
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence 50134, Italy; (P.N.); (F.C.)
| | - Fiorella Casamenti
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence 50134, Italy; (P.N.); (F.C.)
| | - Massimo Stefani
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence 50134, Italy; (M.L.); (M.S.)
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11
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Cohen L, Livney YD, Assaraf YG. Targeted nanomedicine modalities for prostate cancer treatment. Drug Resist Updat 2021; 56:100762. [PMID: 33857756 DOI: 10.1016/j.drup.2021.100762] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 12/17/2022]
Abstract
Prostate cancer (PC) is the second most common cause of death amongst men in the USA. Therapy of PC has been transformed in the past decade by introducing novel therapeutics, advanced functional imaging and diagnostic approaches, next generation sequencing, as well as improved application of existing therapies in localized PC. Treatment of PC at the different stages of the disease may include surgery, androgen deprivation therapy (ADT), chemotherapy and radiation therapy. However, although ADT has proven efficacious in PC treatment, its effectiveness may be temporary, as these tumors frequently develop molecular mechanisms of therapy resistance, which allow them to survive and proliferate even under conditions of testosterone deprivation, inhibition of androgen receptor signaling, or cytotoxic drug treatment. Importantly, ADT was found to induce key alterations which frequently result in the formation of metastatic tumors displaying a therapy refractory phenotype. Hence, to overcome these serious therapeutic impediments, novel PC cell-targeted therapeutic strategies are being developed. These include diverse platforms enabling specific enhanced antitumor drug uptake and increased intracellular accumulation. Studies have shown that these novel treatment modalities lead to enhanced antitumor activity and diminished systemic toxicity due to the use of selective targeting and decreased drug doses. The underlying mechanism of targeting and internalization is based upon the interaction between a selective ligand, conjugated to a drug-loaded nanoparticle or directly to an anti-cancer drug, and a specific plasma membrane biomarker, uniquely overexpressed on the surface of PC cells. Another targeted therapeutic approach is the delivery of unique anti-oncogenic signaling pathway-based therapeutic drugs, which are selectively cytotoxic to PC cells. The current paper reviews PC targeted modalities reported in the past 6 years, and discusses both the advantages and limitations of the various targeted treatment strategies.
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Affiliation(s)
- Lital Cohen
- The Laboratory of Biopolymers for Food and Health, Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Yoav D Livney
- The Laboratory of Biopolymers for Food and Health, Department of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel.
| | - Yehuda G Assaraf
- The Fred Wyszkowski Cancer Research Laboratory, Department of Biology, Technion - Israel Institute of Technology, Haifa, 3200003, Israel.
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12
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Ramírez-Expósito MJ, Carrera-González MP, Mayas MD, Martínez-Martos JM. Gender differences in the antioxidant response of oral administration of hydroxytyrosol and oleuropein against N-ethyl-N-nitrosourea (ENU)-induced glioma. Food Res Int 2020; 140:110023. [PMID: 33648253 DOI: 10.1016/j.foodres.2020.110023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 12/18/2022]
Abstract
Brain tumorigenesis has been associated not only with oxidative stress, but also with a reduced response of non-enzyme and enzyme antioxidant defense systems. In fact, the imbalance between free-radical production and the efficiency of the antioxidant defense systems triggers the process because the central nervous system (CNS) is very sensitive to free-radical damage. Phenolic compounds, mainly oleuropein and its major metabolite hydroxytyrosol, derived from olives and virgin olive oil, have been shown to exert important anticancer activities both in vitro and in vivo due to their antioxidant properties. The present study analyzes the effects of the oral administration of oleuropein, hydroxytyrosol and the mixture of both phenolic compounds in rats with transplacental N-ethyl-N-nitrosourea (ENU)-induced brain tumors to analyze their potential effect against brain tumorigenesis through the modification of redox system components. Oxidative stress parameters, non-enzyme and enzyme antioxidant defense systems and blood chemistry were assayed in the different experimental groups. The treatment with oleuropein, hydroxytyrosol and/or the mixture of both phenolic compounds promotes a limited beneficial effect as anticancer compounds in our ENU-induced animal model of brain tumor. These effects occur via redox control mechanisms involving endogenous enzymatic and non-enzymatic antioxidant defense systems, and are highly dependent on the gender of the animals.
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Affiliation(s)
- M J Ramírez-Expósito
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain
| | - M P Carrera-González
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain
| | - M D Mayas
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain
| | - J M Martínez-Martos
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain.
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13
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Parisio C, Lucarini E, Micheli L, Toti A, Bellumori M, Cecchi L, Calosi L, Bani D, Di Cesare Mannelli L, Mulinacci N, Ghelardini C. Extra virgin olive oil and related by-products (Olea europaea L.) as natural sources of phenolic compounds for abdominal pain relief in gastrointestinal disorders in rats. Food Funct 2020; 11:10423-10435. [PMID: 33237043 DOI: 10.1039/d0fo02293d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Management of abdominal pain, a common symptom of IBDs and IBS, is still a clinical problem. Extra virgin olive oil (EVOO), a main component of the Mediterranean diet, shows positive effects on chronic inflammation in IBDs. In this study, the effect of the oral administration of EVOO (3 mL) and two olive milling by-products, DPA (300 mg kg-1) and DRF (300 mg kg-1), on preventing the development of abdominal pain in a DNBS-induced colitis model in rats was evaluated. The doses were chosen with the aim of simulating a plausible daily intake in humans. DPA and EVOO treatments significantly reduced the abdominal viscero-motor response to colon-rectal distension at 2 and 3 mL of balloon distension volume, both 7 and 14 days after the DNBS-injection. DRF showed efficacy in the reduction of visceral hypersensitivity only with 3 mL balloon inflation. In awake animals, DPA and DRF reduced pain perception (evaluated as abdominal withdrawal reflex) with all balloon distension volumes, while EVOO was effective only with higher distension volumes. Fourteen days after the DNBS-injection, all samples reduced the macroscopic intestinal damage (quantified as the macroscopic damage score) also showing, at the microscopic level, a reduction of the inflammatory infiltrate (quantified by hematoxylin and eosin analysis), fibrosis (highlighted by picrosirius red staining), the increase in mast cells and their degranulation (analyzed by triptase immunohistochemistry). This is the first report on the promotion of abdominal pain relief in a rat model obtained administering EVOO and two derived by-products. Our results suggest a protective role of phenol-rich EVOO and milling by-products, which may be proposed as food ingredients for novel functional foods.
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Affiliation(s)
- Carmen Parisio
- Department of Neuroscience, Psychology, Drug Research and Child Health - NEUROFARBA - Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy.
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14
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Leto G, Flandina C, Crescimanno M, Giammanco M, Sepporta MV. Effects of oleuropein on tumor cell growth and bone remodelling: Potential clinical implications for the prevention and treatment of malignant bone diseases. Life Sci 2020; 264:118694. [PMID: 33130080 DOI: 10.1016/j.lfs.2020.118694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/19/2020] [Accepted: 10/27/2020] [Indexed: 12/12/2022]
Abstract
Oleuropein (Ole) is the main bioactive phenolic compound present in olive leaves, fruits and olive oil. This molecule has been shown to exert beneficial effects on several human pathological conditions. In particular, recent preclinical and observational studies have provided evidence that Ole exhibits chemo-preventive effects on different types of human tumors. Studies undertaken to elucidate the specific mechanisms underlying these effects have shown that this molecule may thwart several key steps of malignant progression, including tumor cell proliferation, survival, angiogenesis, invasion and metastasis, by modulating the expression and activity of several growth factors, cytokines, adhesion molecules and enzymes involved in these processes. Interestingly, experimental observations have highlighted the fact that most of these signalling molecules also appear to be actively involved in the homing and growth of disseminating cancer cells in bones and, ultimately, in the development of metastatic bone diseases. These findings, and the experimental and clinical data reporting the preventive activity of Ole on various pathological conditions associated with a bone loss, are indicative of a potential therapeutic role of this molecule in the prevention and treatment of cancer-related bone diseases. This paper provides a current overview regarding the molecular mechanisms and the experimental findings underpinning a possible clinical role of Ole in the prevention and development of cancer-related bone diseases.
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Affiliation(s)
- Gaetano Leto
- Laboratory of Experimental Pharmacology, Department of Health Sciences, University of Palermo, 90127 Palermo, Italy.
| | - Carla Flandina
- Laboratory of Experimental Pharmacology, Department of Health Sciences, University of Palermo, 90127 Palermo, Italy
| | - Marilena Crescimanno
- Laboratory of Experimental Pharmacology, Department of Health Sciences, University of Palermo, 90127 Palermo, Italy
| | - Marco Giammanco
- Department of Surgical, Oncological and Oral Sciences, University of Palermo, 90127 Palermo, Italy
| | - Maria Vittoria Sepporta
- Pediatric Unit, Department Women-Mother-Children, Pediatric Hematology-Oncology Research Laboratory, Lausanne University Hospital, Lausanne, Switzerland
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15
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Liposomal Encapsulation of Oleuropein and an Olive Leaf Extract: Molecular Interactions, Antioxidant Effects and Applications in Model Food Systems. FOOD BIOPHYS 2020. [DOI: 10.1007/s11483-020-09650-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractThe influence of actively/passively encapsulated oleuropein on DPPC liposomes thermal and structural properties, and its antioxidant capacity against lipid peroxidation were investigated. Also, an oleuropein-rich olive leaf extract was encapsulated in soy phosphatidylcholine (PL-90 g) and incorporated in model and commercial drinks. Oleuropein induced a concentration-dependent broadening and splitting of the gel-to-liquid phase transition temperature. Fluorescence measurements revealed a fluidizing effect on liposomes below their gel-to-liquid phase transition temperature, and a higher lipid ordering above, especially to active encapsulation. Oleuropein also showed an antioxidant effect against lipid peroxidation in PL-90 g liposomes. PL-90 g Liposomes with olive leaf extract showed a mean diameter of 405 ± 4 nm and oleuropein encapsulation efficiency of 34% and delayed oleuropein degradation at pH 2.0 and 2.8 model drinks. In conclusion, greater effects were observed on the structure and fluidity of DPPC liposomes when oleuropein was actively encapsulated, while its incorporation into acidic foods in encapsulated form could enhance its stability.
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Rocchetti G, Alcántara C, Bäuerl C, García-Pérez JV, Lorenzo JM, Lucini L, Collado MC, Barba FJ. Bacterial growth and biological properties of Cymbopogon schoenanthus and Ziziphus lotus are modulated by extraction conditions. Food Res Int 2020; 136:109534. [PMID: 32846595 DOI: 10.1016/j.foodres.2020.109534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/05/2020] [Accepted: 07/08/2020] [Indexed: 10/23/2022]
Abstract
The present study aims to evaluate the antibacterial activity and biological properties of two traditional Saharian plants (Cymbopogon schoenanthus and Ziziphus lotus). The plant extracts were obtained by using a different combination of extraction methods (conventional vs. ultrasound-assisted) and solvents (water vs. ethanol:water (50:50, v/v)). The antioxidant profile, anti-inflammatory activity and impact on bacterial growth (foodborne and probiotic bacteria) of the obtained extracts were assessed. The plant species showed the hierarchically more important role in determining the biological properties of the extracts, followed by extraction solvent and extraction conditions. Conventional Z. lotus hydroethanolic extracts showed the highest total phenolic content (20.4 mg GAE/g), while Z. lotus ethanol extracts from ultrasound-assisted process presented the highest content of carotenoids (0.15 mg/g). In addition, ultrasound-assisted Z. lotus hydroethanolic extracts presented the highest in vitro radical scavenging activity, being 7.93 mmol Trolox/g. Multivariate analysis statistics (PCA) showed that both the extraction methodology and the solvent used strongly affected the bacterial growth. Z. lotus mainly decreased the growth rate of S. aureus and L. innocua. Interestingly, the aqueous extracts of this plant as well as those from C. schoenanthus, obtained by conventional extraction, significantly increased the growth rate and the maximal optical density of L. casei. Aqueous extracts of both Z. lotus and C. schoenanthus slightly influenced the growth of Bifidobacterium. Overall, the extracts of these plants showed selective activities with respect to pathogens and probiotic bacteria and may provide an advantage both in terms of antimicrobial and prebiotic activity.
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Affiliation(s)
- Gabriele Rocchetti
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy
| | - Cristina Alcántara
- Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Department of Biotechnology, Av. Agustin Escardino 7, Valencia, Spain
| | - Christine Bäuerl
- Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Department of Biotechnology, Av. Agustin Escardino 7, Valencia, Spain
| | - Jose V García-Pérez
- Grupo de Análisis y Simulación de Procesos Agroalimentarios (ASPA), Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Valencia 46022, Spain
| | - José M Lorenzo
- Centro Tecnológico de la Carne de Galicia, Avda. Galicia n° 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain; Área de Tecnología de los Alimentos, Facultad de Ciencias de Ourense, Universidad de Vigo, 32004 Ourense, Spain.
| | - Luigi Lucini
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy
| | - María Carmen Collado
- Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Department of Biotechnology, Av. Agustin Escardino 7, Valencia, Spain.
| | - Francisco J Barba
- Nutrition and Food Science Area, Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine Department, Faculty of Pharmacy, Universitat de València, Avda. Vicent Andrés Estellés, s/n 46100, Burjassot, València, Spain.
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17
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Tang HY, Fang Z, Ng K. Dietary fiber-based colon-targeted delivery systems for polyphenols. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.04.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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18
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Huguet-Casquero A, Moreno-Sastre M, López-Méndez TB, Gainza E, Pedraz JL. Encapsulation of Oleuropein in Nanostructured Lipid Carriers: Biocompatibility and Antioxidant Efficacy in Lung Epithelial Cells. Pharmaceutics 2020; 12:pharmaceutics12050429. [PMID: 32384817 PMCID: PMC7285197 DOI: 10.3390/pharmaceutics12050429] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/27/2020] [Accepted: 05/05/2020] [Indexed: 12/13/2022] Open
Abstract
Oxidative damage has been linked to a number of diseases. Oleuropein (OLE), a natural occurring polyphenol from olive leaves (Olea europaea L.), is known to be a potent antioxidant compound with inherent instability and compromised bioavailability. Therefore, in this work, nanostructured lipid carriers (NLCs) were proposed for OLE encapsulation to protect and improve its antioxidant efficacy. The lipid matrix, composed of olive oil and Precirol, was optimized prior to OLE encapsulation. The characterization of the optimized oleuropein-loaded NLCs (NLC-OLE) showed a mean size of 150 nm, a zeta potential of −21 mV, an encapsulation efficiency of 99.12%, sustained release profile, and improved radical scavenging activity. The cellular in vitro assays demonstrated the biocompatibility of the NLCs, which were found to improve and maintain OLE antioxidant efficacy in the A549 and CuFi-1 lung epithelial cell lines, respectively. Overall, these findings suggest a promising potential of NLC-OLE to further design a pulmonary formulation for OLE delivery in lung epithelia.
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Affiliation(s)
- Amaia Huguet-Casquero
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country (UPV/EHU), School of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.H.-C.); (M.M.-S.); (T.B.L.-M.)
- Biosasun S.A., Iturralde 10, Etxabarri-Ibiña, 01006 Zigoitia, Spain;
| | - Maria Moreno-Sastre
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country (UPV/EHU), School of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.H.-C.); (M.M.-S.); (T.B.L.-M.)
| | - Tania Belén López-Méndez
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country (UPV/EHU), School of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.H.-C.); (M.M.-S.); (T.B.L.-M.)
| | - Eusebio Gainza
- Biosasun S.A., Iturralde 10, Etxabarri-Ibiña, 01006 Zigoitia, Spain;
| | - Jose Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country (UPV/EHU), School of Pharmacy, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.H.-C.); (M.M.-S.); (T.B.L.-M.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 01006 Vitoria-Gasteiz, Spain
- Correspondence:
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Rocchetti G, Senizza B, Giuberti G, Montesano D, Trevisan M, Lucini L. Metabolomic Study to Evaluate the Transformations of Extra-Virgin Olive Oil's Antioxidant Phytochemicals During In Vitro Gastrointestinal Digestion. Antioxidants (Basel) 2020; 9:antiox9040302. [PMID: 32268618 PMCID: PMC7222208 DOI: 10.3390/antiox9040302] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 03/30/2020] [Accepted: 04/05/2020] [Indexed: 12/20/2022] Open
Abstract
In this work, different commercial extra-virgin olive oils (EVOO) were subjected to in vitro gastrointestinal digestion and the changes in bioactive compounds were evaluated by ultra-high-pressure liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry, using untargeted metabolomics. As expected, raw EVOO samples were abundant in total sterols (on average: 3007.4 mg equivalents/kg) and tyrosol equivalents (on average: 334.1 mg equivalents/kg). However, the UHPLC-QTOF screening allowed us to annotate 310 compounds, with a large abundance of sterols (219 compounds), followed by polyphenols (67 compounds) and terpenoids. The in vitro gastrointestinal digestion was found to affect the phytochemical composition of the different EVOO samples. In particular, both unsupervised and supervised statistics depicted the modifications of the bioactive profile following gastric and pancreatic phases. Overall, the compounds which resulted as the most affected by the in vitro digestion were flavonoids (cyanidin and luteolin equivalents), whilst relatively high % bioaccessibility values were recorded for tyrosol equivalents during the pancreatic phase (on average, 66%). In this regard, oleuropein-aglycone (i.e., the major phenolic compound in EVOO) was converted to hydroxytyrosol, moving from an average value of 1.3 (prior to the in vitro digestion) up to 9.7 mg equivalents/kg during the pancreatic step. As proposed in the literature, the increase in hydroxytyrosol might be the result of the combined effect of lipase(s) activity and acidic conditions. Taken together, the present findings corroborate the suitability of untargeted metabolomics coupled to in vitro digestion methods to investigate the bioaccessibility of phenolic compounds. In this regard, a significant impact of in vitro gastrointestinal digestion on polyphenolic profiles has been detected, thus suggesting the need to account for actual bioaccessibility values rather than just considering the amounts in the raw commodity.
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Affiliation(s)
- Gabriele Rocchetti
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (B.S.); (G.G.); (M.T.); (L.L.)
- Correspondence:
| | - Biancamaria Senizza
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (B.S.); (G.G.); (M.T.); (L.L.)
| | - Gianluca Giuberti
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (B.S.); (G.G.); (M.T.); (L.L.)
| | - Domenico Montesano
- Department of Pharmaceutical Sciences, Section of Food Science and Nutrition, University of Perugia, via San Costanzo, 06126 Perugia, Italy;
| | - Marco Trevisan
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (B.S.); (G.G.); (M.T.); (L.L.)
| | - Luigi Lucini
- Department for Sustainable Food Process, Università Cattolica del Sacro Cuore, Via Emilia Parmense 84, 29122 Piacenza, Italy; (B.S.); (G.G.); (M.T.); (L.L.)
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Role of maltodextrin and inulin as encapsulating agents on the protection of oleuropein during in vitro gastrointestinal digestion. Food Chem 2020; 310:125976. [DOI: 10.1016/j.foodchem.2019.125976] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 11/02/2019] [Accepted: 11/28/2019] [Indexed: 12/18/2022]
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Seasonal Variations in the Chemical Composition of Liangshan Olive Leaves and Their Antioxidant and Anticancer Activities. Foods 2019; 8:foods8120657. [PMID: 31817958 PMCID: PMC6963812 DOI: 10.3390/foods8120657] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/26/2019] [Accepted: 12/06/2019] [Indexed: 01/31/2023] Open
Abstract
The seasonal changes in the chemical composition of Olea europaea leaves from January to December at Liangshan (China) have been investigated. The highest total phenolic content (TPC), total flavonoid content (TFC), and free amino acid content (FAAC) levels were found in May and December, while the lowest levels were detected in April and September. The soluble protein content (SPC) and the soluble sugar content (SSC) were highest in spring but lowest in summer and winter. The levels of major phenolic compounds, including oleuropein, and luteolin-4’-O-glucoside, followed by apigenin-7-O-glucoside, quercetin, rutin, luteolin, and apigenin, increased during spring and winter but decreased during summer and autumn. In addition, phenolic extracts (PEs) showed dose-dependent antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and superoxide radical scavenging activity assays; the reducing power was tested. The anticancer activities of PE at various concentrations were assessed by a cell counting kit-8 (CCK-8), and the IC50 (50% effective concentration) to HEK293, HeLa, and S180 cells were 841.48, 7139, and 457.69 μg/mL, respectively. PE-treated S180 cells inhibited proliferation through activation of caspase-3/9 and disruption of the mitochondrial membrane potential. Thus, PE in Liangshan olive leaves possessed strong antioxidant and anticancer potential, and spring and winter were determined as optimal harvesting seasons.
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22
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Protective Effects Induced by Two Polyphenolic Liquid Complexes from Olive ( Olea europaea, mainly Cultivar Coratina) Pressing Juice in Rat Isolated Tissues Challenged with LPS. Molecules 2019; 24:molecules24163002. [PMID: 31430921 PMCID: PMC6720671 DOI: 10.3390/molecules24163002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 12/21/2022] Open
Abstract
MOMAST(®) HY100 and MOMAST(®) HP30 are polyphenolic liquid complexes from olive pressing juice with a total polyphenolic content of 100 g/kg (at least 50% as hydroxytyrosol) and 36 g/kg (at least 30% as hydroxytyrosol), respectively. We investigated the potential protective role of MOMAST(®) HY100 and MOMAST(®) HP30 on isolated rat colon, liver, heart, and prefrontal cortex specimens treated with Escherichia coli lipopolysaccharide (LPS), a validated ex vivo model of inflammation, by measuring the production of prostaglandin (PG)E2, 8-iso-PGF2α, lactate dehydrogenase (LDH), as well as cyclooxygenase (COX)-2, tumor necrosis factor α (TNFα), and inducible nitric oxide synthase (iNOS) mRNA levels. MOMAST(®) HY100 decreased LPS-stimulated PGE2 and LDH levels in all tested tissues. Following treatment with MOMAST(®) HY100, we found a significant reduction in iNOS levels in prefrontal cortex and heart specimens, COX-2 and TNFα mRNA levels in heart specimens, and 8-iso-PGF2α levels in liver specimens. On the other hand, MOMAST(®) HP30 was found to blunt COX-2, TNFα, and iNOS mRNA levels, as well as 8-iso-PGF2α in cortex, liver, and colon specimens. MOMAST(®) HP30 was also found to decrease PGE2 levels in liver specimens, while it decreased iNOS mRNA, LDH, and 8-iso-PGF2α levels in heart specimens. Both MOMAST(®) HY100 and MOMAST(®) HP30 exhibited protective effects on multiple inflammatory and oxidative stress pathways.
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24
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Karković Marković A, Torić J, Barbarić M, Jakobušić Brala C. Hydroxytyrosol, Tyrosol and Derivatives and Their Potential Effects on Human Health. Molecules 2019; 24:molecules24102001. [PMID: 31137753 PMCID: PMC6571782 DOI: 10.3390/molecules24102001] [Citation(s) in RCA: 264] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/17/2019] [Accepted: 05/24/2019] [Indexed: 12/14/2022] Open
Abstract
The Mediterranean diet and olive oil as its quintessential part are almost synonymous with a healthy way of eating and living nowadays. This kind of diet has been highly appreciated and is widely recognized for being associated with many favorable effects, such as reduced incidence of different chronic diseases and prolonged longevity. Although olive oil polyphenols present a minor fraction in the composition of olive oil, they seem to be of great importance when it comes to the health benefits, and interest in their biological and potential therapeutic effects is huge. There is a growing body of in vitro and in vivo studies, as well as intervention-based clinical trials, revealing new aspects of already known and many new, previously unknown activities and health effects of these compounds. This review summarizes recent findings regarding biological activities, metabolism and bioavailability of the major olive oil phenolic compounds—hydroxytyrosol, tyrosol, oleuropein, oleocanthal and oleacein—the most important being their antiatherogenic, cardioprotective, anticancer, neuroprotective and endocrine effects. The evidence presented in the review concludes that these phenolic compounds have great pharmacological potential, however, further studies are still required.
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Affiliation(s)
- Ana Karković Marković
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A.Kovačića 1, 10 000 Zagreb, Croatia.
| | - Jelena Torić
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A.Kovačića 1, 10 000 Zagreb, Croatia.
| | - Monika Barbarić
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A.Kovačića 1, 10 000 Zagreb, Croatia.
| | - Cvijeta Jakobušić Brala
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A.Kovačića 1, 10 000 Zagreb, Croatia.
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Abstract
Olive trees (Olea europaea) and their processed products, such as olive oil, play a major role in the Mediterranean way of life. Their positive impact on human health is being intensely investigated. One research topic is the identification of new application areas of olive mill wastewater (OMWW). OMWW is characterized by the high content of polyphenols possessing many positive health effects. Thus, the phenol-enriched OMWW extract offers the potential for the treatment of skin disorders and for cosmetic application. The aim of the present study was to evaluate cell viability and proliferation, the anti-inflammatory and anti-oxidative properties of a phenol-enriched OMWW extract on an immortal keratinocyte cell line (HaCaT cells). Moreover, the influence on the growth of various microorganisms was investigated; furthermore, the effects on normal human epidermal keratinocytes (NHEK) and human melanoma cells (A375) were studied in a commercially available tumor invasion skin model. The phenol-enriched OMWW extract showed excellent antimicrobial activity. Moreover, a noticeable reduction in reactive oxygen species formation as well as Interleukin-8 release in HaCaT cells were observed. Finally, the inhibited growth of A375 melanoma nodules in the melanoma skin model could be shown. Our results indicate that the OMWW extract is a promising ingredient for dermal applications to improve skin health and skin protection as well as having a positive impact on skin ageing.
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Evolution of the phenolic compounds profile of olive leaf extract encapsulated by spray-drying during in vitro gastrointestinal digestion. Food Chem 2019; 279:40-48. [DOI: 10.1016/j.foodchem.2018.11.127] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/30/2018] [Accepted: 11/22/2018] [Indexed: 12/15/2022]
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Surface functionalized folate targeted oleuropein nano-liposomes for prostate tumor targeting: Invitro and invivo activity. Life Sci 2019; 220:136-146. [PMID: 30710640 DOI: 10.1016/j.lfs.2019.01.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 01/26/2019] [Accepted: 01/29/2019] [Indexed: 12/13/2022]
Abstract
AIMS This study aims to develop and evaluate oleuropein loaded surface functionalized folate-targeted - PEG liposomes for the effective management of prostate cancer in an animal model. MATERIALS AND METHODS Film hydration-cum-extrusion technique was used to produce liposomes. Particle size, entrapment efficiency, drug loading, electron microscopy, and drug release study were performed for the characterization. Cell viability and various in vitro studies (phosphatidylserine internalization, TUNEL assay, measurement of mitochondrial membrane potential and caspase-3 assay) were performed to compare the anticancer and apoptotic effects of developed liposomes against the plain oleuropein. Comparative pharmacokinetic profiling and anticancer efficacy studies including a change in tumor volume, body weight, and survival analysis were performed in mice model. KEY FINDINGS The developed liposomes (OL-FML) showed the particle size of 184.2 ± 9.16 nm, the zeta potential of 1.41 ± 0.24 mV, entrapment efficiency of 63.52 ± 4.15% and drug loading of 21.31 ± 2.37%. OL-FML showed higher in vitro anti-proliferative effect and apoptosis on 22Rv1 cells. In vivo pharmacokinetic study revealed a nearly 6 fold increase in the bioavailability of OL-FML (AUC0→∞ = 641.78 ± 103.764 μg/mL·hr) as compared to OL solution (AUC0→∞ = 104.11 ± 18.374 μg/mL·hr) in mice. Increased tumor suppression, weight loss resistance, and survival probability were observed in 22Rv1 induced tumor-bearing mice with OL-FML treatment as compared to OL. SIGNIFICANCE The study provides conclusive evidence for the utilization of combining passive and active targeting strategy to enhance the anticancer effect of OL.
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Olive Leaves Extract from Algerian Oleaster ( Olea europaea var. sylvestris) on Microbiological Safety and Shelf-life Stability of Raw Halal Minced Beef during Display. Foods 2018; 8:foods8010010. [PMID: 30587798 PMCID: PMC6352275 DOI: 10.3390/foods8010010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 12/18/2018] [Accepted: 12/21/2018] [Indexed: 11/17/2022] Open
Abstract
Oleaster (wild olive tree) by-products represent a renewable and low-cost source of biopolyphenols. Leaf extracts (sylv.OLE) of Algerian oleaster, locally called a'hachad (Olea europaea subsp. europaea var. sylvestris), were applied at 1 and 5% (v/w) to raw Halal minced beef (HMB) in order to test its safety and shelf-life prolongation during retail/display. The total phenolic compound content in the extract was 198.7 ± 3.6 mg gallic acid equivalent. Ten compounds were identified in the sylv.OLE by High Performance Liquid Chromatography/Diode Array Detector (HPLC/DAD), of which oleuropein was the most abundant (43.25%). Samples treated with 5% sylv.OLE had significantly higher antimicrobial and antioxidant effects than those treated with 1% extract (p < 0.05). The addition of sylv.OLE reduced psychrotrophic counts as well as the level of pathogens (Salmonella enterica ser. Enteritidis and Shiga toxin-producing Escherichia coli O157:H7). A thiobarbituric acid reactive substance (TBARS) value of 2.42 ± 0.11 was reached throughout six days of retail/display in control samples, while the addition of 5% sylv.OLE reduced TBARS value by 58% (p < 0.05). The presence of sylv.OLE at the tested concentrations did not negatively influence the overall acceptability and bitterness of HMB.
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Oleuropein, the Main Polyphenol of Olea europaea Leaf Extract, Has an Anti-Cancer Effect on Human BRAF Melanoma Cells and Potentiates the Cytotoxicity of Current Chemotherapies. Nutrients 2018; 10:nu10121950. [PMID: 30544808 PMCID: PMC6316801 DOI: 10.3390/nu10121950] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 11/30/2018] [Accepted: 12/05/2018] [Indexed: 12/25/2022] Open
Abstract
Oleuropein (Ole), a secoiridoid glucoside present in Olea europaea leaves, gained scientific interest thanks to its several biological properties, including the anticancer one. We verified whether Ole might potentiate the cytotoxicity of conventional drugs used to treat melanoma, disclosing a potentially new therapeutic strategy. We tested the cytotoxic action of Ole alone or in combination with chemotherapeutics on A375 human melanoma cells. We found that Ole was able, at a dose of 500 µM, to stimulate apoptosis, while at a non-toxic dose of 250 µM, it affected cell proliferation and induced the downregulation of the pAKT/pS6 pathway. A dose of 250 µM Ole did not potentiate the effect of Vemurafenib (PLX4032), but it succeeded in increasing the cytotoxic effect of Dacarbazine (DTIC). The major effect was found in the association between Ole and Everolimus (RAD001), also on PLX4032-resistant BRAF melanoma cells, which possibly cooperate in the inhibition of the pAKT/pS6 pathway. Of interest, an olive leaf extract enriched in equimolar Ole was more effective and able to further improve DTIC and RAD001 efficacy on BRAF melanoma cells with respect to Ole alone. Therefore, Ole represents a natural product able to potentiate a wide array of chemotherapeutics against BRAF melanoma cells affecting the pAKT/pS6 pathway.
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30
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Goldsmith CD, Bond DR, Jankowski H, Weidenhofer J, Stathopoulos CE, Roach PD, Scarlett CJ. The Olive Biophenols Oleuropein and Hydroxytyrosol Selectively Reduce Proliferation, Influence the Cell Cycle, and Induce Apoptosis in Pancreatic Cancer Cells. Int J Mol Sci 2018; 19:ijms19071937. [PMID: 30004416 PMCID: PMC6073890 DOI: 10.3390/ijms19071937] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/17/2018] [Accepted: 06/21/2018] [Indexed: 12/28/2022] Open
Abstract
Current chemotherapy drugs for pancreatic cancer only offer an increase in survival of up to six months. Additionally, they are highly toxic to normal tissues, drastically affecting the quality of life of patients. Therefore, the search for novel agents, which induce apoptosis in cancer cells while displaying limited toxicity towards normal cells, is paramount. The olive biophenols, oleuropein, hydroxytyrosol and tyrosol, have displayed cytotoxicity towards cancer cells without affecting non-tumorigenic cells in cancers of the breast and prostate. However, their activity in pancreatic cancer has not been investigated. Therefore, the aim of this study was to determine the anti-pancreatic cancer potential of oleuropein, hydroxytyrosol and tyrosol. Pancreatic cancer cells (MIA PaCa-2, BxPC-3, and CFPAC-1) and non-tumorigenic pancreas cells (HPDE) were treated with oleuropein, hydroxytyrosol and tyrosol to determine their effect on cell viability. Oleuropein displayed selective toxicity towards MIA PaCa-2 cells and hydroxytyrosol towards MIA PaCa-2 and HPDE cells. Subsequent analysis of Bcl-2 family proteins and caspase 3/7 activation determined that oleuropein and hydroxytyrosol induced apoptosis in MIA PaCa-2 cells, while oleuropein displayed a protective effect on HPDE cells. Gene expression analysis revealed putative mechanisms of action, which suggested that c-Jun and c-Fos are involved in oleuropein and hydroxytyrosol induced apoptosis of MIA PaCa-2 cells.
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Affiliation(s)
- Chloe D Goldsmith
- Pancreatic Cancer Research Group, School of Environmental & Life Sciences, University of Newcastle, Ourimbah 2258, NSW, Australia.
- Faculty of Science, The University of Newcastle, Ourimbah 2258, NSW, Australia.
| | - Danielle R Bond
- Pancreatic Cancer Research Group, School of Environmental & Life Sciences, University of Newcastle, Ourimbah 2258, NSW, Australia.
- Faculty of Health, The University of Newcastle, Ourimbah 2258, NSW, Australia.
- Hunter Medical Research Institute (HMRI), New Lambton Heights 2305, NSW, Australia.
| | - Helen Jankowski
- Faculty of Health, The University of Newcastle, Ourimbah 2258, NSW, Australia.
- Hunter Medical Research Institute (HMRI), New Lambton Heights 2305, NSW, Australia.
| | - Judith Weidenhofer
- Faculty of Health, The University of Newcastle, Ourimbah 2258, NSW, Australia.
- Hunter Medical Research Institute (HMRI), New Lambton Heights 2305, NSW, Australia.
| | - Costas E Stathopoulos
- School of Science, Engineering and Technology, University of Abertay, Dundee, Scotland DD1 1HG, UK.
| | - Paul D Roach
- Faculty of Science, The University of Newcastle, Ourimbah 2258, NSW, Australia.
| | - Christopher J Scarlett
- Pancreatic Cancer Research Group, School of Environmental & Life Sciences, University of Newcastle, Ourimbah 2258, NSW, Australia.
- Faculty of Science, The University of Newcastle, Ourimbah 2258, NSW, Australia.
- Hunter Medical Research Institute (HMRI), New Lambton Heights 2305, NSW, Australia.
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Wani TA, Masoodi F, Gani A, Baba WN, Rahmanian N, Akhter R, Wani IA, Ahmad M. Olive oil and its principal bioactive compound: Hydroxytyrosol – A review of the recent literature. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.05.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jabalbarezi Hukerdi Y, Fathi MH, Rashidi L, Ganjkhanlou M. The Study of Physicochemical Properties and Nutrient Composition of Mari Olive Leaf Cultivated in Iran. NUTRITION AND FOOD SCIENCES RESEARCH 2018. [DOI: 10.29252/nfsr.5.2.39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Şahin S, Bilgin M. Olive tree (Olea europaea L.) leaf as a waste by-product of table olive and olive oil industry: a review. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:1271-1279. [PMID: 28799642 DOI: 10.1002/jsfa.8619] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 05/31/2017] [Accepted: 08/04/2017] [Indexed: 06/07/2023]
Abstract
Research into finding new uses for by-products of table olive and olive oil industry are of great value not only to the economy but also to the environment where olives are grown and to the human health. Since leaves represent around 10% of the total weight of olives arriving at the mill, it is worth obtaining high added-value compounds from those materials for the preparation of dietary supplements, nutraceuticals, functional food ingredients or cosmeceuticals. In this review article, olive tree (Olea europaea L.) leaf is reviewed as being a potential inexpensive, renewable and abundant source of biophenols. The importance of this agricultural and industrial waste is emphasised by means of describing its availability, nutritional and therapeutic effects and studies conducted on this field. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Selin Şahin
- Istanbul University, Engineering Faculty, Department of Chemical Engineering, Avcilar, Istanbul, Turkey
| | - Mehmet Bilgin
- Istanbul University, Engineering Faculty, Department of Chemical Engineering, Avcilar, Istanbul, Turkey
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Benefit of Oleuropein Aglycone for Alzheimer's Disease by Promoting Autophagy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:5010741. [PMID: 29675133 PMCID: PMC5838478 DOI: 10.1155/2018/5010741] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 01/21/2018] [Indexed: 12/11/2022]
Abstract
Alzheimer's disease is a proteinopathy characterized by accumulation of hyperphosphorylated Tau and β-amyloid. Autophagy is a physiological process by which aggregated proteins and damaged organelles are eliminated through lysosomal digestion. Autophagy deficiency has been demonstrated in Alzheimer's patients impairing effective elimination of aggregates and damaged mitochondria, leading to their accumulation, increasing their toxicity and oxidative stress. In the present study, we demonstrated by microarray analysis the downregulation of fundamental autophagy and mitophagy pathways in Alzheimer's patients. The benefits of the Mediterranean diet on Alzheimer's disease and cognitive impairment are well known, attributing this effect to several polyphenols, such as oleuropein aglycone (OLE), present in extra virgin olive oil. OLE is able to induce autophagy, achieving a decrease of aggregated proteins and a reduction of cognitive impairment in vivo. This effect is caused by the modulation of several pathways including the AMPK/mTOR axis and the activation of autophagy gene expression mediated by sirtuins and histone acetylation or EB transcription factor. We propose that supplementation of diet with extra virgin olive oil might have potential benefits for Alzheimer's patients by the induction of autophagy by OLE.
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Ramírez-Expósito MJ, Martínez-Martos JM. Anti-Inflammatory and Antitumor Effects of Hydroxytyrosol but Not Oleuropein on Experimental Glioma In Vivo. A Putative Role for the Renin-Angiotensin System. Biomedicines 2018; 6:biomedicines6010011. [PMID: 29373553 PMCID: PMC5874668 DOI: 10.3390/biomedicines6010011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/21/2018] [Accepted: 01/23/2018] [Indexed: 12/20/2022] Open
Abstract
Functional roles of the angiotensin peptides of the renin-angiotensin system (RAS) cascade can be analyzed through their corresponding proteolytic regulatory enzymes aspartyl aminopeptidase (ASAP), aminopeptidase A (APA), aminopeptidase B (APB), aminopeptidase N (APN) and insulin-regulated aminopeptidase (IRAP). These enzyme activities generate active or inactive angiotensin peptides that alter the ratios between their bioactive forms, regulating several important processes such as the regulation of cardiovascular functions, body water regulation, normal memory consolidation and retrieval, but also cell growth, differentiation and apoptosis or the inflammatory response. We have previously described that the treatment with hydroxytyrosol but not with oleuropein or with the mixture of both compounds led to the significant inhibition of tumor growth in an in vivo glioma model by mechanisms not only related to redox balance. Using this glioma model, here we analyze the effects of the phenolic compounds oleuropein and hydroxytyrosol in circulating RAS-regulating ASAP, APA, APN, APB and IRAP specific activities and the pro-inflammatory cytokines IL-6 and TNFα to understand the relationship between the antitumor and anti-inflammatory effects of hydroxytyrosol, but not oleuropein, and the components of the RAS. We found that oleuropein increased all the activities analyzed and promoted a pro-inflammatory status, whereas hydroxytyrosol only modified ASAP and IRAP activities and promotes an anti-inflammatory status. When administrated together, oleuropein overrode the effects of hydroxytyrosol. Our results suggest a role for angiotensin III and angiotensin 1-7 in both tumor growth inhibition and anti-inflammatory response promoted by hydroxytyrosol.
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Affiliation(s)
- María Jesús Ramírez-Expósito
- Experimental and Clinical Physiopathology Research Group CTS1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Campus Universitario Las Lagunillas, E23071 Jaén, Spain.
| | - José Manuel Martínez-Martos
- Experimental and Clinical Physiopathology Research Group CTS1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Campus Universitario Las Lagunillas, E23071 Jaén, Spain.
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36
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Qidwai A, Pandey M, Kumar R, Dikshit A. Comprehensive evaluation of pharmacological properties of Olea europaea L. for Cosmeceuticals prospects. CLINICAL PHYTOSCIENCE 2017. [DOI: 10.1186/s40816-017-0050-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ahmad Farooqi A, Fayyaz S, Silva AS, Sureda A, Nabavi SF, Mocan A, Nabavi SM, Bishayee A. Oleuropein and Cancer Chemoprevention: The Link is Hot. Molecules 2017; 22:molecules22050705. [PMID: 28468276 PMCID: PMC6154543 DOI: 10.3390/molecules22050705] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/18/2017] [Accepted: 04/24/2017] [Indexed: 12/12/2022] Open
Abstract
Cancer comprises a collection of related diseases characterized by the existence of altered cellular pathways resulting in an abnormal tendency for uncontrolled growth. A broad spectrum, coordinated, and personalized approach focused on targeting diverse oncogenic pathways with low toxicity and economic natural compounds can provide a real benefit as a chemopreventive and/or treatment of this complex disease. Oleuropein, a bioactive phenolic compound mainly present in olive oil and other natural sources, has been reported to modulate several oncogenic signalling pathways. This review presents and critically discusses the available literature about the anticancer and onco-suppressive activity of oleuropein and the underlying molecular mechanisms implicated in the anticarcinogenic and therapeutic effects. The existence of limitations and the promising perspectives of research on this phenolic compound are also critically analyzed and discussed.
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Affiliation(s)
- Ammad Ahmad Farooqi
- Laboratory for Translational Oncology and Personalized Medicine, Rashid Latif Medical College, Lahore 54000, Pakistan.
| | - Sundas Fayyaz
- Laboratory for Translational Oncology and Personalized Medicine, Rashid Latif Medical College, Lahore 54000, Pakistan.
| | - Ana Sanches Silva
- Department of Food and Nutrition, National Institute of Health Dr. Ricardo Jorge, I.P., Av. Padre Cruz, 1649-016 Lisbon, Portugal.
- Center for Study in Animal Science, Praça Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal.
| | - Antoni Sureda
- Research Group on Community Nutrition and Oxidative Stress and CIBEROBN-Physiopathology of Obesity and Nutrition, University of Balearic Islands, Palma de Mallorca E-07122, Balearic Islands, Spain.
| | - Seyed Fazel Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran.
| | - Andrei Mocan
- Department of Pharmaceutical Botany, Iuliu Hațieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania.
- ICHAT and Institute for Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăştur 3-5, 400372 Cluj-Napoca, Romania.
| | - Seyed Mohammad Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran.
| | - Anupam Bishayee
- Department of Pharmaceutical Sciences, College of Pharmacy, Larkin University, Miami, FL 33169, USA.
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38
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Sepporta MV, Fuccelli R, Rosignoli P, Ricci G, Servili M, Fabiani R. Oleuropein Prevents Azoxymethane-Induced Colon Crypt Dysplasia and Leukocytes DNA Damage in A/J Mice. J Med Food 2016; 19:983-989. [DOI: 10.1089/jmf.2016.0026] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Maria Vittoria Sepporta
- Biochemistry and Molecular Biology Unit, Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - Raffaela Fuccelli
- Biochemistry and Molecular Biology Unit, Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - Patrizia Rosignoli
- Biochemistry and Molecular Biology Unit, Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - Giovanni Ricci
- Laboratory of Histology, Central Animal Unit, University of Perugia, Perugia, Italy
| | - Maurizio Servili
- Food Science and Technology Unit, Department of Agricultural, Food and Environmental Science, University of Perugia, Perugia, Italy
| | - Roberto Fabiani
- Biochemistry and Molecular Biology Unit, Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
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Boss A, Bishop KS, Marlow G, Barnett MPG, Ferguson LR. Evidence to Support the Anti-Cancer Effect of Olive Leaf Extract and Future Directions. Nutrients 2016; 8:nu8080513. [PMID: 27548217 PMCID: PMC4997426 DOI: 10.3390/nu8080513] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 08/12/2016] [Accepted: 08/16/2016] [Indexed: 12/28/2022] Open
Abstract
The traditional Mediterranean diet (MD) is associated with long life and lower prevalence of cardiovascular disease and cancers. The main components of this diet include high intake of fruit, vegetables, red wine, extra virgin olive oil (EVOO) and fish, low intake of dairy and red meat. Olive oil has gained support as a key effector of health benefits and there is evidence that this relates to the polyphenol content. Olive leaf extract (OLE) contains a higher quantity and variety of polyphenols than those found in EVOO. There are also important structural differences between polyphenols from olive leaf and those from olive fruit that may improve the capacity of OLE to enhance health outcomes. Olive polyphenols have been claimed to play an important protective role in cancer and other inflammation-related diseases. Both inflammatory and cancer cell models have shown that olive leaf polyphenols are anti-inflammatory and protect against DNA damage initiated by free radicals. The various bioactive properties of olive leaf polyphenols are a plausible explanation for the inhibition of progression and development of cancers. The pathways and signaling cascades manipulated include the NF-κB inflammatory response and the oxidative stress response, but the effects of these bioactive components may also result from their action as a phytoestrogen. Due to the similar structure of the olive polyphenols to oestrogens, these have been hypothesized to interact with oestrogen receptors, thereby reducing the prevalence and progression of hormone related cancers. Evidence for the protective effect of olive polyphenols for cancer in humans remains anecdotal and clinical trials are required to substantiate these claims idea. This review aims to amalgamate the current literature regarding bioavailability and mechanisms involved in the potential anti-cancer action of olive leaf polyphenols.
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Affiliation(s)
- Anna Boss
- Discipline of Nutrition, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
| | - Karen S Bishop
- Auckland Cancer Society Research Centre, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
| | - Gareth Marlow
- Discipline of Nutrition, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
| | - Matthew P G Barnett
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand.
| | - Lynnette R Ferguson
- Discipline of Nutrition, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
- Auckland Cancer Society Research Centre, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
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Liu M, Wang J, Huang B, Chen A, Li X. Oleuropein inhibits the proliferation and invasion of glioma cells via suppression of the AKT signaling pathway. Oncol Rep 2016; 36:2009-16. [DOI: 10.3892/or.2016.4978] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 05/12/2016] [Indexed: 11/06/2022] Open
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Boukes GJ, van de Venter M. The apoptotic and autophagic properties of two natural occurring prodrugs, hyperoside and hypoxoside, against pancreatic cancer cell lines. Biomed Pharmacother 2016; 83:617-626. [PMID: 27459118 DOI: 10.1016/j.biopha.2016.07.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 06/30/2016] [Accepted: 07/15/2016] [Indexed: 12/19/2022] Open
Abstract
Pancreatic cancer is only the 12th most common cancer, but the fourth leading cause of cancer-related deaths in the world. This is due to late prognosis, poor response to chemotherapy and early metastases. Natural prodrugs may play an important role in the treatment of pancreatic cancer. The main aim of this study was to determine the cytotoxicity of five natural prodrugs, namely harpagoside, hyperoside, hypoxoside, oleuropein and polydatin, by investigating apoptosis and autophagy as possible mechanism/s of action. Hypoxoside and hyperoside have shown selective cytotoxicity at IC50 values of ∼25 and 50μM against INS-1 and MIA PaCa-2 pancreatic cancer cells, respectively. Hypoxoside and hyperoside induced G2/M phase arrest and caspase-3 activation in INS-1 and MIA PaCa-2 cells, respectively. Hoechst/phalloidin staining confirmed morphological changes, including condensed chromatin multinucleation, membrane blebbing and loss of cytoskeletal arrangement in INS-1 and MIA PaCa-2 cells. Acridine orange staining was absent in INS-1 (hypoxoside) and MIA PaCa-2 (hyperoside) treated cells, whereas LC3B expression was not significantly increased. INS-1 and MIA PaCa-2 treated cells favour the cell death pathway, apoptosis, over the cell survival pathway, autophagy.
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Affiliation(s)
- Gerhardt J Boukes
- Department of Biochemistry and Microbiology, Medicinal Plant and Natural Product Research Group, P.O. Box 77000, Nelson Mandela Metropolitan University, Port Elizabeth 6031, South Africa
| | - Maryna van de Venter
- Department of Biochemistry and Microbiology, Medicinal Plant and Natural Product Research Group, P.O. Box 77000, Nelson Mandela Metropolitan University, Port Elizabeth 6031, South Africa.
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42
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Hassen I, Casabianca H, Hosni K. Biological activities of the natural antioxidant oleuropein: Exceeding the expectation – A mini-review. J Funct Foods 2015. [DOI: 10.1016/j.jff.2014.09.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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43
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Goldsmith CD, Vuong QV, Sadeqzadeh E, Stathopoulos CE, Roach PD, Scarlett CJ. Phytochemical properties and anti-proliferative activity of Olea europaea L. leaf extracts against pancreatic cancer cells. Molecules 2015; 20:12992-3004. [PMID: 26193251 PMCID: PMC6332116 DOI: 10.3390/molecules200712992] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/13/2015] [Accepted: 07/14/2015] [Indexed: 12/20/2022] Open
Abstract
Olea europaea L. leaves are an agricultural waste product with a high concentration of phenolic compounds; especially oleuropein. Oleuropein has been shown to exhibit anti-proliferative activity against a number of cancer types. However, they have not been tested against pancreatic cancer, the fifth leading cause of cancer related death in Western countries. Therefore, water, 50% ethanol and 50% methanol extracts of Corregiola and Frantoio variety Olea europaea L. leaves were investigated for their total phenolic compounds, total flavonoids and oleuropein content, antioxidant capacity and anti-proliferative activity against MiaPaCa-2 pancreatic cancer cells. The extracts only had slight differences in their phytochemical properties, and at 100 and 200 μg/mL, all decreased the viability of the pancreatic cancer cells relative to controls. At 50 μg/mL, the water extract from the Corregiola leaves exhibited the highest anti-proliferative activity with the effect possibly due to early eluting HPLC peaks. For this reason, olive leaf extracts warrant further investigation into their potential anti-pancreatic cancer benefits.
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Affiliation(s)
- Chloe D Goldsmith
- Nutrition Food & Health Research Group, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
| | - Quan V Vuong
- Nutrition Food & Health Research Group, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
| | - Elham Sadeqzadeh
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Ourimbah, NSW 2258, Australia.
| | - Costas E Stathopoulos
- Faculty of Bioscience Engineering, Ghent University Global Campus, Incheon 406-840, Korea.
| | - Paul D Roach
- Nutrition Food & Health Research Group, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
| | - Christopher J Scarlett
- Nutrition Food & Health Research Group, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
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44
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Rahmanian N, Jafari SM, Wani TA. Bioactive profile, dehydration, extraction and application of the bioactive components of olive leaves. Trends Food Sci Technol 2015. [DOI: 10.1016/j.tifs.2014.12.009] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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45
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Achmon Y, Fishman A. The antioxidant hydroxytyrosol: biotechnological production challenges and opportunities. Appl Microbiol Biotechnol 2014; 99:1119-30. [PMID: 25547836 DOI: 10.1007/s00253-014-6310-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 12/06/2014] [Accepted: 12/09/2014] [Indexed: 10/24/2022]
Abstract
Hydroxytyrosol (HT) is a highly potent antioxidant originating in nature as a second metabolite of plants, most abundantly in olives (Olea europaea). In the last decade, numerous research studies showed the health benefits of antioxidants in general and those of HT in particular. As olive oil is a prime constituent of the health-promoting Mediterranean diet, HT has obtained recognition for its attributes, supported by a recent health claim of the European Food Safety Authority. HT is already used as a food supplement and in cosmetic products, but it has the potential to be used as a food additive and drug, based on its anticarcinogenic, anti-inflammatory, antiapoptotic and neuroprotective activity. Nevertheless, there is a large gap between the potential of HT and its current availability in the market due to its high price tag. In this review, the challenges of producing HT using biotechnological methods are described with an emphasis on the substrate source, the biocatalyst and the process parameters, in order to narrow the gap towards an efficient bio-based industrial process.
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Affiliation(s)
- Yigal Achmon
- Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, 3200003, Israel
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Bisignano C, Filocamo A, Ginestra G, Giofre' SV, Navarra M, Romeo R, Mandalari G. 3,4-DHPEA-EA from Olea Europaea L. is effective against standard and clinical isolates of Staphylococcus sp. Ann Clin Microbiol Antimicrob 2014; 13:24. [PMID: 24986240 PMCID: PMC4107751 DOI: 10.1186/1476-0711-13-24] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 05/27/2014] [Indexed: 12/04/2022] Open
Abstract
Background The aim of the present work was to evaluate the antibacterial effect of 3,4-DHPEA-EA (methyl-4-(2-(3,4-dihydroxyphenethoxy)-2-oxoethyl)-3-formyl-2-methyl-3,4-dihydro-2H-pyran-5-carboxylate), a derivate of oleuropein, against a range of Gram-positive bacteria, including ATCC strains, food and clinical isolates. Methods The minimum inhibitory concentrations (MICs) of 3,4-DHPEA-EA were determined by the broth microdilution method and the Bioscreen C. Results 3,4-DHPEA-EA was effective against ATCC and clinical isolates of Staphylococcus aureus (MIC values between 125 and 250 μg/ml) and ATCC and clinical isolates of Staphylococcus epidermidis (MIC values between 7.81 and 62.5 μg/ml). No significant differences were observed between the two solvents (methanol and DMSO) used to dissolve 3,4-DHPEA-EA. Conclusions The results obtained could be used to develop novel therapies for the treatment of skin infections. Further studies need to be performed to elucidate the formation of 3,4-DHPEA-EA by acid hydrolysis of oleuropein in the human stomach.
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Affiliation(s)
| | | | | | | | | | | | - Giuseppina Mandalari
- Dipartimento di Scienze del Farmaco e Prodotti per la Salute, University of Messina, Viale Annunziata, 98100 Messina, Italy.
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Kuppusamy P, Yusoff MM, Maniam GP, Ichwan SJA, Soundharrajan I, Govindan N. Nutraceuticals as potential therapeutic agents for colon cancer: a review. Acta Pharm Sin B 2014; 4:173-81. [PMID: 26579381 PMCID: PMC4629076 DOI: 10.1016/j.apsb.2014.04.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 01/14/2014] [Accepted: 03/27/2014] [Indexed: 12/27/2022] Open
Abstract
Colon cancer is a world-wide health problem and the second-most dangerous type of cancer, affecting both men and women. The modern diet and lifestyles, with high meat consumption and excessive alcohol use, along with limited physical activity has led to an increasing mortality rate for colon cancer worldwide. As a result, there is a need to develop novel and environmentally benign drug therapies for colon cancer. Currently, nutraceuticals play an increasingly important role in the treatment of various chronic diseases such as colon cancer, diabetes and Alzheimer׳s disease. Nutraceuticals are derived from various natural sources such as medicinal plants, marine organisms, vegetables and fruits. Nutraceuticals have shown the potential to reduce the risk of colon cancer and slow its progression. These dietary substances target different molecular aspects of colon cancer development. Accordingly, this review briefly discusses the medicinal importance of nutraceuticals and their ability to reduce the risk of colorectal carcinogenesis.
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Key Words
- 5-FU, 5-fluorouracil
- ACC, acetyl CoA carboxylase
- ACF, aberrant crypt foci
- ACL, ATP-citrate lyase
- ASTX, astaxanthin
- COX-2, cyclooxygenase 2
- Colon cancer
- DHA, decahexaenoic acid
- DMH, 1,2-dimethylhydrazine
- DR, death receptor
- EGCG, epigallocatechingallate
- EPA, eicosapentaenoic acid
- FAS, fatty acid synthase
- GADD, growth arrest and DNA damage
- HMG-CoA, 3-hydroxy-3-methyl-glutaryl CoA
- HUVEC, human umbilical vein endothelial cell
- IGF, insulin-like growth factor
- IL, interleukin
- LDH, lactate dehydrogenase
- MMP, matrix metallo-proteins
- Marine organisms
- NF-κB, nuclear factor-kappa B
- Nutraceuticals
- PRAP, prolactin receptor associated protein
- Plant derivatives
- TCA, tricarboxylic acid cycle
- TNF, tumor necrosis factor
- TRAIL, tumor necrosis factor-related apoptosis-induced ligand
- Therapeutics
- VEGF, vascular endothelial growth factor
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Affiliation(s)
- Palaniselvam Kuppusamy
- Mammalian Cell Technology Laboratory, Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300, Gambang, Kuantan, Pahang, Malaysia
| | - Mashitah M. Yusoff
- Mammalian Cell Technology Laboratory, Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300, Gambang, Kuantan, Pahang, Malaysia
| | - Gaanty Pragas Maniam
- Mammalian Cell Technology Laboratory, Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300, Gambang, Kuantan, Pahang, Malaysia
| | | | - Ilavenil Soundharrajan
- Department of Biochemistry, National Institute of Animal Science, Suwon-si, Gyeonggi-do 441706, South Korea
| | - Natanamurugaraj Govindan
- Mammalian Cell Technology Laboratory, Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300, Gambang, Kuantan, Pahang, Malaysia
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Hassanzadeh K, Akhtari K, Hassanzadeh H, Zarei SA, Fakhraei N, Hassanzadeh K. The role of structural C--H compared with phenolic OH sites on the antioxidant activity of oleuropein and its derivatives as a great non-flavonoid family of the olive components: a DFT study. Food Chem 2014; 164:251-8. [PMID: 24996331 DOI: 10.1016/j.foodchem.2014.05.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 04/30/2014] [Accepted: 05/06/2014] [Indexed: 11/17/2022]
Abstract
Oleuropein and its derivatives are the main phenolic compounds of Olea europaea L. leaf and fruit. The structure-antioxidant activity relationship was considered for studying the radical scavenging activity of this non-flavonoid family of the olive components using density functional theory (DFT). The structure of these compounds were optimized employing the B3LYP/6-31G (d,p) and the role of some structural CH positions was compared with phenolic OH sites on radical scavenging. As a result, a radical unique position (C3) in the oleuropein, characterized by low BDE (Bond Dissociation Enthalpy), reasonable spin density and electron distribution, was identified. The experimental results of the previous publications of oleuropein for NO and OH scavenging confirmed the presence of this unique active site in its molecular structure. According to the results, 2,2-diphenylpicrylhydrazyl (DPPH) cannot find this non-marginal active site. Therefore, DPPH may not be a determinant assay for all antioxidant comparisons. Solvent effects were considered in all calculations using a Polarized Continuum Model (PCM) at the B3LYP/6-31G (d,p) level. Solvation calculations were carried out for benzene (ε=2.3) to simulate the oil environment compared to gas phase.
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Affiliation(s)
- Keyumars Hassanzadeh
- Chemistry Department, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran; Young Researchers and Elites Club, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran.
| | - Keivan Akhtari
- Physics Department, University of Kurdistan, P.O. Box 416, Sanandaj, Iran.
| | - Halaleh Hassanzadeh
- Biology Department, Science and Research Branch, Islamic Azad University, Sanandaj, Iran
| | - Seyed Amir Zarei
- Chemistry Department, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
| | - Nahid Fakhraei
- Brian and Spinal Injury Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Katayoun Hassanzadeh
- Physiology and Pharmacology Department, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
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Servili M, Sordini B, Esposto S, Urbani S, Veneziani G, Di Maio I, Selvaggini R, Taticchi A. Biological Activities of Phenolic Compounds of Extra Virgin Olive Oil. Antioxidants (Basel) 2013; 3:1-23. [PMID: 26784660 PMCID: PMC4665453 DOI: 10.3390/antiox3010001] [Citation(s) in RCA: 161] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 11/27/2013] [Accepted: 11/28/2013] [Indexed: 12/12/2022] Open
Abstract
Over the last few decades, multiple biological properties, providing antioxidant, anti-inflammatory, chemopreventive and anti-cancer benefits, as well as the characteristic pungent and bitter taste, have been attributed to Extra Virgin Olive Oil (EVOO) phenols. In particular, growing efforts have been devoted to the study of the antioxidants of EVOO, due to their importance from health, biological and sensory points of view. Hydrophilic and lipophilic phenols represent the main antioxidants of EVOO, and they include a large variety of compounds. Among them, the most concentrated phenols are lignans and secoiridoids, with the latter found exclusively in the Oleaceae family, of which the drupe is the only edible fruit. In recent years, therefore, we have tackled the study of the main properties of phenols, including the relationships between their biological activity and the related chemical structure. This review, in fact, focuses on the phenolic compounds of EVOO, and, in particular, on their biological properties, sensory aspects and antioxidant capacity, with a particular emphasis on the extension of the product shelf-life.
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Affiliation(s)
- Maurizio Servili
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Beatrice Sordini
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Sonia Esposto
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Stefania Urbani
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Gianluca Veneziani
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Ilona Di Maio
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Roberto Selvaggini
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
| | - Agnese Taticchi
- Dipartimento di Scienze Economico-Estimative e degli Alimenti, Sezione di Tecnologie e Biotecnologie degli Alimenti, Università degli Studi di Perugia, Via S. Costanzo, Perugia 06126, Italy.
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