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Kanner J. Food Polyphenols as Preventive Medicine. Antioxidants (Basel) 2023; 12:2103. [PMID: 38136222 PMCID: PMC10740609 DOI: 10.3390/antiox12122103] [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: 10/29/2023] [Revised: 12/04/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
Reactive oxygen species (ROS) are the initiators in foods and in the stomach of oxidized dietary lipids, proteins, and lipid-oxidation end-products (ALEs), inducing in humans the development of several chronic diseases and cancer. Epidemiological, human clinical and animal studies supported the role of dietary polyphenols and derivatives in prevention of development of such chronic diseases. There is much evidence that polyphenols/derivatives at the right timing and concentration, which is critical, acts mostly in the aerobic stomach and generally in the gastrointestinal tract as reducing agents, scavengers of free radicals, trappers of reactive carbonyls, modulators of enzyme activity, generators of beneficial gut microbiota and effectors of cellular signaling. In the blood system, at low concentration, they act as generators of electrophiles and low concentration of H2O2, acting mostly as cellular signaling, activating the PI3K/Akt-mediated Nrf2/eNOS pathways and inhibiting the inflammatory transcription factor NF-κB, inducing the cells, organs and organism for eustress, adaptation and surviving.
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Affiliation(s)
- Joseph Kanner
- Department of Food Science, ARO, Volcani Center, Bet-Dagan 7505101, Israel; or
- Institute of Biochemistry, Food Science and Nutrtion, Faculty of Agriculture Food and Environment, The Hebrew University of Jerusalem, Rehovot 9190501, Israel
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2
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Chen X, Li L, Chen L, Shao W, Chen Y, Fan X, Liu Y, Tang C, Ding S, Xu X, Zhou G, Feng X. Tea polyphenols coated sodium alginate-gelatin 3D edible scaffold for cultured meat. Food Res Int 2023; 173:113267. [PMID: 37803580 DOI: 10.1016/j.foodres.2023.113267] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 07/08/2023] [Accepted: 07/11/2023] [Indexed: 10/08/2023]
Abstract
This study aimed to use edible scaffolds as a platform for animal stem cell expansion, thus constructing block-shaped cell culture meat. The tea polyphenols (TP)-coated 3D scaffolds were constructed of sodium alginate (SA) and gelatin (Gel) with good biocompatibility and mechanical support. Initially, the physicochemical properties and mechanical properties of SA-Gel-TP scaffolds were measured, and the biocompatibility of the scaffolds was evaluated by C2C12 cells. SEM results showed that the scaffold had a porous laminar structure with TP particles attached to the surface, while FT-IR results also demonstrated the encapsulation of TP coating on the scaffold. In addition, the porosity of all scaffolds was higher than 40% and the degradation rate during the incubation cycle was less than 40% and the S2-G1-TP0.1-3 h scaffold has excellent cell adhesion and extension. Subsequently, we inoculated rabbit skeletal muscle myoblasts (RbSkMC) on the scaffold and induced differentiation. The results showed good adhesion and extension behavior of RbSkMC on S2-G1-TP0.1-3 h scaffolds with high expression of myogenic differentiation proteins and genes, and SEM results confirmed the formation of myotubes. Additionally, the adhesion rate of cells on scaffolds with TP coating was 1.5 times higher than that on scaffolds without coating, which significantly improved the cell proliferation rate and the morphology of cells with extension on the scaffolds. Furthermore, rabbit-derived cultured meat had similar appearance and textural characteristics to fresh meat. These conclusions indicate the high potential of the scaffolds with TP coating as a platform for the production of cultured meat products.
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Affiliation(s)
- Xiaohong Chen
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Linzi Li
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Lin Chen
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China.
| | - Wei Shao
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Yan Chen
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Xiaojing Fan
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Yaping Liu
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Changbo Tang
- Lab of Meat Processing and Quality Control of EDU, College of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Shijie Ding
- Lab of Meat Processing and Quality Control of EDU, College of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Xinglian Xu
- Lab of Meat Processing and Quality Control of EDU, College of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Guanghong Zhou
- Lab of Meat Processing and Quality Control of EDU, College of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Xianchao Feng
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China.
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Mu K, Yao Y, Wang D, Kitts DD. Prooxidant capacity of phenolic acids defines antioxidant potential. Biochim Biophys Acta Gen Subj 2023; 1867:130371. [PMID: 37121280 DOI: 10.1016/j.bbagen.2023.130371] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/20/2023] [Accepted: 04/25/2023] [Indexed: 05/02/2023]
Abstract
Phenolic acids derived from vegetables, fruits and beverages are considered abundant sources of natural antioxidants consumed in the human diet. In addition to having well-known antioxidant activity, phenolic acids also exhibit pro-oxidant activity under selected conditions. We hypothesized that the availability of extracellular H2O2 derived from phenolic acid autoxidation will diffuse across cell membranes to participate as a messenger molecule to activate intracellular redox signaling in response to oxidative stress. We report on the relative activity of structurally different phenolic acids to generate specific changes in the extracellular - intracellular H2O2 flux that induces intracellular redox signaling corresponding to a function to reduce intracellular oxidative stress. HyPer-3 methodology was used to measure increases in intracellular H2O2 in differentiated Caco-2 intestinal cells in response to phenolic acid autoxidation and changes in extracellular H2O2 production. The potential for different phenolic acids to autoxidize and generate H2O2 was dependent on the structure and concentration of phenolic acid. Activation of nuclear factor erythroid 2-related factor (Nrf2) cell signaling was enhanced (p < 0.05) by phenolic acid induced H2O2 production, and mitigated when present along with catalase (p < 0.05), or, alternatively by blocking AQP3 function (p < 0.05) using DFP00173 as the AQP3 inhibitor. The relative capacity of phenolic acids to generate H2O2 on autoxidation was structure specific and corresponded to the level of Nrf2 cell signaling in differentiated Caco-2 epithelial cells. The Nrf2-Keap1 response paralleled the extent of reduced oxidative stress observed in differentiated Caco-2 cells determined by DCFH-DA.
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Affiliation(s)
- Kaiwen Mu
- Food Science, Food Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Yufeng Yao
- Laboratory of Bacterial Pathogenesis, Department of Microbiology and Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Infectious Diseases, Shanghai Ruijin Hospital, Shanghai, China; Shanghai Key Laboratory of Emergency Prevention, Diagnosis and Treatment of Respiratory Infectious Diseases, Shanghai, China
| | - Danni Wang
- Laboratory of Bacterial Pathogenesis, Department of Microbiology and Immunology, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - David D Kitts
- Food Science, Food Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, 2205 East Mall, Vancouver, BC V6T 1Z4, Canada.
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Jung F, Braune S, Jung CHG, Krüger-Genge A, Waldeck P, Petrick I, Küpper JH. Lipophilic and Hydrophilic Compounds from Arthrospira platensis and Its Effects on Tissue and Blood Cells-An Overview. Life (Basel) 2022; 12:1497. [PMID: 36294932 PMCID: PMC9605678 DOI: 10.3390/life12101497] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 09/14/2024] Open
Abstract
The cyanobacterium Arthrospira platensis (Spirulina platensis) is a natural source of considerable amounts of ingredients that are relevant for nutra- and pharmaceutical uses. Different hydrophilic and hydrophobic substances can be obtained by extraction from the biomass. The respective extraction techniques determine the composition of substances in the extract and thus its biological activity. In this short review, we provide an overview of the hydrophilic compounds (phenols, phycobiliproteins, polysaccharides, and vitamins) and lipophilic ingredients (chlorophylls, vitamins, fatty acids, and glycolipids) of Arthrospira platensis. The principal influences of these substances on blood and tissue cells are briefly summarized.
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Affiliation(s)
- Friedrich Jung
- Institute of Biotechnology, Molecular Cell Biology, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
| | - Steffen Braune
- Institute of Biotechnology, Molecular Cell Biology, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
- Faculty of Health Sciences Brandenburg, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
| | | | - Anne Krüger-Genge
- Department of Healthcare, Biomaterials and Cosmeceuticals, Fraunhofer-Institute for Applied Polymer Research, 14476 Potsdam-Golm, Germany
| | - Peter Waldeck
- Institute of Materials Chemistry, Thermodynamics, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
| | - Ingolf Petrick
- Institute of Materials Chemistry, Thermodynamics, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
| | - Jan-Heiner Küpper
- Institute of Biotechnology, Molecular Cell Biology, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
- Faculty of Health Sciences Brandenburg, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, Germany
- Carbon Biotech Social Enterprise AG, 01968 Senftenberg, Germany
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Polyphenols by Generating H 2O 2, Affect Cell Redox Signaling, Inhibit PTPs and Activate Nrf2 Axis for Adaptation and Cell Surviving: In Vitro, In Vivo and Human Health. Antioxidants (Basel) 2020; 9:antiox9090797. [PMID: 32867057 PMCID: PMC7555200 DOI: 10.3390/antiox9090797] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 12/29/2022] Open
Abstract
Human health benefits from different polyphenols molecules consumption in the diet, derived mainly by their common activities in the gastrointestinal tract and at the level of blood micro-capillary. In the stomach, intestine and colon, polyphenols act as reducing agents preventing lipid peroxidation, generation and absorption of AGEs/ALEs (advanced glycation end products/advanced lipid oxidation end products) and postprandial oxidative stress. The low absorption of polyphenols in blood does not support their activity as antioxidants and their mechanism of activity is not fully understood. The results are from in vitro, animal and human studies, detected by relevant oxidative stress markers. The review carries evidences that polyphenols, by generating H2O2 at nM concentration, exogenous to cells and organs, act as activators of signaling factors increasing cell Eustress. When polyphenols attain high concentration in the blood system, they generate H2O2 at µM concentration, acting as cytotoxic agents and Distress. Pre-treatment of cells or organisms with polyphenols, by generating H2O2 at low levels, inhibits cellular PTPs (protein tyrosine phosphatases), inducing cell signaling through transcription of the Nrf2 (nuclear factor erythroid 2-related factor 2) axis of adaptation and protection to oxidation stress. Polyphenols ingestion at the right amount and time during the meal acts synergistically at the level of the gastrointestinal tract (GIT) and blood system, for keeping the redox homeostasis in our organism and better balancing human health.
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Fuchs C, Bakuradze T, Steinke R, Grewal R, Eckert GP, Richling E. Polyphenolic composition of extracts from winery by-products and effects on cellular cytotoxicity and mitochondrial functions in HepG2 cells. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.103988] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Thilakarathna WPDW, Rupasinghe HPV. Microbial metabolites of proanthocyanidins reduce chemical carcinogen-induced DNA damage in human lung epithelial and fetal hepatic cells in vitro. Food Chem Toxicol 2019; 125:479-493. [PMID: 30735747 DOI: 10.1016/j.fct.2019.02.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 01/12/2019] [Accepted: 02/04/2019] [Indexed: 01/16/2023]
Abstract
Seven selected microbial metabolites of proanthocyanidins (MMP), 3-phenylpropionic, 4-hydroxyphenyl acetic, 3-(4-hydroxyphenyl) propionic, p-coumaric, benzoic acid, pyrogallol (PG), and pyrocatechol (PC) were evaluated for their ability to reduce chemical carcinogen-induced toxicity in human lung epithelial cells (BEAS-2B) and human fetal hepatic cells (WRL-68). Cells pre-treated with MMP were exposed to a known chemical carcinogen, 4-[(acetoxymethyl) nitrosamino]-1-(3-pyridyl)-1-butanone (NNKOAc) to assess MMP-mediated cytoprotection and reduction of DNA damage. PG in BEAS-2B and PC in WRL-68 cells mitigated the NNKOAc-induced cytotoxicity. Pre-incubation of PG depicted significant protection against NNKOAc-induced DNA damage in BEAS-2B cells. PC in WRL-68 cells showed similar activity. To understand the mechanisms of PG- and PC-mediated DNA damage reduction, the effect on DNA damage response (DDR) proteins, cellular reactive oxygen species (ROS), total antioxidant capacity (TAC), glutathione peroxidase (GPx), and caspase activity were studied. PG and PC alter the DDR and may promote ATR-Chk1 and ATM-Chk2 pathways, respectively. Cellular oxidative stress induced by NNKOAc was mitigated by PG and PC through enhanced GPx expression and TAC. PG and PC suppressed the activation of the extrinsic apoptotic pathway (caspase 3 and 8) provoked by NNKOAc. MMP are beneficial in chemoprevention by reducing cellular DNA damage.
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Affiliation(s)
- W P D Wass Thilakarathna
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada
| | - H P Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada; Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
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8
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Krämer AC, Torreggiani A, Davies MJ. Effect of Oxidation and Protein Unfolding on Cross-Linking of β-Lactoglobulin and α-Lactalbumin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10258-10269. [PMID: 29096436 DOI: 10.1021/acs.jafc.7b03839] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Oxidation and heat treatment can initiate changes in the amino acid composition, structure, solubility, hydrophobicity, conformation, function, and susceptibility to proteolysis of proteins. These can result in adverse consequences for mammals, plants, foodstuffs, and pharmaceuticals. This study investigated whether and how individual or combined treatment with heat, a commonly encountered factor in industrial processing, and H2O2 alters the structure and composition of two major milk whey proteins, α-lactalbumin and β-lactoglobulin, and mixtures of these. Thermal treatment induced reducible cross-links in isolated β-lactoglobulin, but not isolated α-lactalbumin under the conditions employed. Cross-linking occurred at lower temperatures and to a greater extent in the presence of low concentrations of H2O2. H2O2 did not induce cross-linking in the absence of heat. Mixtures of α-lactalbumin and β-lactoglobulin showed similar behavior, except that mixed α-lactalbumin-β-lactoglobulin dimers were detected. Cross-linking was associated with formation of sulfenic acids (RS-OH species), oxidation of methionine residues, cleavage of disulfide bonds in α-lactalbumin, altered conformation of disulfide bonds in β-lactoglobulin, alterations in the fluorescence intensity and maximum emission wavelength of endogenous tryptophan residues, and binding of the hydrophobic probe 8-anilinonaphthalenesulfonate. These data are consistent with increased unfolding and subsequent aggregation of the protein, with these changes being maximized in the presence of both heat and H2O2. The enhanced aggregation detected with H2O2 is consistent with additional pathways to aggregation above that induced by heat alone. These mechanistic insights provide potential strategies for modulating the extent and nature of protein modification induced by thermal and oxidant treatment.
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Affiliation(s)
- Anna C Krämer
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen , Copenhagen 2200, Denmark
| | - Armida Torreggiani
- Istituto per la Sintesi e la Fotoreattivita, ISOF-CNR, Area della Ricerca di Bologna , Via P. Gobetti 101, 40129 Bologna, Italy
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen , Copenhagen 2200, Denmark
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Moshawih S, Cheema MS, Ibraheem ZO, Tailan ND, Hakim MN. Cosmos caudatus extract/fractions reduce smooth muscle cells migration and invasion in vitro : A potential benefit of suppressing atherosclerosis. Porto Biomed J 2017; 2:293-300. [PMID: 32258785 PMCID: PMC6806747 DOI: 10.1016/j.pbj.2017.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 03/25/2017] [Indexed: 11/26/2022] Open
Abstract
HIGHLIGHTS Cosmos caudatus Ethanolic extract fractionation by n-butanol produced a phenolics-saponin rich fraction.Cosmos caudatus butanol fraction was the most potent in all antioxidant and MTT assays.High concentrations of all fractions increased cells migration and invasion in vitro.Butanol fraction intermediate concentration maximally inhibited VSMC migration and invasion.Mild concentrations of crude and butanol fractions showed the best invasion inhibition index. BACKGROUND Cosmos caudatus Kunth is a medicinal herb used traditionally in Latin America and South East Asia to retard aging, rigidify bones and for several cardiovascular uses. OBJECTIVE Is to assess C. caudatus extract/fractions' antioxidant and vascular smooth muscle cells (VSMC) migration and invasion inhibition capacity in vitro. METHODS Cosmos caudatus shoots were extracted by cold maceration in 50% ethanol to produce crude (CEE), and then the extract was fractionated to butanol (Bu.F), and aqueous fractions (Aq.f). Phenolics and saponins were quantified in extract and fractions by colorimetric methods and their antioxidant capacity was assayed in four different tests. Cytotoxic effect and safety level concentrations were determined for the fractions by using MTT assay. Migration and invasion inhibitory potential were measured in vitro at three different concentrations equivalent to (IC10, IC25, and IC50). Finally, invasion inhibitory index was calculated to obtain the best fraction(s) that show(s) the highest ratio of cell invasion inhibition to the total cell migration inhibition. RESULTS Butanol fraction yield was the lowest; nevertheless, its phytochemical contents, antioxidant activities as well as its potency were the highest. Unlike other fractions, Bu.F was strongly correlated with all antioxidant assays experimented. In addition, it has the highest inhibitory effect at IC25 against VSMCs migration and invasion that accounts for 53.93% and 59.94% respectively. Unexpectedly, Bu.F and CEE at IC10 displayed the highest invasion inhibitory index (approx. 68%). CONCLUSION Butanol fraction of C. caudatus offers a potentiality for the discovery of new leads for preventing atherosclerosis.
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Affiliation(s)
- Said Moshawih
- Department of Biomedical Sciences, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Selangor, Malaysia
| | - Manraj S Cheema
- Department of Biomedical Sciences, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Selangor, Malaysia
| | - Zaid O Ibraheem
- Department of Human Anatomy, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Selangor, Malaysia
| | - Nirmala Devi Tailan
- Department of Biomedical Sciences, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Selangor, Malaysia
| | - Muhammad Nazrul Hakim
- Department of Biomedical Sciences, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Selangor, Malaysia
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Ogura K, Ogura M, Shoji T, Sato Y, Tahara Y, Yamano G, Sato H, Sugizaki K, Fujita N, Tatsuoka H, Usui R, Mukai E, Fujimoto S, Inagaki N, Nagashima K. Oral Administration of Apple Procyanidins Ameliorates Insulin Resistance via Suppression of Pro-Inflammatory Cytokine Expression in Liver of Diabetic ob/ob Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:8857-8865. [PMID: 27792335 DOI: 10.1021/acs.jafc.6b03424] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Procyanidins, the main ingredient of apple polyphenols, are known to possess antioxidative and anti-inflammatory effects associated closely with the pathophysiology of insulin resistance and type 2 diabetes. We investigated the effects of orally administered apple procyanidins (APCs) on glucose metabolism using diabetic ob/ob mice. We found no difference in body weight or body composition between mice treated with APCs and untreated mice. A 4 week oral administration of APCs containing water [0.5% (w/v)] ameliorated glucose tolerance, insulin resistance, and hepatic gluconeogenesis in ob/ob mice. APCs also suppressed the increase in the level of the pancreatic β-cell. Insulin-stimulated Akt phosphorylation was significantly enhanced; pro-inflammatory cytokine expression levels were significantly decreased, and c-Jun N-terminal kinase phosphorylation was downregulated in the liver of those mice treated with APCs. In conclusion, APCs ameliorate insulin resistance by improving hepatic insulin signaling through suppression of hepatic inflammation in ob/ob mice, which may be a mechanism with possible beneficial health effects of APCs in disturbed glucose metabolism.
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Affiliation(s)
- Kasane Ogura
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masahito Ogura
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Toshihiko Shoji
- Institute of Fruit Tree and Tea Science, NARO , 2-1 Fujimoto, Tsukuba, Ibaraki 305-8605, Japan
| | - Yuichi Sato
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yumiko Tahara
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Gen Yamano
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hiroki Sato
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kazu Sugizaki
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Naotaka Fujita
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hisato Tatsuoka
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Ryota Usui
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Eri Mukai
- Laboratory of Medical Physiology and Metabolism, Department of Biomedical Sciences, College of Life Science, Ritsumeikan University , 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan
| | - Shimpei Fujimoto
- Department of Endocrinology, Metabolism and Nephrology, Kochi Medical School, Kochi University , 185-1, Kohasu, Oko-cho, Nankoku, Kochi 783-8505, Japan
| | - Nobuya Inagaki
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kazuaki Nagashima
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , 54 Shogoinkawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
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Baum M, Schantz M, Leick S, Berg S, Betz M, Frank K, Rehage H, Schwarz K, Kulozik U, Schuchmann H, Richling E. Is the antioxidative effectiveness of a bilberry extract influenced by encapsulation? JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:2301-2307. [PMID: 24395460 DOI: 10.1002/jsfa.6558] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 11/29/2013] [Accepted: 01/06/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Bilberries (Vaccinium myrtillus L.) have been suggested to have preventive properties against diseases associated with oxidative stress such as colon cancer or inflammatory bowel diseases. Therefore the gastrointestinal tract is regarded as a potential target for prevention. In this study the antioxidative properties of a commercially available anthocyanin-rich bilberry extract (BE) were investigated in comparison with four different BE-loaded microcapsule systems. As markers to describe the antioxidant status in this cellular system, intracellular reactive oxygen species (ROS) levels, oxidative DNA damage and total glutathione (tGSH) levels were monitored. RESULTS Incubations with the BE-loaded capsule systems showed an increase in cellular glutathione levels and reduction of ROS levels at high BE concentrations (100-500 µg mL(-1) ) and a positive effect on the formation of DNA strand breaks (5-10 µg mL(-1) BE). The biological properties of BE-loaded pectin amide core-shell capsules, whey protein matrix capsules and coated apple pectin matrix capsules were comparable to those of the non-encapsulated BE. CONCLUSION Overall, the BE and the encapsulated BE types tested have antioxidative activity under the studied assay conditions in terms of the prevention of oxidative DNA damage, the reduction of intracellular ROS and the enhancement of cellular tGSH.
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Affiliation(s)
- Matthias Baum
- Department of Chemistry, Division of Food Chemistry and Toxicology, Molecular Nutrition, Technische Universität Kaiserslautern, Kaiserslautern, Germany
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12
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Lanzerstorfer P, Wruss J, Huemer S, Steininger A, Müller U, Himmelsbach M, Borgmann D, Winkler S, Höglinger O, Weghuber J. Bioanalytical characterization of apple juice from 88 grafted and nongrafted apple varieties grown in Upper Austria. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:1047-1056. [PMID: 24410208 DOI: 10.1021/jf4051232] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The compositional characteristics of untreated pure juice prepared from 88 apple varieties grown in the region of Eferding/Upper Austria were determined. Many of the analyzed varieties are noncommercial, old varieties not present in the market. The aim of the study was to quantitate the mineral, phosphate, trace elements, and polyphenolic content in order to identify varieties that are of particular interest for a wider distribution. Great variations among the investigated varieties could be found. This holds especially true for the total polyphenolic content (TPC) ranging from 103.2 to 2,275.6 mg/L. A clear dependence of the antioxidant capacity on the TPC levels was detected. Bioinformatics was employed to find specific interrelationships, such as Mg²⁺/Mn²⁺ and PO₄³⁻/K⁺, between the analyzed bio- and phytochemical parameters. Furthermore, special attention was drawn on putative effects of grafting on the phytochemical composition of apple varieties. By grafting 27 different apple varieties on two trees grown close to each other, it could be shown that the apple fruits remain their characteristic phytochemical composition. Finally, apple juice prepared from selected varieties was further characterized by additional biochemical analysis including cytotoxicity, epidermal growth factor receptor (EGFR) inhibition, and α-amylase activity tests. Cytotoxicity and inhibition of EGFR activation were found to be dependent on the TPC, while α-amylase activity was reduced by the apple juices independent of the presence of polyphenolic substances. Taken together selected apple varieties investigated within this study might serve as preferable sources for the development of apple-based food with a strong focus on health beneficial effects.
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Effects of proanthocyanidins on porcine pancreatic lipase: Conformation, activity, kinetics and thermodynamics. Process Biochem 2014. [DOI: 10.1016/j.procbio.2013.10.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Chkhikvishvili I, Sanikidze T, Gogia N, Mchedlishvili T, Enukidze M, Machavariani M, Vinokur Y, Rodov V. Rosmarinic acid-rich extracts of summer savory (Satureja hortensis L.) protect Jurkat T cells against oxidative stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:456253. [PMID: 24349613 PMCID: PMC3857744 DOI: 10.1155/2013/456253] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 10/13/2013] [Accepted: 10/17/2013] [Indexed: 12/22/2022]
Abstract
Summer savory (Satureja hortensis L., Lamiaceae) is used in several regions of the world as a spice and folk medicine. Anti-inflammatory and cytoprotective effects of S. hortensis and of its rosmarinic acid-rich phenolic fraction have been demonstrated in animal trials. However, previous studies of rosmarinic acid in cell models have yielded controversial results. In this study, we investigated the effects of summer savory extracts on H2O2-challenged human lymphoblastoid Jurkat T cells. LC-MS analysis confirmed the presence of rosmarinic acid and flavonoids such as hesperidin and naringin in the phenolic fraction. Adding 25 or 50 µM of H2O2 to the cell culture caused oxidative stress, manifested as generation of superoxide and peroxyl radicals, reduced cell viability, G0/G1 arrest, and enhanced apoptosis. This stress was significantly alleviated by the ethanolic and aqueous extracts of S. hortensis and by the partially purified rosmarinic acid fraction. The application of an aqueous S. hortensis extract doubled the activity of catalase and superoxide dismutase in the cells. The production of IL-2 and IL-10 interleukins was stimulated by H2O2 and was further enhanced by the addition of the S. hortensis extract or rosmarinic acid fraction. The H2O2-challenged Jurkat cells may serve as a model for investigating cellular mechanisms of cytoprotective phytonutrient effects.
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Affiliation(s)
- Irakli Chkhikvishvili
- Institute of Medical Biotechnology, Tbilisi State Medical University, 33 Vazha Pshavela Ave. 0177, Tbilisi, Georgia
| | - Tamar Sanikidze
- Institute of Medical Biotechnology, Tbilisi State Medical University, 33 Vazha Pshavela Ave. 0177, Tbilisi, Georgia
| | - Nunu Gogia
- Institute of Medical Biotechnology, Tbilisi State Medical University, 33 Vazha Pshavela Ave. 0177, Tbilisi, Georgia
| | - Tamar Mchedlishvili
- Institute of Medical Biotechnology, Tbilisi State Medical University, 33 Vazha Pshavela Ave. 0177, Tbilisi, Georgia
| | - Maia Enukidze
- Institute of Medical Biotechnology, Tbilisi State Medical University, 33 Vazha Pshavela Ave. 0177, Tbilisi, Georgia
| | - Marine Machavariani
- Institute of Medical Biotechnology, Tbilisi State Medical University, 33 Vazha Pshavela Ave. 0177, Tbilisi, Georgia
| | - Yakov Vinokur
- Department of Postharvest Science of Fresh Produce, Agricultural Research Organization, The Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
| | - Victor Rodov
- Department of Postharvest Science of Fresh Produce, Agricultural Research Organization, The Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
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Fujiwara K, Nakashima S, Sami M, Kanda T. Ninety-day dietary toxicity study of apple polyphenol extracts in Crl: CD (SD) rats. Food Chem Toxicol 2013; 56:214-22. [DOI: 10.1016/j.fct.2013.02.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 02/01/2013] [Accepted: 02/12/2013] [Indexed: 10/27/2022]
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Hill LE, Taylor TM, Gomes C. Antimicrobial Efficacy of Poly (DL-lactide-co-glycolide) (PLGA) Nanoparticles with Entrapped Cinnamon Bark Extract againstListeria monocytogenesandSalmonella typhimurium. J Food Sci 2013; 78:N626-32. [DOI: 10.1111/1750-3841.12069] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 01/08/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Laura E. Hill
- Dept. of Biological & Agricultural Engineering; A&M Univ. of Texas College Station, A&M Univ. of Texas; TX 77843-2117; U.S.A
| | - T. Matthew Taylor
- Dept. of Animal Science, A&M Univ. of Texas College Station; TX 77843-2471; U.S.A
| | - Carmen Gomes
- Dept. of Biological & Agricultural Engineering; A&M Univ. of Texas College Station, A&M Univ. of Texas; TX 77843-2117; U.S.A
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Teller N, Roth M, Esselen M, Fridrich D, Boettler U, Blust V, Will F, Dietrich H, Raul F, Hümmer W, Richling E, Schreier P, Marko D. Apple procyanidins affect several members of the ErbB receptor tyrosine kinase family in vitro. Food Funct 2013; 4:689-97. [DOI: 10.1039/c3fo30166d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Aneta W, Jan O, Magdalena M, Joanna W. Phenolic profile, antioxidant and antiproliferative activity of black and red currants(Ribes spp.)from organic and conventional cultivation. Int J Food Sci Technol 2012. [DOI: 10.1111/ijfs.12019] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wojdyło Aneta
- Department of Fruit and Vegetable Processing; Wroclaw University of Environmental and Life Science; 37/41 Chełmońskiego Street; 51-630; Wroclaw; Poland
| | - Oszmiański Jan
- Department of Fruit and Vegetable Processing; Wroclaw University of Environmental and Life Science; 37/41 Chełmońskiego Street; 51-630; Wroclaw; Poland
| | - Milczarek Magdalena
- Department of Experimental Oncology; Ludwik Hirszfeld Institute of Immunology and Experimental Therapy; Polish Academy of Sciences; R. Weigla Street, 12; 53-114; Wroclaw; Poland
| | - Wietrzyk Joanna
- Department of Experimental Oncology; Ludwik Hirszfeld Institute of Immunology and Experimental Therapy; Polish Academy of Sciences; R. Weigla Street, 12; 53-114; Wroclaw; Poland
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Erlank H, Elmann A, Kohen R, Kanner J. Polyphenols activate Nrf2 in astrocytes via H2O2, semiquinones, and quinones. Free Radic Biol Med 2011; 51:2319-27. [PMID: 22037513 DOI: 10.1016/j.freeradbiomed.2011.09.033] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Revised: 09/27/2011] [Accepted: 09/28/2011] [Indexed: 12/20/2022]
Abstract
Polyphenols, which occur both in edible plants and in foodstuff, have been reported to exert a wide range of health effects; however, the mechanism of action of these molecules is not fully understood. One important cellular pathway affected by polyphenols is the activation of the transcription factor Nrf2 via the electrophile response element, which mediates generation of phase 2 detoxifying enzymes. Our study found that Nrf2 nuclear translocation and the activity of NAD(P)H quinone oxidoreductase (NQO1) were increased significantly after treatment of astrocytes with tert-butylhydroquinone (tBHQ), resveratrol, or curcumin, at 20-50μM. Incubation of tBHQ, resveratrol, and curcumin in the growth medium in the absence of astrocytes caused the accumulation of H(2)O(2). Treatment of cells with either glutathione or metmyoglobin was found to decrease Nrf2 translocation and NQO1 activity induced by polyphenols by up to 40 and 60%, respectively. Addition of both glutathione and metmyoglobin to growth medium decreased Nrf2 translocation and NQO1 activity by up to 100 and 80%, respectively. In conclusion, because metmyoglobin, in the presence of polyphenols and glutathione, is known to interact with H(2)O(2), semiquinones, and quinones, the up-regulation of the antioxidant defense of the cells through activation of the Nrf2 transcription factor, paradoxically, occurs via the generation of H(2)O(2) and polyphenol-oxidized species generated from the exogenous microenvironment of the cells.
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Affiliation(s)
- Hilla Erlank
- Department of Food Science, ARO, Volcani Center, Bet-Dagan 50250, Israel
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The effects of oxaloacetate on hydrogen peroxide generation from ascorbate and epigallocatechin gallate in cell culture media: potential for altering cell metabolism. Biochem Biophys Res Commun 2011; 417:446-50. [PMID: 22166196 DOI: 10.1016/j.bbrc.2011.11.136] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 11/25/2011] [Indexed: 01/03/2023]
Abstract
Several phenolic compounds as well as ascorbate can oxidise in certain cell culture media (especially Dulbecco's modified Eagle's medium (DMEM)) to generate hydrogen peroxide. Addition of oxaloacetate decreased the levels of H(2)O(2) detected and the oxaloacetate was depleted. Oxaloacetate was approximately as effective as pyruvate in decreasing H(2)O(2) levels and more effective than α-ketoglutarate. Our data raise important issues to consider when interpreting the behaviour and metabolism of cells in culture (which are both altered by the oxidative stress of cell culture) and their apparent response to addition of autooxidisable compounds such as ascorbate and epigallocatechin gallate.
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RAVICHANDRAN MADHURAM, HETTIARACHCHY NAVAMS, GANESH VIJAYALAKSHMI, RICKE STEVENC, SINGH SURENDRA. ENHANCEMENT OF ANTIMICROBIAL ACTIVITIES OF NATURALLY OCCURRING PHENOLIC COMPOUNDS BY NANOSCALE DELIVERY AGAINST LISTERIA MONOCYTOGENES, ESCHERICHIA COLI O157:H7 AND SALMONELLA TYPHIMURIUM IN BROTH AND CHICKEN MEAT SYSTEM. J Food Saf 2011. [DOI: 10.1111/j.1745-4565.2011.00322.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Thring TS, Hili P, Naughton DP. Antioxidant and potential anti-inflammatory activity of extracts and formulations of white tea, rose, and witch hazel on primary human dermal fibroblast cells. JOURNAL OF INFLAMMATION-LONDON 2011; 8:27. [PMID: 21995704 PMCID: PMC3214789 DOI: 10.1186/1476-9255-8-27] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2011] [Accepted: 10/13/2011] [Indexed: 11/10/2022]
Abstract
BACKGROUND Numerous reports have identified therapeutic roles for plants and their extracts and constituents. The aim of this study was to assess the efficacies of three plant extracts for their potential antioxidant and anti-inflammatory activity in primary human skin fibroblasts. METHODS Aqueous extracts and formulations of white tea, witch hazel and rose were subjected to assays to measure anti-collagenase, anti-elastase, trolox equivalent and catalase activities. Skin fibroblast cells were employed to determine the effect of each extract/formulation on IL-8 release induced by the addition of hydrogen peroxide. Microscopic examination along with Neutral Red viability testing was employed to ascertain the effects of hydrogen peroxide directly on cell viability. RESULTS Considerable anti-collagenase, anti-elastase, and antioxidant activities were measured for all extracts apart from the witch hazel distillate which showed no activity in the collagenase assay or in the trolox equivalence assay. All of the extracts and products tested elicited a significant decrease in the amount of IL-8 produced by fibroblast cells compared to the control (p < 0.05). None of the test samples exhibited catalase activity or had a significant effect on the spontaneous secretion of IL-8 in the control cells which was further corroborated with the microscopy results and the Neutral Red viability test. CONCLUSIONS These data show that the extracts and products tested have a protective effect on fibroblast cells against hydrogen peroxide induced damage. This approach provides a potential method to evaluate the claims made for plant extracts and the products in which these extracts are found.
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Affiliation(s)
- Tamsyn Sa Thring
- School of Life Sciences, Kingston University, London, KT1 2EE, UK.
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Zhou L, Elias RJ. Investigating the hydrogen peroxide quenching capacity of proteins in polyphenol-rich foods. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:8915-8922. [PMID: 21751811 DOI: 10.1021/jf201491k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polyphenols are widely regarded as antioxidants, due in large part to their free radical scavenging activities and their ability to disrupt radical chain propagation. However, recent studies have demonstrated that the oxidation of some polyphenolic compounds, such as the tea-derived compound (-)-epigallocatechin-3-gallate (EGCG), results in the generation of reactive oxygen species that can potentially compromise the oxidative stability of food lipids under some conditions. In this present study, the rate of hydrogen peroxide (H(2)O(2)) generation and its stability, resulting from EGCG oxidation in Tween 80- and sodium caseinate-stabilized oil-in-water (O/W) emulsions in the presence of iron (25 μM Fe(3+) from FeCl(3)), were examined. Observed H(2)O(2) levels in protein-stabilized emulsions were significantly lower across all treatments as compared to surfactant-stabilized emulsions. The lower observed H(2)O(2) concentrations seen in the protein system are likely due to the antioxidant effects of the added proteins, which either prevented the generation of or more likely scavenged the peroxide. All protein-stabilized emulsions containing EGCG showed increases in carbonyl concentrations, a marker of protein oxidation, throughout the study. The H(2)O(2) scavenging activity of aqueous phase and interfacial caseinate and whey protein isolate (WPI) was also evaluated. Both proteins showed concentration-dependent scavenging of H(2)O(2) with caseinate displaying significantly higher scavenging abilities at all concentrations. These results suggest that food proteins may play an important role in mitigating the pro-oxidant effects of polyphenols.
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Affiliation(s)
- Lisa Zhou
- Department of Food Science, College of Agricultural Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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Fabiani R, Sepporta MV, Mazza T, Rosignoli P, Fuccelli R, De Bartolomeo A, Crescimanno M, Taticchi A, Esposto S, Servili M, Morozzi G. Influence of cultivar and concentration of selected phenolic constituents on the in vitro chemiopreventive potential of olive oil extracts. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:8167-8174. [PMID: 21702505 DOI: 10.1021/jf201459u] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
One of the main olive oil phenolic compounds, hydroxytyrosol (3,4-DHPEA), exerts in vitro chemopreventive activities (antiproliferative and pro-apoptotic) on tumor cells through the accumulation of H(2)O(2) in the culture medium. However, the phenol composition of virgin olive oil is complex, and 3,4-DHPEA is present at low concentrations when compared to other secoiridoids. In this study, the in vitro chemopreventive activities of complex virgin olive oil phenolic extracts (VOO-PE, derived from the four Italian cultivars Nocellara del Belice, Coratina, Ogliarola, and Taggiasca) were compared to each other and related to the amount of the single phenolic constituents. A great chemopreventive potential among the different VOO-PE was found following this order: Ogliarola > Coratina > Nocellara > Taggiasca. The antiproliferative and pro-apoptotic activities of VOO-PE were positively correlated to the secoiridoid content and negatively correlated to the concentration of both phenyl alcohols and lignans. All extracts induced H(2)O(2) accumulation in the culture medium, but this phenomenon was not responsible for their pro-apoptotic activity. When tested in a complex mixture, the olive oil phenols exerted a more potent chemopreventive effect compared to the isolated compounds, and this effect could be due either to a synergistic action of components or to any other unidentified extract constituent.
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Affiliation(s)
- Roberto Fabiani
- Dipartimento di Specialità Medico-Chirurgiche e Sanità Pubblica, Sezione di Epidemiologia Molecolare e Igiene e Ambientale, University of Perugia, Perugia, Italy.
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Fabiani R, Sepporta MV, Rosignoli P, De Bartolomeo A, Crescimanno M, Morozzi G. Anti-proliferative and pro-apoptotic activities of hydroxytyrosol on different tumour cells: the role of extracellular production of hydrogen peroxide. Eur J Nutr 2011; 51:455-64. [PMID: 21805082 DOI: 10.1007/s00394-011-0230-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Accepted: 07/15/2011] [Indexed: 11/25/2022]
Abstract
PURPOSE Several recently published data suggest that the anti-proliferative and pro-apoptotic properties of hydroxytyrosol [3,4-dihydroxyphenyl ethanol (3,4-DHPEA)] on HL60 cells may be mediated by the accumulation of hydrogen peroxide (H₂O₂) in the culture medium. The aim of this study was to clarify the role played by H₂O₂ in the chemopreventive activities of 3,4-DHPEA on breast (MDA and MCF-7), prostate (LNCap and PC3) and colon (SW480 and HCT116) cancer cell lines and to investigate the effects of cell culture medium components and the possible mechanisms at the basis of the H₂O₂-producing properties of 3,4-DHPEA. METHODS The proliferation was measured by the MTT assay and the apoptosis by both fluorescence microscopy and flow cytometry. The concentration of H₂O₂ in the culture medium was measured by the ferrous ion oxidation-xylenol orange method. RESULTS It was found that the H₂O₂-inducing ability of 3,4-DHPEA is completely prevented by pyruvate and that the exposure of cells to conditions not supporting the H₂O₂ accumulation (addition of either catalase or pyruvate to the culture medium) inhibited the anti-proliferative effect of 3,4-DHPEA. Accordingly, the sensitivity of the different cell lines to the anti-proliferative effect of 3,4-DHPEA was inversely correlated with their ability to remove H₂O₂ from the culture medium. With regard to the mechanism by which 3,4-DHPEA causes the H₂O₂ accumulation, it was found that superoxide dismutase increased the H₂O₂ production while tyrosinase, slightly acidic pH (6,8) and absence of oxygen (O₂) completely prevented this activity. In addition, different transition metal-chelating compounds did not modify the H₂O₂-producing activity of 3,4-DHPEA. CONCLUSIONS The pro-oxidant activity of 3,4-DHPEA deeply influences its 'in vitro' chemopreventive activities. The main initiation step in the H₂O₂-producing activity is the auto-oxidation of 3,4-DHPEA by O₂ with the formation of the semiquinone, superoxide ions (O₂(-)) and 2H(+).
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Affiliation(s)
- Roberto Fabiani
- Dipartimento di Specialità Medico-Chirurgiche e Sanità Pubblica, Sezione di Epidemiologia Molecolare ed Igiene Ambientale, Università degli Studi di Perugia, Perugia, Italy.
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Esselen M, Boettler U, Teller N, Bachler S, Hutter M, Rufer CE, Skrbek S, Marko D. Anthocyanin-rich blackberry extract suppresses the DNA-damaging properties of topoisomerase I and II poisons in colon carcinoma cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:6966-6973. [PMID: 21599019 DOI: 10.1021/jf200379c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In the present study, we addressed the question whether cyanidin-3-glucoside (C3G) or complex C3G-rich blackberry extracts affect human topoisomerases with special emphasis on the contribution of the potential degradation products phloroglucinol aldehyde (PGA) and protocatechuic acid (PCA). In HT29 colon carcinoma cells a C3G-rich blackberry extract suppressed camptothecin- (CPT-) or doxorubicin- (DOX-) induced stabilization of the covalent DNA-topoisomerase intermediate, thus antagonizing the effects of these classical topoisomerase poisons on DNA integrity. As a single compound, C3G (100 μM) decreased the DNA-damaging effects of CPT as well, but did not significantly affect those induced by DOX. At the highest applied concentration (100 μM), cyanidin protected DNA from CPT- and DOX-induced damage. Earlier reports on DNA-damaging properties of cyanidin were found to result most likely from the formation of hydrogen peroxide as an artifact in the cell culture medium when the incubation was performed in the absence of catalase. The suppression of hydrogen peroxide accumulation, achieved by the addition of catalase, demonstrated that cyanidin does not exhibit DNA-damaging properties in HT29 cells (up to 100 μM). The observed effects on topoisomerase interference and DNA protection against CPT or DOX were clearly limited to the parent compound and were not observed for the potential cyanidin degradation products PGA and PCA.
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Affiliation(s)
- Melanie Esselen
- Technical University of Kaiserslautern , Erwin-Schroedinger-Strasse 52, 67663 Kaiserslautern, Germany
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Research strategies in the study of the pro-oxidant nature of polyphenol nutraceuticals. J Toxicol 2011; 2011:467305. [PMID: 21776260 PMCID: PMC3135211 DOI: 10.1155/2011/467305] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 04/12/2011] [Indexed: 12/13/2022] Open
Abstract
Polyphenols of phytochemicals are thought to exhibit chemopreventive effects against cancer. These plant-derived antioxidant polyphenols have a dual nature, also acting as pro-oxidants, generating reactive oxygen species (ROS), and causing oxidative stress. When studying the overall cytotoxicity of polyphenols, research strategies need to distinguish the cytotoxic component derived from the polyphenol per se from that derived from the generated ROS. Such strategies include (a) identifying hallmarks of oxidative damage, such as depletion of intracellular glutathione and lipid peroxidation, (b) classical manipulations, such as polyphenol exposures in the absence and presence of antioxidant enzymes (i.e., catalase and superoxide dismutase) and of antioxidants (e.g., glutathione and N-acetylcysteine) and cotreatments with glutathione depleters, and (c) more recent manipulations, such as divalent cobalt and pyruvate to scavenge ROS. Attention also must be directed to the influence of iron and copper ions and to the level of polyphenols, which mediate oxidative stress.
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Boettler U, Sommerfeld K, Volz N, Pahlke G, Teller N, Somoza V, Lang R, Hofmann T, Marko D. Coffee constituents as modulators of Nrf2 nuclear translocation and ARE (EpRE)-dependent gene expression. J Nutr Biochem 2011; 22:426-40. [DOI: 10.1016/j.jnutbio.2010.03.011] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Revised: 03/16/2010] [Accepted: 03/29/2010] [Indexed: 10/19/2022]
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Waisundara VY, Siu SY, Hsu A, Huang D, Tan BKH. Baicalin upregulates the genetic expression of antioxidant enzymes in Type-2 diabetic Goto-Kakizaki rats. Life Sci 2011; 88:1016-25. [PMID: 21439975 DOI: 10.1016/j.lfs.2011.03.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 02/15/2011] [Accepted: 03/10/2011] [Indexed: 12/17/2022]
Abstract
AIM The primary purpose of this study was to characterize and investigate the antioxidant and anti-diabetic activities of the flavonoid baicalin in type 2 diabetic Goto-Kakizaki rats. MAIN METHODS Four groups of Goto-Kakizaki rats (n=6) were subjected to the following oral treatments for 30 days: (1) metformin - 500 mg/kg (2) baicalin - 120 mg/kg (3) metformin 500 mg/kg and baicalin - 120 mg/kg (4) vehicle treated diabetic controls receiving distilled water. The plasma glucose, triglyceride, total cholesterol, lipid peroxide and protein carbonyl contents were measured on a weekly basis. Following the completion of the treatment, the rats were sacrificed and their blood, heart, pancreatic and hepatic tissues were collected for analysis. The antioxidant enzyme activities as well as their expression were quantified using Western Blot, microarray and RT-PCR. KEY FINDINGS The respective analyses showed that the baicalin- and the metformin and baicalin-treated groups had statistically significant increases (p <0.05) in the activity and expression of the antioxidant enzymes (superoxide dismutase, catalase and glutathione peroxidase) compared with vehicle- and metformin-treated groups. Further complementing the antioxidant enzyme activity increases, the oxidative stress markers of plasma lipid peroxide and protein carbonyl contents were reduced in these groups as well. These treatment groups also had reduced plasma total cholesterol and triglyceride levels compared with vehicle-treated and metformin-treated groups (p <0.05). SIGNIFICANCE Baicalin was an efficient antioxidant in reducing hyperglycemia-induced oxidative stress through the increased expression of antioxidant enzyme activities. It was also an efficient anti-hypertriglyceridemic as well as anti-hypercholesterolemic agent compared with metformin.
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Fabiani R, Rosignoli P, De Bartolomeo A, Fuccelli R, Servili M, Morozzi G. The production of hydrogen peroxide is not a common mechanism by which olive oil phenols induce apoptosis on HL60 cells. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.10.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rasool MK, Sabina EP, Ramya SR, Preety P, Patel S, Mandal N, Mishra PP, Samuel J. Hepatoprotective and antioxidant effects of gallic acid in paracetamol-induced liver damage in mice. J Pharm Pharmacol 2011; 62:638-43. [PMID: 20609067 DOI: 10.1211/jpp.62.05.0012] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVES The aim of this research paper was to investigate the hepatoprotective and antioxidant effects of gallic acid in paracetamol-induced liver damage in mice. METHODS In the present study, the hepatoprotective and antioxidant effects of gallic acid were evaluated against paracetamol-induced hepatotoxicity in mice and compared with the silymarin, a standard hepatoprotective drug. The mice received a single dose of paracetamol (900 mg/kg body weight i.p.). Gallic acid (100 mg/kg body weight i.p.) and silymarin (25 mg/kg body weight i.p.) were administered 30 min after the injection of paracetamol. After 4 h, liver marker enzymes (aspartate transaminase, alanine transaminase and alkaline phosphatase) and inflammatory mediator tumour necrosis factor-alpha (TNF-alpha) were estimated in serum, while the lipid peroxidation and antioxidant status (superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione-S-transferase and glutathione) were determined in liver homogenate of the control and experimental mice. KEY FINDINGS Increased activities of liver marker enzymes and elevated TNF-alpha and lipid peroxidation levels were observed in mice exposed to paracetamol (P < 0.05), whereas the antioxidant status was found to be depleted (P < 0.05) when compared with the control group. However gallic acid treatment (100 mg/kg body weight i.p.) significantly reverses (P < 0.05) the above changes by its antioxidant action compared to the control group as observed in the paracetamol-challenged mice. CONCLUSIONS The results clearly demonstrate that gallic acid possesses promising hepatoprotective effects.
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Long LH, Halliwell B. Artefacts in cell culture: α-Ketoglutarate can scavenge hydrogen peroxide generated by ascorbate and epigallocatechin gallate in cell culture media. Biochem Biophys Res Commun 2011; 406:20-4. [PMID: 21281600 DOI: 10.1016/j.bbrc.2011.01.091] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Accepted: 01/25/2011] [Indexed: 12/20/2022]
Abstract
Ascorbate and several phenolic compounds readily oxidise in cell culture media to generate hydrogen peroxide. However, addition of α-ketoglutarate, which is known to be released by several cell types, decreased the levels of H(2)O(2), and the α-ketoglutarate was depleted and converted to succinate. These observations could account for previous reports of the protective effects of α-ketoglutarate in promoting the growth of cells in culture, and may contribute to explaining some of the variability in the literature in reported rates of H(2)O(2) production from autoxidisable compounds in cell culture systems.
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Affiliation(s)
- Lee Hua Long
- Department of Biochemistry, National University of Singapore, Singapore
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Bakuradze T, Lang R, Hofmann T, Stiebitz H, Bytof G, Lantz I, Baum M, Eisenbrand G, Janzowski C. Antioxidant effectiveness of coffee extracts and selected constituents in cell-free systems and human colon cell lines. Mol Nutr Food Res 2010; 54:1734-43. [DOI: 10.1002/mnfr.201000147] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Mari A, Tedesco I, Nappo A, Russo GL, Malorni A, Carbone V. Phenolic compound characterisation and antiproliferative activity of “Annurca” apple, a southern Italian cultivar. Food Chem 2010. [DOI: 10.1016/j.foodchem.2010.04.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Long LH, Hoi A, Halliwell B. Instability of, and generation of hydrogen peroxide by, phenolic compounds in cell culture media. Arch Biochem Biophys 2010; 501:162-9. [PMID: 20558131 DOI: 10.1016/j.abb.2010.06.012] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 05/26/2010] [Accepted: 06/09/2010] [Indexed: 12/13/2022]
Abstract
Many papers in the literature have described complex effects of flavonoids and other polyphenols on cells in culture. In this paper we show that hydroxytyrosol, delphinidin chloride and rosmarinic acid are unstable in three commonly-used cell culture media (Dulbecco's modified Eagle's medium (DMEM), RPMI 1640 (RPMI) and Minimal Essential Medium Eagle (MEM)) and undergo rapid oxidation to generate H2O2. This may have confounded some previous studies on the cellular effects of these compounds. By contrast, apigenin, curcumin, hesperetin, naringenin, resveratrol and tyrosol did not generate significant H2O2 levels in these media. Nevertheless, curcumin and, to a lesser extent, resveratrol (but not tyrosol) were also unstable in DMEM, so the absence of detectable H2O2 production by a compound in cell culture media should not be equated to stability of that compound. Compound instability and generation of H2O2 must be taken into account in interpreting effects of phenolic compounds on cells in culture.
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Affiliation(s)
- Lee Hua Long
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Zikri NN, Riedl KM, Wang LS, Lechner J, Schwartz SJ, Stoner GD. Black raspberry components inhibit proliferation, induce apoptosis, and modulate gene expression in rat esophageal epithelial cells. Nutr Cancer 2010; 61:816-26. [PMID: 20155622 DOI: 10.1080/01635580903285148] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We have shown that a diet containing freeze-dried black raspberries (BRB) inhibits the development of chemically induced cancer in the rat esophagus. To provide insights into possible mechanisms by which BRB inhibit esophageal carcinogenesis, we evaluated an ethanol (EtOH) extract of BRB, and two component anthocyanins (cyanidin-3-O-glucoside and cyanidin-3-O-rutinoside) in BRB, for their effects on growth, apoptosis, and gene expression in rat esophageal epithelial cell lines. The EtOH extract and both anthocyanins selectively caused significant growth inhibition and induction of apoptosis in a highly tumorigenic cell line (RE-149 DHD) but not in a weakly tumorigenic line (RE-149). The uptake of anthocyanins from the EtOH extract into RE-149 DHD cells far exceeded their uptake into RE-149 cells, which may have accounted for the selective effects of the extract on growth and apoptosis of RE-149 DHD cells. The growth inhibitory and proapoptotic effects were enhanced by the daily addition of the EtOH extract and the anthocyanins to the medium. Interestingly, the EtOH extract did not alter cyclooxygenase-2 (COX-2) and nitric oxide synthase (i-NOS) expression in RE-149 DHD cells, whereas both anthocyanins downregulated the expressions of these genes. This differential effect may have been related to the relative amounts of anthocyanins in the extract vs. when they were added individually to the medium. We conclude that the selective effects of the EtOH extract on growth and apoptosis of highly tumorigenic rat esophageal epithelial cells in vitro may be due to preferential uptake and retention of its component anthocyanins, and this may also be responsible for the greater inhibitory effects of freeze-dried whole berries on tumor cells in vivo.
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Affiliation(s)
- Nancy N Zikri
- The Ohio State University, Columbus, Ohio 43240, USA
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Adams LS, Phung S, Yee N, Seeram NP, Li L, Chen S. Blueberry phytochemicals inhibit growth and metastatic potential of MDA-MB-231 breast cancer cells through modulation of the phosphatidylinositol 3-kinase pathway. Cancer Res 2010; 70:3594-605. [PMID: 20388778 DOI: 10.1158/0008-5472.can-09-3565] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Dietary phytochemicals are known to exhibit a variety of anticarcinogenic properties. This study investigated the chemopreventive activity of blueberry extract in triple-negative breast cancer cell lines in vitro and in vivo. Blueberry decreased cell proliferation in HCC38, HCC1937, and MDA-MB-231 cells with no effect on the nontumorigenic MCF-10A cell line. Decreased metastatic potential of MDA-MB-231 cells by blueberry was shown through inhibition of cell motility using wound-healing assays and migration through a polyethylene terephthalate membrane. Blueberry treatment decreased the activity of matrix metalloproteinase-9 and the secretion of urokinase-type plasminogen activator while increasing tissue inhibitor of metalloproteinase-1 and plasminogen activator inhibitor-1 secretion in MDA-MB-231 conditioned medium as shown by Western blotting. Cell signaling pathways that control the expression/activation of these processes were investigated via Western blotting and reporter gene assay. Treatment with blueberry decreased phosphatidylinositol 3-kinase (PI3K)/AKT and NFkappaB activation in MDA-MB-231 cells, where protein kinase C and extracellular signal-regulated kinase (ERK) were not affected. In vivo, the efficacy of blueberry to inhibit triple-negative breast tumor growth was evaluated using the MDA-MB-231 xenograft model. Tumor weight and proliferation (Ki-67 expression) were decreased in blueberry-treated mice, where apoptosis (caspase-3 expression) was increased compared with controls. Immunohistochemical analysis of tumors from blueberry-fed mice showed decreased activation of AKT and p65 NFkappaB signaling proteins with no effect on the phosphorylation of ERK. These data illustrate the inhibitory effect of blueberry phytochemicals on the growth and metastatic potential of MDA-MB-231 cells through modulation of the PI3K/AKT/NFkappaB pathway.
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Affiliation(s)
- Lynn S Adams
- Division of Tumor Cell Biology, Beckman Research Institute of the City of Hope, Duarte, California 91010, USA
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D'Angelo S, Morana A, Salvatore A, Zappia V, Galletti P. Protective effect of polyphenols from Glycyrrhiza glabra against oxidative stress in Caco-2 cells. J Med Food 2010; 12:1326-33. [PMID: 20041789 DOI: 10.1089/jmf.2008.0285] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In the present article, we have investigated the antioxidant properties of methanolic liquorice polyphenol extracts (LPE(s)). Polyphenol extraction was performed with 60% and 100% methanol. Analysis of LPE(s) by thin-layer chromatography revealed that a higher amount of polyphenols was recovered by extraction with 60% methanol. Antioxidant activity measurement of the reducing power, scavenging effect on 2,2'-diphenyl-1-picrylhydrazyl free radical, and hydrogen peroxide scavenging capability have been taken as the parameters for assessment of antioxidant potential of LPE(s). Results have been compared with both natural and synthetic antioxidants. All experimental data have indicated that LPE(s) possess strong antioxidant power proportional to their o-diphenolic and total polyphenolic content, independently from the assay used. Therefore, the LPE(s) antioxidant property was examined against the cytotoxic effects of reactive oxygen species in human colon carcinoma cells. Pretreatment of Caco-2 cells with liquorice polyphenolic extracts provided a remarkable protection against oxidative damage induced by H(2)O(2). The highest oxidative stress protection (72% of cell vitality) was measured in cells pretreated with 0.54 mM polyphenols. This effect seems to be associated to the antioxidant activity of liquorice polyphenolic compounds. Our data suggest that polyphenols from Glycyrrhiza glabra could exert a beneficial action in the prevention of intestinal pathologies related to production of reactive oxygen species.
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Medicinal plants and antioxidants: What do we learn from cell culture and Caenorhabditis elegans studies? Biochem Biophys Res Commun 2010; 394:1-5. [DOI: 10.1016/j.bbrc.2010.02.137] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 02/22/2010] [Indexed: 11/21/2022]
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Teller N, Thiele W, Boettler U, Sleeman J, Marko D. Delphinidin inhibits a broad spectrum of receptor tyrosine kinases of the ErbB and VEGFR family. Mol Nutr Food Res 2009; 53:1075-83. [PMID: 19653223 DOI: 10.1002/mnfr.200800524] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Delphinidin has been reported to inhibit EGFR signalling. To determine whether other receptor tyrosine kinases (RTKs) are also influenced by delphinidin, we examined its ability to inhibit the kinase activity of EGFR, ErbB2, VEGFR-2, VEGFR-3 and IGF1R in a cell-free test system. We found that delphinidin strongly inhibited the protein tyrosine kinase activity of all tested RTKs at low micromolar concentrations. In A431 and PAE cells, ligand-induced phosphorylation of the receptors was also potently suppressed, with a preference for the suppression of the activity of ErbB3 (IC(50) approximately 100 nM) and VEGFR-3 (IC(50) < 50 microM). Thus the inhibition of RTKs by delphinidin is not limited to cell-free assays but is also of relevance in the cellular context. The results indicate that delphinidin acts as a broad-spectrum inhibitor of RTKs. Given the crucial role of the receptors in tumour growth and metastasis, we conclude that delphinidin has the potential to act directly against tumour cells as well as to interfere with key tumour-host interactions, although the suitability of delphinidin as a drug in cancer management may be compromised by its limited stability. Nevertheless, delphinidin may represent a novel lead compound for the development of chemopreventative and chemotherapeutic intervention strategies.
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Affiliation(s)
- Nicole Teller
- University of Vienna, Institute of Analytical and Food Chemistry, Vienna, Austria
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Bellion P, Olk M, Will F, Dietrich H, Baum M, Eisenbrand G, Janzowski C. Formation of hydrogen peroxide in cell culture media by apple polyphenols and its effect on antioxidant biomarkers in the colon cell line HT-29. Mol Nutr Food Res 2009; 53:1226-36. [DOI: 10.1002/mnfr.200800456] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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42
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Petermann A, Miene C, Schulz-Raffelt G, Palige K, Hölzer J, Glei M, Böhmer FD. GSTT2, a phase II gene induced by apple polyphenols, protects colon epithelial cells against genotoxic damage. Mol Nutr Food Res 2009; 53:1245-53. [DOI: 10.1002/mnfr.200900110] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Long LH, Halliwell B. Artefacts in cell culture: pyruvate as a scavenger of hydrogen peroxide generated by ascorbate or epigallocatechin gallate in cell culture media. Biochem Biophys Res Commun 2009; 388:700-4. [PMID: 19695227 DOI: 10.1016/j.bbrc.2009.08.069] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2009] [Accepted: 08/12/2009] [Indexed: 10/20/2022]
Abstract
Ascorbate and several phenolic compounds readily oxidise in cell culture media to generate hydrogen peroxide. However, media containing pyruvate showed much less H(2)O(2) production, apparently because pyruvate can scavenge H(2)O(2) in the medium. Researchers must be aware that compounds under test can sometimes readily oxidise in cell culture media, that this might not be detected by measurement of H(2)O(2) if the media contain pyruvate, and that pyruvate can be substantially depleted in the media as a result.
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Affiliation(s)
- Lee Hua Long
- Department of Biochemistry, National University of Singapore, Singapore
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Kang MK, Kang NJ, Jang YJ, Lee KW, Lee HJ. Gallic Acid Induces Neuronal Cell Death through Activation of c-Jun N-Terminal Kinase and Downregulation of Bcl-2. Ann N Y Acad Sci 2009; 1171:514-20. [DOI: 10.1111/j.1749-6632.2009.04728.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dai J, Gupte A, Gates L, Mumper R. A comprehensive study of anthocyanin-containing extracts from selected blackberry cultivars: Extraction methods, stability, anticancer properties and mechanisms. Food Chem Toxicol 2009; 47:837-47. [DOI: 10.1016/j.fct.2009.01.016] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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46
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Kim JH, Lee BK, Lee KW, Lee HJ. Resveratrol counteracts gallic acid-induced down-regulation of gap-junction intercellular communication. J Nutr Biochem 2009; 20:149-54. [DOI: 10.1016/j.jnutbio.2008.01.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2007] [Revised: 12/31/2007] [Accepted: 01/10/2008] [Indexed: 11/16/2022]
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47
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Babich H, Liebling EJ, Burger RF, Zuckerbraun HL, Schuck AG. Choice of DMEM, formulated with or without pyruvate, plays an important role in assessing the in vitro cytotoxicity of oxidants and prooxidant nutraceuticals. In Vitro Cell Dev Biol Anim 2009; 45:226-33. [DOI: 10.1007/s11626-008-9168-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2008] [Accepted: 12/16/2008] [Indexed: 01/23/2023]
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48
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Bellion P, Hofmann T, Pool-Zobel BL, Will F, Dietrich H, Knaup B, Richling E, Baum M, Eisenbrand G, Janzowski C. Antioxidant effectiveness of phenolic apple juice extracts and their gut fermentation products in the human colon carcinoma cell line caco-2. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:6310-6317. [PMID: 18624411 DOI: 10.1021/jf8005068] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Apples represent a major dietary source of antioxidative polyphenols. Their metabolic conversion by the gut microflora might generate products that protect the intestine against oxidative damage. We studied the antioxidant effectiveness of supernatants of fermented apple juice extracts (F-AEs, 6 and 24 h fermentation) and of selected phenolic degradation products, identified by HPLC-DAD-ESI-MS. Cell free antioxidant capacity of unfermented apple juice extracts (AEs) was decreased after fermentation by 30-50%. In the human colon carcinoma cell line Caco-2, F-AEs (containing <0.5% of original AE-phenolics) decreased the reactive oxygen species (ROS) level more efficiently than the F-blank (fermented without AE) but were less effective than the respective AEs. Similarly, antioxidant effectiveness of individual degradation products was lower compared to respective AE constituents. Glutathione level was slightly increased and oxidative DNA damage slightly decreased by fermented AE03, rich in quercetin glycosides. In conclusion, F-AEs/degradation products exhibit antioxidant activity in colon cells but to a lesser extent than the respective unfermented AEs/constituents.
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Affiliation(s)
- Phillip Bellion
- Division of Food Chemistry and Toxicology, Department of Chemistry, University of Kaiserslautern, Erwin-Schroedinger-Str. 52, D-67663 Kaiserslautern, Germany
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Halliwell B. Are polyphenols antioxidants or pro-oxidants? What do we learn from cell culture and in vivo studies? Arch Biochem Biophys 2008; 476:107-12. [DOI: 10.1016/j.abb.2008.01.028] [Citation(s) in RCA: 527] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 12/26/2007] [Accepted: 01/29/2008] [Indexed: 12/17/2022]
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Abstract
Plants are chemical storehouses, a fact which has driven countless multidisciplinary quests for bioactive compounds. As the very first step of botanical research, the whole desire is to find "hit" plants with specific bioactivities. It is logical to use some strategies that can maximize the chances of finding these "hits" with limited time and resources. In addition to selecting the right plants for screening, how the plant extracts are prepared can also influence the bioactivity screening outcomes. An extract from the same plant material can be quite different in chemical composition having different preparations. Because of the complex mixture nature of plant extracts, it is possible artifact activities may be observed. Thus confirmatory activity tests are often necessary to warrant the next laborious isolation step. A bioassay directed isolation approach may be the most efficient in identifying the bioactive compounds because of the narrowed focus at each isolation step, but a phytochemistry isolation approach is appropriate to characterize a purified bioactive extract. In fact, these two approaches can be taken intermittently whenever efficiency can be improved. Finally, use of the identified active compounds is now broader. In addition to determining a lead compound to continue a drug development path, there is an increasing interest in support for the use of botanical extracts as botanical drugs. Instead of dropping the extract after extracting the lead compound, the natural analogues representing the purified extract now have a chance to become leading compounds in the pursuit of novel therapies for metabolic syndrome and other diseases.
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Affiliation(s)
- Zhijun Liu
- School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
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