251
|
The protective role of olive oil hydroxytyrosol against oxidative alterations induced by mercury in human erythrocytes. Food Chem Toxicol 2015; 82:59-63. [PMID: 25957742 DOI: 10.1016/j.fct.2015.04.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/09/2015] [Accepted: 04/28/2015] [Indexed: 12/23/2022]
Abstract
Hydroxytyrosol (HT) is a phenolic antioxidant naturally occurring in virgin olive oil. In this study, we investigated the possible protective effects of HT on the oxidative and morphological alterations induced by mercury (Hg) in intact human erythrocytes. These cells preferentially accumulate this toxic heavy metal. More importantly, Hg-induced echinocyte formation correlates with increased coagulability of these cells. Our results indicate that HT treatment (10-50 µM) prevents the increase in hemolysis and Reactive Oxygen Species (ROS) generation induced by exposure of cells to micromolar HgCl2 concentrations as well as the decrease in GSH intracellular levels. Moreover, as indicated by scanning electron microscopy, the morphological alterations are also significantly reduced by HT co-treatment. Taken together our data provide the first experimental evidence that HT has the potential to counteract mercury toxicity. The reported effect may be regarded as an additional mechanism underlying the beneficial cardio-protective effects of this dietary antioxidant, also endowed with significant anti-atherogenic and anti-inflammatory properties.
Collapse
|
252
|
Peters W, Kusche-Vihrog K, Oberleithner H, Schillers H. Cystic fibrosis transmembrane conductance regulator is involved in polyphenol-induced swelling of the endothelial glycocalyx. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:1521-30. [PMID: 25881741 DOI: 10.1016/j.nano.2015.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/15/2015] [Accepted: 03/23/2015] [Indexed: 12/21/2022]
Abstract
UNLABELLED Previous studies show that polyphenol-rich compounds can induce a swelling of the endothelial glycocalyx (eGC). Our goal was to reveal the mechanism behind the eGC-swelling. As polyphenols are potent modulators of fibrosis transmembrane conductance regulator (CFTR) Cl(-) channel, the hypothesis was tested whether polyphenol-induced increase in CFTR activity is responsible for the eGC-swelling. The impact of the polyphenols resveratrol, (-)-epicatechin, and quercetin on nanomechanics of living endothelial GM7373 cells was monitored by AFM-nanoindentation. The tested polyphenols lead to eGC-swelling with a simultaneous decrease in cortical stiffness. EGC-swelling, but not the change in cortical stiffness, was prevented by the inhibition of CFTR. Polyphenol-induced eGC-swelling could be mimicked by cytochalasin D, an actin-depolymerizing agent. Thus, in the vascular endothelium, polyphenols induce eGC-swelling by softening cortical actin and activating CFTR. Our findings imply that CFTR plays an important role in the maintenance of vascular homeostasis and may explain the vasoprotective properties of polyphenols. FROM THE CLINICAL EDITOR Many vascular problems clinically can be attributed to a dysregulation of endothelial glycocalyx (eGC). The underlying mechanism however remains unclear. In this article, the authors used nanoindentation and showed that polyphenols could swell the endothelial glycocalyx and alter its function. This investigative method can lead to further mechanistic studies of other molecular pathways.
Collapse
Affiliation(s)
- Wladimir Peters
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | | | - Hermann Schillers
- Institute of Physiology II, University of Münster, Münster, Germany.
| |
Collapse
|
253
|
The protective effect of lipoic acid on selected cardiovascular diseases caused by age-related oxidative stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:313021. [PMID: 25949771 PMCID: PMC4407629 DOI: 10.1155/2015/313021] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 03/16/2015] [Accepted: 03/25/2015] [Indexed: 12/18/2022]
Abstract
Oxidative stress is considered to be the primary cause of many cardiovascular diseases, including endothelial dysfunction in atherosclerosis and ischemic heart disease, hypertension, and heart failure. Oxidative stress increases during the aging process, resulting in either increased reactive oxygen species (ROS) production or decreased antioxidant defense. The increase in the incidence of cardiovascular disease is directly related to age. Aging is also associated with oxidative stress, which in turn leads to accelerated cellular senescence and organ dysfunction. Antioxidants may help lower the incidence of some pathologies of cardiovascular diseases and have antiaging properties. Lipoic acid (LA) is a natural antioxidant which is believed to have a beneficial effect on oxidative stress parameters in relation to diseases of the cardiovascular system.
Collapse
|
254
|
Sanna V, Lubinu G, Madau P, Pala N, Nurra S, Mariani A, Sechi M. Polymeric nanoparticles encapsulating white tea extract for nutraceutical application. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:2026-2032. [PMID: 25599125 DOI: 10.1021/jf505850q] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
With the aim to obtain controlled release and to preserve the antioxidant activity of the polyphenols, nanoencapsulation of white tea extract into polymeric nanoparticles (NPs) based on poly(ε-caprolactone) (PCL) and alginate was successfully performed. NPs were prepared by nanoprecipitation method and were characterized in terms of morphology and chemical properties. Total polyphenols and catechins contents before and after encapsulation were determined. Moreover, in vitro release profiles of encapsulated polyphenols from NPs were investigated in simulated gastrointestinal fluids. The antioxidant activity and stability of encapsulated extract were further evaluated. Interestingly, NPs released 20% of the polyphenols in simulated gastric medium, and 80% after 5 h at pH 7.4, showing a good capacity to control the polyphenols delivery. Furthermore, DPPH(•) assay confirmed that white tea extract retained its antioxidant activity and NPs protected tea polyphenols from degradation, thus opening new perspectives for the exploitation of white tea extract-loaded NPs for nutraceutical applications.
Collapse
Affiliation(s)
- Vanna Sanna
- Department of Chemistry and Pharmacy, University of Sassari , Via Vienna 2, 07100 Sassari, Italy
| | | | | | | | | | | | | |
Collapse
|
255
|
Dietary polyphenols in prevention and treatment of prostate cancer. Int J Mol Sci 2015; 16:3350-76. [PMID: 25654230 PMCID: PMC4346900 DOI: 10.3390/ijms16023350] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 01/21/2015] [Accepted: 01/26/2015] [Indexed: 02/06/2023] Open
Abstract
Prostate cancer is the most prevalent disease affecting males in many Western countries, with an estimated 29,480 deaths in 2014 in the US alone. Incidence rates for prostate cancer deaths have been decreasing since the early 1990s in men of all races/ethnicities, though they remain about 60% higher in African Americans than in any other group. The relationship between dietary polyphenols and the prevention of prostate cancer has been examined previously. Although results are sometimes inconsistent and variable, there is a general agreement that polyphenols hold great promise for the future management of prostate cancer. Various dietary components, including polyphenols, have been shown to possess anti-cancer properties. Generally considered as non-toxic, dietary polyphenols act as key modulators of signaling pathways and are therefore considered ideal chemopreventive agents. Besides possessing various anti-tumor properties, dietary polyphenols also contribute to epigenetic changes associated with the fate of cancer cells and have emerged as potential drugs for therapeutic intervention. Polyphenols have also been shown to affect post-translational modifications and microRNA expressions. This article provides a systematic review of the health benefits of selected dietary polyphenols in prostate cancer, especially focusing on the subclasses of polyphenols, which have a great effect on disease prevention and treatment.
Collapse
|
256
|
Adji Andov L, Karapandzova M, Jovanova B, Stefkov G, Cvetkovikj Karanfilova I, Kadifkova Panovska T, Kulevanova S. Antioxidative potential of Chenopodium botrys L. (Amaranthaceae). MAKEDONSKO FARMACEVTSKI BILTEN 2015. [DOI: 10.33320/maced.pharm.bull.2015.61.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Evaluation of the antioxidant potential of methanol extract of Chenopodium botrys L. (Amaranthaceae) collected from six different locations in Republic of Macedonia was performed. Several methods were used for testing the antioxidative activity: 1) 2,2-diphenyl1-picrylhydrazyl (DPPH) radical scavenging assay, 2) ferric reduction power assay (FRAP), 3) inhibition of H2 O2 activity, 4) non-sitespecific hydroxyl radical-catalyzed 2-deoxy-D-ribose degradation (NSSOH) and 5) site-specific hydroxyl radical-catalyzed 2-deoxy-D-ribose degradation (SSOH). The IC50 values ranged from 0.26-3.10 mg/mL, 3.01-12.71 mg/mL and 2.60-12.29 mg/mL, for DPPH, NSSOH and SSOH assays, respectively. The H2 O2 inhibition activity and the ferric reducing power capacity were from 28.84-46.56% and 26.14- 43.40%, respectively. The obtained data establish the antioxidant potency in concentration-dependent manner. Additionally, total phenols (TPC) and total flavonoid content (TFC) were determined. The estimated values ranged from 27.77-71.25 mg GAE/g DW and from 7.35- 16.33 mg QE/g DW, respectively
Collapse
|
257
|
Sun Y, Hu X, Hu G, Xu C, Jiang H. Curcumin Attenuates Hydrogen Peroxide-Induced Premature Senescence via the Activation of SIRT1 in Human Umbilical Vein Endothelial Cells. Biol Pharm Bull 2015; 38:1134-41. [DOI: 10.1248/bpb.b15-00012] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yueliu Sun
- Department of Cardiology, Renmin Hospital of Wuhan University
| | - Xiaorong Hu
- Department of Cardiology, Renmin Hospital of Wuhan University
| | - Gangying Hu
- Department of Cardiology, Renmin Hospital of Wuhan University
| | - Changwu Xu
- Department of Cardiology, Renmin Hospital of Wuhan University
| | - Hong Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University
| |
Collapse
|
258
|
Role of ROS Production and Turnover in the Antioxidant Activity of Taurine. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 803:581-96. [PMID: 25833529 DOI: 10.1007/978-3-319-15126-7_47] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
259
|
Li AN, Li S, Zhang YJ, Xu XR, Chen YM, Li HB. Resources and biological activities of natural polyphenols. Nutrients 2014; 6:6020-47. [PMID: 25533011 PMCID: PMC4277013 DOI: 10.3390/nu6126020] [Citation(s) in RCA: 481] [Impact Index Per Article: 48.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 02/07/2023] Open
Abstract
The oxidative stress imposed by reactive oxygen species (ROS) plays an important role in many chronic and degenerative diseases. As an important category of phytochemicals, phenolic compounds universally exist in plants, and have been considered to have high antioxidant ability and free radical scavenging capacity, with the mechanism of inhibiting the enzymes responsible for ROS production and reducing highly oxidized ROS. Therefore, phenolic compounds have attracted increasing attention as potential agents for preventing and treating many oxidative stress-related diseases, such as cardiovascular diseases, cancer, ageing, diabetes mellitus and neurodegenerative diseases. This review summarizes current knowledge of natural polyphenols, including resource, bioactivities, bioavailability and potential toxicity.
Collapse
Affiliation(s)
- An-Na Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Sha Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Yu-Jie Zhang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Xiang-Rong Xu
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| | - Yu-Ming Chen
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| |
Collapse
|
260
|
Leong DJ, Choudhury M, Hanstein R, Hirsh DM, Kim SJ, Majeska RJ, Schaffler MB, Hardin JA, Spray DC, Goldring MB, Cobelli NJ, Sun HB. Green tea polyphenol treatment is chondroprotective, anti-inflammatory and palliative in a mouse post-traumatic osteoarthritis model. Arthritis Res Ther 2014; 16:508. [PMID: 25516005 PMCID: PMC4342891 DOI: 10.1186/s13075-014-0508-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 12/09/2014] [Indexed: 12/20/2022] Open
Abstract
Introduction Epigallocatechin 3-gallate (EGCG), a polyphenol present in green tea, was shown to exert chondroprotective effects in vitro. In this study, we used a posttraumatic osteoarthritis (OA) mouse model to test whether EGCG could slow the progression of OA and relieve OA-associated pain. Methods C57BL/6 mice were subjected to surgical destabilization of the medial meniscus (DMM) or sham surgery. EGCG (25 mg/kg) or vehicle control was administered daily for 4 or 8 weeks by intraperitoneal injection starting on the day of surgery. OA severity was evaluated using Safranin O staining and Osteoarthritis Research Society International (OARSI) scores, as well as by immunohistochemical analysis to detect cleaved aggrecan and type II collagen and expression of proteolytic enzymes matrix metalloproteinase 13 (MMP-13) and A disintegrin and metalloproteinase with thrombospondin motifs 5 (ADAMTS5). Real-time PCR was performed to characterize the expression of genes critical for articular cartilage homeostasis. During the course of the experiments, tactile sensitivity testing (von Frey test) and open-field assays were used to evaluate pain behaviors associated with OA, and expression of pain expression markers and inflammatory cytokines in the dorsal root ganglion (DRG) was determined by real-time PCR. Results Four and eight weeks after DMM surgery, the cartilage in EGCG-treated mice exhibited less Safranin O loss and cartilage erosion, as well as lower OARSI scores compared to vehicle-treated controls, which was associated with reduced staining for aggrecan and type II collagen cleavage epitopes, and reduced staining for MMP-13 and ADAMTS5 in the articular cartilage. Articular cartilage in the EGCG-treated mice also exhibited reduced levels of Mmp1, Mmp3, Mmp8, Mmp13,Adamts5, interleukin 1 beta (Il1b) and tumor necrosis factor alpha (Tnfa) mRNA and elevated gene expression of the MMP regulator Cbp/p300 interacting transactivator 2 (Cited2). Compared to vehicle controls, mice treated with EGCG exhibited reduced OA-associated pain, as indicated by higher locomotor behavior (that is, distance traveled). Moreover, expression of the chemokine receptor Ccr2 and proinflammatory cytokines Il1b and Tnfa in the DRG were significantly reduced to levels similar to those of sham-operated animals. Conclusions This study provides the first evidence in an OA animal model that EGCG significantly slows OA disease progression and exerts a palliative effect. Electronic supplementary material The online version of this article (doi:10.1186/s13075-014-0508-y) contains supplementary material, which is available to authorized users.
Collapse
|
261
|
Balasubramani SP, Mohan J, Chatterjee A, Patnaik E, Kukkupuni SK, Nongthomba U, Venkatasubramanian P. Pomegranate Juice Enhances Healthy Lifespan in Drosophila melanogaster: An Exploratory Study. Front Public Health 2014; 2:245. [PMID: 25566518 PMCID: PMC4267107 DOI: 10.3389/fpubh.2014.00245] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 11/05/2014] [Indexed: 12/21/2022] Open
Abstract
Exploring innovative ways to ensure healthy aging of populations is a pre-requisite to contain rising healthcare costs. Scientific research into the principles and practices of traditional medicines can provide new insights and simple solutions to lead a healthy life. Rasayana is a dedicated branch of Ayurveda (an Indian medicine) that deals with methods to increase vitality and delay aging through the use of diet, herbal supplements, and other lifestyle practices. The life-span and health-span enhancing actions of the fruits of pomegranate (Punica granatum L.), a well-known Rasayana, were tested on Drosophila melanogaster (fruitfly) model. Supplementation of standard corn meal with 10% (v/v) pomegranate juice (PJ) extended the life-span of male and female flies by 18 and 8%, respectively. When male and female flies were mixed and reared together, there was 19% increase in the longevity of PJ fed flies, as assessed by MSD, the median survival day (24.8). MSD for control and resveratrol (RV) groups was at 20.8 and 23.1 days, respectively. A two-fold enhancement in fecundity, improved resistance to oxidative stress (H2O2 and paraquat induced) and to Candida albicans infection were observed in PJ fed flies. Further, the flies in the PJ fed group were physically active over an extended period of time, as assessed by the climbing assay. PJ thus outperformed both control and RV groups in the life-span and health-span parameters tested. This study provides the scope to explore the potential of PJ as a nutraceutical to improve health span and lifespan in human beings.
Collapse
Affiliation(s)
| | - Jayaram Mohan
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore , India
| | - Arunita Chatterjee
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore , India
| | - Esha Patnaik
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore , India
| | - Subrahmanya Kumar Kukkupuni
- Foundation for Revitalisation of Local Health Traditions (FRLHT) , Bangalore , India ; Manipal University , Manipal , India
| | - Upendra Nongthomba
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science , Bangalore , India
| | | |
Collapse
|
262
|
Modulators of cellular senescence: mechanisms, promises, and challenges from in vitro studies with dietary bioactive compounds. Nutr Res 2014; 34:1017-35. [DOI: 10.1016/j.nutres.2014.02.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 02/24/2014] [Accepted: 02/26/2014] [Indexed: 12/11/2022]
|
263
|
Abstract
Organic anion-transporting polypeptides or OATPs are central transporters in the disposition of drugs and other xenobiotics. In addition, they mediate transport of a wide variety of endogenous substrates. The critical role of OATPs in drug disposition has spurred research both in academia and in the pharmaceutical industry. Translational aspects with clinical questions are the focus in academia, while the pharmaceutical industry tries to define and understand the role these transporters play in pharmacotherapy. The present overview summarizes our knowledge on the interaction of food constituents with OATPs and on the OATP transport mechanisms. Further, it gives an update on the available information on the structure-function relationship of the OATPs and, finally, covers the transcriptional and posttranscriptional regulation of OATPs.
Collapse
Affiliation(s)
- Bruno Stieger
- Department of Clinical Pharmacology and Toxicology, University Hospital, Zürich, Switzerland.
| | - Bruno Hagenbuch
- Department of Pharmacology, Toxicology and Therapeutics, The University of Kansas Medical Center, Kansas City, Kansas, USA
| |
Collapse
|
264
|
Vilaplana-Pérez C, Auñón D, García-Flores LA, Gil-Izquierdo A. Hydroxytyrosol and potential uses in cardiovascular diseases, cancer, and AIDS. Front Nutr 2014; 1:18. [PMID: 25988120 PMCID: PMC4428486 DOI: 10.3389/fnut.2014.00018] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 10/09/2014] [Indexed: 12/15/2022] Open
Abstract
Hydroxytyrosol is one of the main phenolic components of olive oil. It is present in the fruit and leaf of the olive (Olea europaea L.). During the past decades, it has been well documented that this phenolic compound has health benefits and a protective action has been found in preclinical studies against several diseases. Here, we review its bioavailability in human beings and several assays showing significant results related with cardiovascular diseases, cancer, and acquired immunodeficiency syndrome (AIDS). Mechanisms of action include potent anti-oxidant and anti-inflammatory effects, among others. The importance of hydroxytyrosol in protection of low-density lipoproteins and consequently its implication in the reduction of cardiovascular disease risk has been highlighted by the European Food Safety Authority, concluding that 5 mg of hydroxytyrosol and its derivatives should be consumed daily to reach this effect at physiological level. We discuss the potential uses of this compound in supplements, nutraceutic foods, or topical formulations in the disease risk reduction. Finally, we conclude that more studies are needed to sustain or reject many other health claims not yet fully documented and to validate these newly available hydroxytyrosol-based products, because it seems to be a good candidate to reduce the risk of diseases mentioned.
Collapse
Affiliation(s)
- Cristina Vilaplana-Pérez
- Department of Food Science and Technology, Centro de Edafología y Biología Aplicada del Segura, CSIC , Murcia , Spain
| | - David Auñón
- Department of Research and Development, Seprox BIOTECH, S.L. , Madrid , Spain
| | - Libia A García-Flores
- Department of Food Science and Technology, Centro de Edafología y Biología Aplicada del Segura, CSIC , Murcia , Spain
| | - Angel Gil-Izquierdo
- Department of Food Science and Technology, Centro de Edafología y Biología Aplicada del Segura, CSIC , Murcia , Spain
| |
Collapse
|
265
|
Resveratrol and its oligomers: modulation of sphingolipid metabolism and signaling in disease. Arch Toxicol 2014; 88:2213-32. [PMID: 25344023 DOI: 10.1007/s00204-014-1386-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 10/08/2014] [Indexed: 01/10/2023]
Abstract
Resveratrol, a natural compound endowed with multiple health-promoting effects, has received much attention given its potential for the treatment of cardiovascular, inflammatory, neurodegenerative, metabolic and age-related diseases. However, the translational potential of resveratrol has been limited by its specificity, poor bioavailability and uncertain toxicity. In recent years, there has been an accumulation of evidence demonstrating that resveratrol modulates sphingolipid metabolism. Moreover, resveratrol forms higher order oligomers that exhibit better selectivity and potency in modulating sphingolipid metabolism. This review evaluates the evidence supporting the modulation of sphingolipid metabolism and signaling as a mechanism of action underlying the therapeutic efficacy of resveratrol and oligomers in diseases, such as cancer.
Collapse
|
266
|
Kennedy DO. Polyphenols and the human brain: plant “secondary metabolite” ecologic roles and endogenous signaling functions drive benefits. Adv Nutr 2014; 5:515-33. [PMID: 25469384 PMCID: PMC4188223 DOI: 10.3945/an.114.006320] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Flavonoids and other polyphenols are ubiquitous plant chemicals that fulfill a range of ecologic roles for their home plant, including protection from a range of biotic and abiotic stressors and a pivotal role in the management of pathogenic and symbiotic soil bacteria and fungi. They form a natural part of the human diet, and evidence suggests that their consumption is associated with the beneficial modulation of a number of health-related variables, including those related to cardiovascular and brain function. Over recent years, the consensus as to the mechanisms responsible for these effects in humans has shifted away from polyphenols having direct antioxidant effects and toward their modulation of cellular signal transduction pathways. To date, little consideration has been given to the question of why, rather than how, these plant-derived chemicals might exert these effects. Therefore, this review summarizes the evidence suggesting that polyphenols beneficially affect human brain function and describes the current mechanistic hypotheses explaining these effects. It then goes on to describe the ecologic roles and potential endogenous signaling functions that these ubiquitous phytochemicals play within their home plant and discusses whether these functions drive their beneficial effects in humans via a process of “cross-kingdom” signaling predicated on the many conserved similarities in plant, microbial, and human cellular signal transduction pathways.
Collapse
|
267
|
Lephart ED, Sommerfeldt JM, Andrus MB. Resveratrol: influences on gene expression in human skin. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.07.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
268
|
Resveratrol increases nephrin and podocin expression and alleviates renal damage in rats fed a high-fat diet. Nutrients 2014; 6:2619-31. [PMID: 25025298 PMCID: PMC4113760 DOI: 10.3390/nu6072619] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 06/09/2014] [Accepted: 06/27/2014] [Indexed: 11/17/2022] Open
Abstract
Resveratrol is well known for its anti-inflammation and anti-oxidant properties, and has been shown to be effective in alleviating the development of obesity. The purpose of this investigation was to analyze the effect of resveratrol on renal damage in obese rats induced by a high-fat diet (HFD) and its possible mechanisms. Male Sprague-Dawley rats were divided into three groups: control, HFD, and HFD plus resveratrol (treated with 100 mg/kg/day resveratrol). Body weight, serum and urine metabolic parameters, and kidney histology were measured. Meanwhile, the activities of nuclear factor-κB (NF-κB) and superoxide dismutase (SOD), the content of malondialdehyde (MDA), and the protein levels of tumor necrosis factor (TNF-α), monocyte chemotactic protein-1 (MCP-1), nephrin and podocin in kidney were detected. Our work showed that resveratrol alleviated dyslipidemia and renal damage induced by HFD, decreased MDA level and increased SOD activity. Furthermore, the elevated NF-κB activity, increased TNF-α and MCP-1 levels, and reduced expressions of nephrin and podocin induced by HFD were significantly reversed by resveratrol. These results suggest resveratrol could ameliorate renal injury in rats fed a HFD, and the mechanisms are associated with suppressing oxidative stress and NF-κB signaling pathway that in turn up-regulate nephrin and podocin protein expression.
Collapse
|
269
|
Aydin MS, Caliskan A, Kocarslan A, Kocarslan S, Yildiz A, Günay S, Savik E, Hazar A, Yalcin F. Intraperitoneal curcumin decreased lung, renal and heart injury in abdominal aorta ischemia/reperfusion model in rat. Int J Surg 2014; 12:601-5. [PMID: 24815029 DOI: 10.1016/j.ijsu.2014.04.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/17/2014] [Accepted: 04/30/2014] [Indexed: 01/22/2023]
Abstract
BACKGROUND Previous studies have demonstrated that curcumin (CUR) has protective effects against ischemia reperfusion injury to various organs. We aimed to determine whether CUR has favorable effects on tissues and oxidative stress in abdominal aorta ischemia-reperfusion injury. MATERIALS AND METHODS Thirty rats were divided into three groups as sham, control and treatment (CUR) group. Control and CUR groups underwent abdominal aorta ischemia for 60 min followed by a 120 min period of reperfusion. In the CUR group, CUR was given 5 min before reperfusion at a dose of 200 mg/kg via an intraperitoneal route. Total antioxidant capacity (TAC), total oxidative status (TOS), and oxidative stress index (OSI) in blood serum were measured, and lung, renal and heart tissue histopathology were evaluated with light microscopy. RESULTS TOS and OSI activity in blood samples were statistically decreased in sham and CUR groups compared to the control group (p < 0.001 for TOS and OSI). Renal, lung, heart injury scores of sham and CUR groups were statistically decreased compared to control group (p < 0.001 for all comparisons). Histopathological examination revealed less severe lesions in CUR group than in the control group. CONCLUSION CUR administered intraperitoneally was effective in reducing oxidative stress and histopathologic injury in an acute abdominal aorta I/R rat model.
Collapse
Affiliation(s)
- Mehmet Salih Aydin
- Harran University Faculty of Medicine, Department of Cardiovascular Surgery, Sanliurfa, Turkey.
| | - Ahmet Caliskan
- Dicle University Faculty of Medicine, Department of Cardiovascular Surgery, Diyarbakır, Turkey
| | - Aydemir Kocarslan
- Harran University Faculty of Medicine, Department of Cardiovascular Surgery, Sanliurfa, Turkey
| | - Sezen Kocarslan
- Harran University Medical Faculty, Department of Pathology, Sanliurfa, Turkey
| | - Ali Yildiz
- Harran University Medical Faculty, Department of Cardiology, Sanliurfa, Turkey
| | - Samil Günay
- Harran University Medical Faculty, Department of Thoracic Surgery, Sanliurfa, Turkey
| | - Emin Savik
- Harran University Medical Faculty, Department of Biochemistry, Sanliurfa, Turkey
| | - Abdussemet Hazar
- Harran University Faculty of Medicine, Department of Cardiovascular Surgery, Sanliurfa, Turkey
| | - Funda Yalcin
- Harran University Medical Faculty, Department of Biochemistry, Sanliurfa, Turkey; Harran University Medical Faculty, Department of Chest Disease, Sanliurfa, Turkey
| |
Collapse
|
270
|
Rodrigo R, Libuy M, Feliú F, Hasson D. Oxidative stress-related biomarkers in essential hypertension and ischemia-reperfusion myocardial damage. DISEASE MARKERS 2013; 35:773-90. [PMID: 24347798 PMCID: PMC3856219 DOI: 10.1155/2013/974358] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 10/07/2013] [Indexed: 12/22/2022]
Abstract
Cardiovascular diseases are a leading cause of mortality and morbidity worldwide, with hypertension being a major risk factor. Numerous studies support the contribution of reactive oxygen and nitrogen species in the pathogenesis of hypertension, as well as other pathologies associated with ischemia/reperfusion. However, the validation of oxidative stress-related biomarkers in these settings is still lacking and novel association of these biomarkers and other biomarkers such as endothelial progenitor cells, endothelial microparticles, and ischemia modified albumin, is just emerging. Oxidative stress has been suggested as a pathogenic factor and therapeutic target in early stages of essential hypertension. Systolic and diastolic blood pressure correlated positively with plasma F2-isoprostane levels and negatively with total antioxidant capacity of plasma in hypertensive and normotensive patients. Cardiac surgery with extracorporeal circulation causes an ischemia/reperfusion event associated with increased lipid peroxidation and protein carbonylation, two biomarkers associated with oxidative damage of cardiac tissue. An enhancement of the antioxidant defense system should contribute to ameliorating functional and structural abnormalities derived from this metabolic impairment. However, data have to be validated with the analysis of the appropriate oxidative stress and/or nitrosative stress biomarkers.
Collapse
Affiliation(s)
- Ramón Rodrigo
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| | - Matías Libuy
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| | - Felipe Feliú
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| | - Daniel Hasson
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| |
Collapse
|