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Abramova A, Bride J, Oger C, Demion M, Galano JM, Durand T, Roy J. Metabolites derived from radical oxidation of PUFA: NEO-PUFAs, promising molecules for health? Atherosclerosis 2024:118600. [PMID: 39341752 DOI: 10.1016/j.atherosclerosis.2024.118600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 08/30/2024] [Accepted: 09/12/2024] [Indexed: 10/01/2024]
Abstract
Oxidative stress plays a critical role in numerous pathological processes. Under these stress conditions, the free radical-catalyzed lipid peroxidation generates in vivo a large number of key products that are involved in many physiological and pathophysiological processes. Among these products are neuroprostanes, which arise from the peroxidation of docosahexaenoic acid (DHA), and isoprostanes, resulting from arachidonic acid (AA) and eicosapentaenoic acid (EPA) through the same peroxidation process. These non-enzymatic oxygenated metabolites newly appointed NEO-PUFAs have gained recognition as reliable markers of oxidative stress in neurogenerative and cardiovascular diseases. Moreover, some of them display a wide range of biological activities. The ability to detect and measure these metabolites offers precious insights into the mechanisms of oxidative damage and holds potential therapeutic implications for various health conditions, including neurodegenerative diseases. This review focuses on the role of neuroprostanes as biomarkers for oxidative stress and related diseases, highlighting their potential applications in medical research and treatment.
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Affiliation(s)
- Anna Abramova
- Institut des Biomolécules Max Mousseron, Pôle Recherche Chimie Balard, Université Montpellier, UMR 5247, CNRS, ENSCM, 34293, Montpellier cedex, France
| | - Jamie Bride
- PhyMedExp, Université de Montpellier, Inserm U1046, UMR CNRS 9412, Montpellier, France
| | - Camille Oger
- Institut des Biomolécules Max Mousseron, Pôle Recherche Chimie Balard, Université Montpellier, UMR 5247, CNRS, ENSCM, 34293, Montpellier cedex, France
| | - Marie Demion
- PhyMedExp, Université de Montpellier, Inserm U1046, UMR CNRS 9412, Montpellier, France
| | - Jean-Marie Galano
- Institut des Biomolécules Max Mousseron, Pôle Recherche Chimie Balard, Université Montpellier, UMR 5247, CNRS, ENSCM, 34293, Montpellier cedex, France
| | - Thierry Durand
- Institut des Biomolécules Max Mousseron, Pôle Recherche Chimie Balard, Université Montpellier, UMR 5247, CNRS, ENSCM, 34293, Montpellier cedex, France.
| | - Jérôme Roy
- Universite de Pau et des Pays de l'Adour, INRAE, NUMEA, Aquapôle, 64310, Saint-Pée-sur-Nivelle, France.
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Han S, Cai L, Chen P, Kuang W. A study of the correlation between stroke and gut microbiota over the last 20years: a bibliometric analysis. Front Microbiol 2023; 14:1191758. [PMID: 37350780 PMCID: PMC10282156 DOI: 10.3389/fmicb.2023.1191758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/19/2023] [Indexed: 06/24/2023] Open
Abstract
Purpose This study intends to uncover a more thorough knowledge structure, research hotspots, and future trends in the field by presenting an overview of the relationship between stroke and gut microbiota in the past two decades. Method Studies on stroke and gut microbiota correlations published between 1st January 2002 and 31st December 2021 were retrieved from the Web of Science Core Collection and then visualized and scientometrically analyzed using CiteSpace V. Results A total of 660 papers were included in the study, among which the United States, the United Kingdom, and Germany were the leading research centers. Cleveland Clinic, Southern Medical University, and Chinese Academy of Science were the top three institutions. The NATURE was the most frequently co-cited journal. STANLEY L HAZEN was the most published author, and Tang WHW was the most cited one. The co-occurrence analysis revealed eight clusters (i.e., brain-gut microbiota axis, fecal microbiome transplantation, gut microbiota, hypertension, TMAO, ischemic stroke, neuroinflammation, atopobiosis). "gut microbiota," "Escherichia coli," "cardiovascular disease," "risk," "disease," "ischemic stroke," "stroke," "metabolism," "inflammation," and "phosphatidylcholine" were the most recent keyword explosions. Conclusion Findings suggest that in the next 10 years, the number of publications produced annually may increase significantly. Future research trends tend to concentrate on the mechanisms of stroke and gut microbiota, with the inflammation and immunological mechanisms, TMAO, and fecal transplantation as hotspots. And the relationship between these mechanisms and a particular cardiovascular illness may also be a future research trend.
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Affiliation(s)
- Shengnan Han
- Clinical Medical College of Acupuncture, Moxibustion and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Longhui Cai
- First School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Peipei Chen
- School of Medical Technology, Qiqihar Medical College, Qiqihar, Heilongjiang, China
| | - Weihong Kuang
- Guangdong Key Laboratory for Research and Development of Natural Drugs, School of Pharmacy, Guangdong Medical University, Dongguan, China
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Schrör K, Verheugt FWA, Trenk D. Drug-Drug Interaction between Antiplatelet Therapy and Lipid-Lowering Agents (Statins and PCSK9 Inhibitors). Thromb Haemost 2023; 123:166-176. [PMID: 36522182 DOI: 10.1055/s-0042-1758654] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Lipid-lowering agents and antiplatelet drugs are guideline-recommended standard treatment for secondary prevention of acute thrombotic events in patients with increased cardiovascular risk. Aspirin is the most frequently used antiplatelet drug, either alone or in combination with other antiplatelet agents (P2Y12 inhibitors), while statins are first-line treatment of hypercholesterolemia. The well-established mode of action of aspirin is inhibition of platelet-dependent thromboxane formation. In addition, aspirin also improves endothelial oxygen defense via enhanced NO formation and inhibits thrombin formation. Low-dose aspirin exerts in addition anti-inflammatory effects, mainly via inhibition of platelet-initiated activation of white cells.Statins inhibit platelet function via reduction of circulating low-density lipoprotein-cholesterol (LDL-C) levels and a more direct inhibition of platelet function. This comprises inhibition of thromboxane formation via inhibition of platelet phospholipase A2 and inhibition of (ox)LDL-C-mediated increases in platelet reactivity via the (ox)LDL-C receptor (CD36). Furthermore, statins upregulate endothelial NO-synthase and improve endothelial oxygen defense by inhibition of NADPH-oxidase. PCSK9 antibodies target a serine protease (PCSK9), which promotes the degradation of the LDL-C receptor impacting on LDL-C plasma levels and (ox)LDL-C-receptor-mediated signaling in platelets similar to but more potent than statins.These functionally synergistic actions are the basis for numerous interactions between antiplatelet and these lipid-lowering drugs, which may, in summary, reduce the incidence of atherothrombotic vascular events.
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Affiliation(s)
- Karsten Schrör
- Institut für Pharmakologie und Klinische Pharmakologie, Heinrich-Heine-Universität, Düsseldorf, Düsseldorf, Germany
| | - Freek W A Verheugt
- Department of Cardiology, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, The Netherlands
| | - Dietmar Trenk
- Department Universitäts-Herzzentrum, Klinik für Kardiologie und Angiologie Bad Krozingen, Klinische Pharmakologie, Universitätsklinikum Freiburg, Bad Krozingen, Germany
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Platelet Redox Imbalance in Hypercholesterolemia: A Big Problem for a Small Cell. Int J Mol Sci 2022; 23:ijms231911446. [PMID: 36232746 PMCID: PMC9570056 DOI: 10.3390/ijms231911446] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/23/2022] [Accepted: 09/24/2022] [Indexed: 11/17/2022] Open
Abstract
The imbalance between reactive oxygen species (ROS) synthesis and their scavenging by anti-oxidant defences is the common soil of many disorders, including hypercholesterolemia. Platelets, the smallest blood cells, are deeply involved in the pathophysiology of occlusive arterial thrombi associated with myocardial infarction and stroke. A great deal of evidence shows that both increased intraplatelet ROS synthesis and impaired ROS neutralization are implicated in the thrombotic process. Hypercholesterolemia is recognized as cause of atherosclerosis, cerebro- and cardiovascular disease, and, closely related to this, is the widespread acceptance that it strongly contributes to platelet hyperreactivity via direct oxidized LDL (oxLDL)-platelet membrane interaction via scavenger receptors such as CD36 and signaling pathways including Src family kinases (SFK), mitogen-activated protein kinases (MAPK), and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. In turn, activated platelets contribute to oxLDL generation, which ends up propagating platelet activation and thrombus formation through a mechanism mediated by oxidative stress. When evaluating the effect of lipid-lowering therapies on thrombogenesis, a large body of evidence shows that the effects of statins and proprotein convertase subtilisin/kexin type 9 inhibitors are not limited to the reduction of LDL-C but also to the down-regulation of platelet reactivity mainly by mechanisms sensitive to intracellular redox balance. In this review, we will focus on the role of oxidative stress-related mechanisms as a cause of platelet hyperreactivity and the pathophysiological link of the pleiotropism of lipid-lowering agents to the beneficial effects on platelet function.
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Demir I, Toker A, Aksoy H, Tasyurek E, Zengin S. The Impact of Shift Type on Oxidative Stress, Inflammation, and Platelet Activation. J Occup Environ Med 2021; 63:e127-e131. [PMID: 33652448 DOI: 10.1097/jom.0000000000002124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Rotating shift is known to disrupt circadian rhythms. The 12/24 shift system, with frequent day-night rotations and the ergonomic shift system (ESS), with 90% less rotations were compared for their impacts on oxidative stress, inflammation, and platelet activation by using pentraxin 3 (PTX3), urinary 15-isoprostane F2t, and 11-dehydrotromboxane B2 (11-DTB2). METHODS All tests were performed by enzyme linked immunosorbent assay (ELISA). Unpaired t test and Pearson correlation analysis were employed. RESULTS Two hundred twenty 12/24 and 198 ESS workers were included. Plasma PTX3 and urinary 15-isoprostane F2t levels were not different between groups. Urinary 11-DTB2 in 12/24 workers were found significantly higher compared with ESS workers (P < 0.0001). A weak but significant correlation was found between urinary 15-isoprostane F2t and urinary 11-DTB2 levels (r = 0.17, P = 0.001). CONCLUSIONS 12/24 rotating shift was found to cause platelet activation disturbances.
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Affiliation(s)
- Irfan Demir
- Independent Researcher (Dr Demir, Dr Aksoy, Dr Zengin); Hipokrat Laboratories, Department of Biochemistry, Istanbul (Dr Toker); Community Health Center, Karaman (Dr Tasyurek), Turkey
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Persike DS, Al-Kass SY. Challenges of post-traumatic stress disorder (PTSD) in Iraq: biochemical network and methodologies. A brief review. Horm Mol Biol Clin Investig 2020; 41:/j/hmbci.ahead-of-print/hmbci-2020-0037/hmbci-2020-0037.xml. [PMID: 33155990 DOI: 10.1515/hmbci-2020-0037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/10/2020] [Indexed: 11/15/2022]
Abstract
Post-traumatic stress disorder (PTSD) is a multifaceted syndrome due to its complex pathophysiology. Signals of illness include alterations in genes, proteins, cells, tissues, and organism-level physiological modifications. Specificity of sensitivity to PTSD suggests that response to trauma depend on gender and type of adverse event being experienced. Individuals diagnosed with PTSD represent a heterogeneous group, as evidenced by differences in symptoms, course, and response to treatment. It is clear that the biochemical mechanisms involved in PTSD need to be elucidated to identify specific biomarkers. A brief review of the recent literature in Pubmed was made to explore the major biochemical mechanisms involved in PTSD and the methodologies applied in the assessment of the disease. PTSD shows pre-exposure vulnerability factors in addition to trauma-induced alterations. The disease was found to be associated with dysfunctions of the hypothalamic-pituitary-adrenal axis (HPA) and hypothalamus-pituitary-thyroid axis. Sympathetic nervous system (SNS) activity play a role in PTSD by releasing norepinephrine and epinephrine. Cortisol release from the adrenal cortex amplifies the SNS response. Cortisol levels in PTSD patients, especially women, are later reduced by a negative feedback mechanism which contributes to neuroendocrine alterations and promotes structural changes in the brain leading to PTSD. Gender differences in normal HPA responsiveness may be due to an increased vulnerability in women to PTSD. Serotonin and dopamine levels were found to be abnormal in the presence of PTSD. Mechanisms such as the induction of neuroinflammation and alterations of mitochondrial energy processing were also associated with PTSD.
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Affiliation(s)
- Daniele Suzete Persike
- Department of Medicinal Chemistry, College of Pharmacy, University of Dohuk, Kurdistan Region, Iraq
| | - Suad Yousif Al-Kass
- Department of Medicinal Chemistry, College of Pharmacy, University of Dohuk, Kurdistan Region, Iraq
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Isoprostanoid Profiling of Marine Microalgae. Biomolecules 2020; 10:biom10071073. [PMID: 32708411 PMCID: PMC7407139 DOI: 10.3390/biom10071073] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/09/2020] [Accepted: 07/14/2020] [Indexed: 12/23/2022] Open
Abstract
Algae result from a complex evolutionary history that shapes their metabolic network. For example, these organisms can synthesize different polyunsaturated fatty acids, such as those found in land plants and oily fish. Due to the presence of numerous double-bonds, such molecules can be oxidized nonenzymatically, and this results in the biosynthesis of high-value bioactive metabolites named isoprostanoids. So far, there have been only a few studies reporting isoprostanoid productions in algae. To fill this gap, the current investigation aimed at profiling isoprostanoids by liquid chromatography -mass spectrometry/mass spectrometry (LC-MS/MS) in four marine microalgae. A good correlation was observed between the most abundant polyunsaturated fatty acids (PUFAs) produced by the investigated microalgal species and their isoprostanoid profiles. No significant variations in the content of oxidized derivatives were observed for Rhodomonas salina and Chaetoceros gracilis under copper stress, whereas increases in the production of C18-, C20- and C22-derived isoprostanoids were monitored in Tisochrysis lutea and Phaeodactylum tricornutum. In the presence of hydrogen peroxide, no significant changes were observed for C. gracilis and for T. lutea, while variations were monitored for the other two algae. This study paves the way to further studying the physiological roles of isoprostanoids in marine microalgae and exploring these organisms as bioresources for isoprostanoid production.
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Trostchansky A, Moore-Carrasco R, Fuentes E. Oxidative pathways of arachidonic acid as targets for regulation of platelet activation. Prostaglandins Other Lipid Mediat 2019; 145:106382. [PMID: 31634570 DOI: 10.1016/j.prostaglandins.2019.106382] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 08/12/2019] [Accepted: 09/03/2019] [Indexed: 12/17/2022]
Abstract
Platelet activation plays an important role in acute and chronic cardiovascular disease states. Multiple pathways contribute to platelet activation including those dependent upon arachidonic acid. Arachidonic acid is released from the platelet membrane by phospholipase A2 action and is then metabolized in the cytosol by specific arachidonic acid oxidation enzymes including prostaglandin H synthase, 12-lipoxygenase, and cytochrome P450 to produce pro- and anti-inflammatory eicosanoids. This review aims to analyze the role of arachidonic acid oxidation on platelet activation, the enzymes that use it as a substrate associated as novel therapeutics target for antiplatelet drugs.
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Affiliation(s)
- Andres Trostchansky
- Departamento de Bioquimica and Centro de Investigaciones Biomédicas (CEINBIO), Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
| | - Rodrigo Moore-Carrasco
- Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Programa de Investigación Asociativa en Cáncer Gástrico (PIA-CG), Universidad de Talca, Chile
| | - Eduardo Fuentes
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Center on Aging, Universidad de Talca, Talca, Chile.
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Wiśniewski K, Jóźwik-Pruska J, Bieńkowski M, Bobeff EJ, Bryl M, Kałużna-Czaplińska J, Jaskólski DJ. Isoprostanes as potential cerebral vasospasm biomarkers. Neurol Neurochir Pol 2018; 52:643-651. [PMID: 30314904 DOI: 10.1016/j.pjnns.2018.09.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/01/2018] [Accepted: 09/25/2018] [Indexed: 11/29/2022]
Abstract
Despite enormous progress in medicine, symptomatic cerebral vasospasm (CVS), remains an unexplained clinical problem, which leaves both physicians and patients helpless and relying on chance, due to the lack of specific marker indicative of imminent danger as well as the lack of specific treatment. In our opinion CVS occurrence depends on dynamic disbalance between free radicals' formation (oxidative stress) and antioxidant activity. Isoprostanes are products of free-radical peroxidation of polyunsaturated fatty acids, and seem to mark a promising path for the research aiming to unravel its possible mechanism. Not only are they the biomarkers of oxidative stress in vivo and in vitro, but also have manifold biological effects (including vasoactive, inflammatory and mitogenic) via activation of the thromboxane A2 receptor (TBXA2R), both in physiological and pathophysiological processes. This review addresses the importance of isoprostanes in CVS in quest of appropriate biomarkers.
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Affiliation(s)
- Karol Wiśniewski
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Barlicki University Hospital, Kopcińskiego 22, 90-153 Lodz, Poland.
| | - Jagoda Jóźwik-Pruska
- Institute of General and Ecological Chemistry, Department of Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland
| | - Michał Bieńkowski
- Department of Molecular Pathology and Neuropathology, Chair of Oncology, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland
| | - Ernest J Bobeff
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Barlicki University Hospital, Kopcińskiego 22, 90-153 Lodz, Poland
| | - Maciej Bryl
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Barlicki University Hospital, Kopcińskiego 22, 90-153 Lodz, Poland
| | - Joanna Kałużna-Czaplińska
- Institute of General and Ecological Chemistry, Department of Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland
| | - Dariusz J Jaskólski
- Department of Neurosurgery and Neurooncology, Medical University of Lodz, Barlicki University Hospital, Kopcińskiego 22, 90-153 Lodz, Poland
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Minuz P, Meneguzzi A, Fumagalli L, Degan M, Calabria S, Ferraro R, Ricci M, Veneri D, Berton G. Calcium-Dependent Src Phosphorylation and Reactive Oxygen Species Generation Are Implicated in the Activation of Human Platelet Induced by Thromboxane A2 Analogs. Front Pharmacol 2018; 9:1081. [PMID: 30319416 PMCID: PMC6169403 DOI: 10.3389/fphar.2018.01081] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 09/06/2018] [Indexed: 11/19/2022] Open
Abstract
The thromboxane (TX) A2 elicits TP-dependent different platelet responses. Low amounts activate Src kinases and the Rho–Rho kinase pathway independently of integrin αIIbβ3 and ADP secretion and synergize with epinephrine to induce aggregation. Aim of the present study was to investigate the role Src kinases and the interplay with calcium signals in reactive oxygen species (ROS) generation in the activatory pathways engaged by TXA2 in human platelets. All the experiments were performed in vitro or ex vivo. Washed platelets were stimulated with 50–1000 nM U46619 and/or 10 μM epinephrine in the presence of acetylsalicylic acid and the ADP scavenger apyrase. The effects of the ROS scavenger EUK-134, NADPH oxidase (NOX) inhibitor apocynin, Src kinase inhibitor PP2 and calcium chelator BAPTA were tested. Intracellular calcium and ROS generation were measured. Platelet rich plasma from patients treated with dasatinib was used to confirm the data obtained in vitro. We observed that 50 nM U46619 plus epinephrine increase intracellular calcium similarly to 1000 nM U46619. ROS generation was blunted by the NOX inhibitor apocynin. BAPTA inhibited ROS generation in resting and activated platelets. Phosphorylation of Src and MLC proteins were not significantly affected by antioxidants agents. BAPTA and antioxidants reduced P-Selectin expression, activation of integrin αIIbβ3and platelet aggregation. TXA2-induced increase in intracellular calcium is required for Src phosphorylation and ROS generation. NADPH oxidase is the source of ROS in TX stimulated platelets. The proposed model helps explain why an incomplete inhibition of TP receptor results in residual platelet activation, and define new targets for antiplatelet treatment.
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Affiliation(s)
- Pietro Minuz
- Section of Internal Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Alessandra Meneguzzi
- Section of Internal Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Laura Fumagalli
- Section of General Pathology, Department of Medicine, University of Verona, Verona, Italy
| | - Maurizio Degan
- Section of Internal Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Stefano Calabria
- Section of Internal Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Roberta Ferraro
- Section of Internal Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Marco Ricci
- Section of Internal Medicine, Department of Medicine, University of Verona, Verona, Italy
| | - Dino Veneri
- Section of Haematology, Department of Medicine, University of Verona, Verona, Italy
| | - Giorgio Berton
- Section of General Pathology, Department of Medicine, University of Verona, Verona, Italy
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Insight into the contribution of isoprostanoids to the health effects of omega 3 PUFAs. Prostaglandins Other Lipid Mediat 2017; 133:111-122. [DOI: 10.1016/j.prostaglandins.2017.05.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/07/2017] [Accepted: 05/31/2017] [Indexed: 12/30/2022]
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Hadzi-Petrushev N, Mitrov D, Kostovski V, Mladenov M. The impact of vitamin C on the relationship among inflammation, lipid peroxidation and platelet activation during analgesic nephropathy in rats. J Basic Clin Physiol Pharmacol 2017; 28:473-481. [PMID: 28771433 DOI: 10.1515/jbcpp-2016-0150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 06/05/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Oxidative stress and inflammation are involved in the pathogenesis of paracetamol-induced renal damage. This study examines the relationship between 8-iso-prostaglandin F2α (8-iso-PGF2α) and platelet activation as well as the relative contribution of the pro-inflammatory markers interleukin (IL)-1β and tumor necrosis factor-α (TNF-α) in enhanced 8-iso-PGF2α biosynthesis, as a complementary onset during analgesic nephropathy induced by chronic treatment with paracetamol. The protective effects of vitamin C on the aforementioned settings are also investigated. METHODS Analgesic nephropathy was induced in Wistar rats. Renal function markers and the activity of antioxidant enzymes were determined spectrophotometrically. Immunoassays were used to measure the pro-inflammatory markers and the markers of lipid peroxidation and platelet activation. RESULTS The chronic treatment with paracetamol led to renal dysfunction, represented by the elevation of plasma urea and creatinine and the decline in the enzymatic antioxidant status, but did not cause a significant increase in TNF-α and IL-1β. The paracetamol-induced lipid peroxidation and enhanced production of 8-iso-PGF2α was not sufficient to cause changes in platelet activation represented by the level of 11-dehydro thromboxane B2. CONCLUSIONS Our results suggest that oxidative stress cannot circumvent the need of stimulation by circulatory cytokines in order to induce inflammatory response and changes in platelet activation during analgesic nephropathy. Vitamin C proved to be beneficial in restoring the renal function markers to normal, increasing the renal enzymatic antioxidant potential, inhibiting lipid peroxidation, and lowering cytokine production and 11-dehydro thromboxane B2 excretion. The observed effects of vitamin C offer support for its potential use as protective treatment in cases of chronic paracetamol overdose.
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Wang W, Yang H, Johnson D, Gensler C, Decker E, Zhang G. Chemistry and biology of ω-3 PUFA peroxidation-derived compounds. Prostaglandins Other Lipid Mediat 2017; 132:84-91. [DOI: 10.1016/j.prostaglandins.2016.12.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 12/21/2016] [Accepted: 12/30/2016] [Indexed: 12/15/2022]
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Zhang Y, Du Y, He JF, Li KJ. 8-iso-prostaglandin-F2α: a possible trigger or accelerator of diabetic retinopathy. Int J Ophthalmol 2016; 9:163-5. [PMID: 26949628 DOI: 10.18240/ijo.2016.01.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Accepted: 05/06/2015] [Indexed: 11/23/2022] Open
Affiliation(s)
- Ying Zhang
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Yi Du
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Jian-Feng He
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
| | - Kai-Jun Li
- Department of Ophthalmology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
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Non-enzymatic cyclic oxygenated metabolites of omega-3 polyunsaturated fatty acid: Bioactive drugs? Biochimie 2015; 120:56-61. [PMID: 26112019 DOI: 10.1016/j.biochi.2015.06.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 06/13/2015] [Indexed: 12/21/2022]
Abstract
Non-enzymatic oxygenated metabolites derived from polyunsaturated fatty acids (PUFA) are formed in vivo through free radical reaction under oxidative stress conditions. It has been over twenty-five years since the discovery of cyclic oxygenated metabolites derived from arachidonic acid (20:4 n-6), the isoprostanes, and since then they have become biomarkers of choice for assessing in vivo OS in humans and animals. Chemical synthesis of n-3 PUFA isoprostanoids such as F3-Isoprostanes from eicosapentaenoic acid (20:5 n-3), and F4-Neuroprostanes from docosahexaenoic acid (22:6 n-6) unravelled novel and unexpected biological properties of such omega-3 non-enzymatic cyclic metabolites as highlighted in this review.
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Guichardant M, Calzada C, Bernoud-Hubac N, Lagarde M, Véricel E. Omega-3 polyunsaturated fatty acids and oxygenated metabolism in atherothrombosis. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1851:485-95. [PMID: 25263947 DOI: 10.1016/j.bbalip.2014.09.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 09/12/2014] [Accepted: 09/17/2014] [Indexed: 11/29/2022]
Abstract
Numerous epidemiological studies and clinical trials have reported the health benefits of omega-3 polyunsaturated fatty acids (PUFA), including a lower risk of coronary heart diseases. This review mainly focuses on the effects of alpha-linolenic (ALA), eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids on some risk factors associated with atherothrombosis, including platelet activation, plasma lipid concentrations and oxidative modification of low-density lipoproteins (LDL). Special focus is given to the effects of marine PUFA on the formation of eicosanoids and docosanoids, and to the bioactive properties of some oxygenated metabolites of omega-3 PUFA produced by cyclooxygenases and lipoxygenases. The antioxidant effects of marine omega-3 PUFA at low concentrations and the pro-oxidant effects of DHA at high concentrations on the redox status of platelets and LDL are highlighted. Non enzymatic peroxidation end-products deriving from omega-3 PUFA such as hydroxy-hexenals, neuroketals and EPA-derived isoprostanes are also considered in relation to atherosclerosis. This article is part of a Special Issue entitled "Oxygenated metabolism of PUFA: analysis and biological relevance".
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Affiliation(s)
- Michel Guichardant
- Université de Lyon, UMR 1060 Inserm (CarMeN), UMR 1397 INRA, INSA-Lyon, IMBL, Villeurbanne, France.
| | - Catherine Calzada
- Université de Lyon, UMR 1060 Inserm (CarMeN), UMR 1397 INRA, INSA-Lyon, IMBL, Villeurbanne, France
| | - Nathalie Bernoud-Hubac
- Université de Lyon, UMR 1060 Inserm (CarMeN), UMR 1397 INRA, INSA-Lyon, IMBL, Villeurbanne, France
| | - Michel Lagarde
- Université de Lyon, UMR 1060 Inserm (CarMeN), UMR 1397 INRA, INSA-Lyon, IMBL, Villeurbanne, France
| | - Evelyne Véricel
- Université de Lyon, UMR 1060 Inserm (CarMeN), UMR 1397 INRA, INSA-Lyon, IMBL, Villeurbanne, France
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Hadzi-Petrushev N, Stojkovski V, Mitrov D, Mladenov M. d-galactose induced inflammation lipid peroxidation and platelet activation in rats. Cytokine 2014; 69:150-3. [DOI: 10.1016/j.cyto.2014.05.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 04/26/2014] [Accepted: 05/12/2014] [Indexed: 11/26/2022]
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Abstract
SIGNIFICANCE Reactive oxidant species (ROS) are highly reactive molecules produced by several cell lines including platelets and serve as second messenger for intracellular signaling. In recent years it became evident that ROS are also implicated in the thrombotic process. Statins are lipid lowering molecules which reduce serum cholesterol and retard atherosclerotic complication and its clinical sequelae. However there is evidence that statins may exert an antiplatelet effects by interfering with redox signaling. RECENT ADVANCES Experimental and clinical studies provided evidence that intra-platelet ROS formation is implicated in the process of thrombosis, as impaired ROS neutralization is associated with serious thrombotic complication and eventually death. Recent studies demonstrated that statins possess antiplatelet activity via inhibition of platelet NADPH oxidase-derived ROS formation. This effect results in down-regulation of isoprostanes, which are pro-aggregating molecules, and up-regulation of nitric oxide, which is a platelet inhibitor; such changes occurred immediately after statin's administration and were independent from lipid lowering property. CRITICAL ISSUES Experimental and clinical studies documented that statins possess an antithrombotic effects which may account for thrombotic-related vascular outcomes. This has been evidenced in clinical settings such as percutaneous coronary intervention, myocardial infarction and venous thrombosis. It is still unclear, however, if the statin's antithrombotic effect is dose-related. FUTURE DIRECTIONS Future studies should be addressed to analyze if the antiplatelet effect of statins may preferentially occur at high dosage of statins. Furthermore, the antiplatelet effects of statins could turn useful in clinical settings where the clinical efficacy of aspirin and other antiplatelet drugs are still uncertain.
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Mendes Arent A, de Souza LF, Walz R, Dafre AL. Perspectives on molecular biomarkers of oxidative stress and antioxidant strategies in traumatic brain injury. BIOMED RESEARCH INTERNATIONAL 2014; 2014:723060. [PMID: 24689052 PMCID: PMC3943200 DOI: 10.1155/2014/723060] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 12/04/2013] [Accepted: 12/09/2013] [Indexed: 11/23/2022]
Abstract
Traumatic brain injury (TBI) is frequently associated with abnormal blood-brain barrier function, resulting in the release of factors that can be used as molecular biomarkers of TBI, among them GFAP, UCH-L1, S100B, and NSE. Although many experimental studies have been conducted, clinical consolidation of these biomarkers is still needed to increase the predictive power and reduce the poor outcome of TBI. Interestingly, several of these TBI biomarkers are oxidatively modified to carbonyl groups, indicating that markers of oxidative stress could be of predictive value for the selection of therapeutic strategies. Some drugs such as corticosteroids and progesterone have already been investigated in TBI neuroprotection but failed to demonstrate clinical applicability in advanced phases of the studies. Dietary antioxidants, such as curcumin, resveratrol, and sulforaphane, have been shown to attenuate TBI-induced damage in preclinical studies. These dietary antioxidants can increase antioxidant defenses via transcriptional activation of NRF2 and are also known as carbonyl scavengers, two potential mechanisms for neuroprotection. This paper reviews the relevance of redox biology in TBI, highlighting perspectives for future studies.
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Affiliation(s)
- André Mendes Arent
- Department of Biochemistry, Federal University of Santa Catarina, Biological Sciences Centre, 88040-900 Florianópolis, SC, Brazil
- Faculty of Medicine, University of South Santa Catarina (Unisul), 88137-270 Palhoça, SC, Brazil
- Neurosurgery Service, São José Regional Hospital (HRSJ-HMG), 88103-901 São José, SC, Brazil
| | - Luiz Felipe de Souza
- Department of Biochemistry, Federal University of Santa Catarina, Biological Sciences Centre, 88040-900 Florianópolis, SC, Brazil
| | - Roger Walz
- Applied Neurosciences Centre (CeNAp) and Department of Medical Clinics, University Hospital, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
| | - Alcir Luiz Dafre
- Department of Biochemistry, Federal University of Santa Catarina, Biological Sciences Centre, 88040-900 Florianópolis, SC, Brazil
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Dovizio M, Alberti S, Guillem-Llobat P, Patrignani P. Role of Platelets in Inflammation and Cancer: Novel Therapeutic Strategies. Basic Clin Pharmacol Toxicol 2013; 114:118-27. [DOI: 10.1111/bcpt.12156] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 10/06/2013] [Indexed: 12/12/2022]
Affiliation(s)
- Melania Dovizio
- Department of Neuroscience and Imaging; Section of Cardiovascular and Pharmacological Sciences, and Center of Excellence on Aging (CeSI), “G. d'Annunzio” University; Chieti Italy
| | - Sara Alberti
- Department of Neuroscience and Imaging; Section of Cardiovascular and Pharmacological Sciences, and Center of Excellence on Aging (CeSI), “G. d'Annunzio” University; Chieti Italy
| | - Paloma Guillem-Llobat
- Department of Neuroscience and Imaging; Section of Cardiovascular and Pharmacological Sciences, and Center of Excellence on Aging (CeSI), “G. d'Annunzio” University; Chieti Italy
| | - Paola Patrignani
- Department of Neuroscience and Imaging; Section of Cardiovascular and Pharmacological Sciences, and Center of Excellence on Aging (CeSI), “G. d'Annunzio” University; Chieti Italy
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Violi F, Carnevale R, Pastori D, Pignatelli P. Antioxidant and antiplatelet effects of atorvastatin by Nox2 inhibition. Trends Cardiovasc Med 2013; 24:142-8. [PMID: 24263084 DOI: 10.1016/j.tcm.2013.09.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/17/2013] [Accepted: 09/18/2013] [Indexed: 10/26/2022]
Abstract
In recent years, it became evident that reactive oxygen species (ROS) are implicated in the thrombotic process. Statins are lipid-lowering agents able to lower serum cholesterol levels and retard atherosclerotic complications and their clinical sequelae. There is evidence that, among statins, atorvastatin may exert antiplatelet effects by interfering with redox signaling. Recent studies demonstrated that atorvastatin possesses antiplatelet activity via inhibition of platelet formation of NADPH oxidase-derived ROS. This effect results in down-regulation of isoprostanes, which are pro-aggregating molecules, and up-regulation of nitric oxide, which is a platelet inhibitor; such changes occurred immediately after atorvastatin administration and were independent from lipid-lowering property. Experimental and clinical studies documented that statins possess antithrombotic effects, which may account for the reduction of thrombotic-related vascular outcomes. This has been evidenced in different cardiovascular clinical settings such as percutaneous coronary intervention (PCI), myocardial infarction (MI), and venous thrombosis. Future studies should be addressed to analyze if the antiplatelet effect of atorvastatin may preferentially occur at high dosage. Interestingly, the antiplatelet effects of statins could be useful in clinical settings where the clinical efficacy of aspirin and other antiplatelet drugs is still uncertain.
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Affiliation(s)
- Francesco Violi
- I Clinica Medica, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy.
| | - Roberto Carnevale
- I Clinica Medica, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Daniele Pastori
- I Clinica Medica, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Pasquale Pignatelli
- I Clinica Medica, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
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Vazzana N, Ganci A, Cefalù AB, Lattanzio S, Noto D, Santoro N, Saggini R, Puccetti L, Averna M, Davì G. Enhanced lipid peroxidation and platelet activation as potential contributors to increased cardiovascular risk in the low-HDL phenotype. J Am Heart Assoc 2013; 2:e000063. [PMID: 23557750 PMCID: PMC3647282 DOI: 10.1161/jaha.113.000063] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background Low high‐density lipoprotein (HDL) levels are major predictors of cardiovascular (CV) events, even in patients on statin treatment with low‐density lipoprotein (LDL) at target. In animal models HDLs protect LDL from oxidation and blunt platelet activation. Our study aimed to examine whether HDL levels are related to in vivo oxidative stress and platelet activation, as determinants of atherothrombosis. Methods and Results Urinary 8‐iso‐PGF2α and 11‐dehydro‐TXB2, in vivo markers of oxidative stress and platelet activation, respectively, were measured in 65 coronary heart disease (CHD) normocholesterolemic patients with HDL ≤35 mg/dL, and in 47 CHD patients with HDL >35 mg/dL. The 2 eicosanoids were also measured before and after an intensive exercise program in sedentary people (n=18) and before and after fenofibrate treatment in otherwise healthy subjects with low HDL (n=10). Patients with HDL ≤35 mg/dL showed significantly higher urinary 8‐iso‐PGF2α (median [25th to 75th percentiles]: 289 [189 to 380] versus 216 [171 to 321] pg/mg creatinine, P=0.019) and 11‐dehydro‐TXB2 (563 [421 to 767] versus 372 [249 to 465] pg/mg creatinine, P=0.0001) than patients with higher HDL. A direct correlation was found between urinary 8‐iso‐PGF2α and 11‐dehydro‐TXB2 in the entire group of patients (ρ=0.77, P<0.0001). HDL levels were inversely related to both 8‐iso‐PGF2α (ρ=−0.32, P=0.001) and 11‐dehydro‐TXB2 (ρ=−0.52, P<0.0001). On multiple regression, only 8‐iso‐PGF2α (β=0.68, P<0.0001) and HDL level (β=−0.29, P<0.0001) were associated with urinary 11‐dehydro‐TXB2 excretion, independent of sex, age, smoking, hypertension, diabetes, previous myocardial infarction, total cholesterol, LDL, and triglycerides. Both intensive exercise and fenofibrate treatment significantly reduced the 2 eicosanoids in healthy subjects, in parallel with an HDL increase. Conclusions A low HDL phenotype, both in CHD patients and in healthy subjects, is associated with increased lipid peroxidation and platelet activation. These data provide novel insight into the mechanisms linking low HDL with increased CV risk.
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Affiliation(s)
- Natale Vazzana
- Department of Internal Medicine and Center of Excellence on Aging, G. d'Annunzio University of Chieti, Chieti, Italy
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24
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Diabetes Mellitus. Platelets 2013. [DOI: 10.1016/b978-0-12-387837-3.00035-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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Ferroni P, Vazzana N, Riondino S, Cuccurullo C, Guadagni F, Davì G. Platelet function in health and disease: from molecular mechanisms, redox considerations to novel therapeutic opportunities. Antioxid Redox Signal 2012; 17:1447-85. [PMID: 22458931 DOI: 10.1089/ars.2011.4324] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Increased oxidative stress appears to be of fundamental importance in the pathogenesis and development of several disease processes. Indeed, it is well known that reactive oxygen species (ROS) exert critical regulatory functions within the vascular wall, and it is, therefore, plausible that platelets represent a relevant target for their action. Platelet activation cascade (including receptor-mediated tethering to the endothelium, rolling, firm adhesion, aggregation, and thrombus formation) is tightly regulated. In addition to already well-defined platelet regulatory factors, ROS may participate in the regulation of platelet activation. It is already established that enhanced ROS release from the vascular wall can indirectly affect platelet activity by scavenging nitric oxide (NO), thereby decreasing the antiplatelet properties of endothelium. On the other hand, recent data suggest that platelets themselves generate ROS, which may evoke pro-thrombotic responses, triggering many biological processes participating in atherosclerosis initiation, progression, and complication. That oxidative stress may alter platelet function is conceivable when considering that antioxidants play a role in the prevention of cardiovascular disease, although the precise mechanism accounting for changes attributable to antioxidants in atherosclerosis remains unknown. It is possible that the effects of antioxidants may be a consequence of their enhancing or promoting the antiplatelet effects of NO derived from both endothelial cells and platelets. This review focuses on current knowledge regarding ROS-dependent regulation of platelet function in health and disease, and summarizes in vitro and in vivo evidence for their physiological and potential therapeutic relevance.
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Affiliation(s)
- Patrizia Ferroni
- Department of Laboratory Medicine and Advanced Biotechnologies, IRCCS San Raffaele Pisana, Rome, Italy
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26
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Karakus E, Halici Z, Albayrak A, Bayir Y, Aydin A, Unal D, Cadirci E, Ferah I, Odaci E. Beneficial Pharmacological Effects of Levosimendan on Antioxidant Status of Acute Inflammation Induced in Paw of Rat: Involvement in Inflammatory Mediators. Basic Clin Pharmacol Toxicol 2012; 112:156-63. [DOI: 10.1111/bcpt.12004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 08/21/2012] [Indexed: 12/20/2022]
Affiliation(s)
- Emre Karakus
- Department of Pharmacology and Toxicology; Ataturk University School of Veterinary; Erzurum; Turkey
| | - Zekai Halici
- Department of Pharmacology; Ataturk University School of Medicine; Erzurum; Turkey
| | - Abdulmecit Albayrak
- Department of Pharmacology; Ataturk University School of Medicine; Erzurum; Turkey
| | - Yasin Bayir
- Department of Biochemistry; Ataturk University School of Pharmacy; Erzurum; Turkey
| | - Ali Aydin
- Department of Histology and Embryology; Ataturk University School of Pharmacy; Erzurum; Turkey
| | - Deniz Unal
- Department of Orthopedic and Traumatology; Ataturk University School of Pharmacy; Erzurum; Turkey
| | - Elif Cadirci
- Department of Pharmacology; Ataturk University School of Pharmacy; Erzurum; Turkey
| | - Irmak Ferah
- Department of Pharmacology; Ataturk University School of Medicine; Erzurum; Turkey
| | - Ersan Odaci
- Department of Histology and Embryology; Karadeniz Technical University School of Medicine; Trabzon; Turkey
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27
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8-isoprostane, prostaglandin E2, C-reactive protein and serum amyloid A as markers of inflammation and oxidative stress in antiphospholipid syndrome: a pilot study. Inflamm Res 2012; 61:809-16. [PMID: 22638905 DOI: 10.1007/s00011-012-0468-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 03/07/2012] [Accepted: 03/12/2012] [Indexed: 10/28/2022] Open
Abstract
OBJECTIVE To test the inflammation and oxidative stress hypothesis in antiphospholipid syndrome (APS) patients and to identify possible associations with clinical and laboratory features of the disease. METHODS Serum amyloid A (SAA), C-reactive protein (CRP), 8-isoprostane and prostaglandin E2 (PGE) were assayed in the sera of 45 APS patients and then compared to control groups made up of 15 antiphospholipid antibody (aPL) negative patients with systemic lupus erythematosus, 15 aPL negative subjects with pregnancy-related morbidity, 15 aPL negative patients with thrombosis, 15 subjects with persistently positive aPL with no signs or symptoms of APS, and 15 healthy volunteers from among the hospital staff. RESULTS APS patients showed significantly higher CRP (p = 0.01), SAA (p < 0.01), 8-isoprostane (p = 0.05) and PGE2 (p = 0.001) plasma levels as compared to controls. Among APS subjects, significantly higher 8-isoprostane and PGE2 levels were observed in patients with triple positivity for aPL (lupus anticoagulant, anticardiolipin and anti-beta2-glycoprotein I antibodies) compared to APS patients with single or double aPL positivity. CONCLUSION Both inflammation and oxidative stress, as measured by SAA, CRP, 8-isoprostane and PGE2, occur in APS and seem to be related to triple positivity for aPL.
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Affiliation(s)
- Ginger L Milne
- Division of Clinical Pharmacology, Vanderbilt University, Nashville, Tennessee 37232-6602, USA.
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29
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Hess K, Grant PJ. Inflammation and thrombosis in diabetes. Thromb Haemost 2011; 105 Suppl 1:S43-54. [PMID: 21479339 DOI: 10.1160/ths10-11-0739] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 02/14/2011] [Indexed: 02/06/2023]
Abstract
Patients with diabetes mellitus are at increased risk of cardiovascular morbidity and mortality. Atherothrombosis, defined as atherosclerotic lesion disruption with superimposed thrombus formation, is the most common cause of death among these patients. Following plaque rupture, adherence of platelets is followed by local activation of coagulation, the formation of a cross-linked fibrin clot and the development of an occlusive platelet rich fibrin mesh. Patients with diabetes exhibit a thrombotic risk clustering which is composed of hyper-reactive platelets, up regulation of pro-thrombotic markers and suppression of fibrinolysis. These changes are mainly mediated by the presence of insulin resistance and dysglycaemia and an increased inflammatory state which directly affects platelet function, coagulation factors and clot structure. This prothrombotic state is related to increased cardiovascular risk and may account for the reduced response to antithrombotic therapeutic approaches, underpinning the need for adequate antithrombotic therapy in patients with diabetes to reduce their cardiovascular mortality.
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Affiliation(s)
- Katharina Hess
- Division of Cardiovascular and Diabetes Research, Leeds Institute of Genetics, Health and Therapeutics, LIGHT Laboratories, Clarendon Way, University of Leeds, Leeds, UK
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30
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Papapanagiotou A, Gissis I, Papadopoulos C, Souglis A, Bogdanis GC, Giosos I, Sotiropoulos A. Changes in Homocysteine and 8-iso-PGF2aLevels in Football and Hockey Players After a Match. Res Sports Med 2011; 19:118-28. [DOI: 10.1080/15438627.2011.556532] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A. Papapanagiotou
- a Department of Biological Chemistry , Medical School, University of Athens , Greece
| | - I. Gissis
- b Department of Physical Education and Sport Sciences , Aristotle University of Thessaloniki , Serres, Greece
| | - C. Papadopoulos
- b Department of Physical Education and Sport Sciences , Aristotle University of Thessaloniki , Serres, Greece
| | - A. Souglis
- c Department of Physical Education and Sport Sciences , University of Athens , Greece
| | - G. C. Bogdanis
- c Department of Physical Education and Sport Sciences , University of Athens , Greece
| | - I. Giosos
- c Department of Physical Education and Sport Sciences , University of Athens , Greece
| | - A. Sotiropoulos
- c Department of Physical Education and Sport Sciences , University of Athens , Greece
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Adipocytokines in atherothrombosis: focus on platelets and vascular smooth muscle cells. Mediators Inflamm 2010; 2010:174341. [PMID: 20652043 PMCID: PMC2905911 DOI: 10.1155/2010/174341] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 03/14/2010] [Accepted: 04/29/2010] [Indexed: 12/11/2022] Open
Abstract
Visceral obesity is a relevant pathological condition closely associated with high risk of atherosclerotic vascular disease including myocardial infarction and stroke. The increased vascular risk is related also to peculiar dysfunction in the endocrine activity of adipose tissue responsible of vascular impairment (including endothelial dysfunction), prothrombotic tendency, and low-grade chronic inflammation. In particular, increased synthesis and release of different cytokines, including interleukins and tumor necrosis factor-α (TNF-α), and adipokines—such as leptin—have been reported as associated with future cardiovascular events. Since vascular cell dysfunction plays a major role in the atherothrombotic complications in central obesity, this paper aims at focusing, in particular, on the relationship between platelets and vascular smooth muscle cells, and the impaired secretory pattern of adipose tissue.
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Ting HJ, Khasawneh FT. Platelet function and Isoprostane biology. Should isoprostanes be the newest member of the orphan-ligand family? J Biomed Sci 2010; 17:24. [PMID: 20370921 PMCID: PMC2854111 DOI: 10.1186/1423-0127-17-24] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Accepted: 04/06/2010] [Indexed: 12/19/2022] Open
Abstract
While there have been many reports investigating the biological activity and signaling mechanisms of isoprostanes, their role in biology, particularly in platelets, appears to still be underestimated. Moreover, whether these lipids have their own receptors is still debated, despite multiple reports that discrete receptors for isporpstanes do exist on platelets, vascular tissues, amongst others. This paper provides a review of the important literature of isoprostanes and provides reasoning that isoprostanes should be classified as orphan ligands until their receptor(s) is/are identified.
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Affiliation(s)
- Harold J Ting
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, Pomona, California 91766, USA
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33
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Smyth EM. Thromboxane and the thromboxane receptor in cardiovascular disease. ACTA ACUST UNITED AC 2010; 5:209-219. [PMID: 20543887 DOI: 10.2217/clp.10.11] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Thromboxane A(2) (TXA(2)), the primary product of COX-1-dependent metabolism of arachidonic acid, mediates its biological actions through the TXA(2) receptor, termed the TP. Irreversible inhibition of platelet COX-1-derived TXA(2) with low-dose aspirin affords protection against primary and secondary vascular thrombotic events, underscoring the central role of TXA(2) as a platelet agonist in cardiovascular disease. The limitations associated with aspirin use include significant gastrointestinal toxicity, bleeding complications, potential interindividual response variability and poor efficacy in some disease states. This, together with the broad role of TXA(2) in cardiovascular disease beyond the platelet, has refocused interest towards additional TXA(2)-associated drug targets, in particular TXA(2) synthase and the TP. The superiority of these agents over low-dose aspirin, in terms of clinical efficacy, tolerability and commercial viability, remain open questions that are the focus of ongoing research.
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Affiliation(s)
- Emer M Smyth
- Institute for Translation Medicine & Therapeutics, University of Pennsylvania, 421 Curie Blvd, 808 BRB 2/3, Philadelphia, PA 19104, USA Tel.: +1 215 573 2323
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Undas A, Siudak Z, Brummel-Ziedins K, Mann KG, Tracz W. Prothrombinase formation at the site of microvascular injury and aspirin resistance: the effect of simvastatin. Thromb Res 2010; 125:283-5. [PMID: 20074780 DOI: 10.1016/j.thromres.2009.12.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2009] [Revised: 11/25/2009] [Accepted: 12/27/2009] [Indexed: 11/29/2022]
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35
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Yin H, Davis T, Porter NA. Simultaneous analysis of multiple lipid oxidation products in vivo by liquid chromatographic-mass spectrometry (LC-MS). Methods Mol Biol 2010; 610:375-386. [PMID: 20013190 DOI: 10.1007/978-1-60327-029-8_22] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Free radical-induced oxidation of polyunsaturated fatty acid (PUFAs) has been linked to a number of human diseases including atherosclerosis and neurodegenerative disorders. Oxidation of PUFAs generates hydroperoxides and cyclic peroxides that are reduced to lipid alcohol, such as hydroxyeicosatetraenoic acid (HETEs), and isoprostanes (IsoPs) respectively. The IsoPs are isomers of prostaglandins that are generated from autoxidation of arachidonic acid (C20:4). Quantification of F(2)-IsoPs has been regarded as the "gold standard" to assess oxidative stress status in various human diseases. We herein report the protocol of analyzing HETEs and F(2)-IsoPs using a triple quadrupole mass spectrometer coupled to reverse phase liquid chromatography. The selected reaction monitoring (SRM) mode selects the parent ion of interest in the first Quad (m/z 319 for HETE and m/z 353 for F(2)-IsoPs) and fragments it in the second while an ion characteristic of the analyte of interest is monitored in the third Quad. This highly selective technique permits the simultaneous analysis of multiple oxidation products such as the HETEs and F(2)-IsoPs. This LC-MS technique can be applied to study the free radical oxidation mechanism in vitro and assess the oxidative stress status in biological tissues and fluids.
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Affiliation(s)
- Huiyong Yin
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University, Nashville, TN, USA
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Tacconelli S, Capone ML, Patrignani P. Measurement of 8-iso-prostaglandin F2alpha in biological fluids as a measure of lipid peroxidation. Methods Mol Biol 2010; 644:165-178. [PMID: 20645173 DOI: 10.1007/978-1-59745-364-6_14] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Several lines of evidence suggest that reactive oxygen species are implicated in human disease, including atherosclerosis, hypertension, and restenosis after angioplasty. The measurement of F(2)-isoprostanes (F(2)-iPs), formed nonenzymatically through free radical catalyzed attack on esterified arachidonate, provides a reliable tool for identifying populations with enhanced rates of lipid peroxidation. Among F(2)-isoPs, 8-iso-PGF(2alpha) (also referred to IPF(2alpha)-III) and IPF(2alpha)-VI are the most frequently measured in biological fluids. A variety of methods have been proposed to measure F(2)-isoprostanes in urine and plasma. Mass spectrometry has been developed for the measurement of both F(2)-isoprostanes but its use is limited as it is time-consuming and highly expensive. We have developed validated enzyme immunoassay (EIA) and radioimmunoassay (RIA) techniques using highly specific antisera for the measurement of 8-iso-PGF(2alpha). In contrast, the commercially available immunoassay kits are limited for their poor specificity. The measurement of specific isoprostanes, such as 8-iso-PGF(2alpha), in urine is a reliable, noninvasive index of lipid peroxidation that is of valuable help in dose-finding studies of natural and synthetic antioxidant agents.
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Affiliation(s)
- Stefania Tacconelli
- Department of Medicine and Center of Excellence on Aging, G. d'Annunzio University School of Medicine, Chieti, Italy
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Anfossi G, Russo I, Trovati M. Platelet dysfunction in central obesity. Nutr Metab Cardiovasc Dis 2009; 19:440-449. [PMID: 19346117 DOI: 10.1016/j.numecd.2009.01.006] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 01/13/2009] [Accepted: 01/22/2009] [Indexed: 12/23/2022]
Abstract
Central obesity is a relevant risk factor for major cardiovascular events due to the atherosclerotic involvement of coronary, cerebral and lower limb arterial vessels. A major role in the increased cardiovascular risk is played by platelets, which show an increased activation and a reduced sensitivity to the physiological and pharmacological antiaggregating agents. This review focuses on platelet dysfunction in central obesity. The mechanisms involved are related to: i) the reduced sensitivity to insulin and other substances acting via intracellular cyclic nucleotides, such as nitrates and prostacyclin; ii) the altered intracellular ionic milieu with elevated cytosolic Ca(2+); and iii) the increased oxidative stress, which elicits isoprostane production from arachidonic acid. Therapeutic guidelines recommend a multifactorial prevention of cardiovascular disease including antiplatelet drugs in high risk patients, even though, at present, the protective effect of antiplatelet therapy in obese, insulin resistant subjects has not been evaluated by specific trials. Some reports, however, suggest a decreased sensitivity to the antiaggregating effects of both acetylsalicylic acid (aspirin) and thienopyridines in human obesity. Platelet defects may play a pivotal role in the reduced efficacy of antiplatelet therapy in obese subjects in the setting of cardiovascular prevention and acute coronary syndrome treatment. Thus, a specifically tailored antiaggregating therapy is likely necessary in obese, insulin resistant subjects, especially in the presence of type 2 diabetes mellitus.
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Affiliation(s)
- G Anfossi
- Diabetes Unit, Department of Clinical and Biological Sciences of the Turin University, San Luigi Gonzaga Hospital, Orbassano I-10043, Turin, Italy
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Song WL, Paschos G, Fries S, Reilly MP, Yu Y, Rokach J, Chang CT, Patel P, Lawson JA, Fitzgerald GA. Novel eicosapentaenoic acid-derived F3-isoprostanes as biomarkers of lipid peroxidation. J Biol Chem 2009; 284:23636-43. [PMID: 19520854 DOI: 10.1074/jbc.m109.024075] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Isoprostanes (iPs) are prostaglandin (PG) isomers generated by free radical-catalyzed peroxidation of polyunsaturated fatty acids (PUFAs). Urinary F(2)-iPs, PGF(2alpha) isomers derived from arachidonic acid (AA) are used as indices of lipid peroxidation in vivo. We now report the characterization of two major F(3)-iPs, 5-epi-8,12-iso-iPF(3alpha)-VI and 8,12-iso-iPF(3alpha)-VI, derived from the omega-3 fatty acid, eicosapentaenoic acid (EPA). Although the potential therapeutic benefits of EPA receive much attention, a shift toward a diet rich in omega-3 PUFAs may also predispose to enhanced lipid peroxidation. Urinary 5-epi-8,12-iso-iPF(3alpha)-VI and 8,12-iso-iPF(3alpha)-VI are highly correlated and unaltered by cyclooxygenase inhibition in humans. Fish oil dose-dependently elevates urinary F(3)-iPs in mice and a shift in dietary omega-3/omega-6 PUFAs is reflected by an increasing slope [m] of the line relating urinary 8, 12-iso-iPF(3alpha)-VI and 8,12-iso-iPF(2alpha)-VI. Administration of bacterial lipopolysaccharide evokes a reversible increase in both urinary 8,12-iso-iPF(3alpha)-VI and 8,12-iso-iPF(2alpha)-VI in humans on an ad lib diet. However, while excretion of the iPs is highly correlated (R(2) median = 0.8), [m] varies by an order of magnitude, reflecting marked inter-individual variability in the relative peroxidation of omega-3 versus omega-6 substrates. Clustered analysis of F(2)- and F(3)-iPs refines assessment of the oxidant stress response to an inflammatory stimulus in vivo by integrating variability in dietary intake of omega-3/omega-6 PUFAs.
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Affiliation(s)
- Wen-Liang Song
- Institute for Translational Medicine and Therapeutics, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Angiolillo DJ, Suryadevara S. Aspirin and clopidogrel: efficacy and resistance in diabetes mellitus. Best Pract Res Clin Endocrinol Metab 2009; 23:375-88. [PMID: 19520310 DOI: 10.1016/j.beem.2008.12.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Diabetes mellitus patients are characterized by enhanced platelet reactivity which exposes them to an increased risk of atherothrombotic events in the setting of acute coronary syndromes or percutaneous coronary interventions. Although aspirin and clopidogrel, used either solely or in combination, are associated with improved clinical outcomes in high-risk patients, diabetics patients treated with antiplatelet agents remain at higher risk of recurrent ischemic events. Recent laboratory findings suggest that this observation may be related to a reduced responsiveness or 'resistance' to these agents. In this chapter the efficacy of currently available oral antiplatelet agents in preventing ischemic events is reviewed. In addition, the antiplatelet 'resistance' phenomenon in the diabetic population and its impact on clinical outcomes is summarized. Finally, future developments in the field directed towards individualized treatment strategies and novel antiplatelet agents are examined.
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Affiliation(s)
- Dominick J Angiolillo
- Division of Cardiology, University of Florida College of Medicine-Jacksonville, Jacksonville, FL 32209, USA.
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42
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Prostanoid and isoprostanoid pathways in atherogenesis. Atherosclerosis 2008; 201:8-16. [DOI: 10.1016/j.atherosclerosis.2008.04.037] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2008] [Revised: 03/31/2008] [Accepted: 04/11/2008] [Indexed: 02/02/2023]
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Abstract
The isoprostanes (IsoPs) are a unique series of prostaglandin-like compounds formed in vivo via a nonenzymatic mechanism involving the free radical-initiated peroxidation of arachidonic acid. This article summarizes our current knowledge of these compounds. Herein, a historical account of their discovery and the mechanism of their formation are described. A specific class of IsoPs, the F2-IsoPs, are stable, robust molecules that can be measured as indices of endogenous oxidant stress. The utility of these molecules as biomarkers and methods by which these compounds can be quantified are discussed. In addition to the F2-IsoPs, isoprostanes with other prostane ring structures as well as oxidation products with furan and dioxolane rings can be generated from arachidonic acid. And, in more recent years, isoprostane-like compounds have been shown to be formed from polyunsaturated fatty acids including eicosapentaenoic acid [C20:5, omega-3], docosahexaenoic acid [C22:6, omega-3], and adrenic acid [C22:4, omega-6]. These findings will be summarized as well.
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Affiliation(s)
- L Jackson Roberts
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA.
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Khasawneh FT, Huang JS, Mir F, Srinivasan S, Tiruppathi C, Le Breton GC. Characterization of isoprostane signaling: evidence for a unique coordination profile of 8-iso-PGF(2alpha) with the thromboxane A(2) receptor, and activation of a separate cAMP-dependent inhibitory pathway in human platelets. Biochem Pharmacol 2008; 75:2301-15. [PMID: 18455148 DOI: 10.1016/j.bcp.2008.03.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Revised: 03/18/2008] [Accepted: 03/24/2008] [Indexed: 12/18/2022]
Abstract
Since isoprostanes are thought to participate in the pathogenesis of thrombosis, presumably through their interaction with thromboxane receptors (TPRs), we examined the ability of 8-iso-PGF(2alpha) to bind/signal through TPRs. Using TPR expressing HEK cells, it was found that 8-iso-PGF(2alpha) mobilized calcium and bound TPRs with a dissociation constant (K(d)) of 57 nM. Interestingly, site-directed-mutagenesis revealed that 8-iso-PGF(2alpha) has a unique coordination profile with TPRs. Thus, while Phe184 and Asp193 are shared by both 8-iso-PGF(2alpha) and classical TPR ligands, Phe196 was found to be required only for 8-iso-PGF(2alpha) binding. Functional studies also revealed interesting results. Namely, that 8-iso-PGF(2alpha) signals in human platelets through both a stimulatory (TPR-dependent) and an inhibitory (cAMP-dependent) pathway. Consistent with the existence of two signaling pathways, platelets were also found to possess two separate binding sites for 8-iso-PGF(2alpha). While the stimulatory site is represented by TPRs, the second cAMP inhibitory site is presently unidentified, but does not involve receptors for PGI(2), PGD(2) or PGE(2). In summary, these studies provide the first documentation that: (1) 8-iso-PGF(2alpha) coordinates with Phe184, Asp193 and Phe196 on platelet TPRs; (2) Phe196 serves as a unique TPR binding site for 8-iso-PGF(2alpha); (3) 8-iso-PGF(2alpha) signals through both stimulatory and inhibitory pathways in platelets; (4) 8-iso-PGF(2alpha) inhibits human platelet activation through a cAMP-dependent mechanism; (5) 8-iso-PGF(2alpha) interacts with platelets at two separate binding sites. Collectively, these results provide evidence for a novel isoprostane function in platelets which is mediated through a cAMP-coupled receptor.
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Affiliation(s)
- Fadi T Khasawneh
- Department of Pharmacology, The University of Illinois at Chicago, 835 S Wolcott Avenue, M/C 868, Chicago, IL 60612, USA
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Gessler T, Seeger W, Schmehl T. Inhaled Prostanoids in the Therapy of Pulmonary Hypertension. J Aerosol Med Pulm Drug Deliv 2008; 21:1-12. [DOI: 10.1089/jamp.2007.0657] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- Tobias Gessler
- Department of Internal Medicine, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Werner Seeger
- Department of Internal Medicine, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Thomas Schmehl
- Department of Internal Medicine, Justus-Liebig-University of Giessen, Giessen, Germany
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Affiliation(s)
- Ginger L Milne
- Division of Clinical Pharmacology, Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-6602, USA
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Gardi C, Arezzini B, Monaco B, De Montis MG, Vecchio D, Comporti M. F2-isoprostane receptors on hepatic stellate cells. J Transl Med 2008; 88:124-31. [PMID: 18158556 DOI: 10.1038/labinvest.3700712] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
F2-isoprostanes are considered as the most reliable markers of oxidative stress and can be used to evaluate the oxidative status in a number of human pathologies. Besides being markers of oxidative stress, F2-isoprostanes proved to be mediators of important biological effects and would act through the activation of receptors analogous to those for thromboxane A2. In a previous work, we provided evidence that F(2)-isoprostanes, generated during carbon tetrachloride-induced hepatic fibrosis, mediate hepatic stellate cell (HSC) proliferation and collagen hyperproduction. To investigate whether TxA2 receptor (TxA2r or TPr) is involved in the effects of F2-isoprostanes on HSC, experiments on DNA synthesis were carried out in the presence of 8-epi-prostaglandin F(2alpha) (8-epi-PGF(2alpha)) or the TxA2r-specific agonist I-BOP ([1S-[1alpha,2alpha(Z),3beta(1E,3S*), 4alpha]]-7-[3-[3-hydroxy-4-(4-iodophenoxy)-1-butenyl]-7-oxabicyclo[2.2.1]hept-2-yl]-5-heptenoic acid). Both agonists significantly stimulated DNA synthesis, which was almost completely inhibited by the TxA2r-specific antagonist SQ29548 ([1S-[1alpha,2alpha(Z),3alpha,4alpha]]-7-[3-[[2-[(phenylamino)carbonyl] hydrazino] methyl]-7-oxabicyclo[2.2.1]hept-2-yl]-5-heptanoic acid), suggesting that much of the effect of 8-epi-PGF(2alpha) is mediated by the TxA2r. Further studies showed that increasing concentrations of SQ29548 progressively inhibit DNA synthesis, suggesting a possible competitive antagonism between the two molecules. In addition, we demonstrated that the stimulatory effect of 8-epi-PGF(2alpha) on collagen synthesis could be mediated by TxA2r. The occurrence of TxA2r on HSC was also investigated using western blotting analysis and immunocytochemistry, which reveals that TP is distributed both on plasma membranes and within the cells. Moreover, binding studies indicated the presence of a specific binding site for 3H-SQ29548 on HSC. Competition binding studies indicated that 8-epi-PGF(2alpha) and I-BOP were both able to displace 3H-SQ29548 binding with a very different affinity (K(i)=4.14+/-1.9 x 10(-6) M and K(i)=1.15+/-0.3 x 10(-9) M, respectively), suggesting the involvement of a modified form of isoprostane receptor, homologous to the classic thromboxane A2-binding site in F2-isoprostanes-evoked responses on HSC.
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Affiliation(s)
- Concetta Gardi
- Department of Pathophysiology, Experimental Medicine and Public Health, University of Siena, Siena, Italy
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Affiliation(s)
- Giovanni Davì
- Center of Excellence on Aging, G. d'Annunzio University Foundation, Chieti, Italy
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Yin H, Brooks JD, Gao L, Porter NA, Morrow JD. Identification of Novel Autoxidation Products of the ω-3 Fatty Acid Eicosapentaenoic Acid in Vitro and in Vivo. J Biol Chem 2007; 282:29890-901. [PMID: 17711863 DOI: 10.1074/jbc.m703108200] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Increased intake of fish oil rich in the omega-3 fatty acids eicosapentaenoic acid (EPA, C20:5 omega-3) and docosahexaenoic acid (DHA, C22:6 omega-3) reduces the incidence of human disorders such as atherosclerotic cardiovascular disease. However, mechanisms that contribute to the beneficial effects of fish oil consumption are poorly understood. Mounting evidence suggests that oxidation products of EPA and DHA may be responsible, at least in part, for these benefits. Previously, we have defined the free radical-induced oxidation of arachidonic acid in vitro and in vivo and have proposed a unified mechanism for its peroxidation. We hypothesize that the oxidation of EPA can be rationally defined but would be predicted to be significantly more complex than arachidonate because of the fact that EPA contains an addition carbon-carbon double bond. Herein, we present, for the first time, a unified mechanism for the peroxidation of EPA. Novel oxidation products were identified employing state-of-the-art mass spectrometric techniques including Ag(+) coordination ionspray and atmospheric pressure chemical ionization mass spectrometry. Predicted compounds detected both in vitro and in vivo included monocylic peroxides, serial cyclic peroxides, bicyclic endoperoxides, and dioxolane-endoperoxides. Systematic study of the peroxidation of EPA provides the basis to examine the role of specific oxidation products as mediators of the biological effects of fish oil.
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Affiliation(s)
- Huiyong Yin
- Department of Medicine and Pharmacology, Vanderbilt University, Nashville, Tennessee 37232, USA
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50
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Rolin S, Hanson J, Vastersaegher C, Cherdon C, Pratico D, Masereel B, Dogne JM. BM-520, an original TXA2 modulator, inhibits the action of thromboxane A2 and 8-iso-prostaglandin F2α in vitro and in vivo on human and rodent platelets, and aortic vascular smooth muscles from rodents. Prostaglandins Other Lipid Mediat 2007; 84:14-23. [PMID: 17643884 DOI: 10.1016/j.prostaglandins.2007.03.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Revised: 03/08/2007] [Accepted: 03/08/2007] [Indexed: 11/29/2022]
Abstract
Thromboxane A(2) (TXA(2)) and 8-iso-PGF(2alpha) are two prostanoid agonists of the thromboxane A(2) receptor (TP), whose activation has been involved in platelet aggregation and atherosclerosis. Agents able to counteract the actions of these agonists are of great interest in the treatment and prevention of cardiovascular events. Here, we investigated in vitro and in vivo the pharmacological profile of BM-520, a new TP antagonist. In our experiments, this compound showed a great binding affinity for human washed platelets TP receptors, and prevented human platelet activation and aggregation induced by U-46619, arachidonic acid and 8-iso-PGF(2alpha). The TP receptor antagonist property of BM-520 was confirmed by its relaxing effect on rat aorta smooth muscle preparations precontracted with U-46619 and 8-iso-PGF(2alpha). Further, its TP antagonism was also demonstrated in vivo in guinea pig after a single intravenous injection (10 mg kg(-1)). We conclude that this novel TP antagonist could be a promising therapeutic tool in pathologies such as atherosclerosis where an increased production of TXA(2) and 8-iso-PGF(2alpha), as well as TP activation are well-established pathogenic events.
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Affiliation(s)
- S Rolin
- Department of Pharmacy, University of Namur, Rue de Bruxelles, 61, B-5000 Namur, Belgium
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