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Han AY, Ha SM, Shin YK, Seol GH. Ginsenoside Rg-1 prevents elevated cytosolic Ca 2+ via store-operated Ca 2+ entry in high-glucose-stimulated vascular endothelial and smooth muscle cells. BMC Complement Med Ther 2022; 22:166. [PMID: 35733160 PMCID: PMC9215051 DOI: 10.1186/s12906-022-03647-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/10/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ginsenoside Rg-1 (Rg-1), a triterpenoid saponin abundantly present in Panax ginseng, is a type of naturally occurring steroid with known anti-diabetic and anti-inflammatory effects. In this study, we sought to confirm the effects and mechanisms of action of Rg-1 on store-operated Ca2+ entry (SOCE) in human vascular endothelial cell line (EA) and murine aortic vascular smooth muscle cell line (MOVAS) cells exposed to high glucose. METHODS Cytosolic Ca2+ concentrations in EA and MOVAS cells were measured by monitoring fluorescence of the ratiometric Ca2+-indicator, Fura-2 AM. RESULTS High glucose significantly increased Ca2+ influx by abnormally activating SOCE in EA and MOVAS cells. Notably, this high glucose-induced increase in SOCE was restored to normal levels in EA and MOVAS cells by Rg-1. Moreover, Rg-1 induced reductions in SOCE in cells exposed to high glucose were significantly inhibited by the plasma membrane Ca2+ ATPase (PMCA) blocker lanthanum, the Na+/K+-ATPase blocker ouabain, or the Na+/Ca2+ exchanger (NCX) blockers Ni2+ and KB-R7943. These observations suggest that the mechanism of action of Rg-1 inhibition of SOCE involves PMCA and Na+/K+-ATPase, and an increase in Ca2+ efflux via NCXs in both EA and MOVAS cells exposed to high glucose. CONCLUSIONS These findings indicate that Rg-1 may protect vascular endothelial and smooth muscle cells from Ca2+ increases following exposure to hyperglycemic conditions.
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Affiliation(s)
- A Young Han
- Department of Basic Nursing Science, College of Nursing, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
- Department of Nursing, College of Life Science and Industry, Sunchon National University, Suncheon, Republic of Korea
| | - Su Min Ha
- Department of Basic Nursing Science, College of Nursing, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - You Kyoung Shin
- Department of Basic Nursing Science, College of Nursing, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Geun Hee Seol
- Department of Basic Nursing Science, College of Nursing, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
- BK21 FOUR Program of Transdisciplinary Major in Learning Health Systems, Graduate School, Korea University, Seoul, Republic of Korea.
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2
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Vasquez-Goñi GA, Papuico-Romero BM, Urrunaga-Pastor D, Runzer-Colmenares FM, Parodi JF. The depressed frail phenotype as a risk factor for mortality in older adults: A prospective cohort in Peru. Heliyon 2022; 8:e08640. [PMID: 35028442 PMCID: PMC8741456 DOI: 10.1016/j.heliyon.2021.e08640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/23/2021] [Accepted: 12/16/2021] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Frailty and depression can coexist as depressed frail phenotype, useful for the comprehensive evaluation of older adults and prevention of adverse outcomes. The objective of this study was to evaluate the role of the depressed frail phenotype and its components as risk factors for mortality in older adults of the Centro Médico Naval (CEMENA) of Peru during 2010-2015. MATERIAL AND METHODS We carried out a secondary data analysis of a prospective cohort that included older adults (60 years and older) treated in the Geriatrics service of CEMENA between the years 2010-2015. Frailty was defined as the presence of three or more Fried phenotype criteria and depression was determined using a Yesavage ultrashort scale score of three or more. The presence of both conditions was defined as depressed frail phenotype. In addition, sociodemographic characteristics, medical and personal history, and performance-based measures were included. We employed crude and adjusted Cox regression models to evaluate the association of interest and estimate Hazard Ratios (HR) with their respective 95% confidence intervals (95% CI). RESULTS 946 older adults were included in the analysis, with a mean age of 78.0 ± 8.5 years. 559 (59.1%) were male, 148 (15.6%) were found to be frail, 231 (24.4%) had depressive symptoms, 105 (11.1%) had depressed frail phenotype, and 79 (8.3%) participants died during follow-up. The adjusted Cox regression analysis revealed that depressed frail phenotype (HR = 3.53; 95%CI: 2.07-6.00; p < 0.001) was a risk factor for mortality in older adults. CONCLUSIONS The depressed frail phenotype was associated with a higher risk of mortality in older adults. It is necessary to develop longitudinal studies that allow estimating this phenotype's impact on mortality and evaluate interventions to improve quality of life and reduce the risk of adverse outcomes.
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Affiliation(s)
- Gabriel A.J. Vasquez-Goñi
- Universidad Científica del Sur, Facultad de Ciencias de la Salud, Carrera de Medicina Humana, Lima, Perú
| | - Basilio M. Papuico-Romero
- Universidad Científica del Sur, Facultad de Ciencias de la Salud, Carrera de Medicina Humana, Lima, Perú
| | - Diego Urrunaga-Pastor
- Universidad Científica del Sur, Facultad de Ciencias de la Salud, Carrera de Medicina Humana, Lima, Perú
| | - Fernando M. Runzer-Colmenares
- Universidad Científica del Sur, Facultad de Ciencias de la Salud, Carrera de Medicina Humana, Lima, Perú
- Universidad de San Martin de Porres, Facultad de Medicina Humana, Centro de Investigación del Envejecimiento (CIEN), Lima, Perú
| | - José F. Parodi
- Universidad de San Martin de Porres, Facultad de Medicina Humana, Centro de Investigación del Envejecimiento (CIEN), Lima, Perú
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El Haouari M. Platelet Oxidative Stress and its Relationship with Cardiovascular Diseases in Type 2 Diabetes Mellitus Patients. Curr Med Chem 2019; 26:4145-4165. [PMID: 28982316 DOI: 10.2174/0929867324666171005114456] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 06/07/2017] [Accepted: 06/07/2017] [Indexed: 01/01/2023]
Abstract
Enhanced platelet activation and thrombosis are linked to various cardiovascular diseases (CVD). Among other mechanisms, oxidative stress seems to play a pivotal role in platelet hyperactivity. Indeed, upon stimulation by physiological agonists, human platelets generate and release several types of reactive oxygen species (ROS) such as O2 -, H2O2 or OH-, further amplifying the platelet activation response via various signalling pathways, including, formation of isoprostanes, Ca2+ mobilization and NO inactivation. Furthermore, excessive platelet ROS generation, incorporation of free radicals from environment and/or depletion of antioxidants induce pro-oxidant, pro-inflammatory and platelet hyperaggregability effects, leading to the incidence of cardiovascular events. Here, we review the current knowledge regarding the effect of oxidative stress on platelet signaling pathways and its implication in CVD such as type 2 diabetes mellitus. We also summarize the role of natural antioxidants included in vegetables, fruits and medicinal herbs in reducing platelet function via an oxidative stress-mediated mechanism.
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Affiliation(s)
- Mohammed El Haouari
- Centre Regional des Metiers de l'Education et de la Formation de Taza (CRMEF - Taza), B.P: 1178 - Taza Gare, Morocco
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Carrizzo A, Izzo C, Oliveti M, Alfano A, Virtuoso N, Capunzo M, Di Pietro P, Calabrese M, De Simone E, Sciarretta S, Frati G, Migliarino S, Damato A, Ambrosio M, De Caro F, Vecchione C. The Main Determinants of Diabetes Mellitus Vascular Complications: Endothelial Dysfunction and Platelet Hyperaggregation. Int J Mol Sci 2018; 19:ijms19102968. [PMID: 30274207 PMCID: PMC6212935 DOI: 10.3390/ijms19102968] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 12/24/2022] Open
Abstract
Diabetes mellitus is a common disease that affects 3–5% of the general population in Italy. In some countries of northern Europe or in North America, it can even affect 6–8% of the population. Of great concern is that the number of cases of diabetes is constantly increasing, probably due to the increase in obesity and the sedentary nature of the population. According to the World Health Organization, in the year 2030 there will be 360 million people with diabetes, compared to 170 million in 2000. This has important repercussions on the lives of patients and their families, and on health systems that offer assistance to patients. In this review, we try to describe in an organized way the pathophysiological continuity between diabetes mellitus, endothelial dysfunction, and platelet hyperaggregation, highlighting the main molecular mechanisms involved and the interconnections.
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Affiliation(s)
| | - Carmine Izzo
- Departement of Medicine and Surgery, University of Salerno, 84081 Baronissi, SA, Italy.
| | - Marco Oliveti
- Departement of Medicine and Surgery, University of Salerno, 84081 Baronissi, SA, Italy.
| | - Antonia Alfano
- Heart Department, A.O.U. "San Giovanni di Dio e Ruggi d'Aragona", 84131 Salerno, Italy.
| | - Nicola Virtuoso
- Department of Cardiovascular Medicine, A.O.U. Federico II, 80131 Naples, Italy.
| | - Mario Capunzo
- Departement of Medicine and Surgery, University of Salerno, 84081 Baronissi, SA, Italy.
| | - Paola Di Pietro
- Departement of Medicine and Surgery, University of Salerno, 84081 Baronissi, SA, Italy.
| | | | - Eros De Simone
- Heart Department, A.O.U. "San Giovanni di Dio e Ruggi d'Aragona", 84131 Salerno, Italy.
| | - Sebastiano Sciarretta
- IRCCS Neuromed, 86077 Pozzilli, IS, Italy.
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, 00161 Rome, Italy.
| | - Giacomo Frati
- IRCCS Neuromed, 86077 Pozzilli, IS, Italy.
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, 00161 Rome, Italy.
| | - Serena Migliarino
- Department of Clinical and Molecular Medicine, School of Medicine and Psychology, Sapienza University of Rome, 00161 Rome, Italy.
| | | | | | - Francesco De Caro
- Departement of Medicine and Surgery, University of Salerno, 84081 Baronissi, SA, Italy.
| | - Carmine Vecchione
- IRCCS Neuromed, 86077 Pozzilli, IS, Italy.
- Departement of Medicine and Surgery, University of Salerno, 84081 Baronissi, SA, Italy.
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Taghizadeh M, Ahmadizad S, Naderi M. Effects of endurance training on hsa-miR-223, P2RY12 receptor expression and platelet function in type 2 diabetic patients. Clin Hemorheol Microcirc 2018. [DOI: 10.3233/ch-170300] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Mahmoudreza Taghizadeh
- Department of Biological Sciences in Sport, Faculty of Sports Sciences and Health, Shahid Beheshti University, Iran
| | - Sajad Ahmadizad
- Department of Biological Sciences in Sport, Faculty of Sports Sciences and Health, Shahid Beheshti University, Iran
| | - Mahmood Naderi
- Cell-Based Therapies Research Center, Digestive Disease Research Institute, Tehran University of Medical Science, Tehran, Iran
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Stafford N, Wilson C, Oceandy D, Neyses L, Cartwright EJ. The Plasma Membrane Calcium ATPases and Their Role as Major New Players in Human Disease. Physiol Rev 2017; 97:1089-1125. [PMID: 28566538 DOI: 10.1152/physrev.00028.2016] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 02/07/2023] Open
Abstract
The Ca2+ extrusion function of the four mammalian isoforms of the plasma membrane calcium ATPases (PMCAs) is well established. There is also ever-increasing detail known of their roles in global and local Ca2+ homeostasis and intracellular Ca2+ signaling in a wide variety of cell types and tissues. It is becoming clear that the spatiotemporal patterns of expression of the PMCAs and the fact that their abundances and relative expression levels vary from cell type to cell type both reflect and impact on their specific functions in these cells. Over recent years it has become increasingly apparent that these genes have potentially significant roles in human health and disease, with PMCAs1-4 being associated with cardiovascular diseases, deafness, autism, ataxia, adenoma, and malarial resistance. This review will bring together evidence of the variety of tissue-specific functions of PMCAs and will highlight the roles these genes play in regulating normal physiological functions and the considerable impact the genes have on human disease.
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Affiliation(s)
- Nicholas Stafford
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Claire Wilson
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Delvac Oceandy
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Ludwig Neyses
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Elizabeth J Cartwright
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
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9
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Diabetic Microvascular Disease and Pulmonary Fibrosis: The Contribution of Platelets and Systemic Inflammation. Int J Mol Sci 2016; 17:ijms17111853. [PMID: 27834824 PMCID: PMC5133853 DOI: 10.3390/ijms17111853] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/24/2016] [Accepted: 11/01/2016] [Indexed: 12/29/2022] Open
Abstract
Diabetes is strongly associated with systemic inflammation and oxidative stress, but its effect on pulmonary vascular disease and lung function has often been disregarded. Several studies identified restrictive lung disease and fibrotic changes in diabetic patients and in animal models of diabetes. While microvascular dysfunction is a well-known complication of diabetes, the mechanisms leading to diabetes-induced lung injury have largely been disregarded. We described the potential involvement of diabetes-induced platelet-endothelial interactions in perpetuating vascular inflammation and oxidative injury leading to fibrotic changes in the lung. Changes in nitric oxide synthase (NOS) activation and decreased NO bioavailability in the diabetic lung increase platelet activation and vascular injury and may account for platelet hyperreactivity reported in diabetic patients. Additionally, the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway has been reported to mediate pancreatic islet damage, and is implicated in the onset of diabetes, inflammation and vascular injury. Many growth factors and diabetes-induced agonists act via the JAK/STAT pathway. Other studies reported the contribution of the JAK/STAT pathway to the regulation of the pulmonary fibrotic process but the role of this pathway in the development of diabetic lung fibrosis has not been considered. These observations may open new therapeutic perspectives for modulating multiple pathways to mitigate diabetes onset or its pulmonary consequences.
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Tajeddine N. How do reactive oxygen species and calcium trigger mitochondrial membrane permeabilisation? Biochim Biophys Acta Gen Subj 2016; 1860:1079-88. [DOI: 10.1016/j.bbagen.2016.02.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 02/16/2016] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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11
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Bouron A, Chauvet S, Dryer S, Rosado JA. Second Messenger-Operated Calcium Entry Through TRPC6. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 898:201-49. [PMID: 27161231 DOI: 10.1007/978-3-319-26974-0_10] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Canonical transient receptor potential 6 (TRPC6) proteins assemble into heteromultimeric structures forming non-selective cation channels. In addition, many TRPC6-interacting proteins have been identified like some enzymes, channels, pumps, cytoskeleton-associated proteins, immunophilins, or cholesterol-binding proteins, indicating that TRPC6 are engaged into macromolecular complexes. Depending on the cell type and the experimental conditions used, TRPC6 activity has been reported to be controlled by diverse modalities. For instance, the second messenger diacylglycerol, store-depletion, the plant extract hyperforin or H2O2 have all been shown to trigger the opening of TRPC6 channels. A well-characterized consequence of TRPC6 activation is the elevation of the cytosolic concentration of Ca(2+). This latter response can reflect the entry of Ca(2+) through open TRPC6 channels but it can also be due to the Na(+)/Ca(2+) exchanger (operating in its reverse mode) or voltage-gated Ca(2+) channels (recruited in response to a TRPC6-mediated depolarization). Although TRPC6 controls a diverse array of biological functions in many tissues and cell types, its pathophysiological functions are far from being fully understood. This chapter covers some key features of TRPC6, with a special emphasis on their biological significance in kidney and blood cells.
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Affiliation(s)
- Alexandre Bouron
- Université Grenoble Alpes, 38000, Grenoble, France. .,CNRS, iRTSV-LCBM, 38000, Grenoble, France.
| | - Sylvain Chauvet
- Université Grenoble Alpes, 38000, Grenoble, France.,CNRS, iRTSV-LCBM, 38000, Grenoble, France
| | - Stuart Dryer
- University of Houston, Houston, TX, USA.,Baylor College of Medicine, Houston, TX, USA
| | - Juan A Rosado
- Departamento de Fisiología, University of Extremadura, Cáceres, Spain
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12
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Bolliger D, Filipovic M, Matt P, Tanaka KA, Gregor M, Zenklusen U, Seeberger MD, Lurati Buse G. Reduced aspirin responsiveness as assessed by impedance aggregometry is not associated with adverse outcome after cardiac surgery in a small low-risk cohort. Platelets 2015; 27:254-61. [PMID: 26367099 DOI: 10.3109/09537104.2015.1083969] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Reduced aspirin responsiveness (i.e. persistent high platelet reactivity in platelet function testing) might be associated with increased risk of myocardial ischemia and cardiac mortality in patients with coronary disease. However, the impact in patients undergoing coronary artery bypass grafting (CABG) is unclear. The aim of this prospective cohort study was to evaluate the predictive value of reduced aspirin responsiveness on cardiac and thromboembolic events in patients undergoing elective isolated CABG surgery with aspirin intake until at least two days before surgery. We included 304 patients in this prospective single-center cohort study. Impedance platelet aggregometry (Multiplate®) was performed directly before and on the first day after surgery. Reduced aspirin responsiveness was defined as area under the curve in ASPItest (AUCASPI) ≥300 U. The primary outcome was a composite of all-cause mortality and/or major adverse cardiac or thromboembolic events within 1 year. Reduced aspirin responsiveness was found in 13 and 24% of patients pre and postoperatively, respectively. There was no difference in the outcomes between patients with normal and reduced aspirin responsiveness in the preoperative measurement (log-rank test, p = 0.540). Multivariate analysis including logistic EuroSCORE I and postoperative troponin T levels did not show any association of reduced aspirin responsiveness with adverse outcome (hazard ratio, 0.576; (95% CI 0.128-2.585; p = 0.471). Similarly, postoperative reduced aspirin responsiveness was not associated with adverse events. To conclude, reduced aspirin responsiveness as evaluated by Multiplate® platelet function analyzer was not associated with increased incidence of major adverse cardiac and thromboembolic events and mortality after CABG surgery.
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Affiliation(s)
- Daniel Bolliger
- a Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy , University Hospital Basel , Basel , Switzerland
| | - Miodrag Filipovic
- a Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy , University Hospital Basel , Basel , Switzerland .,b Institute of Anesthesiology, Cantonal Hospital , St. Gallen , Switzerland
| | - Peter Matt
- c Division of Cardiac Surgery , University Hospital Basel , Basel , Switzerland
| | - Kenichi A Tanaka
- d Department of Anesthesiology, Cardiothoracic Anesthesia Division , University of Maryland , Baltimore , MD , USA , and
| | - Michael Gregor
- a Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy , University Hospital Basel , Basel , Switzerland
| | - Urs Zenklusen
- a Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy , University Hospital Basel , Basel , Switzerland .,c Division of Cardiac Surgery , University Hospital Basel , Basel , Switzerland
| | - Manfred D Seeberger
- a Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy , University Hospital Basel , Basel , Switzerland .,e Institute for Anesthesiology and Intensive Care, Hirslanden Klinik , Zurich , Switzerland
| | - Giovanna Lurati Buse
- a Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy , University Hospital Basel , Basel , Switzerland
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Kahya MC, Naziroğlu M, Çiğ B. Melatonin and selenium reduce plasma cytokine and brain oxidative stress levels in diabetic rats. Brain Inj 2015; 29:1490-6. [DOI: 10.3109/02699052.2015.1053526] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ewart MA, Kennedy S, Macmillan D, Raja ALN, Watt IM, Currie S. Altered vascular smooth muscle function in the ApoE knockout mouse during the progression of atherosclerosis. Atherosclerosis 2014; 234:154-61. [PMID: 24657385 PMCID: PMC3997800 DOI: 10.1016/j.atherosclerosis.2014.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 01/29/2014] [Accepted: 02/18/2014] [Indexed: 02/07/2023]
Abstract
Objectives Relaxation of vascular smooth muscle (VSM) requires re-uptake of cytosolic Ca2+ into the sarcoplasmic reticulum (SR) via the Sarco/Endoplasmic Reticulum Ca2+ ATPase (SERCA), or extrusion via the Plasma Membrane Ca2+ ATPase (PMCA) or sodium Ca2+ exchanger (NCX). Peroxynitrite, a reactive species formed in vascular inflammatory diseases, upregulates SERCA activity to induce relaxation but, chronically, can contribute to atherogenesis and altered vascular function by escalating endoplasmic reticulum stress. Our objectives were to determine if peroxynitrite-induced relaxation and Ca2+ handling processes within vascular smooth muscle cells were altered as atherosclerosis develops. Methods Aortae from control and ApoE−/− mice were studied histologically, functionally and for protein expression levels of SERCA and PMCA. Ca2+ responses were assessed in dissociated aortic smooth muscle cells in the presence and absence of extracellular Ca2+. Results Relaxation to peroxynitrite was concentration-dependent and endothelium-independent. The abilities of the SERCA blocker thapsigargin and the PMCA inhibitor carboxyeosin to block this relaxation were altered during fat feeding and plaque progression. SERCA levels were progressively reduced, while PMCA expression was upregulated. In ApoE−/− VSM cells, increases in cytosolic Ca2+ [Ca2+]c in response to SERCA blockade were reduced, while SERCA-independent Ca2+ clearance was faster compared to control. Conclusion As atherosclerosis develops in the ApoE−/− mouse, expression and function of Ca2+ handling proteins are altered. Up-regulation of Ca2+ removal via PMCA may offer a potential compensatory mechanism to help normalise the dysfunctional relaxation observed during disease progression. Expression and function of SERCA and PMCA are temporally altered in ApoE−/− VSM. TG-induced increases in [Ca2+]c were reduced in ApoE−/− aortic SM cells. Ca2+ extrusion is upregulated in isolated ApoE−/− aortic SM cells.
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Affiliation(s)
- Marie-Ann Ewart
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, G12 8QQ, UK.
| | - Simon Kennedy
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, G12 8QQ, UK
| | - Debbi Macmillan
- Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, Glasgow G4 0NR, UK
| | - Abhirami L N Raja
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, G12 8QQ, UK
| | - Ian M Watt
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, G12 8QQ, UK
| | - Susan Currie
- Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, Glasgow G4 0NR, UK
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15
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Berna-Erro A, Albarran L, Dionisio N, Redondo PC, Alonso N, Gomez LJ, Salido GM, Rosado JA. The canonical transient receptor potential 6 (TRPC6) channel is sensitive to extracellular pH in mouse platelets. Blood Cells Mol Dis 2014; 52:108-15. [DOI: 10.1016/j.bcmd.2013.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 08/20/2013] [Indexed: 01/12/2023]
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16
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Horáková L, Strosova MK, Spickett CM, Blaskovic D. Impairment of calcium ATPases by high glucose and potential pharmacological protection. Free Radic Res 2013; 47 Suppl 1:81-92. [PMID: 23710650 DOI: 10.3109/10715762.2013.807923] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The review deals with impairment of Ca(2+)-ATPases by high glucose or its derivatives in vitro, as well as in human diabetes and experimental animal models. Acute increases in glucose level strongly correlate with oxidative stress. Dysfunction of Ca(2+)-ATPases in diabetic and in some cases even in nondiabetic conditions may result in nitration of and in irreversible modification of cysteine-674. Nonenyzmatic protein glycation might lead to alteration of Ca(2+)-ATPase structure and function contributing to Ca(2+) imbalance and thus may be involved in development of chronic complications of diabetes. The susceptibility to glycation is probably due to the relatively high percentage of lysine and arginine residues at the ATP binding and phosphorylation domains. Reversible glycation may develop into irreversible modifications (advanced glycation end products, AGEs). Sites of SERCA AGEs are depicted in this review. Finally, several mechanisms of prevention of Ca(2+)-pump glycation, and their advantages and disadvantages are discussed.
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Affiliation(s)
- L Horáková
- Institute of Experimental Pharmacology and Toxicology, SAS, Bratislava, Slovakia.
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Rollini F, Franchi F, Muñiz-Lozano A, Angiolillo DJ. Platelet function profiles in patients with diabetes mellitus. J Cardiovasc Transl Res 2013; 6:329-45. [PMID: 23404189 DOI: 10.1007/s12265-013-9449-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 01/25/2013] [Indexed: 12/22/2022]
Abstract
Patients with diabetes mellitus (DM) are at high risk for several cardiovascular disorders such as coronary heart disease, stroke, peripheral arterial disease, and congestive heart failure. DM has reached epidemic proportions and its strong association with coronary artery disease is responsible for increased cardiovascular morbidity and mortality. DM patients are characterized by platelet hyperreactivity, which contribute to the enhanced atherothrombotic risk of these subjects. Several mechanisms are involved in the hyperreactive platelet phenotype characterizing DM patients. Furthermore, a large proportion of DM patients show inadequate response to standard antiplatelet treatments and high rate of adverse recurrent cardiovascular events despite compliance with standard antiplatelet treatment regimens. Therefore, new antiplatelet treatment regimens are warranted in DM patients to reduce their atherothrombotic risk. The present manuscript provides an overview on the current status of knowledge on platelet function profiles in patients with DM and therapeutic considerations.
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Affiliation(s)
- Fabiana Rollini
- University of Florida College of Medicine-Jacksonville, 655 West 8th Street, Jacksonville, FL 32209, USA
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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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19
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Arthur JF, Shen Y, Chen Y, Qiao J, Ni R, Lu Y, Andrews RK, Gardiner EE, Cheng J. Exacerbation of glycoprotein VI-dependent platelet responses in a rhesus monkey model of Type 1 diabetes. J Diabetes Res 2013; 2013:370212. [PMID: 23841102 PMCID: PMC3690249 DOI: 10.1155/2013/370212] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 05/07/2013] [Indexed: 11/17/2022] Open
Abstract
Thrombosis is a life-threatening complication of diabetes. Platelet reactivity is crucial to thrombus formation, particularly in arterial vessels and in thrombotic complications causing myocardial infarction or ischaemic stroke, but diabetic patients often respond poorly to current antiplatelet medication. In this study, we used a nonhuman primate model of Type 1 diabetes to measure early downstream signalling events following engagement of the major platelet collagen receptor, glycoprotein (GP)VI. Diabetic monkeys were given enough insulin to maintain their blood glucose levels either at ~8 mM (well-controlled diabetes) or ~15 mM (poorly controlled diabetes). Flow cytometric analysis was used to measure platelet reactive oxygen species (ROS) generation, calcium mobilisation, receptor surface expression, and immature platelet fraction. We observed exacerbated intracellular ROS and calcium flux associated with engagement of GPVI in monkeys with poorly controlled diabetes. GPVI surface levels did not differ between healthy monkeys or the two diabetic groups. Treatment of platelets with the specific Syk inhibitor BAY61-3606 inhibited GPVI-dependent ROS and, importantly, reduced ROS generation in the poorly controlled diabetes group to that observed in healthy monkeys. These data indicate that glycaemic control is important in reducing GPVI-dependent platelet hyperreactivity and point to a potential antithrombotic therapeutic benefit of Syk inhibition in hyperglycaemic diabetes.
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Affiliation(s)
- J. F. Arthur
- Australian Centre for Blood Diseases, Alfred Medical Research & Education Precinct (AMREP), Monash University, Melbourne, VIC 3004, Australia
- *J. F. Arthur: and
| | - Y. Shen
- Australian Centre for Blood Diseases, Alfred Medical Research & Education Precinct (AMREP), Monash University, Melbourne, VIC 3004, Australia
| | - Y. Chen
- Key Laboratory of Transplant Engineering and Immunology, West China Hospital, Ministry of Health, Sichuan University, Chengdu 610041, China
| | - J. Qiao
- Australian Centre for Blood Diseases, Alfred Medical Research & Education Precinct (AMREP), Monash University, Melbourne, VIC 3004, Australia
| | - R. Ni
- Key Laboratory of Transplant Engineering and Immunology, West China Hospital, Ministry of Health, Sichuan University, Chengdu 610041, China
| | - Y. Lu
- Key Laboratory of Transplant Engineering and Immunology, West China Hospital, Ministry of Health, Sichuan University, Chengdu 610041, China
- *Y. Lu:
| | - R. K. Andrews
- Australian Centre for Blood Diseases, Alfred Medical Research & Education Precinct (AMREP), Monash University, Melbourne, VIC 3004, Australia
| | - E. E. Gardiner
- Australian Centre for Blood Diseases, Alfred Medical Research & Education Precinct (AMREP), Monash University, Melbourne, VIC 3004, Australia
| | - J. Cheng
- Key Laboratory of Transplant Engineering and Immunology, West China Hospital, Ministry of Health, Sichuan University, Chengdu 610041, China
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20
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Alexandru N, Popov D, Georgescu A. Platelet dysfunction in vascular pathologies and how can it be treated. Thromb Res 2011; 129:116-26. [PMID: 22035630 DOI: 10.1016/j.thromres.2011.09.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Revised: 09/19/2011] [Accepted: 09/22/2011] [Indexed: 12/17/2022]
Abstract
Cardiovascular diseases are one of the leading causes of morbidity and mortality in industrialized countries, and although many processes play a role in the development of vascular disease, thrombosis is the primary event that precipitates stroke and acute coronary syndromes. The blood platelets are of significant importance in medicine. These cells are involved in many physiological processes, particularly haemostasis through their ability to aggregate and form clots in response to activation. In addition, these dynamic cells display activities that extend beyond thrombosis, including an important role in initiating and sustaining vascular inflammation. The expansion of knowledge from basic and clinical research has highlighted the critical position of platelets in several inflammatory diseases such as arthritis and atherosclerosis. Platelets are emerging as important mediators of inflammation and provide important signals to mediate phenotype of other blood and vascular cells. The important role of platelets in arterial thrombosis and the onset of acute myocardial infarction after atherosclerotic plaque rupture make inhibition of platelet aggregation a critical step in preventing thrombotic events associated with stroke, heart attack, and peripheral arterial thrombosis. However, the use of platelet inhibitors for thrombosis prevention must seek a delicate balance between inhibiting platelet activation and an associated increased bleeding risk. The aim of this review is to up-date the knowledge on platelets physiology and dysfunction in pathologies, such as diabetes mellitus, hypercholesterolemia, and hypertension, emphasizing the link between platelets and the inflammation-related atherosclerosis. The review evaluates the opportunities offered by the novel platelet inhibitors to efficiently alleviate the thrombotic events.
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21
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Kakouros N, Rade JJ, Kourliouros A, Resar JR. Platelet function in patients with diabetes mellitus: from a theoretical to a practical perspective. Int J Endocrinol 2011; 2011:742719. [PMID: 21869886 PMCID: PMC3159301 DOI: 10.1155/2011/742719] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Accepted: 06/22/2011] [Indexed: 11/24/2022] Open
Abstract
Patients with diabetes mellitus have an increased prevalence of vascular disease. Pathologic thrombosis associated with atherosclerotic plaque rupture is a major cause of morbidity and mortality. Platelets are intimately involved in the initiation and propagation of thrombosis. Evidence suggests that platelets from patients with type 2 diabetes have increased reactivity and baseline activation compared to healthy controls. We review the pathophysiology of platelet hyperreactivity in DM patients and its implications in clinical practice, with particular focus on acute coronary syndromes, percutaneous coronary intervention, and novel antiplatelet agents.
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Affiliation(s)
- Nicholaos Kakouros
- Johns Hopkins University School of Medicine, and Johns Hopkins Hospital Division of Cardiovascular Disease, Baltimore, MD 21287-073, USA
- *Nicholaos Kakouros:
| | - Jeffrey J. Rade
- Johns Hopkins University School of Medicine, and Johns Hopkins Hospital Division of Cardiovascular Disease, Baltimore, MD 21287-073, USA
| | | | - Jon R. Resar
- Johns Hopkins University School of Medicine, and Johns Hopkins Hospital Division of Cardiovascular Disease, Baltimore, MD 21287-073, USA
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22
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Galan C, Jardín I, Dionisio N, Salido G, Rosado JA. Role of oxidant scavengers in the prevention of Ca²+ homeostasis disorders. Molecules 2010; 15:7167-87. [PMID: 20953160 PMCID: PMC6259185 DOI: 10.3390/molecules15107167] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 09/09/2010] [Accepted: 10/14/2010] [Indexed: 02/07/2023] Open
Abstract
A number of disorders, such as Alzheimer disease and diabetes mellitus, have in common the alteration of the redox balance, resulting in an increase in reactive oxygen species (ROS) generation that might lead to the development of apoptosis and cell death. It has long been known that ROS can significantly alter Ca²+ mobilization, an intracellular signal that is involved in the regulation of a wide variety of cellular functions. Cells have a limited capability to counteract the effects of oxidative stress, but evidence has been provided supporting the beneficial effects of exogenous ROS scavengers. Here, we review the effects of oxidative stress on intracellular Ca²+ homeostasis and the role of antioxidants in the prevention and treatment of disorders associated to abnormal Ca²+ mobilization induced by ROS.
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Affiliation(s)
| | | | | | | | - Juan A. Rosado
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +34 927257139; Fax: +34 927257110
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23
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Abstract
Patients with diabetes mellitus (DM) have accelerated atherosclerosis, which is the main underlying factor contributing to the high risk of atherothrombotic events in these patients. Atherothrombotic complications are the leading cause of morbidity and mortality in patients with DM. Among factors contributing to the prothrombotic condition which characterise patients with DM, platelet hyperreactivity plays a pivotal role. Platelets of DM patients are characterised by dysregulation of several signalling pathways leading to intensified adhesion, activation and aggregation. Multiple mechanisms are involved in platelet dysfunction of patients with DM, which can be categorised as follows: a) hyperglycaemia, b) insulin deficiency and resistance, c) associated metabolic conditions, and d) other cellular abnormalities.The present manuscript aims to provide an overview on the current status of knowledge on platelet abnormalities that characterise patients with DM.
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Affiliation(s)
- José Luis Ferreiro
- IDIBELL-Hospital Universitari de Bellvitge, Department of Cardiology, Interventional Cardiology Unit, L'Hospitalet de Llobregat, Barcelona, Spain
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24
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Chapado L, Linares-Palomino PJ, Salido S, Altarejos J, Rosado JA, Salido GM. Synthesis and evaluation of the platelet antiaggregant properties of phenolic antioxidants structurally related to rosmarinic acid. Bioorg Chem 2010; 38:108-14. [PMID: 20042216 DOI: 10.1016/j.bioorg.2009.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 12/02/2009] [Indexed: 10/20/2022]
Abstract
Polyphenols, such as rosmarinic acid, are widely distributed natural products with relevant antioxidant activity. Oxidative stress plays an important role in the pathogenesis of a number of disorders. Here, we report on the synthesis and biological effects of the polyphenolic esters hydroxytyrosyl gallate (1), hydroxytyrosyl protocatechuate (2) and hydroxytyrosyl caffeate (3), structurally related to rosmarinic acid. The three compounds showed a greater free radical scavenging activity than their precursors and also than rosmarinic acid. Esters 1 and 3 significantly reduced thrombin-evoked platelet aggregation, which is likely mediated to the attenuation of thrombin-stimulated Ca(2+) release and entry. The three compounds reduced the ability of platelets to accumulate Ca(2+) in the intracellular stores, probably by enhancing the Ca(2+) leakage rate and reduced store-operated Ca(2+) entry in these cells. These observations suggest that the structurally-simplified analogs to rosmarinic acid, compounds 1 and 3, might be the base of therapeutic strategies to prevent thrombotic complications associated to platelet hyperaggregability due to oxidative stress.
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Affiliation(s)
- Laura Chapado
- Department of Inorganic and Organic Chemistry, University of Jaén, Spain.
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25
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Sobotková A, Mášová-Chrastinová L, Suttnar J, Štikarová J, Májek P, Reicheltová Z, Kotlín R, Weisel JW, Malý M, Dyr JE. Antioxidants change platelet responses to various stimulating events. Free Radic Biol Med 2009; 47:1707-14. [PMID: 19766712 PMCID: PMC2854508 DOI: 10.1016/j.freeradbiomed.2009.09.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 09/11/2009] [Accepted: 09/14/2009] [Indexed: 11/15/2022]
Abstract
The role of platelets in hemostasis may be influenced by alteration of the platelet redox state-the presence of antioxidants and the formation of reactive oxygen and nitrogen species. We investigated the effects of two antioxidants, resveratrol and trolox, on platelet activation. Trolox and resveratrol inhibited aggregation of washed platelets and platelet-rich plasma activated by ADP, collagen, and thrombin receptor-activating peptide. Resveratrol was a more effective agent in reducing platelet static and dynamic adhesion in comparison with trolox. The antioxidant capacity of resveratrol was, however, the same as that of trolox. After incubation of platelets with antioxidants, the resveratrol intraplatelet concentration was about five times lower than the intracellular concentration of trolox. Although both antioxidants comparably lowered hydroxyl radical and malondialdehyde production in platelets stimulated with collagen, TxB(2) levels were decreased by resveratrol much more effectively than by trolox. Cyclooxygenase 1 was inhibited by resveratrol and not by trolox. Our data indicate that antioxidants, apart from nonspecific redox or radical-quenching mechanisms, inhibit platelet activation also by specific interaction with target proteins. The results also show the importance of studying platelet activation under conditions of real blood flow in contact with reactive surfaces, e.g., using dynamic adhesion experiments.
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Affiliation(s)
- Alžběta Sobotková
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
| | - Leona Mášová-Chrastinová
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
- Corresponding author. Fax: +42 0221977208. (L. Mášová-Chrastinová)
| | - Jiří Suttnar
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
| | - Jana Štikarová
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
| | - Pavel Májek
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
| | - Zuzana Reicheltová
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
| | - Roman Kotlín
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
| | - John W. Weisel
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6058, USA
| | - Martin Malý
- Department of Cardiology, Motol University Hospital, V úvalu 84, 15006 Prague 5, Czech Republic
| | - Jan E. Dyr
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 00 Prague 2, Czech Republic
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26
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Sill JC, Proper JA, Johnson ME, Uhl CB, Katusic ZS. Reactive oxygen species and human platelet GP IIb/IIIa receptor activation. Platelets 2009; 18:613-9. [DOI: 10.1080/09537100701481385] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Alexandru N, Jardín I, Popov D, Simionescu M, García-Estañ J, Salido GM, Rosado JA. Effect of homocysteine on calcium mobilization and platelet function in type 2 diabetes mellitus. J Cell Mol Med 2009; 12:2586-97. [PMID: 18088391 PMCID: PMC3828875 DOI: 10.1111/j.1582-4934.2008.00195.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Type 2 diabetes mellitus induces a characteristic platelet hyperactivity that might be due to several factors including oxidative stress and abnormal intracellular Ca2+ homeostasis. Hyperhomocysteinaemia is considered a risk factor in the development of thrombosis although its effect on platelet function and the mechanisms involved are still poorly understood. Here we show that homocysteine (Hcy) induce a concentration-dependent increase in endogenous production of reactive oxygen species (ROS), which was significantly greater in platelets from diabetic patients than in controls. Platelet treatment with Hcy resulted in Ca2+ release from the dense tubular system and the acidic stores. Ca2+ mobilisation-induced by Hcy consisted in two components, an initial slow increase in intracellular free Ca2+ concentration ([Ca2+]i) and a rapid and marked increase in [Ca2+]i, the second leading to the activation of platelet aggregation. As well as ROS generation, Ca2+ mobilization and platelet aggregation were significantly greater in platelets from diabetic donors than in controls, which indicate that platelets from diabetic donors are more sensitive to Hcy. These findings, together with the hyperhomocysteinaemia reported in diabetic patients, strongly suggest that Hcy might be considered a risk factor in the development of cardiovascular complications associated to type 2 diabetes mellitus.
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Affiliation(s)
- N Alexandru
- Institute of Cellular Biology and Pathology N. Simionescu, Bucharest, Romania
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28
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Alexandru N, Jardín I, Popov D, Simionescu M, García-Estañ J, Salido GM, Rosado JA. Effect of homocysteine on calcium mobilization and platelet function in type 2 diabetes mellitus. J Cell Mol Med 2009; 12:2015-26. [PMID: 19012728 PMCID: PMC4506167 DOI: 10.1111/j.1582-4934.2008.00200.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Type 2 diabetes mellitus induces a characteristic platelet hyperactivity that might be due to several factors including oxidativ stress and abnormal intracellular Ca2+ homeostasis. Hyperhomocysteinaemia is considered a risk factor in the development of thrombosis although its effect on platelet function and the mechanisms involved are still poorly understood. Here we show tha homocysteine induce a concentration-dependent increase in endogenous production of reactive oxygen species (ROS), which was significantly greater in platelets from diabetic patients than in controls. Platelet treatment with homocysteine resulted in Ca2+ release from the dense tubular system and the acidic stores. Ca2+ mobilization-induced by homocysteine consisted in two components, an initial slow increase in intracellular free Ca + concentration ([Ca +]i) and a rapid and marked increase in [Ca2+]i, th second leading to the activation of platelet aggregation. As well as ROS generation, Ca2+ mobilization and platelet aggregation were significantly greater in platelets from diabetic donors than in controls, which indicate that platelets from diabetic donors are more sensitive to homocysteine. These findings, together with the hyperhomocysteinaemia reported in diabetic patients, strongly suggest that homocysteine might be considered a risk factor in the development of cardiovascular complications associated to type 2 diabetes mellitus.
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Affiliation(s)
- N Alexandru
- Institute of Cellular Biology and Pathology N. Simionescu, Bucharest, Romania
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29
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Zbidi H, Salido S, Altarejos J, Perez-Bonilla M, Bartegi A, Rosado JA, Salido GM. Olive tree wood phenolic compounds with human platelet antiaggregant properties. Blood Cells Mol Dis 2009; 42:279-85. [PMID: 19195914 DOI: 10.1016/j.bcmd.2009.01.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2008] [Accepted: 01/07/2009] [Indexed: 12/23/2022]
Abstract
Oleuropein and (+)-cycloolivil are natural polyphenolic compounds with a significant radical scavenging activity present in olive tree. We have investigated the antiaggregant effects of oleuropein and (+)-cycloolivil isolated from an ethyl acetate extract of olive tree wood. Oleuropein and (+)-cycloolivil reduced the ability of thrombin to stimulate platelet aggregation. Both compounds reduced thrombin-evoked Ca(2+) release and entry to a similar extent to hydroxytyrosol. This effect was greater in platelets from patients with type 2 diabetes mellitus than in controls. Thrombin-, thapsigargin- and 2,5-di-(tert-butyl)-1,4-hydroquinone (TBHQ)-evoked protein tyrosine phosphorylation, which is involved in Ca(2+) signalling and platelet aggregation, is inhibited by oleuropein and (+)-cycloolivil. oleuropein and (+)-cycloolivil are natural oxygen radical scavengers that reduce thrombin-induced protein tyrosine phosphorylation, Ca(2+) signalling and platelet aggregation. These observations suggest that oleuropein and (+)-cycloolivil may prevent thrombotic complications associated to platelet hyperaggregability and be the base for the development of antiaggregant therapeutic strategies.
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Affiliation(s)
- Hanene Zbidi
- Unité de Recherche de Biochimie, Institut Supérieur de Biotechnologie, 5019-Monastir, Tunisia
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31
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El Haouari M, Jardin I, Mekhfi H, Rosado JA, Salido GM. Urtica dioica extract reduces platelet hyperaggregability in type 2 diabetes mellitus by inhibition of oxidant production, Ca 2+ mobilization and protein tyrosine phosphorylation. J Appl Biomed 2007. [DOI: 10.32725/jab.2007.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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32
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Bouaziz A, Salido S, Linares-Palomino PJ, Sanchez A, Altarejos J, Bartegi A, Salido GM, Rosado JA. Cinnamtannin B-1 from bay wood reduces abnormal intracellular Ca2+ homeostasis and platelet hyperaggregability in type 2 diabetes mellitus patients. Arch Biochem Biophys 2006; 457:235-42. [PMID: 17118329 DOI: 10.1016/j.abb.2006.10.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Revised: 10/18/2006] [Accepted: 10/18/2006] [Indexed: 12/28/2022]
Abstract
Type 2 diabetes mellitus induces a number of cardiovascular disorders, including platelet hyperactivity and hyperaggregability, which is associated to an increased oxidant production and abnormal cytosolic Ca2+ mobilization. In the present study, we have investigated the effect of cinnamtannin B-1 obtained from bay wood on oxidants production, Ca2+ mobilization and aggregation in platelets from type 2 diabetic donors. Pretreatment of platelets with cinnamtannin B-1 reversed the enhanced oxidants production and Ca2+ mobilization, including Ca2+ entry, evoked by thapsigargin plus ionomycin or thrombin, observed in platelets from diabetic subjects, so that in the presence of cinnamtannin B-1 Ca2+ entry was similar in platelets from healthy and diabetic subjects. In addition, cinnamtannin B-1 reduced thrombin-induced aggregation in platelets from type 2 diabetic subjects. We conclude that cinnamtannin B-1 exerts an effective antioxidant action in platelets from patients with type 2 diabetes mellitus and reverses the enhanced Ca2+ mobilization and hyperaggregability.
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Affiliation(s)
- A Bouaziz
- Unité de Recherche de Biochimie, Institut Supérieur de Biotechnologie, 5019 Monastir, Tunisia
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