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Makarov MS, Storozheva MV. Regulation of Human Platelet Adhesion with Ascorbic Acid. Bull Exp Biol Med 2022; 174:280-282. [PMID: 36598667 DOI: 10.1007/s10517-023-05690-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Indexed: 01/05/2023]
Abstract
Morphofunctional characteristics of human platelets in the presence of 0.1-5 mM ascorbic acid were studied. The platelet ability to form lamellae and the preservation of granules in platelets in suspension and during adhesion were evaluated. Ascorbic acid in concentrations of 0.1-1 mM induced no visible changes in platelet structure and did not affect their adhesion activity, but suppressed lamella growth and degranulation in adherent platelets in a dose-dependent manner. The maximum preservation of granules was revealed in the presence of 0.5 mM ascorbic acid (55% in 1 h from the moment of adhesion). In the presence of 2-5 mM ascorbic acid, spontaneous activation and degranulation of platelets was observed. Thus, ascorbic acid is capable of both suppressing and stimulating platelet activity. In concentrations of 0.5-1 mM ascorbic acid can be used to stabilize granules in adherent platelets.
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Affiliation(s)
- M S Makarov
- N. V. Sklifosovsky Research Institute of Emergency Medicine, Moscow Health Department, Moscow, Russia.
| | - M V Storozheva
- N. V. Sklifosovsky Research Institute of Emergency Medicine, Moscow Health Department, Moscow, Russia
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Lorenzen I, Eble JA, Hanschmann EM. Thiol switches in membrane proteins - Extracellular redox regulation in cell biology. Biol Chem 2020; 402:253-269. [PMID: 33108336 DOI: 10.1515/hsz-2020-0266] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/17/2020] [Indexed: 12/11/2022]
Abstract
Redox-mediated signal transduction depends on the enzymatic production of second messengers such as hydrogen peroxide, nitric oxide and hydrogen sulfite, as well as specific, reversible redox modifications of cysteine-residues in proteins. So-called thiol switches induce for instance conformational changes in specific proteins that regulate cellular pathways e.g., cell metabolism, proliferation, migration, gene expression and inflammation. Reduction, oxidation and disulfide isomerization are controlled by oxidoreductases of the thioredoxin family, including thioredoxins, glutaredoxins, peroxiredoxins and protein dsisulfide isomerases. These proteins are located in different cellular compartments, interact with substrates and catalyze specific reactions. Interestingly, some of these proteins are released by cells. Their extracellular functions and generally extracellular redox control have been widely underestimated. Here, we give an insight into extracellular redox signaling, extracellular thiol switches and their regulation by secreted oxidoreductases and thiol-isomerases, a topic whose importance has been scarcely studied so far, likely due to methodological limitations. We focus on the secreted redox proteins and characterized thiol switches in the ectodomains of membrane proteins, such as integrins and the metalloprotease ADAM17, which are among the best-characterized proteins and discuss their underlying mechanisms and biological implications.
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Affiliation(s)
- Inken Lorenzen
- Centre of Biochemistry and Molecular Biology, Structural Biology, Christian-Albrecht University of Kiel, Am Botanischen Garten 1-9, D-24118Kiel, Germany
| | - Johannes A Eble
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Waldeyerstr. 15, D-48149Münster, Germany
| | - Eva-Maria Hanschmann
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Life Science Center, Merowingerplatz 1a, D-40225Düsseldorf, Germany
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Nitrosative stress affects the interaction of integrin alphaIIbbeta3 with its ligands. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183198. [DOI: 10.1016/j.bbamem.2020.183198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/13/2020] [Accepted: 01/15/2020] [Indexed: 11/17/2022]
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Rosenberg N, Mor-Cohen R, Sheptovitsky VH, Romanenco O, Hess O, Lahav J. Integrin-mediated cell adhesion requires extracellular disulfide exchange regulated by protein disulfide isomerase. Exp Cell Res 2019; 381:77-85. [PMID: 31042499 DOI: 10.1016/j.yexcr.2019.04.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/26/2019] [Accepted: 04/14/2019] [Indexed: 01/28/2023]
Abstract
Cell adhesion to extracellular matrix, mediated by integrin receptors, is crucial for cell survival. Receptor-ligand interaction involves conformational changes in the integrin by a mechanism not fully elucidated. In addition to several direct evidence that there is disulfide re-arrangement of integrins, we previously demonstrated a role for extracellular thiols and protein disulfide isomerase (PDI) in integrin-mediated functions using platelets as model system. Exploring the possible generality of this mechanism, we now show, using three different nucleated cells which depend on adhesion for survival, that non-penetrating blockers of free thiols inhibit α2β1 and α5β1 integrin-mediated adhesion and that disulfide exchange takes place in that process. Inhibiting extracellular PDI mimics thiol blocking. Transfection with WT or enzymatically inactive PDI increased their membrane expression and enhanced cell adhesion, suggesting that PDI level is a limiting factor and that the chaperone activity of the enzyme contributes to adhesion. Exogenously added PDI also enhanced adhesion, further supporting the limiting factor of the enzyme. These data indicate that: a) Dependence on ecto-sulfhydryls for integrin-mediated adhesion is not exclusive to the platelet; b) PDI is involved in integrin-mediated adhesion, catalyzing disulfide bond exchange; c) PDI enhances cell adhesion by both its oxidoreductase activity and as a chaperone.
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Affiliation(s)
- Nurit Rosenberg
- The Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel-Hashomer and Dept. of Hematology, Sackler School of Medicine, Tel Aviv University, Israel.
| | - Ronit Mor-Cohen
- The Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel-Hashomer and Dept. of Hematology, Sackler School of Medicine, Tel Aviv University, Israel
| | - Vera Hazan Sheptovitsky
- Hemostasis Laboratory, Rabin Medical Center-Beilinson Hospital, Petah-Tiqva, and Dept. of Human Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Israel
| | - Olga Romanenco
- Hemostasis Laboratory, Rabin Medical Center-Beilinson Hospital, Petah-Tiqva, and Dept. of Human Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Israel
| | - Oded Hess
- Hemostasis Laboratory, Rabin Medical Center-Beilinson Hospital, Petah-Tiqva, and Dept. of Human Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Israel
| | - Judith Lahav
- Hemostasis Laboratory, Rabin Medical Center-Beilinson Hospital, Petah-Tiqva, and Dept. of Human Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Israel
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Association of Oxidative Stress and Platelet Receptor Glycoprotein GPIbα and GPVI Shedding During Nonsurgical Bleeding in Heart Failure Patients With Continuous-Flow Left Ventricular Assist Device Support. ASAIO J 2019; 64:462-471. [PMID: 28953486 DOI: 10.1097/mat.0000000000000680] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Nonsurgical bleeding (NSB) in heart failure (HF) patients with continuous-flow left ventricular assist device (CF-LVAD) support is the most common clinical complication. The aim of this study was to investigate the association between oxidative stress and platelet glycoproteins GPIbα and GPVI shedding on the incidence of NSB in CF-LVAD patients. Fifty-one HF patients undergoing CF-LVAD implantation and 11 healthy volunteers were recruited. Fourteen patients developed NSB (bleeder group) during 1 month follow-up duration, while others were considered nonbleeder group (n = 37). Several biomarkers of oxidative stress were quantified at baseline and weekly intervals in all patients. Surface expression and plasma elements of platelet receptor glycoproteins GPIbα and GPVI were measured. Oxidative stress biomarkers and platelet GPIbα and GPVI receptor-shedding (decreased surface expression and higher plasma levels) were found to be preexisting conditions in baseline samples of both groups of HF patients when compared with healthy volunteers. Significantly elevated oxidative stress biomarkers and platelet glycoprotein receptor shedding were observed in postimplant bleeder group temporarily when compared with nonbleeder group. Strong significant associations between biomarkers of oxidative stress and platelet glycoprotein receptor shedding were observed, suggesting a possible role of oxidative stress in platelet integrin shedding leading to NSB in CF-LVAD patients. Receiver operating characteristic analyses of GPIbα and GPVI indicated that the likelihood of NSB had a predictive power of bleeding complication in CF-LVAD patients. In conclusion, elevated oxidative stress may play a role in GPIbα and GPVI shedding in the event of NSB. Thus, oxidative stress and GPIbα and GPVI shedding may be used as potential biomarkers for bleeding risk stratification in those patients.
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Abstract
Thiol isomerases are multifunctional enzymes that influence protein structure via their oxidoreductase, isomerase, and chaperone activities. These enzymes localize at high concentrations in the endoplasmic reticulum of all eukaryotic cells where they serve an essential function in folding nascent proteins. However, thiol isomerases can escape endoplasmic retention and be secreted and localized on plasma membranes. Several thiol isomerases including protein disulfide isomerase, ERp57, and ERp5 are secreted by and localize to the membranes of platelets and endothelial cells. These vascular thiol isomerases are released following vessel injury and participate in thrombus formation. Although most of the activities of vascular thiol isomerases that contribute to thrombus formation are yet to be defined at the molecular level, allosteric disulfide bonds that are modified by thiol isomerases have been described in substrates such as αIIbβ3, αvβ3, GPIbα, tissue factor, and thrombospondin. Vascular thiol isomerases also act as redox sensors. They respond to the local redox environment and influence S-nitrosylation of surface proteins on platelets and endothelial cells. Despite our rudimentary understanding of the mechanisms by which thiol isomerases control vascular function, the clinical utility of targeting them in thrombotic disorders is already being explored in clinical trials.
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Inhibition of thiol isomerase activity diminishes endothelial activation of plasminogen, but not of protein C. Thromb Res 2015; 135:748-53. [PMID: 25700620 DOI: 10.1016/j.thromres.2015.01.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 01/14/2015] [Accepted: 01/31/2015] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Cell surface thiol isomerase enzymes, principally protein disulphide isomerase (PDI), have emerged as important regulators of platelet function and tissue factor activation via their action on allosteric disulphide bonds. Allosteric disulphides are present in other haemostasis-related proteins, and we have therefore investigated whether thiol isomerase inhibition has any influence on two endothelial activities relevant to haemostatic regulation, namely activation of protein C and activation of plasminogen, with subsequent fibrinolysis. MATERIALS AND METHODS The study was performed using the human microvascular endothelial cell line HMEC-1. Thiol isomerase gene expression was measured by RT-PCR and activation of protein C and plasminogen by cell-based assays using chromogenic substrates S2366 and S2251, respectively. Cell mediated fibrinolysis was measured by monitoring absorbance at 405 nm following fibrin clot formation on the surface of HMEC-1 monolayers. RESULTS AND CONCLUSIONS A variety of thiol isomerase enzymes, including PDI, were expressed by HMEC-1 cells and thiol reductase activity detectable on the cell surface was inhibited by both RL90 anti-PDI antibody and by the PDI inhibitor quercetin-3-rutinoside (rutin). In cell-based assays, activation of plasminogen, but not of protein C, was inhibited by RL90 antibody and, to a lesser extent, by rutin. Fibrin clot lysis occurring on a HMEC-1 monolayer was also significantly slowed by RL90 antibody and by rutin, but RL90-mediated inhibition was abolished in the presence of exogenous tissue plasminogen activator (tPA). We conclude that thiol isomerases, including PDI, are involved in fibrinolytic regulation at the endothelial surface, although not via a direct action on tPA. These findings broaden understanding of haemostatic regulation by PDI, and may aid in development of novel anti-thrombotic therapeutic strategies targeted via the fibrinolysis system.
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Ali Khan H, Mutus B. Protein disulfide isomerase a multifunctional protein with multiple physiological roles. Front Chem 2014; 2:70. [PMID: 25207270 PMCID: PMC4144422 DOI: 10.3389/fchem.2014.00070] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 08/07/2014] [Indexed: 11/19/2022] Open
Abstract
Protein disulfide isomerase (PDI), is a member of the thioredoxin superfamily of redox proteins. PDI has three catalytic activities including, thiol-disulfide oxireductase, disulfide isomerase and redox-dependent chaperone. Originally, PDI was identified in the lumen of the endoplasmic reticulum and subsequently detected at additional locations, such as cell surfaces and the cytosol. This review will provide an overview of the recent advances in relating the structural features of PDI to its multiple catalytic roles as well as its physiological and pathophysiological functions related to redox regulation and protein folding.
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Affiliation(s)
- Hyder Ali Khan
- Chemistry and Biochemistry Department, University of Windsor Windsor, ON, Canada
| | - Bulent Mutus
- Chemistry and Biochemistry Department, University of Windsor Windsor, ON, Canada
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Eble JA, de Rezende FF. Redox-relevant aspects of the extracellular matrix and its cellular contacts via integrins. Antioxid Redox Signal 2014; 20:1977-93. [PMID: 24040997 PMCID: PMC3993061 DOI: 10.1089/ars.2013.5294] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 08/29/2013] [Accepted: 09/16/2013] [Indexed: 12/30/2022]
Abstract
SIGNIFICANCE The extracellular matrix (ECM) fulfills essential functions in multicellular organisms. It provides the mechanical scaffold and environmental cues to cells. Upon cell attachment, the ECM signals into the cells. In this process, reactive oxygen species (ROS) are physiologically used as signalizing molecules. RECENT ADVANCES ECM attachment influences the ROS-production of cells. In turn, ROS affect the production, assembly and turnover of the ECM during wound healing and matrix remodeling. Pathological changes of ROS levels lead to excess ECM production and increased tissue contraction in fibrotic disorders and desmoplastic tumors. Integrins are cell adhesion molecules which mediate cell adhesion and force transmission between cells and the ECM. They have been identified as a target of redox-regulation by ROS. Cysteine-based redox-modifications, together with structural data, highlighted particular regions within integrin heterodimers that may be subject to redox-dependent conformational changes along with an alteration of integrin binding activity. CRITICAL ISSUES In a molecular model, a long-range disulfide-bridge within the integrin β-subunit and disulfide bridges within the genu and calf-2 domains of the integrin α-subunit may control the transition between the bent/inactive and upright/active conformation of the integrin ectodomain. These thiol-based intramolecular cross-linkages occur in the stalk domain of both integrin subunits, whereas the ligand-binding integrin headpiece is apparently unaffected by redox-regulation. FUTURE DIRECTIONS Redox-regulation of the integrin activation state may explain the effect of ROS in physiological processes. A deeper understanding of the underlying mechanism may open new prospects for the treatment of fibrotic disorders.
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Affiliation(s)
- Johannes A. Eble
- Institute for Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
- Excellence Cluster Cardio-Pulmonary System, Center for Molecular Medicine, Vascular Matrix Biology, Frankfurt University Hospital, Frankfurt/Main, Germany
| | - Flávia Figueiredo de Rezende
- Institute for Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
- Excellence Cluster Cardio-Pulmonary System, Center for Molecular Medicine, Vascular Matrix Biology, Frankfurt University Hospital, Frankfurt/Main, Germany
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Griffiths HR, Dias IHK, Willetts RS, Devitt A. Redox regulation of protein damage in plasma. Redox Biol 2014; 2:430-5. [PMID: 24624332 PMCID: PMC3949090 DOI: 10.1016/j.redox.2014.01.010] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 01/11/2014] [Indexed: 01/12/2023] Open
Abstract
The presence and concentrations of modified proteins circulating in plasma depend on rates of protein synthesis, modification and clearance. In early studies, the proteins most frequently analysed for damage were those which were more abundant in plasma (e.g. albumin and immunoglobulins) which exist at up to 10 orders of magnitude higher concentrations than other plasma proteins e.g. cytokines. However, advances in analytical techniques using mass spectrometry and immuno-affinity purification methods, have facilitated analysis of less abundant, modified proteins and the nature of modifications at specific sites is now being characterised. The damaging reactive species that cause protein modifications in plasma principally arise from reactive oxygen species (ROS) produced by NADPH oxidases (NOX), nitric oxide synthases (NOS) and oxygenase activities; reactive nitrogen species (RNS) from myeloperoxidase (MPO) and NOS activities; and hypochlorous acid from MPO. Secondary damage to proteins may be caused by oxidized lipids and glucose autooxidation. In this review, we focus on redox regulatory control of those enzymes and processes which control protein maturation during synthesis, produce reactive species, repair and remove damaged plasma proteins. We have highlighted the potential for alterations in the extracellular redox compartment to regulate intracellular redox state and, conversely, for intracellular oxidative stress to alter the cellular secretome and composition of extracellular vesicles. Through secreted, redox-active regulatory molecules, changes in redox state may be transmitted to distant sites. Loss of redox homeostasis may affect the secretome content and protein concentration, transmitting redox signals to distant cells through extracellular vesicles. Damaged glycoforms may arise from oxidants or aberrant biosynthetic regulation. Reactive species generation by NOX and NOS is controlled through redox regulation. Cell surface and plasma thiol-oxidised proteins can be reduced and their activity modulated by thioredoxin, protein disulphide isomerase and reductases.
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Key Words
- Ageing
- BH4, tetrahydrobiopterin
- COX, cyclo-oxygenase
- CRP, C-reactive protein
- ER, endoplasmic reticulum
- ERO1, endoplasmic reticulum oxidoreductin 1
- EV, extracellular vesicles
- FX1, factor XI
- GPI, glycoprotein 1
- GPX, glutathione peroxidase
- GRX, glutaredoxin
- GSH, glutathione
- Glycosylation
- MIRNA, microRNA
- MPO, myeloperoxidase
- NO, nitric oxide
- NOS, nitric oxide synthase
- NOX, NADPH oxidase
- Nitration
- O2•−, superoxide anion radical
- ONOO-, peroxynitrite
- Oxidation
- PDI, protein disulphide isomerase
- Peroxiredoxin
- Prx, peroxiredoxin
- RNS, reactive nitrogen species
- ROS, reactive nitrogen species
- Thioredoxin
- Trx, thioredoxin
- VWF, von Willebrand factor
- XO, xanthine oxidase
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Affiliation(s)
- Helen R Griffiths
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Irundika H K Dias
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Rachel S Willetts
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Andrew Devitt
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
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