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Yadav P, Beura SK, Panigrahi AR, Kulkarni PP, Yadav MK, Munshi A, Singh SK. Lysophosphatidylcholine induces oxidative stress and calcium-mediated cell death in human blood platelets. Cell Biol Int 2024. [PMID: 38837523 DOI: 10.1002/cbin.12192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 05/06/2024] [Accepted: 05/11/2024] [Indexed: 06/07/2024]
Abstract
Platelets are essential component of circulation that plays a major role in hemostasis and thrombosis. During activation and its demise, platelets release platelet-derived microvesicles, with lysophosphatidylcholine (LPC) being a prominent component in their lipid composition. LPC, an oxidized low-density lipoprotein, is involved in cellular metabolism, but its higher level is implicated in pathologies like atherosclerosis, diabetes, and inflammatory disorders. Despite this, its impact on platelet function remains relatively unexplored. To address this, we studied LPC's effects on washed human platelets. A multimode plate reader was employed to measure reactive oxygen species and intracellular calcium using H2DCF-DA and Fluo-4-AM, respectively. Flow cytometry was utilized to measure phosphatidylserine expression, mitochondrial membrane potential (ΔΨm), and mitochondrial permeability transition pore (mPTP) formation using FITC-Annexin V, JC-1, and CoCl2/calcein-AM, respectively. Additionally, platelet morphology and its ultrastructure were observed via phase contrast and electron microscopy. Sonoclot and light transmission aggregometry were employed to examine fibrin formation and platelet aggregation, respectively. The findings demonstrate that LPC induced oxidative stress and increased intracellular calcium in platelets, resulting in increased phosphatidylserine expression and reduced ΔΨm. LPC triggered caspase-independent platelet death and mPTP opening via cytosolic and mitochondrial calcium, along with microvesiculation and reduced platelet counts. LPC increased the platelet's size, adopting a balloon-shaped morphology, causing membrane fragmentation and releasing its cellular contents, while inducing a pro-coagulant phenotype with increased fibrin formation and reduced integrin αIIbβ3 activation. Conclusively, this study reveals LPC-induced oxidative stress and calcium-mediated platelet death, necrotic in nature with pro-coagulant properties, potentially impacting inflammation and repair mechanisms during vascular injury.
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Affiliation(s)
- Pooja Yadav
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Samir K Beura
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Abhishek R Panigrahi
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Paresh P Kulkarni
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Mithlesh K Yadav
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
| | - Anjana Munshi
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Ghudda, Bathinda, India
| | - Sunil K Singh
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
- Department of Biochemistry, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, India
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2
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Li S, Gong L, Chen J, Wu X, Liu X, Fu H, Shou Q. Fabricating the multibranch carboxyl-modified cellulose for hemorrhage control. Mater Today Bio 2024; 24:100878. [PMID: 38188645 PMCID: PMC10767497 DOI: 10.1016/j.mtbio.2023.100878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/16/2023] [Accepted: 11/20/2023] [Indexed: 01/09/2024] Open
Abstract
Excessive bleeding is associated with a high mortality risk. In this study, citric acid and ascorbic acid were sequentially modified on the surface of microcrystalline cellulose (MCAA) to increase its carboxyl content, and their potential as hemostatic materials was investigated. The MCAA exhibited a carboxylic group content of 9.52 %, higher than that of citric acid grafted microcrystalline cellulose (MCA) at 4.6 %. Carboxyl functionalization of microcrystalline cellulose surfaces not only plays a fundamental role in the structure of composite materials but also aids in the absorption of plasma and stimulation of platelets. Fourier -transform infrared (FT-IR), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) spectra confirmed that carboxyl groups were successfully introduced onto the cellulose surface. Physical properties tests indicated that the MCAA possessed higher thermal stability (Tmax = 472.2 °C) compared to microcrystalline cellulose (MCC). Additionally, in vitro hemocompatibility, cytotoxicity and hemostatic property results demonstrated that MCAA displayed good biocompatibility (hemolysis ratio <1 %), optimal cell compatibility (cell viability exceeded 100 % after 72 h incubation), and impressive hemostatic effect (BCIMCAA = 31.3 %). Based on these findings, the hemostatic effect of covering a wound with MCAA was assessed, revealing enhanced hemostatic properties using MCAA in tail-amputation and liver-injury hemorrhage models. Furthermore, exploration into hemostatic mechanisms revealed that MCAA can significantly accelerate coagulation through rapid platelet aggregation and activation of the clotting cascade. Notably, MCAA showed remarkable biocompatibility and induced minimal skin irritation. In conclusion, the results affirmed that MCAA is a safe and potentially effective hemostatic agent for hemorrhage control.
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Affiliation(s)
- Shengyu Li
- The Second Affiliated Hospital & Second Clinical Medical School, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Lihong Gong
- Third Clinical Medical School of Zhejiang Chinese Medical University, Hangzhou, 310000, China
| | - Jianglin Chen
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 311402, China
| | - Xijin Wu
- The Second Affiliated Hospital & Second Clinical Medical School, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xia Liu
- The Second Affiliated Hospital & Second Clinical Medical School, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Huiying Fu
- The Second Affiliated Hospital & Second Clinical Medical School, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Qiyang Shou
- The Second Affiliated Hospital & Second Clinical Medical School, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Jinghua Academy, Zhejiang Chinese Medicine University, Jinghua, 321000, China
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3
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Yadav P, Panigrahi AR, Beura SK, Singh SK. Platelet-derived microvesicles induce intracellular calcium mobilization in human platelets. Cell Biol Int 2023; 47:1964-1975. [PMID: 37650361 DOI: 10.1002/cbin.12084] [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: 03/24/2023] [Revised: 07/15/2023] [Accepted: 08/16/2023] [Indexed: 09/01/2023]
Abstract
Platelet-derived microvesicles (PMVs) represent a significant proportion of microvesicles in circulation and have been linked to various pathophysiological complications. Recent research suggests that PMVs carry significant amounts of cargo that can affect cellular functions by influencing calcium oscillations in target cells. As calcium is involved in multiple cellular processes, including hemostasis and thrombosis, this study aimed to investigate the impact of PMVs on platelet calcium mobilization. The study found that PMVs increase platelet intracellular calcium levels via both intracellular storage and extracellular space in a dose-dependent manner. The study highlighted the critical role of the dense tubular system, acidic vacuoles, mitochondrial stores, and store-operated calcium entry (SOCE) in PMV-mediated calcium release in human platelets. Moreover, the study revealed that PMV-induced calcium rise in platelets does not occur via sarcoendoplasmic reticulum calcium ATPase, and extracellular calcium addition further increases the calcium level in platelets, demonstrating the involvement of SOCE. These findings provide insights into the platelet stimulation signaling mechanisms and contributes to our understanding of platelet and cell behavior when exposed to PMV-rich environments.
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Affiliation(s)
- Pooja Yadav
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
| | - Abhishek R Panigrahi
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
| | - Samir K Beura
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
| | - Sunil K Singh
- Department of Zoology, School of Biological Sciences, Central University of Punjab, Bathinda, India
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4
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Maharana S, Roy CL, Kishor K, Ranjan R, Ahmad F, Mahapatra M, Saxena R, Kannan M. Depolarized Mitochondrial Membrane Potential and Elevated Calcium in Platelets of Sickle Cell Disease. Indian J Hematol Blood Transfus 2023; 39:565-571. [PMID: 37786815 PMCID: PMC10542052 DOI: 10.1007/s12288-023-01640-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 02/23/2023] [Indexed: 03/06/2023] Open
Abstract
Hemolysis, a crucial feature of Sickle cell disease (SCD), is a key player for cellular activation leading to various complications including thrombosis. In response to hemolysis, platelets get activated and release components that are necessary for further platelet activation and aggregation. Thus, it is believed that platelets contribute to the development of thrombotic complications. Platelets in SCD are expected to be affected due to common cause of hemolysis. To measure the surface markers of platelets including P-Selectin, Phosphatidyl Serine and integrin αIIbβ3 in SCD patients and healthy controls in order to understand the status of the platelets in SCD. To measure the surface markers of activated platelets using flow cytometry. Since mitochondria and calcium play an important role in cellular functions, the mitochondrial membrane potential and calcium content of platelets in SCD were also evaluated using flow cytometry. In the present study, we have observed significant increase of calcium level in SCD platelets. Further, the loss of mitochondrial membrane potential in SCD platelets was found to be significantly higher when compared to platelets of healthy controls. Though the surface markers of activated platelets in SCD remain unchanged, increased level of calcium and mitochondrial membrane potential loss suggest that the platelets in SCD are more prone to become activated. In order to understand the status of the platelets in SCD, apart from the surface markers, it is also important to assess the calcium levels and mitochondrial membrane potential of platelets.
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Affiliation(s)
- Samarjit Maharana
- Division of Blood and Vascular Biology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Tiruvarur, 610 101 India
| | - Chitrali Laha Roy
- Division of Blood and Vascular Biology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Tiruvarur, 610 101 India
| | - Kamal Kishor
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
| | - Ravi Ranjan
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
| | - Firdos Ahmad
- Department of Basic Medical Sciences, College of Medicine, University of Sharjah, Sharjah, UAE
| | - Manoranjan Mahapatra
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
| | - Renu Saxena
- Department of Hematology, All India Institute of Medical Sciences, New Delhi, India
| | - Meganathan Kannan
- Division of Blood and Vascular Biology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Tiruvarur, 610 101 India
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5
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Manke MC, Roslan A, Walker B, Münzer P, Kollotzek F, Peng B, Mencl S, Coman C, Szepanowski RD, Schulze H, Lieberman AP, Lang F, Gawaz M, Kleinschnitz C, Lukowski R, Ahrends R, Bobe R, Borst O. Niemann-Pick C1 protein regulates platelet membrane-associated calcium ion signaling in thrombo-occlusive diseases in mice. J Thromb Haemost 2023; 21:1957-1966. [PMID: 37054918 DOI: 10.1016/j.jtha.2023.03.038] [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: 01/03/2023] [Revised: 03/14/2023] [Accepted: 03/28/2023] [Indexed: 04/15/2023]
Abstract
BACKGROUND Pathophysiologic platelet activation leads to thrombo-occlusive diseases such as myocardial infarction or ischemic stroke. Niemann-Pick C1 protein (NPC1) is involved in the regulation of lysosomal lipid trafficking and calcium ion (Ca2+) signaling, and its genetic mutation causes a lysosomal storage disorder. Lipids and Ca2+ are key players in the complex orchestration of platelet activation. OBJECTIVES The present study aimed to determine the impact of NPC1 on Ca2+ mobilization during platelet activation in thrombo-occlusive diseases. METHODS Using MK/platelet-specific knockout mice of Npc1 (Npc1Pf4∆/Pf4∆), ex vivo and in vitro approaches as well as in vivo models of thrombosis, we investigated the effect of Npc1 on platelet function and thrombus formation. RESULTS We showed that Npc1Pf4∆/Pf4∆ platelets display increased sphingosine levels and a locally impaired membrane-associated and SERCA3-dependent Ca2+ mobilisation compared to platelets from wildtype littermates (Npc1lox/lox). Further, we observed decreased platelet. CONCLUSION Our findings highlight that NPC1 regulates membrane-associated and SERCA3-dependent Ca2+ mobilization during platelet activation and that MK/platelet-specific ablation of Npc1 protects against experimental models of arterial thrombosis and myocardial or cerebral ischemia/reperfusion injury.
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Affiliation(s)
- Mailin-Christin Manke
- DFG Heisenberg Group Thrombocardiology; Department of Cardiology, Angiology and Cardiovascular Medicine, University of Tübingen, Germany
| | - Anna Roslan
- Department of Pharmacology, Toxicology and Clinical Pharmacy, University of Tübingen, Germany
| | | | - Patrick Münzer
- DFG Heisenberg Group Thrombocardiology; Department of Cardiology, Angiology and Cardiovascular Medicine, University of Tübingen, Germany
| | - Ferdinand Kollotzek
- DFG Heisenberg Group Thrombocardiology; Department of Cardiology, Angiology and Cardiovascular Medicine, University of Tübingen, Germany
| | - Bing Peng
- Leibniz-Institut für Analytische Wissenschaften-ISAS, Dortmund, Germany; Division of Rheumatology, Department of Medicine Solna, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Stine Mencl
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Cristina Coman
- Department of Analytical Chemistry, University of Vienna, Austria
| | - Rebecca D Szepanowski
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Harald Schulze
- Institute of Experimental Biomedicine, University Hospital Würzburg, Germany
| | | | - Florian Lang
- Department of Physiology, University of Tübingen, Germany
| | | | - Christoph Kleinschnitz
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Robert Lukowski
- Department of Pharmacology, Toxicology and Clinical Pharmacy, University of Tübingen, Germany
| | - Robert Ahrends
- Leibniz-Institut für Analytische Wissenschaften-ISAS, Dortmund, Germany; Department of Analytical Chemistry, University of Vienna, Austria
| | - Régis Bobe
- HITh, UMR_S1176, INSERM, Université Paris-Saclay, France
| | - Oliver Borst
- DFG Heisenberg Group Thrombocardiology; Department of Cardiology, Angiology and Cardiovascular Medicine, University of Tübingen, Germany.
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Veuthey L, Aliotta A, Bertaggia Calderara D, Pereira Portela C, Alberio L. Mechanisms Underlying Dichotomous Procoagulant COAT Platelet Generation-A Conceptual Review Summarizing Current Knowledge. Int J Mol Sci 2022; 23:ijms23052536. [PMID: 35269679 PMCID: PMC8910683 DOI: 10.3390/ijms23052536] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/19/2022] [Accepted: 02/21/2022] [Indexed: 12/23/2022] Open
Abstract
Procoagulant platelets are a subtype of activated platelets that sustains thrombin generation in order to consolidate the clot and stop bleeding. This aspect of platelet activation is gaining more and more recognition and interest. In fact, next to aggregating platelets, procoagulant platelets are key regulators of thrombus formation. Imbalance of both subpopulations can lead to undesired thrombotic or bleeding events. COAT platelets derive from a common pro-aggregatory phenotype in cells capable of accumulating enough cytosolic calcium to trigger specific pathways that mediate the loss of their aggregating properties and the development of new adhesive and procoagulant characteristics. Complex cascades of signaling events are involved and this may explain why an inter-individual variability exists in procoagulant potential. Nowadays, we know the key agonists and mediators underlying the generation of a procoagulant platelet response. However, we still lack insight into the actual mechanisms controlling this dichotomous pattern (i.e., procoagulant versus aggregating phenotype). In this review, we describe the phenotypic characteristics of procoagulant COAT platelets, we detail the current knowledge on the mechanisms of the procoagulant response, and discuss possible drivers of this dichotomous diversification, in particular addressing the impact of the platelet environment during in vivo thrombus formation.
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7
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Platelet Membrane: An Outstanding Factor in Cancer Metastasis. MEMBRANES 2022; 12:membranes12020182. [PMID: 35207103 PMCID: PMC8875259 DOI: 10.3390/membranes12020182] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/27/2022] [Accepted: 01/31/2022] [Indexed: 12/02/2022]
Abstract
In addition to being biological barriers where the internalization or release of biomolecules is decided, cell membranes are contact structures between the interior and exterior of the cell. Here, the processes of cell signaling mediated by receptors, ions, hormones, cytokines, enzymes, growth factors, extracellular matrix (ECM), and vesicles begin. They triggering several responses from the cell membrane that include rearranging its components according to the immediate needs of the cell, for example, in the membrane of platelets, the formation of filopodia and lamellipodia as a tissue repair response. In cancer, the cancer cells must adapt to the new tumor microenvironment (TME) and acquire capacities in the cell membrane to transform their shape, such as in the case of epithelial−mesenchymal transition (EMT) in the metastatic process. The cancer cells must also attract allies in this challenging process, such as platelets, fibroblasts associated with cancer (CAF), stromal cells, adipocytes, and the extracellular matrix itself, which limits tumor growth. The platelets are enucleated cells with fairly interesting growth factors, proangiogenic factors, cytokines, mRNA, and proteins, which support the development of a tumor microenvironment and support the metastatic process. This review will discuss the different actions that platelet membranes and cancer cell membranes carry out during their relationship in the tumor microenvironment and metastasis.
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8
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Gong M, Liu C, Liu C, Wang L, Shafiq F, Liu X, Sun G, Song Q, Qiao W. Biomimetic hydroxyapate/polydopamine composites with good biocompatibility and efficiency for uncontrolled bleeding. J Biomed Mater Res B Appl Biomater 2021; 109:1876-1892. [PMID: 33847453 DOI: 10.1002/jbm.b.34849] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/08/2021] [Accepted: 03/28/2021] [Indexed: 11/11/2022]
Abstract
Uncontrolled bleeding is thought to be the most deadly cause of pre-hospital, traffic, and military accidents death. However, the popular commercial hemostats can only realize the hemostasis of mild bleeding. Therefore, we developed polydopamine (PDA) composite materials (PMs), which applied hydroxyapatite as the parent body. The PMs were produced via lyophilization and functionalized with amino, phenol hydroxyls groups, which endowed hydrophobicity to materials. This ensured a high aggregation ability of blood cells to the PMs and they were tested to be as high as 300% compared with the negative control group. The clotting time was shortened to 79.7% compared with the usually used commercial hemostat (Celox) in the test of in vitro hemostasis. Through the results of PT and APTT tests, blood coagulation index test, and the analysis of intracellular Ca2+ activation, we further understood the mechanism of the hemostasis of the materials, which explained the low blood loss and quick coagulation time of the PM hemostats in detail. Besides, the low hemolysis and cytotoxicity of the PMs suggested the good biocompatibility of the hemostats, which was further proved by the regular morphology maintained by erythrocytes in the hemolysis tests. The study of nanoscale composites led the research for the methods of hemostasis.
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Affiliation(s)
- Mengxiang Gong
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
| | - Chenyu Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
| | - Chunyu Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
| | - Lingyi Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
| | - Farishta Shafiq
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
| | - Xia Liu
- The First Affiliated Hospital of Dalian Medical University, Dalian Medical University, Dalian, P.R. China
| | - Guozhen Sun
- The First Affiliated Hospital of Dalian Medical University, Dalian Medical University, Dalian, P.R. China
| | - Qiling Song
- School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, P.R. China
| | - Weihong Qiao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
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9
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Wang Y, Zhao Y, Qiao L, Zou F, Xie Y, Zheng Y, Chao Y, Yang Y, He W, Yang S. Cellulose fibers-reinforced self-expanding porous composite with multiple hemostatic efficacy and shape adaptability for uncontrollable massive hemorrhage treatment. Bioact Mater 2021; 6:2089-2104. [PMID: 33511309 PMCID: PMC7807144 DOI: 10.1016/j.bioactmat.2020.12.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/30/2020] [Accepted: 12/17/2020] [Indexed: 01/06/2023] Open
Abstract
Uncontrollable hemorrhage leads to high mortality and thus effective bleeding control becomes increasingly important in the military field and civilian trauma arena. However, current hemostats not only present limitation when treating major bleeding, but also have various side effects. Here we report a self-expanding porous composites (CMCP) based on novel carboxymethyl cellulose (CMC) fibers and acetalized polyvinyl alcohol (PVA) for lethal hemorrhage control. The CMC fibers with uniform fibrous structure, high liquid absorption and procoagulant ability, are evenly interspersed inside the composite matrix. The obtained composites possess unique fiber-porous network, excellent absorption capacity, fast liquid-triggered self-expanding ability and robust fatigue resistance, and their physicochemical performance can be fine-tuned through varying the CMC content. In vitro tests show that the porous composite exhibits strong blood clotting ability, high adhesion to blood cells and protein, and the ability to activate platelet and the coagulation system. In vivo hemostatic evaluation further confirms that the CMCP presents high hemostatic efficacy and multiple hemostatic effects in swine femoral artery major hemorrhage model. Additionally, the CMCP will not fall off from the injury site, and is also easy to surgically remove from the wound cavity after the hemostasis. Importantly, results of CT tomography and 3D reconstruction indicate that CMCP can achieve shape adaptation to the surrounding tissues and the wound cavities with different depths and shapes, to accelerate hemostasis while protecting wound tissue and preventing infection.
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Affiliation(s)
- Yansen Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China
| | - Yifan Zhao
- Department of Anesthesiology, Medical College of Chinese PLA, Beijing, 100853, PR China
| | - Longxue Qiao
- Department of Medical Engineering, The First Affiliated Hospital of the PLA General Hospital, Beijing, 100048, PR China
| | - Faxing Zou
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China
| | - Yajie Xie
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China
| | - Yudong Zheng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China
| | - Yong Chao
- Department of Medical Engineering, The First Affiliated Hospital of the PLA General Hospital, Beijing, 100048, PR China
| | - Ying Yang
- First Affiliated Hospital of Medical College, Zhejiang University, Hangzhou, 310003, PR China
| | - Wei He
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China
| | - Siming Yang
- Key Laboratory of Wound Repair and Regeneration of PLA, Chinese PLA General Hospital, Medical College of PLA, Beijing, 100853, PR China
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10
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Cui Q, Zhao Z, Gao T, Yuan C. Effects of Glycosaminoglycan from Urechis unicinctus on ADP-Induced Platelet Calcium and Membrane Glycoprotein Expressions in Rats. Acta Haematol 2020; 144:44-47. [PMID: 32653886 DOI: 10.1159/000505769] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/07/2020] [Indexed: 01/20/2023]
Abstract
BACKGROUND Previous studies had shown that glycosaminoglycan (GAG) from Urechis unicinctus exerts an obvious antiplatelet aggregation effect. OBJECTIVE This study aims to investigate the effects of GAG from Urechis unicinctus on ADP-induced platelet calcium and membrane glycoprotein expressions in rats. METHODS Fura-2/AM fluorescence probe was used to measure intracytosolic free-calcium concentration ([Ca2+]i) of platelets and calculate platelet calcium influx and release concentrations. Flow cytometry was used to detect the expressions of platelet membrane glycoproteins GPIIb/IIIa (PAC-1) and P-selectin (CD62P) in rats. RESULTS The results showed that the GAG from U. unicinctus significantly inhibited the release of platelet calcium (p < 0.01) and the expressions of platelet GPII b/IIIa and P-selectin (p < 0.01) induced by ADP in rats but had no significant effect on the influx of platelet calcium (p > 0.01). CONCLUSIONS This study indicated that GAG may inhibit platelet activation and aggregation by reducing the release of Ca2+ and ADP-induced expression of platelet membrane glycoprotein in rats.
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Affiliation(s)
- Qingman Cui
- Tianjin Key Laboratory of Marine Resource and Chemistry, Tianjin Marine Environmental Protection and Restoration Technology Engineering Center, College of Marine and Environment, Tianjin University of Science and Technology, Tianjin, China,
| | - Ziyue Zhao
- Tianjin Key Laboratory of Marine Resource and Chemistry, Tianjin Marine Environmental Protection and Restoration Technology Engineering Center, College of Marine and Environment, Tianjin University of Science and Technology, Tianjin, China
| | - Tong Gao
- Tianjin Key Laboratory of Marine Resource and Chemistry, Tianjin Marine Environmental Protection and Restoration Technology Engineering Center, College of Marine and Environment, Tianjin University of Science and Technology, Tianjin, China
| | - Chunying Yuan
- Tianjin Key Laboratory of Marine Resource and Chemistry, Tianjin Marine Environmental Protection and Restoration Technology Engineering Center, College of Marine and Environment, Tianjin University of Science and Technology, Tianjin, China
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11
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Wei H, Davies JE, Harper MT. 2-Aminoethoxydiphenylborate (2-APB) inhibits release of phosphatidylserine-exposing extracellular vesicles from platelets. Cell Death Discov 2020; 6:10. [PMID: 32140260 PMCID: PMC7051957 DOI: 10.1038/s41420-020-0244-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/03/2019] [Accepted: 12/10/2019] [Indexed: 12/17/2022] Open
Abstract
Activated, procoagulant platelets shed phosphatidylserine (PS)-exposing extracellular vesicles (EVs) from their surface in a Ca2+- and calpain-dependent manner. These PS-exposing EVs are prothrombotic and proinflammatory and are found at elevated levels in many cardiovascular and metabolic diseases. How PS-exposing EVs are shed is not fully understood. A clearer understanding of this process may aid the development of drugs to selectively block their release. In this study we report that 2-aminoethoxydiphenylborate (2-APB) significantly inhibits the release of PS-exposing EVs from platelets stimulated with the Ca2+ ionophore, A23187, or the pore-forming toxin, streptolysin-O. Two analogues of 2-APB, diphenylboronic anhydride (DPBA) and 3-(diphenylphosphino)-1-propylamine (DP3A), inhibited PS-exposing EV release with similar potency. Although 2-APB and DPBA weakly inhibited platelet PS exposure and calpain activity, this was not seen with DP3A despite inhibiting PS-exposing EV release. These data suggest that there is a further target of 2-APB, independent of cytosolic Ca2+ signalling, PS exposure and calpain activity, that is required for PS-exposing EV release. DP3A is likely to inhibit the same target, without these other effects. Identifying the target of 2-APB, DPBA and DP3A may provide a new way to inhibit PS-exposing EV release from activated platelets and inhibit their contribution to thrombosis and inflammation.
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Affiliation(s)
- Hao Wei
- Department of Pharmacology, University of Cambridge, Cambridge, UK
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12
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Guo X, Zhang J, Zhu J, Chen QH, Wang R, Gui L. Enhanced store-operated calcium entry in platelets is associated with acute coronary syndrome. Acta Biochim Biophys Sin (Shanghai) 2020; 52:207-210. [PMID: 31942931 DOI: 10.1093/abbs/gmz147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 11/17/2019] [Accepted: 11/19/2019] [Indexed: 11/15/2022] Open
Affiliation(s)
- Xin Guo
- Department of Urology, Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Jiayu Zhang
- Department of Cardiology, Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Jianhua Zhu
- Department of Cardiology, Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Qing-Hui Chen
- Department of Kinesiology and Integrative Physiology, Michigan Technological University, Houghton, MI 49931, USA
| | - Renjun Wang
- Departments of Biotechnology, School of Life Science, Jilin Normal University, Siping 136000, China
| | - Le Gui
- Department of Cardiology, Affiliated Hospital of Nantong University, Nantong 226000, China
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13
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Abstract
Of the established Ca2+-mobilizing messengers, NAADP is arguably the most tantalizing. It is the most potent, often efficacious at low nanomolar concentrations, and its receptors undergo dramatic desensitization. Recent studies have identified a new class of calcium-release channel, the two-pore channels (TPCs), as the likely targets for NAADP regulation, even though the effect may be indirect. These channels localized at endolysosomes, where they mediate local Ca2+ release, and have highlighted a new role of acidic organelles as targets for messenger-evoked Ca2+ mobilization. Three distinct roles of TPCs have been identified. The first is to effect local Ca2+ release that may play a role in endolysosomal function including vesicular fusion and trafficking. The second is to trigger global calcium release by recruiting Ca2+-induced Ca2+-release (CICR) channels at lysosomal-endoplasmic reticulum (ER) junctions. The third is to regulate plasma membrane excitability by the targeting of Ca2+ release from appropriately positioned subplasma membrane stores to regulate plasma membrane Ca2+-activated channels. In this review, I discuss the role of nicotinic acid adenine nucleotide diphosphate (NAADP)-mediated Ca2+ release from endolysosomal stores as a widespread trigger for intracellular calcium signaling mechanisms, and how studies of TPCs are beginning to enhance our understanding of the central role of lysosomes in Ca2+ signaling.
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Affiliation(s)
- Antony Galione
- Department of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom
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Galione A, Chuang KT. Pyridine Nucleotide Metabolites and Calcium Release from Intracellular Stores. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1131:371-394. [PMID: 31646518 DOI: 10.1007/978-3-030-12457-1_15] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ca2+ signals are probably the most common intracellular signaling cellular events, controlling an extensive range of responses in virtually all cells. Many cellular stimuli, often acting at cell surface receptors, evoke Ca2+ signals by mobilizing Ca2+ from intracellular stores. Inositol trisphosphate (IP3) was the first messenger shown to link events at the plasma membrane to release Ca2+ from the endoplasmic reticulum (ER), through the activation of IP3-gated Ca2+ release channels (IP3 receptors). Subsequently, two additional Ca2+ mobilizing messengers were discovered, cADPR and NAADP. Both are metabolites of pyridine nucleotides, and may be produced by the same class of enzymes, ADP-ribosyl cyclases, such as CD38. Whilst cADPR mobilizes Ca2+ from the ER by activation of ryanodine receptors (RyRs), NAADP releases Ca2+ from acidic stores by a mechanism involving the activation of two pore channels (TPCs). In addition, other pyridine nucleotides have emerged as intracellular messengers. ADP-ribose and 2'-deoxy-ADPR both activate TRPM2 channels which are expressed at the plasma membrane and in lysosomes.
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Affiliation(s)
- Antony Galione
- Department of Pharmacology, University of Oxford, Oxford, UK.
| | - Kai-Ting Chuang
- Department of Pharmacology, University of Oxford, Oxford, UK
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15
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A highly efficient, in situ wet-adhesive dextran derivative sponge for rapid hemostasis. Biomaterials 2019; 205:23-37. [DOI: 10.1016/j.biomaterials.2019.03.016] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/06/2019] [Accepted: 03/13/2019] [Indexed: 01/15/2023]
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16
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Study on the Role of Calreticulin Within Platelet from Adult Patients with Chronic Immune Thrombocytopenic Purpura. Indian J Hematol Blood Transfus 2018; 34:711-718. [PMID: 30369746 DOI: 10.1007/s12288-018-0955-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 03/28/2018] [Indexed: 02/05/2023] Open
Abstract
To observe the differences in proteins between adult patients with chronic immune thrombocytopenic purpura (ITP) and healthy adults. 30 patients with chronic ITP and 30 healthy controls were enrolled into the study. The platelet total protein was extracted from peripheral venous blood of 10 chronic ITP patients and 10 healthy controls respectively, and subjected to two-dimensional electrophoresis (2-DE) to find the differential protein spot between chronic ITP patients and healthy controls, then the differential protein spots were identified by mass spectrometry. Subsequently, platelets RNA and proteins were isolated from the other 20 chronic ITP patients and 20 healthy controls respectively, and used for confirming the 2-DE and mass spectrometry results by using reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and enzyme linked immunosorbent assay (ELISA). 2-DE combined with mass spectrometry revealed that calreticulin (CRT) expressed normally within platelets from healthy controls, while it reduced within platelets from patients with chronic ITP. qPCR and ELISA confirmed that CRT was decreased at both RNA transcription and protein expression levels within platelets from chronic ITP patients compared with healthy controls. Decreased transcription and expression of CRT within platelets may play an important role in the pathogenesis of chronic ITP, which is worthy of further study.
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17
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Fluorescence-Based Measurements of the CRAC Channel Activity in Cell Populations. Methods Mol Biol 2018. [PMID: 30203278 DOI: 10.1007/978-1-4939-8704-7_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Cytosolic Ca2+ plays an important role in cellular biology, and since its identification as a second messenger, a number of techniques and methods to analyze the changes in cytosolic Ca2+ concentration ([Ca2+]c) induced by physiological agonists have been developed. Changes in [Ca2+]c might be determined in single cells or in cell populations. Measurement in single cells allows to determine changes in [Ca2+]c at a subcellular level but often results in heterogeneous responses among cells. Determination of intracellular Ca2+ mobilization at the cell population level reduces this heterogeneity and allows [Ca2+]c measurements in small cells that load little amounts of indicator. Here, we describe the measurement of agonist-evoked changes in [Ca2+]c associated with Ca2+ influx in cell populations.
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18
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Wang X, Guan J, Zhuang X, Li Z, Huang S, Yang J, Liu C, Li F, Tian F, Wu J, Shu Z. Exploration of Blood Coagulation of N-Alkyl Chitosan Nanofiber Membrane in Vitro. Biomacromolecules 2018; 19:731-739. [PMID: 29309730 DOI: 10.1021/acs.biomac.7b01492] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N-Alkylated chitosan (NACS) may improve the blood clotting efficiency of chitosan (CS). To study its blood coagulation capability, a series of NACSs with various carbon chain lengths and degrees of substitution (DS) of alkyl groups were synthesized and characterized by FTIR, NMR, elemental analysis, and X-ray diffraction (XRD). The corresponding NACS nanofiber membranes (NACS-NM) were subsequently fabricated by electronic spinning technique. SEM, XRD, DSC, surface area, porosity, contact angle, blood absorption, and mechanical properties were used to characterize the CS-NM/NACS-NM. Moreover, cytotoxicity, coagulation, activated partial thromboplastin time, plasma prothrombin time, thrombin time, and platelet aggregation tests were performed to evaluate the biocompatibility and blood coagulation properties of NACS-NM. The results showed that NACS-NM was not cytotoxic. NACS-NM with DS of 19.25% for N-hexane CS (CS6b), 17.87% for N-dodecane CS (CS12b), and 8.97% for N-octadecane CS (CS18a) exhibited good blood clotting performance. Moreover, NACS-NMs favored the activation of coagulation factors and platelets. In addition, intracellular Ca2+ was not related to platelet activation. The above results suggested that NACS-NM would be an effective hemostatic agent.
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Affiliation(s)
- Xiaoyan Wang
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China.,Department of Textile , Tianjin Polytechnic University , No. 399 Binshui West Road , Xiqing District, Tianjin 300387 , China
| | - Jing Guan
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Xupin Zhuang
- Department of Textile , Tianjin Polytechnic University , No. 399 Binshui West Road , Xiqing District, Tianjin 300387 , China
| | - Zhihong Li
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Shujie Huang
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Jian Yang
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Changjun Liu
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Fan Li
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Feng Tian
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Jimin Wu
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Zhan Shu
- Key laboratory of Medical Equipment , Academy of Military Medical Sciences , No. 106 Wandong Road , Hedong District, Tianjin 300161 , China
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19
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Chen Z, Yao X, Liu L, Guan J, Liu M, Li Z, Yang J, Huang S, Wu J, Tian F, Jing M. Blood coagulation evaluation of N -alkylated chitosan. Carbohydr Polym 2017; 173:259-268. [DOI: 10.1016/j.carbpol.2017.05.085] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/27/2017] [Accepted: 05/25/2017] [Indexed: 10/19/2022]
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20
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Lin CS, Chen TH, Lin IH, Lee AR, Chou TC. The novel compound MP407 inhibits platelet aggregation through cyclic AMP-dependent processes. Eur J Pharmacol 2017; 815:324-331. [PMID: 28939294 DOI: 10.1016/j.ejphar.2017.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 09/15/2017] [Accepted: 09/15/2017] [Indexed: 11/27/2022]
Abstract
Platelet hyperactivity plays a critical role for initiating several vascular diseases such as atherothrombosis. Therefore, development of effective antiplatelet agents is necessary for ameliorating platelet-related diseases. In this study, we investigated the effects of the new synthesized compound, MP407 on platelet aggregation and further elucidated the underlying mechanisms. Our results demonstrated that MP407 dose-dependently inhibited collagen-induced platelet aggregation, thromboxane B2 (TXB2) production, intracellular Ca2+ mobilization, platelet membrane GPIIb/IIIa expression, and the phosphorylation of Akt, GSK3β, p38MAPK, and phospho (Ser) PKC substrate (p47). Moreover, MP407 is able to increase the cyclic AMP formation both in resting and activated platelets. However, blocking cyclic AMP formation with 2'5'-ddAdo, an inhibitor of adenylate cyclase, greatly reversed the antiplatelet activity of MP407 and related platelet-activating pathways. MP407 also enhanced VASP phosphorylation at Ser157 in collagen-stimulated platelets, which was attenuated by addition of 2'5'-ddAdo. Therefore, the antiplatelet activity of MP407 may be modulated by cyclic AMP-dependent regulation of Akt, GSK3β, p38MAPK and VASP phosphorylation. Notably, treatment with MP407 markedly reduced the pulmonary thrombosis and the numbers of paralysis and death in mice induced by ADP injection, but did not affect the bleeding time. Taken together, MP407 may be a potential candidate or lead compound for developing novel antiplatelet or antithrombotic agents for platelet hyperactivity-triggered disease therapy.
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Affiliation(s)
- Chung-Shuen Lin
- School of Post-Baccalaureate Chinese Medicine, Tzu Chi University, Hualien, Taiwan
| | - Tso-Hsiao Chen
- Division of Nephrology, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - I-Hsin Lin
- School of Post-Baccalaureate Chinese Medicine, Tzu Chi University, Hualien, Taiwan
| | - An-Rong Lee
- School of Pharmacy, National Defense Medical Center, Taipei, Taiwan
| | - Tz-Chong Chou
- Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan; Department of Biotechnology, Asia University, Taichung, Taiwan; China Medical University Hospital, China Medical University, Taichung, Taiwan.
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21
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Badran Z, Abdallah MN, Torres J, Tamimi F. Platelet concentrates for bone regeneration: Current evidence and future challenges. Platelets 2017. [DOI: 10.1080/09537104.2017.1327656] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zahi Badran
- Department of Periodontology (CHU/Rmes Inserm U1229/UIC11), Faculty of Dental Surgery, University of Nantes, Nantes, France
- Division of Biomedical Sciences, Faculty of Dentistry, McGill University, Montreal, QC, Canada
| | - Mohamed-Nur Abdallah
- Division of Biomedical Sciences, Faculty of Dentistry, McGill University, Montreal, QC, Canada
| | - Jesus Torres
- Faculty of Dentistry, Universidad Complutense, Madrid, Spain
| | - Faleh Tamimi
- Division of Biomedical Sciences, Faculty of Dentistry, McGill University, Montreal, QC, Canada
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22
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Skripchenko A, Turgeon A, Thompson-Montgomery D, Awatefe H, Wagner SJ. Value of calcium and phosphate in a bicarbonate-containing platelet additive solution with low plasma levels in maintaining key in vitro platelet storage parameters. Transfusion 2016; 57:349-356. [PMID: 27859382 DOI: 10.1111/trf.13894] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/12/2016] [Accepted: 09/13/2016] [Indexed: 12/16/2022]
Abstract
BACKGROUND Use of recently developed platelet (PLT) additive solutions (PAS) with 5% plasma levels may reduce the frequency and/or severity of transfusion reactions attributed to plasma. PLTs suspended in bicarbonate-containing PAS-5 with 5% plasma levels can maintain key PLT parameters during 7-day storage. This study evaluates the role of calcium and phosphate, as constituents of PAS-5, in maintaining PLT parameters. STUDY DESIGN AND METHODS An Amicus apheresis PLT unit (n = 13) was equally divided into four 60-mL aliquots in CF-250 polyolefin bags. Four different formulations of PAS-5 were prepared: PAS-5, PAS-5 without phosphate (-PO4 ), PAS-5 without calcium (-Ca), and PAS-5 without Ca and phosphate (-Ca/-PO4 ). PLTs were centrifuged, and the supernatant was expressed and replaced with the respective PAS, yielding PLTs suspended in 95% PAS and 5% plasma. PLTs were stored at 20 to 24ºC with agitation for 7 days. PLT in vitro parameters were evaluated on Days 1, 5, and 7. RESULTS In PLT PAS-5 aliquots, pH levels were maintained better compared with those in -Ca and -Ca/-PO4 aliquots. Glycolysis was greater in -Ca and -Ca/-PO4 PLT aliquots compared with PAS-5 aliquots. Hypotonic stress response and morphology were less and p-selectin (CD62P) binding was greater in -Ca/-PO4 PLT aliquots. The accumulation of reactive oxygen species was greater in -Ca/-PO4 PLTs. Phosphorylation of p38 mitogen-activated protein kinase (MAPK) was greater in -Ca and -Ca/-PO4 PLT aliquots during storage. CONCLUSION The removal of calcium and phosphate from PAS-5 leads to the activation of p38 MAPK and deterioration of key PLT storage parameters.
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Affiliation(s)
- Andrey Skripchenko
- American Red Cross Biomedical Services, Holland Laboratory, Rockville, Maryland
| | - Annette Turgeon
- American Red Cross Biomedical Services, Holland Laboratory, Rockville, Maryland
| | | | - Helen Awatefe
- American Red Cross Biomedical Services, Holland Laboratory, Rockville, Maryland
| | - Stephen J Wagner
- American Red Cross Biomedical Services, Holland Laboratory, Rockville, Maryland
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23
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Brailoiu GC, Brailoiu E. Modulation of Calcium Entry by the Endo-lysosomal System. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 898:423-47. [PMID: 27161239 DOI: 10.1007/978-3-319-26974-0_18] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Endo-lysosomes are acidic organelles that besides the role in macromolecules degradation, act as intracellular Ca(2+) stores. Nicotinic acid adenine dinucleotide phosphate (NAADP), the most potent Ca(2+)-mobilizing second messenger, produced in response to agonist stimulation, activates Ca(2+)-releasing channels on endo-lysosomes and modulates a variety of cellular functions. NAADP-evoked signals are amplified by Ca(2+) release from endoplasmic reticulum, via the recruitment of inositol 1,4,5-trisphosphate and/or ryanodine receptors through a Ca(2+)-induced Ca(2+)- release (CICR) mechanism. The endo-lysosomal Ca(2+) channels activated by NAADP were recently identified as the two-pore channels (TPCs). In addition to TPCs, endo-lysosomes express another distinct family of Ca(2+)- permeable channels, namely the transient receptor potential mucolipin (TRPML) channels, functionally distinct from TPCs. TPCs belong to the voltage-gated channels, resembling voltage-gated Na(+) and Ca(2+) channels. TPCs have important roles in vesicular fusion and trafficking, in triggering a global Ca(2+) signal and in modulation of the membrane excitability. Depletion of acidic Ca(2+) stores has been shown to activate store-operated Ca(2+) entry in human platelets and mouse pancreatic β-cells. In human platelets, Ca(2+) influx in response to acidic stores depletion is facilitated by the tubulin-cytoskeleton and occurs through non-selective cation channels and transient receptor potential canonical (TRPC) channels. Emerging evidence indicates that activation of intracellular receptors, situated on endo-lysosomes, elicits canonical and non-canonical signaling mechanisms that involve CICR and activation of non-selective cation channels in plasma membrane. The ability of endo-lysosomal Ca(2+) stores to modulate the Ca(2+) release from other organelles and the Ca(2+) entry increases the diversity and complexity of cellular signaling mechanisms.
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Affiliation(s)
- G Cristina Brailoiu
- Department of Pharmaceutical Sciences, Jefferson School of Pharmacy, Thomas Jefferson University, 901 Walnut St, Rm 916, Philadelphia, PA, 19107, USA.
| | - Eugen Brailoiu
- Center for Substance Abuse Research, Temple University School of Medicine, 3500 N. Broad Street, Room 848, Philadelphia, PA, 19140, USA
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24
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Banerjee M, Whiteheart SW. How Does Protein Disulfide Isomerase Get Into a Thrombus? Arterioscler Thromb Vasc Biol 2016; 36:1056-7. [PMID: 27225788 DOI: 10.1161/atvbaha.116.307625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Meenakshi Banerjee
- From the Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington
| | - Sidney W Whiteheart
- From the Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington.
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25
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Lopez E, Bermejo N, Berna-Erro A, Alonso N, Salido GM, Redondo PC, Rosado JA. Relationship between calcium mobilization and platelet α- and δ-granule secretion. A role for TRPC6 in thrombin-evoked δ-granule exocytosis. Arch Biochem Biophys 2015; 585:75-81. [PMID: 26386308 DOI: 10.1016/j.abb.2015.09.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 11/25/2022]
Abstract
Changes in cytosolic Ca(2+) concentration ([Ca(2+)]c) regulate granule secretion in different cell types. Thrombin activates PAR1 and PAR4 receptors and promotes release of Ca(2+) from distinct intracellular stores, which, in turn, activates store-operated Ca(2+) entry (SOCE). A crucial step during platelet function is the release of physiological agonists stored in secretory granules to the extracellular compartment during activation. We aim to study the role of Ca(2+) mobilization from the extracellular compartment or from different intracellular stores in platelet granule secretion. By using flow cytometry, we have found that α- and δ-granules are secreted in thrombin-stimulated platelets in the absence of extracellular Ca(2+), and in a concentration-dependent manner. Our findings show that thrombin-stimulated granule secretion depends on Ca(2+) mobilization from intracellular stores. Analysis of the kinetics of granule secretion reveals that platelet stimulation with thrombin results in rapid release of α-granules which precedes the secretion of δ-granules. Incubation of platelets with a specific antibody, which recognizes the extracellular amino acid sequence 573-586 of TRPC6, inhibited thrombin-evoked δ-granule exocytosis. Our results indicate that the mechanisms underlying thrombin-induced α- and δ-granule secretion show differences in dependency on Ca(2+) mobilization.
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Affiliation(s)
- E Lopez
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - N Bermejo
- Department of Hematology, Hospital San Pedro de Alcantara, 10003 Cáceres, Spain
| | - A Berna-Erro
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - N Alonso
- Department of Hematology, Hospital Infanta Cristina, 06006 Badajoz, Spain
| | - G M Salido
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - P C Redondo
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - J A Rosado
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain.
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26
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Gravemann U, Volgmann T, Min K, Philipp R, Lambrecht B, Müller TH, Seltsam A. In vitro variables of buffy coat-derived platelet concentrates with residual plasma of down to 10% are stably maintained in new-generation platelet additive solutions. Transfusion 2015; 55:1700-9. [DOI: 10.1111/trf.13000] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 12/04/2014] [Accepted: 12/04/2014] [Indexed: 02/01/2023]
Affiliation(s)
- Ute Gravemann
- German Red Cross Blood Service NSTOB, Institute Springe; Springe Germany
| | - Thorsten Volgmann
- German Red Cross Blood Service NSTOB, Institute Springe; Springe Germany
| | | | | | - Bernd Lambrecht
- German Red Cross Blood Service NSTOB, Institute Springe; Springe Germany
| | - Thomas H. Müller
- German Red Cross Blood Service NSTOB, Institute Springe; Springe Germany
| | - Axel Seltsam
- German Red Cross Blood Service NSTOB, Institute Springe; Springe Germany
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27
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Chou TC. New mechanisms of antiplatelet activity of nifedipine, an L-type calcium channel blocker. Biomedicine (Taipei) 2014; 4:24. [PMID: 25520937 PMCID: PMC4265014 DOI: 10.7603/s40681-014-0024-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 11/05/2014] [Indexed: 01/03/2023] Open
Abstract
Platelet hyperactivity often occursd in hypertensive patients and is a key factor in the development of cardiovascular diseases including thrombosis and atherosclerosis. Nifedipine, an L-type calcium channel blocker, is widely used for hypertension and coronary heart disease therapy. In addition, nifedipine is known to exhibit an antiplatelet activity, but the underlying mechanisms involved remain unclear. Several transcription factors such as peroxisome proliferator-activated receptors (PPARs) and nuclear factor kappa B (NF-κB) exist in platelets and have an ability to regulate platelet aggregation through a non-genomic mechanism. The present article focuses on describing the mechanisms of the antiplatelet activity of nifedipine via PPAR activation. It has been demonstrated that nifedipine treatment increases the activity and intracellular amount of PPAR-β/-γ in activated platelets. Moreover, the antiplatelet activity of nifedipine is mediated by PPAR-β/-γ-dependent upon the up-regulation of the PI3K/AKT/NO/cyclic GMP/PKG pathway, and inhibition of protein kinase Cα (PKCα) activity via an interaction between PPAR-β/-γ and PKCα. Furthermore, suppressing NF-κB activation by nifedipine through enhanced association of PPAR-β/-γ with NF-κB has also been observed in collagen-stimulated platelets. Blocking PPAR-β/-γ activity or increasing NF-κB activation greatly reverses the antiplatelet activity and inhibition of intracellular Ca2+ mobilization, PKCα activity, and surface glycoprotein IIb/IIIa expression caused by nifedipine. Thus, PPAR-β/-γ- dependent suppression of NF-κB activation also contributes to the antiplatelet activity of nifedipine. Consistently, administration of nifedipine markedly reduces fluorescein sodium-induced vessel thrombus formation in mice, which is considerably inhibited when the PPAR-β/-γ antagonists are administrated simultaneously. Collectively, these results provide important information regarding the mechanism by which nifedipine inhibits platelet aggregation and thrombus formation through activation of PPAR-β/-γ- mediated signaling pathways. These findings highlight that PPARs are novel therapeutic targets for preventing and treating platelet-hyperactivity-related vascular diseases.
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Affiliation(s)
- Tz-Chong Chou
- Institute of Medical Sciences, Tzu Chi University, 6F, Xie-Li Building, No. 707, Sec. 3, Zhongyang Rd.,, 970 Hualien, Taiwan
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28
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The first comprehensive and quantitative analysis of human platelet protein composition allows the comparative analysis of structural and functional pathways. Blood 2012; 120:e73-82. [PMID: 22869793 DOI: 10.1182/blood-2012-04-416594] [Citation(s) in RCA: 542] [Impact Index Per Article: 45.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Antiplatelet treatment is of fundamental importance in combatting functions/dysfunction of platelets in the pathogenesis of cardiovascular and inflammatory diseases. Dysfunction of anucleate platelets is likely to be completely attributable to alterations in posttranslational modifications and protein expression. We therefore examined the proteome of platelets highly purified from fresh blood donations, using elaborate protocols to ensure negligible contamination by leukocytes, erythrocytes, and plasma. Using quantitative mass spectrometry, we created the first comprehensive and quantitative human platelet proteome, comprising almost 4000 unique proteins, estimated copy numbers for ∼ 3700 of those, and assessed intersubject (4 donors) as well as intrasubject (3 different blood samples from 1 donor) variations of the proteome. For the first time, our data allow for a systematic and weighted appraisal of protein networks and pathways in human platelets, and indicate the feasibility of differential and comprehensive proteome analyses from small blood donations. Because 85% of the platelet proteome shows no variation between healthy donors, this study represents the starting point for disease-oriented platelet proteomics. In the near future, comprehensive and quantitative comparisons between normal and well-defined dysfunctional platelets, or between platelets obtained from donors at various stages of chronic cardiovascular and inflammatory diseases will be feasible.
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Homers regulate calcium entry and aggregation in human platelets: a role for Homers in the association between STIM1 and Orai1. Biochem J 2012; 445:29-38. [DOI: 10.1042/bj20120471] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Homer is a family of cytoplasmic adaptor proteins that play different roles in cell function, including the regulation of G-protein-coupled receptors. These proteins contain an Ena (Enabled)/VASP (vasodilator-stimulated phosphoprotein) homology 1 domain that binds to the PPXXF sequence motif, which is present in different Ca2+-handling proteins such as IP3 (inositol 1,4,5-trisphosphate) receptors and TRPC (transient receptor potential canonical) channels. In the present study we show evidence for a role of Homer proteins in the STIM1 (stromal interaction molecule 1)–Orai1 association, as well as in the TRPC1–IP3RII (type II IP3 receptor) interaction, which might be of relevance in platelet function. Treatment of human platelets with thapsigargin or thrombin results in a Ca2+-independent association of Homer1 with TRPC1 and IP3RII. In addition, thapsigargin and thrombin enhanced the association of Homer1 with STIM1 and Orai1 in a Ca2+-dependent manner. Interference with Homer function by introduction of the synthetic PPKKFR peptide into cells, which emulates the proline-rich sequences of the PPXXF motif, reduced STIM1–Orai1 and TRPC1– IP3RII associations, as compared with the introduction of the inactive PPKKRR peptide. The PPKKFR peptide attenuates thrombin-evoked Ca2+ entry and the maintenance of thapsigargin-induced store-operated Ca2+ entry. Finally, the PPKKFR peptide attenuated thrombin-induced platelet aggregation. The findings of the present study support an important role for Homer proteins in thrombin-stimulated platelet function, which is likely to be mediated by the support of agonist-induced Ca2+ entry.
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Abstract
Platelets play a vital role in maintaining haemostasis. Human platelet activation depends on Ca2+ release, leading to cell activation, granule secretion and aggregation. NAADP (nicotinic acid-adenine dinucleotide phosphate) is a Ca2+-releasing second messenger that acts on acidic Ca2+ stores and is used by a number of mammalian systems. In human platelets, NAADP has been shown to release Ca2+ in permeabilized human platelets and contribute to thrombin-mediated platelet activation. In the present study, we have further characterized NAADP-mediated Ca2+ release in human platelets in response to both thrombin and the GPVI (glycoprotein VI)-specific agonist CRP (collagen-related peptide). Using a radioligand-binding assay, we reveal an NAADP-binding site in human platelets, indicative of a platelet NAADP receptor. We also found that NAADP releases loaded 45Ca2+ from intracellular stores and that total platelet Ca2+ release is inhibited by the proton ionophore nigericin. Ned-19, a novel cell-permeant NAADP receptor antagonist, competes for the NAADP-binding site in platelets and can inhibit both thrombin- and CRP-induced Ca2+ release in human platelets. Ned-19 has an inhibitory effect on platelet aggregation, secretion and spreading. In addition, Ned-19 extends the clotting time in whole-blood samples. We conclude that NAADP plays an important role in human platelet function. Furthermore, the development of Ned-19 as an NAADP receptor antagonist provides a potential avenue for platelet-targeted therapy and the regulation of thrombosis.
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31
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A live cell micro-imaging technique to examine platelet calcium signaling dynamics under blood flow. Methods Mol Biol 2012; 788:73-89. [PMID: 22130701 DOI: 10.1007/978-1-61779-307-3_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The platelet is a specialized adhesive cell that plays a key role in thrombus formation under both physiological and pathological blood flow conditions. Platelet adhesion and activation are dynamic processes associated with rapid morphological and functional changes, with the earliest signaling events occurring over a subsecond time-scale. The relatively small size of platelets combined with the dynamic nature of platelet adhesion under blood flow means that the investigation of platelet signaling events requires techniques with both high spatial discrimination and rapid temporal resolution. Unraveling the complex signaling processes governing platelet adhesive function under conditions of hemodynamic shear stress has been a longstanding goal in platelet research and has been greatly influenced by the development and application of microimaging-based techniques. Advances in the area of epi-fluorescence and confocal-based platelet calcium (Ca(2+)) imaging have facilitated the in vitro and in vivo elucidation of the early signaling events regulating platelet adhesion and activation. These studies have identified distinct Ca(2+) signaling mechanisms that serve to dynamically regulate activation of the major platelet integrin α(IIb)β(3) and associated adhesion and aggregation processes under flow. This chapter describes in detail a ratiometric calcium imaging protocol and associated troubleshooting procedures developed in our laboratory to examine live platelet Ca(2+) signaling dynamics. This technique provides a method for high-resolution imaging of the Ca(2+) dynamics underpinning platelet adhesion and thrombus formation under conditions of pathophysiological shear stress.
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Pyridine nucleotide metabolites and calcium release from intracellular stores. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 740:305-23. [PMID: 22453948 DOI: 10.1007/978-94-007-2888-2_13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Ca(2+) signals are probably the most common intracellular signaling elements, controlling an extensive range of responses in virtually all cells. Many cellular stimuli, often acting at cell surface receptors, evoke Ca(2+) signals by mobilizing Ca(2+) from intracellular stores. Inositol trisphosphate (IP₃) was the first messenger shown to link events at the plasma membrane to release of Ca(2+) from the endoplasmic reticulum (ER), through activation of IP₃-gated Ca(2+) release channels (IP₃ receptors). Subsequently, two additional Ca(2+) mobilizing messengers were discovered, cADPR and NAADP. Both are metabolites of pyridine nucleotides, and may be produced by the same class of enzymes, ADP-ribosyl cyclases, such as CD38. Whilst cADPR mobilizes Ca(2+) from the ER by activation of ryanodine receptors (RyRs), NAADP releases Ca(2+) from acidic stores by a mechanism involving the activation of two pore channels (TPCs).
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Molecular mechanisms of endolysosomal Ca2+ signalling in health and disease. Biochem J 2011; 439:349-74. [PMID: 21992097 DOI: 10.1042/bj20110949] [Citation(s) in RCA: 295] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Endosomes, lysosomes and lysosome-related organelles are emerging as important Ca2+ storage cellular compartments with a central role in intracellular Ca2+ signalling. Endocytosis at the plasma membrane forms endosomal vesicles which mature to late endosomes and culminate in lysosomal biogenesis. During this process, acquisition of different ion channels and transporters progressively changes the endolysosomal luminal ionic environment (e.g. pH and Ca2+) to regulate enzyme activities, membrane fusion/fission and organellar ion fluxes, and defects in these can result in disease. In the present review we focus on the physiology of the inter-related transport mechanisms of Ca2+ and H+ across endolysosomal membranes. In particular, we discuss the role of the Ca2+-mobilizing messenger NAADP (nicotinic acid adenine dinucleotide phosphate) as a major regulator of Ca2+ release from endolysosomes, and the recent discovery of an endolysosomal channel family, the TPCs (two-pore channels), as its principal intracellular targets. Recent molecular studies of endolysosomal Ca2+ physiology and its regulation by NAADP-gated TPCs are providing exciting new insights into the mechanisms of Ca2+-signal initiation that control a wide range of cellular processes and play a role in disease. These developments underscore a new central role for the endolysosomal system in cellular Ca2+ regulation and signalling.
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Rosado J. Acidic Ca2+ stores in platelets. Cell Calcium 2011; 50:168-74. [DOI: 10.1016/j.ceca.2010.11.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Revised: 11/25/2010] [Accepted: 11/27/2010] [Indexed: 02/06/2023]
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35
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Lacerda SHDP, Semberova J, Holada K, Simakova O, Hudson SD, Simak J. Carbon nanotubes activate store-operated calcium entry in human blood platelets. ACS NANO 2011; 5:5808-13. [PMID: 21639133 DOI: 10.1021/nn2015369] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Carbon nanotubes (CNTs) are known to potentiate arterial thrombosis in animal models, which raises serious safety issues concerning environmental or occupational exposure to CNTs and their use in various biomedical applications. We have shown previously that different CNTs, but not fullerene (nC60), induce the aggregation of human blood platelets. To date, however, a mechanism of potentially thrombogenic CNT-induced platelet activation has not been elucidated. Here we show that pristine multiwalled CNTs (MWCNTs) penetrate platelet plasma membrane without any discernible damage but interact with the dense tubular system (DTS) causing depletion of platelet intracellular Ca(2+) stores. This process is accompanied by the clustering of stromal interaction molecule 1 (STIM1) colocalized with Orai1, indicating the activation of store-operated Ca(2+) entry (SOCE). Our findings reveal the molecular mechanism of CNT-induced platelet activation which is critical in the evaluation of the biocompatibility of carbon nanomaterials with blood.
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Affiliation(s)
- Silvia H De Paoli Lacerda
- Center for Biologics Evaluation and Research, Food and Drug Administration, Rockville, Maryland 20852-1448, USA
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36
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Arbabian A, Brouland JP, Gélébart P, Kovàcs T, Bobe R, Enouf J, Papp B. Endoplasmic reticulum calcium pumps and cancer. Biofactors 2011; 37:139-49. [PMID: 21674635 DOI: 10.1002/biof.142] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Accepted: 12/15/2010] [Indexed: 12/11/2022]
Abstract
Endoplasmic reticulum calcium homeostasis is involved in a multitude of signaling, as well as "house-keeping" functions that control cell growth, differentiation or apoptosis in every human/eukaryotic cell. Calcium is actively accumulated in the endoplasmic reticulum by Sarco/Endoplasmic Reticulum Calcium transport ATPases (SERCA enzymes). SERCA-dependent calcium transport is the only calcium uptake mechanism in this organelle, and therefore the regulation of SERCA function by the cell constitutes a key mechanism to adjust calcium homeostasis in the endoplasmic reticulum depending on the cell type and its state of differentiation. The direct pharmacological modulation of SERCA activity affects cell differentiation and survival. SERCA expression levels can undergo significant changes during cell differentiation or tumorigenesis, leading to modified endoplasmic reticulum calcium storage. In several cell types such as cells of hematopoietic origin or various epithelial cells, two SERCA genes (SERCA2 and SERCA3) are simultaneously expressed. Expression levels of SERCA3, a lower calcium affinity calcium pump are highly variable. In several cell systems SERCA3 expression is selectively induced during differentiation, whereas during tumorigenesis and blastic transformation SERCA3 expression is decreased. These observations point at the existence of a cross-talk, via the regulation of SERCA3 levels, between endoplasmic reticulum calcium homeostasis and the control of cell differentiation, and show that endoplasmic reticulum calcium homeostasis itself can undergo remodeling during differentiation. The investigation of the anomalies of endoplasmic reticulum differentiation in tumor and leukemia cells may be useful for a better understanding of the contribution of calcium signaling to the establishment of malignant phenotypes.
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Affiliation(s)
- Atousa Arbabian
- Institut National de la Santé et de la Recherche Médicale, Inserm UMR-S, Institut Universitaire d'Hématologie, Université Paris Diderot-Paris, France
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37
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NAADP as an intracellular messenger regulating lysosomal calcium-release channels. Biochem Soc Trans 2011; 38:1424-31. [PMID: 21118101 DOI: 10.1042/bst0381424] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recent studies into the mechanisms of action of the Ca(2+)-mobilizing messenger NAADP (nicotinic acid-adenine dinucleotide phosphate) have demonstrated that a novel family of intracellular Ca(2+)-release channels termed TPCs (two-pore channels) are components of the NAADP receptor. TPCs appear to be exclusively localized to the endolysosomal system. These findings confirm previous pharmacological and biochemical studies suggesting that NAADP targets acidic Ca(2+) stores rather than the endoplasmic reticulum, the major site of action of the other two principal Ca(2+)-mobilizing messengers, InsP(3) and cADPR (cADP-ribose). Studies of the messenger roles of NAADP and the function of TPCs highlight the novel role of lysosomes and other organelles of the endocytic pathway as messenger-regulated Ca(2+) stores which also affects the regulation of the endolysosomal system.
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38
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Mushtaq M, Nam TS, Kim UH. Critical role for CD38-mediated Ca2+ signaling in thrombin-induced procoagulant activity of mouse platelets and hemostasis. J Biol Chem 2011; 286:12952-8. [PMID: 21339289 DOI: 10.1074/jbc.m110.207100] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
CD38, a multifunctional enzyme that catalyzes the synthesis of intracellular Ca(2+) messengers, cyclic ADP-ribose (cADPR) and nicotinic acid adenine dinucleotide phosphate (NAADP), is known to be expressed on platelets. However, the role of CD38 in platelets remains unclear. Our present results show that treatment of platelets with thrombin results in a rapid and sustained Ca(2+) signal, resulting from a coordinated interplay of Ca(2+)-mobilizing messengers, inositol 1,4,5-trisphosphate, cADPR, and NAADP. By dissecting the signaling pathway using various agents, we delineated that cADPR and NAADP are sequentially produced through CD38 internalization by protein kinase C via myosin heavy chain IIA following phospholipase C activation in thrombin-induced platelets. An inositol 1,4,5-trisphosphate receptor antagonist blocked the thrombin-induced formation of cADPR and NAADP as well as Ca(2+) signals. An indispensable response of platelets relying on cytosolic calcium is the surface exposure of phosphatidylserine (PS), which implicates platelet procoagulant activity. Scrutinizing this parameter reveals that CD38(+/+) platelets fully express PS on the surface when stimulated with thrombin, whereas this response was decreased on CD38(-/-) platelets. Similarly, PS exposure and Ca(2+) signals were attenuated when platelets were incubated with 8-bromo-cADPR, bafilomycin A1, and a PKC inhibitor. Furthermore, in vivo, CD38-deficient mice exhibited longer bleeding times and unstable formation of thrombus than wild type mice. These results demonstrate that CD38 plays an essential role in thrombin-induced procoagulant activity of platelets and hemostasis via Ca(2+) signaling mediated by its products, cADPR and NAADP.
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Affiliation(s)
- Mazhar Mushtaq
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju 561-182, Korea
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39
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Abstract
Of the established Ca(2+) mobilizing messengers, NAADP is arguably the most tantalizing. It is the most potent, often efficacious at low nanomolar concentrations. Recent studies have identified a new class of calcium release channel, the two-pore channels (TPCs), as the likely targets for NAADP. These channels are endolysosomal in localization where they mediate local Ca(2+) release, and have highlighted a new role of acidic organelles as targets for messenger-evoked Ca(2+) mobilization. Three distinct roles of TPCs have been identified. The first is to effect local Ca(2+) release that may play a role in endolysosomal function including vesicular fusion and trafficking. The second is to trigger global calcium release by recruiting Ca(2+)-induced Ca(2+) release (CICR) channels at lysosomal-ER junctions. The third is to regulate plasma membrane excitability by the targeting of Ca(2+) release from appropriately positioned subplasma membrane stores to regulate plasma membrane Ca(2+)-activated channels. In this review, I discuss the role of NAADP-mediated Ca(2+) release from endolysosomal stores as a widespread trigger for intracellular calcium signaling mechanisms, and how studies of TPCs are beginning to enhance our understanding of the central role of lysosomes in Ca(2+) signaling.
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Affiliation(s)
- Antony Galione
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, United Kingdom.
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40
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Chatterjee MS, Purvis JE, Brass LF, Diamond SL. Pairwise agonist scanning predicts cellular signaling responses to combinatorial stimuli. Nat Biotechnol 2010; 28:727-32. [PMID: 20562863 PMCID: PMC3010846 DOI: 10.1038/nbt.1642] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2009] [Accepted: 05/06/2010] [Indexed: 11/29/2022]
Abstract
Patient-specific prediction of cellular response to multiple stimuli is central to evaluating clinical risk, disease progression, and response to therapy. We deployed Pairwise Agonist Scanning (PAS) to measure calcium signaling of human platelets in EDTA-treated plasma exposed to 6 different agonists (at 0.1, 1, and 10×EC50) used individually or in 135 pairwise combinations. With 154 traces, we trained a neural network (NN) model to accurately predict the entire 6-dimensional response to ADP, convulxin, U46619, SFLLRN, AYPGKF, and PGE2. The NN successfully predicted calcium responses to sequential agonist additions, all ternary combinations of [ADP]+[convulxin]+[SFLLRN] (R=0.88), and 45 different combinations of 4 to 6 agonists (R=0.88). Furthermore, PAS provided 135 pairwise synergy values that allowed a unique phenotypic scoring and differentiation of 10 donors. Training of NNs with pairs of stimuli across the dose-response regime represents a highly efficient approach to predict integration of multiple, complex signals in a patient-specific disease milieu.
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Affiliation(s)
- Manash S Chatterjee
- Institute for Medicine and Engineering, Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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41
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Sandgren P, Mayaudon V, Payrat JM, Sjödin A, Gulliksson H. Storage of buffy-coat-derived platelets in additive solutions:in vitroeffects on platelets stored in reformulated PAS supplied by a 20% plasma carry-over. Vox Sang 2010; 98:415-22. [DOI: 10.1111/j.1423-0410.2009.01255.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Semberova J, De Paoli Lacerda SH, Simakova O, Holada K, Gelderman MP, Simak J. Carbon nanotubes activate blood platelets by inducing extracellular Ca2+ influx sensitive to calcium entry inhibitors. NANO LETTERS 2009; 9:3312-7. [PMID: 19736974 DOI: 10.1021/nl901603k] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
To elucidate a mechanism of prothrombotic effects of carbon nanotubes (CNTs), we report here that multiwalled CNTs activate blood platelets by inducing extracellular Ca(2+) influx that could be inhibited by calcium channel blockers SKF 96365 and 2-APB. We also demonstrate platelet aggregating activity of different single-walled and multiwalled CNTs. In addition, we show that CNT-induced platelet activation is associated with a marked release of platelet membrane microparticles positive for the granular secretion markers CD62P and CD63.
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Affiliation(s)
- Jana Semberova
- Center for Biologics Evaluation and Research, Food and Drug Administration, Rockville, Maryland 20852-1448, USA
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43
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Abstract
Agonist-induced elevation in cytosolic Ca2+ concentrations is essential for platelet activation in hemostasis and thrombosis. It occurs through Ca2+ release from intracellular stores and Ca2+ entry through the plasma membrane (PM). Ca2+ store release is a well-established process involving phospholipase (PL)C-mediated production of inositol-1,4,5-trisphosphate (IP3), which in turn releases Ca2+ from the intracellular stores through IP3 receptor channels. In contrast, the mechanisms controlling Ca2+ entry and the significance of this process for platelet activation have been elucidated only very recently. In platelets, as in other non-excitable cells, the major way of Ca2+ entry involves the agonist-induced release of cytosolic sequestered Ca2+ followed by Ca2+ influx through the PM, a process referred to as store-operated calcium entry (SOCE). It is now clear that stromal interaction molecule 1 (STIM1), a Ca2+ sensor molecule in intracellular stores, and the four transmembrane channel protein Orai1 are the key players in platelet SOCE. The other major Ca2+ entry mechanism is mediated by the direct receptor-operated calcium (ROC) channel, P2X1. Besides these, canonical transient receptor potential channel (TRPC) 6 mediates Ca2+ entry through the PM. This review summarizes the current knowledge of platelet Ca2+ homeostasis with a focus on the newly identified Ca2+ entry mechanisms.
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Affiliation(s)
- D Varga-Szabo
- Chair of Vascular Medicine and Rudolf Virchow Center, DFG Research Center for Experimental Biomedicine, University of Würzburg, Würzburg, Germany
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Phenolphthalein as a prototype drug for a group of structurally related calcium channel blockers in human platelets. J Cardiovasc Pharmacol 2009; 53:231-40. [PMID: 19247192 DOI: 10.1097/fjc.0b013e31819b5494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Thrombin increases intracellular free Ca ([Ca]i) in human platelets by 2 mechanisms: internal mobilization and the influx of Ca via store-operated Ca entry (SOCE). 2-Aminoethoxydiphenyl borate (2-APB) is an inhibitor of SOCE. In search for nonboron analogues of 2-APB, we identified a well-known compound, phenolphthalein, structurally related to 2-APB. Many phenolphthalein analogues inhibited the ability of thrombin and thapsigargin (a specific activator of SOCE) to increase [Ca]i. Phenolphthalein has an IC50 approximately 10 microM to inhibit thrombin-induced [Ca]i elevation, its active analogues have a similar potency. Several phenolphthalein analogues also inhibited thrombin-induced intracellular Ca mobilization, which indicates action on inositol 1,4,5-trisphosphate receptors. We identified structural features among active and inactive phenolphthalein analogues that are responsible for the activity. Opening of the 5-membered lactone ring of phenolphthalein resulted in a total loss of activity. If the diphenyl rings possessed primary amine, dimethyl amine, or a cyano group, there was no activity. Modifications to the diphenyl groups that were tolerated include phosphate, sulfate, iodine, bromine, methyl, nitrite, and methoxy. Inhibition of thrombin-induced [Ca]i increase by phenolphthalein was not mediated by an increase in cyclic adenosine monophosphate because the inhibitor of cyclic adenosine monophosphate-dependent protein kinase A, 4-cyano-3-methylisoquinoline, did not affect the inhibitory action of phenolphthalein. The inhibitory effect of phenolphthalein was not mediated by an increase in NO/cyclic guanosine monophosphate (cGMP) because the inhibitors of NO-sensitive soluble guanylyl cyclase, methylene blue, and ODQ did not affect the inhibition. Phytohemagglutinin and thapsigargin-induced SOCE in Jurkat cells was also inhibited by phenolphthalein and 2-APB to the same extent as seen in platelets. Therefore, phenolphthalein and its derivatives structurally similar to 2-APB inhibit SOCE in platelets and other cells.
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