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Liu Y, Jiang H, Kang T, Shi X, Liu X, Li C, Hou X, Li M. Platelets-related signature based diagnostic model in rheumatoid arthritis using WGCNA and machine learning. Front Immunol 2023; 14:1204652. [PMID: 37426641 PMCID: PMC10327425 DOI: 10.3389/fimmu.2023.1204652] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 06/12/2023] [Indexed: 07/11/2023] Open
Abstract
Background and aim Rheumatoid arthritis (RA) is an autoinflammatory disease that may lead to severe disability. The diagnosis of RA is limited due to the need for biomarkers with both reliability and efficiency. Platelets are deeply involved in the pathogenesis of RA. Our study aims to identify the underlying mechanism and screening for related biomarkers. Methods We obtained two microarray datasets (GSE93272 and GSE17755) from the GEO database. We performed Weighted correlation network analysis (WGCNA) to analyze the expression modules in differentially expressed genes identified from GSE93272. We used KEGG, GO and GSEA enrichment analysis to elucidate the platelets-relating signatures (PRS). We then used the LASSO algorithm to develop a diagnostic model. We then used GSE17755 as a validation cohort to assess the diagnostic performance by operating Receiver Operating Curve (ROC). Results The application of WGCNA resulted in the identification of 11 distinct co-expression modules. Notably, Module 2 exhibited a prominent association with platelets among the differentially expressed genes (DEGs) analyzed. Furthermore, a predictive model consisting of six genes (MAPK3, ACTB, ACTG1, VAV2, PTPN6, and ACTN1) was constructed using LASSO coefficients. The resultant PRS model demonstrated excellent diagnostic accuracy in both cohorts, as evidenced by area under the curve (AUC) values of 0.801 and 0.979. Conclusion We elucidated the PRSs occurred in the pathogenesis of RA and developed a diagnostic model with excellent diagnostic potential.
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Affiliation(s)
- Yuchen Liu
- School of Clinical Medicine, Peking Union Medical College, Beijing, China
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Haixu Jiang
- Department of Rheumatology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Tianlun Kang
- Department of Rheumatology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaojun Shi
- Department of Rheumatology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaoping Liu
- Department of Rheumatology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Chen Li
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Department of Rheumatology, Fangshan Hospital Beijing University of Chinese Medicine, Beijing, China
| | - Xiujuan Hou
- Department of Rheumatology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Meiling Li
- Department of Rheumatology, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China
- Department of Rheumatology, The Second Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
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2
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Li Y, Wang H, Zhao Z, Yang Y, Meng Z, Qin L. Effects of the interactions between platelets with other cells in tumor growth and progression. Front Immunol 2023; 14:1165989. [PMID: 37153586 PMCID: PMC10158495 DOI: 10.3389/fimmu.2023.1165989] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/31/2023] [Indexed: 05/09/2023] Open
Abstract
It has been confirmed that platelets play a key role in tumorigenesis. Tumor-activated platelets can recruit blood cells and immune cells to migrate, establish an inflammatory tumor microenvironment at the sites of primary and metastatic tumors. On the other hand, they can also promote the differentiation of mesenchymal cells, which can accelerate the proliferation, genesis and migration of blood vessels. The role of platelets in tumors has been well studied. However, a growing number of studies suggest that interactions between platelets and immune cells (e.g., dendritic cells, natural killer cells, monocytes, and red blood cells) also play an important role in tumorigenesis and tumor development. In this review, we summarize the major cells that are closely associated with platelets and discuss the essential role of the interaction between platelets with these cells in tumorigenesis and tumor development.
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3
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Konijnenberg LSF, Zugwitz D, Everaars H, Hoeven NWVD, Demirkiran A, Rodwell L, van Leeuwen MA, van Rossum AC, El Messaoudi S, Riksen NP, Royen NV, Nijveldt R. Effect of ticagrelor and prasugrel on remote myocardial inflammation in patients with acute myocardial infarction with ST-elevation: a CMR T1 and T2 mapping study. Int J Cardiovasc Imaging 2022; 39:767-779. [PMID: 36494503 DOI: 10.1007/s10554-022-02765-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 11/19/2022] [Indexed: 12/13/2022]
Abstract
PURPOSE Acute myocardial ischaemia triggers a non-specific inflammatory response of remote myocardium through the increase of plasma concentrations of acute-phase proteins, which causes myocardial oedema. As ticagrelor has been shown to significantly decrease circulating levels of several pro-inflammatory cytokines in patients after acute myocardial infarction with ST-elevation (STEMI), we sought to investigate a potential suppressive effect of ticagrelor over prasugrel on cardiac magnetic resonance (CMR) T1 and T2 values in remote myocardium. METHODS Ninety STEMI patients were prospectively included and randomised to receive either ticagrelor or prasugrel maintenance treatment after successful primary percutaneous coronary intervention. Patients underwent CMR after 2-7 days. The protocol included long and short axis cine imaging, T1 mapping, T2 mapping and late gadolinium enhancement imaging. RESULTS After excluding 30 patients due to either missing images or insufficient quality of the T1 or T2 maps, 60 patients were included in our analysis. Of those, 29 patients were randomised to the ticagrelor group and 31 patients to the prasugrel group. In the remote myocardium, T1 values did not differ between groups (931.3 [919.4-950.4] ms for ticagrelor vs. 932.6 [915.5-949.2] ms for prasugrel (p = 0.94)), nor did the T2 values (53.8 ± 4.6 ms for ticagrelor vs. 53.7 ± 4.7 ms for prasugrel (p = 0.86)). Also, in the infarcted myocardium, T1 and T2 values did not differ between groups. CONCLUSION In revascularised STEMI patients, ticagrelor maintenance therapy did not show superiority over prasugrel in preventing early remote myocardial inflammation as assessed by CMR T1 and T2 mapping.
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4
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Liao XX, Wu XY, Zhou YL, Li JJ, Wen YL, Zhou JJ. Gut microbiome metabolites as key actors in atherosclerosis co-depression disease. Front Microbiol 2022; 13:988643. [PMID: 36439791 PMCID: PMC9686300 DOI: 10.3389/fmicb.2022.988643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 10/24/2022] [Indexed: 02/26/2024] Open
Abstract
Cardiovascular diseases, mainly characterized by atherosclerosis (AS), and depression have a high comorbidity rate. However, previous studies have been conducted under a single disease, and there is a lack of studies in comorbid states to explore the commonalities in the pathogenesis of both diseases. Modern high-throughput technologies have made it clear that the gut microbiome can affect the development of the host's own disorders and have shown that their metabolites are crucial to the pathophysiology of AS and depression. The aim of this review is to summarize the current important findings on the role of gut microbiome metabolites such as pathogen-associated molecular patterns, bile acids, tryptophan metabolites, short-chain fatty acids, and trimethylamine N -oxide in depression and AS disease, with the aim of identifying potential biological targets for the early diagnosis and treatment of AS co-depression disorders.
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Affiliation(s)
- Xing-Xing Liao
- School of Rehabilitation Medicine, Gannan Medical University, Ganzhou, China
| | - Xiao-Yun Wu
- School of Basic Medicine, Gannan Medical University, Ganzhou, China
| | - Yu-Long Zhou
- School of Rehabilitation Medicine, Gannan Medical University, Ganzhou, China
| | - Jia-Jun Li
- School of Rehabilitation Medicine, Gannan Medical University, Ganzhou, China
| | - You-Liang Wen
- School of Rehabilitation Medicine, Gannan Medical University, Ganzhou, China
| | - Jun-Jie Zhou
- School of Rehabilitation Medicine, Gannan Medical University, Ganzhou, China
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou, China
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5
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Increase of Circulating Monocyte-Platelet Conjugates in Rheumatoid Arthritis Responders to IL-6 Blockage. Int J Mol Sci 2022; 23:ijms23105748. [PMID: 35628558 PMCID: PMC9144642 DOI: 10.3390/ijms23105748] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/11/2022] [Accepted: 05/17/2022] [Indexed: 02/01/2023] Open
Abstract
Platelets (PLT) bind to a significant percentage of circulating monocytes and this immunomodulatory interaction is increased in several inflammatory and autoimmune conditions. The therapeutic blockage of IL-6 with Tocilizumab (TCZ) alters PLT and the phenotype and function of monocytes in rheumatoid arthritis (RA). However, the relationship between monocyte−PLT conjugates (CD14+PLT+) and clinical and immunological variables and the regulation of this interaction by IL-6 blockage are still unknown. Here, we compared the presence of monocyte−PLT conjugates (CD14+PLT+) and membrane CD162 expression using flow cytometry, and, by ELISA, the markers of PLT activation (sCD62P and sCD40L) in healthy donors (HD) and patients with long-standing RA before TCZ (baseline). We found higher percentages and absolute counts of CD14+PLT+, and higher plasmatic levels of sCD62P and sCD40L but lower CD162 expression on monocytes from RA patients than those from HD. Additionally, the levels of CD14+PLT+ inversely correlated with inflammatory parameters. Interestingly, 95% of patients with lower percentages of CD14+PLT+ and only 63% of patients with higher percentages of CD14+PLT+ achieved a EULAR-defined response at four weeks (p = 0.036). After TCZ, the percentage of CD14+PLT+ increased in 92% of RA patients who achieved 12 w-remission (p < 0.001). Our results suggest that the binding of PLTs has a modulatory effect, accentuated by the increased binding of PLTs to monocytes in response to the therapeutic blockage of IL-6.
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Pluta K, Porębska K, Urbanowicz T, Gąsecka A, Olasińska-Wiśniewska A, Targoński R, Krasińska A, Filipiak KJ, Jemielity M, Krasiński Z. Platelet-Leucocyte Aggregates as Novel Biomarkers in Cardiovascular Diseases. BIOLOGY 2022; 11:biology11020224. [PMID: 35205091 PMCID: PMC8869671 DOI: 10.3390/biology11020224] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/19/2022] [Accepted: 01/24/2022] [Indexed: 12/18/2022]
Abstract
Simple Summary Cardiovascular diseases are the most common cause of death worldwide. Hence, novel biomarkers are urgently needed to improve diagnosis and treatment. Platelet–leucocyte aggregates are conglomerates of platelets and leucocytes and are widely investigated as biomarkers in cardiovascular diseases. Platelet–leucocytes aggregates are present in health, but increase in patients with cardiovascular risk factors and acute or stable coronary syndromes, making them a potential diagnostic marker. Moreover, platelet–leucocyte aggregates predict outcomes after surgery or percutaneous treatment and could be used to monitor antiplatelet therapy. Emerging data about the participation of platelet–leucocyte aggregates in cardiovascular diseases pathogenesis make them an attractive target for novel therapies. Furthermore, simple detection with conventional flow cytometry provides accurate and reproducible results, although requires specific sample handling. The main task for the future is to determine the standardized protocol to measure blood concentrations of platelet–leucocyte aggregates and subsequently establish their normal range in health and disease. Abstract Platelet–leucocyte aggregates (PLA) are a formation of leucocytes and platelets bound by specific receptors. They arise in the condition of sheer stress, thrombosis, immune reaction, vessel injury, and the activation of leukocytes or platelets. PLA participate in cardiovascular diseases (CVD). Increased levels of PLA were revealed in acute and chronic coronary syndromes, carotid stenosis cardiovascular risk factors. Due to accessible, available, replicable, quick, and low-cost quantifying using flow cytometry, PLA constitute an ideal biomarker for clinical practice. PLA are promising in early diagnosing and estimating prognosis in patients with acute or chronic coronary syndromes treated by percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG). PLA were also a reliable marker of platelet activity for monitoring antiplatelet therapy. PLA consist also targets potential therapies in CVD. All of the above potential clinical applications require further studies to validate methods of assay and proof clinical benefits.
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Affiliation(s)
- Kinga Pluta
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland; (K.P.); (K.P.)
| | - Kinga Porębska
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland; (K.P.); (K.P.)
| | - Tomasz Urbanowicz
- Department of Cardiac Surgery and Transplantology, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (T.U.); (A.O.-W.); (M.J.)
| | - Aleksandra Gąsecka
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Banacha 1a, 02-097 Warsaw, Poland; (K.P.); (K.P.)
- Correspondence: ; Tel.: +48-22-599-1951
| | - Anna Olasińska-Wiśniewska
- Department of Cardiac Surgery and Transplantology, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (T.U.); (A.O.-W.); (M.J.)
| | - Radosław Targoński
- 1st Department of Cardiology, Medical University of Gdansk, 80-210 Gdansk, Poland;
| | - Aleksandra Krasińska
- Department of Ophtalmology, Poznan University of Medical Sciences, 61-701 Poznan, Poland;
| | - Krzysztof J. Filipiak
- Department of Clinical Sciences, Maria Sklodowska-Curie Medical Academy in Warsaw, 00-136 Warsaw, Poland;
| | - Marek Jemielity
- Department of Cardiac Surgery and Transplantology, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (T.U.); (A.O.-W.); (M.J.)
| | - Zbigniew Krasiński
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, 61-701 Poznan, Poland;
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7
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Zou Y, Song X, Liu N, Sun W, Liu B. Intestinal Flora: A Potential New Regulator of Cardiovascular Disease. Aging Dis 2022; 13:753-772. [PMID: 35656118 PMCID: PMC9116925 DOI: 10.14336/ad.2021.1022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/22/2021] [Indexed: 12/02/2022] Open
Abstract
Although substantial progress has been made in reducing the burden of the disease by preventing the risk factors of cardiovascular disease (CVD), potential risk factors still exist and lead to its progression. In recent years, numerous studies have revealed that intestinal flora can interfere with the physiological processes of the host through changes in composition and function or related metabolites. Intestinal flora thus affects the occurrence and development of a variety of CVDs, including atherosclerosis, ischemic heart disease, and heart failure. Moreover, studies have found that interventions for intestinal flora and its metabolites provide new opportunities for CVD treatment. This article mainly discusses the interaction between the human intestinal flora and its metabolites, the occurrence and development of CVD, and the potential of intestinal flora as a new target for the diagnosis and treatment of CVD.
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Affiliation(s)
| | | | | | - Wei Sun
- Correspondence should be addressed to: Dr. Sun Wei () and Bin Liu (), Department of Cardiology, The Second Hospital of Jilin University, Changchun, China
| | - Bin Liu
- Correspondence should be addressed to: Dr. Sun Wei () and Bin Liu (), Department of Cardiology, The Second Hospital of Jilin University, Changchun, China
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8
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Buijsers B, Garishah FM, Riswari SF, van Ast RM, Pramudo SG, Tunjungputri RN, Overheul GJ, van Rij RP, van der Ven A, Alisjahbana B, Gasem MH, de Mast Q, van der Vlag J. Increased Plasma Heparanase Activity and Endothelial Glycocalyx Degradation in Dengue Patients Is Associated With Plasma Leakage. Front Immunol 2021; 12:759570. [PMID: 34987504 PMCID: PMC8722520 DOI: 10.3389/fimmu.2021.759570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 11/30/2021] [Indexed: 11/13/2022] Open
Abstract
Background Endothelial hyper-permeability with plasma leakage and thrombocytopenia are predominant features of severe dengue virus infection. It is well established that heparanase, the endothelial glycocalyx degrading enzyme, plays a major role in various diseases with vascular leakage. It is yet to be elucidated whether heparanase activity plays a major role in dengue-associated plasma leakage. Moreover, the major source of heparanase secretion and activation in dengue remains elusive. Since a relatively high amount of heparanase is stored in platelets, we postulate that heparanase released by activated platelets contributes to the increased plasma heparanase activity during dengue virus infection. Methods Heparanase activity (plasma and urine), and heparan sulfate and syndecan-1 (plasma levels) were measured in dengue patients with thrombocytopenia in acute phase (n=30), during course of disease (n=10) and in convalescent phase (n=25). Associations with clinical parameters and plasma leakage markers were explored. Platelets from healthy donors were stimulated with dengue non-structural protein-1, DENV2 virus and thrombin to evaluate heparanase release and activity ex vivo. Results Heparanase activity was elevated in acute dengue and normalized during convalescence. Similarly, glycocalyx components, such as heparan sulfate and syndecan-1, were increased in acute dengue and restored during convalescence. Increased heparanase activity correlated with the endothelial dysfunction markers heparan sulfate and syndecan-1, as well as clinical markers of plasma leakage such as ascites, hematocrit concentration and gall-bladder wall thickening. Notably, platelet number inversely correlated with heparanase activity. Ex vivo incubation of platelets with thrombin and live DENV2 virus, but not dengue virus-2-derived non-structural protein 1 induced heparanase release from platelets. Conclusion Taken together, our findings suggest that the increase of heparanase activity in dengue patients is associated with endothelial glycocalyx degradation and plasma leakage. Furthermore, thrombin or DENV2 activated platelets may be considered as a potential source of heparanase.
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Affiliation(s)
- Baranca Buijsers
- Department of Nephrology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Fadel Muhammad Garishah
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
- Center for Tropical and Infectious Diseases (CENTRID), Faculty of Medicine, Diponegoro University, Dr. Kariadi Hospital, Semarang, Indonesia
| | - Silvita Fitri Riswari
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
- Research Center for Care and Control of Infectious Disease (RC3ID), Universitas Padjadjaran, Bandung, Indonesia
- Department of Biomedical Sciences, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Rosalie M. van Ast
- Department of Nephrology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Setyo Gundi Pramudo
- Department of Internal Medicine, Diponegoro National University Hospital, Faculty of Medicine, Diponegoro University, Semarang, Indonesia
- Department of Internal Medicine, William Booth Hospital, Semarang, Indonesia
| | - Rahajeng N. Tunjungputri
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
- Center for Tropical and Infectious Diseases (CENTRID), Faculty of Medicine, Diponegoro University, Dr. Kariadi Hospital, Semarang, Indonesia
| | - Gijs J. Overheul
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Ronald P. van Rij
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - André van der Ven
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
| | - Bachti Alisjahbana
- Research Center for Care and Control of Infectious Disease (RC3ID), Universitas Padjadjaran, Bandung, Indonesia
- Department of Internal Medicine, Hasan Sadikin General Hospital, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Muhammad Hussein Gasem
- Center for Tropical and Infectious Diseases (CENTRID), Faculty of Medicine, Diponegoro University, Dr. Kariadi Hospital, Semarang, Indonesia
- Department of Internal Medicine, Diponegoro National University Hospital, Faculty of Medicine, Diponegoro University, Semarang, Indonesia
| | - Quirijn de Mast
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
| | - Johan van der Vlag
- Department of Nephrology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
- *Correspondence: Johan van der Vlag,
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Dias ML, O'Connor KM, Dempsey EM, O'Halloran KD, McDonald FB. Targeting the Toll-like receptor pathway as a therapeutic strategy for neonatal infection. Am J Physiol Regul Integr Comp Physiol 2021; 321:R879-R902. [PMID: 34612068 DOI: 10.1152/ajpregu.00307.2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Toll-like receptors (TLRs) are crucial transmembrane receptors that form part of the innate immune response. They play a role in the recognition of various microorganisms and their elimination from the host. TLRs have been proposed as vital immunomodulators in the regulation of multiple neonatal stressors that extend beyond infection such as oxidative stress and pain. The immune system is immature at birth and takes some time to become fully established. As such, babies are especially vulnerable to sepsis at this early stage of life. Findings suggest a gestational age-dependent increase in TLR expression. TLRs engage with accessory and adaptor proteins to facilitate recognition of pathogens and their activation of the receptor. TLRs are generally upregulated during infection and promote the transcription and release of proinflammatory cytokines. Several studies report that TLRs are epigenetically modulated by chromatin changes and promoter methylation upon bacterial infection that have long-term influences on immune responses. TLR activation is reported to modulate cardiorespiratory responses during infection and may play a key role in driving homeostatic instability observed during sepsis. Although complex, TLR signaling and downstream pathways are potential therapeutic targets in the treatment of neonatal diseases. By reviewing the expression and function of key Toll-like receptors, we aim to provide an important framework to understand the functional role of these receptors in response to stress and infection in premature infants.
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Affiliation(s)
- Maria L Dias
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Karen M O'Connor
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Eugene M Dempsey
- Irish Centre for Maternal and Child Health Research, University College Cork, Cork, Ireland.,Department of Pediatrics and Child Health, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland
| | - Ken D O'Halloran
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland.,Irish Centre for Maternal and Child Health Research, University College Cork, Cork, Ireland
| | - Fiona B McDonald
- Department of Physiology, School of Medicine, College of Medicine and Health, University College Cork, Cork, Ireland.,Irish Centre for Maternal and Child Health Research, University College Cork, Cork, Ireland
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10
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Garishah FM, Rother N, Riswari SF, Alisjahbana B, Overheul GJ, van Rij RP, van der Ven A, van der Vlag J, de Mast Q. Neutrophil Extracellular Traps in Dengue Are Mainly Generated NOX-Independently. Front Immunol 2021; 12:629167. [PMID: 34122402 PMCID: PMC8187769 DOI: 10.3389/fimmu.2021.629167] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 05/05/2021] [Indexed: 01/12/2023] Open
Abstract
Neutrophil extracellular traps (NETs) are increasingly recognized to play a role in the pathogenesis of viral infections, including dengue. NETs can be formed NADPH oxidase (NOX)-dependently or NOX-independently. NOX-independent NETs can be induced by activated platelets and are very potent in activating the endothelium. Platelet activation with thrombocytopenia and endothelial dysfunction are prominent features of dengue virus infection. We postulated that dengue infection is associated with NOX-independent NET formation, which is related to platelet activation, endothelial perturbation and increased vascular permeability. Using our specific NET assays, we investigated the time course of NET formation in a cohort of Indonesian dengue patients. We found that plasma levels of NETs were profoundly elevated and that these NETs were predominantly NOX-independent NETs. During early recovery phase (7-13 days from fever onset), total NETs correlated negatively with platelet number and positively with platelet P-selectin expression, the binding of von Willebrand factor to platelets and levels of Syndecan-1. Patients with gall bladder wall thickening, an early marker of plasma leakage, had a higher median level of total NETs. Ex vivo, platelets induced NOX-independent NET formation in a dengue virus non-structural protein 1 (NS1)-dependent manner. We conclude that NOX-independent NET formation is enhanced in dengue, which is most likely mediated by NS1 and activated platelets.
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Affiliation(s)
- Fadel Muhammad Garishah
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands.,Center for Tropical and Infectious Diseases (CENTRID), Faculty of Medicine, Diponegoro University, Dr. Kariadi Hospital, Semarang, Indonesia
| | - Nils Rother
- Department of Nephrology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Silvita Fitri Riswari
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands.,Research Center for Care and Control of Infectious Disease (RC3ID), Universitas Padjadjaran, Bandung, Indonesia.,Department of Biomedical Sciences, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Bachti Alisjahbana
- Research Center for Care and Control of Infectious Disease (RC3ID), Universitas Padjadjaran, Bandung, Indonesia.,Department of Internal Medicine, Hasan Sadikin General Hospital, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - Gijs J Overheul
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Ronald P van Rij
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - André van der Ven
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
| | - Johan van der Vlag
- Department of Nephrology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Quirijn de Mast
- Department of Internal Medicine and the Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands
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11
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Kirwan DE, Chong DLW, Friedland JS. Platelet Activation and the Immune Response to Tuberculosis. Front Immunol 2021; 12:631696. [PMID: 34093524 PMCID: PMC8170316 DOI: 10.3389/fimmu.2021.631696] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 05/04/2021] [Indexed: 12/24/2022] Open
Abstract
In 2019 10 million people developed symptomatic tuberculosis (TB) disease and 1.2 million died. In active TB the inflammatory response causes tissue destruction, which leads to both acute morbidity and mortality. Tissue destruction in TB is driven by host innate immunity and mediated via enzymes, chiefly matrix metalloproteinases (MMPs) which are secreted by leukocytes and stromal cells and degrade the extracellular matrix. Here we review the growing evidence implicating platelets in TB immunopathology. TB patients typically have high platelet counts, which correlate with disease severity, and a hypercoagulable profile. Platelets are present in human TB granulomas and platelet-associated gene transcripts are increased in TB patients versus healthy controls. Platelets most likely drive TB immunopathology through their effect on other immune cells, particularly monocytes, to lead to upregulation of activation markers, increased MMP secretion, and enhanced phagocytosis. Finally, we consider current evidence supporting use of targeted anti-platelet agents in the treatment of TB due to growing interest in developing host-directed therapies to limit tissue damage and improve treatment outcomes. In summary, platelets are implicated in TB disease and contribute to MMP-mediated tissue damage via their cellular interactions with other leukocytes, and are potential targets for novel host-directed therapies.
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Affiliation(s)
- Daniela E Kirwan
- Institute for Infection & Immunity, St. George's, University of London, London, United Kingdom
| | - Deborah L W Chong
- Institute for Infection & Immunity, St. George's, University of London, London, United Kingdom
| | - Jon S Friedland
- Institute for Infection & Immunity, St. George's, University of London, London, United Kingdom
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12
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Carnevale R, Sciarretta S, Valenti V, di Nonno F, Calvieri C, Nocella C, Frati G, Forte M, d'Amati G, Pignataro MG, Severino A, Cangemi R, Arrivi A, Dominici M, Mangieri E, Gaudio C, Tanzilli G, Violi F. Low-grade endotoxaemia enhances artery thrombus growth via Toll-like receptor 4: implication for myocardial infarction. Eur Heart J 2021; 41:3156-3165. [PMID: 31898723 DOI: 10.1093/eurheartj/ehz893] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/04/2019] [Accepted: 12/10/2019] [Indexed: 12/15/2022] Open
Abstract
AIMS Low-grade endotoxaemia is detectable in human circulation but its role in thrombosis is still unclear. METHODS AND RESULTS We measured serum lipopolysaccharide (LPS) concentration, soluble P-selectin (sP-selectin), a marker of platelet activation, and zonulin, a marker of gut permeability, in peripheral circulation, coronary thrombi, and intracoronary blood of patients with ST-elevation myocardial infarction (STEMI, n = 50) and stable angina (SA) (n = 50), respectively, and in controls (n = 50). Experimental study was carried out in mice to assess if Escherichia coli-LPS (E. coli-LPS) possess thrombotic property. Coronary thrombi from STEMI showed higher concentrations of LPS, sP-selectin vs. intracoronary blood of SA and peripheral blood of controls (P < 0.001). Zonulin was higher in STEMI compared to the other two groups [4.57 (3.34-5.22); 2.56 (0.41-4.36); 1.95 (1.22-2.65) ng/mL; P < 0.001] and correlated with LPS (Rs = 0.585; P < 0.001). Escherichia coli DNA was positive in 34% of STEMI vs. 12% of SA and 4% of controls (P < 0.001). In a subgroup of 12 STEMI, immunohistochemical analysis of coronary thrombi showed positivity for leucocyte Toll-like receptor 4 (TLR4), cathepsin G, and LPS from E. coli in 100%, 80%, and 25% of samples, respectively. E. coli-LPS injected in mice to reach LPS concentrations like those detected in coronary thrombi was associated with enhanced artery thrombosis and platelet activation, an effect blunted by TLR4 inhibitor co-administration. In vitro study demonstrated that LPS from E. coli enhanced platelet aggregation via TLR4-mediated leucocyte cathepsin G activation. CONCLUSION ST-elevation myocardial infarction patients disclose an enhanced gut permeability that results in LPS translocation in human circulation and eventually thrombus growth at site of artery lesion via leucocyte-platelet interaction.
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Affiliation(s)
- Roberto Carnevale
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Corso della Repubblica 79, Latina 04100, Italy.,Mediterranea Cardiocentro, via Orazio 2, Napoli 80122, Italy
| | - Sebastiano Sciarretta
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Corso della Repubblica 79, Latina 04100, Italy.,IRCCS NeuroMed, via Atinense 18, Pozzilli 86077, Italy
| | - Valentina Valenti
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Corso della Repubblica 79, Latina 04100, Italy
| | | | - Camilla Calvieri
- Department of Cardiovascular, Respiratory, Nephrology, Anesthesiology and Geriatric Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Cristina Nocella
- Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Giacomo Frati
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Corso della Repubblica 79, Latina 04100, Italy.,IRCCS NeuroMed, via Atinense 18, Pozzilli 86077, Italy
| | | | - Giulia d'Amati
- Department of Radiological, Oncological and Pathological Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Maria G Pignataro
- Department of Radiological, Oncological and Pathological Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Anna Severino
- Institute of Cardiology, Catholic University of the Sacred Heart, Largo Francesco Vito 1, Rome 00168, Italy
| | - Roberto Cangemi
- Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Alessio Arrivi
- Interventional Cardiology Unit, Santa Maria Hospital, Viale Tristano di Joannuccio, Terni 05100, Italy
| | - Marcello Dominici
- Interventional Cardiology Unit, Santa Maria Hospital, Viale Tristano di Joannuccio, Terni 05100, Italy
| | - Enrico Mangieri
- Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Carlo Gaudio
- Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Gaetano Tanzilli
- Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
| | - Francesco Violi
- Mediterranea Cardiocentro, via Orazio 2, Napoli 80122, Italy.,Department of Clinical, Internal Medicine, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, Viale del Policlinico 155, Rome 00161, Italy
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13
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Mariscal A, Zamora C, Magallares B, Salman-Monte TC, Ortiz MÀ, Díaz-Torné C, Castellví I, Corominas H, Vidal S. Phenotypic and Functional Consequences of PLT Binding to Monocytes and Its Association with Clinical Features in SLE. Int J Mol Sci 2021; 22:4719. [PMID: 33947017 PMCID: PMC8125177 DOI: 10.3390/ijms22094719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 12/15/2022] Open
Abstract
Platelets (PLTs) can modulate the immune system through the release of soluble mediators or through interaction with immune cells. Monocytes are the main immune cells that bind with PLTs, and this interaction is increased in several inflammatory and autoimmune conditions, including systemic lupus erythematosus (SLE). Our aim was to characterize the phenotypic and functional consequences of PLT binding to monocytes in healthy donors (HD) and in SLE and to relate it to the pathogenesis of SLE. We analyzed the phenotypic and functional features of monocytes with non-activated and activated bound PLTs by flow cytometry. We observed that monocytes with bound PLTs and especially those with activated PLTs have an up-regulated HLA-DR, CD86, CD54, CD16 and CD64 expression. Monocytes with bound PLTs also have an increased capacity for phagocytosis, though not for efferocytosis. In addition, monocytes with bound PLTs have increased IL-10, but not TNF-α, secretion. The altered phenotypic and functional features are comparable in SLE and HD monocytes and in bound PLTs. However, the percentages of monocytes with bound PLTs are significantly higher in SLE patients and are associated with undetectable levels of anti-dsDNA antibodies and hematuria, and with normal C3 and albumin/creatinine levels. Our results suggest that PLTs have a modulatory influence on monocytes and that this effect may be highlighted by an increased binding of PLTs to monocytes in autoimmune conditions.
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Affiliation(s)
- Anaís Mariscal
- Immunology Department, Hospital de la Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain;
| | - Carlos Zamora
- Laboratory of Inflammatory Diseases, Hospital de la Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain; (C.Z.); (M.À.O.)
| | - Berta Magallares
- Rheumatology Department, Hospital de la Santa Creu I Sant Pau, 08041 Barcelona, Spain; (B.M.); (C.D.-T.); (I.C.); (H.C.)
| | | | - Mª Àngels Ortiz
- Laboratory of Inflammatory Diseases, Hospital de la Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain; (C.Z.); (M.À.O.)
| | - Cesar Díaz-Torné
- Rheumatology Department, Hospital de la Santa Creu I Sant Pau, 08041 Barcelona, Spain; (B.M.); (C.D.-T.); (I.C.); (H.C.)
| | - Iván Castellví
- Rheumatology Department, Hospital de la Santa Creu I Sant Pau, 08041 Barcelona, Spain; (B.M.); (C.D.-T.); (I.C.); (H.C.)
| | - Héctor Corominas
- Rheumatology Department, Hospital de la Santa Creu I Sant Pau, 08041 Barcelona, Spain; (B.M.); (C.D.-T.); (I.C.); (H.C.)
| | - Silvia Vidal
- Laboratory of Inflammatory Diseases, Hospital de la Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain; (C.Z.); (M.À.O.)
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14
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Long-term treated HIV infection is associated with platelet mitochondrial dysfunction. Sci Rep 2021; 11:6246. [PMID: 33739024 PMCID: PMC7973809 DOI: 10.1038/s41598-021-85775-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 03/01/2021] [Indexed: 12/31/2022] Open
Abstract
HIV infection and antiretroviral therapy have been linked to mitochondrial dysfunction. The role of platelet mitochondrial dysfunction in thrombosis, immunoregulation and age-related diseases is increasingly appreciated. Here, we studied platelet mitochondrial DNA content (mtDNApl) and mitochondrial function in people living with HIV (PLHIV) and related this to platelet function. In a cohort of 208 treated PLHIV and 56 uninfected controls, mtDNApl was quantified, as well as platelet activation, platelet agonist-induced reactivity and inflammation by circulating factors and flow cytometry. In a subgroup of participants, the metabolic activity of platelets was further studied by mitochondrial function tests and the Seahorse Flux Analyzer. PLHIV had significantly lower mtDNApl compared to controls (8.5 copies/platelet (IQR: 7.0–10.7) vs. 12.2 copies/platelet (IQR: 9.5–16.6); p < 0.001), also after correction for age, sex and BMI. Prior zidovudine-use (n = 46) was associated with a trend for lower mtDNApl. PLHIV also had reduced ex vivo platelet reactivity and mean platelet volume compared to controls. MtDNApl correlated positively with both platelet parameters and correlated negatively with inflammatory marker sCD163. Mitochondrial function tests in a subgroup of participants confirmed the presence of platelet mitochondrial respiration defects. Platelet mitochondrial function is disturbed in PLHIV, which may contribute to platelet dysfunction and subsequent complications. Interventions targeting the preservation of normal platelet mitochondrial function may ultimately prove beneficial for PLHIV.
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15
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Xue Y, Chen H, Zhang S, Bao L, Chen B, Gong H, Zhao Y, Qi R. Resveratrol Confers Vascular Protection by Suppressing TLR4/Syk/NLRP3 Signaling in Oxidized Low-Density Lipoprotein-Activated Platelets. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8819231. [PMID: 33728029 PMCID: PMC7935581 DOI: 10.1155/2021/8819231] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 02/04/2021] [Accepted: 02/11/2021] [Indexed: 12/24/2022]
Abstract
This study investigated the effect of resveratrol on Toll-like receptor 4- (TLR4-) mediated matrix metalloproteinase 3 (MMP3) and MMP9 expression in oxidized low-density lipoprotein- (ox-LDL-) activated platelets and the potential molecule mechanism. Human platelets were used in the present study. The results showed that resveratrol suppressed TLR4, MMP3, and MMP9 expression in ox-LDL-activated platelets. The TLR4 inhibitor CLI-095 also inhibited MMP3 and MMP9 expression and secretion in ox-LDL- and lipopolysaccharide- (LPS-) activated platelets. The combination of resveratrol and CLI-095 synergistically suppressed MMP3 and MMP9 expression in ox-LDL- and LPS-activated platelets. These findings suggest that the resveratrol-induced inhibition of MMP3 and MMP9 expression is linked to the suppression of TLR4 activation. Resveratrol also suppressed spleen tyrosine kinase (Syk) phosphorylation and nucleotide-binding domain leucine-rich repeat containing protein 3 (NLRP3) expression and IL-1β secretion in ox-LDL- and LPS-treated platelets. The coimmunoprecipitation results showed that resveratrol inhibited the binding of Syk and NLRP3. Finally, resveratrol reduced vascular senescence cells and the expression of TLR4, MMP3, and MMP9 and prevented alterations of vascular structure in 52-week-old mice. Our findings demonstrated that resveratrol decreased inflammatory protein expression and improved vascular structure in aged mice. Resveratrol inhibited the expression of TLR4 and secretion of MMP3, MMP9, and IL-1β. The mechanism of action of resveratrol appears to be associated with the inhibition of TLR4/Syk/NLRP3 activation in ox-LDL-activated platelets.
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Affiliation(s)
- Yun Xue
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
- Graduate School of Peking Union Medical College, Beijing, China
| | - Huilian Chen
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Shenghao Zhang
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Li Bao
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Beidong Chen
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Huan Gong
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Yanyang Zhao
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Ruomei Qi
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, China
- Graduate School of Peking Union Medical College, Beijing, China
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16
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Wadowski PP, Weikert C, Pultar J, Lee S, Eichelberger B, Koppensteiner R, Lang IM, Panzer S, Gremmel T. Ticagrelor Inhibits Toll-Like and Protease-Activated Receptor Mediated Platelet Activation in Acute Coronary Syndromes. Cardiovasc Drugs Ther 2020; 34:53-63. [PMID: 32062795 PMCID: PMC7093367 DOI: 10.1007/s10557-019-06932-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Purpose Since ticagrelor inhibits the cellular uptake of adenosine, thereby increasing extracellular adenosine concentration and biological activity, we hypothesized that ticagrelor has adenosine-dependent antiplatelet properties. In the current study, we compared the effects of ticagrelor and prasugrel on platelet activation in acute coronary syndrome (ACS). Methods Platelet surface expression of P-selectin and activated glycoprotein (GP) IIb/IIIa in response to adenosine diphosphate (ADP), the toll-like receptor (TLR)-1/2 agonist Pam3CSK4, the TLR-4 agonist lipopolysaccharide (LPS), the protease-activated receptor (PAR)-1 agonist SFLLRN, and the PAR-4 agonist AYPGKF were measured by flow cytometry in blood from 80 ticagrelor- and 80 prasugrel-treated ACS patients on day 3 after percutaneous coronary intervention. Residual platelet aggregation to arachidonic acid (AA) and ADP were assessed by multiple electrode aggregometry and light transmission aggregometry. Results ADP-induced platelet activation and aggregation, and AA-induced platelet aggregation were similar in patients on ticagrelor and prasugrel, respectively (all p ≥ 0.3). Further, LPS-induced platelet surface expression of P-selectin and activated GPIIb/IIIa did not differ significantly between ticagrelor- and prasugrel-treated patients (both p > 0.4). In contrast, Pam3CSK4-induced platelet surface expression of P-selectin and activated GPIIb/IIIa were significantly lower in ticagrelor-treated patients (both p ≤ 0.005). Moreover, SFLLRN-induced platelet surface expression of P-selectin and activated GPIIb/IIIa were significantly less pronounced in patients on ticagrelor therapy compared to prasugrel-treated patients (both p < 0.03). Finally, PAR-4 mediated platelet activation as assessed by platelet surface expression of activated GPIIb/IIIa following stimulation with AYPGKF was significantly lower in patients receiving ticagrelor (p = 0.02). Conclusion Ticagrelor inhibits TLR-1/2 and PAR mediated platelet activation in ACS patients more strongly than prasugrel.
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Affiliation(s)
- Patricia P Wadowski
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Constantin Weikert
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Joseph Pultar
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Silvia Lee
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Beate Eichelberger
- Department of Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Vienna, Austria
| | - Renate Koppensteiner
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Irene M Lang
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Simon Panzer
- Department of Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Vienna, Austria
| | - Thomas Gremmel
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria.
- Department of Internal Medicine, Cardiology and Nephrology, Landesklinikum Wiener Neustadt, Wiener Neustadt, Austria.
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17
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Revisiting Platelets and Toll-Like Receptors (TLRs): At the Interface of Vascular Immunity and Thrombosis. Int J Mol Sci 2020; 21:ijms21176150. [PMID: 32858930 PMCID: PMC7504402 DOI: 10.3390/ijms21176150] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/19/2020] [Accepted: 08/21/2020] [Indexed: 12/19/2022] Open
Abstract
While platelet function has traditionally been described in the context of maintaining vascular integrity, recent evidence suggests that platelets can modulate inflammation in a much more sophisticated and nuanced manner than previously thought. Some aspects of this expanded repertoire of platelet function are mediated via expression of Toll-like receptors (TLRs). TLRs are a family of pattern recognition receptors that recognize pathogen-associated and damage-associated molecular patterns. Activation of these receptors is crucial for orchestrating and sustaining the inflammatory response to both types of danger signals. The TLR family consists of 10 known receptors, and there is at least some evidence that each of these are expressed on or within human platelets. This review presents the literature on TLR-mediated platelet activation for each of these receptors, and the existing understanding of platelet-TLR immune modulation. This review also highlights unresolved methodological issues that potentially contribute to some of the discrepancies within the literature, and we also suggest several recommendations to overcome these issues. Current understanding of TLR-mediated platelet responses in influenza, sepsis, transfusion-related injury and cardiovascular disease are discussed, and key outstanding research questions are highlighted. In summary, we provide a resource—a “researcher’s toolkit”—for undertaking further research in the field of platelet-TLR biology.
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18
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Ticagrelor Conditioning Effects Are Not Additive to Cardioprotection Induced by Direct NLRP3 Inflammasome Inhibition: Role of RISK, NLRP3, and Redox Cascades. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:9219825. [PMID: 32832010 PMCID: PMC7424511 DOI: 10.1155/2020/9219825] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/07/2020] [Accepted: 06/26/2020] [Indexed: 12/11/2022]
Abstract
Inhibition of either P2Y12 receptor or the nucleotide-binding oligomerization domain- (NOD-) like receptor pyrin domain containing 3 (NLRP3) inflammasome provides cardioprotective effects. Here, we investigate whether direct NLRP3 inflammasome inhibition exerts additive effects on myocardial protection induced by the P2Y12 receptor antagonist Ticagrelor. Ticagrelor (150 mg/kg) was orally administered to rats for three consecutive days. Then, isolated hearts underwent an ischemia/reperfusion (30 min ischemia/60 min reperfusion; IR) protocol. The selective NLRP3 inflammasome inhibitor INF (50 μM) was infused before the IR protocol to the hearts from untreated animals or pretreated with Ticagrelor. In parallel experiments, the hearts isolated from untreated animals were perfused with Ticagrelor (3.70 μM) before ischemia and subjected to IR. The hearts of animals pretreated with Ticagrelor showed a significantly reduced infarct size (IS, 49 ± 3% of area at risk, AAR) when compared to control IR group (69 ± 2% of AAR). Similarly, ex vivo administration of INF before the IR injury resulted in significant IS reduction (38 ± 3% of AAR). Myocardial IR induced the NLRP3 inflammasome complex formation, which was attenuated by either INF pretreatment ex vivo, or by repeated oral treatment with Ticagrelor. The beneficial effects induced by either treatment were associated with the protective Reperfusion Injury Salvage Kinase (RISK) pathway activation and redox defence upregulation. In contrast, no protective effects nor NLRP3/RISK modulation were recorded when Ticagrelor was administered before ischemia in isolated heart, indicating that Ticagrelor direct target is not in the myocardium. Our results confirm that Ticagrelor conditioning effects are likely mediated through platelets, but are not additives to the ones achieved by directly inhibiting NLRP3.
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19
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Circulating MicroRNA Levels Indicate Platelet and Leukocyte Activation in Endotoxemia Despite Platelet P2Y 12 Inhibition. Int J Mol Sci 2020; 21:ijms21082897. [PMID: 32326325 PMCID: PMC7215420 DOI: 10.3390/ijms21082897] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/15/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022] Open
Abstract
There is evidence for the effects of platelet inhibition on innate immune activation. Circulating microRNAs (miRNAs) have been implicated as markers of platelet and leukocyte activation. In the present study, we assessed the effects of P2Y12 inhibitors on platelet and leukocyte miRNAs during endotoxemia. Healthy volunteers were randomly assigned to receive oral ticagrelor (n = 10), clopidogrel (n = 8) or no drug (n = 8) for one week, followed by an intravenous bolus of 2 ng/kg endotoxin. Serum was collected at baseline, after one week of antiplatelet treatment and 6 and 24 h after endotoxin administration. MiRNAs were screened using LNA-based qPCR, followed by TaqMan-qPCR validation of candidates. Clinical validation was performed in 41 sepsis patients. Platelet-enriched miR-197, miR-223 and miR-223* were decreased in volunteers following antiplatelet therapy. Endotoxin increased platelet miRNAs, whilst the opposite effect was seen for leukocyte-enriched miR-150. Neither of these endotoxin-mediated effects were altered by P2Y12 inhibitors. Sepsis patients with fatal outcomes (n = 12) had reduced miR-150 levels compared with survivors (n = 29). In conclusion, we show that miR-150 is downregulated in experimental endotoxemia and can predict survival in sepsis but is unaffected by P2Y12 inhibition. While P2Y12 inhibition reduces platelet-associated miRNAs in healthy volunteers, it fails to attenuate the response of platelet miRNAs to endotoxemia.
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20
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Sanz-Martínez MT, Moga E, Sánchez Martínez MA, Zamora Atenza C, Vidal S, Juárez C, Puig L. High Levels of Platelet-Lymphocyte Complexes in Patients with Psoriasis Are Associated with a Better Response to Anti-TNF-α Therapy. J Invest Dermatol 2019; 140:1176-1183. [PMID: 31778714 DOI: 10.1016/j.jid.2019.08.457] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 08/15/2019] [Accepted: 08/16/2019] [Indexed: 02/06/2023]
Abstract
Psoriasis is currently considered to be an immune-mediated disease whose patho-mechanisms involve platelet activation, which seems to correlate with the activity of the disease. Platelet activation is associated with the formation of platelet-lymphocyte complexes (PLyC), although their significance remains unknown. Moreover, biological treatments that target tumor necrosis factor-α (TNF-α) reduce platelet activation. To clarify the significance of PLyC, we compared their levels in patients with psoriasis with those of healthy donors and determined whether platelet binding modifies the secretion of IL-17A by T helper cells. Finally, we assessed the effect of anti-TNF-α treatment on PLyC in responder and non-responder patients with psoriasis. Ours results demonstrated an increase in PLyC in patients with psoriasis. Moreover, the percentage of IL-17-secreting cells was observed to be higher in the platelet-lymphocyte complex population, and these cells tended to secrete greater amounts of IL-17A. Psoriasis patients treated with anti-TNF-α normalized platelet-lymphocyte complex values, and the basal percentage of platelet-T helper lymphocyte complexes was significantly higher in the responder group. In conclusion, PLyC are increased in psoriasis patients, and the number of complexes decreases in response to anti-TNF-α treatment, specifically in the responder group of patients. This finding suggests that PLyC are a prognostic biomarker of response to anti-TNF-α therapy, but prospective studies are necessary to verify these results in patients with psoriasis.
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Affiliation(s)
| | - Esther Moga
- Department of Immunology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | | | - Carlos Zamora Atenza
- Department of Immunology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Silvia Vidal
- Department of Immunology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Cándido Juárez
- Department of Immunology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Lluís Puig
- Department of Dermatology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
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21
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Dewi IMW, Aleva FE, Kullaya VI, Garishah FM, de Mast Q, van der Ven AJAM, van de Veerdonk FL. Platelets Modulate IFN-γ Production against Candida albicans in Peripheral Blood Mononuclear Cells via Prostaglandins. THE JOURNAL OF IMMUNOLOGY 2019; 204:122-127. [PMID: 31767782 DOI: 10.4049/jimmunol.1900599] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 10/29/2019] [Indexed: 12/23/2022]
Abstract
Platelets are known to have immunomodulatory properties. They modulate immune responses of leukocytes against various pathogens, including fungi. Candida albicans can cause systemic infection in immunocompromised individuals that is associated with a high mortality and morbidity. In the current study, we explored the role of platelets in antifungal host defense against C. albicans PBMCs were stimulated with heat-killed (HK) C. albicans in the presence or absence of isolated washed platelets. Cytokines were quantified from culture supernatants by ELISA. Inhibition of platelet receptors and cytokine pathways were used to elucidate the mechanisms involved in platelet-leukocyte interaction. In the presence of platelets, PBMCs produced less IFN-γ upon stimulation with HK C. albicans This effect was dependent on the direct contact between platelets and leukocytes but was independent of the platelet GPIb and P-selectin receptors. The attenuation of IFN-γ was not a direct effect on T cells but was dependent on the presence of APC and T cells. Platelets did not modulate the Th-1-polarizing cytokines IL-12 and IL-18. The addition of PG (PGE2) further diminished IFN-γ levels in PBMCs, and supplementation of cells with nonsteroidal anti-inflammatory drugs was able to restore the level of IFN-γ. Overall, we show that modulation of the Th1 response against C. albicans by platelets is dependent on PGs.
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Affiliation(s)
- Intan M W Dewi
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands; .,Radboud Centre for Infectious Diseases, Radboudumc, 6525GA Nijmegen, the Netherlands.,Department of Biomedical Sciences, Faculty of Medicine, Universitas Padjadjaran, 40161 Bandung, Indonesia
| | - Floor E Aleva
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands.,Department of Respiratory Medicine, Radboudumc, Nijmegen, the Netherlands; and
| | - Vesla I Kullaya
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands.,Kilimanjaro Clinical Research Institute, Kilimanjaro Christian Medical Centre, Moshi, Tanzania
| | - Fadel M Garishah
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands.,Radboud Centre for Infectious Diseases, Radboudumc, 6525GA Nijmegen, the Netherlands
| | - Quirijn de Mast
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands.,Radboud Centre for Infectious Diseases, Radboudumc, 6525GA Nijmegen, the Netherlands
| | - André J A M van der Ven
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands.,Radboud Centre for Infectious Diseases, Radboudumc, 6525GA Nijmegen, the Netherlands
| | - Frank L van de Veerdonk
- Department of Internal Medicine, Radboudumc, 6525GA Nijmegen, the Netherlands.,Radboud Centre for Infectious Diseases, Radboudumc, 6525GA Nijmegen, the Netherlands
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22
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Riswari SF, Tunjungputri RN, Kullaya V, Garishah FM, Utari GSR, Farhanah N, Overheul GJ, Alisjahbana B, Gasem MH, Urbanus RT, de Groot PG, Lefeber DJ, van Rij RP, van der Ven A, de Mast Q. Desialylation of platelets induced by Von Willebrand Factor is a novel mechanism of platelet clearance in dengue. PLoS Pathog 2019; 15:e1007500. [PMID: 30849118 PMCID: PMC6426266 DOI: 10.1371/journal.ppat.1007500] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 03/20/2019] [Accepted: 12/03/2018] [Indexed: 11/19/2022] Open
Abstract
Thrombocytopenia and platelet dysfunction are commonly observed in patients with dengue virus (DENV) infection and may contribute to complications such as bleeding and plasma leakage. The etiology of dengue-associated thrombocytopenia is multifactorial and includes increased platelet clearance. The binding of the coagulation protein von Willebrand factor (VWF) to the platelet membrane and removal of sialic acid (desialylation) are two well-known mechanisms of platelet clearance, but whether these conditions also contribute to thrombocytopenia in dengue infection is unknown. In two observational cohort studies in Bandung and Jepara, Indonesia, we show that adult patients with dengue not only had higher plasma concentrations of plasma VWF antigen and active VWF, but that circulating platelets had also bound more VWF to their membrane. The amount of platelet-VWF binding correlated well with platelet count. Furthermore, sialic acid levels in dengue patients were significantly reduced as assessed by the binding of Sambucus nigra lectin (SNA) and Maackia amurensis lectin II (MAL-II) to platelets. Sialic acid on the platelet membrane is neuraminidase-labile, but dengue virus has no known neuraminidase activity. Indeed, no detectable activity of neuraminidase was present in plasma of dengue patients and no desialylation was found of plasma transferrin. Platelet sialylation was also not altered by in vitro exposure of platelets to DENV nonstructural protein 1 or cultured DENV. In contrast, induction of binding of VWF to glycoprotein 1b on platelets using the VWF-activating protein ristocetin resulted in the removal of platelet sialic acid by translocation of platelet neuraminidase to the platelet surface. The neuraminidase inhibitor oseltamivir reduced VWF-induced platelet desialylation. Our data demonstrate that excessive binding of VWF to platelets in dengue results in neuraminidase-mediated platelet desialylation and platelet clearance. Oseltamivir might be a novel treatment option for severe thrombocytopenia in dengue infection. Dengue is the most common arbovirus infection in the world. A decrease in the number of blood platelets is an almost universal finding in severe dengue. Binding of the coagulation protein von Willebrand factor (VWF) and loss of sialic acid residues from the platelet membrane are two main mechanisms of clearance of senescent platelets under non-pathological conditions. Here, we show that platelets from patients with acute dengue have bound more VWF and have lost sialic acid from their membrane. Sialic acid can be cleaved by the enzyme neuraminidase. We show that neuraminidase activity in the plasma is not increased and that neither dengue virus itself nor nonstructural protein 1, a protein secreted by dengue virus, cleave sialic acid from the platelet membrane. In contrast, binding of VWF to platelets results in translocation of neuraminidase to the platelet membrane and subsequent cleavage of sialic acid. This process could be inhibited by the neuraminidase inhibitor oseltamivir, a commonly used anti-influenza drug. Altogether, our results indicate that VWF binding to platelets is increased in dengue infection, leading to the removal of sialic acid and platelet clearance. Oseltamivir may prevent this process and thus represent a novel treatment option for low platelet numbers in dengue infection.
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Affiliation(s)
- Silvita Fitri Riswari
- Clinical Infectious Disease Research Center, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Rahajeng N. Tunjungputri
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
- Center for Tropical and Infectious Disease (CENTRID), Faculty of Medicine Diponegoro University, Dr Kariadi Hospital, Semarang, Indonesia
| | - Vesla Kullaya
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
- Kilimanjaro Christian Medical Center, Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | - Fadel M. Garishah
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
- Center for Tropical and Infectious Disease (CENTRID), Faculty of Medicine Diponegoro University, Dr Kariadi Hospital, Semarang, Indonesia
| | - Gloria S. R. Utari
- Center for Tropical and Infectious Disease (CENTRID), Faculty of Medicine Diponegoro University, Dr Kariadi Hospital, Semarang, Indonesia
| | - Nur Farhanah
- Center for Tropical and Infectious Disease (CENTRID), Faculty of Medicine Diponegoro University, Dr Kariadi Hospital, Semarang, Indonesia
| | - Gijs J. Overheul
- Center for Tropical and Infectious Disease (CENTRID), Faculty of Medicine Diponegoro University, Dr Kariadi Hospital, Semarang, Indonesia
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bachti Alisjahbana
- Clinical Infectious Disease Research Center, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
| | - M. Hussein Gasem
- Center for Tropical and Infectious Disease (CENTRID), Faculty of Medicine Diponegoro University, Dr Kariadi Hospital, Semarang, Indonesia
| | - Rolf T. Urbanus
- Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Philip. G. de Groot
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Dirk J. Lefeber
- Department of Neurology, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ronald P. van Rij
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Andre van der Ven
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Quirijn de Mast
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
- * E-mail:
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23
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Jiang Z, Zhang R, Sun M, Liu Q, Wang S, Wang W, Zhao Q, Zhang H, Wang Y, Hou J, Yu B. Effect of Clopidogrel vs Ticagrelor on Platelet Aggregation and Inflammation Markers After Percutaneous Coronary Intervention for ST-Elevation Myocardial Infarction. Can J Cardiol 2018; 34:1606-1612. [DOI: 10.1016/j.cjca.2018.08.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/14/2018] [Accepted: 08/14/2018] [Indexed: 01/19/2023] Open
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24
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Desialylation of Platelets by Pneumococcal Neuraminidase A Induces ADP-Dependent Platelet Hyperreactivity. Infect Immun 2018; 86:IAI.00213-18. [PMID: 30037798 DOI: 10.1128/iai.00213-18] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/13/2018] [Indexed: 11/20/2022] Open
Abstract
Platelets are increasingly recognized to play a role in the complications of Streptococcus pneumoniae infections. S. pneumoniae expresses neuraminidases, which may alter glycans on the platelet surface. In the present study, we investigated the capability of pneumococcal neuraminidase A (NanA) to remove sialic acid (desialylation) from the platelet surface, the consequences for the platelet activation status and reactivity, and the ability of neuraminidase inhibitors to prevent these effects. Our results show that soluble NanA induces platelet desialylation. Whereas desialylation itself did not induce platelet activation (P-selectin expression and platelet fibrinogen binding), platelets became hyperreactive to ex vivo stimulation by ADP and cross-linked collagen-related peptide (CRP-XL). Platelet aggregation with leukocytes also increased. These processes were dependent on the ADP pathway, as inhibitors of the pathway (apyrase and ticagrelor) abrogated platelet hyperreactivity. Inhibition of NanA-induced platelet desialylation by neuraminidase inhibitors (e.g., oseltamivir acid) also prevented the platelet effects of NanA. Collectively, our findings show that soluble NanA can desialylate platelets, leading to platelet hyperreactivity, which can be prevented by neuraminidase inhibitors.
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25
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Hally KE, La Flamme AC, Harding SA, Larsen PD. Platelets regulate leucocyte responses to Toll-like receptor stimulation. Clin Transl Immunology 2018; 7:e1036. [PMID: 30065836 PMCID: PMC6063753 DOI: 10.1002/cti2.1036] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/09/2018] [Accepted: 07/09/2018] [Indexed: 12/15/2022] Open
Abstract
Objectives Platelets are important regulators of vascular thrombosis and inflammation and are known to express Toll-like receptors (TLRs). Through TLRs, platelets mediate a number of responses by interacting with leucocytes. Here, we report the extent to which platelets modulate in vitro peripheral blood mononuclear cells (PBMCs) and granulocyte responses to TLR4, TLR2/1 and TLR2/6 stimulation in healthy subjects. Methods Peripheral blood mononuclear cells and granulocytes from 10 healthy volunteers were cultured alone or cocultured with platelets. Cultures were left unstimulated or stimulated with 1 or 100 ng mL-1 of either LPS (TLR4 agonist), Pam3CSK4 (TLR2/1 agonist) or fibroblast-stimulating lipopeptide (FSL)-1 (TLR2/6 agonist). Neutrophil activation (CD66b expression), monocyte activation (HLA-DR), granulocyte elastase production and PBMC cytokine and chemokine production were examined. Results Platelet coculture decreased neutrophil CD66b expression in response to LPS, Pam3CSK4 and FSL-1, and modestly decreased monocyte HLA-DR expression in response to low-dose LPS. Platelets reduced granulocyte elastase secretion in response to low doses of all TLR agonists tested. In response to LPS, platelet coculture reduced IL-6, tumor necrosis factor (TNF)-α and MIP-1β production, and increased IL-10 production by PBMCs. In response to FSL-1, platelets increased IL-6, IL-10 and MIP-1β production, but reduced TNF-α production. Platelet coculture did not alter PBMC cytokine/chemokine production in response to Pam3CSK4. Conclusion This study challenges the notion that platelets act solely in a pro-inflammatory manner. Rather, platelets are complex immunomodulators that regulate leucocyte responses to TLR stimulation in a TLR agonist-specific manner. Platelets may modulate leucocyte responses to dampen inflammation, and this platelet effect may play an important role in reducing inflammation-mediated host damage.
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Affiliation(s)
- Kathryn E Hally
- School of Biological Sciences Victoria University of Wellington Wellington New Zealand.,Wellington Cardiovascular Research Group Wellington New Zealand
| | - Anne C La Flamme
- School of Biological Sciences Victoria University of Wellington Wellington New Zealand.,Wellington Cardiovascular Research Group Wellington New Zealand
| | - Scott A Harding
- School of Biological Sciences Victoria University of Wellington Wellington New Zealand.,Wellington Cardiovascular Research Group Wellington New Zealand.,Department of Cardiology Wellington Hospital Wellington New Zealand
| | - Peter D Larsen
- School of Biological Sciences Victoria University of Wellington Wellington New Zealand.,Wellington Cardiovascular Research Group Wellington New Zealand.,Department of Surgery and Anaesthesia University of Otago Wellington New Zealand
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26
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Kullaya V, van der Ven A, Mpagama S, Mmbaga BT, de Groot P, Kibiki G, de Mast Q. Platelet-monocyte interaction in Mycobacterium tuberculosis infection. Tuberculosis (Edinb) 2018; 111:86-93. [PMID: 30029921 DOI: 10.1016/j.tube.2018.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/23/2018] [Accepted: 05/06/2018] [Indexed: 02/05/2023]
Abstract
The immune effects of platelets and platelet-leukocyte aggregation are increasingly recognized. We studied the occurrence of platelet-monocyte aggregation (PMA) in patients with pulmonary tuberculosis (TB), the processes underlying PMA and consequences for cytokine responses. In a cross-sectional study involving 65 Tanzanian TB patients in different phases of treatment and 29 healthy controls, TB patients had a significantly higher PMA. This increased PMA in TB patients was associated with increased monocyte CCR5, CD16 expression and PF4, but not with increased membrane-expressed or soluble P-selectin expression. These findings were confirmed in vitro: whereas incubation of whole blood with Mycobacterium tuberculosis (Mtb) did not activate platelets, monocytes became activated with higher CD11b, CD16 and CCR5 expression, but this was independent of platelet-monocyte interaction. Still, platelets had an anti-inflammatory effect on cytokine responses as peripheral blood mononuclear cells (PBMC) incubated with Mtb in the presence of platelets produced less interleukin (IL)-1β, tumor necrosis factor-α, IL-6 and interferon-γ and more IL-10. In conclusion, increased PMA during TB infection is caused by monocyte and not platelet activation. By counteracting the Mtb-induced pro-inflammatory leukocyte response, platelets may protect against excessive tissue damage, but may also compromise the production of protective cytokines, such as IFNƴ and TNFα.
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Affiliation(s)
- Vesla Kullaya
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands; Kilimanjaro Clinical Research Institute, Kilimanjaro Christian Medical Center, Moshi, Tanzania.
| | - Andre van der Ven
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Stellah Mpagama
- Kibong'oto Infectious Diseases Hospital, Kilimanjaro Clinical Research Institute, Sanya Juu, Tanzania
| | - Blandina T Mmbaga
- Kilimanjaro Clinical Research Institute, Kilimanjaro Christian Medical Center, Moshi, Tanzania
| | - Philip de Groot
- Department of Clinical Chemistry and Haematology, University of Utrecht, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Gibson Kibiki
- Kilimanjaro Clinical Research Institute, Kilimanjaro Christian Medical Center, Moshi, Tanzania
| | - Quirijn de Mast
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
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27
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Finsterbusch M, Schrottmaier WC, Kral-Pointner JB, Salzmann M, Assinger A. Measuring and interpreting platelet-leukocyte aggregates. Platelets 2018; 29:677-685. [PMID: 29461910 PMCID: PMC6178087 DOI: 10.1080/09537104.2018.1430358] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Platelets, besides their specialised role in haemostasis and atherothrombosis, actively modulate innate and adaptive immune responses with crucial roles in immune surveillance, inflammation and host defence during infection. An important prerequisite for platelet-mediated changes of immune functions involves direct engagement with different types of leukocytes. Indeed, increased platelet-leukocyte aggregates (PLAs) within the circulation and/or locally at the site of inflammation represent markers of many thrombo-inflammatory diseases, such as cardiovascular diseases, acute lung injury, renal and cerebral inflammation. Therefore, measurement of PLAs could provide an attractive and easily accessible prognostic and/or diagnostic tool for many diseases. To measure PLAs in different (patho-)physiological settings in human and animal models flow cytometric and microscopic approaches have been applied. These techniques represent complementary tools to study different aspects relating to the involvement of leukocyte subtypes and molecules, as well as location of PLAs within tissues, dynamics of their interactions and/or dynamic changes in leukocyte and platelet behaviour. This review summarises various approaches to measure and interpret PLAs and discusses potential experimental factors influencing platelet binding to leukocytes. Furthermore, we summarise insights gained from studies regarding the underlying mechanism of platelet-leukocyte interactions and discuss implications of these interactions in health and disease.
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Affiliation(s)
- Michaela Finsterbusch
- a Department for Vascular Biology and Thrombosis Research , Centre for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
| | - Waltraud C Schrottmaier
- a Department for Vascular Biology and Thrombosis Research , Centre for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
| | - Julia B Kral-Pointner
- a Department for Vascular Biology and Thrombosis Research , Centre for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
| | - Manuel Salzmann
- a Department for Vascular Biology and Thrombosis Research , Centre for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
| | - Alice Assinger
- a Department for Vascular Biology and Thrombosis Research , Centre for Physiology and Pharmacology, Medical University of Vienna , Vienna , Austria
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28
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Müller K, Chatterjee M, Rath D, Geisler T. Platelets, inflammation and anti-inflammatory effects of antiplatelet drugs in ACS and CAD. Thromb Haemost 2017. [DOI: 10.1160/th14-11-0947] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
SummaryPlatelets play a pivotal role in chronic inflammation leading to progression of atherosclerosis and acute coronary events. Recent discoveries on novel mechanisms and platelet-dependent inflammatory targets underpin the role of platelets to maintain a chronic inflammatory condition in cardiovascular disease. There is strong and clinically relevant crosslink between chronic inflammation and platelet activation. Antiplatelet therapy is a cornerstone in the prevention and treatment of acute cardiovascular events. The benefit of antiplatelet agents has mainly been attributed to their direct anti-aggregatory impact. Some anti-inflammatory off-target effects have also been described. However, it is unclear whether these effects are secondary due to inhibition of platelet activation or are caused by direct distinct mechanisms interfering with inflammatory pathways. This article will highlight novel platelet associated targets that contribute to inflammation in cardiovascular disease and elucidate mechanisms by which currently available antiplatelet agents evolve anti-inflammatory capacities, in particular by carving out the differential mechanisms directly or indirectly affecting platelet mediated inflammation. It will further illustrate the prognostic impact of antiplatelet therapies by reducing inflammatory marker release in recent cardiovascular trials.
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29
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Kullaya VI, de Mast Q, van der Ven A, elMoussaoui H, Kibiki G, Simonetti E, de Jonge MI, Ferwerda G. Platelets Modulate Innate Immune Response Against Human Respiratory Syncytial Virus In Vitro. Viral Immunol 2017; 30:576-581. [PMID: 28783457 DOI: 10.1089/vim.2016.0161] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Detection of respiratory syncytial virus (RSV) in blood, including mononuclear leukocytes and organs other than the lung, suggests that RSV disseminates outside the respiratory tract. In this study, the role of platelets in host defense against RSV was explored using an in vitro model. Platelets, also produced in the lungs, are increasingly recognized as an important part of host immune responses and may therefore play a role in modulating lung infections and clearing RSV viremia. In human peripheral blood mononuclear cells (PBMCs), platelets significantly reduced RSV infection of monocytes, monocyte activation, and interferon (IFN)α/γ production. Direct contact of platelets with PBMCs modulated the immune response when stimulated with Poly I:C (TLR3) and R848 (TLR7/8), Toll-like receptors (TLRs) involved in the recognition of RSV, and led to an enhanced IFNα/γ production. This suggested that reduction in RSV infection of monocytes in the presence of platelets could be IFN dependent; blocking IFNα receptor 2 (IFNAR2) on PBMCs indeed increased RSV infection. In addition, IFNs were not detected when PBMCs were stimulated with inactivated RSV, indicating that infection of monocytes was important for the induction of IFN responses and that the platelet-mediated reduced RSV infection was responsible for the decreased IFN levels. Furthermore, platelets could internalize RSV reducing the amount of viral particles that could infect monocytes. Our findings suggest that platelets may play a role in the clearance of RSV viremia by internalizing viral particles and by enhancing type I IFN production from PBMCs, which subsequently exert antiviral effect on host cells.
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Affiliation(s)
- Vesla I Kullaya
- 1 Department of Internal Medicine, Radboud University Medical Center , Nijmegen, the Netherlands .,2 Kilimanjaro Clinical Research Institute , Kilimanjaro Christian Medical Center, Moshi, Tanzania
| | - Quirijn de Mast
- 1 Department of Internal Medicine, Radboud University Medical Center , Nijmegen, the Netherlands
| | - Andre van der Ven
- 1 Department of Internal Medicine, Radboud University Medical Center , Nijmegen, the Netherlands
| | - Hicham elMoussaoui
- 3 Laboratory of Pediatric Infectious Diseases, Department of Pediatrics, Radboud University Medical Center , Radboud Center for Infectious Diseases, Nijmegen, the Netherlands
| | - Gibson Kibiki
- 2 Kilimanjaro Clinical Research Institute , Kilimanjaro Christian Medical Center, Moshi, Tanzania
| | - Elles Simonetti
- 3 Laboratory of Pediatric Infectious Diseases, Department of Pediatrics, Radboud University Medical Center , Radboud Center for Infectious Diseases, Nijmegen, the Netherlands
| | - Marien I de Jonge
- 3 Laboratory of Pediatric Infectious Diseases, Department of Pediatrics, Radboud University Medical Center , Radboud Center for Infectious Diseases, Nijmegen, the Netherlands
| | - Gerben Ferwerda
- 3 Laboratory of Pediatric Infectious Diseases, Department of Pediatrics, Radboud University Medical Center , Radboud Center for Infectious Diseases, Nijmegen, the Netherlands
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30
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Kiers D, van der Heijden WA, van Ede L, Gerretsen J, de Mast Q, van der Ven AJ, El Messaoudi S, Rongen GA, Gomes M, Kox M, Pickkers P, Riksen NP. A randomised trial on the effect of anti-platelet therapy on the systemic inflammatory response in human endotoxaemia. Thromb Haemost 2017; 117:1798-1807. [PMID: 28692111 DOI: 10.1160/th16-10-0799] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 05/25/2017] [Indexed: 01/09/2023]
Abstract
The use of acetylsalicylic acid (ASA) is associated with improved outcome in patients with sepsis, and P2Y12 inhibitors have been suggested to also have immunomodulatory effects. Therefore, we evaluated the effects of clinically relevant combinations of antiplatelet therapy on the immune response in experimental endotoxaemia in humans in vivo. Forty healthy subjects were randomised to seven days of placebo, placebo with ASA, ticagrelor and ASA, or clopidogrel and ASA treatment. Systemic inflammation was elicited at day seven by intravenous administration of Escherichia coli endotoxin. ASA treatment profoundly augmented the plasma concentration of pro-inflammatory cytokines, but did not affect anti-inflammatory cytokines. Addition of either P2Y12 antagonist to ASA did not affect any of the circulating cytokines, except for an attenuation of the ASA-induced increase in TNFα by ticagrelor. Systemic inflammation increased plasma adenosine, without differences between groups, and although P2Y12 inhibition impaired platelet reactivity, there was no correlation with cytokine responses.
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Affiliation(s)
- Dorien Kiers
- Prof. N. P. Riksen, Dept. of Internal Medicine 463, Radboud University Medical Center, PO Box 9101, 6500HB Nijmegen, The Netherlands, Tel.: +31 24 3618819, Fax: +31 24 3616519, E-mail:
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31
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Bekő K, Koványi B, Gölöncsér F, Horváth G, Dénes Á, Környei Z, Botz B, Helyes Z, Müller CE, Sperlágh B. Contribution of platelet P2Y 12 receptors to chronic Complete Freund's adjuvant-induced inflammatory pain. J Thromb Haemost 2017; 15:1223-1235. [PMID: 28345287 DOI: 10.1111/jth.13684] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Indexed: 11/30/2022]
Abstract
Essentials The role of platelet P2Y12 receptors in the regulation of chronic inflammatory pain is unknown. Complete Freund's Adjuvant (CFA)-induced chronic inflammatory pain model was used in mice. Gene deficiency and antagonists of P2Y12 receptors attenuate hyperalgesia and local inflammation. Platelet P2Y12 receptors contribute to these effects in the chronic phase of inflammation. SUMMARY Background P2Y12 receptor antagonists are widely used in clinical practice to inhibit platelet aggregation. P2Y12 receptors are also known to regulate different forms of pain as well as local and systemic inflammation. However, it is not known whether platelet P2Y12 receptors contribute to these effects. Objectives To explore the contribution of platelet P2Y12 receptors to chronic inflammatory pain in mice. Methods Complete Freund's adjuvant (CFA)-induced chronic inflammatory pain was induced in wild-type and P2ry12 gene-deficient (P2ry12-/- ) mice, and the potent, direct-acting and reversible P2Y12 receptor antagonists PSB-0739 and cangrelor were used. Results CFA-induced mechanical hyperalgesia was significantly decreased in P2ry12-/- mice for up to 14 days, and increased neutrophil myeloperoxidase activity and tumor necrosis factor (TNF)-α and CXCL1 (KC) levels in the hind paws were also attenuated in the acute inflammation phase. At day 14, increased interleukin (IL)-1β, IL-6, TNF-α and KC levels were attenuated in P2ry12-/- mice. PSB-0739 and cangrelor reversed hyperalgesia in wild-type mice but had no effect in P2ry12-/- mice, and PSB-0739 was also effective when applied locally. The effects of both local and systemic PSB-0739 were prevented by A-803467, a selective NaV1.8 channel antagonist, suggesting the involvement of NaV1.8 channels in the antihyperalgesic effect. Platelet depletion by anti-mouse CD41 antibody decreased hyperalgesia and attenuated the proinflammatory cytokine response in wild-type but not in P2ry12-/- mice on day 14. Conclusions In conclusion, P2Y12 receptors regulate CFA-induced hyperalgesia and the local inflammatory response, and platelet P2Y12 receptors contribute to these effects in the chronic inflammation phase.
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Affiliation(s)
- K Bekő
- Laboratory of Molecular Pharmacology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
- János Szentágothai School of Neurosciences, Semmelweis University School of PhD Studies, Budapest, Hungary
| | - B Koványi
- Laboratory of Molecular Pharmacology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
- János Szentágothai School of Neurosciences, Semmelweis University School of PhD Studies, Budapest, Hungary
| | - F Gölöncsér
- Laboratory of Molecular Pharmacology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
- János Szentágothai School of Neurosciences, Semmelweis University School of PhD Studies, Budapest, Hungary
| | - G Horváth
- Laboratory of Molecular Pharmacology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
- János Szentágothai School of Neurosciences, Semmelweis University School of PhD Studies, Budapest, Hungary
| | - Á Dénes
- Laboratory of Neuroimmunology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - Z Környei
- Laboratory of Neuroimmunology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - B Botz
- Department of Pharmacology and Pharmacotherapy, Center for Neuroscience, and Molecular Pharmacology, Research Team, János Szentágothai Research Center, University of Pécs, University of Pécs Medical School, Pécs, Hungary
| | - Z Helyes
- Department of Pharmacology and Pharmacotherapy, Center for Neuroscience, and Molecular Pharmacology, Research Team, János Szentágothai Research Center, University of Pécs, University of Pécs Medical School, Pécs, Hungary
- MTA-PTE NAP B Chronic Pain Research Group, University of Pécs, Pécs, Hungary
| | - C E Müller
- Pharmaceutical Institute, PharmaCenter Bonn, University of Bonn, Bonn, Germany
| | - B Sperlágh
- Laboratory of Molecular Pharmacology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
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Zamora C, Cantó E, Nieto JC, Bardina J, Diaz-Torné C, Moya P, Magallares B, Ortiz MA, Julià G, Juarez C, Llobet JM, Vidal S. Binding of Platelets to Lymphocytes: A Potential Anti-Inflammatory Therapy in Rheumatoid Arthritis. THE JOURNAL OF IMMUNOLOGY 2017; 198:3099-3108. [PMID: 28250158 DOI: 10.4049/jimmunol.1601708] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 02/03/2017] [Indexed: 12/15/2022]
Abstract
Soluble factors released from platelets can modulate the immune response of leukocytes. We and others have recently found that T lymphocytes with bound platelets have reduced proliferation and IFN-γ and IL-17 production. Thus, we speculate that if we induce the binding of platelets to lymphocytes, we will be able to regulate the inflammatory response. When we cocultured platelets with lymphocytes at different ratios, we were able to increase the percentage of lymphocytes with bound platelets. The coculture of platelets with lymphocytes in the presence of stimulation decreased the production of IFN-γ and TNF-α, T cell proliferation, and the expression of CD25, PD-L1, and SLAM. However, this coculture increased CD39 expression. All of these effects were dependent on the dose of platelets and operated indistinctly with platelets from different healthy donors. When platelets were cocultured in the same compartment with lymphocytes, we observed less IFN-γ and TNF-α production and T lymphocyte proliferation than in cultures with platelets separated from lymphocytes by a 0.4-μm pore size filter. The binding of platelets to lymphocytes was blocked with anti-P-selectin Abs, and when this occurred we observed higher IFN-γ and TNF-α production than in nonblocked conditions. The cocultures of platelets with synovial fluid cells from rheumatoid arthritis patients reduced inflammatory cytokine production and increased IL-10 production. These results suggest that platelet binding to lymphocytes effectively regulates T lymphocyte function. This mechanism could be easily applied to reduce inflammatory responses.
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Affiliation(s)
- Carlos Zamora
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain;
| | - Elisabet Cantó
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - Juan C Nieto
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - Jorge Bardina
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - Cesar Diaz-Torné
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain.,Unitat Reumatologia, Hospital de la Santa Creu i Sant Pau, 08026 Barcelona, Spain; and
| | - Patricia Moya
- Unitat Reumatologia, Hospital de la Santa Creu i Sant Pau, 08026 Barcelona, Spain; and
| | - Berta Magallares
- Unitat Reumatologia, Hospital de la Santa Creu i Sant Pau, 08026 Barcelona, Spain; and
| | - M Angels Ortiz
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - Germà Julià
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - Candido Juarez
- Departament Immunologia, Hospital de la Santa Creu i Sant Pau, 08026 Barcelona, Spain
| | - Josep M Llobet
- Unitat Reumatologia, Hospital de la Santa Creu i Sant Pau, 08026 Barcelona, Spain; and
| | - Silvia Vidal
- Departament Immunologia, Institut Recerca Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain;
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Damien P, Cognasse F, Payrastre B, Spinelli SL, Blumberg N, Arthaud CA, Eyraud MA, Phipps RP, McNicol A, Pozzetto B, Garraud O, Hamzeh-Cognasse H. NF-κB Links TLR2 and PAR1 to Soluble Immunomodulator Factor Secretion in Human Platelets. Front Immunol 2017; 8:85. [PMID: 28220122 PMCID: PMC5292648 DOI: 10.3389/fimmu.2017.00085] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 01/18/2017] [Indexed: 12/13/2022] Open
Abstract
The primary toll-like receptor (TLR)-mediated immune cell response pathway common for all TLRs is MyD88-dependent activation of NF-κB, a seminal transcription factor for many chemokines and cytokines. Remarkably, anucleate platelets express the NF-κB machinery, whose role in platelets remains poorly understood. Here, we investigated the contribution of NF-κB in the release of cytokines and serotonin by human platelets, following selective stimulation of TLR2 and protease activated receptor 1 (PAR1), a classical and non-classical pattern-recognition receptor, respectively, able to participate to the innate immune system. We discovered that platelet PAR1 activation drives the process of NF-κB phosphorylation, in contrast to TLR2 activation, which induces a slower phosphorylation process. Conversely, platelet PAR1 and TLR2 activation induces similar ERK1/2, p38, and AKT phosphorylation. Moreover, we found that engagement of platelet TLR2 with its ligand, Pam3CSK4, significantly increases the release of sCD62P, RANTES, and sCD40L; this effect was attenuated by incubating platelets with a blocking anti-TLR2 antibody. This effect appeared selective since no modulation of serotonin secretion was observed following platelet TLR2 activation. Platelet release of sCD62P, RANTES, and sCD40L following TLR2 or PAR1 triggering was abolished in the presence of the NF-κB inhibitor Bay11-7082, while serotonin release following PAR1 activation was significantly decreased. These new findings support the concept that NF-κB is an important player in platelet immunoregulations and functions.
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Affiliation(s)
- Pauline Damien
- GIMAP-EA3064, Université de Lyon , Saint-Étienne , France
| | - Fabrice Cognasse
- GIMAP-EA3064, Université de Lyon, Saint-Étienne, France; Etablissement Français du Sang Rhône-Alpes-Auvergne, Saint-Etienne, France
| | - Bernard Payrastre
- Inserm, U1048 and Université Toulouse 3, I2MC, CHU de Toulouse, Laboratoire d'Hématologie , Toulouse , France
| | - Sherry L Spinelli
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | - Neil Blumberg
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | | | - Marie-Ange Eyraud
- Etablissement Français du Sang Rhône-Alpes-Auvergne , Saint-Etienne , France
| | - Richard P Phipps
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | | | - Bruno Pozzetto
- GIMAP-EA3064, Université de Lyon , Saint-Étienne , France
| | - Olivier Garraud
- GIMAP-EA3064, Université de Lyon, Saint-Étienne, France; Institut National de Transfusion Sanguine (INTS), Paris, France
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Tunjungputri RN, Peters E, van der Ven A, de Groot PG, de Mast Q, Pickkers P. Human recombinant alkaline phosphatase inhibits ex vivo platelet activation in humans. Thromb Haemost 2016; 116:1111-1121. [PMID: 27656709 DOI: 10.1160/th16-03-0206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 09/07/2016] [Indexed: 12/15/2022]
Abstract
Sepsis-associated acute kidney injury (AKI) is associated with high morbidity and mortality. Excessive platelet activation contributes to AKI through the formation of microthrombi and amplification of systemic inflammation. Two phase II trials demonstrated that bovine-intestinal alkaline phosphatase (AP) improved renal function in critically ill patients with sepsis-associated AKI. In this study, we characterised the platelet-inhibiting effects of a human recombinant AP. Whole blood and platelet-rich plasma (PRP) of healthy volunteers (n=6) was pre-treated ex vivo with recAP, whereafter platelet reactivity to ADP, collagen-related peptide (CRP-XL) and Pam3CSK4 was determined by flow cytometry. RecAP (40 U/ml) reduced the platelet reactivity to ADP (inhibition with a median of 47 %, interquartile range 43-49 %; p<0.001) and tended to reduce platelet reactivity to CRP-XL (9 %, 2-25 %; p=0.08) in whole blood. The platelet-inhibiting effects of recAP were more pronounced in PRP both for ADP- (64 %, 54-68 %; p=0.002) and CRP-XL-stimulated samples (60 %, 46-71 %; p=0.002). RecAP rapidly converted ADP into adenosine, whereas antagonism of the A2A adenosine receptor partially reversed the platelet inhibitory effects of recAP. Platelets of septic shock patients (n=5) showed a 31% (22-34%; p=0.03) more pronounced reactivity compared to healthy volunteers, and this was completely reversed by recAP treatment. In conclusion, we demonstrate that recAP inhibits ex vivo human platelet activation through dephosphorylation of ADP and formation of adenosine as its turnover product. RecAP is able to reverse the platelet hyperreactivity present in septic shock patients. These effects may contribute to the beneficial effects of recAP as a new therapeutic candidate for sepsis-associated AKI.
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Affiliation(s)
| | | | | | | | | | - Peter Pickkers
- Peter Pickkers, Department of Intensive Care Medicine, Radboud university medical center, PO Box 9101, Internal Mailbag 710, 6500 HB Nijmegen, The Netherlands, Tel.: +31 24 36 15363, Fax: +31 24 36 68058, E-mail:
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35
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Kral JB, Schrottmaier WC, Salzmann M, Assinger A. Platelet Interaction with Innate Immune Cells. Transfus Med Hemother 2016; 43:78-88. [PMID: 27226790 DOI: 10.1159/000444807] [Citation(s) in RCA: 166] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 02/07/2016] [Indexed: 12/11/2022] Open
Abstract
Beyond their traditional role in haemostasis and thrombosis, platelets are increasingly recognised as immune modulatory cells. Activated platelets and platelet-derived microparticles can bind to leukocytes, which stimulates mutual activation and results in rapid, local release of platelet-derived cytokines. Thereby platelets modulate leukocyte effector functions and contribute to inflammatory and immune responses to injury or infection. Platelets enhance leukocyte extravasation, differentiation and cytokine release. Platelet-neutrophil interactions boost oxidative burst, neutrophil extracellular trap formation and phagocytosis and play an important role in host defence. Platelet interactions with monocytes propagate their differentiation into macrophages, modulate cytokine release and attenuate macrophage functions. Depending on the underlying pathology, platelets can enhance or diminish leukocyte cytokine production, indicating that platelet-leukocyte interactions represent a fine balanced system to restrict excessive inflammation during infection. In atherosclerosis, platelet interaction with neutrophils, monocytes and dendritic cells accelerates key steps of atherogenesis by promoting leukocyte extravasation and foam cell formation. Platelet-leukocyte interactions at sites of atherosclerotic lesions destabilise atherosclerotic plaques and promote plaque rupture. Leukocytes in turn also modulate platelet function and production, which either results in enhanced platelet destruction or increased platelet production. This review aims to summarise the key effects of platelet-leukocyte interactions in inflammation, infection and atherosclerosis.
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Affiliation(s)
- Julia Barbara Kral
- Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | | | - Manuel Salzmann
- Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Alice Assinger
- Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
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36
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Platelet microparticles inhibit IL-17 production by regulatory T cells through P-selectin. Blood 2016; 127:1976-86. [PMID: 26903549 DOI: 10.1182/blood-2015-04-640300] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 02/09/2016] [Indexed: 12/22/2022] Open
Abstract
Self-tolerance and immune homeostasis are orchestrated by FOXP3(+)regulatory T cells (Tregs). Recent data have revealed that upon stimulation, Tregs may exhibit plasticity toward a proinflammatory phenotype, producing interleukin 17 (IL-17) and/or interferon γ (IFN-γ). Such deregulation of Tregs may contribute to the perpetuation of inflammatory processes, including graft-versus-host disease. Thus, it is important to identify immunomodulatory factors influencing Treg stability. Platelet-derived microparticles (PMPs) are involved in hemostasis and vascular health and have recently been shown to be intimately involved in (pathogenic) immune responses. Therefore, we investigated whether PMPs have the ability to affect Treg plasticity. PMPs were cocultured with healthy donor peripheral blood-derived Tregs that were stimulated with anti-CD3/CD28 monoclonal antibodies in the presence of IL-2, IL-15, and IL-1β. PMPs prevented the differentiation of peripheral blood-derived Tregs into IL-17- and IFN-γ-producing cells, even in the presence of the IL-17-driving proinflammatory cytokine IL-1β. The mechanism of action by which PMPs prevent Treg plasticity consisted of rapid and selective P-selectin-dependent binding of PMPs to a CCR6(+)HLA-DR(+)memory-like Treg subset and their ability to inhibit Treg proliferation, in part through CXCR3 engagement. The findings that ~8% of Tregs in the circulation of healthy individuals are CD41(+)P-selectin(+)and that distinct binding of patient plasma PMPs to Tregs was observed support in vivo relevance. These findings open the exciting possibility that PMPs actively regulate the immune response at sites of (vascular) inflammation, where they are known to accumulate and interact with leukocytes, consolidating the (vascular) healing process.
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37
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Potent irreversible P2Y12 inhibition does not reduce LPS-induced coagulation activation in a randomized, double-blind, placebo-controlled trial. Clin Sci (Lond) 2016; 130:433-40. [DOI: 10.1042/cs20150591] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 11/09/2015] [Indexed: 02/07/2023]
Abstract
Intake of prasugrel, a strong P2Y12 receptor inhibitor, does not affect LPS-induced activation of coagulation. Sterile inflammation by LPS increases histone-complexed DNA, a surrogate parameter of neutrophil extracellular trap formation.
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