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He F, Laranjeira AB, Kong T, Lin S, Ashworth KJ, Liu A, Lasky NM, Fisher DA, Cox MJ, Fulbright MC, Antunes-Heck L, Yu L, Brakhane M, Gao B, Sykes SM, D’Alessandro A, Di Paola J, Oh ST. Multiomic profiling reveals metabolic alterations mediating aberrant platelet activity and inflammation in myeloproliferative neoplasms. J Clin Invest 2024; 134:e172256. [PMID: 38060311 PMCID: PMC10836808 DOI: 10.1172/jci172256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 12/06/2023] [Indexed: 02/02/2024] Open
Abstract
Platelets from patients with myeloproliferative neoplasms (MPNs) exhibit a hyperreactive phenotype. Here, we found elevated P-selectin exposure and platelet-leukocyte aggregates indicating activation of platelets from essential thrombocythemia (ET) patients. Single-cell RNA-seq analysis of primary samples revealed significant enrichment of transcripts related to platelet activation, mTOR, and oxidative phosphorylation in ET patient platelets. These observations were validated via proteomic profiling. Platelet metabolomics revealed distinct metabolic phenotypes consisting of elevated ATP generation accompanied by increases in the levels of multiple intermediates of the tricarboxylic acid cycle, but lower α-ketoglutarate (α-KG) in MPN patients. Inhibition of PI3K/AKT/mTOR signaling significantly reduced metabolic responses and hyperreactivity in MPN patient platelets, while α-KG supplementation markedly reduced oxygen consumption and ATP generation. Ex vivo incubation of platelets from both MPN patients and Jak2 V617F-knockin mice with α-KG supplementation significantly reduced platelet activation responses. Oral α-KG supplementation of Jak2 V617F mice decreased splenomegaly and reduced hematocrit, monocyte, and platelet counts. Finally, α-KG treatment significantly decreased proinflammatory cytokine secretion from MPN CD14+ monocytes. Our results reveal a previously unrecognized metabolic disorder in conjunction with aberrant PI3K/AKT/mTOR signaling that contributes to platelet hyperreactivity in MPN patients.
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Affiliation(s)
- Fan He
- Division of Hematology, Department of Medicine, and
| | | | - Tim Kong
- Division of Hematology, Department of Medicine, and
| | - Shuyang Lin
- Division of Hematology, Department of Medicine, and
| | - Katrina J. Ashworth
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Alice Liu
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Nina M. Lasky
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | | | | | | | - Lilian Antunes-Heck
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - LaYow Yu
- Division of Hematology, Department of Medicine, and
| | | | - Bei Gao
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Stephen M. Sykes
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Angelo D’Alessandro
- Department of Biochemistry and Molecular Genetics, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA
| | - Jorge Di Paola
- Division of Hematology & Oncology, Department of Pediatrics, School of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Stephen T. Oh
- Division of Hematology, Department of Medicine, and
- Immunomonitoring Laboratory, Center for Human Immunology and Immunotherapy Programs, and
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
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2
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Esparza O, Hernandez G, Rojas-Sanchez G, Calzada-Martinez J, Nemkov T, Kelher M, Kelly K, Silliman CC, DomBourian M, Dumont LJ, D’Alessandro A, Davizon-Castillo P. Platelets from blood diversion pouches (DPs) are a suitable alternative for functional, bioenergetic, and metabolomic analyses. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2023; 21:BloodTransfus.519. [PMID: 37235734 PMCID: PMC10645348 DOI: 10.2450/bloodtransfus.519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 03/15/2023] [Indexed: 05/28/2023]
Abstract
BACKGROUND The collection of the first blood flow into a diversion pouch (DP) has become widely adopted in blood donation systems to reduce whole-blood unit contamination from skin bacteria. The strict control of pre-analytical variables, such as blood collection and proper anticoagulant selection, is critical to diminish experimental variability when studying different aspects of platelet biology. We hypothesize that the functional, mitochondrial, and metabolomic profiles of platelets isolated from the DP are not different from the ones isolated from standard venipuncture (VP), thus representing a suitable collection method of platelets for experimental purposes. MATERIALS AND METHODS Whole blood from the blood DP or VP was collected. Platelets were subsequently isolated and washed following standard protocols. Platelet function was assessed by flow cytometry, light transmission aggregometry, clot retraction, and under flow conditions using the total thrombus formation analyzer (T-TAS). Mitochondrial function and the platelet metabolome profiles were determined by the Seahorse extracellular flux analyzer (Agilent, Santa Clara, CA, USA) and ultra-high-pressure liquid chromatography-mass spectrometry metabolomics, respectively. RESULTS Platelets isolated from VP and the DP have similar functional, mitochondrial, and metabolic profiles with no significant differences between both groups at baseline and upon activation by any of the assays mentioned above. DISCUSSION The findings of our study support the use of platelets from the DP for performing functional and metabolic studies on platelets from a wide range of blood donors. The DP may serve as an alternative blood collection method to standard VP, allowing the study of diverse aspects of platelet biology, such as age, sex, race, and ethnicity, in many eligible individuals for blood donation.
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Affiliation(s)
- Orlando Esparza
- Department of Pediatrics Hematology/ Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Giovanny Hernandez
- Department of Pediatrics Hematology/ Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Guadalupe Rojas-Sanchez
- Department of Pediatrics Hematology/ Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Jorge Calzada-Martinez
- Department of Pediatrics Hematology/ Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Travis Nemkov
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Marguerite Kelher
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Kathleen Kelly
- Department of Pathology, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Christopher C. Silliman
- Department of Pediatrics Hematology/ Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
- Vitalant Research Institute, Denver CO, United States of America
| | - Melkon DomBourian
- Department of Pathology, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Larry J. Dumont
- Vitalant Research Institute, Denver CO, United States of America
| | - Angelo D’Alessandro
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
| | - Pavel Davizon-Castillo
- Department of Pediatrics Hematology/ Oncology and Bone Marrow Transplantation, University of Colorado Anschutz Medical Campus, Aurora CO, United States of America
- Hemophilia and Thrombosis Center, University of Colorado School of Medicine, Aurora CO, United States of America
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3
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Yuan H, Liu Y, Zhang J, Dong JF, Zhao Z. Transcription factors in megakaryocytes and platelets. Front Immunol 2023; 14:1140501. [PMID: 36969155 PMCID: PMC10034027 DOI: 10.3389/fimmu.2023.1140501] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/01/2023] [Indexed: 03/11/2023] Open
Abstract
Transcription factors bind promoter or regulatory sequences of a gene to regulate its rate of transcription. However, they are also detected in anucleated platelets. The transcription factors RUNX1, GATA1, STAT3, NFκB, and PPAR have been widely reported to play key roles in the pathophysiology of platelet hyper-reactivity, thrombosis, and atherosclerosis. These non-transcriptional activities are independent of gene transcription or protein synthesis but their underlying mechanisms of action remain poorly defined. Genetic and acquired defects in these transcription factors are associated with the production of platelet microvesicles that are known to initiate and propagate coagulation and to promote thrombosis. In this review, we summarize recent developments in the study of transcription factors in platelet generation, reactivity, and production of microvesicles, with a focus on non-transcriptional activities of selected transcription factors.
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Affiliation(s)
- Hengjie Yuan
- Tianjin Institute of Neurology, Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- BloodWorks Research Institute, Seattle, WA, United States
| | - Yafan Liu
- Tianjin Institute of Neurology, Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Jianning Zhang
- Tianjin Institute of Neurology, Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Jing-fei Dong
- BloodWorks Research Institute, Seattle, WA, United States
- Division of Hematology, Department of Medicine, University of Washington, School of Medicine, Seattle, WA, United States
- *Correspondence: Zilong Zhao, ; Jing-fei Dong,
| | - Zilong Zhao
- Tianjin Institute of Neurology, Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- BloodWorks Research Institute, Seattle, WA, United States
- *Correspondence: Zilong Zhao, ; Jing-fei Dong,
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4
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Lee DH, Kwak HJ, Shin Y, Kim SJ, Lee GH, Park IH, Kim SH, Kang KS. Elucidation of Phytochemicals Affecting Platelet Responsiveness in Dangguisu-san: Active Ingredient Prediction and Experimental Research Using Network Pharmacology. PLANTS (BASEL, SWITZERLAND) 2023; 12:1120. [PMID: 36903980 PMCID: PMC10005453 DOI: 10.3390/plants12051120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/13/2023] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
Plant-derived phytochemicals are emerging as novel agents for protection against chronic disorders. Dangguisu-san is a herbal prescription to invigorate the blood and relieve pain. Among the numerous active constituents of Dangguisu-san, those expected to be effective at inhibiting platelet aggregation were predicted using a network pharmacological method, and their efficacy was experimentally demonstrated. All four identified chemical components, namely chrysoeriol, apigenin, luteolin, and sappanchalcone, suppressed the aggregation of platelets to a certain extent. However, we report, for the first time, that chrysoeriol acts as a strong inhibitor of platelet aggregation. Although additional in vivo studies are needed, among the complex constituents of herbal medicines, the components that exert an inhibitory effect on platelet aggregation were predicted using a network pharmacological method and experimentally confirmed with human platelets.
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Affiliation(s)
- Dong-Ha Lee
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan 31020, Republic of Korea
| | - Hee Jae Kwak
- College of Pharmacy, Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon 21983, Republic of Korea
| | - Yonghee Shin
- College of Korean Medicine, Gachon University, Seongnam 13120, Republic of Korea
| | - Sung Jin Kim
- College of Korean Medicine, Gachon University, Seongnam 13120, Republic of Korea
| | - Ga Hee Lee
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan 31020, Republic of Korea
| | - Il-Ho Park
- College of Pharmacy, Sahmyook University, Seoul 01795, Republic of Korea
| | - Seung Hyun Kim
- College of Pharmacy, Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon 21983, Republic of Korea
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University, Seongnam 13120, Republic of Korea
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5
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Legrand M, Jourdan ML, de Pinieux G. Histopathogenesis of bone- and soft-tissue tumor spectrum with USP6 gene rearrangement: multiple partners involved in the tissue repair process. Histol Histopathol 2023; 38:247-260. [PMID: 36205240 DOI: 10.14670/hh-18-532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Primary aneurysmal bone cyst, nodular fasciitis, myositis ossificans and related lesions as well as fibroma of tendon sheath are benign tumors that share common histological features and a chromosomal rearrangement involving the ubiquitin-specific peptidase 6 (USP6) gene. The tumorigenesis of this tumor spectrum has become complex with the identification of an increasing number of new partners involved in USP6 rearrangements. Because traumatic involvement has long been mentioned in the histogenesis of most lesions in the USP6 spectrum and they morphologically resemble granulation tissue or callus, we attempted to shed light on the function and role USP6 partners play in tissue remodelling and the repair process and, to a lesser extent, bone metabolism.
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Affiliation(s)
- Mélanie Legrand
- University Hospital of Tours, Department of Pathology, Tours, France
| | - Marie-Lise Jourdan
- University Hospital of Tours, Platform of Molecular Genetics, Tours, France
| | - Gonzague de Pinieux
- University Hospital of Tours, Department of Pathology, Tours, France.,University of Tours, Tours, France.
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6
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Fang L, Yu S, Tian X, Fu W, Su L, Chen Z, Yan C, He J, Hong J, Lian W, Liu G, Zhang Y, Zhou J, Hu L. Severe fever with thrombocytopenia syndrome virus replicates in platelets and enhances platelet activation. J Thromb Haemost 2023; 21:1336-1351. [PMID: 36792011 DOI: 10.1016/j.jtha.2023.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 02/06/2023] [Accepted: 02/07/2023] [Indexed: 02/15/2023]
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) virus (SFTSV) infection causes an emerging hemorrhagic fever in East Asia with a high mortality rate. Thrombocytopenia is a consistent feature of SFTS illness, but the mechanism remains elusive. OBJECTIVES We aimed to better understand the role of platelets in the pathophysiology of SFTSV infection, including the development of thrombocytopenia. METHODS Using platelets from healthy volunteers and patients with SFTS, we evaluated the functional changes in platelets against SFTSV infection. We investigated the direct effect of glycoprotein VI on platelet-SFTSV interaction by quantitative real-time PCR, molecular docking, surface plasmon resonance spectrometry, flow cytometry, western blot, and platelet functional studies in vitro. Interactions of SFTSV and platelet-SFTSV complexes with macrophages were also determined by scanning electron microscope, quantitative real-time PCR, and flow cytometry. RESULTS This study is the first to demonstrate that platelets are capable of harboring and producing SFTSV particles. Structural and functional studies found that SFTSVs bind platelet glycoprotein VI to potentiate platelet activation, including platelet aggregation, adenosine triphosphate release, spreading, clot retraction, coagulation, phosphatidylserine exposure, thrombus formation, and adherence. In vitro mechanistic studies highlighted that the interaction of platelets with human THP-1 cells promoted SFTSV clearance and suppressed cytokine production in macrophages. However, unwanted SFTSV replication in macrophages reciprocally aggravated SFTSV persistence in the circulation, which may contribute to thrombocytopenia and other complications during SFTSV infection. CONCLUSION These findings together highlighted the pathophysiological role of platelets in initial intrinsic defense against SFTSV infections, as well as intertwined processes with host immunity, which can also lead to thrombocytopenia and poor prognosis.
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Affiliation(s)
- Lei Fang
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China; Zhejiang Provincial Centers for Disease Control and Prevention, Hangzhou, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Sicong Yu
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaoxu Tian
- Department of Cardiology, Cardiovascular Center, Henan Key Laboratory of Hereditary, Cardiovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Wanrong Fu
- Department of Cardiology, Cardiovascular Center, Henan Key Laboratory of Hereditary, Cardiovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Lingxuan Su
- Zhejiang Provincial Centers for Disease Control and Prevention, Hangzhou, China
| | - Zhi Chen
- National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Hangzhou, China
| | - Chunlan Yan
- Department of Biophysics, College of Medicine, Zhejiang University, Hangzhou, China
| | - Ji He
- Blood Center of Zhejiang Province, Hangzhou, China
| | - Jin Hong
- Department of Cardiology, Cardiovascular Center, Henan Key Laboratory of Hereditary, Cardiovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Wenwen Lian
- National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Hangzhou, China
| | - Gangqiong Liu
- Department of Cardiology, Cardiovascular Center, Henan Key Laboratory of Hereditary, Cardiovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yanjun Zhang
- Zhejiang Provincial Centers for Disease Control and Prevention, Hangzhou, China.
| | - Jiancang Zhou
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China.
| | - Liang Hu
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China; Department of Cardiology, Cardiovascular Center, Henan Key Laboratory of Hereditary, Cardiovascular Diseases, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China; Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
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7
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Pulcinelli F, Curreli M, Natali PG, Quaresima V, Imberti L, Piantelli M. Development of the whole tomato and olive-based food supplement enriched with anti-platelet aggregating nutrients. Nutr Health 2022; 29:193-197. [PMID: 36300197 DOI: 10.1177/02601060221135334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Platelet dysfunctions are shared by cardiovascular diseases and a wide range of inflammatory diseases. Aims To determine the ability of a new whole tomato-based food supplement (WTBFS) containing carotenoid and olive polyphenols to inhibit platelet aggregation. Methods Aggregation was evaluated in platelet-rich plasma using microtiter plates and a plate reader. Results Platelets treated with WTBFS showed a >70% reduction of 5 µM adenosine diphosphate (ADP)-induced platelet aggregation; at 10 µM of ADP, the inhibitory effect of WTBFS was reduced of about 50%. Similarly, 78% and 48% reduction were obtained using 5 µg/mL and 10 µg /mL of collagen as an agonist Conclusion Since the compounds in WTBFS share the ability to inhibit STAT3, the inhibition of its signaling pathway may represent the mechanism underlying the antiplatelet activities. The activity of a lipophilic solution prepared from WTBS was in vitro tested on the platelet aggregation in response to ADP agonists and Collagen.
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Affiliation(s)
- Fabio Pulcinelli
- Department of Experimental Medicine, La Sapienza University of Rome, Rome, Italy
| | - Mariaignazia Curreli
- Department of Experimental Medicine, La Sapienza University of Rome, Rome, Italy
| | - Pier Giorgio Natali
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology, G. d’Annunzio University, Chieti, Italy
| | - Virginia Quaresima
- CREA Laboratory (AIL Center for Hemato-Oncologic Research), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Luisa Imberti
- CREA Laboratory (AIL Center for Hemato-Oncologic Research), Diagnostic Department, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Mauro Piantelli
- Department of Experimental Medicine, La Sapienza University of Rome, Rome, Italy
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8
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Angre T, Kumar A, Singh AK, Thareja S, Kumar P. Role of collagen regulators in cancer treatment: A comprehensive review. Anticancer Agents Med Chem 2022; 22:2956-2984. [DOI: 10.2174/1871520622666220501162351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/13/2022] [Accepted: 03/25/2022] [Indexed: 12/24/2022]
Abstract
Abstract:
Collagen is the most important structural protein and also a main component of extra-cellular matrix (ECM). It plays a role in tumor progression. Collagen can be regulated by altering it’s biosynthesis pathway through various signaling pathways, receptors and genes. Activity of cancer cells can also be regulated by other ECM components like metalloproteinases, hyaluronic acid, fibronectin and so on. Hypoxia is also one of the condition which leads to cancer progression by stimulating the expression of procollagen lysine as a collagen crosslinker, which increases the size of collagen fibres promoting cancer spread. The collagen content in cancerous cells leads to resistance in chemotherapy. So, to reduce this resistance, some of the collagen regulating therapies are introduced, which include inhibiting its biosynthesis, disturbing cancer cell signaling pathway, mediating ECM components and directly utilizing collagenase. This study is an effort to compile the strategies reported to control the collagen level and different collagen inhibitors reported so far. More research is needed in this area, growing understandings of collagen’s structural features and its role in cancer progression will aid in the advancement of newer chemotherapies.
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Affiliation(s)
- Tanuja Angre
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, India
| | - Adarsh Kumar
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, India
| | - Ankit Kumar Singh
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, India
| | - Suresh Thareja
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, India
| | - Pradeep Kumar
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, India
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9
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Transcriptional and Epigenetic Factors Associated with Early Thrombosis of Femoral Artery Involved in Arteriovenous Fistula. Proteomes 2022; 10:proteomes10020014. [PMID: 35645372 PMCID: PMC9149803 DOI: 10.3390/proteomes10020014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 02/04/2023] Open
Abstract
Arteriovenous fistulas (AVFs), created for hemodialysis in end-stage renal disease patients, mature through the outward remodeling of the outflow vein. However, early thrombosis and chronic inflammation are detrimental to the process of AVF maturation and precipitate AVF maturation failure. For the successful remodeling of the outflow vein, blood flow through the fistula is essential, but early arterial thrombosis attenuates this blood flow, and the vessels become thrombosed and stenosed, leading to AVF failure. The altered expression of various proteins involved in maintaining vessel patency or thrombosis is regulated by genes of which the expression is regulated by transcription factors and microRNAs. In this study, using thrombosed and stenosed arteries following AVF creation, we delineated transcription factors and microRNAs associated with differentially expressed genes in bulk RNA sequencing data using upstream and causal network analysis. We observed changes in many transcription factors and microRNAs that are involved in angiogenesis; vascular smooth muscle cell proliferation, migration, and phenotypic changes; endothelial cell function; hypoxia; oxidative stress; vessel remodeling; immune responses; and inflammation. These factors and microRNAs play a critical role in the underlying molecular mechanisms in AVF maturation. We also observed epigenetic factors involved in gene regulation associated with these molecular mechanisms. The results of this study indicate the importance of investigating the transcriptional and epigenetic regulation of AVF maturation and maturation failure and targeting factors precipitating early thrombosis and stenosis.
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10
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Zheng L, Duan Z, Tang D, He Y, Chen X, Chen Q, Li M. GP IIb/IIIa-Mediated Platelet Activation and Its Modulation of the Immune Response of Monocytes Against Candida albicans. Front Cell Infect Microbiol 2021; 11:783085. [PMID: 34938671 PMCID: PMC8685400 DOI: 10.3389/fcimb.2021.783085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 11/22/2021] [Indexed: 11/13/2022] Open
Abstract
Candida albicans is the most common fungal pathogen in humans, causing invasive disease and even potentially life-threatening systemic infections when tissue homeostasis is disrupted. Previous studies have identified an essential role of platelets in infection and immunity, especially when they are activated. However, it is still unclear whether platelets can be activated by C. albicans, and even less is known about the role of platelets in C. albicans infection. Herein, we showed that C. albicans induced platelet activation in vitro. C. albicans elevated the levels of AKT Ser473 phosphorylation, and inhibition of the PI3K-AKT signaling pathway reversed C. albicans-induced platelet activation. Surprisingly, C. albicans-induced platelet activation occurred in an integrin glycoprotein (GP) IIb/IIIa-dependent manner but was independent of the pattern recognition receptors toll-like receptor (TLR) 2 and TLR4. Interestingly, platelets enhanced the phagocytosis of human monocytes challenged with C. albicans and upregulated the expression of inflammatory cytokines, which were dependent on platelet activation mediated by GP IIb/IIIa. The present work provides new insights into the role of activated platelets in the defense against C. albicans, highlighting the importance of GP IIb/IIIa in the recognition of C. albicans.
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Affiliation(s)
- Lin Zheng
- Institute of Dermatology, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and Sexually Transmitted Infections, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Zhimin Duan
- Institute of Dermatology, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and Sexually Transmitted Infections, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | | | - Yanzhi He
- School of Public Health, Nanjing Medical University, Nanjing, China
| | - Xu Chen
- Institute of Dermatology, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and Sexually Transmitted Infections, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.,School of Public Health, Nanjing Medical University, Nanjing, China
| | - Qing Chen
- Jiangsu Province Blood Center, Nanjing, China.,Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Min Li
- Institute of Dermatology, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and Sexually Transmitted Infections, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.,Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
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11
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The brain-derived neurotrophic factor prompts platelet aggregation and secretion. Blood Adv 2021; 5:3568-3580. [PMID: 34546355 DOI: 10.1182/bloodadvances.2020004098] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 06/08/2021] [Indexed: 12/19/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) has both autocrine and paracrine roles in neurons, and its release and signaling mechanisms have been extensively studied in the central nervous system. Large quantities of BDNF have been reported in circulation, essentially stored in platelets with concentrations reaching 100- to 1000-fold those of neurons. Despite this abundance, the function of BDNF in platelet biology has not been explored. At low concentrations, BDNF primed platelets, acting synergistically with classical agonists. At high concentrations, BDNF induced complete biphasic platelet aggregation that in part relied on amplification from secondary mediators. Neurotrophin-4, but not nerve growth factor, and an activating antibody against the canonical BDNF receptor tropomyosin-related kinase B (TrkB) induced similar platelet responses to BDNF, suggesting TrkB could be the mediator. Platelets expressed, both at their surface and in their intracellular compartment, a truncated form of TrkB lacking its tyrosine kinase domain. BDNF-induced platelet aggregation was prevented by inhibitors of Ras-related C3 botulinum toxin substrate 1 (Rac1), protein kinase C, and phosphoinositide 3-kinase. BDNF-stimulated platelets secreted a panel of angiogenic and inflammatory cytokines, which may play a role in maintaining vascular homeostasis. Two families with autism spectrum disorder were found to carry rare missense variants in the BDNF gene. Platelet studies revealed defects in platelet aggregation to low concentrations of collagen, as well as reduced adenosine triphosphate secretion in response to adenosine diphosphate. In summary, circulating BDNF levels appear to regulate platelet activation, aggregation, and secretion through activation of a truncated TrkB receptor and downstream kinase-dependent signaling.
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12
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Parra-Izquierdo I, Melrose AR, Pang J, Lakshmanan HHS, Reitsma SE, Vavilapalli SH, Larson MK, Shatzel JJ, McCarty OJT, Aslan JE. Janus kinase inhibitors ruxolitinib and baricitinib impair glycoprotein-VI mediated platelet function. Platelets 2021; 33:404-415. [PMID: 34097573 PMCID: PMC8648864 DOI: 10.1080/09537104.2021.1934665] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Several Janus kinase (JAK) inhibitors (jakinibs) have recently been approved to treat inflammatory, autoimmune and hematological conditions. Despite emerging roles for JAKs and downstream signal transducer and activator of transcription (STAT) proteins in platelets, it remains unknown whether jakinibs affect platelet function. Here, we profile platelet biochemical and physiological responses in vitro in the presence of five different clinically relevant jakinibs, including ruxolitinib, upadacitinib, oclacitinib, baricitinib and tofacitinib. Flow cytometry, microscopy and other assays found that potent JAK1/2 inhibitors baricitinib and ruxolitinib reduced platelet adhesion to collagen, as well as platelet aggregation, secretion and integrin αIIbβ3 activation in response to the glycoprotein VI (GPVI) agonist collagen-related peptide (CRP-XL). Western blot analysis demonstrated that jakinibs reduced Akt phosphorylation and activation following GPVI activation, where ruxolitinib and baricitinib prevented DAPP1 phosphorylation. In contrast, jakinibs had no effects on platelet responses to thrombin. Inhibitors of GPVI and JAK signaling also abrogated platelet STAT5 phosphorylation following CRP-XL stimulation. Additional pharmacologic experiments supported roles for STAT5 in platelet secretion, integrin activation and cytoskeletal responses. Together, our results demonstrate that ruxolitinib and baricitinib have inhibitory effects on platelet function in vitro and support roles for JAK/STAT5 pathways in GPVI/ITAM mediated platelet function.
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Affiliation(s)
- Iván Parra-Izquierdo
- Knight Cardiovascular Institute and Division of Cardiology, Oregon Health & Science University, Portland, OR, USA.,Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA
| | - Alexander R Melrose
- Knight Cardiovascular Institute and Division of Cardiology, Oregon Health & Science University, Portland, OR, USA
| | - Jiaqing Pang
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA
| | | | - Stéphanie E Reitsma
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA
| | - Sai Hitesh Vavilapalli
- Knight Cardiovascular Institute and Division of Cardiology, Oregon Health & Science University, Portland, OR, USA
| | - Mark K Larson
- Biology Department, Augustana University, Sioux Falls, SD, USA
| | - Joseph J Shatzel
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA.,Division of Hematology and Medical Oncology, School of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Owen J T McCarty
- Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA.,Division of Hematology and Medical Oncology, School of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Joseph E Aslan
- Knight Cardiovascular Institute and Division of Cardiology, Oregon Health & Science University, Portland, OR, USA.,Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA.,Department of Chemical Physiology and Biochemistry, Oregon Health & Science University, Portland, OR, USA
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13
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Aslan JE. Platelet Proteomes, Pathways, and Phenotypes as Informants of Vascular Wellness and Disease. Arterioscler Thromb Vasc Biol 2021; 41:999-1011. [PMID: 33441027 PMCID: PMC7980774 DOI: 10.1161/atvbaha.120.314647] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Platelets rapidly undergo responsive transitions in form and function to repair vascular endothelium and mediate hemostasis. In contrast, heterogeneous platelet subpopulations with a range of primed or refractory phenotypes gradually arise in chronic inflammatory and other conditions in a manner that may indicate or support disease. Qualitatively distinguishable platelet phenotypes are increasingly associated with a variety of physiological and pathological circumstances; however, the origins and significance of platelet phenotypic variation remain unclear and conceptually vague. As changes in platelet function in disease exhibit many similarities to platelets following the activation of platelet agonist receptors, the intracellular responses of platelets common to hemostasis and inflammation may provide insights to the molecular basis of platelet phenotype. Here, we review concepts around how protein-level relations-from platelet receptors through intracellular signaling events-may help to define platelet phenotypes in inflammation, immune responses, aging, and other conditions. We further discuss how representing systems-wide platelet proteomics data profiles as circuit-like networks of causally related intracellular events, or, pathway maps, may inform molecular definitions of platelet phenotype. In addition to offering insights into platelets as druggable targets, maps of causally arranged intracellular relations underlying platelet function can also advance precision and interceptive medicine efforts by leveraging platelets as accessible, dynamic, endogenous, circulating biomarkers of vascular wellness and disease. Graphic Abstract: A graphic abstract is available for this article.
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Affiliation(s)
- Joseph E. Aslan
- Knight Cardiovascular Institute, School of Medicine, Oregon Health & Science University, Portland, Oregon, USA
- Department of Chemical Physiology and Biochemistry and School of Medicine, Oregon Health & Science University, Portland, Oregon, USA
- Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, Oregon, USA
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14
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Kotyla PJ, Engelmann M, Giemza-Stokłosa J, Wnuk B, Islam MA. Thromboembolic Adverse Drug Reactions in Janus Kinase (JAK) Inhibitors: Does the Inhibitor Specificity Play a Role? Int J Mol Sci 2021; 22:2449. [PMID: 33671049 PMCID: PMC7957632 DOI: 10.3390/ijms22052449] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/07/2020] [Accepted: 12/23/2020] [Indexed: 12/12/2022] Open
Abstract
Recent advances in immunology enabled the characterization of several signal transmitting pathways responsible for proper cytokine and chemokine signaling. Among them, Janus kinases (JAKs) are essential components of receptor activation systems. The discovery of JAK kinases enabled the synthesis of JAK kinase inhibitors (JAKi or Jakinibs), which have proven to be efficacious in the treatment of hematologic malignancies and several rheumatological disorders and continue to be investigated in many clinical indications. Blocking multiple cytokines belonging to several cytokine families with a single small molecule may, however, create a potential risk for the patients. Recently, a higher risk of thromboembolic complications, namely, deep vein thrombosis and pulmonary embolism, has been recognized as the main concern during treatment with Jakinibs. At present, it is not entirely clear whether this increased risk is related to direct cytokine blockade, the presence of concomitant diseases in treated patients or other unknown circumstances that work together to increase the risk of this side effect. In this review, we discuss data on the risk of thromboembolic side effects, with special emphasis on the mechanism that may be responsible for this increased risk. Many indirect data indicate that higher thromboembolic risk may be related to the specificity of JAK inhibitor action, such that preferentially blocking one signaling pathway upsets the balance between pro and anti-thrombotic activities.
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Affiliation(s)
- Przemysław J. Kotyla
- Department of Internal Medicine, Rheumatology and Clinical Immunology, Faculty in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
| | - Małgorzata Engelmann
- Department of Physiotherapy in Internal Medicine, Academy of Physical Education in Katowice, 40-065 Katowice, Poland;
| | | | - Bartosz Wnuk
- Department of Rehabilitation, Faculty of Health Sciences in Katowice, Medical University of Silesia, 40-635 Katowice, Poland;
| | - Md Asiful Islam
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
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15
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Mohtashami M, Razavi A, Abolhassani H, Aghamohammadi A, Yazdani R. Primary Immunodeficiency and Thrombocytopenia. Int Rev Immunol 2021; 41:135-159. [PMID: 33464134 DOI: 10.1080/08830185.2020.1868454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Primary immunodeficiency (PID) or Inborn errors of immunity (IEI) refers to a heterogeneous group of disorders characterized by immune system impairment. Although patients with IEI manifest highly variable symptoms, the most common clinical manifestations are recurrent infections, autoimmunity and malignancies. Some patients present hematological abnormality including thrombocytopenia due to different pathogenic mechanisms. This review focuses on primary and secondary thrombocytopenia as a complication, which can occur in IEI. Based on the International Union of Immunological Societies phenotypic classification for IEI, the several innate and adaptive immunodeficiency disorders can lead to thrombocytopenia. This review, for the first time, describes manifestation, mechanism and therapeutic modalities for thrombocytopenia in different classes of IEI.
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Affiliation(s)
- Maryam Mohtashami
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.,Research Center for Immunodeficiencies, Tehran University of Medical Sciences, Tehran, Iran
| | - Azadehsadat Razavi
- Research Center for Immunodeficiencies, Tehran University of Medical Sciences, Tehran, Iran.,Department of Animal Biology, Faculty of Biology Sciences, University of Kharazmi, Tehran, Iran.,Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Hassan Abolhassani
- Research Center for Immunodeficiencies, Tehran University of Medical Sciences, Tehran, Iran.,Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Asghar Aghamohammadi
- Research Center for Immunodeficiencies, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Yazdani
- Research Center for Immunodeficiencies, Tehran University of Medical Sciences, Tehran, Iran
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16
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Hu S, Guo P, Wang Z, Zhou Z, Wang R, Zhang M, Tao J, Tai Y, Zhou W, Wei W, Wang Q. Down-regulation of A 3AR signaling by IL-6-induced GRK2 activation contributes to Th17 cell differentiation. Exp Cell Res 2021; 399:112482. [PMID: 33434531 DOI: 10.1016/j.yexcr.2021.112482] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 01/04/2021] [Accepted: 01/06/2021] [Indexed: 12/22/2022]
Abstract
IL-6-triggered Th17 cell expansion is responsible for the pathogenesis of many immune diseases including rheumatoid arthritis (RA). Traditionally, IL-6 induces Th17 cell differentiation through JAK-STAT3 signaling. In the present work, PKA inhibition reduces in vitro induction of Th17 cells, while IL-6 stimulation of T cells facilitates the internalization of A3AR and increased cAMP production in a GRK2 dependent manner. Inhibition of GRK2 by paroxetine (PAR) or genetic depletion of GRK2 restored A3AR distribution and prevented Th17 cell differentiation. Furthermore, in vivo PAR treatment effectively reduced the splenic Th17 cell proportion in a rat model of collagen-induced arthritis (CIA) which was accompanied by a significant improvement in clinical manifestations. These results indicate that IL-6-induced Th17 cell differentiation not only occurs through JAK-STAT3-RORγt but is also mediated through GRK2-A3AR-cAMP-PKA-CREB/ICER-RORγt. This elucidates the significance of GRK2-controlled cAMP signaling in the differentiation of Th17 cells and its potential application in treating Th17-driven immune diseases such as RA.
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Affiliation(s)
- Shanshan Hu
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China; Anhui No.2 Provincial People's Hospital, Hefei, Anhui, 230041, China
| | - Paipai Guo
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Zhen Wang
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Zhengwei Zhou
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Rui Wang
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Mei Zhang
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Juan Tao
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Yu Tai
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Weijie Zhou
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China
| | - Wei Wei
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China.
| | - Qingtong Wang
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicines, Hefei, Anhui, 230032, China.
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17
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Borst O, Gawaz M. Glycoprotein VI - novel target in antiplatelet medication. Pharmacol Ther 2021; 217:107630. [DOI: 10.1016/j.pharmthera.2020.107630] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/11/2020] [Indexed: 02/07/2023]
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18
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Bharadwaj U, Kasembeli MM, Robinson P, Tweardy DJ. Targeting Janus Kinases and Signal Transducer and Activator of Transcription 3 to Treat Inflammation, Fibrosis, and Cancer: Rationale, Progress, and Caution. Pharmacol Rev 2020; 72:486-526. [PMID: 32198236 PMCID: PMC7300325 DOI: 10.1124/pr.119.018440] [Citation(s) in RCA: 165] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Before it was molecularly cloned in 1994, acute-phase response factor or signal transducer and activator of transcription (STAT)3 was the focus of intense research into understanding the mammalian response to injury, particularly the acute-phase response. Although known to be essential for liver production of acute-phase reactant proteins, many of which augment innate immune responses, molecular cloning of acute-phase response factor or STAT3 and the research this enabled helped establish the central function of Janus kinase (JAK) family members in cytokine signaling and identified a multitude of cytokines and peptide hormones, beyond interleukin-6 and its family members, that activate JAKs and STAT3, as well as numerous new programs that their activation drives. Many, like the acute-phase response, are adaptive, whereas several are maladaptive and lead to chronic inflammation and adverse consequences, such as cachexia, fibrosis, organ dysfunction, and cancer. Molecular cloning of STAT3 also enabled the identification of other noncanonical roles for STAT3 in normal physiology, including its contribution to the function of the electron transport chain and oxidative phosphorylation, its basal and stress-related adaptive functions in mitochondria, its function as a scaffold in inflammation-enhanced platelet activation, and its contributions to endothelial permeability and calcium efflux from endoplasmic reticulum. In this review, we will summarize the molecular and cellular biology of JAK/STAT3 signaling and its functions under basal and stress conditions, which are adaptive, and then review maladaptive JAK/STAT3 signaling in animals and humans that lead to disease, as well as recent attempts to modulate them to treat these diseases. In addition, we will discuss how consideration of the noncanonical and stress-related functions of STAT3 cannot be ignored in efforts to target the canonical functions of STAT3, if the goal is to develop drugs that are not only effective but safe. SIGNIFICANCE STATEMENT: Key biological functions of Janus kinase (JAK)/signal transducer and activator of transcription (STAT)3 signaling can be delineated into two broad categories: those essential for normal cell and organ development and those activated in response to stress that are adaptive. Persistent or dysregulated JAK/STAT3 signaling, however, is maladaptive and contributes to many diseases, including diseases characterized by chronic inflammation and fibrosis, and cancer. A comprehensive understanding of JAK/STAT3 signaling in normal development, and in adaptive and maladaptive responses to stress, is essential for the continued development of safe and effective therapies that target this signaling pathway.
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Affiliation(s)
- Uddalak Bharadwaj
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Moses M Kasembeli
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - Prema Robinson
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
| | - David J Tweardy
- Department of Infectious Diseases, Infection Control & Employee Health, Division of Internal Medicine (U.B., M.M.K., P.R., D.J.T.), and Department of Molecular and Cellular Oncology (D.J.T.), University of Texas, MD Anderson Cancer Center, Houston, Texas
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19
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Peng W, Dong N, Wu S, Gui D, Ye Z, Wu H, Zhong X. miR-4500 suppresses cell proliferation and migration in bladder cancer via inhibition of STAT3/CCR7 pathway. J Cell Biochem 2020; 121:3913-3922. [PMID: 31788846 DOI: 10.1002/jcb.29558] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 10/10/2019] [Indexed: 01/24/2023]
Abstract
Bladder cancer (BC) is a prevalent type of cancer that occurs in human urinary system threatening the human health. microRNA-4500 (miRNA-4500) is a novel miRNA that serves as a potential biomarker in several types of cancers. However, the in-depth molecular mechanism of miR-4500 in BC has not yet been fully elucidated. Quantitative real-time polymerase chain reactionq and Western blot analysis were applied to analyze the expressions of miR-4500, STAT3, and C-C chemokine receptor 7 (CCR7). Gain-of-function assays involving Cell Counting Kit-8, 5'-ethynyl-2'-deoxyuridine incorporation assay, and Transwell were employed to evaluate miR-4500 function in cell proliferation and migration. Moreover, chromatin immunoprecipitation, RNA immunoprecipitation, and luciferase reporter assay were performed to explore the molecular mechanism underlying function of miR-4500. We found the downregulation of miR-4500 in BC cells, and ectopic expression of miR-4500 hampered cell proliferation, migration, and epithelial-to-mesenchymal transition. Importantly, miR-4500 directly targeted STAT3 3'-untranslated region, leading to repression on STAT3 expression. Intriguingly, STAT3 transcriptionally regulated CCR7. Rescue experiments validated the presence of miR-4500/STAT3/CCR7 axis in control of BC growth and progression. Our data highlighted miR-4500 as a potent cancericidal gene in BC, and might provide a theoretical grounding for development of target-oriented therapies of patients afflicted with BC.
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Affiliation(s)
- Wei Peng
- Departmet of Urology Surgery, Huangshi Central Hospital, EDONG Healthcare, Huangshi, Hubei, China
| | - Na Dong
- Department of Orthopedics, Spine Trauma, Yidu Central Hospital, Weifang, China
| | - Shihao Wu
- Department of Urology, Shunde Hospital, Southern Medical University, Foshan, Guangdong, China
| | - Dingwen Gui
- Departmet of Urology Surgery, Huangshi Central Hospital, EDONG Healthcare, Huangshi, Hubei, China
| | - Zhihua Ye
- Departmet of Urology Surgery, Huangshi Central Hospital, EDONG Healthcare, Huangshi, Hubei, China
| | - Haixia Wu
- Departmet of Urology Surgery, Huangshi Central Hospital, EDONG Healthcare, Huangshi, Hubei, China
| | - Xintai Zhong
- Department of Urology, Shunde Hospital, Southern Medical University, Foshan, Guangdong, China
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20
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Morris EJ, Gillespie JA, Maxwell CA, Dedhar S. A Model of Differential Mammary Growth Initiation by Stat3 and Asymmetric Integrin-α6 Inheritance. Cell Rep 2020; 30:3605-3615.e5. [PMID: 32187533 DOI: 10.1016/j.celrep.2020.02.079] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/13/2020] [Accepted: 02/20/2020] [Indexed: 12/29/2022] Open
Abstract
Multiple cancer-related genes both promote and paradoxically suppress growth initiation, depending on the cell context. We discover an explanation for how this occurs for one such protein, Stat3, based on asymmetric cell division. Here, we show that Stat3, by Stathmin/PLK-1, regulates mitotic spindle orientation, and we use it to create and test a model for differential growth initiation. We demonstrate that Integrin-α6 is polarized and required for mammary growth initiation. Spindles orient relative to polar Integrin-α6, dividing perpendicularly in normal cells and parallel in tumor-derived cells, resulting in asymmetric or symmetric Integrin-α6 inheritance, respectively. Stat3 inhibition randomizes spindle orientation, which promotes normal growth initiation while reducing tumor-derived growth initiation. Lipid raft disruption depolarizes Integrin-α6, inducing spindle-orientation-independent Integrin-α6 inheritance. Stat3 inhibition no longer affects the growth of these cells, suggesting Stat3 acts through the regulation of spindle orientation to control growth initiation.
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Affiliation(s)
- Edward J Morris
- Department of Integrative Oncology, BC Cancer Research Centre, BC Cancer Agency, Vancouver, BC, Canada; Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital, Vancouver, BC, Canada.
| | - Jordan A Gillespie
- Department of Integrative Oncology, BC Cancer Research Centre, BC Cancer Agency, Vancouver, BC, Canada
| | - Christopher A Maxwell
- Michael Cuccione Childhood Cancer Research Program, BC Children's Hospital, Vancouver, BC, Canada; Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada.
| | - Shoukat Dedhar
- Department of Integrative Oncology, BC Cancer Research Centre, BC Cancer Agency, Vancouver, BC, Canada; Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada.
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21
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Latorre AM, Santos MT, Vallés J, Bonanad S, Moscardó A. Signal transducer and activator of transcription 3 (STAT3) phosphorylation regulates thromboxane A 2 receptor activity in human platelets. Br J Haematol 2019; 188:e39-e42. [PMID: 31858582 DOI: 10.1111/bjh.16309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/13/2019] [Accepted: 09/13/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Ana María Latorre
- Haemostasis and Thrombosis Unit, Health Research Institute La Fe, University and Polytechnic Hospital La Fe, Valencia, Spain
| | - María Teresa Santos
- Haemostasis and Thrombosis Unit, Health Research Institute La Fe, University and Polytechnic Hospital La Fe, Valencia, Spain
| | - Juana Vallés
- Haemostasis and Thrombosis Unit, Health Research Institute La Fe, University and Polytechnic Hospital La Fe, Valencia, Spain
| | - Santiago Bonanad
- Haemostasis and Thrombosis Unit, Health Research Institute La Fe, University and Polytechnic Hospital La Fe, Valencia, Spain
| | - Antonio Moscardó
- Haemostasis and Thrombosis Unit, Health Research Institute La Fe, University and Polytechnic Hospital La Fe, Valencia, Spain
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22
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Arauna D, Furrianca M, Espinosa-Parrilla Y, Fuentes E, Alarcón M, Palomo I. Natural Bioactive Compounds As Protectors Of Mitochondrial Dysfunction In Cardiovascular Diseases And Aging. Molecules 2019; 24:molecules24234259. [PMID: 31766727 PMCID: PMC6930637 DOI: 10.3390/molecules24234259] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/05/2019] [Accepted: 09/08/2019] [Indexed: 01/04/2023] Open
Abstract
Diet, particularly the Mediterranean diet, has been considered as a protective factor against the development of cardiovascular diseases, the main cause of death in the world. Aging is one of the major risk factors for cardiovascular diseases, which have an oxidative pathophysiological component, being the mitochondria one of the key organelles in the regulation of oxidative stress. Certain natural bioactive compounds have the ability to regulate oxidative phosphorylation, the production of reactive oxygen species and the expression of mitochondrial proteins; but their efficacy within the mitochondrial physiopathology of cardiovascular diseases has not been clarified yet. The following review has the purpose of evaluating several natural compounds with evidence of mitochondrial effect in cardiovascular disease models, ascertaining the main cellular mechanisms and their potential use as functional foods for prevention of cardiovascular disease and healthy aging.
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Affiliation(s)
- Diego Arauna
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Center on Aging, Universidad de Talca, Talca 3460000, Chile; (D.A.); (M.A.)
| | - María Furrianca
- Thematic Task Force on Aging, CUECH Research Network, Santiago 8320000, Chile; (M.F.); (Y.E.-P.)
- Departamento de enfermería, Universidad de Magallanes, Punta Arenas 6200000, Chile
| | - Yolanda Espinosa-Parrilla
- Thematic Task Force on Aging, CUECH Research Network, Santiago 8320000, Chile; (M.F.); (Y.E.-P.)
- Laboratory of Molecular Medicine —LMM, Center for Education, Healthcare and Investigation—CADI, Universidad de Magallanes, Punta Arenas 6200000, Chile
- School of Medicine, Universidad de Magallanes, Punta Arenas 6200000, Chile
| | - Eduardo Fuentes
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Center on Aging, Universidad de Talca, Talca 3460000, Chile; (D.A.); (M.A.)
- Thematic Task Force on Aging, CUECH Research Network, Santiago 8320000, Chile; (M.F.); (Y.E.-P.)
- Correspondence: (E.F.); (I.P.)
| | - Marcelo Alarcón
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Center on Aging, Universidad de Talca, Talca 3460000, Chile; (D.A.); (M.A.)
- Thematic Task Force on Aging, CUECH Research Network, Santiago 8320000, Chile; (M.F.); (Y.E.-P.)
| | - Iván Palomo
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Center on Aging, Universidad de Talca, Talca 3460000, Chile; (D.A.); (M.A.)
- Thematic Task Force on Aging, CUECH Research Network, Santiago 8320000, Chile; (M.F.); (Y.E.-P.)
- Correspondence: (E.F.); (I.P.)
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23
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Li JY, Chen RJ, Huang LT, Lee TY, Lu WJ, Lin KH. Embelin as a Novel Inhibitor of PKC in the Prevention of Platelet Activation and Thrombus Formation. J Clin Med 2019; 8:jcm8101724. [PMID: 31635287 PMCID: PMC6832570 DOI: 10.3390/jcm8101724] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/09/2019] [Accepted: 10/16/2019] [Indexed: 12/25/2022] Open
Abstract
Embelin is a quinone derivative and found in the fruits of Embelia ribes Burm.f. Embelin has been identified as a small molecular inhibitor of X-chromosome-linked inhibitor of apoptosis proteins, and has multiple biological activities, including antioxidation, anti-inflammation, and antitumor effects. However, the effect of embelin in platelets remains unclear. Thus, this study investigated the antiplatelet mechanism of embelin. Our data revealed that embelin could inhibit platelet aggregation induced by various agonists, including the protein kinase C (PKC) activator phorbol 12,13-dibutyrate (PDBu). Embelin, as well as the PKC inhibitor Ro 31-8220, markedly reduced PDBu-mediated phosphorylation of the PKC substrate, suggesting that embelin may be a PKC inhibitor for platelets. Embelin could block PKC downstream signaling and events, including the inhibition of protein kinase B and mitogen-activated protein kinase activation, granule release, and glycoprotein IIbIIIa activation. Moreover, embelin could delay thrombus formation in the mesenteric microvessels of mice, but did not significantly affect the tail bleeding time. In conclusion, we demonstrated that embelin is a PKC inhibitor and possesses antiplatelet and antithrombotic effects. The further analysis is necessary to more accurately determine clinical therapeutic potential of embelin in all clinical thromboembolic events with disturbance of thrombocyte function.
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Affiliation(s)
- Jiun Yi Li
- Department of Medicine, Mackay Medical College, New Taipei City 252, Taiwan.
- Department of Surgery, MacKay Memorial Hospital, Taipei 104, Taiwan.
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Ray Jade Chen
- Division of General Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei 110, Taiwan.
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Li Ting Huang
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Tzu Yin Lee
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Wan Jung Lu
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Medical Research, Taipei Medical University Hospital, Taipei 110, Taiwan.
- Graduate Institute of Metabolism and Obesity Sciences, College of Nutrition, Taipei Medical University, Taipei 110, Taiwan.
| | - Kuan Hung Lin
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Institute of Biomedical Sciences, Mackay Medical College, New Taipei City 252, Taiwan.
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Houck KL, Yuan H, Tian Y, Solomon M, Cramer D, Liu K, Zhou Z, Wu X, Zhang J, Oehler V, Dong JF. Physical proximity and functional cooperation of glycoprotein 130 and glycoprotein VI in platelet membrane lipid rafts. J Thromb Haemost 2019; 17:1500-1510. [PMID: 31145836 DOI: 10.1111/jth.14525] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 05/28/2019] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Clinical and laboratory studies have demonstrated that platelets become hyperactive and prothrombotic in conditions of inflammation. We have previously shown that the proinflammatory cytokine interleukin (IL)-6 forms a complex with soluble IL-6 receptor α (sIL-6Rα) to prime platelets for activation by subthreshold concentrations of collagen. Upon being stimulated with collagen, the transcription factor signal transducer and activator of transcription (STAT) 3 in platelets is phosphorylated and dimerized to act as a protein scaffold to facilitate the catalytic action between the kinase Syk and the substrate phospholipase Cγ2 (PLCγ2) in collagen-induced signaling. However, it remains unknown how collagen induces phosphorylation and dimerization of STAT3. METHODS AND RESULTS We conducted complementary in vitro experiments to show that the IL-6 receptor subunit glycoprotein 130 (GP130) was in physical proximity to the collagen receptor glycoprotein VI (GPVI in membrane lipid rafts of platelets. This proximity allows collagen to induce STAT3 activation and dimerization, and the IL-6-sIL-6Rα complex to activate the kinase Syk and the substrate PLCγ2 in the GPVI signal pathway, resulting in an enhanced platelet response to collagen. Disrupting lipid rafts or blocking GP130-Janus tyrosine kinase (JAK)-STAT3 signaling abolished the cross-activation and reduced platelet reactivity to collagen. CONCLUSION These results demonstrate cross-talk between collagen and IL-6 signal pathways. This cross-talk could potentially provide a novel mechanism for inflammation-induced platelet hyperactivity, so the IL-6-GP130-JAK-STAT3 pathway has been identified as a potential target to block this hyperactivity.
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Affiliation(s)
| | - Hengjie Yuan
- Tianjin Neurological Institute, General Hospital, Tianjin Medical University, Tianjin, China
| | - Ye Tian
- Tianjin Neurological Institute, General Hospital, Tianjin Medical University, Tianjin, China
| | | | - Drake Cramer
- Bloodworks Research Institute, Seattle, Washington
| | - Kitty Liu
- Bloodworks Research Institute, Seattle, Washington
| | - Zhou Zhou
- State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Beijing, China
| | - Xiaoping Wu
- Bloodworks Research Institute, Seattle, Washington
| | - Jianning Zhang
- Tianjin Neurological Institute, General Hospital, Tianjin Medical University, Tianjin, China
| | - Vivian Oehler
- Clinical Research Division, Hutchison Cancer Center, Seattle, Washington
- Seattle Cancer Alliances, Seattle, Washington
- Division of Hematology, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington
| | - Jing-Fei Dong
- Bloodworks Research Institute, Seattle, Washington
- Division of Hematology, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington
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TNF-α-driven inflammation and mitochondrial dysfunction define the platelet hyperreactivity of aging. Blood 2019; 134:727-740. [PMID: 31311815 DOI: 10.1182/blood.2019000200] [Citation(s) in RCA: 174] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 07/02/2019] [Indexed: 12/11/2022] Open
Abstract
Aging and chronic inflammation are independent risk factors for the development of atherothrombosis and cardiovascular disease. We hypothesized that aging-associated inflammation promotes the development of platelet hyperreactivity and increases thrombotic risk during aging. Functional platelet studies in aged-frail adults and old mice demonstrated that their platelets are hyperreactive and form larger thrombi. We identified tumor necrosis factor α (TNF-α) as the key aging-associated proinflammatory cytokine responsible for platelet hyperreactivity. We further showed that platelet hyperreactivity is neutralized by abrogating signaling through TNF-α receptors in vivo in a mouse model of aging. Analysis of the bone marrow compartments showed significant platelet-biased hematopoiesis in old mice reflected by increased megakaryocyte-committed progenitor cells, megakaryocyte ploidy status, and thrombocytosis. Single-cell RNA-sequencing analysis of native mouse megakaryocytes showed significant reprogramming of inflammatory, metabolic, and mitochondrial gene pathways in old mice that appeared to play a significant role in determining platelet hyperreactivity. Platelets from old mice (where TNF-α was endogenously increased) and from young mice exposed to exogenous TNF-α exhibited significant mitochondrial changes characterized by elevated mitochondrial mass and increased oxygen consumption during activation. These mitochondrial changes were mitigated upon TNF-α blockade. Similar increases in platelet mitochondrial mass were seen in platelets from patients with myeloproliferative neoplasms, where TNF-α levels are also increased. Furthermore, metabolomics studies of platelets from young and old mice demonstrated age-dependent metabolic profiles that may differentially poise platelets for activation. Altogether, we present previously unrecognized evidence that TNF-α critically regulates megakaryocytes resident in the bone marrow niche and aging-associated platelet hyperreactivity and thrombosis.
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Villaseñor T, Madrid-Paulino E, Maldonado-Bravo R, Pérez-Martínez L, Pedraza-Alva G. Mycobacterium bovis BCG promotes IL-10 expression by establishing a SYK/PKCα/β positive autoregulatory loop that sustains STAT3 activation. Pathog Dis 2019; 77:5512589. [PMID: 31175361 DOI: 10.1093/femspd/ftz032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 06/05/2019] [Indexed: 01/02/2023] Open
Abstract
Mycobacterium ensures its survival inside macrophages and long-term infection by subverting the innate and adaptive immune response through the modulation of cytokine gene expression profiles. Different Mycobacterium species promote the expression of TGFβ and IL-10, which, at the early stages of infection, block the formation of the phagolysosome, thereby securing mycobacterial survival upon phagocytosis, and at later stages, antagonize IFNγ production and functions. Despite the key role of IL-10 in mycobacterium infection, the signal transduction pathways leading to IL-10 expression in infected macrophages are poorly understood. Here, we report that Mycobacterium bovis BCG promotes IL-10 expression and cytokine production by establishing a SYK/PKCα/β positive feedback loop that leads to STAT3 activation.
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Affiliation(s)
- Tomás Villaseñor
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos 62271, México
| | - Edgardo Madrid-Paulino
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos 62271, México
| | - Rafael Maldonado-Bravo
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos 62271, México
| | - Leonor Pérez-Martínez
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos 62271, México
| | - Gustavo Pedraza-Alva
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos 62271, México
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Senchenkova EY, Russell J, Yildirim A, Granger DN, Gavins FNE. Novel Role of T Cells and IL-6 (Interleukin-6) in Angiotensin II-Induced Microvascular Dysfunction. Hypertension 2019; 73:829-838. [PMID: 30739537 PMCID: PMC6422352 DOI: 10.1161/hypertensionaha.118.12286] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/15/2019] [Indexed: 12/11/2022]
Abstract
Hypertension is an established risk factor for subsequent cardiovascular diseases, with Ang II (angiotensin II) playing a major role in mediating thrombotic and inflammatory abnormalities. Although T cells and IL-6 (interleukin-6) play an important role in adaptive immune responses, little is known about their role(s) in the thromboinflammatory responses associated with Ang II. Here we show using intravital microscopy coupled with the light/dye injury model that Rag-1 deficient (Rag-1-/-) and IL-6 deficient (IL-6-/-) mice are afforded protection against Ang II-induced thrombosis. Blocking IL-6 receptors (using CD126 and gp130 antibodies) significantly diminished Ang II-mediated thrombosis and inflammatory cell recruitment in mice. Furthermore, the adoptive transfer of IL-6-/--derived T cells into Rag-1-/- mice failed to accelerate Ang II-induced thrombosis compared with Rag-1-/- mice reconstituted with wild-type-derived T cells, suggesting T cell IL-6 mediates the thrombotic abnormalities associated Ang II hypertension. Interestingly, adoptive transfer of WT T cells into Rag-1-/-/Ang II mice resulted in increased numbers of immature platelets, which constitutes a more active platelet population, that is, prothrombotic and proinflammatory. To translate our in vivo findings, we used clinical samples to demonstrate that IL-6 also predisposes platelets to an interaction with collagen receptors, thereby increasing the propensity for platelets to aggregate and cause thrombosis. In summary, we provide compelling evidence for the involvement of IL-6, IL-6R, and T-cell-dependent IL-6 signaling in Ang II-induced thromboinflammation, which may provide new therapeutic possibilities for drug discovery programs for the management of hypertension.
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Affiliation(s)
- Elena Y. Senchenkova
- Department of Molecular & Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, 71105, USA
| | - Janice Russell
- Department of Molecular & Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, 71105, USA
| | - Alper Yildirim
- Department of Molecular & Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, 71105, USA
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
| | - D. Neil Granger
- Department of Molecular & Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, 71105, USA
| | - Felicity N. E. Gavins
- Department of Molecular & Cellular Physiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, 71105, USA
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Sereni L, Castiello MC, Di Silvestre D, Della Valle P, Brombin C, Ferrua F, Cicalese MP, Pozzi L, Migliavacca M, Bernardo ME, Pignata C, Farah R, Notarangelo LD, Marcus N, Cattaneo L, Spinelli M, Giannelli S, Bosticardo M, van Rossem K, D'Angelo A, Aiuti A, Mauri P, Villa A. Lentiviral gene therapy corrects platelet phenotype and function in patients with Wiskott-Aldrich syndrome. J Allergy Clin Immunol 2019; 144:825-838. [PMID: 30926529 PMCID: PMC6721834 DOI: 10.1016/j.jaci.2019.03.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/12/2019] [Accepted: 03/18/2019] [Indexed: 12/15/2022]
Abstract
Background Thrombocytopenia is a serious issue for all patients with classical Wiskott-Aldrich syndrome (WAS) and X-linked thrombocytopenia (XLT) because it causes severe and life-threatening bleeding. Lentiviral gene therapy (GT) for WAS has shown promising results in terms of immune reconstitution. However, despite the reduced severity and frequency of bleeding events, platelet counts remain low in GT-treated patients. Objective We carefully investigated platelet defects in terms of phenotype and function in untreated patients with WAS and assessed the effect of GT treatment on platelet dysfunction. Methods We analyzed a cohort of 20 patients with WAS/XLT, 15 of them receiving GT. Platelet phenotype and function were analyzed by using electron microscopy, flow cytometry, and an aggregation assay. Platelet protein composition was assessed before and after GT by means of proteomic profile analysis. Results We show that platelets from untreated patients with WAS have reduced size, abnormal ultrastructure, and a hyperactivated phenotype at steady state, whereas activation and aggregation responses to agonists are decreased. GT restores platelet size and function early after treatment and reduces the hyperactivated phenotype proportionally to WAS protein expression and length of follow-up. Conclusions Our study highlights the coexistence of morphologic and multiple functional defects in platelets lacking WAS protein and demonstrates that GT normalizes the platelet proteomic profile with consequent restoration of platelet ultrastructure and phenotype, which might explain the observed reduction of bleeding episodes after GT. These results are instrumental also from the perspective of a future clinical trial in patients with XLT only presenting with microthrombocytopenia.
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Affiliation(s)
- Lucia Sereni
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Maria Carmina Castiello
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Dario Di Silvestre
- Proteomic and Metabolomic Laboratory, Institute of Biomedical Technologies, National Research Council (ITB-CNR), Segrate, Italy
| | - Patrizia Della Valle
- Coagulation Service & Thrombosis Research Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Chiara Brombin
- University Centre for Statistics in the Biomedical Sciences (CUSSB), Vita-Salute San Raffaele University, Milan, Italy
| | - Francesca Ferrua
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy; Pediatric Immunohematology Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Maria Pia Cicalese
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy; Pediatric Immunohematology Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Loris Pozzi
- Coagulation Service & Thrombosis Research Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Maddalena Migliavacca
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy; Pediatric Immunohematology Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Maria Ester Bernardo
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy; Pediatric Immunohematology Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Claudio Pignata
- Pediatric Section, Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Roula Farah
- Department of Pediatrics, Division of Hematology-Oncology, Saint George Hospital University Medical Centre, Beirut, Lebanon
| | - Lucia Dora Notarangelo
- Pediatric Onco-Haematology and BMT Unit, Children's Hospital, ASST Spedali Civili of Brescia, Brescia, Italy
| | - Nufar Marcus
- Department of Pediatrics, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Kipper Institute of Immunology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | - Marco Spinelli
- Pediatric Clinic, MBBM Foundation, Maria Letizia Verga Center, Monza, Italy
| | - Stefania Giannelli
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Marita Bosticardo
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Koen van Rossem
- Rare Diseases Unit, GlaxoSmithKline, Brentford, United Kingdom
| | - Armando D'Angelo
- Coagulation Service & Thrombosis Research Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Alessandro Aiuti
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy; Pediatric Immunohematology Unit, San Raffaele Scientific Institute, Milan, Italy
| | - Pierluigi Mauri
- Proteomic and Metabolomic Laboratory, Institute of Biomedical Technologies, National Research Council (ITB-CNR), Segrate, Italy
| | - Anna Villa
- San Raffaele Telethon Institute for Gene Therapy (SR-Tiget), Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan, Italy; Milan Unit, Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche, Milan, Italy.
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30
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Sun J, Zhang M, Chen K, Chen B, Zhao Y, Gong H, Zhao X, Qi R. Suppression of TLR4 activation by resveratrol is associated with STAT3 and Akt inhibition in oxidized low-density lipoprotein-activated platelets. Eur J Pharmacol 2018; 836:1-10. [DOI: 10.1016/j.ejphar.2018.08.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 08/08/2018] [Accepted: 08/10/2018] [Indexed: 12/17/2022]
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Unsworth AJ, Bye AP, Kriek N, Sage T, Osborne AA, Donaghy D, Gibbins JM. Cobimetinib and trametinib inhibit platelet MEK but do not cause platelet dysfunction. Platelets 2018; 30:762-772. [PMID: 30252580 PMCID: PMC6594423 DOI: 10.1080/09537104.2018.1514107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The MEK inhibitors cobimetinib and trametinib are used in combination with BRAF inhibitors to treat metastatic melanoma but increase rates of hemorrhage relative to BRAF inhibitors alone. Platelets express several members of the MAPK signalling cascade including MEK1 and MEK2 and ERK1 and ERK2 but their role in platelet function and haemostasis is ambiguous as previous reports have been contradictory. It is therefore unclear if MEK inhibitors might be causing platelet dysfunction and contributing to increased hemorrhage. In the present study we performed pharmacological characterisation of cobimetinib and trametinib in vitro to investigate potential for MEK inhibitors to cause platelet dysfunction. We report that whilst both cobimetinib and trametinib are potent inhibitors of platelet MEK activity, treatment with trametinib did not alter platelet function. Treatment with cobimetinib results in inhibition of platelet aggregation, integrin activation, alpha-granule secretion and adhesion but only at suprapharmacological concentrations. We identified that the inhibitory effects of high concentrations of cobimetinib are associated with off-target inhibition on Akt and PKC. Neither inhibitor caused any alteration in thrombus formation on collagen under flow conditions in vitro. Our findings demonstrate that platelets are able to function normally when MEK activity is fully inhibited, indicating MEK activity is dispensable for normal platelet function. We conclude that the MEK inhibitors cobimetinib and trametinib do not induce platelet dysfunction and are therefore unlikely to contribute to increased incidence of bleeding reported during MEK inhibitor therapy.
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Affiliation(s)
- Amanda J Unsworth
- a Institute for Cardiovascular and Metabolic Research , University of Reading, School of Biological Sciences , Reading , UK
| | - Alexander P Bye
- a Institute for Cardiovascular and Metabolic Research , University of Reading, School of Biological Sciences , Reading , UK
| | - Neline Kriek
- a Institute for Cardiovascular and Metabolic Research , University of Reading, School of Biological Sciences , Reading , UK
| | - Tanya Sage
- a Institute for Cardiovascular and Metabolic Research , University of Reading, School of Biological Sciences , Reading , UK
| | - Ashley A Osborne
- a Institute for Cardiovascular and Metabolic Research , University of Reading, School of Biological Sciences , Reading , UK
| | - Dillon Donaghy
- b Department of Microbiology Immunology and Pathology , Colorado State University , Fort Collins , CO , USA
| | - Jonathan M Gibbins
- a Institute for Cardiovascular and Metabolic Research , University of Reading, School of Biological Sciences , Reading , UK
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Razidlo GL, Burton KM, McNiven MA. Interleukin-6 promotes pancreatic cancer cell migration by rapidly activating the small GTPase CDC42. J Biol Chem 2018; 293:11143-11153. [PMID: 29853638 DOI: 10.1074/jbc.ra118.003276] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/21/2018] [Indexed: 02/03/2023] Open
Abstract
Inflammation is a major driver of tumor progression and metastasis, although the mechanisms by which proinflammatory cytokines drive metastatic invasion are unknown. Interleukin-6 (IL-6) is a potent proinflammatory cytokine that is elevated in individuals with pancreatic cancer (PDAC), is required for PDAC progression in mice, and increases tumor cell invasion in vitro Here, we provide insights into the mechanisms by which IL-6 activates tumor cell invasion. We found that IL-6 stimulation rapidly and robustly activates the small GTPase cell division cycle 42 (CDC42) in human PDAC cells and promotes the formation of premigratory filopodia. The CDC42 activation was required for IL-6-induced invasion as blocking CDC42 activity rendered the cells insensitive to IL-6's proinvasive effects. Loss of Janus kinase 2 (JAK2) or signal transducer and activator of transcription 3 (STAT3) prevented IL-6-mediated CDC42 activation, indicating that IL-6 activates CDC42 through both JAK2 and STAT3. However, the rapid activation of CDC42 suggested that this activation may be distinct from canonical STAT3-mediated transcriptional activation. Importantly, we observed an interaction between STAT3 and IQ motif-containing GTPase-activating protein 1 (IQGAP1), a scaffolding platform that binds CDC42. STAT3 colocalized with CDC42 and IQGAP1 at the plasma membrane, suggesting cross-talk between IL-6-mediated STAT3 signaling and CDC42 activation. These results suggest that IL-6 promotes metastatic invasion, at least partially, through CDC42 and that, along with its pleiotropic effects on tumor growth and progression, IL-6 signaling also activates proinvasive GTPase signaling, priming tumor cells for metastatic invasion.
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Affiliation(s)
- Gina L Razidlo
- From the Division of Gastroenterology and Hepatology, .,Department of Biochemistry and Molecular Biology, and
| | - Kevin M Burton
- Department of Biochemistry and Molecular Biology, and.,Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, Minnesota 55905
| | - Mark A McNiven
- From the Division of Gastroenterology and Hepatology.,Department of Biochemistry and Molecular Biology, and
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Cathelicidins prime platelets to mediate arterial thrombosis and tissue inflammation. Nat Commun 2018; 9:1523. [PMID: 29670076 PMCID: PMC5906636 DOI: 10.1038/s41467-018-03925-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 03/23/2018] [Indexed: 12/14/2022] Open
Abstract
Leukocyte-released antimicrobial peptides contribute to pathogen elimination and activation of the immune system. Their role in thrombosis is incompletely understood. Here we show that the cathelicidin LL-37 is abundant in thrombi from patients with acute myocardial infarction. Its mouse homologue, CRAMP, is present in mouse arterial thrombi following vascular injury, and derives mainly from circulating neutrophils. Absence of hematopoietic CRAMP in bone marrow chimeric mice reduces platelet recruitment and thrombus formation. Both LL-37 and CRAMP induce platelet activation in vitro by involving glycoprotein VI receptor with downstream signaling through protein tyrosine kinases Src/Syk and phospholipase C. In addition to acute thrombosis, LL-37/CRAMP-dependent platelet activation fosters platelet–neutrophil interactions in other inflammatory conditions by modulating the recruitment and extravasation of neutrophils into tissues. Absence of CRAMP abrogates acid-induced lung injury, a mouse pneumonia model that is dependent on platelet–neutrophil interactions. We suggest that LL-37/CRAMP represents an important mediator of platelet activation and thrombo-inflammation. Cathelicidins are antimicrobial peptides that eliminate pathogens and contribute to the innate immune response. Here the authors show that neutrophil-derived LL-37/CRAMP induces platelet activation and promotes arterial thrombosis and thrombo-inflammation.
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Schwertz H, Rowley JW, Zimmerman GA, Weyrich AS, Rondina MT. Retinoic acid receptor-α regulates synthetic events in human platelets. J Thromb Haemost 2017; 15:2408-2418. [PMID: 28981191 DOI: 10.1111/jth.13861] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Indexed: 12/01/2022]
Abstract
Essentials Platelets express retinoic acid receptor (RAR)α protein, specifically binding target mRNAs. mRNAs under RARα control include MAP1LC3B2, SLAIN2, and ANGPT1. All-trans retinoic acid (atRA) releases RARα from its target mRNA. RARα expressed in human platelets exerts translational control via direct mRNA binding. SUMMARY Background Translational control mechanisms in platelets are incompletely defined. Here, we determined whether the nuclear transcription factor RARα controls protein translational events in human platelets. Methods Isolated human platelets were treated with the pan-RAR agonist all-trans-retinoic acid (atRA). Global and targeted translational events were examined. Results Stimulation of platelets with atRA significantly increased global protein expression. RARα protein bound to a subset of platelet mRNAs, as measured by next-generation RNA-sequencing. In-depth analyses of 5' and 3'-untranslated regions of the RARα-bound mRNAs revealed consensus RARα binding sites in microtubule-associated protein 1 light chain 3 beta 2 (MAP1LC3B2), SLAIN motif-containing protein 2 (SLAIN2) and angiopoietin-1 (ANGPT1) transcripts. When platelets were treated with atRA, binding interactions between RARα protein and mRNA for MAP1LC3B2, SLAIN2 and ANGPT1 were significantly decreased. Consistent with the release of bound RARα protein from MAP1LCB2mRNA, we observed an increase in the synthesis of MAP1LC3B2 protein. Conclusions These findings provide the first evidence that RARα, a nuclear transcriptional factor, regulates synthetic events in anucleate human platelets. They also reveal an additional non-genomic role for RARα in platelets that may have implications for the vitamin A-dependent signaling in humans.
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Affiliation(s)
- H Schwertz
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Departments of Surgery, University of Utah, Salt Lake City, UT, USA
| | - J W Rowley
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - G A Zimmerman
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - A S Weyrich
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - M T Rondina
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Internal Medicine, University of Utah, Salt Lake City, UT, USA
- The Geriatric Research Education and Clinical Center (GRECC), University of Utah, Salt Lake City, UT, USA
- Department of Internal Medicine at the George E. Wahlen Salt Lake City VAMC, Salt Lake City, Utah, USA
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Aleva FE, van de Veerdonk FL, Li Y, Tunjungputri RN, Simons S, De Groot PG, Netea MM, Heijdra YF, de Mast Q, van der Ven AJAM. The effects of signal transducer and activator of transcription three mutations on human platelets. Platelets 2017; 29:602-609. [PMID: 28960117 DOI: 10.1080/09537104.2017.1349309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Involvement of signal transducer and activator of transcription 3 (STAT3) in inflammation is well known. Recently, a role for STAT3 in platelet activation and platelet production has been suggested. Platelets exhibit important immune functions and engagement of STAT3 in platelet physiology may link inflammation and hemostasis. This study investigated the effects of STAT3 loss-of-function mutations and single nucleotide polymorphisms (SNPs) in STAT3 on glycoprotein VI (GPVI)-mediated platelet activation and platelet numbers in humans. Two cohorts were studied. The first cohort concerned patients with STAT3 loss-of-function mutations. Platelet numbers were investigated in eight patients and GPVI-mediated platelet activation was functionally tested in four patients. Additional experiments were performed to investigate underlying mechanisms. The second cohort concerned 334 healthy volunteers and investigated the consequences of SNPs in STAT3 on GPVI-mediated platelet activation and platelet numbers. Platelet activation was lower in STAT3 loss-of-function patients at baseline and after stimulation of the GPVI receptor, reflected by decreased P-selectin expression. This was independent of gene transcription. Blockade of the adenosine di-phosphate (ADP) pathway resulted in a further decrease of P-selectin expression, particularly in STAT3 loss-of-function patients. In contrast, the SNPs in STAT3 did not influence GPVI-mediated platelet activation. Also, platelet numbers were not affected by STAT3 loss-of-function mutations, nor was there an association with the SNPs. In conclusion, STAT3 signaling does not seem to play a major role in thrombopoiesis. We confirm that STAT3 is involved in GPVI-mediated platelet activation in humans, independent of gene transcription. GPVI-mediated platelet activation is highly dependent on secondary ADP release. Our findings suggest that STAT3 modulation may affect inflammation, hemostasis, and their interaction.
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Affiliation(s)
- Floor E Aleva
- a Department of Respiratory Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Frank L van de Veerdonk
- b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Yang Li
- d Department of Genetics , University Medical Center Groningen , Nijmegen , the Netherlands
| | - Rahajeng N Tunjungputri
- b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Sami Simons
- a Department of Respiratory Medicine , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Philip G De Groot
- b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Mihai M Netea
- b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Yvonne F Heijdra
- a Department of Respiratory Medicine , Radboud University Medical Center , Nijmegen , the Netherlands
| | - Quirijn de Mast
- b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
| | - André J A M van der Ven
- b Department of Internal Medicine , Radboud University Medical Center , Nijmegen , the Netherlands.,c Radboud Center for Infectious Diseases , Radboud University Medical Center , Nijmegen , the Netherlands
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Xu Z, Xu YJ, Hao YN, Ren LJ, Zhang ZB, Xu X, Cao BY, Dai KS, Zhu L, Fang Q, Kong Y, Mao XL. A novel STAT3 inhibitor negatively modulates platelet activation and aggregation. Acta Pharmacol Sin 2017; 38:651-659. [PMID: 28260800 DOI: 10.1038/aps.2016.155] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 11/14/2016] [Indexed: 12/12/2022] Open
Abstract
The signal transducer and activator of transcription 3 (STAT3) plays a critical role in platelet functions. This study sought to understand the effects of the STAT3 inhibitor SC99 on platelet activation and aggregation. Immunoblotting assays were applied to measure the effects of SC99 on the STAT3 signaling pathway. A ChronoLog aggregometer was used to evaluate platelet aggregation. A flow cytometer was used to evaluate P-selectin expression in the presence of SC99. AlamarBlue and Annexin-V staining were used to evaluate platelet viability and apoptosis, respectively. A fluorescence microscope was applied to analyze platelet spreading. SC99 inhibited the phosphorylation of JAK2 and STAT3 in human platelets but had no effects on the phosphorylation of AKT, p65 or Src, all of which are involved in platelet activation. Further studies revealed that SC99 inhibited human platelet aggregation induced by collagen and thrombin in a dose-dependent manner. SC99 inhibited thrombin-induced P-selectin expression and fibrinogen binding to single platelets. Moreover, SC99 inhibited platelet spreading on fibrinogen and clot retraction mediated by outside-in signaling. SC99 inhibited platelet aggregation in mice but it did not significantly prolong the bleeding time. Taken together, the present study revealed that SC99 inhibited platelet activation and aggregation as a STAT3 inhibitor. This agent can be developed as a promising treatment for thrombotic disorders.
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Nhek S, Clancy R, Lee KA, Allen NM, Barrett TJ, Marcantoni E, Nwaukoni J, Rasmussen S, Rubin M, Newman JD, Buyon JP, Berger JS. Activated Platelets Induce Endothelial Cell Activation via an Interleukin-1β Pathway in Systemic Lupus Erythematosus. Arterioscler Thromb Vasc Biol 2017; 37:707-716. [PMID: 28153882 DOI: 10.1161/atvbaha.116.308126] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 01/20/2017] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Systemic lupus erythematosus (SLE) is associated with the premature development of cardiovascular disease. The platelet-endothelium interaction is important in the pathogenesis of cardiovascular disease. In this study, we investigated the platelet phenotype from patients with SLE and matched controls, and their effect on endothelial cells. APPROACH AND RESULTS Platelet aggregability was measured in 54 SLE subjects off antiplatelet therapy (mean age 40.1±12.8 years; 82% female; 37% white) with age- and sex-matched controls. Platelets were coincubated with human umbilical vein endothelial cells (HUVECs) and changes to gene expression assessed by an RNA array and quantitative reverse transcription polymerase chain reaction. SLE disease activity index ranged from 0 to 22 (mean 5.1±3.9). Compared with controls, patients with SLE had significantly increased monocyte and leukocyte-platelet aggregation and platelet aggregation in response to submaximal agonist stimulation. An agnostic microarray of HUVECs cocultured with SLE platelets found a platelet-mediated effect on endothelial gene pathways involved in cell activation. Sera from SLE versus control subjects significantly increased (1) activation of control platelets; (2) platelet adhesion to HUVECs; (3) platelet-induced HUVEC gene expression of interleukin-8, and intercellular adhesion molecule 1; and (4) proinflammatory gene expression in HUVECs, mediated by interleukin-1β-dependent pathway. Incubation of SLE-activated platelets with an interleukin-1β-neutralizing antibody or HUVECs pretreated with interleukin-1 receptor antibodies attenuated the platelet-mediated activation of endothelial cells. CONCLUSIONS Platelet activity measurements and subsequent interleukin-1β-dependent activation of the endothelium are increased in subjects with SLE. Platelet-endothelial interactions may play a role in the pathogenesis of cardiovascular disease in patients with SLE.
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Affiliation(s)
- Sokha Nhek
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Robert Clancy
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Kristen A Lee
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Nicole M Allen
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Tessa J Barrett
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Emanuela Marcantoni
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Janet Nwaukoni
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Sara Rasmussen
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Maya Rubin
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Jonathan D Newman
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Jill P Buyon
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York
| | - Jeffrey S Berger
- From the Department of Medicine, Divisions of Cardiology (S.N., K.A.L., N.M.A., T.J.B., E.M., M.R., J.D.N., J.S.B.), Hematology (J.S.B.), and Rheumatology (R.C., J.N., S.R., J.P.B.), New York University School of Medicine, New York.
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Downstream Regulatory Element Antagonist Modulator (DREAM), a target for anti-thrombotic agents. Pharmacol Res 2017; 117:283-287. [PMID: 28065857 DOI: 10.1016/j.phrs.2017.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 01/03/2017] [Indexed: 11/21/2022]
Abstract
Circulating platelets participate in the process of numerous diseases including thrombosis, inflammation, and cancer. Thus, it is of great importance to understand the underlying mechanisms mediating platelet activation under disease conditions. Emerging evidence indicates that despite the lack of a nucleus, platelets possess molecules that are involved in gene transcription in nucleated cells. This review will summarize downstream regulatory element antagonist modulator (DREAM), a transcriptional repressor, and highlight recent findings suggesting its novel non-transcriptional role in hemostasis and thrombosis.
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DREAM plays an important role in platelet activation and thrombogenesis. Blood 2016; 129:209-225. [PMID: 27903531 DOI: 10.1182/blood-2016-07-724419] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 11/23/2016] [Indexed: 01/18/2023] Open
Abstract
Downstream regulatory element antagonist modulator (DREAM), a transcriptional repressor, is known to modulate pain responses. However, it is unknown whether DREAM is expressed in anucleate platelets and plays a role in thrombogenesis. By using intravital microscopy with DREAM-null mice and their bone marrow chimeras, we demonstrated that both hematopoietic and nonhematopoietic cell DREAMs are required for platelet thrombus formation following laser-induced arteriolar injury. In a FeCl3-induced thrombosis model, we found that compared with wild-type (WT) control and nonhematopoietic DREAM knockout (KO) mice, DREAM KO control and hematopoietic DREAM KO mice showed a significant delay in time to occlusion. Tail bleeding time was prolonged in DREAM KO control mice, but not in WT or DREAM bone marrow chimeric mice. In vivo adoptive transfer experiments further indicated the importance of platelet DREAM in thrombogenesis. We found that DREAM deletion does not alter the ultrastructural features of platelets but significantly impairs platelet aggregation and adenosine triphosphate secretion induced by numerous agonists (collagen-related peptide, adenosine 5'-diphosphate, A23187, thrombin, or U46619). Biochemical studies revealed that platelet DREAM positively regulates phosphoinositide 3-kinase (PI3K) activity during platelet activation. Using DREAM-null platelets and PI3K isoform-specific inhibitors, we observed that platelet DREAM is important for α-granule secretion, Ca2+ mobilization, and aggregation through PI3K class Iβ (PI3K-Iβ). Genetic and pharmacological studies in human megakaryoblastic MEG-01 cells showed that DREAM is important for A23187-induced Ca2+ mobilization and its regulatory function requires Ca2+ binding and PI3K-Iβ activation. These results suggest that platelet DREAM regulates PI3K-Iβ activity and plays an important role during thrombus formation.
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Zimmers TA, Fishel ML, Bonetto A. STAT3 in the systemic inflammation of cancer cachexia. Semin Cell Dev Biol 2016; 54:28-41. [PMID: 26860754 PMCID: PMC4867234 DOI: 10.1016/j.semcdb.2016.02.009] [Citation(s) in RCA: 156] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/04/2016] [Indexed: 02/07/2023]
Abstract
Weight loss is diagnostic of cachexia, a debilitating syndrome contributing mightily to morbidity and mortality in cancer. Most research has probed mechanisms leading to muscle atrophy and adipose wasting in cachexia; however cachexia is a truly systemic phenomenon. Presence of the tumor elicits an inflammatory response and profound metabolic derangements involving not only muscle and fat, but also the hypothalamus, liver, heart, blood, spleen and likely other organs. This global response is orchestrated in part through circulating cytokines that rise in conditions of cachexia. Exogenous Interleukin-6 (IL6) and related cytokines can induce most cachexia symptomatology, including muscle and fat wasting, the acute phase response and anemia, while IL-6 inhibition reduces muscle loss in cancer. Although mechanistic studies are ongoing, certain of these cachexia phenotypes have been causally linked to the cytokine-activated transcription factor, STAT3, including skeletal muscle wasting, cardiac dysfunction and hypothalamic inflammation. Correlative studies implicate STAT3 in fat wasting and the acute phase response in cancer cachexia. Parallel data in non-cancer models and disease states suggest both pathological and protective functions for STAT3 in other organs during cachexia. STAT3 also contributes to cancer cachexia through enhancing tumorigenesis, metastasis and immune suppression, particularly in tumors associated with high prevalence of cachexia. This review examines the evidence linking STAT3 to multi-organ manifestations of cachexia and the potential and perils for targeting STAT3 to reduce cachexia and prolong survival in cancer patients.
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Affiliation(s)
- Teresa A Zimmers
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States; Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IU Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IUPUI Center for Cachexia Research Innovation and Therapy, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
| | - Melissa L Fishel
- IU Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, United States; Department of Pediatrics, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, United States; Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
| | - Andrea Bonetto
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IU Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, United States; IUPUI Center for Cachexia Research Innovation and Therapy, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
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da Motta NAV, de Brito FCF. Cilostazol exerts antiplatelet and anti-inflammatory effects through AMPK activation and NF-kB inhibition on hypercholesterolemic rats. Fundam Clin Pharmacol 2016; 30:327-37. [PMID: 26950185 DOI: 10.1111/fcp.12195] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 03/01/2016] [Accepted: 03/04/2016] [Indexed: 12/16/2022]
Abstract
This work presents a model of rats fed a high-cholesterol diet, receiving a long-term oral administration of cilostazol, a PDE3-inhibitor. The aim of this study was to evaluate the molecular mechanisms by which cilostazol interferes with platelets signaling pathways to avoid atherosclerosis early development. Male Wistar rats were divided into 3 groups: Control group received standard rat chow (C), hypercholesterolemic group (HCD), and HCD+CIL (cilostazol group) received hypercholesterolemic diet for 45 days. HCD+CIL group received cilostazol (30 mg/kg/p.o.) once daily in the last 15 days. Platelet aggregation, lipid profile, lipid peroxidation, and cytokine serum levels were assessed. Expression of P-selectin, CD40L, PKC-α, IkB-α, and iNOS and activation of AMPK, NF-κB, and eNOS in the platelets were assessed using Western blot analysis. Cilostazol reduced the levels of total cholesterol (361.0 ± 12.8 vs. 111.5 ± 1.6 mg/dL), triglycerides (186.9 ± 17.7 vs. 55.4 ±3.1 mg/dL), cLDL (330.9 ± 9.7 vs. 61.5 ± 3.5 mg/dL), cVLDL (45.0 ± 4.6 vs. 11.1 ± 0.6 mg/dL), and malondialdehyde (9.4 ± 0.5 vs. 3.2 ± 0.3 nmol/mL) compared to the HCD group. Cilostazol presented antiplatelet properties and decreased inflammatory markers levels. These effects seem to be related to AMPK activation, NF-kB inhibition, and eNOS activation.
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Affiliation(s)
- Nadia Alice Vieira da Motta
- Departamento de Fisiologia e Farmacologia, Laboratório de Farmacologia Experimental (LAFE), Instituto Biomédico, Universidade Federal Fluminense (UFF), Sala 204-A, 24230-210, Niterói, Rio de Janeiro, Brazil
| | - Fernanda Carla Ferreira de Brito
- Departamento de Fisiologia e Farmacologia, Laboratório de Farmacologia Experimental (LAFE), Instituto Biomédico, Universidade Federal Fluminense (UFF), Sala 204-A, 24230-210, Niterói, Rio de Janeiro, Brazil
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Yuan H, Houck KL, Tian Y, Bharadwaj U, Hull K, Zhou Z, Zhou M, Wu X, Tweardy DJ, Romo D, Fu X, Zhang Y, Zhang J, Dong JF. Piperlongumine Blocks JAK2-STAT3 to Inhibit Collagen-Induced Platelet Reactivity Independent of Reactive Oxygen Species. PLoS One 2015; 10:e0143964. [PMID: 26645674 PMCID: PMC4672935 DOI: 10.1371/journal.pone.0143964] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 11/11/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Piperlongumine (PL) is a compound isolated from the piper longum plant. It possesses anti-cancer activities through blocking the transcription factor STAT3 and by inducing reactive oxygen species (ROS) in cancer, but not normal cells. It also inhibits platelet aggregation induced by collagen, but the underlying mechanism is not known. OBJECTIVE We conducted in vitro experiments to test the hypothesis that PL regulates a non-transcriptional activity of STAT3 to specifically reduce the reactivity of human platelets to collagen. RESULTS PL dose-dependently blocked collagen-induced platelet aggregation, calcium influx, CD62p expression and thrombus formation on collagen with a maximal inhibition at 100 μM. It reduced platelet microvesiculation induced by collagen. PL blocked the activation of JAK2 and STAT3 in collagen-stimulated platelets. This inhibitory effect was significantly reduced in platelets pretreated with a STAT3 inhibitor. Although PL induced ROS production in platelets; quenching ROS using excessive reducing agents: 20 μM GSH and 0.5 mM L-Cysteine, did not block the inhibitory effects. The NADPH oxidase inhibitor Apocynin also had no effect. CONCLUSIONS PL inhibited collagen-induced platelet reactivity by targeting the JAK2-STAT3 pathway. We also provide experimental evidence that PL and collagen induce different oxidants that have differential effects on platelets. Studying these differential effects may uncover new mechanisms of regulating platelet functions by oxidants in redox signals.
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Affiliation(s)
- Hengjie Yuan
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
- Tianjin Neurological Institute, General Hospital, Tianjin Medical University, Tianjin, China
| | - Katie L. Houck
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
| | - Ye Tian
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
- Tianjin Neurological Institute, General Hospital, Tianjin Medical University, Tianjin, China
| | - Uddalak Bharadwaj
- Division of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, Texas, United States of America
| | - Ken Hull
- The Natural Products LINCHPIN Laboratory and Department of Chemistry, Texas A & M University, College Station, Texas, United States of America
| | - Zhou Zhou
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
| | - Mingzhao Zhou
- The Natural Products LINCHPIN Laboratory and Department of Chemistry, Texas A & M University, College Station, Texas, United States of America
| | - Xiaoping Wu
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
| | - David J. Tweardy
- Division of Infectious Disease, Department of Medicine, Baylor College of Medicine, Houston, Texas, United States of America
| | - Daniel Romo
- The Natural Products LINCHPIN Laboratory and Department of Chemistry, Texas A & M University, College Station, Texas, United States of America
| | - Xiaoyun Fu
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
- Division of Hematology, Department of Medicine, University of Washington, School of Medicine, Seattle, Washington, United States of America
| | - Yanjun Zhang
- Medicine Division, Imperial College London, London, United Kingdom
| | - Jianning Zhang
- Tianjin Neurological Institute, General Hospital, Tianjin Medical University, Tianjin, China
| | - Jing-fei Dong
- Bloodworks Northwest Research Institute, Seattle, Washington, United States of America
- Division of Hematology, Department of Medicine, University of Washington, School of Medicine, Seattle, Washington, United States of America
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Aslan JE, Rigg RA, Nowak MS, Loren CP, Baker-Groberg SM, Pang J, David LL, McCarty OJT. Lysine acetyltransfer supports platelet function. J Thromb Haemost 2015; 13:1908-17. [PMID: 26256950 PMCID: PMC4752848 DOI: 10.1111/jth.13070] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 07/28/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND OBJECTIVES The reversible acetylation of protein lysine ε-amino groups, catalyzed by lysine acetyltransferases and deacetylases, serves as a molecular switch in the orchestration of diverse cellular activities. Here, we aimed to investigate the role of lysine acetyltransfer in platelet function. METHODS AND RESULTS Proteomics methods identified 552 acetyllysine (acK) modifications on 273 platelet proteins that serve as candidate substrates for lysine acetyltransferases. Bioinformatics analyses of the identified acK-modified platelet proteins supported roles for the lysine acetyltransferase p300 in the regulation of actin-mediated platelet processes. Biochemical experiments showed that platelets express p300, which is activated in an Src kinase-dependent manner upon platelet stimulation with the platelet glycoprotein VI agonist collagen-related peptide (CRP). Inhibition of platelet p300 abrogated CRP-stimulated lysine acetylation of actin, filamin, and cortactin, as well as F-actin polymerization, integrin activation, and platelet aggregation. Super-resolution visualization of platelet actin-rich adhesion structures revealed abundant acK protein colocalized with platelet actin cytoskeletal proteins. Inhibition of p300 blocked platelet filopodium formation and the spreading of platelets on fibrinogen and collagen surfaces. In whole blood, p300 inhibition prevented the formation of platelet aggregates under shear, suggesting a physiologic role for lysine acetyltransferase activity in platelet function. CONCLUSION Together, our findings reveal lysine acetyltransfer to be a potential regulator of platelet actin dynamics, and potential roles for lysine acetylation in the molecular coordination of platelet activation and function.
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Affiliation(s)
- Joseph E. Aslan
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
- Cell and Developmental Biology, Oregon Health & Science University, Portland, OR 97239, USA
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR 97239, USA
| | - Rachel A. Rigg
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
| | - Marie S. Nowak
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
- Department of Medical Physics, Universite des Sciences et Technologies de Lille, Villeneuve d'Ascq Cedex, France
| | - Cassandra P. Loren
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
| | - Sandra M. Baker-Groberg
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
| | - Jiaqing Pang
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
| | - Larry L. David
- Proteomics Shared Resource, Oregon Health & Science University, Portland, OR 97239, USA
| | - Owen J. T. McCarty
- Departments of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA
- Cell and Developmental Biology, Oregon Health & Science University, Portland, OR 97239, USA
- Division of Hematology & Medical Oncology School of Medicine, Oregon Health & Science University, Portland, OR 97239, USA
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Turton KB, Annis DS, Rui L, Esnault S, Mosher DF. Ratios of Four STAT3 Splice Variants in Human Eosinophils and Diffuse Large B Cell Lymphoma Cells. PLoS One 2015; 10:e0127243. [PMID: 25984943 PMCID: PMC4436176 DOI: 10.1371/journal.pone.0127243] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 04/13/2015] [Indexed: 01/09/2023] Open
Abstract
Signal transducer and activator of transcription 3 (STAT3) is a key mediator of leukocyte differentiation and proliferation. The 3' end of STAT3 transcripts is subject to two alternative splicing events. One results in either full-length STAT3α or in STAT3β, which lacks part of the C-terminal transactivation domain. The other is at a tandem donor (5') splice site and results in the codon for Ser-701 being included (S) or excluded (ΔS). Despite the proximity of Ser-701 to the site of activating phosphorylation at Tyr-705, ΔS/S splicing has barely been studied. Sequencing of cDNA from purified eosinophils revealed the presence of four transcripts (S-α, ΔS-α, S-β, and ΔS-β) rather than the three reported in publically available databases from which ΔS-β is missing. To gain insight into regulation of the two alternative splicing events, we developed a quantitative(q) PCR protocol to compare transcript ratios in eosinophils in which STAT3 is upregulated by cytokines, activated B cell diffuse large B cell Lymphoma (DLBCL) cells in which STAT3 is dysregulated, and in germinal center B cell-like DLBCL cells in which it is not. With the exception of one line of activated B cell DLCBL cells, the four variants were found in roughly the same ratios despite differences in total levels of STAT3 transcripts. S-α was the most abundant, followed by S-β. ΔS-α and ΔS-β together comprised 15.6±4.0 % (mean±SD, n=21) of the total. The percentage of STAT3β variants that were ΔS was 1.5-fold greater than of STAT3α variants that were ΔS. Inspection of Illumina’s “BodyMap” RNA-Seq database revealed that the ΔS variant accounts for 10-26 % of STAT3 transcripts across 16 human tissues, with less variation than three other genes with the identical tandem donor splice site sequence. Thus, it seems likely that all cells contain the S-α, ΔS-α, S-β, and ΔS-β variants of STAT3.
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Affiliation(s)
- Keren B. Turton
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, United States of America
| | - Douglas S. Annis
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, United States of America
| | - Lixin Rui
- Department of Medicine at University of Wisconsin-Madison, Madison, WI, United States of America
| | - Stephane Esnault
- Department of Medicine at University of Wisconsin-Madison, Madison, WI, United States of America
| | - Deane F. Mosher
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, United States of America
- Department of Medicine at University of Wisconsin-Madison, Madison, WI, United States of America
- * E-mail:
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Inflammasome in platelets: allying coagulation and inflammation in infectious and sterile diseases? Mediators Inflamm 2015; 2015:435783. [PMID: 25814789 PMCID: PMC4357129 DOI: 10.1155/2015/435783] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 01/24/2015] [Accepted: 01/26/2015] [Indexed: 12/27/2022] Open
Abstract
Platelets are crucial effector cells in hemostasis. In addition, platelets are increasingly recognized as major inflammatory cells with key roles in innate and adaptive immune responses. Activated platelets have key thromboinflammatory activities linking coagulation to inflammatory response in a variety of coagulation disorders and vasculopathies. Recently identified inflammatory activities of platelets include the synthesis of IL-1β from spliced pre-RNA, as well as the presence and assembly of inflammasome which intermediate IL-1β secretion. Here we review the mechanisms by which platelets activate translation machinery and inflammasome assembly to synthesize and release IL-1β. The contributions of these processes to protective and pathogenic responses during infectious and inflammatory diseases are discussed.
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Lannan KL, Sahler J, Kim N, Spinelli SL, Maggirwar SB, Garraud O, Cognasse F, Blumberg N, Phipps RP. Breaking the mold: transcription factors in the anucleate platelet and platelet-derived microparticles. Front Immunol 2015; 6:48. [PMID: 25762994 PMCID: PMC4327621 DOI: 10.3389/fimmu.2015.00048] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/26/2015] [Indexed: 01/15/2023] Open
Abstract
Platelets are small anucleate blood cells derived from megakaryocytes. In addition to their pivotal roles in hemostasis, platelets are the smallest, yet most abundant, immune cells and regulate inflammation, immunity, and disease progression. Although platelets lack DNA, and thus no functional transcriptional activities, they are nonetheless rich sources of RNAs, possess an intact spliceosome, and are thus capable of synthesizing proteins. Previously, it was thought that platelet RNAs and translational machinery were remnants from the megakaryocyte. We now know that the initial description of platelets as "cellular fragments" is an antiquated notion, as mounting evidence suggests otherwise. Therefore, it is reasonable to hypothesize that platelet transcription factors are not vestigial remnants from megakaryocytes, but have important, if only partly understood functions. Proteins play multiple cellular roles to minimize energy expenditure for maximum cellular function; thus, the same can be expected for transcription factors. In fact, numerous transcription factors have non-genomic roles, both in platelets and in nucleated cells. Our lab and others have discovered the presence and non-genomic roles of transcription factors in platelets, such as the nuclear factor kappa β (NFκB) family of proteins and peroxisome proliferator-activated receptor gamma (PPARγ). In addition to numerous roles in regulating platelet activation, functional transcription factors can be transferred to vascular and immune cells through platelet microparticles. This method of transcellular delivery of key immune molecules may be a vital mechanism by which platelet transcription factors regulate inflammation and immunity. At the very least, platelets are an ideal model cell to dissect out the non-genomic roles of transcription factors in nucleated cells. There is abundant evidence to suggest that transcription factors in platelets play key roles in regulating inflammatory and hemostatic functions.
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Affiliation(s)
- Katie L Lannan
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | - Julie Sahler
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA ; Department of Biological and Environmental Engineering, Cornell University , Ithaca, NY , USA
| | - Nina Kim
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | - Sherry L Spinelli
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | - Sanjay B Maggirwar
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | - Olivier Garraud
- Faculté de Médecine, Université de Lyon , Saint-Etienne , France
| | - Fabrice Cognasse
- Faculté de Médecine, Université de Lyon , Saint-Etienne , France ; Etablissement Français du Sang Auvergne-Loire , Saint-Etienne , France
| | - Neil Blumberg
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
| | - Richard P Phipps
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA ; Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA ; Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry , Rochester, NY , USA
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Lu WJ, Lin KC, Huang SY, Thomas PA, Wu YH, Wu HC, Lin KH, Sheu JR. Role of a Janus kinase 2-dependent signaling pathway in platelet activation. Thromb Res 2014; 133:1088-96. [PMID: 24731555 DOI: 10.1016/j.thromres.2014.03.042] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 03/12/2014] [Accepted: 03/26/2014] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Janus kinases (JAKs) are intracellular non-receptor tyrosine kinases that transduce cytokine-mediated signals through a pathway mediated by JAK and the signal transducer and activator of transcription (STAT) proteins. The JAK-STAT pathway is involved in immune response, inflammation, and tumorigenesis. Platelets are anuclear blood cells that play a central role in hemostasis. METHODS The aggregometry, immunoblotting, and platelet functional analysis used in this study. RESULTS We found that the JAK2 inhibitor AG490 (25 and 50μM) attenuated collagen-induced platelet aggregation and calcium mobilization in a concentration-dependent manner. In the presence of AG490, the phosphorylation of PLCγ2, protein kinase C (PKC), Akt or JNK in collagen-activated aggregation of human platelets was also inhibited. In addition, we found that various inhibitors, such as the PLCγ2 inhibitor U73122, the PKC inhibitor Ro318220, the phospoinositide 3-kinase inhibitor LY294002, the p38 mitogen-activated protein kinase inhibitor SB203580, the ERK inhibitor PD98059, and the JNK inhibitor SP600125, had no effects on collagen-induced JAK2 activity. However, U73122, Ro318220 and SP600125 significantly diminished collagen-induced STAT3 phosphorylation. These findings suggest that PLCγ2-PKC and JNK are involved in JAK2-STAT3 signaling in collagen-activated platelets. CONCLUSION Our results demonstrate that the JAK2-STAT3 pathway is involved in collagen-induced platelet activation through the activation of JAK2-JNK/PKC-STAT3 signaling. The inhibition of JAK2 may represent a potential therapeutic strategy for the preventing or treating thromboembolic disorders.
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Affiliation(s)
- Wan-Jung Lu
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei, Taiwan; School of Nutrition and Health Sciences, Taipei Medical University, Taipei, Taiwan
| | - Kao-Chang Lin
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Neurology, Chi Mei Medical Center, Tainan, Taiwan
| | - Shih-Yi Huang
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei, Taiwan
| | - Philip Aloysius Thomas
- Department of Microbiology, Institute of Ophthalmology, Joseph Eye Hospital, Tiruchirappalli, Tamil Nadu, India
| | - Yu-Hua Wu
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hsu-Chu Wu
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Kuan-Hung Lin
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei, Taiwan; Central Laboratory, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.
| | - Joen-Rong Sheu
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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Boulaftali Y, Hess PR, Kahn ML, Bergmeier W. Platelet immunoreceptor tyrosine-based activation motif (ITAM) signaling and vascular integrity. Circ Res 2014; 114:1174-84. [PMID: 24677237 PMCID: PMC4000726 DOI: 10.1161/circresaha.114.301611] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 02/18/2014] [Indexed: 01/27/2023]
Abstract
Platelets are well-known for their critical role in hemostasis, that is, the prevention of blood loss at sites of mechanical vessel injury. Inappropriate platelet activation and adhesion, however, can lead to thrombotic complications, such as myocardial infarction and stroke. To fulfill its role in hemostasis, the platelet is equipped with various G protein-coupled receptors that mediate the response to soluble agonists such as thrombin, ADP, and thromboxane A2. In addition to G protein-coupled receptors, platelets express 3 glycoproteins that belong to the family of immunoreceptor tyrosine-based activation motif receptors: Fc receptor γ chain, which is noncovalently associated with the glycoprotein VI collagen receptor, C-type lectin 2, the receptor for podoplanin, and Fc receptor γII A, a low-affinity receptor for immune complexes. Although both genetic and chemical approaches have documented a critical role for platelet G protein-coupled receptors in hemostasis, the contribution of immunoreceptor tyrosine-based activation motif receptors to this process is less defined. Studies performed during the past decade, however, have identified new roles for platelet immunoreceptor tyrosine-based activation motif signaling in vascular integrity in utero and at sites of inflammation. The purpose of this review is to summarize recent findings on how platelet immunoreceptor tyrosine-based activation motif signaling controls vascular integrity, both in the presence and absence of mechanical injury.
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Affiliation(s)
- Yacine Boulaftali
- From the McAllister Heart Institute (Y.B., W.B.) and Department of Biochemistry and Biophysics (W.B.), University of North Carolina, Chapel Hill; and Department of Medicine and Division of Cardiology, University of Pennsylvania, Philadelphia (P.R.H., M.L.K.)
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50
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Böhmer FD, Friedrich K. Protein tyrosine phosphatases as wardens of STAT signaling. JAKSTAT 2014; 3:e28087. [PMID: 24778927 DOI: 10.4161/jkst.28087] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/03/2014] [Accepted: 02/03/2014] [Indexed: 02/07/2023] Open
Abstract
Signaling by signal transducers and activators of transcription (STATs) is controlled at many levels of the signaling cascade. Protein tyrosine phosphatases (PTPs) regulate STAT activation at several layers, including direct pSTAT dephosphorylation in both cytoplasm and nucleus. Despite the importance of this regulation mode, many aspects are still incompletely understood, e.g., the identity of PTPs acting on certain members of the STAT family. After a brief introduction into the STAT and PTP families, we discuss here the current knowledge on PTP mediated regulation of STAT activity, focusing on the interaction of individual STATs with specific PTPs. Finally, we highlight open questions and propose important tasks of future research.
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Affiliation(s)
- Frank-D Böhmer
- Institute of Molecular Cell Biology; CMB; Jena University Hospital; Jena, Germany
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