1
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Slater A, Khattak S, Thomas MR. GPVI inhibition: Advancing antithrombotic therapy in cardiovascular disease. EUROPEAN HEART JOURNAL. CARDIOVASCULAR PHARMACOTHERAPY 2024; 10:465-473. [PMID: 38453424 PMCID: PMC11323372 DOI: 10.1093/ehjcvp/pvae018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/08/2024] [Accepted: 03/05/2024] [Indexed: 03/09/2024]
Abstract
Glycoprotein (GP) VI (GPVI) plays a major role in thrombosis but not haemostasis, making it a promising antithrombotic target. The primary role of GPVI on the surface of platelets is a signalling receptor for collagen, which is one of the most potent thrombotic sub-endothelial components that is exposed by atherosclerotic plaque rupture. Inhibition of GPVI has therefore been investigated as a strategy for treatment and prevention of atherothrombosis, such as during stroke and acute coronary syndromes. A range of specific GPVI inhibitors have been characterized, and two of these inhibitors, glenzocimab and revacept, have completed Phase II clinical trials in ischaemic stroke. In this review, we summarize mechanisms of GPVI activation and the latest progress of clinically tested GPVI inhibitors, including their mechanisms of action. By focusing on what is known about GPVI activation, we also discuss whether alternate strategies could be used to target GPVI.
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Affiliation(s)
- Alexandre Slater
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, B15 2TT, Birmingham, UK
| | - Sophia Khattak
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, B15 2TT, Birmingham, UK
- Cardiology Department, Queen Elizabeth Hospital, University Hospitals Birmingham, B15 2GW, Birmingham, UK
| | - Mark R Thomas
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, B15 2TT, Birmingham, UK
- Cardiology Department, Queen Elizabeth Hospital, University Hospitals Birmingham, B15 2GW, Birmingham, UK
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2
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Huang R, Liu X, Kim J, Deng H, Deng M, Gui X, Chen H, Wu G, Xiong W, Xie J, Lewis C, Homsi J, Yang X, Zhang C, He Y, Lou Q, Smith C, John S, Zhang N, An Z, Zhang CC. LILRB3 Supports Immunosuppressive Activity of Myeloid Cells and Tumor Development. Cancer Immunol Res 2024; 12:350-362. [PMID: 38113030 PMCID: PMC10932818 DOI: 10.1158/2326-6066.cir-23-0496] [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: 06/14/2023] [Revised: 10/24/2023] [Accepted: 12/15/2023] [Indexed: 12/21/2023]
Abstract
The existing T cell-centered immune checkpoint blockade therapies have been successful in treating some but not all patients with cancer. Immunosuppressive myeloid cells, including myeloid-derived suppressor cells (MDSC), that inhibit antitumor immunity and support multiple steps of tumor development are recognized as one of the major obstacles in cancer treatment. Leukocyte Ig-like receptor subfamily B3 (LILRB3), an immune inhibitory receptor containing tyrosine-based inhibitory motifs (ITIM), is expressed solely on myeloid cells. However, it is unknown whether LILRB3 is a critical checkpoint receptor in regulating the activity of immunosuppressive myeloid cells, and whether LILRB3 signaling can be blocked to activate the immune system to treat solid tumors. Here, we report that galectin-4 and galectin-7 induce activation of LILRB3 and that LILRB3 is functionally expressed on immunosuppressive myeloid cells. In some samples from patients with solid cancers, blockade of LILRB3 signaling by an antagonistic antibody inhibited the activity of immunosuppressive myeloid cells. Anti-LILRB3 also impeded tumor development in myeloid-specific LILRB3 transgenic mice through a T cell-dependent manner. LILRB3 blockade may prove to be a novel approach for immunotherapy of solid cancers.
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Affiliation(s)
- Ryan Huang
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
- These authors contributed equally
| | - Xiaoye Liu
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
- These authors contributed equally
| | - Jaehyup Kim
- Department of Pathology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Hui Deng
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Mi Deng
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Xun Gui
- Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Heyu Chen
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Guojin Wu
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Wei Xiong
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Jingjing Xie
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Cheryl Lewis
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Jade Homsi
- Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Xing Yang
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Chengcheng Zhang
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Yubo He
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Qi Lou
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Caroline Smith
- Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Samuel John
- Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Ningyan Zhang
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Zhiqiang An
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Cheng Cheng Zhang
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
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3
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Xiang Z, Yin X, Wei L, Peng M, Zhu Q, Lu X, Guo J, Zhang J, Li X, Zou Y. LILRB4 Checkpoint for Immunotherapy: Structure, Mechanism and Disease Targets. Biomolecules 2024; 14:187. [PMID: 38397424 PMCID: PMC10887124 DOI: 10.3390/biom14020187] [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: 12/22/2023] [Revised: 01/26/2024] [Accepted: 02/01/2024] [Indexed: 02/25/2024] Open
Abstract
LILRB4, a myeloid inhibitory receptor belonging to the family of leukocyte immunoglobulin-like receptors (LILRs/LIRs), plays a pivotal role in the regulation of immune tolerance. LILRB4 primarily mediates suppressive immune responses by transmitting inhibitory signals through immunoreceptor tyrosine-based inhibitory motifs (ITIMs). This immune checkpoint molecule has gained considerable attention due to its potent regulatory functions. Its ability to induce effector T cell dysfunction and promote T suppressor cell differentiation has been demonstrated, indicating the therapeutic potential of LILRB4 for modulating excessive immune responses, particularly in autoimmune diseases or the induction of transplant tolerance. Additionally, through intervening with LILRB4 molecules, immune system responsiveness can be adjusted, representing significant value in areas such as cancer treatment. Thus, LILRB4 has emerged as a key player in addressing autoimmune diseases, transplant tolerance induction, and other medical issues. In this review, we provide a comprehensive overview of LILRB4, encompassing its structure, expression, and ligand molecules as well as its role as a tolerance receptor. By exploring the involvement of LILRB4 in various diseases, its significance in disease progression is emphasized. Furthermore, we propose that the manipulation of LILRB4 represents a promising immunotherapeutic strategy and highlight its potential in disease prevention, treatment and diagnosis.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Yizhou Zou
- Department of Immunology, Xiangya School of Medicine, Central South University, Changsha 410078, China; (Z.X.); (X.Y.); (L.W.); (M.P.); (Q.Z.); (X.L.); (J.G.); (J.Z.); (X.L.)
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4
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Deng R, Zhang L, Chen S, Li X, Xue B, Li H, Xu Y, Tian R, Liu Q, Wang L, Liu S, Yang D, Li P, Tang S, Zhu H. PZR suppresses innate immune response to RNA viral infection by inhibiting MAVS activation in interferon signaling mediated by RIG-I and MDA5. Antiviral Res 2024; 222:105797. [PMID: 38185222 DOI: 10.1016/j.antiviral.2024.105797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/09/2024]
Abstract
RNA viral infections seriously endanger human health. Src homology 2 (SH2) domain-containing protein tyrosine phosphatase 2 (SHP2) suppresses innate immunity against influenza A virus, and pharmacological inhibition of SHP2 provokes hepatic innate immunity. SHP2 binds and catalyzes tyrosyl dephosphorylation of protein zero-related (PZR), but the regulatory effect of PZR on innate immune response to viral infection is unclear. In this study, the transcription and protein level of PZR in host cells were found to be decreased with RNA viral infection, and high level of PZR was uncovered to inhibit interferon (IFN) signaling mediated by RIG-I and MDA5. Through localizing in mitochondria, PZR targeted and interacted with MAVS (also known as IPS-1/VISA/Cardif), suppressing the aggregation and activation of MAVS. Specifically, Y263 residue in ITIM is critical for PZR to exert immunosuppression under RNA viral infection. Moreover, the recruited SHP2 by PZR that modified with tyrosine phosphorylation under RNA viral infection might inhibit phosphorylation activation of MAVS. In conclusion, PZR and SHP2 suppress innate immune response to RNA viral infection through inhibiting MAVS activation. This study reveals the regulatory mechanism of PZR-SHP2-MAVS signal axis on IFN signaling mediated by RIG-I and MDA5, which may provide new sight for developing antiviral drugs.
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Affiliation(s)
- Rilin Deng
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Lini Zhang
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Shengwen Chen
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Xinran Li
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Binbin Xue
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Tropical Translational Medicine of Ministry of Education, Department of Pathogen Biology, School of Basic Medicine and Life Science, Department of Pathology and Hainan Province Clinical Medical Center of the First Affiliated Hospital, The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou, 571199, Hainan, China
| | - Huiyi Li
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Tropical Translational Medicine of Ministry of Education, Department of Pathogen Biology, School of Basic Medicine and Life Science, Department of Pathology and Hainan Province Clinical Medical Center of the First Affiliated Hospital, The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou, 571199, Hainan, China
| | - Yan Xu
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Renyun Tian
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Qian Liu
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Luoling Wang
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Shun Liu
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Di Yang
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Penghui Li
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Songqing Tang
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China
| | - Haizhen Zhu
- Institute of Pathogen Biology and Immunology, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, Hunan, China; Key Laboratory of Tropical Translational Medicine of Ministry of Education, Department of Pathogen Biology, School of Basic Medicine and Life Science, Department of Pathology and Hainan Province Clinical Medical Center of the First Affiliated Hospital, The University of Hong Kong Joint Laboratory of Tropical Infectious Diseases, The First Affiliated Hospital of Hainan Medical University, Hainan Medical University, Haikou, 571199, Hainan, China.
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5
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Jooss NJ, Diender MG, Fernández DI, Huang J, Heubel-Moenen FCJ, van der Veer A, Kuijpers MJE, Poulter NS, Henskens YMC, Te Loo M, Heemskerk JWM. Restraining of glycoprotein VI- and integrin α2β1-dependent thrombus formation by platelet PECAM1. Cell Mol Life Sci 2024; 81:44. [PMID: 38236412 PMCID: PMC10796532 DOI: 10.1007/s00018-023-05058-2] [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: 07/14/2023] [Revised: 10/15/2023] [Accepted: 11/21/2023] [Indexed: 01/19/2024]
Abstract
The platelet receptors, glycoprotein VI (GPVI) and integrin α2β1 jointly control collagen-dependent thrombus formation via protein tyrosine kinases. It is unresolved to which extent the ITIM (immunoreceptor tyrosine-based inhibitory motif) receptor PECAM1 and its downstream acting protein tyrosine phosphatase PTPN11 interfere in this process. Here, we hypothesized that integrin α2β1 has a co-regulatory role in the PECAM1- and PTPN11-dependent restraint of thrombus formation. We investigated platelet activation under flow on collagens with a different GPVI dependency and using integrin α2β1 blockage. Blood was obtained from healthy subjects and from patients with Noonan syndrome with a gain-of-function mutation of PTPN11 and variable bleeding phenotype. On collagens with decreasing GPVI activity (types I, III, IV), the surface-dependent inhibition of PECAM1 did not alter thrombus parameters using control blood. Blockage of α2β1 generally reduced thrombus parameters, most effectively on collagen IV. Strikingly, simultaneous inhibition of PECAM1 and α2β1 led to a restoration of thrombus formation, indicating that the suppressing signaling effect of PECAM1 is masked by the platelet-adhesive receptor α2β1. Blood from 4 out of 6 Noonan patients showed subnormal thrombus formation on collagen IV. In these patients, effects of α2β1 blockage were counterbalanced by PECAM1 inhibition to a normal phenotype. In summary, we conclude that the suppression of GPVI-dependent thrombus formation by either PECAM1 or a gain-of-function of PTPN11 can be overruled by α2β1 engagement.
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Affiliation(s)
- Natalie J Jooss
- Department of Biochemistry, Maastricht University, Maastricht, The Netherlands
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
- Molecular Haematology Unit, University of Oxford, Headington, OX3 9DS, UK
| | - Marije G Diender
- Department of Pediatric Hematology, Amalia Children's Hospital, Radboud UMC, Nijmegen, The Netherlands
| | - Delia I Fernández
- Department of Biochemistry, Maastricht University, Maastricht, The Netherlands
- Platelet Proteomics Group, Centre for Research in Molecular Medicine and Chronic Diseases (CIMUS), Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Jingnan Huang
- Department of Biochemistry, Maastricht University, Maastricht, The Netherlands
- Platelet Proteomics Group, Centre for Research in Molecular Medicine and Chronic Diseases (CIMUS), Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Floor C J Heubel-Moenen
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Arian van der Veer
- Department of Pediatric Hematology, Amalia Children's Hospital, Radboud UMC, Nijmegen, The Netherlands
- Department of Pediatric Hematology, Maastricht University Medical Center, Maastricht, The Netherlands
| | | | - Natalie S Poulter
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
- Centre of Membrane Proteins and Receptors, Universities of Birmingham and Nottingham, Nottingham, Midlands, UK
| | - Yvonne M C Henskens
- Central Diagnostic Laboratory, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Maroeska Te Loo
- Department of Pediatric Hematology, Amalia Children's Hospital, Radboud UMC, Nijmegen, The Netherlands
| | - Johan W M Heemskerk
- Department of Biochemistry, Maastricht University, Maastricht, The Netherlands.
- Synapse Research Institute Maastricht, Kon. Emmaplein 7, 6217 KD, Maastricht, The Netherlands.
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6
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Dan J, Cai J, Zhong Y, Wang C, Huang S, Zeng Y, Fan Z, Xu C, Hu L, Zhang J, Hu J, Liu Y, Su X, Zhu W, Yan G, Liang J, Lin Y. Oncolytic virus M1 functions as a bifunctional checkpoint inhibitor to enhance the antitumor activity of DC vaccine. Cell Rep Med 2023; 4:101229. [PMID: 37820722 PMCID: PMC10591054 DOI: 10.1016/j.xcrm.2023.101229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 08/03/2023] [Accepted: 09/15/2023] [Indexed: 10/13/2023]
Abstract
Although promising, dendritic cell (DC) vaccines still provide limited clinical benefits, mainly due to the immunosuppressive tumor microenvironment (TME) and the lack of tumor-associated antigens (TAAs). Oncolytic virus therapy is an ideal strategy to overcome immunosuppression and expose TAAs; therefore, they may work synergistically with DC vaccines. In this study, we demonstrate that oncolytic virus M1 (OVM) can enhance the antitumor effects of DC vaccines across diverse syngeneic mouse tumor models by increasing the infiltration of CD8+ effector T cells in the TME. Mechanically, we show that tumor cells counteract DC vaccines through the SIRPα-CD47 immune checkpoint, while OVM can downregulate SIRPα in DCs and CD47 in tumor cells. Since OVM upregulates PD-L1 in DCs, combining PD-L1 blockade with DC vaccines and OVM further enhances antitumor activity. Overall, OVM strengthens the antitumor efficacy of DC vaccines by targeting the SIRPα-CD47 axis, which exerts dominant immunosuppressive effects on DC vaccines.
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Affiliation(s)
- Jia Dan
- Advanced Medical Technology Center, The First Affiliated Hospital-Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Jing Cai
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Yingqian Zhong
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Chaoqun Wang
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Shanyu Huang
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Ying Zeng
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Zhen Fan
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Cuiying Xu
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Linyi Hu
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Jiayu Zhang
- The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510000, China
| | - Jun Hu
- Department of Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Ying Liu
- Department of Infectious Diseases, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xingwen Su
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Wenbo Zhu
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Guangmei Yan
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Jiankai Liang
- Department of Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.
| | - Yuan Lin
- Advanced Medical Technology Center, The First Affiliated Hospital-Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.
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7
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Provenzale I, De Simone I, Gibbins JM, Heemskerk JWM, van der Meijden PEJ, Jones CI. Regulation of Glycoprotein VI-Dependent Platelet Activation and Thrombus Formation by Heparan Sulfate Proteoglycan Perlecan. Int J Mol Sci 2023; 24:13352. [PMID: 37686158 PMCID: PMC10487520 DOI: 10.3390/ijms241713352] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Proteoglycans form a heterogeneous family of proteins with covalently bound sulfated glycosaminoglycans. The extracellular matrix proteoglycan perlecan has been proposed to bind to the platelet- and megakaryocyte-specific receptor G6bB, co-regulating platelet glycoprotein VI (GPVI) signaling. The derived non-sulfate proteoglycan endorepellin was previously shown to enhance platelet adhesion via the collagen receptor, integrin α2β1. Here, we compared the roles of perlecan and other matrix proteoglycans in platelet responses and thrombus formation. We used multi-color flow cytometry to measure the degranulation and integrin αIIbβ3 activation of washed platelets in response to various proteoglycans and collagen-related peptide (CRP), the GPVI agonist. Perlecan, but not endorepellin, enhanced the CRP-induced activation of platelets in a time- and concentration-dependent manner. Similar to collagen, immobilized perlecan, but not other proteoglycans, supported static platelet adhesion and spreading. In-flowed whole-blood perlecan diminished shear-dependent platelet adhesion, while it enforced GPVI-dependent thrombus formation-to a larger extent than endorepellin-to induce more contracted aggregates of activated platelets. We concluded that the sulfated proteoglycan perlecan enhances GPVI-dependent platelet responses extending to thrombus formation, but it does so at the expense of reduced adhesion of platelets under flow.
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Affiliation(s)
- Isabella Provenzale
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, 6229 ER Maastricht, The Netherlands
- Institute for Cardiovascular and Metabolic Research (ICMR), School of Biological Sciences, University of Reading, Reading RG6 6EX, UK
| | - Ilaria De Simone
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, 6229 ER Maastricht, The Netherlands
- Institute for Cardiovascular and Metabolic Research (ICMR), School of Biological Sciences, University of Reading, Reading RG6 6EX, UK
- Synapse Research Institute Maastricht, Kon. Emmaplein 7, 6217 KD Maastricht, The Netherlands
| | - Jonathan M. Gibbins
- Institute for Cardiovascular and Metabolic Research (ICMR), School of Biological Sciences, University of Reading, Reading RG6 6EX, UK
| | - Johan W. M. Heemskerk
- Synapse Research Institute Maastricht, Kon. Emmaplein 7, 6217 KD Maastricht, The Netherlands
| | - Paola E. J. van der Meijden
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Chris I. Jones
- Institute for Cardiovascular and Metabolic Research (ICMR), School of Biological Sciences, University of Reading, Reading RG6 6EX, UK
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8
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Nandi I, Aroeti B. Mitogen-Activated Protein Kinases (MAPKs) and Enteric Bacterial Pathogens: A Complex Interplay. Int J Mol Sci 2023; 24:11905. [PMID: 37569283 PMCID: PMC10419152 DOI: 10.3390/ijms241511905] [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: 06/18/2023] [Revised: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023] Open
Abstract
Diverse extracellular and intracellular cues activate mammalian mitogen-activated protein kinases (MAPKs). Canonically, the activation starts at cell surface receptors and continues via intracellular MAPK components, acting in the host cell nucleus as activators of transcriptional programs to regulate various cellular activities, including proinflammatory responses against bacterial pathogens. For instance, binding host pattern recognition receptors (PRRs) on the surface of intestinal epithelial cells to bacterial pathogen external components trigger the MAPK/NF-κB signaling cascade, eliciting cytokine production. This results in an innate immune response that can eliminate the bacterial pathogen. However, enteric bacterial pathogens evolved sophisticated mechanisms that interfere with such a response by delivering virulent proteins, termed effectors, and toxins into the host cells. These proteins act in numerous ways to inactivate or activate critical components of the MAPK signaling cascades and innate immunity. The consequence of such activities could lead to successful bacterial colonization, dissemination, and pathogenicity. This article will review enteric bacterial pathogens' strategies to modulate MAPKs and host responses. It will also discuss findings attempting to develop anti-microbial treatments by targeting MAPKs.
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Affiliation(s)
| | - Benjamin Aroeti
- Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 9190410, Israel;
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9
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Kaiser R, Anjum A, Kammerer L, Loew Q, Akhalkatsi A, Rossaro D, Escaig R, Droste zu Senden A, Raude B, Lorenz M, Gold C, Pekayvaz K, Brocker T, Kranich J, Holch JW, Spiekermann K, Massberg S, Gaertner F, Nicolai L. Mechanosensing via a GpIIb/Src/14-3-3ζ axis critically regulates platelet migration in vascular inflammation. Blood 2023; 141:2973-2992. [PMID: 37018659 PMCID: PMC10646815 DOI: 10.1182/blood.2022019210] [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: 12/15/2022] [Revised: 02/17/2023] [Accepted: 03/05/2023] [Indexed: 04/07/2023] Open
Abstract
Platelets are not only the first responders in thrombosis and hemostasis but also central players in inflammation. Compared with platelets recruited to thrombi, immune-responsive platelets use distinct effector functions including actin-related protein complex 2/3-dependent migration along adhesive substrate gradients (haptotaxis), which prevents inflammatory bleeding and contributes to host defense. How platelet migration in this context is regulated on a cellular level is incompletely understood. Here, we use time-resolved morphodynamic profiling of individual platelets to show that migration, in contrast to clot retraction, requires anisotropic myosin IIa-activity at the platelet rear which is preceded by polarized actin polymerization at the front to initiate and maintain migration. Integrin GPIIb-dependent outside-in signaling via Gα13 coordinates polarization of migrating platelets to trigger tyrosine kinase c-Src/14-3-3ζ-dependent lamellipodium formation and functions independent of soluble agonists or chemotactic signals. Inhibitors of this signaling cascade, including the clinically used ABL/c-Src inhibitor dasatinib, interfere predominantly with the migratory capacity of platelets, without major impairment of classical platelet functions. In murine inflammation models, this translates to reduced migration of platelets visualized by 4D intravital microscopy, resulting in increased inflammation-associated hemorrhage in acute lung injury. Finally, platelets isolated from patients with leukemia treated with dasatinib who are prone to clinically relevant hemorrhage exhibit prominent migration defects, whereas other platelet functions are only partially affected. In summary, we define a distinct signaling pathway essential for migration and provide novel mechanistic insights explaining dasatinib-related platelet dysfunction and bleeding.
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Affiliation(s)
- Rainer Kaiser
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Afra Anjum
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Lisa Kammerer
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Quentin Loew
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Anastassia Akhalkatsi
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Dario Rossaro
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Raphael Escaig
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Augustin Droste zu Senden
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Ben Raude
- Department of Vascular Surgery, Charité–Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Michael Lorenz
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
| | - Christoph Gold
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Kami Pekayvaz
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Thomas Brocker
- Institute for Immunology, Biomedical Center, Medical Faculty, Ludwig-Maximilian University Munich, Munich, Germany
| | - Jan Kranich
- Institute for Immunology, Biomedical Center, Medical Faculty, Ludwig-Maximilian University Munich, Munich, Germany
| | - Julian Walter Holch
- Department of Medicine III, University Hospital, Ludwig-Maximilian University Munich, Munich, Germany
- Comprehensive Cancer Center, University Hospital, Ludwig-Maximilian University Munich, Munich, Germany
- German Cancer Consortium, Partner Site Munich and German Cancer Research Centre, Heidelberg, Germany
| | - Karsten Spiekermann
- Department of Medicine III, University Hospital, Ludwig-Maximilian University Munich, Munich, Germany
- Comprehensive Cancer Center, University Hospital, Ludwig-Maximilian University Munich, Munich, Germany
- German Cancer Consortium, Partner Site Munich and German Cancer Research Centre, Heidelberg, Germany
| | - Steffen Massberg
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Florian Gaertner
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Leo Nicolai
- Medizinische Klinik und Poliklinik I, University Hospital Ludwig-Maximilian University, Munich, Germany
- German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
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10
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Cox D. Sepsis - it is all about the platelets. Front Immunol 2023; 14:1210219. [PMID: 37350961 PMCID: PMC10282552 DOI: 10.3389/fimmu.2023.1210219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 05/19/2023] [Indexed: 06/24/2023] Open
Abstract
Sepsis is accompanied by thrombocytopenia and the severity of the thrombocytopenia is associated with mortality. This thrombocytopenia is characteristic of disseminated intravascular coagulation (DIC), the sepsis-associated coagulopathy. Many of the pathogens, both bacterial and viral, that cause sepsis also directly activate platelets, which suggests that pathogen-induced platelet activation leads to systemic thrombosis and drives the multi-organ failure of DIC. In this paper we review the mechanisms of platelet activation by pathogens and the evidence for a role for anti-platelet agents in the management of sepsis.
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Affiliation(s)
- Dermot Cox
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
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11
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Garcia C, Dejean S, Savy N, Bordet JC, Series J, Cadot S, Ribes A, Voisin S, Rugeri L, Payrastre B, Sié P. Multicolor flow cytometry in clinical samples for platelet signaling assessment. Res Pract Thromb Haemost 2023; 7:100180. [PMID: 37538502 PMCID: PMC10394564 DOI: 10.1016/j.rpth.2023.100180] [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: 09/25/2022] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 08/05/2023] Open
Abstract
Background Availability of multichannel cytometers and specific commercial antibodies makes flow cytometry a new option to simultaneously assess multiple intracellular platelet signaling pathways for clinical purposes, in small volume of blood or low platelet count. Objectives To describe a multicolor flow cytometry with fluorescent barcoding technique for screening signaling pathways downstream membrane receptors of major platelet agonists (adenosine diphosphate, thrombin, thromboxane, and collagen). Methods By comparison with immunoblotting, we first selected the target phosphoproteins, AKT, P38MAPK, LIMK, and SPL76; the times of stimulation; and phosphoflow barcoding conditions. We then performed a clinical study on whole blood of patients without evidence of blood platelet disorder on standard biological screening, consulting for trivial or occasionally provoked bleeds without familial antecedent (bleeding of unknown origin, n = 23) or type-1 von Willebrand disease (n = 9). In addition, we included a small group of patients with definite platelet disorders (Glanzmann thrombasthenia, δ-storage pool deficiency, and immune glycoprotein VI-related disease with granule secretion defect). Results The range, kinetics, and distribution of fluorescence intensity were established for each agonist-target protein combination. Principal component analysis indicates a correlation in response to a target phosphoprotein (AKT and P38MAPK) to different agonists but no correlation in the response of different target phosphoproteins to the same agonist. The heterogeneity of individual responses in the whole population displayed was analyzed using clustering algorithm. Patients with platelet storage pool deficiency were positioned as lowest responders on the heatmap. Conclusion In complement of functional tests, this study introduces a new approach for rapid platelet signaling profiling in clinical practice.
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Affiliation(s)
- Cedric Garcia
- CHU de Toulouse, Laboratoire d’Hématologie, Toulouse, France
- Institut des Maladies Métaboliques et Cardiovasculaires INSERM U1048, Université de Toulouse, Toulouse, France
| | - Sebastien Dejean
- Université Paul Sabatier Toulouse III, Institut de Mathématiques, CNRS UMR 5219, Toulouse, France
| | - Nicolas Savy
- Université Paul Sabatier Toulouse III, Institut de Mathématiques, CNRS UMR 5219, Toulouse, France
| | - Jean-Claude Bordet
- Laboratoire d’Hématologie, Hospices Civiles de Lyon, Lyon, France
- EA 4609-Hémostase et Cancer, Université Claude Bernard Lyon 1, Lyon, France
| | - Jennifer Series
- Institut des Maladies Métaboliques et Cardiovasculaires INSERM U1048, Université de Toulouse, Toulouse, France
| | - Sarah Cadot
- Institut des Maladies Métaboliques et Cardiovasculaires INSERM U1048, Université de Toulouse, Toulouse, France
| | - Agnès Ribes
- CHU de Toulouse, Laboratoire d’Hématologie, Toulouse, France
- Institut des Maladies Métaboliques et Cardiovasculaires INSERM U1048, Université de Toulouse, Toulouse, France
- Faculté de Médecine, Université Paul Sabatier Toulouse III, Toulouse, France
| | - Sophie Voisin
- CHU de Toulouse, Laboratoire d’Hématologie, Toulouse, France
| | - Lucia Rugeri
- Laboratoire d’Hématologie, Hospices Civiles de Lyon, Lyon, France
- Hospices Civils de Lyon, Unité d’Hémostase clinique, Bron, France
| | - Bernard Payrastre
- CHU de Toulouse, Laboratoire d’Hématologie, Toulouse, France
- Institut des Maladies Métaboliques et Cardiovasculaires INSERM U1048, Université de Toulouse, Toulouse, France
- Faculté de Médecine, Université Paul Sabatier Toulouse III, Toulouse, France
| | - Pierre Sié
- CHU de Toulouse, Laboratoire d’Hématologie, Toulouse, France
- Institut des Maladies Métaboliques et Cardiovasculaires INSERM U1048, Université de Toulouse, Toulouse, France
- Université Paul Sabatier Toulouse III, Faculté de Pharmacie, Toulouse, France
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12
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Yenwongfai LN, Arora R, Smith AP, Kalfa T, Husami A, Radulescu V, Myers K, Lorsbach R. Pediatric myelofibrosis due to compound heterozygous MPIG6B mutations in a patient of European ancestry. Pediatr Blood Cancer 2023; 70:e30023. [PMID: 36184776 DOI: 10.1002/pbc.30023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 09/01/2022] [Accepted: 09/05/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Leonard N Yenwongfai
- Department of Pathology and Laboratory Medicine, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Ranjana Arora
- Department of Pathology and Laboratory Medicine, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Alexander P Smith
- Department of Pathology and Laboratory Medicine, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | | | | | - Vlad Radulescu
- Pediatric Hematology and Oncology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
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13
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Mazharian A, Maître B, Bornert A, Hennequin D, Lourenco-Rodrigues M, Geer MJ, Smith CW, Heising S, Walter M, Montel F, Walker LSK, de la Salle H, Watson SP, Gachet C, Senis YA. Treatment of congenital thrombocytopenia and decreased collagen reactivity in G6b-B-deficient mice. Blood Adv 2023; 7:46-59. [PMID: 36269841 PMCID: PMC9813534 DOI: 10.1182/bloodadvances.2022008873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/15/2022] [Accepted: 09/22/2022] [Indexed: 01/18/2023] Open
Abstract
Mice lacking the immunoreceptor tyrosine-based inhibition motif-containing co-inhibitory receptor G6b-B (Mpig6b, G6b knockout, KO) are born with a complex megakaryocyte (MK) per platelet phenotype, characterized by severe macrothrombocytopenia, expansion of the MK population, and focal myelofibrosis in the bone marrow and spleen. Platelets are almost completely devoid of the glycoprotein VI (GPVI)-FcRγ-chain collagen receptor complex, have reduced collagen integrin α2β1, elevated Syk tyrosine kinase activity, and a subset has increased surface immunoglobulins. A similar phenotype was recently reported in patients with null and loss-of-function mutations in MPIG6B. To better understand the cause and treatment of this pathology, we used pharmacological- and genetic-based approaches to rescue platelet counts and function in G6b KO mice. Intravenous immunoglobulin resulted in a transient partial recovery of platelet counts, whereas immune deficiency did not affect platelet counts or receptor expression in G6b KO mice. Syk loss-of-function (R41A) rescued macrothrombocytopenia, GPVI and α2β1 expression in G6b KO mice, whereas treatment with the Syk kinase inhibitor BI1002494 partially rescued platelet count but had no effect on GPVI and α2β1 expression or bleeding. The Src family kinase inhibitor dasatinib was not beneficial in G6b KO mice. In contrast, treatment with the thrombopoietin mimetic romiplostim rescued thrombocytopenia, GPVI expression, and platelet reactivity to collagen, suggesting that it may be a promising therapeutic option for patients lacking functional G6b-B. Intriguingly, GPVI and α2β1 expression were significantly downregulated in romiplostim-treated wild-type mice, whereas GPVI was upregulated in romiplostim-treated G6b KO mice, suggesting a cell intrinsic feedback mechanism that autoregulates platelet reactivity depending on physiological needs.
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Affiliation(s)
- Alexandra Mazharian
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Blandine Maître
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Alicia Bornert
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Desline Hennequin
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Marc Lourenco-Rodrigues
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Mitchell J. Geer
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
- Laura and Isaac Perlmutter Cancer Center, New York University School of Medicine, NYU Langone Health, New York, NY
| | - Christopher W. Smith
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Silke Heising
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Michaela Walter
- Boehringer Ingelheim Pharma GmbH and Company KG, Ingelheim, Germany
| | - Florian Montel
- Boehringer Ingelheim Pharma GmbH and Company KG, Ingelheim, Germany
| | - Lucy S. K. Walker
- Division of Infection and Immunity, Institute of Immunity and Transplantation, University College London, Royal Free Campus, London, United Kingdom
| | - Henri de la Salle
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Steve P. Watson
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Christian Gachet
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
| | - Yotis A. Senis
- Université de Strasbourg, INSERM, Etablissement Français du Sang Grand-Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
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14
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A Novel Morphological Parameter Predicting Fibrotic Evolution in Myeloproliferative Neoplasms: New Evidence and Molecular Insights. Int J Mol Sci 2022; 23:ijms23147872. [PMID: 35887218 PMCID: PMC9322985 DOI: 10.3390/ijms23147872] [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: 05/20/2022] [Revised: 07/12/2022] [Accepted: 07/15/2022] [Indexed: 02/05/2023] Open
Abstract
Philadelphia-negative chronic myeloproliferative neoplasms (MPNs) represent a group of hematological disorders that are traditionally considered as indistinct slow progressing conditions; still, a subset of cases shows a rapid evolution towards myelofibrotic bone marrow failure. Specific abnormalities in the megakaryocyte lineage seem to play a central role in this evolution, especially in the bone marrow fibrosis but also in the induction of myeloproliferation. In this review, we analyze the current knowledge of prognostic factors of MPNs related to their evolution to myelofibrotic bone marrow failure. Moreover, we focused the role of the megakaryocytic lineage in the various stages of MPNs, with updated examples of MPNs in vitro and in vivo models and new therapeutic implications.
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15
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Takahashi N, Itoi S, Su MT, Endo S, Takai T. Co-localization of Fibronectin Receptors LILRB4/gp49B and Integrin on Dendritic Cell Surface. TOHOKU J EXP MED 2022; 257:171-180. [PMID: 35691913 DOI: 10.1620/tjem.2022.j014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A myeloid immune checkpoint, leukocyte immunoglobulin-like receptor (LILR) B4 (B4, also known as ILT3/CD85k in humans and gp49B in mice) is expressed on dendritic cells (DCs). However, a mode of regulation of DCs by B4/gp49B is not identified yet in relation to the ligand(s) as well as to the counteracting, activation-type receptor. Our recent identification of the physiological/pathological ligand for B4/gp49B as the fibronectin (FN) N-terminal 30-kDa domain poses the question of the relationship between B4/gp49B and a classical FN receptor/cellular activator, integrin, on DCs. Here we showed that FN is not constitutively tethered on the surface of bone marrow-derived cultured DCs (BMDCs) or splenic DCs, even though the FN receptor integrin and gp49B are co-expressed on these cells. Confocal laser scanning microscopic analysis, however, revealed weak correlation of fluorescent signals between gp49B and integrin β1, suggesting their partial co-localization on the BMDC surface even in the absence of FN. We found that the plating of BMDCs onto immobilized FN induced tyrosine phosphorylation of focal adhesion kinase (FAK) and spleen tyrosine kinase (Syk). In the absence of gp49B, while the FAK phosphorylation level was virtually unchanged, that of phosphorylation of Syk was markedly augmented. These results suggested that the immobilized FN induced a crosstalk between gp49B and integrin in terms of the intracellular signaling of BMDCs, in which gp49B suppressed the integrin-mediated pro-inflammatory cascade. Our observations may provide a clue for elucidating the mechanism of the therapeutic efficacy of B4/gp49B blocking in autoimmune disease and cancer.
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Affiliation(s)
- Naoyuki Takahashi
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University
| | - So Itoi
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University.,Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine
| | - Mei-Tzu Su
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University
| | - Shota Endo
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University
| | - Toshiyuki Takai
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University
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16
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Itoi S, Takahashi N, Saito H, Miyata Y, Su MT, Kezuka D, Itagaki F, Endo S, Fujii H, Harigae H, Sakamoto Y, Takai T. Myeloid immune checkpoint ILT3/LILRB4/gp49B can co-tether fibronectin with integrin on macrophages. Int Immunol 2022; 34:435-444. [PMID: 35689642 DOI: 10.1093/intimm/dxac023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 06/08/2022] [Indexed: 12/16/2022] Open
Abstract
LILRB4 (B4, also known as ILT3/CD85k) is an immune checkpoint of myeloid-lineage cells, albeit its mode of function remains obscure. Our recent identification of a common ligand for both human B4 and its murine ortholog gp49B as the fibronectin (FN) N-terminal 30-kDa domain poses the question of how B4/gp49B regulate cellular activity upon recognition of FN in the plasma and/or the extracellular matrix. Since FN in the extracellular matrix is tethered by FN-binding integrins, we hypothesized that B4/gp49B would tether FN in cooperation with integrins on the cell surface, thus they should be in close vicinity to integrins spatially. This scenario suggests a mode of function of B4/gp49B by which the FN-induced signal is regulated. FN pull-down complex was found to contain gp49B and integrin β1 in bone marrow-derived macrophages. The confocal fluorescent signals of the three molecules on the intrinsically FN-tethering macrophages were correlated to each other. When FN-poor macrophages adhered to culture plate, the gp49-integrin β1 signal correlation increased at the focal adhesion, supporting the notion that gp49B and integrin β1 become spatially closer to each other there. While adherence of RAW264.7 and THP-1 cells to immobilized FN induced phosphorylation of spleen tyrosine kinase, whose level was augmented under B4/gp49B deficiency. Thus, we concluded that B4/gp49B can co-tether fibronectin in cooperation with integrin in the cis configuration on the same cell, forming a B4/gp49B-FN-integrin triplet as a regulatory unit of focal adhesion-dependent proinflammatory signal in macrophages.
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Affiliation(s)
- So Itoi
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan.,Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan
| | - Naoyuki Takahashi
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Haruka Saito
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Yusuke Miyata
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Mei-Tzu Su
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Dai Kezuka
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Fumika Itagaki
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Shota Endo
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Hiroshi Fujii
- Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan
| | - Hideo Harigae
- Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan
| | - Yuzuru Sakamoto
- Department of Human Science, Faculty of Liberal Arts, Tohoku Gakuin University, Sendai 981-3193, Japan
| | - Toshiyuki Takai
- Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
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17
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Schrottmaier WC, Schmuckenschlager A, Pirabe A, Assinger A. Platelets in Viral Infections - Brave Soldiers or Trojan Horses. Front Immunol 2022; 13:856713. [PMID: 35419008 PMCID: PMC9001014 DOI: 10.3389/fimmu.2022.856713] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/03/2022] [Indexed: 11/13/2022] Open
Abstract
Viral infections are often associated with platelet activation and haemostatic complications. In line, low platelet counts represent a hallmark for poor prognosis in many infectious diseases. The underlying cause of platelet dysfunction in viral infections is multifaceted and complex. While some viruses directly interact with platelets and/or megakaryocytes to modulate their function, also immune and inflammatory responses directly and indirectly favour platelet activation. Platelet activation results in increased platelet consumption and degradation, which contributes to thrombocytopenia in these patients. The role of platelets is often bi-phasic. Initial platelet hyper-activation is followed by a state of platelet exhaustion and/or hypo-responsiveness, which together with low platelet counts promotes bleeding events. Thereby infectious diseases not only increase the thrombotic but also the bleeding risk or both, which represents a most dreaded clinical complication. Treatment options in these patients are limited and new therapeutic strategies are urgently needed to prevent adverse outcome. This review summarizes the current literature on platelet-virus interactions and their impact on viral pathologies and discusses potential intervention strategies. As pandemics and concomitant haemostatic dysregulations will remain a recurrent threat, understanding the role of platelets in viral infections represents a timely and pivotal challenge.
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Affiliation(s)
- Waltraud C Schrottmaier
- Institute of Vascular Biology and Thrombosis Research, Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Anna Schmuckenschlager
- Institute of Vascular Biology and Thrombosis Research, Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Anita Pirabe
- Institute of Vascular Biology and Thrombosis Research, Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Alice Assinger
- Institute of Vascular Biology and Thrombosis Research, Centre of Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
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18
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Xin Y, Peng J, Hong YY, Chao QC, Na S, Pan S, Zhao LF. Advances in research on the effects of platelet activation in acute lung injury (Review). Biomed Rep 2022; 16:17. [PMID: 35154701 PMCID: PMC8814673 DOI: 10.3892/br.2022.1500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 01/05/2022] [Indexed: 11/17/2022] Open
Abstract
Acute lung injury (ALI) is an acute hypoxic respiratory insufficiency or failure caused by various factors inside and outside the lungs. ALI is associated with high morbidity and a poor prognosis in hospitalized patients. The lungs serve as a reservoir for platelet precursor megakaryocytes and are closely associated with platelets. Platelets not only play a central role in hemostasis, coagulation and wound healing, but can also act as inflammatory cells capable of stimulating non-hemostatic immune functions under inflammatory conditions, participating in the progression of various inflammatory diseases, and can result in tissue damage. Therefore, it was speculated that platelets may play an important role in the pathogenesis of ALI. In this review, the latest research progress on secretion of bioactive mediators from platelets, platelet activation-related signaling pathways, and the direct contact reactions between platelets and neutrophils with endothelial cells that result in ALI are described, providing evidence to support the importance of the consideration of platelets in the search for ALI interventional targets.
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Affiliation(s)
- Yuan Xin
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
| | - Jiang Peng
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
| | - Yu Yun Hong
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
| | - Qiao Cong Chao
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
| | - Su Na
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
| | - Sun Pan
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
| | - Lin Fang Zhao
- Institute of Blood Transfusion, Chinese Academy of Medical Science and Peking Union Medical College, Chengdu, Sichuan 610052, P.R. China
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19
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Little A, Hu Y, Sun Q, Jain D, Broome J, Chen MH, Thibord F, McHugh C, Surendran P, Blackwell TW, Brody JA, Bhan A, Chami N, de Vries PS, Ekunwe L, Heard-Costa N, Hobbs BD, Manichaikul A, Moon JY, Preuss MH, Ryan K, Wang Z, Wheeler M, Yanek LR, Abecasis GR, Almasy L, Beaty TH, Becker LC, Blangero J, Boerwinkle E, Butterworth AS, Choquet H, Correa A, Curran JE, Faraday N, Fornage M, Glahn DC, Hou L, Jorgenson E, Kooperberg C, Lewis JP, Lloyd-Jones DM, Loos RJF, Min YI, Mitchell BD, Morrison AC, Nickerson DA, North KE, O'Connell JR, Pankratz N, Psaty BM, Vasan RS, Rich SS, Rotter JI, Smith AV, Smith NL, Tang H, Tracy RP, Conomos MP, Laurie CA, Mathias RA, Li Y, Auer PL, Thornton T, Reiner AP, Johnson AD, Raffield LM. Whole genome sequence analysis of platelet traits in the NHLBI Trans-Omics for Precision Medicine (TOPMed) initiative. Hum Mol Genet 2022; 31:347-361. [PMID: 34553764 PMCID: PMC8825339 DOI: 10.1093/hmg/ddab252] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/23/2021] [Accepted: 08/24/2021] [Indexed: 12/15/2022] Open
Abstract
Platelets play a key role in thrombosis and hemostasis. Platelet count (PLT) and mean platelet volume (MPV) are highly heritable quantitative traits, with hundreds of genetic signals previously identified, mostly in European ancestry populations. We here utilize whole genome sequencing (WGS) from NHLBI's Trans-Omics for Precision Medicine initiative (TOPMed) in a large multi-ethnic sample to further explore common and rare variation contributing to PLT (n = 61 200) and MPV (n = 23 485). We identified and replicated secondary signals at MPL (rs532784633) and PECAM1 (rs73345162), both more common in African ancestry populations. We also observed rare variation in Mendelian platelet-related disorder genes influencing variation in platelet traits in TOPMed cohorts (not enriched for blood disorders). For example, association of GP9 with lower PLT and higher MPV was partly driven by a pathogenic Bernard-Soulier syndrome variant (rs5030764, p.Asn61Ser), and the signals at TUBB1 and CD36 were partly driven by loss of function variants not annotated as pathogenic in ClinVar (rs199948010 and rs571975065). However, residual signal remained for these gene-based signals after adjusting for lead variants, suggesting that additional variants in Mendelian genes with impacts in general population cohorts remain to be identified. Gene-based signals were also identified at several genome-wide association study identified loci for genes not annotated for Mendelian platelet disorders (PTPRH, TET2, CHEK2), with somatic variation driving the result at TET2. These results highlight the value of WGS in populations of diverse genetic ancestry to identify novel regulatory and coding signals, even for well-studied traits like platelet traits.
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Affiliation(s)
- Amarise Little
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Yao Hu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Quan Sun
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Deepti Jain
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Jai Broome
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Ming-Huei Chen
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, Bethesda, MD 20892, USA
- National Heart Lung and Blood Institute's and Boston University's Framingham Heart Study, Framingham, MA 01702, USA
| | - Florian Thibord
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, Bethesda, MD 20892, USA
- National Heart Lung and Blood Institute's and Boston University's Framingham Heart Study, Framingham, MA 01702, USA
| | - Caitlin McHugh
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Praveen Surendran
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge CB1 8RN, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge CB1 8RN, UK
- Rutherford Fund Fellow, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
| | - Thomas W Blackwell
- TOPMed Informatics Research Center, University of Michigan, Department of Biostatistics, Ann Arbor, MI 48109, USA
| | - Jennifer A Brody
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA 98101, USA
| | | | - Nathalie Chami
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York City, NY 10029, USA
| | - Paul S de Vries
- Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, Human Genetics Center, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Lynette Ekunwe
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Nancy Heard-Costa
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118, USA
- National Heart Lung and Blood Institute's and Boston University's Framingham Heart Study, Framingham, MA 01702, USA
| | - Brian D Hobbs
- Channing Division of Network Medicine and Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Ani Manichaikul
- Department of Public Health Sciences, Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Jee-Young Moon
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Michael H Preuss
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York City, NY 10029, USA
| | - Kathleen Ryan
- Department of Medicine, Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Zhe Wang
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York City, NY 10029, USA
| | - Marsha Wheeler
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | - Lisa R Yanek
- Division of General Internal Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Goncalo R Abecasis
- TOPMed Informatics Research Center, University of Michigan, Department of Biostatistics, Ann Arbor, MI 48109, USA
| | - Laura Almasy
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Department of Genetics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | | | - Lewis C Becker
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - John Blangero
- Department of Human Genetics and South Texas Diabetes and Obesity Institute, School of Medicine, University of Texas Rio Grande Valley, Brownsville, TX 78520, USA
| | - Eric Boerwinkle
- Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, Human Genetics Center, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Adam S Butterworth
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge CB1 8RN, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge CB1 8RN, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge CB1 8RN, UK
- National Institute for Health Research Cambridge Biomedical Research Centre, University of Cambridge and Cambridge University Hospitals, Cambridge CB1 8RN, UK
| | - Hélène Choquet
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Adolfo Correa
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Joanne E Curran
- Department of Human Genetics and South Texas Diabetes and Obesity Institute, School of Medicine, University of Texas Rio Grande Valley, Brownsville, TX 78520, USA
| | - Nauder Faraday
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Myriam Fornage
- University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - David C Glahn
- Department of Psychiatry, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Lifang Hou
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Eric Jorgenson
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Charles Kooperberg
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Joshua P Lewis
- Department of Medicine, Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Donald M Lloyd-Jones
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Ruth J F Loos
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York City, NY 10029, USA
| | - Yuan-I Min
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Braxton D Mitchell
- Department of Medicine, Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Alanna C Morrison
- Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, Human Genetics Center, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | - Kari E North
- Department of Epidemiology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Jeffrey R O'Connell
- Department of Medicine, Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Nathan Pankratz
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Bruce M Psaty
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA 98101, USA
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA
- Kaiser Permanente Washington Health Research Institute, Kaiser Permanente Washington, Seattle WA 98101, USA
| | - Ramachandran S Vasan
- National Heart Lung and Blood Institute's and Boston University's Framingham Heart Study, Framingham, MA 01702, USA
- Departments of Cardiology and Preventive Medicine, Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA
- Department of Epidemiology, Boston University School of Public Health, Boston, MA 02118, USA
| | - Stephen S Rich
- Department of Public Health Sciences, Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Jerome I Rotter
- Department of Pediatrics, The Institute for Translational Genomics and Population Sciences, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - Albert V Smith
- TOPMed Informatics Research Center, University of Michigan, Department of Biostatistics, Ann Arbor, MI 48109, USA
| | - Nicholas L Smith
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA
- Kaiser Permanente Washington Health Research Institute, Kaiser Permanente Washington, Seattle WA 98101, USA
- Department of Veterans Affairs Office of Research and Development, Seattle Epidemiologic Research and Information Center, Seattle, WA 98108, USA
| | - Hua Tang
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Russell P Tracy
- Department of Pathology and Laboratory Medicine and Biochemistry, University of Vermont Larner College of Medicine, Colchester, VT 05446, USA
| | - Matthew P Conomos
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Cecelia A Laurie
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Rasika A Mathias
- Division of Allergy and Clinical Immunology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Yun Li
- Departments of Biostatistics, Genetics, Computer Science, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Paul L Auer
- Zilber School of Public Health, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA
| | | | - Timothy Thornton
- Department of Biostatistics, University of Washington, Seattle, WA 98105, USA
| | - Alexander P Reiner
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA
| | - Andrew D Johnson
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung and Blood Institute, Bethesda, MD 20892, USA
- National Heart Lung and Blood Institute's and Boston University's Framingham Heart Study, Framingham, MA 01702, USA
| | - Laura M Raffield
- Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
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20
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Rumpret M, von Richthofen HJ, Peperzak V, Meyaard L. Inhibitory pattern recognition receptors. J Exp Med 2022; 219:212908. [PMID: 34905019 PMCID: PMC8674843 DOI: 10.1084/jem.20211463] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/03/2021] [Accepted: 12/02/2021] [Indexed: 12/18/2022] Open
Abstract
Pathogen- and damage-associated molecular patterns are sensed by the immune system's pattern recognition receptors (PRRs) upon contact with a microbe or damaged tissue. In situations such as contact with commensals or during physiological cell death, the immune system should not respond to these patterns. Hence, immune responses need to be context dependent, but it is not clear how context for molecular pattern recognition is provided. We discuss inhibitory receptors as potential counterparts to activating pattern recognition receptors. We propose a group of inhibitory pattern recognition receptors (iPRRs) that recognize endogenous and microbial patterns associated with danger, homeostasis, or both. We propose that recognition of molecular patterns by iPRRs provides context, helps mediate tolerance to microbes, and helps balance responses to danger signals.
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Affiliation(s)
- Matevž Rumpret
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Oncode Institute, Utrecht, The Netherlands
| | - Helen J von Richthofen
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Oncode Institute, Utrecht, The Netherlands
| | - Victor Peperzak
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Linde Meyaard
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Oncode Institute, Utrecht, The Netherlands
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21
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Bone marrow microenvironment of MPN cells. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2021. [PMID: 34756245 DOI: 10.1016/bs.ircmb.2021.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
In this chapter, we will discuss the current knowledge concerning the alterations of the cellular components in the bone marrow niche in Myeloproliferative Neoplasms (MPNs), highlighting the central role of the megakaryocytes in MPN progression, and the extracellular matrix components characterizing the fibrotic bone marrow.
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22
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Xu X, Masubuchi T, Cai Q, Zhao Y, Hui E. Molecular features underlying differential SHP1/SHP2 binding of immune checkpoint receptors. eLife 2021; 10:74276. [PMID: 34734802 PMCID: PMC8631942 DOI: 10.7554/elife.74276] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/16/2021] [Indexed: 12/19/2022] Open
Abstract
A large number of inhibitory receptors recruit SHP1 and/or SHP2, tandem-SH2-containing phosphatases through phosphotyrosine-based motifs immunoreceptor tyrosine-based inhibitory motif (ITIM) and immunoreceptor tyrosine-based switch motif (ITSM). Despite the similarity, these receptors exhibit differential effector binding specificities, as exemplified by the immune checkpoint receptors PD-1 and BTLA, which preferentially recruit SHP2 and SHP1, respectively. The molecular basis by which structurally similar receptors discriminate SHP1 and SHP2 is unclear. Here, we provide evidence that human PD-1 and BTLA optimally bind to SHP1 and SHP2 via a bivalent, parallel mode that involves both SH2 domains of SHP1 or SHP2. PD-1 mainly uses its ITSM to prefer SHP2 over SHP1 via their C-terminal SH2 domains (cSH2): swapping SHP1-cSH2 with SHP2-cSH2 enabled PD-1:SHP1 association in T cells. In contrast, BTLA primarily utilizes its ITIM to prefer SHP1 over SHP2 via their N-terminal SH2 domains (nSH2). The ITIM of PD-1, however, appeared to be de-emphasized due to a glycine at pY+1 position. Substitution of this glycine with alanine, a residue conserved in BTLA and several SHP1-recruiting receptors, was sufficient to induce PD-1:SHP1 interaction in T cells. Finally, structural simulation and mutagenesis screening showed that SHP1 recruitment activity exhibits a bell-shaped dependence on the molecular volume of the pY+1 residue of ITIM. Collectively, we provide a molecular interpretation of the SHP1/SHP2-binding specificities of PD-1 and BTLA, with implications for the mechanisms of a large family of therapeutically relevant receptors.
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Affiliation(s)
- Xiaozheng Xu
- Section of Cell & Developmental Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, United States
| | - Takeya Masubuchi
- Section of Cell & Developmental Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, United States
| | - Qixu Cai
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, China
| | - Yunlong Zhao
- Section of Cell & Developmental Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, United States
| | - Enfu Hui
- Section of Cell & Developmental Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, United States
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23
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Wu G, Xu Y, Schultz RD, Chen H, Xie J, Deng M, Liu X, Gui X, John S, Lu Z, Arase H, Zhang N, An Z, Zhang CC. LILRB3 supports acute myeloid leukemia development and regulates T-cell antitumor immune responses through the TRAF2-cFLIP-NF-κB signaling axis. NATURE CANCER 2021; 2:1170-1184. [PMID: 35122056 PMCID: PMC8809885 DOI: 10.1038/s43018-021-00262-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 08/24/2021] [Indexed: 01/08/2023]
Abstract
Leukocyte immunoglobulin-like receptor B (LILRB), a family of immune checkpoint receptors, contributes to acute myeloid leukemia (AML) development, but the specific mechanisms triggered by activation or inhibition of these immune checkpoints in cancer is largely unknown. Here we demonstrate that the intracellular domain of LILRB3 is constitutively associated with the adaptor protein TRAF2. Activated LILRB3 in AML cells leads to recruitment of cFLIP and subsequent NF-κB upregulation, resulting in enhanced leukemic cell survival and inhibition of T-cell-mediated anti-tumor activity. Hyperactivation of NF-κB induces a negative regulatory feedback loop mediated by A20, which disrupts the interaction of LILRB3 and TRAF2; consequently the SHP-1/2-mediated inhibitory activity of LILRB3 becomes dominant. Finally, we show that blockade of LILRB3 signaling with antagonizing antibodies hampers AML progression. LILRB3 thus exerts context-dependent activating and inhibitory functions, and targeting LILRB3 may become a potential therapeutic strategy for AML treatment.
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Affiliation(s)
- Guojin Wu
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Yixiang Xu
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
| | - Robbie D Schultz
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
| | - Heyu Chen
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Jingjing Xie
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Mi Deng
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Xiaoye Liu
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Xun Gui
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
| | - Samuel John
- Division of Pediatric Hematology- Oncology, Department of Pediatrics, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Zhigang Lu
- Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA
| | - Hisashi Arase
- Department of Immunochemistry, Research Institute for Microbial Diseases and Laboratory of Immunochemistry, World Premier International Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Ningyan Zhang
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
| | - Zhiqiang An
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
| | - Cheng Cheng Zhang
- Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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24
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Kuriri F, Burchall G, Alanazi F, Antonipillai J, Dobie G, Beauchemin N, Jackson DE. Mice lacking PECAM-1 and Ceacam1 have an aberrant platelet and thrombus phenotype. Thromb Haemost 2021; 122:961-973. [PMID: 34619794 DOI: 10.1055/a-1663-8108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The immunoglobulin (Ig)-immunoreceptor tyrosine-based inhibitory motif (ITIM) bearing receptors, PECAM-1 and CEACAM1 have been shown net negative regulators of platelet-collagen interactions and hemi-ITAM signalling pathways. In this study, a double knockout (DKO) mouse was developed with deleted PECAM-1 and CEACAM1 to study their combined contribution in platelet activation by glycoprotein VI, C-type lectin-like receptor 2 (CLEC-2), protease activated receptor PAR-4, ADP purinergic receptors and thromboxane receptor TP A2 pathways. Additionally, their collective contribution was examined in thrombus formation under high shear and microvascular thrombosis using in vivo models. DKO platelets responded normally to ADP purinergic receptors and TP A2 pathway. However, DKO platelets released significantly higher amounts of P-selectin compared to hyper-responsive Pecam-1-/- or Ceacam1-/- versus wild-type (WT) upon stimulation with collagen related peptide or rhodocytin. Contrastingly, DKO platelets released increased amounts of P-selectin upon stimulation with PAR-4 agonist peptide or thrombin but not Pecam-1-/-, Ceacam1-/- or WT platelets. Blockade of phospholipase C (PLC) or Rho A kinase revealed that DKO platelets enhanced alpha granule release via PAR-4/Gαq/PLC signalling without crosstalk with Src/Syk or G12/13 signalling pathways. This DKO model showed a significant increase in thrombus formation compared to the hyper-responsive Ceacam1-/- or Pecam-1-/- versus WT phenotype. DKO platelets have similar glycoprotein surface expression compared to Pecam-1-/-, Ceacam1-/- and WT platelets. PECAM-1 and CEACAM1 work in concert to negatively regulate hemiITAM signalling, platelet-collagen interactions and PAR-4 Gαq protein coupled signalling pathways. Both PECAM-1 and CEACAM1 are required for negative regulation of platelet activation and microvascular thrombosis in vivo.
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Affiliation(s)
- Fahd Kuriri
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Australia.,Shaqra University College of Applied Medical Sciences, Shaqra, Saudi Arabia
| | | | - Fehaid Alanazi
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Australia.,College of Applied Medical Sciences, Al Jouf University, Skaka, Saudi Arabia
| | - Juliana Antonipillai
- Thrombosis and Vascular Diseases Laboratory, RMIT University, Melbourne, Australia
| | - Gasim Dobie
- Haematology Unit, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
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25
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Melki I, Allaeys I, Tessandier N, Lévesque T, Cloutier N, Laroche A, Vernoux N, Becker Y, Benk-Fortin H, Zufferey A, Rollet-Labelle E, Pouliot M, Poirier G, Patey N, Belleannee C, Soulet D, McKenzie SE, Brisson A, Tremblay ME, Lood C, Fortin PR, Boilard E. Platelets release mitochondrial antigens in systemic lupus erythematosus. Sci Transl Med 2021; 13:13/581/eaav5928. [PMID: 33597264 DOI: 10.1126/scitranslmed.aav5928] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 03/20/2020] [Accepted: 10/02/2020] [Indexed: 12/13/2022]
Abstract
The accumulation of DNA and nuclear components in blood and their recognition by autoantibodies play a central role in the pathophysiology of systemic lupus erythematosus (SLE). Despite the efforts, the sources of circulating autoantigens in SLE are still unclear. Here, we show that in SLE, platelets release mitochondrial DNA, the majority of which is associated with the extracellular mitochondrial organelle. Mitochondrial release in patients with SLE correlates with platelet degranulation. This process requires the stimulation of platelet FcγRIIA, a receptor for immune complexes. Because mice lack FcγRIIA and murine platelets are completely devoid of receptor capable of binding IgG-containing immune complexes, we used transgenic mice expressing FcγRIIA for our in vivo investigations. FcγRIIA expression in lupus-prone mice led to the recruitment of platelets in kidneys and to the release of mitochondria in vivo. Using a reporter mouse with red fluorescent protein targeted to the mitochondrion, we confirmed platelets as a source of extracellular mitochondria driven by FcγRIIA and its cosignaling by the fibrinogen receptor α2bβ3 in vivo. These findings suggest that platelets might be a key source of mitochondrial antigens in SLE and might be a therapeutic target for treating SLE.
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Affiliation(s)
- Imene Melki
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Isabelle Allaeys
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Nicolas Tessandier
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Tania Lévesque
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Nathalie Cloutier
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Audrée Laroche
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Nathalie Vernoux
- Axe Neurosciences du Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval et Département de Médecine Moléculaire de l'Université Laval, Québec, QC G1V 4G2, Canada
| | - Yann Becker
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Hadrien Benk-Fortin
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Anne Zufferey
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Emmanuelle Rollet-Labelle
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Marc Pouliot
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada.,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
| | - Guy Poirier
- Department of Molecular Biology, Medical Biochemistry, and Pathology, Faculty of Medicine, Université Laval, Quebec, QC G1V 4G2, Canada
| | - Natacha Patey
- Centre Hospitalier Universitaire de Sainte-Justine, Faculté de Médecine, Département de pathologie et biologie cellulaire, Université de Montréal, Montréal, QC H3T 1C5, Canada
| | - Clemence Belleannee
- Department of Obstetrics, Gynecology and Reproduction, Centre hospitalier universitaire de Québec-Université Laval et Département de médecine moléculaire de l'Université Laval, Québec, QC G1V 4G2, Canada
| | - Denis Soulet
- Department of Molecular Biology, Medical Biochemistry, and Pathology, Faculty of Medicine, Université Laval, Quebec, QC G1V 4G2, Canada
| | - Steven E McKenzie
- Cardeza Foundation for Hematologic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Alain Brisson
- UMR-CBMN CNRS-Université de Bordeaux-IPB, Pessac 33600, France
| | - Marie-Eve Tremblay
- Axe Neurosciences du Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval et Département de Médecine Moléculaire de l'Université Laval, Québec, QC G1V 4G2, Canada.,Division of Medical Sciences, University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Christian Lood
- Division of Rheumatology, Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Paul R Fortin
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada. .,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada.,Division of Rheumatology, Department of Medicine, Centre hospitalier universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Eric Boilard
- Centre de Recherche du Centre Hospitalier Universitaire de Québec-Université Laval, Québec, QC G1V 4G2, Canada. .,Faculté de Médecine and Centre de Recherche ARThrite, Université Laval, Québec, QC G1V 4G2, Canada
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26
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Acquired platelet GPVI receptor dysfunction in critically ill patients with sepsis. Blood 2021; 137:3105-3115. [PMID: 33827131 DOI: 10.1182/blood.2020009774] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 03/23/2021] [Indexed: 11/20/2022] Open
Abstract
Glycoprotein VI (GPVI), the platelet immunoreceptor tyrosine activating motif (ITAM) receptor for collagen, plays a striking role on vascular integrity in animal models of inflammation and sepsis. Understanding ITAM-receptor signaling defects in humans suffering from sepsis may improve our understanding of the pathophysiology, especially during disease onset. In a pilot study, platelets from 15 patients with sepsis were assessed consecutively at day of admission, day 5 to 7, and the day of intensive care unit (ICU) discharge and subjected to comprehensive analyses by flow cytometry, aggregometry, and immunoblotting. Platelet function was markedly reduced in all patients. The defect was most prominent after GPVI stimulation with collagen-related peptide. In 14 of 15 patients, GPVI dysfunction was already present at time of ICU admission, considerably before the critical drop in platelet counts. Sepsis platelets failed to transduce the GPVI-mediated signal to trigger tyrosine phosphorylation of Syk kinase or LAT. GPVI deficiency was partially inducible in platelets of healthy donors through coincubation in whole blood, but not in plasma from patients with sepsis. Platelet aggregation upon GPVI stimulation increased only in those patients whose condition ameliorated. As blunted GPVI signaling occurred early at sepsis onset, this defect could be exploited as an indicator for early sepsis diagnosis, which needs to be confirmed in prospective studies.
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27
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Xia L, Zhang B, Sun Y, Chen B, Yu Z. Analysis of Syk/PECAM-1 signaling pathway in low shear stress induced atherosclerosis based on ultrasound imaging. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2021; 201:105953. [PMID: 33571923 DOI: 10.1016/j.cmpb.2021.105953] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND AND OBJECTIVE Low shear stress (LSS) has been demonstrated to be involved in function of vascular endothelial cells. Here we tested the hypothesis that activation of Syk played an important in LSS-induced atherosclerosis via PECAM-1 signaling pathway. METHODS In vitro, primary human umbilical vein endothelial cells (HUVECs) were stimulated with parallel plate flow chamber system for 12h under normal shear stress (NSS, 15dyne/cm2), LSS (5dyne/cm2) and high shear stress (HSS, 25dyne/cm2), respectively, followed by inflammatory response analysis. In vivo, animal models of rat fed atherogenic diet were treated with LSS stimulation by constricting abdominal aorta with a blunted needle (0.6mm in diameter). The spatial distribution of WSS of blood vessels was generated by WSS quantitative analysis software through color Doppler flow imaging with a high-frequency small animal ultrasound system. Small molecule R406, a well-demonstrated Syk inhibitor, was applied to animals as well as HUVEC cells. RESULTS In vivo, comparison with the control group was performed, the mean value of WSS distribution of blood vessels was lower in LSS model rat. LSS promoted expression of phosphorylated PECAM-1 (p-PECAM-1) and Syk in LSS model rats. Compared with control group, endothelial cells of the abdominal aorta become less elongated and more polygonal in LSS group, and had a slender shape in LSS with R406 group. In vitro, LSS increased the expression of p-PECAM-1, Syk and NF-κB in HUVECs. Inhibition of Syk attenuated LSS-induced inflammatory response. CONCLUSIONS Activation of Syk resulted in LSS-induced inflammatory response via PECAM-1 signaling pathway both in vitro and in vivo. Syk might be involved in morphological changes of ECs under the influence of LSS.
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Affiliation(s)
- Lianghua Xia
- Department of Ultrasound in Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Bo Zhang
- Department of Ultrasound in Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Yuqing Sun
- Department of Ultrasound in Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Bingguan Chen
- Department of Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zuoren Yu
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.
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28
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Soriano Jerez EM, Gibbins JM, Hughes CE. Targeting platelet inhibition receptors for novel therapies: PECAM-1 and G6b-B. Platelets 2021; 32:761-769. [PMID: 33646086 DOI: 10.1080/09537104.2021.1882668] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
While current oral antiplatelet therapies benefit many patients, they deregulate the hemostatic balance leaving patients at risk of systemic side-effects such as hemorrhage. Dual antiplatelet treatment is the standard approach, combining aspirin with P2Y12 blockers. These therapies mainly target autocrine activation mechanisms (TxA2, ADP) and, more recently, the use of thrombin or thrombin receptor antagonists have been added to the available approaches. Recent efforts to develop new classes of anti-platelet drugs have begun to focus on primary platelet activation pathways such as through the immunoreceptor tyrosine-based activation motif (ITAM)-containing collagen receptor GPVI/FcRγ-chain complex. There are already encouraging results from targeting GPVI, with reduced aggregation and smaller arterial thrombi, without major bleeding complications, likely due to overlapping activation signaling pathways with other receptors such as the GPIb-V-IX complex. An alternative approach to reduce platelet activation could be to inhibit this signaling pathway by targeting the inhibitory pathways intrinsic to platelets. Stimulation of endogenous negative modulators could provide more specific inhibition of platelet function, but is this feasible? In this review, we explore the potential of the two major platelet immunoreceptor tyrosine-based inhibitory motif (ITIM)-containing inhibitory receptors, G6b-B and PECAM-1, as antithrombotic targets.
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Affiliation(s)
- Eva M Soriano Jerez
- Institute for Cardiovascular and Metabolic Research, University of Reading, Reading, UK.,Institute of Experimental Biomedicine, University Hospital Würzburg and Rudolf Virchow Center for Integrative and Translational Bioimaging, University of Würzburg, Würzburg, Germany
| | - Jonathan M Gibbins
- Institute for Cardiovascular and Metabolic Research, University of Reading, Reading, UK
| | - Craig E Hughes
- Institute for Cardiovascular and Metabolic Research, University of Reading, Reading, UK
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29
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Fang Y, Gu Y, Zhao C, Lv Y, Qian J, Zhu L, Yuan N, Zhang S, Wang L, Li M, Zhang Q, Xu L, Wei W, Li L, Ji L, Gao X, Zhang J, Shen Y, Chen Z, Wang G, Dai K, Wang J. Impact of supervised beego, a traditional Chinese water-only fasting, on thrombosis and haemostasis. BMJ Nutr Prev Health 2021; 4:4-17. [PMID: 34308107 PMCID: PMC8258074 DOI: 10.1136/bmjnph-2020-000183] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/03/2020] [Accepted: 12/08/2020] [Indexed: 12/17/2022] Open
Abstract
Beego is a traditional Chinese complete water-only fasting practice initially developed for spiritual purposes, later extending to physical fitness purposes. Beego notably includes a psychological induction component that includes meditation and abdominal breathing, light body exercise and ends with a specific gradual refeeding program before returning to a normal diet. Beego has regained its popularity in recent decades in China as a strategy for helping people in subhealthy conditions or with metabolic syndrome, but we are unaware of any studies examining the biological effects of this practice. To address this, we here performed a longitudinal study of beego comprising fasting (7 and 14 day cohorts) and a 7-day programmed refeeding phase. In addition to detecting improvements in cardiovascular physiology and selective reduction of blood pressure in hypertensive subjects, we observed that beego decreased blood triacylglycerol (TG) selectively in TG-high subjects and increased cholesterol in all subjects during fasting; however, the cholesterol levels were normalised after completion of the refeeding program. Strikingly, beego reduced platelet formation, activation, aggregation and degranulation, resulting in an alleviated thrombosis risk, yet maintained haemostasis by sustaining levels of coagulation factors and other haemostatic proteins. Mechanistically, we speculate that downregulation of G6B and MYL9 may influence the observed beego-mediated reduction in platelets. Fundamentally, our study supports that supervised beego reduces thrombosis risk without compromising haemostasis capacity. Moreover, our results support that beego under medical supervision can be implemented as non-invasive intervention for reducing thrombosis risk, and suggest several lines of intriguing inquiry for future studies about this fasting practice (http://www.chictr.org.cn/index.aspx, number, ChiCTR1900027451).
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Affiliation(s)
- Yixuan Fang
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
- State Key Laboratory of Radiation Medicine and Radioprotection, Soochow University, Suzhou, China
| | - Yue Gu
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Chen Zhao
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Yaqi Lv
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Jiawei Qian
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Lingjiang Zhu
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Na Yuan
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
- State Key Laboratory of Radiation Medicine and Radioprotection, Soochow University, Suzhou, China
| | - Suping Zhang
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
- State Key Laboratory of Radiation Medicine and Radioprotection, Soochow University, Suzhou, China
| | - Li Wang
- Soyo Center, Soochow University, Suzhou, China
- Department of Community Nursing, Soochow University, Suzhou, China
| | - Mengli Li
- Soyo Center, Soochow University, Suzhou, China
- Department of Community Nursing, Soochow University, Suzhou, China
| | - Qing Zhang
- Soyo Center, Soochow University, Suzhou, China
- Department of Kinesiology, Soochow University, Suzhou, China
| | - Li Xu
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Wen Wei
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Lei Li
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Li Ji
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Xueqin Gao
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Jingyi Zhang
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
- Department of Pharmacology, Soochow University, Suzhou, China
| | - Yueping Shen
- Soyo Center, Soochow University, Suzhou, China
- Department of Epidemiology and Biostatistics, Soochow University, Suzhou, China
| | - Zixing Chen
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
| | - Guanghui Wang
- Department of Pharmacology, Soochow University, Suzhou, China
| | - Kesheng Dai
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- State Key Laboratory of Radiation Medicine and Radioprotection, Soochow University, Suzhou, China
| | - Jianrong Wang
- Hematology Center of Cyrus Tang Medical Institute, Soochow University, Suzhou, China
- Soyo Center, Soochow University, Suzhou, China
- State Key Laboratory of Radiation Medicine and Radioprotection, Soochow University, Suzhou, China
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30
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Chang L, Yang HW, Lin TY, Yang KD. Perspective of Immunopathogenesis and Immunotherapies for Kawasaki Disease. Front Pediatr 2021; 9:697632. [PMID: 34350146 PMCID: PMC8326331 DOI: 10.3389/fped.2021.697632] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 06/22/2021] [Indexed: 12/13/2022] Open
Abstract
Kawasaki Disease (KD) is an acute inflammatory illness that mostly occurs in children below 5 years of age, with intractable fever, mucocutaneous lesions, lymphadenopathy, and lesions of the coronary artery (CAL). KD is sharing clinical symptoms with systemic inflammatory syndrome in children (MIS-C) which is related to COVID-19. Certain genes are identified to be associated with KD, but the findings usually differ between countries and races. Human Leukocyte Antigen (HLA) allele types and toll-like receptor (TLR) expression are also correlated to KD. The acute hyperinflammation in KD is mediated by an imbalance between augmented T helper 17 (Th17)/Th1 responses with high levels of interleukin (IL)-6, IL-10, IL-17A, IFN-γ, and IP-10, in contrast to reduced Th2/Treg responses with lower IL-4, IL-5, FoxP3, and TGF-β expression. KD has varying phenotypic variations regarding age, gender, intravenous immunoglobulin (IVIG) resistance, macrophage activation and shock syndrome. The signs of macrophage activation syndrome (MAS) can be interpreted as hyperferritinemia and thrombocytopenia contradictory to thrombocytosis in typical KD; the signs of KD with shock syndrome (KDSS) can be interpreted as overproduction of nitric oxide (NO) and coagulopathy. For over five decades, IVIG and aspirin are the standard treatment for KD. However, some KD patients are refractory to IVIG required additional medications against inflammation. Further studies are proposed to delineate the immunopathogenesis of IVIG-resistance and KDSS, to identify high risk patients with genetic susceptibility, and to develop an ideal treatment regimen, such as by providing idiotypic immunoglobulins to curb cytokine storms, NO overproduction, and the epigenetic induction of Treg function.
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Affiliation(s)
- Lung Chang
- Department of Pediatrics, MacKay Memorial Hospital, Taipei, Taiwan.,Division of Infectious Disease, MacKay Children's Hospital, Taipei, Taiwan.,Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan.,Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Horng-Woei Yang
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan
| | - Tang-Yu Lin
- Division of Allergy-Immunology-Rheumatology, MacKay Children's Hospital, Taipei, Taiwan
| | - Kuender D Yang
- Department of Pediatrics, MacKay Memorial Hospital, Taipei, Taiwan.,Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan.,Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.,Division of Allergy-Immunology-Rheumatology, MacKay Children's Hospital, Taipei, Taiwan.,Department of Microbiology & Immunology, National Defense Medical Center, Taipei, Taiwan.,Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
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31
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Faria AVS, Andrade SS, Peppelenbosch MP, Ferreira-Halder CV, Fuhler GM. The role of phospho-tyrosine signaling in platelet biology and hemostasis. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1868:118927. [PMID: 33310067 DOI: 10.1016/j.bbamcr.2020.118927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/01/2020] [Accepted: 12/05/2020] [Indexed: 10/22/2022]
Abstract
Platelets are small enucleated cell fragments specialized in the control of hemostasis, but also playing a role in angiogenesis, inflammation and immunity. This plasticity demands a broad range of physiological processes. Platelet functions are mediated through a variety of receptors, the concerted action of which must be tightly regulated, in order to allow specific and timely responses to different stimuli. Protein phosphorylation is one of the main key regulatory mechanisms by which extracellular signals are conveyed. Despite the importance of platelets in health and disease, the molecular pathways underlying the activation of these cells are still under investigation. Here, we review current literature on signaling platelet biology and in particular emphasize the newly emerging role of phosphatases in these processes.
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Affiliation(s)
- Alessandra V S Faria
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center Rotterdam, NL-3000 CA Rotterdam, the Netherlands; Department of Biochemistry and Tissue Biology, University of Campinas, UNICAMP, Campinas, SP 13083-862, Brazil
| | | | - Maikel P Peppelenbosch
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center Rotterdam, NL-3000 CA Rotterdam, the Netherlands
| | - Carmen V Ferreira-Halder
- Department of Biochemistry and Tissue Biology, University of Campinas, UNICAMP, Campinas, SP 13083-862, Brazil
| | - Gwenny M Fuhler
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center Rotterdam, NL-3000 CA Rotterdam, the Netherlands.
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32
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Chen Z, Zhou R, Zhang Y, Hao D, Wang Y, Huang S, Liu N, Xia C, Yissachar N, Huang F, Chu Y, Yan D. β-arrestin 2 quenches TLR signaling to facilitate the immune evasion of EPEC. Gut Microbes 2020; 11:1423-1437. [PMID: 32403971 PMCID: PMC7524320 DOI: 10.1080/19490976.2020.1759490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The protein translocated intimin receptor (Tir) from enteropathogenic Escherichia coli shares sequence similarity with the host cellular immunoreceptor tyrosine-based inhibition motifs (ITIMs). The ITIMs of Tir are required for Tir-mediated immune inhibition and evasion of host immune responses. However, the underlying molecular mechanism by which Tir regulates immune inhibition remains unclear. Here we demonstrated that β-arrestin 2, which is involved in the G-protein-coupled receptor (GPCR) signal pathway, interacted with Tir in an ITIM-dependent manner. For the molecular mechanism, we found that β-arrestin 2 enhanced the recruitment of SHP-1 to Tir. The recruited SHP-1 inhibited K63-linked ubiquitination of TRAF6 by dephosphorylating TRAF6 at Tyr288, and inhibited K63-linked ubiquitination and phosphorylation of TAK1 by dephosphorylating TAK1 at Tyr206, which cut off the downstream signal transduction and subsequent cytokine production. Moreover, the inhibitory effect of Tir on immune responses was diminished in β-arrestin 2-deficient mice and macrophages. These findings suggest that β-arrestin 2 is a key regulator in Tir-mediated immune evasion, which could serve as a new therapeutic target for bacterial infectious diseases.
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Affiliation(s)
- Zijuan Chen
- Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Ruixue Zhou
- Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Yihua Zhang
- Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Doudou Hao
- Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Yu Wang
- Department of Microbiology and Biochemical Pharmacy, National Engineering Research Centre of Immunological Products, College of Pharmacy, Third Military Medical University, Chongqing, China
| | - Shichao Huang
- Shanghai Key Laboratory of Signaling and Disease Research, Laboratory of Receptor-based Bio-medicine, the Collaborative Innovation Center for Brain Science, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Ningning Liu
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chunmei Xia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Nissan Yissachar
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, Israel
| | - Feng Huang
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Yiwei Chu
- Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Dapeng Yan
- Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai, China,CONTACT Dapeng Yan Department of Immunology, School of Basic Medical Sciences & Shanghai Public Health Clinical Center, Fudan University, Shanghai200032, China
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33
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Jutzi JS, Mullally A. Remodeling the Bone Marrow Microenvironment - A Proposal for Targeting Pro-inflammatory Contributors in MPN. Front Immunol 2020; 11:2093. [PMID: 32983162 PMCID: PMC7489333 DOI: 10.3389/fimmu.2020.02093] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 07/31/2020] [Indexed: 12/31/2022] Open
Abstract
Philadelphia-negative myeloproliferative neoplasms (MPN) are malignant bone marrow (BM) disorders, typically arising from a single somatically mutated hematopoietic stem cell. The most commonly mutated genes, JAK2, CALR, and MPL lead to constitutively active JAK-STAT signaling. Common clinical features include myeloproliferation, splenomegaly and constitutional symptoms. This review covers the contributions of cellular components of MPN pathology (e.g., monocytes, megakaryocytes, and mesenchymal stromal cells) as well as cytokines and soluble mediators to the development of myelofibrosis (MF) and highlights recent therapeutic advances. These findings outline the importance of malignant and non-malignant BM constituents to the pathogenesis and treatment of MF.
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Affiliation(s)
- Jonas Samuel Jutzi
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Ann Mullally
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States.,Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, United States.,Cancer Program, Broad Institute, Cambridge, MA, United States
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Wang J, Belosevic M, Stafford JL. Identification of goldfish (Carassius auratus L.) leukocyte immune-type receptors shows alternative splicing as a potential mechanism for receptor diversification. Mol Immunol 2020; 125:83-94. [PMID: 32652363 DOI: 10.1016/j.molimm.2020.06.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/15/2020] [Accepted: 06/20/2020] [Indexed: 12/31/2022]
Abstract
Leukocyte immune-type receptors (LITRs) are a multigene family of teleost immunoregulatory proteins that share structural, phylogenetic, and likely functional relationships with several innate immune receptor proteins in other vertebrates, including mammals. Originally discovered in channel catfish (Ictalurus punctatus), representative IpLITR-types have been shown to regulate diverse innate immune cell effector responses including phagocytosis, degranulation, and cytokine secretion. To date, IpLITRs have been primarily characterized using mammalian cell line expression systems, therefore many unanswered questions remain regarding their actual regulatory roles in fish immunity. In the present study, we report on the preliminary molecular characterization of five goldfish (Carassius auratus) CaLITR-types and the identification of several putative splice variants of these receptors cloned from various goldfish tissues and primary myeloid cell cultures. In general, CaLITR mRNA transcripts were detected in all goldfish tissues tested, and also in primary kidney macrophage and neutrophil cultures. Specifically, CaLITR1 is a functionally ambiguous receptor with no charged amino acids in its transmembrane (TM) segment and is devoid of tyrosine-based signaling motifs in its short cytoplasmic tail (CYT) region. CaLITR2 is a putative activating receptor-type that contains immunotyrosine-based activation motifs (ITAMs) within its long CYT region, and CaLITR3 has a positively charged TM segment, suggesting that it may recruit intracellular stimulatory adaptor signaling molecules. CaLITR4 and CaLITR5 appear to have diverse signaling capabilities since they contain various immunoregulatory signaling motifs within their CYT regions including putative Nck and STAT recruitment motifs as well as ITAM-like and ITIM sequences. We also identified putative CaLITR splice variants with altered extracellular Ig-like domain compositions and variable CYT regions. Interestingly, this suggests that alternative splicing-mediated diversification of CaLITRs can generate receptor forms with possible variable binding and/or intracellular signaling abilities. Overall, these findings reveal new information about the teleost LITRs and sets the stage for exploring how alternative splicing leads to the functional diversification of this complex multigene immunoregulatory receptor family.
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Affiliation(s)
- Jiahui Wang
- Department of Biological Sciences, University of Alberta, Alberta, Canada
| | - Miodrag Belosevic
- Department of Biological Sciences, University of Alberta, Alberta, Canada
| | - James L Stafford
- Department of Biological Sciences, University of Alberta, Alberta, Canada.
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35
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Effendi WI, Nagano T, Hasan H, Yudhawati R. Immunoregulatory Property of C-Type Lectin-Like Receptors in Fibrosing Interstitial Lung Diseases. Int J Mol Sci 2020; 21:E3665. [PMID: 32455964 PMCID: PMC7279300 DOI: 10.3390/ijms21103665] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 11/16/2022] Open
Abstract
The innate immune system identifies exogenous threats or endogenous stress through germline-encoded receptors called pattern recognition receptors (PRRs) that initiate consecutive downstream signaling pathways to control immune responses. However, the contribution of the immune system and inflammation to fibrosing interstitial lung diseases (ILD) remains poorly understood. Immunoreceptor tyrosine-based motif-bearing C-type lectin-like receptors (CTLRs) may interact with various immune cells during tissue injury and wound repair processes. Dectin-1 is a CTLR with dominant mechanisms manifested through its intracellular signaling cascades, which regulate fibrosis-promoting properties through gene transcription and cytokine activation. Additionally, immune impairment in ILD facilitates microbiome colonization; hence, Dectin-1 is the master protector in host pulmonary defense against fungal invasion. Recent progress in determining the signaling pathways that control the balance of fibrosis has implicated immunoreceptor tyrosine-based motif-bearing CTLRs as being involved, either directly or indirectly, in the pathogenesis of fibrosing ILD.
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Affiliation(s)
- Wiwin Is Effendi
- Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan;
- Department of Pulmonology and Respiratory Medicine, Medical Faculty of Airlangga University, Surabaya 60131, Indonesia; (H.H.); (R.Y.)
| | - Tatsuya Nagano
- Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan;
| | - Helmia Hasan
- Department of Pulmonology and Respiratory Medicine, Medical Faculty of Airlangga University, Surabaya 60131, Indonesia; (H.H.); (R.Y.)
| | - Resti Yudhawati
- Department of Pulmonology and Respiratory Medicine, Medical Faculty of Airlangga University, Surabaya 60131, Indonesia; (H.H.); (R.Y.)
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36
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Psaila B, Wang G, Rodriguez-Meira A, Li R, Heuston EF, Murphy L, Yee D, Hitchcock IS, Sousos N, O'Sullivan J, Anderson S, Senis YA, Weinberg OK, Calicchio ML, Iskander D, Royston D, Milojkovic D, Roberts I, Bodine DM, Thongjuea S, Mead AJ. Single-Cell Analyses Reveal Megakaryocyte-Biased Hematopoiesis in Myelofibrosis and Identify Mutant Clone-Specific Targets. Mol Cell 2020; 78:477-492.e8. [PMID: 32386542 PMCID: PMC7217381 DOI: 10.1016/j.molcel.2020.04.008] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 02/04/2020] [Accepted: 04/06/2020] [Indexed: 12/20/2022]
Abstract
Myelofibrosis is a severe myeloproliferative neoplasm characterized by increased numbers of abnormal bone marrow megakaryocytes that induce fibrosis, destroying the hematopoietic microenvironment. To determine the cellular and molecular basis for aberrant megakaryopoiesis in myelofibrosis, we performed single-cell transcriptome profiling of 135,929 CD34+ lineage- hematopoietic stem and progenitor cells (HSPCs), single-cell proteomics, genomics, and functional assays. We identified a bias toward megakaryocyte differentiation apparent from early multipotent stem cells in myelofibrosis and associated aberrant molecular signatures. A sub-fraction of myelofibrosis megakaryocyte progenitors (MkPs) are transcriptionally similar to healthy-donor MkPs, but the majority are disease specific, with distinct populations expressing fibrosis- and proliferation-associated genes. Mutant-clone HSPCs have increased expression of megakaryocyte-associated genes compared to wild-type HSPCs, and we provide early validation of G6B as a potential immunotherapy target. Our study paves the way for selective targeting of the myelofibrosis clone and illustrates the power of single-cell multi-omics to discover tumor-specific therapeutic targets and mediators of tissue fibrosis.
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Affiliation(s)
- Bethan Psaila
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK; Hematopoiesis Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-4442, USA.
| | - Guanlin Wang
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK; MRC WIMM Centre for Computational Biology, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK
| | - Alba Rodriguez-Meira
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK; MRC WIMM Centre for Computational Biology, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK
| | - Rong Li
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK
| | - Elisabeth F Heuston
- Hematopoiesis Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-4442, USA
| | - Lauren Murphy
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK
| | - Daniel Yee
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Ian S Hitchcock
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Nikolaos Sousos
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK
| | - Jennifer O'Sullivan
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK
| | - Stacie Anderson
- NHGRI Flow Cytometry Core, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-4442, USA
| | - Yotis A Senis
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche-S 1255, Etablissement Français du Sang Grand Est, Strasbourg 67065, France
| | - Olga K Weinberg
- Department of Pathology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Monica L Calicchio
- Department of Pathology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Deena Iskander
- Centre for Haematology, Hammersmith Hospital, Imperial College of Medicine, London W12 OHS, UK
| | - Daniel Royston
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DS, UK
| | - Dragana Milojkovic
- Centre for Haematology, Hammersmith Hospital, Imperial College of Medicine, London W12 OHS, UK
| | - Irene Roberts
- MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK; Department of Paediatrics, University of Oxford, Oxford OX3 9DU, UK
| | - David M Bodine
- Hematopoiesis Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-4442, USA
| | - Supat Thongjuea
- NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK; MRC WIMM Centre for Computational Biology, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK.
| | - Adam J Mead
- Haematopoietic Stem Cell Biology Laboratory, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford OX3 9DS, UK; MRC Molecular Haematology Unit, MRC WIMM, University of Oxford, Oxford OX3 9DS, UK; NIHR Biomedical Research Centre, University of Oxford, Oxford OX4 2PG, UK.
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37
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Meza Guzman LG, Keating N, Nicholson SE. Natural Killer Cells: Tumor Surveillance and Signaling. Cancers (Basel) 2020; 12:cancers12040952. [PMID: 32290478 PMCID: PMC7226588 DOI: 10.3390/cancers12040952] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/03/2020] [Accepted: 04/09/2020] [Indexed: 12/17/2022] Open
Abstract
Natural killer (NK) cells play a pivotal role in cancer immunotherapy due to their innate ability to detect and kill tumorigenic cells. The decision to kill is determined by the expression of a myriad of activating and inhibitory receptors on the NK cell surface. Cell-to-cell engagement results in either self-tolerance or a cytotoxic response, governed by a fine balance between the signaling cascades downstream of the activating and inhibitory receptors. To evade a cytotoxic immune response, tumor cells can modulate the surface expression of receptor ligands and additionally, alter the conditions in the tumor microenvironment (TME), tilting the scales toward a suppressed cytotoxic NK response. To fully harness the killing power of NK cells for clinical benefit, we need to understand what defines the threshold for activation and what is required to break tolerance. This review will focus on the intracellular signaling pathways activated or suppressed in NK cells and the roles signaling intermediates play during an NK cytotoxic response.
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Affiliation(s)
- Lizeth G. Meza Guzman
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia;
- Department of Medical Biology, The University of Melbourne, Parkville, VIC 3010, Australia
- Correspondence: (L.G.M.G.); (S.E.N.); Tel.: +61-9345-2555 (S.E.N.)
| | - Narelle Keating
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia;
- Department of Medical Biology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Sandra E. Nicholson
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia;
- Department of Medical Biology, The University of Melbourne, Parkville, VIC 3010, Australia
- Correspondence: (L.G.M.G.); (S.E.N.); Tel.: +61-9345-2555 (S.E.N.)
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38
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The Cell Cycle Checkpoint System MAST(L)-ENSA/ARPP19-PP2A is Targeted by cAMP/PKA and cGMP/PKG in Anucleate Human Platelets. Cells 2020; 9:cells9020472. [PMID: 32085646 PMCID: PMC7072724 DOI: 10.3390/cells9020472] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/14/2020] [Accepted: 02/14/2020] [Indexed: 12/13/2022] Open
Abstract
The cell cycle is controlled by microtubule-associated serine/threonine kinase-like (MASTL), which phosphorylates the cAMP-regulated phosphoproteins 19 (ARPP19) at S62 and 19e/α-endosulfine (ENSA) at S67and converts them into protein phosphatase 2A (PP2A) inhibitors. Based on initial proteomic data, we hypothesized that the MASTL-ENSA/ARPP19-PP2A pathway, unknown until now in platelets, is regulated and functional in these anucleate cells. We detected ENSA, ARPP19 and various PP2A subunits (including seven different PP2A B-subunits) in proteomic studies of human platelets. ENSA-S109/ARPP19–S104 were efficiently phosphorylated in platelets treated with cAMP- (iloprost) and cGMP-elevating (NO donors/riociguat) agents. ENSA-S67/ARPP19-S62 phosphorylations increased following PP2A inhibition by okadaic acid (OA) in intact and lysed platelets indicating the presence of MASTL or a related protein kinase in human platelets. These data were validated with recombinant ENSA/ARPP19 and phospho-mutants using recombinant MASTL, protein kinase A and G. Both ARPP19 phosphorylation sites S62/S104 were dephosphorylated by platelet PP2A, but only S62-phosphorylated ARPP19 acted as PP2A inhibitor. Low-dose OA treatment of platelets caused PP2A inhibition, diminished thrombin-stimulated platelet aggregation and increased phosphorylation of distinct sites of VASP, Akt, p38 and ERK1/2 MAP kinases. In summary, our data establish the entire MASTL(like)–ENSA/ARPP19–PP2A pathway in human platelets and important interactions with the PKA, MAPK and PI3K/Akt systems.
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39
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Zhi H, Kanaji T, Fu G, Newman DK, Newman PJ. Generation of PECAM-1 (CD31) conditional knockout mice. Genesis 2019; 58:e23346. [PMID: 31729819 DOI: 10.1002/dvg.23346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/17/2019] [Accepted: 10/17/2019] [Indexed: 12/18/2022]
Abstract
Platelet endothelial cell adhesion molecule 1 (PECAM-1) is an adhesion and signaling receptor that is expressed on endothelial and hematopoietic cells and plays important roles in angiogenesis, vascular permeability, and regulation of cellular responsiveness. To better understanding the tissue specificity of PECAM-1 functions, we generated mice in which PECAM1, the gene encoding PECAM-1, could be conditionally knocked out. A targeting construct was created that contains loxP sites flanking PECAM1 exons 1 and 2 and a neomycin resistance gene flanked by flippase recognition target (FRT) sites that was positioned upstream of the 3' loxP site. The targeting construct was electroporated into C57BL/6 embryonic stem (ES) cells, and correctly targeted ES cells were injected into C57BL/6 blastocysts, which were implanted into pseudo-pregnant females. Resulting chimeric animals were bred with transgenic mice expressing Flippase 1 (FLP1) to remove the FRT-flanked neomycin resistance gene and mice heterozygous for the floxed PECAM1 allele were bred with each other to obtain homozygous PECAM1 flox/flox offspring, which expressed PECAM-1 at normal levels and had no overt phenotype. PECAM1 flox/flox mice were bred with mice expressing Cre recombinase under the control of the SRY-box containing gene 2 (Sox2Cre) promoter to delete the floxed PECAM1 allele in offspring (Sox2Cre;PECAM1 del/WT ), which were crossbred to generate Sox2Cre; PECAM1 del/del offspring. Sox2Cre; PECAM1 del/del mice recapitulated the phenotype of conventional global PECAM-1 knockout mice. PECAM1 flox/flox mice will be useful for studying distinct roles of PECAM-1 in tissue specific contexts and to gain insights into the roles that PECAM-1 plays in blood and vascular cell function.
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Affiliation(s)
- Huiying Zhi
- Blood Research Institute, Versiti, Milwaukee, Wisconsin
| | | | - Guoping Fu
- Blood Research Institute, Versiti, Milwaukee, Wisconsin
| | - Debra K Newman
- Blood Research Institute, Versiti, Milwaukee, Wisconsin.,Department of Pharmacology & Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Peter J Newman
- Blood Research Institute, Versiti, Milwaukee, Wisconsin.,Department of Pharmacology & Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin
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40
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Vögtle T, Sharma S, Mori J, Nagy Z, Semeniak D, Scandola C, Geer MJ, Smith CW, Lane J, Pollack S, Lassila R, Jouppila A, Barr AJ, Ogg DJ, Howard TD, McMiken HJ, Warwicker J, Geh C, Rowlinson R, Abbott WM, Eckly A, Schulze H, Wright GJ, Mazharian A, Fütterer K, Rajesh S, Douglas MR, Senis YA. Heparan sulfates are critical regulators of the inhibitory megakaryocyte-platelet receptor G6b-B. eLife 2019; 8:e46840. [PMID: 31436532 PMCID: PMC6742478 DOI: 10.7554/elife.46840] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/21/2019] [Indexed: 02/06/2023] Open
Abstract
The immunoreceptor tyrosine-based inhibition motif (ITIM)-containing receptor G6b-B is critical for platelet production and activation. Loss of G6b-B results in severe macrothrombocytopenia, myelofibrosis and aberrant platelet function in mice and humans. Using a combination of immunohistochemistry, affinity chromatography and proteomics, we identified the extracellular matrix heparan sulfate (HS) proteoglycan perlecan as a G6b-B binding partner. Subsequent in vitro biochemical studies and a cell-based genetic screen demonstrated that the interaction is specifically mediated by the HS chains of perlecan. Biophysical analysis revealed that heparin forms a high-affinity complex with G6b-B and mediates dimerization. Using platelets from humans and genetically modified mice, we demonstrate that binding of G6b-B to HS and multivalent heparin inhibits platelet and megakaryocyte function by inducing downstream signaling via the tyrosine phosphatases Shp1 and Shp2. Our findings provide novel insights into how G6b-B is regulated and contribute to our understanding of the interaction of megakaryocytes and platelets with glycans.
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Affiliation(s)
- Timo Vögtle
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Sumana Sharma
- Cell Surface Signalling LaboratoryWellcome Trust Sanger InstituteCambridgeUnited Kingdom
| | - Jun Mori
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Zoltan Nagy
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Daniela Semeniak
- Institute of Experimental BiomedicineUniversity Hospital WürzburgWürzburgGermany
| | - Cyril Scandola
- Université de Strasbourg, Institut National de la Santé et de la Recherche Médicale, Etablissement Français du Sang Grand Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de StrasbourgStrasbourgFrance
| | - Mitchell J Geer
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Christopher W Smith
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Jordan Lane
- Sygnature Discovery LimitedNottinghamUnited Kingdom
| | | | - Riitta Lassila
- Coagulation Disorders Unit, Department of Hematology, Comprehensive Cancer CenterUniversity of Helsinki, Helsinki University HospitalHelsinkiFinland
- Aplagon OyHelsinkiFinland
| | - Annukka Jouppila
- Coagulation Disorders UnitHelsinki University Hospital Research InstituteHelsinkiFinland
| | - Alastair J Barr
- Department of Biomedical Science, Faculty of Science & TechnologyUniversity of WestminsterLondonUnited Kingdom
| | - Derek J Ogg
- Peak Proteins LimitedAlderley ParkCheshireUnited Kingdom
| | - Tina D Howard
- Peak Proteins LimitedAlderley ParkCheshireUnited Kingdom
| | | | - Juli Warwicker
- Peak Proteins LimitedAlderley ParkCheshireUnited Kingdom
| | - Catherine Geh
- Peak Proteins LimitedAlderley ParkCheshireUnited Kingdom
| | | | - W Mark Abbott
- Peak Proteins LimitedAlderley ParkCheshireUnited Kingdom
| | - Anita Eckly
- Université de Strasbourg, Institut National de la Santé et de la Recherche Médicale, Etablissement Français du Sang Grand Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de StrasbourgStrasbourgFrance
| | - Harald Schulze
- Institute of Experimental BiomedicineUniversity Hospital WürzburgWürzburgGermany
| | - Gavin J Wright
- Cell Surface Signalling LaboratoryWellcome Trust Sanger InstituteCambridgeUnited Kingdom
| | - Alexandra Mazharian
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Klaus Fütterer
- School of Biosciences, College of Life and Environmental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Sundaresan Rajesh
- Institute of Cancer and Genomic Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
| | - Michael R Douglas
- Institute of Inflammation and Ageing, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
- Department of NeurologyDudley Group NHS Foundation TrustDudleyUnited Kingdom
- School of Life and Health SciencesAston UniversityBirminghamUnited Kingdom
| | - Yotis A Senis
- Institute of Cardiovascular Sciences, College of Medical and Dental SciencesUniversity of BirminghamBirminghamUnited Kingdom
- Université de Strasbourg, Institut National de la Santé et de la Recherche Médicale, Etablissement Français du Sang Grand Est, Unité Mixte de Recherche-S 1255, Fédération de Médecine Translationnelle de StrasbourgStrasbourgFrance
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41
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Nagy M, van Geffen JP, Stegner D, Adams DJ, Braun A, de Witt SM, Elvers M, Geer MJ, Kuijpers MJE, Kunzelmann K, Mori J, Oury C, Pircher J, Pleines I, Poole AW, Senis YA, Verdoold R, Weber C, Nieswandt B, Heemskerk JWM, Baaten CCFMJ. Comparative Analysis of Microfluidics Thrombus Formation in Multiple Genetically Modified Mice: Link to Thrombosis and Hemostasis. Front Cardiovasc Med 2019; 6:99. [PMID: 31417909 PMCID: PMC6682619 DOI: 10.3389/fcvm.2019.00099] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/03/2019] [Indexed: 12/15/2022] Open
Abstract
Genetically modified mice are indispensable for establishing the roles of platelets in arterial thrombosis and hemostasis. Microfluidics assays using anticoagulated whole blood are commonly used as integrative proxy tests for platelet function in mice. In the present study, we quantified the changes in collagen-dependent thrombus formation for 38 different strains of (genetically) modified mice, all measured with the same microfluidics chamber. The mice included were deficient in platelet receptors, protein kinases or phosphatases, small GTPases or other signaling or scaffold proteins. By standardized re-analysis of high-resolution microscopic images, detailed information was obtained on altered platelet adhesion, aggregation and/or activation. For a subset of 11 mouse strains, these platelet functions were further evaluated in rhodocytin- and laminin-dependent thrombus formation, thus allowing a comparison of glycoprotein VI (GPVI), C-type lectin-like receptor 2 (CLEC2) and integrin α6β1 pathways. High homogeneity was found between wild-type mice datasets concerning adhesion and aggregation parameters. Quantitative comparison for the 38 modified mouse strains resulted in a matrix visualizing the impact of the respective (genetic) deficiency on thrombus formation with detailed insight into the type and extent of altered thrombus signatures. Network analysis revealed strong clusters of genes involved in GPVI signaling and Ca2+ homeostasis. The majority of mice demonstrating an antithrombotic phenotype in vivo displayed with a larger or smaller reduction in multi-parameter analysis of collagen-dependent thrombus formation in vitro. Remarkably, in only approximately half of the mouse strains that displayed reduced arterial thrombosis in vivo, this was accompanied by impaired hemostasis. This was also reflected by comparing in vitro thrombus formation (by microfluidics) with alterations in in vivo bleeding time. In conclusion, the presently developed multi-parameter analysis of thrombus formation using microfluidics can be used to: (i) determine the severity of platelet abnormalities; (ii) distinguish between altered platelet adhesion, aggregation and activation; and (iii) elucidate both collagen and non-collagen dependent alterations of thrombus formation. This approach may thereby aid in the better understanding and better assessment of genetic variation that affect in vivo arterial thrombosis and hemostasis.
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Affiliation(s)
- Magdolna Nagy
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - Johanna P van Geffen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - David Stegner
- Rudolf Virchow Center, Institute of Experimental Biomedicine, University Hospital Würzburg, University of Würzburg, Würzburg, Germany
| | - David J Adams
- Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - Attila Braun
- Rudolf Virchow Center, Institute of Experimental Biomedicine, University Hospital Würzburg, University of Würzburg, Würzburg, Germany
| | - Susanne M de Witt
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - Margitta Elvers
- Department of Vascular Surgery, Experimental Vascular Medicine, Heinrich Heine University, Düsseldorf, Germany
| | - Mitchell J Geer
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Marijke J E Kuijpers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - Karl Kunzelmann
- Institute of Physiology, University of Regensburg, Regensburg, Germany
| | - Jun Mori
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Cécile Oury
- GIGA-Cardiovascular Sciences, University of Liège, Liège, Belgium
| | - Joachim Pircher
- Medizinische Klinik und Poliklinik I, Klinikum der Universität München, Ludwig-Maximilians-University, and DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Irina Pleines
- Rudolf Virchow Center, Institute of Experimental Biomedicine, University Hospital Würzburg, University of Würzburg, Würzburg, Germany
| | - Alastair W Poole
- Department of Physiology and Pharmacology, School of Medical Sciences, University of Bristol, Bristol, United Kingdom
| | - Yotis A Senis
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Remco Verdoold
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - Christian Weber
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands.,Institute for Cardiovascular Prevention (IPEK), Ludwig-Maximilians-Universität München, Munich, Germany
| | - Bernhard Nieswandt
- Rudolf Virchow Center, Institute of Experimental Biomedicine, University Hospital Würzburg, University of Würzburg, Würzburg, Germany
| | - Johan W M Heemskerk
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands
| | - Constance C F M J Baaten
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Netherlands.,Institute for Molecular Cardiovascular Research (IMCAR), University Hospital Aachen, Aachen, Germany
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42
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TREM-like transcript 1: a more sensitive marker of platelet activation than P-selectin in humans and mice. Blood Adv 2019; 2:2072-2078. [PMID: 30120105 DOI: 10.1182/bloodadvances.2018017756] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 07/20/2018] [Indexed: 01/19/2023] Open
Abstract
Key Points
Platelet activation in vitro results in a more rapid and greater upregulation of TLT-1 surface expression compared with P-selectin. TLT-1 is more rapidly translocated to the surface of activated platelets than P-selectin during thrombus formation in vivo.
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43
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Kuriri FA, O'Malley CJ, Jackson DE. Molecular mechanisms of immunoreceptors in platelets. Thromb Res 2019; 176:108-114. [DOI: 10.1016/j.thromres.2019.01.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/20/2019] [Accepted: 01/28/2019] [Indexed: 01/05/2023]
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44
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Rayes J, Watson SP, Nieswandt B. Functional significance of the platelet immune receptors GPVI and CLEC-2. J Clin Invest 2019; 129:12-23. [PMID: 30601137 DOI: 10.1172/jci122955] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Although platelets are best known for their role in hemostasis, they are also crucial in development, host defense, inflammation, and tissue repair. Many of these roles are regulated by the immune-like receptors glycoprotein VI (GPVI) and C-type lectin receptor 2 (CLEC-2), which signal through an immunoreceptor tyrosine-based activation motif (ITAM). GPVI is activated by collagen in the subendothelial matrix, by fibrin and fibrinogen in the thrombus, and by a remarkable number of other ligands. CLEC-2 is activated by the transmembrane protein podoplanin, which is found outside of the vasculature and is upregulated in development, inflammation, and cancer, but there is also evidence for additional ligands. In this Review, we discuss the physiological and pathological roles of CLEC-2 and GPVI and their potential as targets in thrombosis and thrombo-inflammatory disorders (i.e., disorders in which inflammation plays a critical role in the ensuing thrombosis) relative to current antiplatelet drugs.
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Affiliation(s)
- Julie Rayes
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Steve P Watson
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, United Kingdom
| | - Bernhard Nieswandt
- Institute of Experimental Biomedicine, University Hospital and Rudolf Virchow Center, University of Würzburg, Würzburg, Germany
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45
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46
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47
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Martyanov AA, Kaneva VN, Panteleev MA, Sveshnikova AN. Physiological and pathophysiological aspects of blood platelet activation through CLEC-2 receptor. ONCOHEMATOLOGY 2018. [DOI: 10.17650/1818-8346-2018-13-3-83-90] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Platelet activating receptor CLEC-2 has been identified on platelet surface a decade ago. The only confirmed endogenous CLEC-2 agonist is podoplanin. Podoplanin is a transmembrane protein expressed by lymphatic endothelial cells, reticular fibroblastic cells in lymph nodes, kidney podocytes and by cells of certain tumors. Association of CLEC-2 with podoplanin is involved in processes of embryonic development (blood-lymph vessel separation and angiogenesis), maintaining of vascular integrity of small vessels during inflammation and prevention of blood-lymphatic mixing in high endothelial venules. However, CLEC-2 and podoplanin are contributing to tumor metastasis progression, Salmonella sepsis and deep-vein thrombosis. This makes CLEC-2 and podoplanin a perspective target for pharmacological treatment. Aspirin and Ibrutinib are considered to be perspective for abrogation of podoplanin-induced platelet activation via CLEC-2. The present review discusses already known pathological and physiological roles of CLEC-2 and possibilities of a targeted therapy for CLEC-2 associated diseases.
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Affiliation(s)
- A. A. Martyanov
- Dmitry Rogachev National Medical Research Centre of Pediatric Hematology, Oncology and Immunology; Lomonosov Moscow State University, Faculty of Physics; Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences
| | - V. N. Kaneva
- Dmitry Rogachev National Medical Research Centre of Pediatric Hematology, Oncology and Immunology; Lomonosov Moscow State University, Faculty of Physics
| | - M. A. Panteleev
- Dmitry Rogachev National Medical Research Centre of Pediatric Hematology, Oncology and Immunology; Lomonosov Moscow State University, Faculty of Physics; Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences; Moscow Institute of Physics and Technology (State University), Faculty of Biological and Medical Physics
| | - A. N. Sveshnikova
- Dmitry Rogachev National Medical Research Centre of Pediatric Hematology, Oncology and Immunology; Lomonosov Moscow State University, Faculty of Physics; Center for Theoretical Problems of Physicochemical Pharmacology, Russian Academy of Sciences
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48
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Jessica MO, Fiorella R, Ocatavio S, Linnette R, Nahomy L, Kanth MB, Bismarck M, Rondina MT, Valance WA. TLT-1-CONTROLS EARLY THROMBUS FORMATION AND STABILITY BY FACILITATING AIIBB3 OUTSIDE-IN SIGNALING IN MICE. ACTA ACUST UNITED AC 2018; 6:1143-1149. [PMID: 30931337 DOI: 10.21474/ijar01/7469] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Platelets regulate inflammation as well as hemostasis. Inflammatory insults often induce hemostatic function through mechanisms that are not always understood. The triggering receptor expressed in myeloid cells (TREM)-like transcript 1 (TLT-1) is an abundantly expressed platelet receptor and its deletion leads to hemorrhage and edema after lipopolysaccharide and TNF-α treatment. To define a role for TLT-1 in immune derived bleeding we used a CXCL-2 mediated local inflammatory reaction in the vessels of the cremaster muscle of treml1 -/- and wild type mice. Our whole mount immunofluorescent staining of the cremaster muscle demonstrated a 50% reduction in clot size and increased extravasation of plasma molecules in treml1 -/- mice compared to wild type. We demonstrate that the decreased clotting in treml1 -/- mice is associated with a 2X reduction in integrin β3 phosphorylation on residue Y773 after platelet activation, which is consistent with treml1 -/- mice displaying reduced outside-in signaling and smaller thrombi. We further substantiate TLT-1's role in the regulation of immune derived bleeding using the reverse arthus reaction and demonstrate TLT-1's role in thrombosis using the thromboplastin initiated and collagen/epinephrine models of pulmonary embolism. Thus, the data presented here demonstrate that TLT-1 regulates early clot formation though the stabilization of αIIbβ3 outside-in signaling.
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Affiliation(s)
| | - Reyes Fiorella
- Laboratory of Anatomy and Cell Biology, Universidad Central del Caribe, Bayamón PR
| | - Santiago Ocatavio
- Laboratory of Anatomy and Cell Biology, Universidad Central del Caribe, Bayamón PR
| | - Rivera Linnette
- Laboratory of Anatomy and Cell Biology, Universidad Central del Caribe, Bayamón PR
| | - Ledesma Nahomy
- University of Puerto Rico-Rio Piedras, Department of Biology
| | - Manne B Kanth
- Molecular Medicine Program and Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah
| | - Madera Bismarck
- University of Puerto Rico-Rio Piedras, Department of Biology
| | - Matthew T Rondina
- Molecular Medicine Program and Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah.,Department of Medicine and the George E. Whalen VAMC GRECC; Salt Lake City, Utah
| | - Washington A Valance
- University of Puerto Rico-Rio Piedras, Department of Biology.,Laboratory of Anatomy and Cell Biology, Universidad Central del Caribe, Bayamón PR
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49
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Chen J, Verni CC, Jouppila A, Lassila R, Diamond SL. Dual antiplatelet and anticoagulant (APAC) heparin proteoglycan mimetic with shear-dependent effects on platelet-collagen binding and thrombin generation. Thromb Res 2018; 169:143-151. [PMID: 30071479 DOI: 10.1016/j.thromres.2018.07.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/28/2018] [Accepted: 07/24/2018] [Indexed: 11/16/2022]
Abstract
Heparin proteoglycans (HEP-PGs) carry standard heparin-mediated anticoagulant properties as well as novel antiplatelet functions, a combination that may be significant for targeting multiple pathways in a single therapy. Recent work developing semisynthetic HEP-PG mimetics has shown promising results also in vivo, however flow conditions in vitro that replicate in vivo hemodynamics have not been reported. In this work, we present several assays (platelet calcium mobilization, aggregometry, microfluidic tests at venous and arterial hemodynamics) to characterize specific mechanistic effects of dual antiplatelet and anticoagulant (APAC) constructs as mimetics of HEP-PGs. Three APACs with different conjugation levels of heparin chains (CL10, CL18, HICL) were shown to decrease platelet deposition to collagen surfaces in PPACK-treated whole blood at venous shear rate (200 s-1). FXIIa-inhibited whole blood (CTI: corn trypsin inhibitor, 40 μg/mL) perfused over collagen/tissue factor showed reduced both platelet and fibrin deposition when treated with APACs. IC50 values for platelet and fibrin inhibition were calculated for each molecule at venous shear rate. Increasing the shear rate to arterial flows (1000 s-1) and using APAC as the sole anticoagulant, resulted in a more potent antiplatelet effect of APAC, suggesting an added effect on von Willebrand Factor (vWF) function. Additionally, APAC caused an inhibition of calcium mobilization specific to thrombin and collagen stimulation and a dose-dependent reduction in collagen-mediated platelet aggregation. Understanding the sensitivity of APAC activity to shear rate, platelet signaling and procoagulant pathways is important for applications in which APAC administration may have beneficial therapeutic effects.
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Affiliation(s)
- Jason Chen
- Department of Chemical and Biomolecular Engineering, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Christopher C Verni
- Department of Chemical and Biomolecular Engineering, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Annukka Jouppila
- Helsinki University Central Hospital Research Institute, Helsinki, Finland
| | - Riitta Lassila
- Coagulation Disorders Unit, University of Helsinki, Departments of Hematology and Clinical Chemistry (HUSLAB Laboratory Services), Comprehensive Cancer Center, Helsinki University Hospital, Helsinki, Finland; Aplagon Oy, Helsinki, Finland
| | - Scott L Diamond
- Department of Chemical and Biomolecular Engineering, Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA.
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50
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Blair TA, Michelson AD, Frelinger AL. Mass Cytometry Reveals Distinct Platelet Subtypes in Healthy Subjects and Novel Alterations in Surface Glycoproteins in Glanzmann Thrombasthenia. Sci Rep 2018; 8:10300. [PMID: 29985398 PMCID: PMC6037710 DOI: 10.1038/s41598-018-28211-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 06/19/2018] [Indexed: 01/19/2023] Open
Abstract
Mass cytometry (MC) uses mass spectrometry to simultaneously detect multiple metal-conjugated antibodies on single cells, thereby enabling the detailed study of cellular function. Here, for the first time, we applied MC to the analysis of platelets. We developed a panel of 14 platelet-specific metal-tagged antibodies (targeting cluster of differentiation [CD] 9, CD29, CD31, CD36, CD41, CD42a, CD42b, CD61, CD62P, CD63, CD107a, CD154, glycoprotein [GP] VI and activated integrin αIIbβ3) and compared this panel with two fluorescence flow cytometry (FFC) panels (CD41, CD42b, and CD61; or CD42b, CD62P, and activated integrin αIIbβ3) in the evaluation of activation-dependent changes in glycoprotein expression on healthy subject and Glanzmann thrombasthenia (GT) platelets. High-dimensional analysis of surface markers detected by MC identified previously unappreciated subpopulations of platelets in healthy donors. As expected, MC and FFC revealed that GT platelets had significantly reduced CD41, CD61, and activated integrin αIIbβ3 surface expression. MC also revealed that surface expression of CD9, CD42a and CD63 were elevated, CD31, CD154 and GPVI were reduced and CD29, CD36, CD42b, CD62P and CD107a were similar on GT platelets compared to healthy donor platelets. In summary, MC revealed distinct platelet subtypes in healthy subjects and novel alterations in surface glycoproteins on GT platelets.
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Affiliation(s)
- Thomas A Blair
- Center for Platelet Research Studies, Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, MA, USA
| | - Alan D Michelson
- Center for Platelet Research Studies, Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, MA, USA
| | - Andrew L Frelinger
- Center for Platelet Research Studies, Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, MA, USA.
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