1
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Kaur S, Roberts DD. Emerging functions of thrombospondin-1 in immunity. Semin Cell Dev Biol 2024; 155:22-31. [PMID: 37258315 PMCID: PMC10684827 DOI: 10.1016/j.semcdb.2023.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 05/24/2023] [Indexed: 06/02/2023]
Abstract
Thrombospondin-1 is a secreted matricellular glycoprotein that modulates cell behavior by interacting with components of the extracellular matrix and with several cell surface receptors. Its presence in the extracellular matrix is induced by injuries that cause thrombospondin-1 release from platelets and conditions including hyperglycemia, ischemia, and aging that stimulate its expression by many cell types. Conversely, rapid receptor-mediated clearance of thrombospondin-1 from the extracellular space limits its sustained presence in the extracellular space and maintains sub-nanomolar physiological concentrations in blood plasma. Roles for thrombospondin-1 signaling, mediated by specific cellular receptors or by activation of latent TGFβ, have been defined in T and B lymphocytes, natural killer cells, macrophages, neutrophils, and dendritic cells. In addition to regulating physiological nitric oxide signaling and responses of cells to stress, studies in mice lacking thrombospondin-1 or its receptors have revealed important roles for thrombospondin-1 in regulating immune responses in infectious and autoimmune diseases and antitumor immunity.
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Affiliation(s)
- Sukhbir Kaur
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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2
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Wang Z, Shang J, Qiu Y, Cheng H, Tao M, Xie E, Pei X, Li W, Zhang L, Wu A, Li G. Suppression of the METTL3-m 6A-integrin β1 axis by extracellular acidification impairs T cell infiltration and antitumor activity. Cell Rep 2024; 43:113796. [PMID: 38367240 DOI: 10.1016/j.celrep.2024.113796] [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: 10/02/2023] [Revised: 12/28/2023] [Accepted: 01/31/2024] [Indexed: 02/19/2024] Open
Abstract
The acidic metabolic byproducts within the tumor microenvironment (TME) hinder T cell effector functions. However, their effects on T cell infiltration remain largely unexplored. Leveraging the comprehensive The Cancer Genome Atlas dataset, we pinpoint 16 genes that correlate with extracellular acidification and establish a metric known as the "tumor acidity (TuAci) score" for individual patients. We consistently observe a negative association between the TuAci score and T lymphocyte score (T score) across various human cancer types. Mechanistically, extracellular acidification significantly impedes T cell motility by suppressing podosome formation. This phenomenon can be attributed to the reduced expression of methyltransferase-like 3 (METTL3) and the modification of RNA N6-methyladenosine (m6A), resulting in a subsequent decrease in the expression of integrin β1 (ITGB1). Importantly, enforced ITGB1 expression leads to enhanced T cell infiltration and improved antitumor activity. Our study suggests that modulating METTL3 activity or boosting ITGB1 expression could augment T cell infiltration within the acidic TME, thereby improving the efficacy of cell therapy.
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Affiliation(s)
- Zhe Wang
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Jingzhe Shang
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Yajing Qiu
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Hongcheng Cheng
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Mengyuan Tao
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Ermei Xie
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Xin Pei
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Wenhui Li
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China
| | - Lianjun Zhang
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China.
| | - Aiping Wu
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China.
| | - Guideng Li
- National Key Laboratory of Immunity and Inflammation, and CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Suzhou Institute of Systems Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Suzhou 215123, China.
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3
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Pan Q, Chen C, Yang YJ. Top Five Stories of the Cellular Landscape and Therapies of Atherosclerosis: Current Knowledge and Future Perspectives. Curr Med Sci 2024; 44:1-27. [PMID: 38057537 DOI: 10.1007/s11596-023-2818-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 10/22/2023] [Indexed: 12/08/2023]
Abstract
Atherosclerosis (AS) is characterized by impairment and apoptosis of endothelial cells, continuous systemic and focal inflammation and dysfunction of vascular smooth muscle cells, which is documented as the traditional cellular paradigm. However, the mechanisms appear much more complicated than we thought since a bulk of studies on efferocytosis, transdifferentiation and novel cell death forms such as ferroptosis, pyroptosis, and extracellular trap were reported. Discovery of novel pathological cellular landscapes provides a large number of therapeutic targets. On the other side, the unsatisfactory therapeutic effects of current treatment with lipid-lowering drugs as the cornerstone also restricts the efforts to reduce global AS burden. Stem cell- or nanoparticle-based strategies spurred a lot of attention due to the attractive therapeutic effects and minimized adverse effects. Given the complexity of pathological changes of AS, attempts to develop an almighty medicine based on single mechanisms could be theoretically challenging. In this review, the top stories in the cellular landscapes during the initiation and progression of AS and the therapies were summarized in an integrated perspective to facilitate efforts to develop a multi-targets strategy and fill the gap between mechanism research and clinical translation. The future challenges and improvements were also discussed.
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Affiliation(s)
- Qi Pan
- State Key Laboratory of Cardiovascular Disease, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100037, China
| | - Cheng Chen
- State Key Laboratory of Cardiovascular Disease, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100037, China
| | - Yue-Jin Yang
- State Key Laboratory of Cardiovascular Disease, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100037, China.
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4
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Yu M, Cheng X. Editorial Commentary: Top Five Stories of the Cellular Landscape and Therapies of Atherosclerosis: Current Knowledge and Future Perspectives. Curr Med Sci 2024; 44:241-243. [PMID: 38277018 DOI: 10.1007/s11596-023-2825-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Affiliation(s)
- Miao Yu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Hubei Provincial Engineering Research Center of Immunological Diagnosis and Therapy for Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xiang Cheng
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
- Hubei Provincial Engineering Research Center of Immunological Diagnosis and Therapy for Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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5
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Isenberg JS, Montero E. Tolerating CD47. Clin Transl Med 2024; 14:e1584. [PMID: 38362603 PMCID: PMC10870051 DOI: 10.1002/ctm2.1584] [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: 11/19/2023] [Revised: 01/22/2024] [Accepted: 01/30/2024] [Indexed: 02/17/2024] Open
Abstract
Cluster of differentiation 47 (CD47) occupies the outer membrane of human cells, where it binds to soluble and cell surface receptors on the same and other cells, sculpting their topography and resulting in a pleiotropic receptor-multiligand interaction network. It is a focus of drug development to temper and accentuate CD47-driven immune cell liaisons, although consideration of on-target CD47 effects remain neglected. And yet, a late clinical trial of a CD47-blocking antibody was discontinued, existent trials were restrained, and development of CD47-targeting agents halted by some pharmaceutical companies. At this point, if CD47 can be exploited for clinical advantage remains to be determined. Herein an airing is made of the seemingly conflicting actions of CD47 that reflect its position as a junction connecting receptors and signalling pathways that impact numerous human cell types. Prospects of CD47 boosting and blocking are considered along with potential therapeutic implications for autoimmune diseases and cancer.
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Affiliation(s)
- Jeffrey S. Isenberg
- Department of Diabetes Complications & MetabolismArthur Riggs Diabetes & Metabolism Research InstituteCity of Hope National Medical CenterDuarteCaliforniaUSA
| | - Enrique Montero
- Department of Molecular & Cellular EndocrinologyArthur Riggs Diabetes & Metabolism Research InstituteCity of Hope National Medical CenterDuarteCaliforniaUSA
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6
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Zhao Y, Fang L, Guo P, Fang Y, Wu J. A MD Simulation Prediction for Regulation of N-Terminal Modification on Binding of CD47 to CD172a in a Force-Dependent Manner. Molecules 2023; 28:molecules28104224. [PMID: 37241964 DOI: 10.3390/molecules28104224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/12/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023] Open
Abstract
Cancer cells can evade immune surveillance through binding of its transmembrane receptor CD47 to CD172a on myeloid cells. CD47 is recognized as a promising immune checkpoint for cancer immunotherapy inhibiting macrophage phagocytosis. N-terminal post-translated modification (PTM) via glutaminyl cyclase is a landmark event in CD47 function maturation, but the molecular mechanism underlying the mechano-chemical regulation of the modification on CD47/CD172a remains unclear. Here, we performed so-called "ramp-clamp" steered molecular dynamics (SMD) simulations, and found that the N-terminal PTM enhanced interaction of CD172a with CD47 by inducing a dynamics-driven contraction of the binding pocket of the bound CD172a, an additional constraint on CYS15 on CD47 significantly improved the tensile strength of the complex with or without PTM, and a catch bond phenomenon would occur in complex dissociation under tensile force of 25 pN in a PTM-independent manner too. The residues GLN52 and SER66 on CD172a reinforced the H-bonding with their partners on CD47 in responding to PTM, while ARG69 on CD172 with its partner on CD47 might be crucial in the structural stability of the complex. This work might serve as molecular basis for the PTM-induced function improvement of CD47, should be helpful for deeply understanding CD47-relevant immune response and cancer development, and provides a novel insight in developing of new strategies of immunotherapy targeting this molecule interaction.
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Affiliation(s)
- Yang Zhao
- Institute of Biomechanics, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Liping Fang
- Institute of Biomechanics, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Pei Guo
- Institute of Biomechanics, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Ying Fang
- Institute of Biomechanics, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Jianhua Wu
- Institute of Biomechanics, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
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7
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Hao Y, Zhou X, Li Y, Li B, Cheng L. The CD47-SIRPα axis is a promising target for cancer immunotherapies. Int Immunopharmacol 2023; 120:110255. [PMID: 37187126 DOI: 10.1016/j.intimp.2023.110255] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/22/2023] [Accepted: 04/27/2023] [Indexed: 05/17/2023]
Abstract
Cluster of differentiation 47(CD47) is a transmembrane protein that is ubiquitously found on the surface of many cells in the body and uniquely overexpressed by both solid and hematologic malignant cells. CD47 interacts with signal-regulatory protein α (SIRPα), to trigger a "don't eat me" signal and thereby achieve cancer immune escape by inhibiting macrophage-mediated phagocytosis. Thus, blocking the CD47-SIRPα phagocytosis checkpoint, for release of the innate immune system, is a current research focus. Indeed, targeting the CD47-SIRPα axis as a cancer immunotherapy has shown promising efficacies in pre-clinical outcomes. Here, we first reviewed the origin, structure, and function of the CD47-SIRPα axis. Then, we reviewed its role as a target for cancer immunotherapies, as well as the factors regulating CD47-SIRPα axis-based immunotherapies. We specifically focused on the mechanism and progress of CD47-SIRPα axis-based immunotherapies and their combination with other treatment strategies. Finally, we discussed the challenges and directions for future research and identified potential CD47-SIRPα axis-based therapies that are suitable for clinical application.
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Affiliation(s)
- Yu Hao
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xinxuan Zhou
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Yiling Li
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Bolei Li
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Lei Cheng
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
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8
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Beckett AN, Chockley P, Pruett-Miller SM, Nguyen P, Vogel P, Sheppard H, Krenciute G, Gottschalk S, DeRenzo C. CD47 expression is critical for CAR T-cell survival in vivo. J Immunother Cancer 2023; 11:jitc-2022-005857. [PMID: 36918226 PMCID: PMC10016274 DOI: 10.1136/jitc-2022-005857] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2023] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND CD47 is an attractive immunotherapeutic target because it is highly expressed on multiple solid tumors. However, CD47 is also expressed on T cells. Limited studies have evaluated CD47-chimeric antigen receptor (CAR) T cells, and the role of CD47 in CAR T-cell function remains largely unknown. METHODS Here, we describe the development of CD47-CAR T cells derived from a high affinity signal regulatory protein α variant CV1, which binds CD47. CV1-CAR T cells were generated from human peripheral blood mononuclear cells and evaluated in vitro and in vivo. The role of CD47 in CAR T-cell function was examined by knocking out CD47 in T cells followed by downstream functional analyses. RESULTS While CV1-CAR T cells are specific and exhibit potent activity in vitro they lacked antitumor activity in xenograft models. Mechanistic studies revealed CV1-CAR T cells downregulate CD47 to overcome fratricide, but CD47 loss resulted in their failure to expand and persist in vivo. This effect was not limited to CV1-CAR T cells, since CD47 knockout CAR T cells targeting another solid tumor antigen exhibited the same in vivo fate. Further, CD47 knockout T cells were sensitive to macrophage-mediated phagocytosis. CONCLUSIONS These findings highlight that CD47 expression is critical for CAR T-cell survival in vivo and is a 'sine qua non' for successful adoptive T-cell therapy.
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Affiliation(s)
- Alex N Beckett
- Graduate School of Biomedical Sciences, St Jude Children's Research Hospital, Memphis, Tennessee, USA.,Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Peter Chockley
- Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Shondra M Pruett-Miller
- Center for Advanced Genome Engineering, St Jude Children's Research Hospital, Memphis, Tennessee, USA.,Department of Cell and Molecular Biology, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Phuong Nguyen
- Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Peter Vogel
- Department of Pathology, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Heather Sheppard
- Department of Pathology, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Giedre Krenciute
- Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Stephen Gottschalk
- Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Christopher DeRenzo
- Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, Tennessee, USA
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9
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Podolnikova NP, Key S, Wang X, Ugarova TP. THE CIS ASSOCIATION OF CD47 WITH INTEGRIN Mac-1 REGULATES MACROPHAGE RESPONSES BY STABILIZING THE EXTENDED INTEGRIN CONFORMATION. J Biol Chem 2023; 299:103024. [PMID: 36796515 PMCID: PMC10124913 DOI: 10.1016/j.jbc.2023.103024] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/17/2023] Open
Abstract
CD47 is a ubiquitously expressed cell surface integrin-associated protein. Recently, we have demonstrated that integrin Mac-1 (αMβ2, CD11b/CD18, CR3), the major adhesion receptor on the surface of myeloid cells, can be coprecipitated with CD47. However, the molecular basis for the CD47-Mac-1 interaction and its functional consequences remain unclear. Here, we demonstrated that CD47 regulates macrophage functions directly interacting with Mac-1. In particular, adhesion, spreading, migration, phagocytosis, and fusion of CD47-deficient macrophages were significantly decreased. We validated the functional link between CD47 and Mac-1 by co-immunoprecipitation analysis using various Mac-1-expressing cells. In HEK293 cells expressing individual αM and β2 integrin subunits, CD47 was found to bind both subunits. Interestingly, a higher amount of CD47 was recovered with the free β2 subunit than in the complex with the whole integrin. Furthermore, activating Mac-1-expressing HEK293 cells with PMA, Mn2+, and activating antibody MEM48 increased the amount of CD47 in complex with Mac-1, suggesting CD47 has a greater affinity for the extended integrin conformation. Notably, on the surface of cells lacking CD47, fewer Mac-1 molecules could convert into an extended conformation in response to activation. Additionally, we identified the binding site in CD47 for Mac-1 in its constituent IgV domain. The complementary binding sites for CD47 in Mac-1 were localized in integrin epidermal growth factor-like domains 3 and 4 of the β2 and calf-1 and calf-2 domains of the α subunits. These results indicate that Mac-1 forms a lateral complex with CD47, which regulates essential macrophage functions by stabilizing the extended integrin conformation.
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Affiliation(s)
| | - Shundene Key
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287
| | - Xu Wang
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287
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10
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Sanders E, Alcaide P. Red light-green light: T-cell trafficking in cardiac and vascular inflammation. Am J Physiol Cell Physiol 2023; 324:C58-C66. [PMID: 36409175 PMCID: PMC9762958 DOI: 10.1152/ajpcell.00421.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/31/2022] [Accepted: 11/14/2022] [Indexed: 11/23/2022]
Abstract
Extravasation of T cells from the bloodstream into inflamed tissues requires interactions between T cells and vascular endothelial cells, a necessary step that allows T cells to exert their effector function during the immune response to pathogens and to sterile insults. This cellular cross talk involves adhesion molecules on both the vascular endothelium and the T cells themselves that function as receptor-ligand pairs to slow down circulating T cells. These will eventually extravasate into sites of inflammation when they receive the correct chemokine signals. Accumulation of T cells within the vascular wall can lead to vessel thickening and vascular disease, whereas T-cell extravasation into the myocardium often leads to cardiac chronic inflammation and adverse cardiac remodeling, hallmarks of heart failure. On the flip side, T-cell trafficking is required for pathogen clearance and to promote tissue repair after injury resulting from cardiac ischemia. Thus, a better understanding of the central players mediating these interactions may help develop novel therapeutics to modulate vascular and cardiac inflammation. Here, we review the most recent literature on pathways that regulate T-cell transendothelial migration, the last step leading to T-cell infiltration into tissues and organs in the context of vascular and cardiac inflammation. We discuss new potential avenues to therapeutically modulate these pathways to enhance or prevent immune cell infiltration in cardiovascular disease.
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Affiliation(s)
- Erin Sanders
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts
- Cell, Molecular, and Developmental Biology Program, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts
| | - Pilar Alcaide
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts
- Cell, Molecular, and Developmental Biology Program, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts
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11
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Nath PR, Pal-Nath D, Kaur S, Gangaplara A, Meyer TJ, Cam MC, Roberts DD. Loss of CD47 alters CD8+ T cell activation in vitro and immunodynamics in mice. Oncoimmunology 2022; 11:2111909. [PMID: 36105746 PMCID: PMC9467551 DOI: 10.1080/2162402x.2022.2111909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
CD47 has established roles in the immune system for regulating macrophage phagocytosis and lymphocyte activation, with growing evidence of its cell-intrinsic regulatory roles in natural killer and CD8+ T cells. CD47 limits antigen-dependent cytotoxic activities of human and murine CD8+ T cells, but its role in T cell activation kinetics remains unclear. Using in vitro and in vivo models, we show here that CD47 differentially regulates CD8+ T cell responses to short- versus long-term activation. Although CD47 was not required for T cell development in mice and early activation in vitro, short-term stimuli elevated pathogen-reactive gene expression and enhanced proliferation and the effector phenotypes of Cd47-deficient relative to Cd47-sufficient CD8+ T cells. In contrast, persistent TCR stimulation limited the effector phenotypes of Cd47−/− CD8+ T cells and enhanced their apoptosis signature. CD8+ T cell expansion and activation in vivo induced by acute lymphocytic choriomeningitis virus (LCMV) infection did not differ in the absence of CD47. However, the frequency and effector phenotypes of Cd47−/− CD8+ T cells were constrained in chronic LCMV-infected as well as in mice bearing B16 melanoma tumors. Therefore, CD47 regulates CD8+ T cell activation, proliferation, and fitness in a context-dependent manner.
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Affiliation(s)
- Pulak R. Nath
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
- Clinical and Translational Immunology Unit, Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, MD, USA
| | - Dipasmita Pal-Nath
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Sukhbir Kaur
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Arunkumar Gangaplara
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Thomas J. Meyer
- CCR Collaborative Bioinformatics Resource, Office of Science and Technology Resources, National Cancer Institute, Bethesda, MD, USA
| | - Margaret C Cam
- CCR Collaborative Bioinformatics Resource, Office of Science and Technology Resources, National Cancer Institute, Bethesda, MD, USA
| | - David D. Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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12
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Kaur S, Livak F, Daaboul G, Anderson L, Roberts DD. Single vesicle analysis of CD47 association with integrins and tetraspanins on extracellular vesicles released by T lymphoblast and prostate carcinoma cells. J Extracell Vesicles 2022; 11:e12265. [PMID: 36107309 PMCID: PMC9477112 DOI: 10.1002/jev2.12265] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/25/2022] [Accepted: 08/29/2022] [Indexed: 11/08/2022] Open
Abstract
CD47 regulates the trafficking of specific coding and noncoding RNAs into extracellular vesicles (EVs), and the RNA contents of CD47+ EVs differ from that of CD63+ EVs released by the same cells. Single particle interferometric reflectance imaging sensing combined with immunofluorescent imaging was used to analyse the colocalization of tetraspanins, integrins, and CD47 on EVs produced by wild type and CD47-deficient Jurkat T lymphoblast and PC3 prostate carcinoma cell lines. On Jurkat cell-derived EVs, β1 and α4 integrin subunits colocalized predominantly with CD47 and CD81 but not with CD63 and CD9, conserving the known lateral interactions between these proteins in the plasma membrane. Although PC3 cell-derived EVs lacked detectable α4 integrin, specific association of CD81 with β1 and CD47 was preserved. Loss of CD47 expression in Jurkat cells significantly reduced β1 and α4 levels on EVs produced by these cells while elevating CD9+ , CD63+ , and CD81+ EVs. In contrast, loss of CD47 in PC3 cells decreased the abundance of CD63+ and CD81+ EVs. These data establish that CD47+ EVs are mostly distinct from EVs bearing the tetraspanins CD63 and CD9, but CD47 also indirectly regulates the abundance of EVs bearing these non-interacting tetraspanins via mechanisms that remain to be determined.
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Affiliation(s)
- Sukhbir Kaur
- Laboratory of PathologyCenter for Cancer Research, National Cancer InstituteNational Institutes of HealthBethesdaMarylandUSA
| | - Ferenc Livak
- Flow Cytometry Core, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer InstituteNational Institutes of HealthBethesdaMarylandUSA
| | | | | | - David D. Roberts
- Laboratory of PathologyCenter for Cancer Research, National Cancer InstituteNational Institutes of HealthBethesdaMarylandUSA
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13
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Heterotropic roles of divalent cations in the establishment of allostery and affinity maturation of integrin αXβ2. Cell Rep 2022; 40:111254. [PMID: 36001965 PMCID: PMC9440770 DOI: 10.1016/j.celrep.2022.111254] [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: 06/17/2021] [Revised: 05/23/2022] [Accepted: 08/02/2022] [Indexed: 11/21/2022] Open
Abstract
Allosteric activation and silencing of leukocyte β2-integrins transpire through cation-dependent structural changes, which mediate integrin biosynthesis and recycling, and are essential to designing leukocyte-specific drugs. Stepwise addition of Mg2+ reveals two mutually coupled events for the αXβ2 ligand-binding domain-the αX I-domain-corresponding to allostery establishment and affinity maturation. Electrostatic alterations in the Mg2+-binding site establish long-range couplings, leading to both pH- and Mg2+-occupancy-dependent biphasic stability change in the αX I-domain fold. The ligand-binding sensorgrams show composite affinity events for the αX I-domain accounting for the multiplicity of the αX I-domain conformational states existing in the solution. On cell surfaces, increasing Mg2+ concentration enhanced adhesiveness of αXβ2. This work highlights how intrinsically flexible pH- and cation-sensitive architecture endows a unique dynamic continuum to the αI-domain structure on the intact integrin, thereby revealing the importance of allostery establishment and affinity maturation in both extracellular and intracellular integrin events.
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14
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Zhao H, Song S, Ma J, Yan Z, Xie H, Feng Y, Che S. CD47 as a promising therapeutic target in oncology. Front Immunol 2022; 13:757480. [PMID: 36081498 PMCID: PMC9446754 DOI: 10.3389/fimmu.2022.757480] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 07/28/2022] [Indexed: 11/30/2022] Open
Abstract
CD47 is ubiquitously expressed on the surface of cells and plays a critical role in self-recognition. By interacting with SIRPα, TSP-1 and integrins, CD47 modulates cellular phagocytosis by macrophages, determines life span of individual erythrocytes, regulates activation of immune cells, and manipulates synaptic pruning during neuronal development. As such, CD47 has recently be regarded as one of novel innate checkpoint receptor targets for cancer immunotherapy. In this review, we will discuss increasing awareness about the diverse functions of CD47 and its role in immune system homeostasis. Then, we will discuss its potential therapeutic roles against cancer and outlines, the possible future research directions of CD47- based therapeutics against cancer.
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Affiliation(s)
- Hai Zhao
- Department of Neurosurgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shuangshuang Song
- Department of Nuclear Medicine, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Junwei Ma
- Department of Neurosurgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Zhiyong Yan
- Department of Neurosurgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Hongwei Xie
- Department of Neurosurgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ying Feng
- Department of Emergency, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shusheng Che
- Department of Neurosurgery, the Affiliated Hospital of Qingdao University, Qingdao, China
- *Correspondence: Shusheng Che,
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15
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Zhang Z, Luo H, Li C, Liang Z. Evidence for the circulating microRNA hsa-let-7d-3p as a potential new biomarker for sepsis in human subjects. Eur J Med Res 2022; 27:137. [PMID: 35907902 PMCID: PMC9338616 DOI: 10.1186/s40001-022-00763-3] [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: 04/22/2022] [Accepted: 07/18/2022] [Indexed: 12/11/2022] Open
Abstract
Background Current biomarkers for the early detection of sepsis have low sensitivity and specificity. Serum microRNAs (miRNAs) have been proposed as novel noninvasive biomarkers for various diseases. The aim of the present study was to discover a novel diagnostic biomarker for sepsis in human subjects. Methods miRNA expression profiling was performed using peripheral blood from three sepsis patients in the sepsis stage and improved condition stage using microarray screening. The differentially expressed miRNAs were primary validated by real-time quantitative polymerase chain reaction (RT-qPCR) in a further set of 20 sepsis patients in the sepsis stage and improved condition stage. Finally, we validated the differentially expressed miRNAs in 95 sepsis patients and 66 nonsepsis patients. The validated miRNAs and patients’ clinical indictors were analysed in a multivariate logistic regression model. The diagnostic value of the changed miRNA in sepsis was determined and compared with CRP and WBC by analysing the receiver operating characteristic (ROC) curves. Results According to the criteria, we detected 11 miRNAs regulated by the miRNA chip. RT-qPCR detection showed that the expression of hsa-let-7d-3p in sepsis patients was upregulated compared with that in nonsepsis patients. In a multiple logistic regression analysis, serum miRNA hsa-let-7d-3p was found to be an independent predictor of sepsis. Receiver operating characteristic curve (ROC) analysis showed that the area under the ROC curve of serum hsa-let-7d-3p was 0.696 [95% confidence interval (0.615, 0.778)]. Conclusion The miRNA hsa-let-7d-3p was identified as a novel biomarker for the early detection of sepsis. Supplementary Information The online version contains supplementary material available at 10.1186/s40001-022-00763-3.
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Affiliation(s)
- Zhaorui Zhang
- Department of Pulmonary and Critical Care Medicine, The Eighth Medical Center of Chinese, PLA General Hospital, No. 28 Fuxing Road, 100853, Beijing, China
| | - Hailun Luo
- Department of Respiration, LiangXiang Hospital, Fangshan, Beijing, China
| | - Chunsun Li
- Department of Pulmonary and Critical Care Medicine, The Eighth Medical Center of Chinese, PLA General Hospital, No. 28 Fuxing Road, 100853, Beijing, China
| | - Zhixin Liang
- Department of Pulmonary and Critical Care Medicine, The Eighth Medical Center of Chinese, PLA General Hospital, No. 28 Fuxing Road, 100853, Beijing, China.
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16
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Abstract
T-cell interaction with the endothelial cells lining the vessel wall is a necessary step in the inflammatory response that allows T cells to extravasate from the circulation and migrate to sites of infectious or sterile inflammation. On one hand, the vascular endothelium is activated and, as a result, switches from an anti-adhesive to a pro-adhesive state, allowing adhesion of T cells and other leukocytes. On the other hand, T cells express ligands of endothelial adhesion molecules to sustain these interactions that eventually result in T-cell extravasation into sites of inflammation. A better understanding of the central players mediating these interactions may help develop novel therapeutics that modulate this process by preventing T-cell migration and inflammation. Here, I summarize current knowledge on the nature of these interactions in the context of inflammation and cancer immunotherapy.
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17
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van Duijn A, Van der Burg SH, Scheeren FA. CD47/SIRPα axis: bridging innate and adaptive immunity. J Immunother Cancer 2022; 10:jitc-2022-004589. [PMID: 35831032 PMCID: PMC9280883 DOI: 10.1136/jitc-2022-004589] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2022] [Indexed: 11/29/2022] Open
Abstract
Myeloid immune cells are frequently present in the tumor environment, and although they can positively contribute to tumor control they often negatively impact anticancer immune responses. One way of inhibiting the positive contributions of myeloid cells is by signaling through the cluster of differentiation 47 (CD47)/signal regulatory protein alpha (SIRPα) axis. The SIRPα receptor is expressed on myeloid cells and is an inhibitory immune receptor that, upon binding to CD47 protein, delivers a ‘don’t eat me’ signal. As CD47 is often overexpressed on cancer cells, treatments targeting CD47/SIRPα have been under active investigation and are currently being tested in clinical settings. Interestingly, the CD47/SIRPα axis is also involved in T cell-mediated antitumor responses. In this perspective we provide an overview of recent studies showing how therapeutic blockade of the CD47/SIRPα axis improves the adaptive immune response. Furthermore, we discuss the interconnection between the myeloid CD47/SIRPα axis and adaptive T cell responses as well as the potential therapeutic role of the CD47/SIRPα axis in tumors with acquired resistance to the classic immunotherapy through major histocompatibility complex downregulation. Altogether this review provides a profound insight for the optimal exploitation of CD47/SIRPα immune checkpoint therapy.
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Affiliation(s)
- Anneloes van Duijn
- Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Sjoerd H Van der Burg
- Department of Medical Oncology, Oncode Institute, Leiden University Medical Center, Leiden, The Netherlands
| | - Ferenc A Scheeren
- Department of Dermatology, Leiden University Medical Center, Leiden, The Netherlands
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18
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Qu S, Jiao Z, Lu G, Xu J, Yao B, Wang T, Wang J, Yao Y, Yan X, Wang T, Liang H, Zen K. Human lung adenocarcinoma CD47 is upregulated by interferon-γ and promotes tumor metastasis. Mol Ther Oncolytics 2022; 25:276-287. [PMID: 35663227 PMCID: PMC9127120 DOI: 10.1016/j.omto.2022.04.011] [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: 09/13/2021] [Accepted: 04/29/2022] [Indexed: 02/07/2023] Open
Abstract
Tumor cells can evade attack by phagocytes by upregulating the self-marker CD47. The mechanisms underlying tumor CD47 upregulation, however, remain unclear. Here, we report that human lung adenocarcinoma CD47 is upregulated by interferon-γ (IFN-γ), the level in the tumor microenvironment of which is markedly increased after tumor metastasis and chemotherapy. The IFN-γ receptor is expressed in various human lung adenocarcinoma tissues regardless of the CD47 protein expression, and lung adenocarcinoma CD47 expression is significantly enhanced following tumor metastasis or chemotherapy treatment. In line with this, CD47 expression in various lung cancer cells is markedly increased by IFN-γ treatment. Mechanistically, IFN-γ promotes CD47 expression by activating interferon regulatory factor-1 (IRF-1), which binds to an IRF-1-binding domain within the CD47 promoter region and increases CD47 transcription. Functionally, IFN-γ-enhanced CD47 expression facilitates human lung cancer cell invasion both in vitro and in vivo, whereas IFN-γ-induced CD47 upregulation and cancer metastasis are blocked by mutating the IRF-1-binding site within the CD47 promoter. Our results reveal IFN-γ-enhanced CD47 expression as a novel mechanism promoting human lung adenocarcinoma progression.
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Affiliation(s)
- Shuang Qu
- Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Zichen Jiao
- Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China
| | - Geng Lu
- Department of Emergency Medicine, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210093, China
| | - Jiahan Xu
- Department of General Surgery, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210093, China
| | - Bing Yao
- Department of Medical Genetics, Nanjing Medical University, Nanjing, China
| | - Ting Wang
- Department of Pathology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210093, China
| | - Jun Wang
- Department of Emergency Medicine, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210093, China
| | - Yongzhong Yao
- Department of General Surgery, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210093, China
| | - Xin Yan
- Department of Respiratory Medicine, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210093, China
| | - Tao Wang
- Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China
- Corresponding author Tao Wang, Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China.
| | - Hongwei Liang
- Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
- Corresponding author Hongwei Liang, Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China.
| | - Ke Zen
- Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China
- Corresponding author Ke Zen, Department of Thoracic Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu 210093, China.
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19
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Mauersberger C, Hinterdobler J, Schunkert H, Kessler T, Sager HB. Where the Action Is-Leukocyte Recruitment in Atherosclerosis. Front Cardiovasc Med 2022; 8:813984. [PMID: 35087886 PMCID: PMC8787128 DOI: 10.3389/fcvm.2021.813984] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/15/2021] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis is the leading cause of death worldwide and leukocyte recruitment is a key element of this phenomenon, thus allowing immune cells to enter the arterial wall. There, in concert with accumulating lipids, the invading leukocytes trigger a plethora of inflammatory responses which promote the influx of additional leukocytes and lead to the continued growth of atherosclerotic plaques. The recruitment process follows a precise scheme of tethering, rolling, firm arrest, crawling and transmigration and involves multiple cellular and subcellular players. This review aims to provide a comprehensive up-to-date insight into the process of leukocyte recruitment relevant to atherosclerosis, each from the perspective of endothelial cells, monocytes and macrophages, neutrophils, T lymphocytes and platelets. In addition, therapeutic options targeting leukocyte recruitment into atherosclerotic lesions-or potentially arising from the growing body of insights into its precise mechanisms-are highlighted.
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Affiliation(s)
- Carina Mauersberger
- Department of Cardiology, German Heart Center Munich, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Julia Hinterdobler
- Department of Cardiology, German Heart Center Munich, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Heribert Schunkert
- Department of Cardiology, German Heart Center Munich, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Thorsten Kessler
- Department of Cardiology, German Heart Center Munich, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Hendrik B. Sager
- Department of Cardiology, German Heart Center Munich, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
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20
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SIRPα - CD47 axis regulates dendritic cell-T cell interactions and TCR activation during T cell priming in spleen. PLoS One 2022; 17:e0266566. [PMID: 35413056 PMCID: PMC9004769 DOI: 10.1371/journal.pone.0266566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/22/2022] [Indexed: 11/19/2022] Open
Abstract
The SIRPα-CD47 axis plays an important role in T cell recruitment to sites of immune reaction and inflammation but its role in T cell antigen priming is incompletely understood. Employing OTII TCR transgenic mice bred to Cd47-/- (Cd47KO) or SKI mice, a knock-in transgenic animal expressing non-signaling cytoplasmic-truncated SIRPα, we investigated how the SIRPα-CD47 axis contributes to antigen priming. Here we show that adoptive transfer of Cd47KO or SKI Ova-specific CD4+ T cells (OTII) into Cd47KO and SKI recipients, followed by Ova immunization, elicited reduced T cell division and proliferation indices, increased apoptosis, and reduced expansion compared to transfer into WT mice. We confirmed prior reports that splenic T cell zone, CD4+ conventional dendritic cells (cDCs) and CD4+ T cell numbers were reduced in Cd47KO and SKI mice. We report that in vitro derived DCs from Cd47KO and SKI mice exhibited impaired migration in vivo and exhibited reduced CD11c+ DC proximity to OTII T cells in T cell zones after Ag immunization, which correlates with reduced TCR activation in transferred OTII T cells. These findings suggest that reduced numbers of CD4+ cDCs and their impaired migration contributes to reduced T cell-DC proximity in splenic T cell zone and reduced T cell TCR activation, cell division and proliferation, and indirectly increased T cell apoptosis.
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21
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Wang H, Newton G, Wu L, Lin LL, Miracco AS, Natesan S, Luscinskas FW. CD47 antibody blockade suppresses microglia-dependent phagocytosis and monocyte transition to macrophages, impairing recovery in EAE. JCI Insight 2021; 6:148719. [PMID: 34591795 PMCID: PMC8663579 DOI: 10.1172/jci.insight.148719] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 09/24/2021] [Indexed: 11/24/2022] Open
Abstract
Experimental autoimmune encephalomyelitis (EAE) is a well-characterized animal model of multiple sclerosis. During the early phase of EAE, infiltrating monocytes and monocyte-derived macrophages contribute to T cell recruitment, especially CD4+ T cells, into the CNS, resulting in neuronal demyelination; however, in later stages, they promote remyelination and recovery by removal of myelin debris by phagocytosis. Signal regulatory protein α and CD47 are abundantly expressed in the CNS, and deletion of either molecule is protective in myelin oligodendrocyte glycoprotein–induced EAE because of failed effector T cell expansion and trafficking. Here we report that treatment with the function blocking CD47 Ab Miap410 substantially reduced the infiltration of pathogenic immune cells but impaired recovery from paresis. The underlying mechanism was by blocking the emergence of CD11chiMHCIIhi microglia at peak disease that expressed receptors for phagocytosis, scavenging, and lipid catabolism, which mediated clearance of myelin debris and the transition of monocytes to macrophages in the CNS. In the recovery phase of EAE, Miap410 Ab–treated mice had worsening paresis with sustained inflammation and limited remyelination as compared with control Ab–treated mice. In summary, Ab blockade of CD47 impaired resolution of CNS inflammation, thus worsening EAE.
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Affiliation(s)
- Huan Wang
- Center for Excellence in Vascular Biology, Department of Pathology, Mass General Brigham and Harvard Medical School, Boston, Massachusetts, USA
| | - Gail Newton
- Center for Excellence in Vascular Biology, Department of Pathology, Mass General Brigham and Harvard Medical School, Boston, Massachusetts, USA
| | - Liguo Wu
- Immunology & Inflammation Research Therapeutic Area, Sanofi US, Cambridge, Massachusetts, USA
| | - Lih-Ling Lin
- Immunology & Inflammation Research Therapeutic Area, Sanofi US, Cambridge, Massachusetts, USA
| | - Amy S Miracco
- Immunology & Inflammation Research Therapeutic Area, Sanofi US, Cambridge, Massachusetts, USA
| | - Sridaran Natesan
- Immunology & Inflammation Research Therapeutic Area, Sanofi US, Cambridge, Massachusetts, USA
| | - Francis W Luscinskas
- Center for Excellence in Vascular Biology, Department of Pathology, Mass General Brigham and Harvard Medical School, Boston, Massachusetts, USA
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22
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Anastasiou M, Newton GA, Kaur K, Carrillo-Salinas FJ, Smolgovsky SA, Bayer AL, Ilyukha V, Sharma S, Poltorak A, Luscinskas FW, Alcaide P. Endothelial STING controls T cell transmigration in an IFNI-dependent manner. JCI Insight 2021; 6:e149346. [PMID: 34156982 PMCID: PMC8410041 DOI: 10.1172/jci.insight.149346] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/17/2021] [Indexed: 12/15/2022] Open
Abstract
The stimulator of IFN genes (STING) protein senses cyclic dinucleotides released in response to double-stranded DNA and functions as an adaptor molecule for type I IFN (IFNI) signaling by activating IFNI-stimulated genes (ISG). We found impaired T cell infiltration into the peritoneum in response to TNF-α in global and EC-specific STING-/- mice and discovered that T cell transendothelial migration (TEM) across mouse and human endothelial cells (EC) deficient in STING was strikingly reduced compared with control EC, whereas T cell adhesion was not impaired. STING-/- T cells showed no defect in TEM or adhesion to EC, or immobilized endothelial cell-expressed molecules ICAM1 and VCAM1, compared with WT T cells. Mechanistically, CXCL10, an ISG and a chemoattractant for T cells, was dramatically reduced in TNF-α-stimulated STING-/- EC, and genetic loss or pharmacologic antagonisms of IFNI receptor (IFNAR) pathway reduced T cell TEM. Our data demonstrate a central role for EC-STING during T cell TEM that is dependent on the ISG CXCL10 and on IFNI/IFNAR signaling.
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Affiliation(s)
- Marina Anastasiou
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,Department of Internal Medicine, University of Crete Medical School, Crete, Greece
| | - Gail A. Newton
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Kuljeet Kaur
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA
| | | | - Sasha A. Smolgovsky
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,Tufts Graduate School for Biomedical Sciences Immunology Program, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Abraham L. Bayer
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,Tufts Graduate School for Biomedical Sciences Immunology Program, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Vladimir Ilyukha
- Petrozavodsk State University, Petrozavodsk, Republic of Karelia, Russia
| | - Shruti Sharma
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,Tufts Graduate School for Biomedical Sciences Immunology Program, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Alexander Poltorak
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,Tufts Graduate School for Biomedical Sciences Immunology Program, Tufts University School of Medicine, Boston, Massachusetts, USA.,Petrozavodsk State University, Petrozavodsk, Republic of Karelia, Russia
| | - Francis W. Luscinskas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Pilar Alcaide
- Department of Immunology, Tufts University School of Medicine, Boston, Massachusetts, USA.,Tufts Graduate School for Biomedical Sciences Immunology Program, Tufts University School of Medicine, Boston, Massachusetts, USA
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23
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Roberts DD, Isenberg JS. CD47 and thrombospondin-1 regulation of mitochondria, metabolism, and diabetes. Am J Physiol Cell Physiol 2021; 321:C201-C213. [PMID: 34106789 DOI: 10.1152/ajpcell.00175.2021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Thrombospondin-1 (TSP1) is the prototypical member of a family of secreted proteins that modulate cell behavior by engaging with molecules in the extracellular matrix and with receptors on the cell surface. CD47 is widely displayed on many, if not all, cell types and is a high-affinity TSP1 receptor. CD47 is a marker of self that limits innate immune cell activities, a feature recently exploited to enhance cancer immunotherapy. Another major role for CD47 in health and disease is to mediate TSP1 signaling. TSP1 acting through CD47 contributes to mitochondrial, metabolic, and endocrine dysfunction. Studies in animal models found that elevated TSP1 expression, acting in part through CD47, causes mitochondrial and metabolic dysfunction. Clinical studies established that abnormal TSP1 expression positively correlates with obesity, fatty liver disease, and diabetes. The unabated increase in these conditions worldwide and the availability of CD47 targeting drugs justify a closer look into how TSP1 and CD47 disrupt metabolic balance and the potential for therapeutic intervention.
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Affiliation(s)
- David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
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24
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Azcutia V, Kelm M, Luissint AC, Boerner K, Flemming S, Quiros M, Newton G, Nusrat A, Luscinskas FW, Parkos CA. Neutrophil expressed CD47 regulates CD11b/CD18-dependent neutrophil transepithelial migration in the intestine in vivo. Mucosal Immunol 2021; 14:331-341. [PMID: 32561828 PMCID: PMC7749029 DOI: 10.1038/s41385-020-0316-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/24/2020] [Accepted: 06/04/2020] [Indexed: 02/04/2023]
Abstract
Dysregulated neutrophil (PMN) transmigration across epithelial surfaces (TEpM) significantly contributes to chronic inflammatory diseases, yet mechanisms defining this process remain poorly understood. In the intestine, uncontrolled PMN TEpM is a hallmark of disease flares in ulcerative colitis. Previous in vitro studies directed at identifying molecular determinants that mediate TEpM have shown that plasma membrane proteins including CD47 and CD11b/CD18 play key roles in regulating PMN TEpM across monolayers of intestinal epithelial cells. Here, we show that CD47 modulates PMN TEpM in vivo using an ileal loop assay. Importantly, using novel tissue-specific CD47 knockout mice and in vitro approaches, we report that PMN-expressed, but not epithelial-expressed CD47 plays a major role in regulating PMN TEpM. We show that CD47 associates with CD11b/CD18 in the plasma membrane of PMN, and that loss of CD47 results in impaired CD11b/CD18 activation. In addition, in vitro and in vivo studies using function blocking antibodies support a role of CD47 in regulating CD11b-dependent PMN TEpM and chemotaxis. Taken together, these findings provide new insights for developing approaches to target dysregulated PMN infiltration in the intestine. Moreover, tissue-specific CD47 knockout mice constitute an important new tool to study contributions of cells expressing CD47 to inflammation in vivo.
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Affiliation(s)
- Veronica Azcutia
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.,Correspondence to:Veronica Azcutia, PhD. Department of Pathology, University of Michigan School of Medicine, 109 Zina Pitcher, BSRB Rm-4620. Ann Arbor, Michigan 48109, USA. Tel: (734) 936-1856 ; Charles A. Parkos, MD, PhD. Department of Pathology, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC 30-1537. Ann Arbor, Michigan 48109, USA. Tel: (734) 763-6384 Fax: (734) 763-4782
| | - Matthias Kelm
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Anny-Claude Luissint
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Kevin Boerner
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Sven Flemming
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Miguel Quiros
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Gail Newton
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USA.,Harvard Medical School, Boston, MA 02115, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Francis W. Luscinskas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women’s Hospital, Boston, MA 02115, USA.,Harvard Medical School, Boston, MA 02115, USA
| | - Charles A. Parkos
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.,Correspondence to:Veronica Azcutia, PhD. Department of Pathology, University of Michigan School of Medicine, 109 Zina Pitcher, BSRB Rm-4620. Ann Arbor, Michigan 48109, USA. Tel: (734) 936-1856 ; Charles A. Parkos, MD, PhD. Department of Pathology, University of Michigan School of Medicine, 2800 Plymouth Road, NCRC 30-1537. Ann Arbor, Michigan 48109, USA. Tel: (734) 763-6384 Fax: (734) 763-4782
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Cham LB, Adomati T, Li F, Ali M, Lang KS. CD47 as a Potential Target to Therapy for Infectious Diseases. Antibodies (Basel) 2020; 9:antib9030044. [PMID: 32882841 PMCID: PMC7551396 DOI: 10.3390/antib9030044] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/12/2020] [Accepted: 07/27/2020] [Indexed: 12/12/2022] Open
Abstract
The integrin associated protein (CD47) is a widely and moderately expressed glycoprotein in all healthy cells. Cancer cells are known to induce increased CD47 expression. Similar to cancer cells, all immune cells can upregulate their CD47 surface expression during infection. The CD47-SIRPa interaction induces an inhibitory effect on macrophages and dendritic cells (dendritic cells) while CD47-thrombospondin-signaling inhibits T cells. Therefore, the disruption of the CD47 interaction can mediate several biologic functions. Upon the blockade and knockout of CD47 reveals an immunosuppressive effect of CD47 during LCMV, influenza virus, HIV-1, mycobacterium tuberculosis, plasmodium and other bacterial pneumonia infections. In our recent study we shows that the blockade of CD47 using the anti-CD47 antibody increases the activation and effector function of macrophages, dendritic cells and T cells during viral infection. By enhancing both innate and adaptive immunity, CD47 blocking antibody promotes antiviral effect. Due to its broad mode of action, the immune-stimulatory effect derived from this antibody could be applicable in nonresolving and (re)emerging infections. The anti-CD47 antibody is currently under clinical trial for the treatment of cancer and could also have amenable therapeutic potential against infectious diseases. This review highlights the immunotherapeutic targeted role of CD47 in the infectious disease realm.
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Janssen E, Tohme M, Butts J, Giguere S, Sage PT, Velázquez FE, Kam C, Milin E, Das M, Sobh A, Al-Tamemi S, Luscinskas FW, Batista F, Geha RS. DOCK8 is essential for LFA-1-dependent positioning of T follicular helper cells in germinal centers. JCI Insight 2020; 5:134508. [PMID: 32573493 DOI: 10.1172/jci.insight.134508] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 06/18/2020] [Indexed: 01/07/2023] Open
Abstract
T follicular helper (Tfh) cell migration into germinal centers (GCs) is essential for the generation of GC B cells and antibody responses to T cell-dependent (TD) antigens. This process requires interactions between lymphocyte function-associated antigen 1 (LFA-1) on Tfh cells and ICAMs on B cells. The mechanisms underlying defective antibody responses to TD antigens in DOCK8 deficiency are incompletely understood. We show that mice selectively lacking DOCK8 in T cells had impaired IgG antibody responses to TD antigens, decreased GC size, and reduced numbers of GC B cells. However, they developed normal numbers of Tfh cells with intact capacity for driving B cell differentiation into a GC phenotype in vitro. Notably, migration of DOCK8-deficient T cells into GCs was defective. Following T cell receptor (TCR)/CD3 ligation, DOCK8-deficient T cells had impaired LFA-1 activation and reduced binding to ICAM-1. Our results therefore indicate that DOCK8 is important for LFA-1-dependent positioning of Tfh cells in GCs, and thereby the generation of GC B cells and IgG antibody responses to TD antigen.
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Affiliation(s)
- Erin Janssen
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Mira Tohme
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Jordan Butts
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Sophie Giguere
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard Medical School, Cambridge, Massachusetts, USA
| | - Peter T Sage
- Transplantation Research Center, Renal Division, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Francisco E Velázquez
- Center for Excellence in Vascular Biology, Brigham and Women's Hospital, Departments of Pathology and Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Christy Kam
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Elena Milin
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Mrinmoy Das
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Ali Sobh
- Department of Pediatrics, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | | | - Francis W Luscinskas
- Center for Excellence in Vascular Biology, Brigham and Women's Hospital, Departments of Pathology and Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Facundo Batista
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard Medical School, Cambridge, Massachusetts, USA
| | - Raif S Geha
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts, USA
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Cheng Q, Gu J, Adhikari BK, Sun L, Sun J. Is CD47 a potentially promising therapeutic target in cardiovascular diseases? - Role of CD47 in cardiovascular diseases. Life Sci 2020; 247:117426. [PMID: 32061866 DOI: 10.1016/j.lfs.2020.117426] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 02/03/2020] [Accepted: 02/09/2020] [Indexed: 01/03/2023]
Abstract
CD47 (cluster of differentiation 47) is a ubiquitously expressed transmembrane protein that belongs to the immunoglobulin superfamily. CD47 is both a receptor for the matricellular protein thrombospondin-1 (TSP-1) and a ligand for signal-regulatory protein alpha (SIRPα). Suppression of CD47 activity enhances angiogenesis and blood flow, restores phagocytosis by macrophages, improves ischemic tissue survival, attenuates ischemia reperfusion injury, and reverses atherosclerotic plaque formation. In conclusion, these observations suggest a pathogenic role of CD47 in the development of cardiovascular diseases (CVDs) and indicate that CD47 might be a potentially promising molecular target for treating CVDs. Herein, we highlight the role of CD47 in the CVD pathogenesis and discuss the potential clinical application by targeting CD47 for treating CVDs.
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Affiliation(s)
- Quanli Cheng
- The First Hospital and Center of Cardiovascular Diseases, Jilin University, Changchun, China
| | - Junlian Gu
- The School of Nursing, Shandong University, Jinan, China
| | - Binay Kumar Adhikari
- The First Hospital and Center of Cardiovascular Diseases, Jilin University, Changchun, China
| | - Liguang Sun
- The First Hospital and Institute of Immunology, Jilin University, Changchun, China.
| | - Jian Sun
- The First Hospital and Center of Cardiovascular Diseases, Jilin University, Changchun, China.
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Shao B, Yago T, Panicker SR, Zhang N, Liu Z, McEver RP. Th1 Cells Rolling on Selectins Trigger DAP12-Dependent Signals That Activate Integrin αLβ2. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2020; 204:37-48. [PMID: 31757864 PMCID: PMC6920551 DOI: 10.4049/jimmunol.1900680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 11/03/2019] [Indexed: 12/30/2022]
Abstract
During inflammation, both neutrophils and effector T cells use selectins to roll and integrins to arrest in postcapillary venules. In both cell types, chemokines can transduce signals that convert integrin αLβ2 to a high-affinity conformation, which interacts with ICAM-1 to mediate arrest. In neutrophils, selectins also trigger an immunoreceptor-like signaling cascade that converts integrin αLβ2 to an intermediate-affinity conformation, which interacts with ICAM-1 to slow rolling. It is not known whether selectins induce similar signaling events in T cells. Ag engagement causes phosphorylation of ITAMs on the TCR; these motifs recruit kinases and adaptors that lead to the activation of αLβ2. We found that mouse Th1 cells rolling on P- or E-selectin triggered signals that promoted αLβ2-dependent slow rolling on ICAM-1 in vitro and in vivo. The selectin signaling cascade resembled that used by the TCR, except that unexpectedly, Th1 cells employed the ITAM-bearing protein DAP12, which was not known to be expressed in these cells. Importantly, outside-in signaling through ligand-occupied αLβ2 also required DAP12. Cooperative selectin and chemokine signaling in Th1 cells promoted αLβ2-dependent slow rolling and arrest in vitro and in vivo and migration into Ag-challenged tissues in vivo. Our findings reveal an important function for DAP12 in Th1 cells and a new mechanism to recruit effector T cells to sites of inflammation.
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Affiliation(s)
- Bojing Shao
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104; and
| | - Tadayuki Yago
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104; and
| | - Sumith R Panicker
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104; and
| | - Nan Zhang
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
| | - Zhenghui Liu
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104; and
| | - Rodger P McEver
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104; and
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104
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29
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Epithelial CD47 is critical for mucosal repair in the murine intestine in vivo. Nat Commun 2019; 10:5004. [PMID: 31676794 PMCID: PMC6825175 DOI: 10.1038/s41467-019-12968-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 10/07/2019] [Indexed: 02/07/2023] Open
Abstract
CD47 is a ubiquitously expressed transmembrane glycoprotein that regulates inflammatory responses and tissue repair. Here, we show that normal mice treated with anti-CD47 antibodies, and Cd47-null mice have impaired intestinal mucosal wound healing. Furthermore, intestinal epithelial cell (IEC)-specific loss of CD47 does not induce spontaneous immune-mediated intestinal barrier disruption but results in defective mucosal repair after biopsy-induced colonic wounding or Dextran Sulfate Sodium (DSS)-induced mucosal damage. In vitro analyses using primary cultures of CD47-deficient murine colonic IEC or human colonoid-derived IEC treated with CD47-blocking antibodies demonstrate impaired epithelial cell migration in wound healing assays. Defective wound repair after CD47 loss is linked to decreased epithelial β1 integrin and focal adhesion signaling, as well as reduced thrombospondin-1 and TGF-β1. These results demonstrate a critical role for IEC-expressed CD47 in regulating mucosal repair and raise important considerations for possible alterations in wound healing secondary to therapeutic targeting of CD47. The role of the transmembrane glycoprotein CD47 in healing injured intestinal mucosa is unclear. Here, the authors show that selective loss of CD47 in the murine intestinal epithelium results in defective mucosal repair after colonic wounding, with suggested impaired cell migration in vitro.
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30
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Nath PR, Pal-Nath D, Mandal A, Cam MC, Schwartz AL, Roberts DD. Natural Killer Cell Recruitment and Activation Are Regulated by CD47 Expression in the Tumor Microenvironment. Cancer Immunol Res 2019; 7:1547-1561. [PMID: 31362997 DOI: 10.1158/2326-6066.cir-18-0367] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 03/29/2019] [Accepted: 07/26/2019] [Indexed: 12/19/2022]
Abstract
Elevated CD47 expression in some cancers is associated with decreased survival and limited clearance by phagocytes expressing the CD47 counterreceptor SIRPα. In contrast, elevated CD47 mRNA expression in human melanomas was associated with improved survival. Gene-expression data were analyzed to determine a potential mechanism for this apparent protective function and suggested that high CD47 expression increases recruitment of natural killer (NK) cells into the tumor microenvironment. The CD47 ligand thrombospondin-1 inhibited NK cell proliferation and CD69 expression in vitro Cd47 -/- NK cells correspondingly displayed augmented effector phenotypes, indicating an inhibitory function of CD47 on NK cells. Treating human NK cells with a CD47 antibody that blocks thrombospondin-1 binding abrogated its inhibitory effect on NK cell proliferation. Similarly, treating wild-type mice with a CD47 antibody that blocks thrombospondin-1 binding delayed B16 melanoma growth, associating with increased NK cell recruitment and increased granzyme B and interferon-γ levels in intratumoral NK but not CD8+ T cells. However, B16 melanomas grew faster in Cd47 -/- than in wild-type mice. Melanoma-bearing Cd47 -/- mice exhibited decreased splenic NK cell numbers, with impaired effector protein expression and elevated exhaustion markers. Proapoptotic gene expression in Cd47-/- NK cells was associated with stress-mediated increases in mitochondrial proton leak, reactive oxygen species, and apoptosis. Global gene-expression profiling in NK cells from tumor-bearing mice identified CD47-dependent transcriptional responses that regulate systemic NK activation and exhaustion. Therefore, CD47 positively and negatively regulates NK cell function, and therapeutic antibodies that block inhibitory CD47 signaling can enhance NK immune surveillance of melanomas.
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Affiliation(s)
- Pulak Ranjan Nath
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
| | - Dipasmita Pal-Nath
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Ajeet Mandal
- Human Brain Collection Core, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland
| | - Margaret C Cam
- CCR Collaborative Bioinformatics Resource, Office of Science and Technology Resources, National Cancer Institute, and Leidos Biomedical Research, Inc., National Institutes of Health, Bethesda, Maryland
| | - Anthony L Schwartz
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
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31
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Increased lymphocyte activation and atherosclerosis in CD47-deficient mice. Sci Rep 2019; 9:10608. [PMID: 31337788 PMCID: PMC6650435 DOI: 10.1038/s41598-019-46942-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 06/20/2019] [Indexed: 12/23/2022] Open
Abstract
CD47, also known as integrin-associated protein (IAP), is a transmembrane protein with multiple biological functions including regulation of efferocytosis and leukocyte trafficking. In this study we investigated the effect of CD47-deficiency on atherosclerosis using a model of adeno-associated virus (AAV)-induced hypercholesterolemia. We observed increased plaque formation in CD47 null mice compared to wild-type controls. Loss of CD47 caused activation of dendritic cells, T cells and natural killer (NK) cells, indicating an important role for CD47 in regulating immunity. In particular, Cd47 deficiency increased the proportion of IFN-γ producing CD90+ NK cells. Treatment with depleting anti-NK1.1 monoclonal antibody (mAb), but not depleting anti-CD4/CD8 mAbs, equalized atherosclerotic burden, suggesting NK cells were involved in the enhanced disease in Cd47 deficient mice. Additional studies revealed that levels of CD90+ and IFN-γ+ NK cells were expanded in atherosclerotic aorta and that CD90+ NK cells produce more IFN-γ than CD90- NK cells. Finally, we demonstrate that anti-CD47 (MIAP410) causes splenomegaly and activation of DCs and T cells, without affecting NK cell activation. In summary, we demonstrate that loss of CD47 causes increased lymphocyte activation that results in increased atherosclerosis.
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32
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Poldip2 deficiency protects against lung edema and vascular inflammation in a model of acute respiratory distress syndrome. Clin Sci (Lond) 2019; 133:321-334. [PMID: 30622219 DOI: 10.1042/cs20180944] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/19/2018] [Accepted: 01/07/2019] [Indexed: 01/13/2023]
Abstract
Acute respiratory distress syndrome (ARDS) in a deadly disease that can be brought on by endotoxins such as lipopolysaccharide (LPS). ARDS is characterized by vascular permeability, a severe inflammatory response, lung leukocyte infiltration, and resultant lung edema. Polymerase δ-interacting protein 2 (Poldip2) is a novel regulator of blood-brain barrier permeability; however, its role in regulating lung permeability and vascular inflammation is unknown. Here, the role of Poldip2 in regulating vascular permeability and inflammation in a mouse model of ARDS was assessed. Heterozygous deletion of Poldip2 was found to reduce LPS-induced mortality within 20 h, lung inflammatory signaling, and leukocyte infiltration. Moreover, reduced Poldip2-suppressed LP-induced vascular cell adhesion molecule (VCAM)-1 induction, leukocyte recruitment, and mitochondrial reactive oxygen species (ROS) production in vitro These data indicate that Poldip2 is an important regulator of the debilitating consequences of ARDS, potentially through the regulation of mitochondrial ROS-induced inflammatory signaling. Consequently, inhibition of Poldip2 may be a viable option for therapeutic discovery moving forward.
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33
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Song G, Yang L. Inhibited CD47 gene affects the clearance of acute myelogenous leukemia stem cells. J Cell Biochem 2018; 120:10303-10309. [PMID: 30565723 DOI: 10.1002/jcb.28314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 11/28/2018] [Indexed: 01/09/2023]
Abstract
OBJECTIVE To investigate the effect of targeted inhibition of CD47 gene expression on stem cell clearance in acute myeloid leukemia. METHODS After the lentiviral CD47-siRNA was transfected into acute myelogenous leukemia stem cells (LSCs), the proliferative status of acute myelogenous LSCs was detected by cell counting kit-8, and the apoptosis of stem cells of acute myeloid leukemia was detected by annexin/propidium iodide flow assays. The expression of Bcl-2, Bcl-xl, MCL-1, PIK3p110β, and interleukin (IL)-3 in acute myeloid LSCs was detected by Western blot analysis and the activity of protein phosphatase 2A (PP2A) and the protein content of CD96 and CD90 were measured by enzyme-linked immunosorbent assay kits. RESULTS After transfection of the lentivirus CD47-siRNA into acute myeloid LSCs, compared with the empty vector transfection group (control group), the cell viability of the CD47-siRNA transfection group was decreased, and the apoptosis rate was increased. Furthermore, the antiapoptotic protein Bcl-2, Bcl-xl, and MCL-1 and the content of IL-3 protein, CD96, and CD90 was decreased, whereas the activity of PIK3p110β and PP2A protein was increased. CONCLUSION Targeted inhibition of CD47 could inhibit the proliferation of myeloid LSCs, promote apoptosis, mobilize the cells into the cell cycle, and reduce the high expression of immune proteins on the cell surface, therefore providing a theoretical basis for the elimination and eradication of LSCs.
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Affiliation(s)
- Guangle Song
- Morphological Laboratory, Taishan Medical College, Taian, Shandong, China
| | - Leiying Yang
- Department of Pathology, Taishan Medical College, Taian, Shandong, China
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34
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Chang HY, Chang HM, Wu TJ, Chaing CY, Tzai TS, Cheng HL, Raghavaraju G, Chow NH, Liu HS. The role of Lutheran/basal cell adhesion molecule in human bladder carcinogenesis. J Biomed Sci 2017; 24:61. [PMID: 28841878 PMCID: PMC6389174 DOI: 10.1186/s12929-017-0360-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 08/03/2017] [Indexed: 11/25/2022] Open
Abstract
Background Lutheran/basal cell adhesion molecule (Lu/BCAM) is a membrane bound glycoprotein. This study was performed to investigate the role and downstream signaling pathway of Lu/BCAM in human bladder tumorigenesis. Methods Five human bladder cancer (E6, RT4, TSGH8301, TCCSUP and J82), one stable mouse fibroblast cell line (NIH-Lu) expressing Lu/BCAM transgene and sixty human uroepithelial carcinoma specimens were analyzed by real-time PCR, immunohistochemistry (IHC), immunofluorescence (IFA) staining, Western blotting and promoter luciferase assay for Lu/BCAM, respectively. The tumorigenicity of Lu/BCAM was demonstrated by focus formation, colony-forming ability, tumour formation, cell adhesion and migration. Results H-rasV12 was revealed to up-regulate Lu/BCAM at both transcriptional and translation levels. Lu/BCAM expression was detected on the membrane of primary human bladder cancer cells. Over-expression of Lu/BCAM in NIH-Lu stable cells increased focus number, colony formation and cell adhesion accompanied with F-actin rearrangement and decreased cell migration compared with parental NIH3T3 fibroblasts. In the presence of laminin ligand, Lu/BCAM overexpression further suppressed cell migration accompanied with increased cell adhesion. We further revealed that laminin-Lu/BCAM-induced cell adhesion and F-actin rearrangement were through increased Erk phosphorylation with an increase of RhoA and a decrease of Rac1 activity. Similarly, high Lu/BCAM expression was detected in the tumors of human renal pelvis, ureter and bladder, and was significantly associated with advanced tumor stage (p = 0.02). Patients with high Lu/BCAM expression showed a trend toward larger tumor size (p = 0.07) and lower disease-specific survival (p = 0.08), although not reaching statistical significance. Conclusion This is the first report showing that Lu/BCAM, in the presence of its ligand laminin, is oncogenic in human urothelial cancers and may have potential as a novel therapeutic target. Electronic supplementary material The online version of this article (doi:10.1186/s12929-017-0360-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hong-Yi Chang
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China.,Department of Urology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Hsin-Mei Chang
- Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Tsung-Jung Wu
- Department of Pathology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Chang-Yao Chaing
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Tzong-Shin Tzai
- Department of Urology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Hong-Lin Cheng
- Department of Urology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Giri Raghavaraju
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Nan-Haw Chow
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China. .,Department of Pathology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China.
| | - Hsiao-Sheng Liu
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China. .,Department of Microbiology and Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China. .,Center of Infectious Disease and Signaling Research, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China.
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35
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Vadillo E, Dorantes-Acosta E, Pelayo R, Schnoor M. T cell acute lymphoblastic leukemia (T-ALL): New insights into the cellular origins and infiltration mechanisms common and unique among hematologic malignancies. Blood Rev 2017; 32:36-51. [PMID: 28830639 DOI: 10.1016/j.blre.2017.08.006] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 08/08/2017] [Accepted: 08/12/2017] [Indexed: 02/06/2023]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) accounts for 15% and 25% of total childhood and adult ALL cases, respectively. During T-ALL, patients are at risk of organ infiltration by leukemic T-cells. Infiltration is a major consequence of disease relapse and correlates with poor prognosis. Transendothelial migration of leukemic cells is required to exit the blood stream into target organs. While mechanisms of normal T-cell transmigration are well known, the mechanisms of leukemic T-cell extravasation remain elusive; but involvement of chemokines, integrins and Notch signaling play critical roles. Here, we summarize current knowledge about molecular mechanisms of leukemic T-cell infiltration with special emphasis on the newly identified subtype early T-cell-progenitor (ETP)-ALL. Furthermore, we compare the extravasation potential of T-ALL cells with that of other hematologic malignancies such as B-ALL and acute myeloid leukemia (AML).
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Affiliation(s)
- Eduardo Vadillo
- Department for Molecular Biomedicine, Centre for Investigation and Advanced Studies of the National Polytechnic Institute (Cinvestav-IPN), 07360 Mexico City, Mexico.
| | - Elisa Dorantes-Acosta
- Leukemia Clinic, Children's Hospital of Mexico Federico Gómez, 06720 Mexico City, Mexico
| | - Rosana Pelayo
- Oncology Research Unit, National Medical Center, Mexican Institute for Social Security, 06720 Mexico City, Mexico
| | - Michael Schnoor
- Department for Molecular Biomedicine, Centre for Investigation and Advanced Studies of the National Polytechnic Institute (Cinvestav-IPN), 07360 Mexico City, Mexico.
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36
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Panezai J, Bergdahl E, Sundqvist KG. T-cell regulation through a basic suppressive mechanism targeting low-density lipoprotein receptor-related protein 1. Immunology 2017; 152:308-327. [PMID: 28580688 DOI: 10.1111/imm.12770] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/11/2017] [Accepted: 05/25/2017] [Indexed: 01/01/2023] Open
Abstract
Cell adhesion is generally considered to depend on positive regulation through ligation of integrins and cytokine receptors. However, here we show that T-cell adhesion, and notably also T-cell receptor (TCR) -induced activation, are subject to constant suppression through shedding of low-density lipoprotein receptor-related protein 1 (LRP1). The broad-spectrum metalloprotease inhibitor GM6001 abrogated shedding, so inducing prominent cell surface expression of LRP1 while enhancing TCR-induced activation and adhesion to β1 and β2 integrin ligands, hence arresting the cells. Integrin ligands also inhibited shedding but the effect was less potent than that of GM6001. Unlike GM6001, integrin ligands also induced cell surface expression of full-length thrombospondin-1 (TSP170) and TSP130, which associated with LRP1, and TSP110, which did not associate with LRP1. Cell surface expression of LRP1 and TSP130 were induced exclusively in adhering cells, expression of TSP110 preferentially in non-adhering cells and expression of TSP170 correlated with T-cell motility. The pro-adhesive chemokine CXCL12 also inhibited LRP1 shedding and induced surface expression of TSP170 and TSP130 while inhibiting TSP110. Exogenous TSP-1 and ligation of CD28 inhibited shedding although less effectively than GM6001, and the inhibition through CD28 was independent of TSP-1. Small interfering RNA silencing experiments confirmed involvement of LRP1 and TSP-1 in integrin-dependent adhesion and TCR-induced activation. Hence, the poor LRP1 expression in T cells depends on shedding. Integrin ligands and CXCL12 antagonize shedding through a TSP-1-dependent pathway and ligation of CD28 antagonizes shedding independent of TSP-1. The disappearance of LRP1 from the cell surface may provide basic immunosuppression at the T-cell level.
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Affiliation(s)
- Jeneen Panezai
- Division of Periodontology, Department of Dental Medicine, Karolinska Institute at Karolinska University Hospital, Stockholm, Sweden.,Department of Periodontology, Altamash Institute of Dental Medicine, Karachi, Pakistan
| | - Eva Bergdahl
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital, Stockholm, Sweden
| | - Karl-Gösta Sundqvist
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital, Stockholm, Sweden
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37
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Azcutia V, Bassil R, Herter JM, Engelbertsen D, Newton G, Autio A, Mayadas T, Lichtman AH, Khoury SJ, Parkos CA, Elyaman W, Luscinskas FW. Defects in CD4+ T cell LFA-1 integrin-dependent adhesion and proliferation protect Cd47-/- mice from EAE. J Leukoc Biol 2016; 101:493-505. [PMID: 27965383 DOI: 10.1189/jlb.3a1215-546rr] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 08/26/2016] [Accepted: 08/29/2016] [Indexed: 11/24/2022] Open
Abstract
CD47 is known to play an important role in CD4+ T cell homeostasis. We recently reported a reduction in mice deficient in the Cd47 gene (Cd47-/-) CD4+ T cell adhesion and transendothelial migration (TEM) in vivo and in vitro as a result of impaired expression of high-affinity forms of LFA-1 and VLA-4 integrins. A prior study concluded that Cd47-/- mice were resistant to experimental autoimmune encephalomyelitis (EAE) as a result of complete failure in CD4+ T cell activation after myelin oligodendrocyte glycoprotein peptide 35-55 aa (MOG35-55) immunization. As the prior EAE study was published before our report, authors could not have accounted for defects in T cell integrin function as a mechanism to protect Cd47-/- in EAE. Thus, we hypothesized that failure of T cell activation involved defects in LFA-1 and VLA-4 integrins. We confirmed that Cd47-/- mice were resistant to MOG35-55-induced EAE. Our data, however, supported a different mechanism that was not a result of failure of CD4+ T cell activation. Instead, we found that CD4+ T cells in MOG35-55-immunized Cd47-/- mice were activated, but clonal expansion contracted within 72 h after immunization. We used TCR crosslinking and mitogen activation in vitro to investigate the underlying mechanism. We found that naïve Cd47-/- CD4+ T cells exhibited a premature block in proliferation and survival because of impaired activation of LFA-1, despite effective TCR-induced activation. These results identify CD47 as an important regulator of LFA-1 and VLA-4 integrin-adhesive functions in T cell proliferation, as well as recruitment, and clarify the roles played by CD47 in MOG35-55-induced EAE.
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Affiliation(s)
- Veronica Azcutia
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Ribal Bassil
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Jan M Herter
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Daniel Engelbertsen
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Gail Newton
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Anu Autio
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Tanya Mayadas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Andrew H Lichtman
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Samia J Khoury
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Abou Haidar Neuroscience Institute, American University of Beirut, Lebanon; and
| | - Charles A Parkos
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Wassim Elyaman
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA;
| | - Francis W Luscinskas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA;
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38
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Janssen E, Tohme M, Hedayat M, Leick M, Kumari S, Ramesh N, Massaad MJ, Ullas S, Azcutia V, Goodnow CC, Randall KL, Qiao Q, Wu H, Al-Herz W, Cox D, Hartwig J, Irvine DJ, Luscinskas FW, Geha RS. A DOCK8-WIP-WASp complex links T cell receptors to the actin cytoskeleton. J Clin Invest 2016; 126:3837-3851. [PMID: 27599296 DOI: 10.1172/jci85774] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 07/28/2016] [Indexed: 11/17/2022] Open
Abstract
Wiskott-Aldrich syndrome (WAS) is associated with mutations in the WAS protein (WASp), which plays a critical role in the initiation of T cell receptor-driven (TCR-driven) actin polymerization. The clinical phenotype of WAS includes susceptibility to infection, allergy, autoimmunity, and malignancy and overlaps with the symptoms of dedicator of cytokinesis 8 (DOCK8) deficiency, suggesting that the 2 syndromes share common pathogenic mechanisms. Here, we demonstrated that the WASp-interacting protein (WIP) bridges DOCK8 to WASp and actin in T cells. We determined that the guanine nucleotide exchange factor activity of DOCK8 is essential for the integrity of the subcortical actin cytoskeleton as well as for TCR-driven WASp activation, F-actin assembly, immune synapse formation, actin foci formation, mechanotransduction, T cell transendothelial migration, and homing to lymph nodes, all of which also depend on WASp. These results indicate that DOCK8 and WASp are in the same signaling pathway that links TCRs to the actin cytoskeleton in TCR-driven actin assembly. Further, they provide an explanation for similarities in the clinical phenotypes of WAS and DOCK8 deficiency.
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Sullivan DP, Watson RL, Muller WA. 4D intravital microscopy uncovers critical strain differences for the roles of PECAM and CD99 in leukocyte diapedesis. Am J Physiol Heart Circ Physiol 2016; 311:H621-32. [PMID: 27422987 DOI: 10.1152/ajpheart.00289.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 07/05/2016] [Indexed: 01/13/2023]
Abstract
Leukocyte transendothelial migration (TEM) is an essential component of the inflammatory response. In vitro studies with human cells have demonstrated that platelet/endothelial cell adhesion molecule (PECAM) functions upstream of CD99 during TEM; however, results in vivo with mice have been apparently contradictory. In this study we use four-dimensional (4D) intravital microscopy to demonstrate that the site and order of function of PECAM and CD99 in vivo are dependent on the strain of mice. In FVB/n mice, PECAM functions upstream of CD99, as in human cells in vitro, and blocking antibodies against either molecule arrest neutrophils before they traverse the endothelium. However, in C57BL/6 mice, PECAM and CD99 appear to function at a different step, as the same antibodies arrest leukocyte migration through the endothelial basement membrane. These results are the first direct comparison of PECAM and CD99 function in different murine strains as well as the first demonstration of the sequential function of PECAM and CD99 in vivo.
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Affiliation(s)
- David P Sullivan
- Department of Pathology, Feinberg School of Medicine, Chicago, Illinois
| | - Richard L Watson
- Department of Pathology, Feinberg School of Medicine, Chicago, Illinois
| | - William A Muller
- Department of Pathology, Feinberg School of Medicine, Chicago, Illinois
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40
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Lee KJ, Lim D, Yoo YH, Park EJ, Lee SH, Yadav BK, Lee YK, Park JH, Kim D, Park KH, Hahn JH. Paired Ig-Like Type 2 Receptor-Derived Agonist Ligands Ameliorate Inflammatory Reactions by Downregulating β1 Integrin Activity. Mol Cells 2016; 39:557-65. [PMID: 27306643 PMCID: PMC4959021 DOI: 10.14348/molcells.2016.0079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/16/2016] [Accepted: 05/19/2016] [Indexed: 11/27/2022] Open
Abstract
The paired immunoglobulin-like type 2 receptor (PILR) family consists of two functionally opposite members, inhibitory PILRα and activating PILRβ receptors. PILRs are widely expressed in various immune cells and interact with their ligands, especially CD99 expressed on activated T cells, to participate in immune responses. Here we investigated whether PILR-derived agonists inhibit β1 integrin activity as ligands for CD99. PILR-derived peptides as well as PILR-Fc fusion proteins prevented cell adhesion to fibronectin through the regulation of β1 integrin activity. Especially, PILRpep3, a representative 3-mer peptide covering the conserved motifs of the PILR extracellular domain, prevented the clustering and activation of β1 integrin by dephosphorylating FAK and vinculin, which are major components of focal adhesion. In addition, PILRpep3 inhibited transendothelial migration of monocytes as well as endothelial cell tube formation. Furthermore, upon intraperitoneal injection of PILRpep3 into mice with collagen-induced arthritis, the inflammatory response of rheumatoid arthritis was strongly suppressed. Taken together, these results suggest that PILR-derived agonist ligands may prevent the inflammatory reactions of rheumatoid arthritis by activating CD99.
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Affiliation(s)
- Kyoung-Jin Lee
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Dongyoung Lim
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Yeon Ho Yoo
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Eun-Ji Park
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Sun-Hee Lee
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Birendra Kumar Yadav
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Yong-Ki Lee
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Jeong Hyun Park
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Daejoong Kim
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Kyeong Han Park
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
| | - Jang-Hee Hahn
- Department of Anatomy and Cell Biology, School of Medicine, Kangwon National University, Chuncheon 200-701,
Korea
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41
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Yu C, Zhang S, Wang Y, Zhang S, Luo L, Thorlacius H. Platelet-Derived CCL5 Regulates CXC Chemokine Formation and Neutrophil Recruitment in Acute Experimental Colitis. J Cell Physiol 2016; 231:370-6. [PMID: 26089223 DOI: 10.1002/jcp.25081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 06/15/2015] [Indexed: 01/30/2023]
Abstract
Accumulating data suggest that platelets not only regulate thrombosis and haemostasis but also inflammatory processes. Platelets contain numerous potent pro-inflammatory compounds, including the chemokines CCL5 and CXCL4, although their role in acute colitis remains elusive. The aim of this study is to examine the role of platelets and platelet-derived chemokines in acute colitis. Acute colitis is induced in female Balb/c mice by administration of 5% dextran sodium sulfate (DSS) for 5 days. Animals receive a platelet-depleting, anti-CCL5, anti-CXCL4, or a control antibody prior to DSS challenge. Colonic tissue is collected for quantification of myeloperoxidase (MPO) activity, CXCL5, CXCL2, interleukin-6 (IL-6), and CCL5 levels as well as morphological analyses. Platelet depletion reduce tissue damage and clinical disease activity index in DSS-exposed animals. Platelet depletion not only reduces levels of CXCL2 and CXCL5 but also levels of CCL5 in the inflamed colon. Immunoneutralization of CCL5 but not CXCL4 reduces tissue damage, CXC chemokine expression, and neutrophil recruitment in DSS-treated animals. These findings show that platelets play a key role in acute colitis by regulating CXC chemokine generation, neutrophil infiltration, and tissue damage in the colon. Moreover, our results suggest that platelet-derived CCL5 is an important link between platelet activation and neutrophil recruitment in acute colitis.
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Affiliation(s)
- Changhui Yu
- Department of Clinical Sciences Section of Surgery, Malmö Lund University, Malmö, Sweden.,Department of Gastroenterology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Songen Zhang
- Department of Clinical Sciences Section of Surgery, Malmö Lund University, Malmö, Sweden
| | - Yongzhi Wang
- Department of Clinical Sciences Section of Surgery, Malmö Lund University, Malmö, Sweden
| | - Su Zhang
- Department of Clinical Sciences Section of Surgery, Malmö Lund University, Malmö, Sweden
| | - Lingtao Luo
- Department of Clinical Sciences Section of Surgery, Malmö Lund University, Malmö, Sweden
| | - Henrik Thorlacius
- Department of Clinical Sciences Section of Surgery, Malmö Lund University, Malmö, Sweden
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42
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Lau J, Goh CC, Devi S, Keeble J, See P, Ginhoux F, Ng LG. Intravital multiphoton imaging of mouse tibialis anterior muscle. INTRAVITAL 2016; 5:e1156272. [PMID: 28243520 PMCID: PMC5226003 DOI: 10.1080/21659087.2016.1156272] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 02/11/2016] [Accepted: 02/15/2016] [Indexed: 01/03/2023]
Abstract
Intravital imaging by multiphoton microscopy is a powerful tool to gain invaluable insight into tissue biology and function. Here, we provide a step-by-step tissue preparation protocol for imaging the mouse tibialis anterior skeletal muscle. Additionally, we include steps for jugular vein catheterization that allow for well-controlled intravenous reagent delivery. Preparation of the tibialis anterior muscle is minimally invasive, reducing the chances of inducing damage and inflammation prior to imaging. The tibialis anterior muscle is useful for imaging leukocyte interaction with vascular endothelium, and to understand muscle contraction biology. Importantly, this model can be easily adapted to study neuromuscular diseases and myopathies.
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Affiliation(s)
- Jasmine Lau
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) , Biopolis, Singapore
| | - Chi Ching Goh
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) , Biopolis, Singapore
| | - Sapna Devi
- Department of Microbiology and Immunology, The Peter Doherty Institute, The University of Melbourne , Parkville, Victoria, Australia
| | - Jo Keeble
- Department of Medicine, University of Melbourne, Department of Rheumatology, Royal Melbourne Hospital, Inflammation Division, Walter and Eliza Hall Institute of Medical Research , Melbourne, Australia
| | - Peter See
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) , Biopolis, Singapore
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) , Biopolis, Singapore
| | - Lai Guan Ng
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (ASTAR) , Biopolis, Singapore
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43
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Cellular Barriers after Extravasation: Leukocyte Interactions with Polarized Epithelia in the Inflamed Tissue. Mediators Inflamm 2016; 2016:7650260. [PMID: 26941485 PMCID: PMC4749818 DOI: 10.1155/2016/7650260] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 01/05/2016] [Indexed: 12/11/2022] Open
Abstract
During the inflammatory response, immune cells egress from the circulation and follow a chemotactic and haptotactic gradient within the tissue, interacting with matrix components in the stroma and with parenchymal cells, which guide them towards the sites of inflammation. Polarized epithelial cells compartmentalize tissue cavities and are often exposed to inflammatory challenges such as toxics or infections in non-lymphoid tissues. Apicobasal polarity is critical to the specialized functions of these epithelia. Indeed, a common feature of epithelial dysfunction is the loss of polarity. Here we review evidence showing that apicobasal polarity regulates the inflammatory response: various polarized epithelia asymmetrically secrete chemotactic mediators and polarize adhesion receptors that dictate the route of leukocyte migration within the parenchyma. We also discuss recent findings showing that the loss of apicobasal polarity increases leukocyte adhesion to epithelial cells and the consequences that this could have for the inflammatory response towards damaged, infected or transformed epithelial cells.
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44
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Herter JM, Grabie N, Cullere X, Azcutia V, Rosetti F, Bennett P, Herter-Sprie GS, Elyaman W, Luscinskas FW, Lichtman AH, Mayadas TN. AKAP9 regulates activation-induced retention of T lymphocytes at sites of inflammation. Nat Commun 2015; 6:10182. [PMID: 26680259 PMCID: PMC4703868 DOI: 10.1038/ncomms10182] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 11/12/2015] [Indexed: 12/14/2022] Open
Abstract
The mechanisms driving T cell homing to lymph nodes and migration to tissue are well described but little is known about factors that affect T cell egress from tissues. Here, we generate mice with a T cell-specific deletion of the scaffold protein A kinase anchoring protein 9 (AKAP9) and use models of inflammatory disease to demonstrate that AKAP9 is dispensable for T cell priming and migration into tissues and lymph nodes, but is required for T cell retention in tissues. AKAP9 deficiency results in increased T cell egress to draining lymph nodes, which is associated with impaired T cell re-activation in tissues and protection from organ damage. AKAP9-deficient T cells exhibit reduced microtubule-dependent recycling of TCRs back to the cell surface and this affects antigen-dependent activation, primarily by non-classical antigen-presenting cells. Thus, AKAP9-dependent TCR trafficking drives efficient T cell re-activation and extends their retention at sites of inflammation with implications for disease pathogenesis. A-kinase anchoring protein 9 (AKAP9) is a scaffold protein that binds signalling proteins and regulates microtubules. Here the authors show that during inflammation AKAP9 in T cells is required for their reactivation and retention at the inflammation site and that its deletion protects from inflammation-induced organ damage.
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Affiliation(s)
- Jan M Herter
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Nir Grabie
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Xavier Cullere
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Veronica Azcutia
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Florencia Rosetti
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Paul Bennett
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Grit S Herter-Sprie
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, 450 Brookline Avenue, Boston, Massachusetts 02115, USA
| | - Wassim Elyaman
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Francis W Luscinskas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Andrew H Lichtman
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
| | - Tanya N Mayadas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA
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45
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Crossing the Vascular Wall: Common and Unique Mechanisms Exploited by Different Leukocyte Subsets during Extravasation. Mediators Inflamm 2015; 2015:946509. [PMID: 26568666 PMCID: PMC4629053 DOI: 10.1155/2015/946509] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 08/13/2015] [Indexed: 12/30/2022] Open
Abstract
Leukocyte extravasation is one of the essential and first steps during the initiation of inflammation. Therefore, a better understanding of the key molecules that regulate this process may help to develop novel therapeutics for treatment of inflammation-based diseases such as atherosclerosis or rheumatoid arthritis. The endothelial adhesion molecules ICAM-1 and VCAM-1 are known as the central mediators of leukocyte adhesion to and transmigration across the endothelium. Engagement of these molecules by their leukocyte integrin receptors initiates the activation of several signaling pathways within both leukocytes and endothelium. Several of such events have been described to occur during transendothelial migration of all leukocyte subsets, whereas other mechanisms are known only for a single leukocyte subset. Here, we summarize current knowledge on regulatory mechanisms of leukocyte extravasation from a leukocyte and endothelial point of view, respectively. Specifically, we will focus on highlighting common and unique mechanisms that specific leukocyte subsets exploit to succeed in crossing endothelial monolayers.
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46
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Bergström SE, Uzunel M, Talme T, Bergdahl E, Sundqvist KG. Antigen-induced regulation of T-cell motility, interaction with antigen-presenting cells and activation through endogenous thrombospondin-1 and its receptors. Immunology 2015; 144:687-703. [PMID: 25393517 DOI: 10.1111/imm.12424] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/24/2014] [Accepted: 10/30/2014] [Indexed: 12/18/2022] Open
Abstract
Antigen recognition reduces T-cell motility, and induces prolonged contact with antigen-presenting cells and activation through mechanisms that remain unclear. Here we show that the T-cell receptor (TCR) and CD28 regulate T-cell motility, contact with antigen-presenting cells and activation through endogenous thrombospondin-1 (TSP-1) and its receptors low-density lipoprotein receptor-related protein 1 (LRP1), calreticulin and CD47. Antigen stimulation induced a prominent up-regulation of TSP-1 expression, and transiently increased and subsequently decreased LRP1 expression whereas calreticulin was unaffected. This antigen-induced TSP-1/LRP1 response down-regulated a motogenic mechanism directed by LRP1-mediated processing of TSP-1 in cis within the same plasma membrane while promoting contact with antigen-presenting cells and activation through cis interaction of the C-terminal domain of TSP-1 with CD47 in response to N-terminal TSP-1 triggering by calreticulin. The antigen-induced TSP-1/LRP1 response maintained a reduced but significant motility level in activated cells. Blocking CD28 co-stimulation abrogated LRP1 and TSP-1 expression and motility. TCR/CD3 ligation alone enhanced TSP-1 expression whereas CD28 ligation alone enhanced LRP1 expression. Silencing of TSP-1 inhibited T-cell conjugation to antigen-presenting cells and T helper type 1 (Th1) and Th2 cytokine responses. The Th1 response enhanced motility and increased TSP-1 expression through interleukin-2, whereas the Th2 response weakened motility and reduced LRP1 expression through interleukin-4. Ligation of the TCR and CD28 therefore elicits a TSP-1/LRP1 response that stimulates prolonged contact with antigen-presenting cells and, although down-regulating motility, maintains a significant motility level to allow serial contacts and activation. Th1 and Th2 cytokine responses differentially regulate T-cell expression of TSP-1 and LRP1 and motility.
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Affiliation(s)
- Sten-Erik Bergström
- Department of Medicine, Karolinska Institute, Huddinge, Sweden; Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden; Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
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47
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Park SY, Yang JS, Schmider AB, Soberman RJ, Hsu VW. Coordinated regulation of bidirectional COPI transport at the Golgi by CDC42. Nature 2015; 521:529-32. [PMID: 25945738 PMCID: PMC4449304 DOI: 10.1038/nature14457] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 04/10/2015] [Indexed: 01/15/2023]
Abstract
The Golgi complex plays a central role in the intracellular sorting of secretory proteins 1,2. Anterograde transport through the Golgi has been explained by the movement of Golgi cisternae, known as cisternal maturation 3–5. Because this explanation is now appreciated to be incomplete 6, interest has developed in understanding tubules that connect the Golgi cisternae 7–9. Here, we find that the Coat Protein I (COPI) complex sorts anterograde cargoes into these tubules. Moreover, the small GTPase cdc42 regulates bidirectional Golgi transport by targeting the dual functions of COPI in cargo sorting and carrier formation. Cdc42 also directly imparts membrane curvature in promoting COPI tubule formation. Our findings further reveal that COPI tubular transport complements cisternal maturation in explaining how anterograde Golgi transport is achieved, and that bidirectional COPI transport is modulated by environmental cues through cdc42.
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Affiliation(s)
- Seung-Yeol Park
- 1] Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA [2] Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Jia-Shu Yang
- 1] Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA [2] Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Angela B Schmider
- 1] Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Nephrology Division and Department of Medicine, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
| | - Roy J Soberman
- 1] Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Nephrology Division and Department of Medicine, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA [3] Molecular Imaging Core, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
| | - Victor W Hsu
- 1] Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA [2] Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA
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48
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Wang G, van Driel BJ, Liao G, O’Keeffe MS, Halibozek PJ, Flipse J, Yigit B, Azcutia V, Luscinskas FW, Wang N, Terhorst C. Migration of myeloid cells during inflammation is differentially regulated by the cell surface receptors Slamf1 and Slamf8. PLoS One 2015; 10:e0121968. [PMID: 25799045 PMCID: PMC4370648 DOI: 10.1371/journal.pone.0121968] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 02/05/2015] [Indexed: 01/22/2023] Open
Abstract
Previous studies have demonstrated that the cell surface receptor Slamf1 (CD150) is requisite for optimal NADPH-oxidase (Nox2) dependent reactive oxygen species (ROS) production by phagocytes in response to Gram- bacteria. By contrast, Slamf8 (CD353) is a negative regulator of ROS in response to Gram+ and Gram- bacteria. Employing in vivo migration after skin sensitization, induction of peritonitis, and repopulation of the small intestine demonstrates that in vivo migration of Slamf1-/- dendritic cells and macrophages is reduced, as compared to wt mice. By contrast, in vivo migration of Slamf8-/- dendritic cells, macrophages and neutrophils is accelerated. These opposing effects of Slamf1 and Slamf8 are cell-intrinsic as judged by in vitro migration in transwell chambers in response to CCL19, CCL21 or CSF-1. Importantly, inhibiting ROS production of Slamf8-/- macrophages by diphenyleneiodonium chloride blocks this in vitro migration. We conclude that Slamf1 and Slamf8 govern ROS–dependent innate immune responses of myeloid cells, thus modulating migration of these cells during inflammation in an opposing manner.
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Affiliation(s)
- Guoxing Wang
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Boaz J. van Driel
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Gongxian Liao
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Michael S. O’Keeffe
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Peter J. Halibozek
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jacky Flipse
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Burcu Yigit
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Veronica Azcutia
- Department of Pathology, Center for Excellence in Vascular Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Francis W. Luscinskas
- Department of Pathology, Center for Excellence in Vascular Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Ninghai Wang
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Cox Terhorst
- Department of Medicine, Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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Soto-Pantoja DR, Kaur S, Roberts DD. CD47 signaling pathways controlling cellular differentiation and responses to stress. Crit Rev Biochem Mol Biol 2015; 50:212-30. [PMID: 25708195 DOI: 10.3109/10409238.2015.1014024] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CD47 is a widely expressed integral membrane protein that serves as the counter-receptor for the inhibitory phagocyte receptor signal-regulatory protein-α (SIRPα) and as a signaling receptor for the secreted matricellular protein thrombospondin-1. Recent studies employing mice and somatic cells lacking CD47 have revealed important pathophysiological functions of CD47 in cardiovascular homeostasis, immune regulation, resistance of cells and tissues to stress and chronic diseases of aging including cancer. With the emergence of experimental therapeutics targeting CD47, a more thorough understanding of CD47 signal transduction is essential. CD47 lacks a substantial cytoplasmic signaling domain, but several cytoplasmic binding partners have been identified, and lateral interactions of CD47 with other membrane receptors play important roles in mediating signaling resulting from the binding of thrombospondin-1. This review addresses recent advances in identifying the lateral binding partners, signal transduction pathways and downstream transcription networks regulated through CD47 in specific cell lineages. Major pathways regulated by CD47 signaling include calcium homeostasis, cyclic nucleotide signaling, nitric oxide and hydrogen sulfide biosynthesis and signaling and stem cell transcription factors. These pathways and other undefined proximal mediators of CD47 signaling regulate cell death and protective autophagy responses, mitochondrial biogenesis, cell adhesion and motility and stem cell self-renewal. Although thrombospondin-1 is the best characterized agonist of CD47, the potential roles of other members of the thrombospondin family, SIRPα and SIRPγ binding and homotypic CD47 interactions as agonists or antagonists of signaling through CD47 should also be considered.
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Affiliation(s)
- David R Soto-Pantoja
- a Laboratory of Pathology , Center for Cancer Research, National Cancer Institute, National Institutes of Health , Bethesda , MD , USA
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Abstract
PURPOSE OF REVIEW This review considers recent developments concerning the role of integrins in vascular biology with a specific emphasis on integrin activation, and the crosstalk between integrins and growth factor receptors. RECENT FINDINGS Recent studies have shown leukocytes can mediate direct transfer of molecules into endothelial cells, how specific integrins can be used to transduce signaling events, in particular in vascular beds, and how endothelial cell integrins can be targeted with specific ligands for the delivery of therapeutics. Kindlin and talin are both essential for integrin activation based on in-vivo studies of mice and humans in which the genes encoding for these proteins have been inactivated. Recent studies have attempted to translate these in-vivo realities into in-vitro models with mixed results. SUMMARY Mechanisms and consequences of integrin-ligand interactions on blood and vascular cells remain a major topic of hematological research. Crucial to the ligand binding function of integrins are two intracellular binding partners, talin and kindlin. In seeking to define the molecular basis for 'integrin activation', a mechanism must be envisioned in which both proteins talin and kindlin are required to produce a productive functional response, be it platelet aggregation or leukocyte extravasation. On endothelial cells, integrins and vascular endothelial growth factor receptor 2 influence the activation of one another by virtue of their direct physical interaction. It has been shown that this bidirectional communication is subject to regulation during angiogenesis.
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