1
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Nguyen H, Podolnikova NP, Ugarova TP, Wang X. α MI-domain of integrin Mac-1 binds the cytokine pleiotrophin using multiple mechanisms. Structure 2024:S0969-2126(24)00139-4. [PMID: 38729161 DOI: 10.1016/j.str.2024.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/21/2024] [Accepted: 04/15/2024] [Indexed: 05/12/2024]
Abstract
The integrin Mac-1 (αMβ2, CD11b/CD18, CR3) is an adhesion receptor expressed on macrophages and neutrophils. Mac-1 is also a promiscuous integrin that binds a diverse set of ligands through its αMI-domain. However, the binding mechanism of most ligands remains unclear. We have characterized the interaction of αMI-domain with the cytokine pleiotrophin (PTN), a protein known to bind αMI-domain and induce Mac-1-mediated cell adhesion and migration. Our data show that PTN's N-terminal domain binds a unique site near the N- and C-termini of the αMI-domain using a metal-independent mechanism. However, a stronger interaction is achieved when an acidic amino acid in a zwitterionic motif in PTN's C-terminal domain chelates the divalent cation in the metal ion-dependent adhesion site of active αMI-domain. These results indicate that αMI-domain can bind ligands using multiple mechanisms and that the active αMI-domain has a preference for motifs containing both positively and negatively charged amino acids.
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Affiliation(s)
- Hoa Nguyen
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85281, USA
| | | | - Tatiana P Ugarova
- School of Life Sciences, Arizona State University, Tempe, AZ 85281, USA
| | - Xu Wang
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85281, USA.
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2
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Wang K, Wu J, Yang Z, Zheng B, Shen S, Wang RR, Zhang Y, Wang HY, Chen L, Qiu X. Hyperactivation of β-catenin signal in hepatocellular carcinoma recruits myeloid-derived suppressor cells through PF4-CXCR3 axis. Cancer Lett 2024; 586:216690. [PMID: 38307410 DOI: 10.1016/j.canlet.2024.216690] [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: 12/02/2023] [Revised: 01/17/2024] [Accepted: 01/26/2024] [Indexed: 02/04/2024]
Abstract
The high mutation rate of CTNNB1 (37 %) and Wnt-β-catenin signal-associated genes (54 %) has been notified in hepatocellular carcinoma (HCC). The activation of Wnt-β-catenin signal pathway was reported to be associated with an immune "desert" phenotype, but the underlying mechanism remains unclear. Here we mainly employed orthotopic HCC models to explore on it. Mass cytometry depicted the immune contexture of orthotopic HCC syngeneic grafts, unveiling that the exogenous expression of β-catenin significantly increased the percentage of myeloid-derived suppressor cells (MDSCs) and decreased the percentage of CD8+ T-cells. Flow cytometry and immunohistochemistry further confirmed the findings. The protein microarray analysis, Western blot and PCR identified PF4 as its downstream regulating cytokine. Intratumorally injection of cytokine PF4 enhanced the accumulation of MDSCs. Knockout of PF4 abolished the effect of β-catenin on recruiting MDSCs. Chromatin immunoprecipitation and luciferase reporter assay demonstrated that β-catenin increases the mRNA level of PF4 via binding to PF4's promoter region. In vitro chemotaxis assay and in vivo administration of specific inhibitors identified CXCR3 on MDSCs as receptor for recruiting PF4. Lastly, the significant correlations across β-catenin, PF4 and MDSCs and CD8+ T-cells infiltration were verified in HCC clinical samples. Our results unveiled HCC tumor cell intrinsic hyperactivation of β-catenin can recruit MDSC through PF4-CXCR3, which contributes to the formation of immune "desert" phenotype. Our study provided new insights into the development of immunotherapeutic strategy of HCC with CTNNB1 mutation. SIGNIFICANCE: This study identifies PF4-CXCR3-MDSCs as a downstream mechanism underlying CTNNB1 mutation associated immune "desert" phenotype.
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Affiliation(s)
- Kaiting Wang
- School of Life Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, 200438, China
| | - Jianmin Wu
- Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, 200438, China
| | - Zhao Yang
- Eastern Hepatobiliary Surgery Hospital, Shanghai, 200438, China
| | - Bo Zheng
- The International Cooperation Laboratory on Signal Transduction, National Center for Liver Cancer, Eastern Hepatobiliary Surgery Hospital, Naval Medical University, Shanghai, 200438, China; National Center for Liver Cancer, Shanghai, 200441, China
| | - Siyun Shen
- The International Cooperation Laboratory on Signal Transduction, National Center for Liver Cancer, Eastern Hepatobiliary Surgery Hospital, Naval Medical University, Shanghai, 200438, China; National Center for Liver Cancer, Shanghai, 200441, China
| | - Rui-Ru Wang
- Berry Oncology Corporation, Digital Fujian Park, Fuzhou, China
| | - Yani Zhang
- Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, 200438, China
| | - Hong-Yang Wang
- The International Cooperation Laboratory on Signal Transduction, National Center for Liver Cancer, Eastern Hepatobiliary Surgery Hospital, Naval Medical University, Shanghai, 200438, China; National Center for Liver Cancer, Shanghai, 200441, China; Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer (SMMU), Ministry of Education, Shanghai, 200438, China; Shanghai Key Laboratory of Hepatobiliary Tumor Biology (EHBH), Shanghai, 200438, China.
| | - Lei Chen
- The International Cooperation Laboratory on Signal Transduction, National Center for Liver Cancer, Eastern Hepatobiliary Surgery Hospital, Naval Medical University, Shanghai, 200438, China; Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer (SMMU), Ministry of Education, Shanghai, 200438, China; Shanghai Key Laboratory of Hepatobiliary Tumor Biology (EHBH), Shanghai, 200438, China; Department of Cancer Institute, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| | - Xinyao Qiu
- Department of Cancer Institute, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
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3
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Liu Z, Li L, Zhang H, Pang X, Qiu Z, Xiang Q, Cui Y. Platelet factor 4(PF4) and its multiple roles in diseases. Blood Rev 2024; 64:101155. [PMID: 38008700 DOI: 10.1016/j.blre.2023.101155] [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: 07/30/2023] [Revised: 10/24/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Platelet factor 4 (PF4) combines with heparin to form an antigen that could produce IgG antibodies and participate in heparin-induced thrombocytopenia (HIT). PF4 has attracted wide attention due to its role in novel coronavirus vaccine-19 (COVID-9)-induced immune thrombotic thrombocytopenia (VITT) and cognitive impairments. The electrostatic interaction between PF4 and negatively charged molecules is vital in the progression of VITT, which is similar to HIT. Emerging evidence suggests its multiple roles in hematopoietic and angiogenic inhibition, platelet coagulation interference, host inflammatory response promotion, vascular inhibition, and antitumor properties. The emerging pharmacological effects of PF4 may help deepen the exploration of its mechanism, thus accelerating the development of targeted therapies. However, due to its pleiotropic properties, the development of drugs targeting PF4 is at an early stage and faces many challenges. Herein, we discussed the characteristics and biological functions of PF4, summarized PF4-mediated signaling pathways, and discussed its multiple roles in diseases to inform novel approaches for successful clinical translational research.
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Affiliation(s)
- Zhiyan Liu
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, China.
| | - Longtu Li
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China.
| | - Hanxu Zhang
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Xiaocong Pang
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, China
| | - Zhiwei Qiu
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, China
| | - Qian Xiang
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, China.
| | - Yimin Cui
- Department of Pharmacy, Peking University First Hospital, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, China.
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4
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Xiao Y, Vazquez-Padron RI, Martinez L, Singer HA, Woltmann D, Salman LH. Role of platelet factor 4 in arteriovenous fistula maturation failure: What do we know so far? J Vasc Access 2024; 25:390-406. [PMID: 35751379 PMCID: PMC9974241 DOI: 10.1177/11297298221085458] [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] [Indexed: 11/16/2022] Open
Abstract
The rate of arteriovenous fistula (AVF) maturation failure remains unacceptably high despite continuous efforts on technique improvement and careful pre-surgery planning. In fact, half of all newly created AVFs are unable to be used for hemodialysis (HD) without a salvage procedure. While vascular stenosis in the venous limb of the access is the culprit, the underlying factors leading to vascular narrowing and AVF maturation failure are yet to be determined. We have recently demonstrated that AVF non-maturation is associated with post-operative medial fibrosis and fibrotic stenosis, and post-operative intimal hyperplasia (IH) exacerbates the situation. Multiple pathological processes and signaling pathways are underlying the stenotic remodeling of the AVF. Our group has recently indicated that a pro-inflammatory cytokine platelet factor 4 (PF4/CXCL4) is upregulated in veins that fail to mature after AVF creation. Platelet factor 4 is a fibrosis marker and can be detected in vascular stenosis tissue, suggesting that it may contribute to AVF maturation failure through stimulation of fibrosis and development of fibrotic stenosis. Here, we present an overview of the how PF4-mediated fibrosis determines AVF maturation failure.
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Affiliation(s)
- Yuxuan Xiao
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Roberto I Vazquez-Padron
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Laisel Martinez
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Harold A Singer
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Daniel Woltmann
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Loay H Salman
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
- Division of Nephrology and Hypertension, Albany Medical College, Albany, NY, USA
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5
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Nguyen H, Podolnikova NP, Ugarova TP, Wang X. α MI-domain of Integrin Mac-1 Binds the Cytokine Pleiotrophin Using Multiple Mechanisms. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.01.578455. [PMID: 38352421 PMCID: PMC10862807 DOI: 10.1101/2024.02.01.578455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
The integrin Mac-1 (αMβ2, CD11b/CD18, CR3) is an important adhesion receptor expressed on macrophages and neutrophils. Mac-1 is also the most promiscuous member of the integrin family that binds a diverse set of ligands through its αMI-domain. However, the binding mechanism of most ligands is not clear. We have determined the interaction of αMI-domain with the cytokine pleiotrophin (PTN), a cationic protein known to bind αMI-domain and induce Mac-1-mediated cell adhesion and migration. Our data show that PTN's N-terminal domain binds a unique site near the N- and C-termini of the αMI-domain using a metal-independent mechanism. However, stronger interaction is achieved when an acidic amino acid in a zwitterionic motif in PTN's C-terminal domain chelates the divalent cation in the metal ion-dependent adhesion site of the active αMI-domain. These results indicate that αMI-domain can bind ligands using multiple mechanisms, and suggest that active αMI-domain prefers acidic amino acids in zwitterionic motifs.
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Affiliation(s)
- Hoa Nguyen
- School of Molecular Sciences, Arizona State University, Tempe, Arizona
| | | | | | - Xu Wang
- School of Molecular Sciences, Arizona State University, Tempe, Arizona
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6
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Li W, Zhang Q, Gu R, Zeng L, Liu H. Platelet factor 4 induces bone loss by inhibiting the integrin α5-FAK-ERK pathway. Animal Model Exp Med 2023; 6:573-584. [PMID: 37565509 PMCID: PMC10757219 DOI: 10.1002/ame2.12342] [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: 04/28/2023] [Accepted: 07/19/2023] [Indexed: 08/12/2023] Open
Abstract
BACKGROUND The effect of platelet factor 4 (PF4) on bone marrow mesenchymal stem cells (BMMSCs) and osteoporosis is poorly understood. Therefore, this study aimed to evaluate the effects of PF4-triggered bone destruction in mice and determine the underlying mechanism. METHODS First, in vitro cell proliferation and cell cycle of BMMSCs were assessed using a CCK8 assay and flow cytometry, respectively. Osteogenic differentiation was confirmed using staining and quantification of alkaline phosphatase and Alizarin Red S. Next, an osteoporotic mouse model was established by performing bilateral ovariectomy (OVX). Furthermore, the PF4 concentrations were obtained using enzyme-linked immunosorbent assay. The bone microarchitecture of the femur was evaluated using microCT and histological analyses. Finally, the key regulators of osteogenesis and pathways were investigated using quantitative real-time polymerase chain reaction and Western blotting. RESULTS Human PF4 widely and moderately decreased the cell proliferation and osteogenic differentiation ability of BMMSCs. Furthermore, the levels of PF4 in the serum and bone marrow were generally increased, whereas bone microarchitecture deteriorated due to OVX. Moreover, in vivo mouse PF4 supplementation triggered bone deterioration of the femur. In addition, several key regulators of osteogenesis were downregulated, and the integrin α5-focal adhesion kinase-extracellular signal-regulated kinase (ITGA5-FAK-ERK) pathway was inhibited due to PF4 supplementation. CONCLUSIONS PF4 may be attributed to OVX-induced bone loss triggered by the suppression of bone formation in vivo and alleviate BMMSC osteogenic differentiation by inhibiting the ITGA5-FAK-ERK pathway.
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Affiliation(s)
- Wei Li
- Department of Oral Pathology, Peking University School and Hospital of Stomatology, National Center for Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, National Health Commission Key Laboratory of Digital Technology of StomatologyPeking UniversityBeijingChina
- Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial RegionsChinese Academy of Medical SciencesBeijingChina
| | - Qiwei Zhang
- Department of Orthopedics, Beijing Hospital and National Center of Gerontology and Institute of Geriatrics MedicineChinese Academy of Medical SciencesBeijingChina
- Department of OrthopedicsBeijing Eden HospitalBeijingChina
| | - Ranli Gu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Center for Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, National Health Commission Key Laboratory of Digital Technology of StomatologyPeking UniversityBeijingChina
| | - Lijun Zeng
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Center for Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, National Health Commission Key Laboratory of Digital Technology of StomatologyPeking UniversityBeijingChina
| | - Hao Liu
- The Central Laboratory, Peking University School and Hospital of Stomatology, National Center for Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, National Health Commission Key Laboratory of Digital Technology of StomatologyPeking UniversityBeijingChina
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7
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Ngo ATP, Bochenek V, Gollomp K. The immunology of PF4 polyanion interactions. Curr Opin Hematol 2023; 30:219-229. [PMID: 37603711 DOI: 10.1097/moh.0000000000000782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
PURPOSE OF REVIEW Platelet factor 4 (PF4, CXCL4), the most abundant α-granule platelet-specific chemokine, forms tetramers with an equatorial ring of high positive charge that bind to a wide range of polyanions, after which it changes conformation to expose antigenic epitopes. Antibodies directed against PF4 not only help to clear infection but can also lead to the development of thrombotic disorders such as heparin-induced thrombocytopenia (HIT) and vaccine-induced thrombocytopenia and thrombosis (VITT). This review will outline the different mechanisms through which PF4 engagement with polyanions combats infection but also contributes to the pathogenesis of inflammatory and thrombotic disease states. RECENT FINDINGS Recent work has shown that PF4 binding to microbial polyanions may improve outcomes in infection by enhancing leukocyte-bacterial binding, tethering pathogens to neutrophil extracellular traps (NETs), decreasing the thrombotic potential of NET DNA, and modulating viral infectivity. However, PF4 binding to nucleic acids may enhance their recognition by innate immune receptors, leading to autoinflammation. Lastly, while HIT is induced by platelet activating antibodies that bind to PF4/polyanion complexes, VITT, which occurs in a small subset of patients treated with COVID-19 adenovirus vector vaccines, is characterized by prothrombotic antibodies that bind to PF4 alone. SUMMARY Investigating the complex interplay of PF4 and polyanions may provide insights relevant to the treatment of infectious disease while also improving our understanding of the pathogenesis of thrombotic disorders driven by anti-PF4/polyanion and anti-PF4 antibodies.
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Affiliation(s)
- Anh T P Ngo
- Division of Hematology, Children's Hospital of Philadelphia
| | | | - Kandace Gollomp
- Division of Hematology, Children's Hospital of Philadelphia
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
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8
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Podolnikova NP, Lishko VK, Roberson R, Koh Z, Derkach D, Richardson D, Sheller M, Ugarova TP. Platelet factor 4 improves survival in a murine model of antibiotic-susceptible and methicillin-resistant Staphylococcus aureus peritonitis. Front Cell Infect Microbiol 2023; 13:1217103. [PMID: 37868353 PMCID: PMC10585365 DOI: 10.3389/fcimb.2023.1217103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 09/13/2023] [Indexed: 10/24/2023] Open
Abstract
The complement receptor CR3, also known as integrin Mac-1 (CD11b/CD18), is one of the major phagocytic receptors on the surface of neutrophils and macrophages. We previously demonstrated that in its protein ligands, Mac-1 binds sequences enriched in basic and hydrophobic residues and strongly disfavors negatively charged sequences. The avoidance by Mac-1 of negatively charged surfaces suggests that the bacterial wall and bacterial capsule possessing net negative electrostatic charge may repel Mac-1 and that the cationic Mac-1 ligands can overcome this evasion by acting as opsonins. Indeed, we previously showed that opsonization of Gram-negative Escherichia coli with several cationic peptides, including PF4 (Platelet Factor 4), strongly augmented phagocytosis by macrophages. Here, we investigated the effect of recombinant PF4 (rPF4) on phagocytosis of Gram-positive Staphylococcus aureus in vitro and examined its impact in a mouse model of S. aureus peritonitis. Characterization of the interaction of rPF4 with nonencapsulated and encapsulated S. aureus showed that rPF4 localizes on the bacterial surface, thus making it available for Mac-1. Furthermore, rPF4 did not have direct bactericidal and bacteriostatic activity and was not toxic to host cells. rPF4 enhanced phagocytosis of S. aureus bioparticles by various primary and cultured Mac-1-expressing leukocytes by several folds. It also increased phagocytosis of live nonencapsulated and encapsulated bacteria. Notably, the augmentation of phagocytosis by rPF4 did not compromise the intracellular killing of S. aureus by macrophages. Using a murine S. aureus peritonitis model, we showed that treatment of infected mice with rPF4 caused a significant increase in the clearance of antibiotic-susceptible S. aureus and its methicillin-resistant (MRSA) variant and markedly improved survival. These findings indicate that rPF4 binding to the bacterial surface circumvents its antiphagocytic properties, improving host defense against antibiotic-susceptible and antibiotic-resistant bacteria.
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Affiliation(s)
| | - Valeryi K. Lishko
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Robert Roberson
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Zhiqian Koh
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | | | | | - Michael Sheller
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Tatiana P. Ugarova
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
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9
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Podolnikova NP, Lishko VK, Roberson R, Koh Z, Derkach D, Richardson D, Sheller M, Ugarova TP. PLATELET FACTOR 4 (PF4) IMPROVES SURVIVAL IN A MURINE MODEL OF ANTIBIOTIC-SUSCEPTIBLE AND METHICILLIN-RESISTANT STAPHYLOCOCCUS AUREUS PERITONITIS. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.25.554865. [PMID: 37662328 PMCID: PMC10473751 DOI: 10.1101/2023.08.25.554865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
The complement receptor CR3, also known as integrin Mac-1 (CD11b/CD18), is one of the major phagocytic receptors on the surface of neutrophils and macrophages. We previously demonstrated that in its protein ligands, Mac-1 binds sequences enriched in basic and hydrophobic residues and strongly disfavors negatively charged sequences. The avoidance by Mac-1 of negatively charged surfaces suggests that the bacterial wall and bacterial capsule possessing net negative electrostatic charge may repel Mac-1 and that the cationic Mac-1 ligands can overcome this evasion by acting as opsonins. Indeed, we previously showed that opsonization of Gram-negative Escherichia coli with several cationic peptides, including PF4 (Platelet Factor 4), strongly augmented phagocytosis by macrophages. Here, we investigated the effect of recombinant PF4 (rPF4) on phagocytosis of Gram-positive Staphylococcus aureus in vitro and examined its impact in a mouse model of S. aureus peritonitis. Characterization of the interaction of rPF4 with nonencapsulated and encapsulated S. aureus showed that rPF4 localizes on the bacterial surface, thus making it available for Mac-1. Furthermore, rPF4 did not have direct bactericidal and bacteriostatic activity and was not toxic to host cells. rPF4 enhanced phagocytosis of S. aureus bioparticles by various primary and cultured Mac-1-expressing leukocytes by several folds. It also increased phagocytosis of live nonencapsulated and encapsulated bacteria. Notably, the augmentation of phagocytosis by rPF4 did not compromise the intracellular killing of S. aureus by macrophages. Using a murine S. aureus peritonitis model, we showed that treatment of infected mice with rPF4 caused a significant increase in the clearance of antibiotic-susceptible S. aureus and its methicillin-resistant (MRSA) variant and markedly improved survival. These findings indicate that rPF4 binding to the bacterial surface circumvents its antiphagocytic properties, improving host defense against antibiotic-susceptible and antibiotic-resistant bacteria.
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Affiliation(s)
| | | | - Robert Roberson
- School of Life Sciences, Arizona State University, Tempe, AZ 85287
| | - Zhqian Koh
- School of Life Sciences, Arizona State University, Tempe, AZ 85287
| | | | | | - Michael Sheller
- School of Life Sciences, Arizona State University, Tempe, AZ 85287
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10
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Xiao Y, Martinez L, Zigmond Z, Woltmann D, Singer DV, Singer HA, Vazquez-Padron RI, Salman LH. Functions for platelet factor 4 (PF4/CXCL4) and its receptors in fibroblast-myofibroblast transition and fibrotic failure of arteriovenous fistulas (AVFs). J Vasc Access 2023:11297298231192386. [PMID: 37589266 PMCID: PMC10998683 DOI: 10.1177/11297298231192386] [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] [Indexed: 08/18/2023] Open
Abstract
BACKGROUND Over 60% of End Stage Renal Disease (ESRD) patients are relying on hemodialysis (HD) to survive, and the arteriovenous fistula (AVF) is the preferred vascular access method for HD. However approximately half of all newly created AVF fail to mature and cannot be used without a salvage procedure. We have recently demonstrated an association between AVF maturation failure and post-operative fibrosis, while our RNA-seq study also revealed that veins that ultimately failed during AVF maturation had elevated levels of platelet factor 4 (PF4/CXCL4). However, a link between these two findings was yet to be established. METHODS In this study, we investigated potential mechanisms between PF4 levels and fibrotic remodeling in veins. We compared the local expression of PF4 and fibrosis marker integrin β6 (ITGB6) in veins that successfully underwent maturation with that in veins that ultimately failed to mature. We also measured the changes of expression level of α-smooth muscle actin (αSMA/ACTA2) and collagen (Col1/COL1A1) in venous fibroblasts upon various treatments, such as PF4 pharmacological treatment, alteration of PF4 expression, and blocking of PF4 receptors. RESULTS We found that PF4 is expressed in veins and co-localizes with αSMA. In venous fibroblasts, PF4 stimulates expression of αSMA and Col1 via different pathways. The former requires integrins αvβ5 and α5β1, while chemokine receptor CXCR3 is needed for the latter. Interestingly, we also discovered that the expression of PF4 is associated with that of ITGB6, the β subunit of integrin αvβ6. This integrin is critical for the activation of the major fibrosis factor TGFβ, and overexpression of PF4 promotes activation of the TGFβ pathway. CONCLUSIONS These results indicate that upregulation of PF4 may cause venous fibrosis both directly by stimulating fibroblast differentiation and expression of extracellular matrix (ECM) molecules and indirectly by facilitating the activation of the TGFβ pathway.
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Affiliation(s)
- Yuxuan Xiao
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Laisel Martinez
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Zachary Zigmond
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Daniel Woltmann
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Diane V Singer
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Harold A Singer
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Roberto I Vazquez-Padron
- DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Loay H Salman
- Department of Molecular & Cellular Physiology, Albany Medical College, Albany, NY, USA
- Division of Nephrology & Hypertension, Albany Medical College, Albany, NY, USA
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11
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Hirsch J, Uzun G, Zlamal J, Singh A, Bakchoul T. Platelet-neutrophil interaction in COVID-19 and vaccine-induced thrombotic thrombocytopenia. Front Immunol 2023; 14:1186000. [PMID: 37275917 PMCID: PMC10237318 DOI: 10.3389/fimmu.2023.1186000] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 05/04/2023] [Indexed: 06/07/2023] Open
Abstract
Coronavirus disease 2019 (COVID-19) is known to commonly induce a thrombotic diathesis, particularly in severely affected individuals. So far, this COVID-19-associated coagulopathy (CAC) has been partially explained by hyperactivated platelets as well as by the prothrombotic effects of neutrophil extracellular traps (NETs) released from neutrophils. However, precise insight into the bidirectional relationship between platelets and neutrophils in the pathophysiology of CAC still lags behind. Vaccine-induced thrombotic thrombocytopenia (VITT) is a rare autoimmune disorder caused by auto-antibody formation in response to immunization with adenoviral vector vaccines. VITT is associated with life-threatening thromboembolic events and thus, high fatality rates. Our concept of the thrombophilia observed in VITT is relatively new, hence a better understanding could help in the management of such patients with the potential to also prevent VITT. In this review we aim to summarize the current knowledge on platelet-neutrophil interplay in COVID-19 and VITT.
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Affiliation(s)
- Johannes Hirsch
- Institute of Clinical and Experimental Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
- Center for Clinical Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
| | - Günalp Uzun
- Institute of Clinical and Experimental Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
- Center for Clinical Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
| | - Jan Zlamal
- Institute of Clinical and Experimental Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
- Center for Clinical Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
| | - Anurag Singh
- Institute of Clinical and Experimental Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
| | - Tamam Bakchoul
- Institute of Clinical and Experimental Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
- Center for Clinical Transfusion Medicine, University Hospital of Tuebingen, Tuebingen, Germany
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12
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Interactions between Platelets and Tumor Microenvironment Components in Ovarian Cancer and Their Implications for Treatment and Clinical Outcomes. Cancers (Basel) 2023; 15:cancers15041282. [PMID: 36831623 PMCID: PMC9953912 DOI: 10.3390/cancers15041282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/07/2023] [Accepted: 02/13/2023] [Indexed: 02/19/2023] Open
Abstract
Platelets, the primary operatives of hemostasis that contribute to blood coagulation and wound healing after blood vessel injury, are also involved in pathological conditions, including cancer. Malignancy-associated thrombosis is common in ovarian cancer patients and is associated with poor clinical outcomes. Platelets extravasate into the tumor microenvironment in ovarian cancer and interact with cancer cells and non-cancerous elements. Ovarian cancer cells also activate platelets. The communication between activated platelets, cancer cells, and the tumor microenvironment is via various platelet membrane proteins or mediators released through degranulation or the secretion of microvesicles from platelets. These interactions trigger signaling cascades in tumors that promote ovarian cancer progression, metastasis, and neoangiogenesis. This review discusses how interactions between platelets, cancer cells, cancer stem cells, stromal cells, and the extracellular matrix in the tumor microenvironment influence ovarian cancer progression. It also presents novel potential therapeutic approaches toward this gynecological cancer.
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13
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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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14
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Schrottmaier WC, Kral-Pointner JB, Salzmann M, Mussbacher M, Schmuckenschlager A, Pirabe A, Brunnthaler L, Kuttke M, Maier B, Heber S, Datler H, Ekici Y, Niederreiter B, Heber U, Blomgren B, Gorki AD, Söderberg-Nauclér C, Payrastre B, Gratacap MP, Knapp S, Schabbauer G, Assinger A. Platelet p110β mediates platelet-leukocyte interaction and curtails bacterial dissemination in pneumococcal pneumonia. Cell Rep 2022; 41:111614. [PMID: 36351402 DOI: 10.1016/j.celrep.2022.111614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/15/2022] [Accepted: 10/14/2022] [Indexed: 11/09/2022] Open
Abstract
Phosphatidylinositol 3-kinase catalytic subunit p110β is involved in tumorigenesis and hemostasis. However, it remains unclear if p110β also regulates platelet-mediated immune responses, which could have important consequences for immune modulation during anti-cancer treatment with p110β inhibitors. Thus, we investigate how platelet p110β affects inflammation and infection. Using a mouse model of Streptococcus pneumoniae-induced pneumonia, we find that both platelet-specific p110β deficiency and pharmacologic inhibition of p110β with TGX-221 exacerbate disease pathogenesis by preventing platelet-monocyte and neutrophil interactions, diminishing their infiltration and enhancing bacterial dissemination. Platelet p110β mediates neutrophil phagocytosis of S. pneumoniae in vitro and curtails bacteremia in vivo. Genetic deficiency or inhibition of platelet p110β also impairs macrophage recruitment in an independent model of sterile peritonitis. Our results demonstrate that platelet p110β dysfunction exacerbates pulmonary infection by impeding leukocyte functions. Thereby, our findings provide important insights into the immunomodulatory potential of PI3K inhibitors in bacterial infection.
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Affiliation(s)
- Waltraud Cornelia Schrottmaier
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Julia Barbara Kral-Pointner
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Manuel Salzmann
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Marion Mussbacher
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria; Department of Pharmacology and Toxicology, Institute of Pharmaceutical Sciences, University of Graz, 8010 Graz, Austria
| | - Anna Schmuckenschlager
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Anita Pirabe
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Laura Brunnthaler
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Mario Kuttke
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Barbara Maier
- Department of Medicine I, Research Division of Infection Biology, Medical University Vienna, 1090 Vienna, Austria
| | - Stefan Heber
- Institute of Physiology, Centre for Physiology and Pharmacology, Medical University of Vienna, 1090 Vienna, Austria
| | - Hannes Datler
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Yasemin Ekici
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria
| | - Birgit Niederreiter
- Division of Rheumatology, Internal Medicine III, Medical University of Vienna, 1090 Vienna, Austria
| | - Ulrike Heber
- Department of Pathology and Comprehensive Cancer Centre, Medical University of Vienna, 1090 Vienna, Austria
| | - Bo Blomgren
- Department of Clinical Sciences, Danderyd Hospital, Department of Oncology-Pathology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Anna-Dorothea Gorki
- Department of Medicine I, Research Division of Infection Biology, Medical University Vienna, 1090 Vienna, Austria
| | - Cecilia Söderberg-Nauclér
- Department of Medicine, Solna, Centre for Molecular Medicine, Microbial Pathogenesis Unit, Karolinska University Hospital, Karolinska Institutet, 17177 Stockholm, Sweden
| | - Bernard Payrastre
- INSERM UMR1297, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 31024 Toulouse, France
| | - Marie-Pierre Gratacap
- INSERM UMR1297, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Université Toulouse III Paul Sabatier, 31024 Toulouse, France
| | - Sylvia Knapp
- Department of Medicine I, Research Division of Infection Biology, Medical University Vienna, 1090 Vienna, Austria
| | - Gernot Schabbauer
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria.
| | - Alice Assinger
- Department of Vascular Biology and Thrombosis Research, Centre for Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstraße 17, 1090 Vienna, Austria.
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15
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YANG QQ, FANG MS, TU J, MA QX, SHEN LY, XU YY, CHEN J, CHEN ML. Guanxinning tablet inhibits the interaction between leukocyte integrin Mac-1 and platelet GPIbα for antithrombosis without increased bleeding risk. Chin J Nat Med 2022; 20:589-600. [DOI: 10.1016/s1875-5364(22)60183-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Indexed: 11/03/2022]
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16
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Mandel J, Casari M, Stepanyan M, Martyanov A, Deppermann C. Beyond Hemostasis: Platelet Innate Immune Interactions and Thromboinflammation. Int J Mol Sci 2022; 23:ijms23073868. [PMID: 35409226 PMCID: PMC8998935 DOI: 10.3390/ijms23073868] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 02/07/2023] Open
Abstract
There is accumulating evidence that platelets play roles beyond their traditional functions in thrombosis and hemostasis, e.g., in inflammatory processes, infection and cancer, and that they interact, stimulate and regulate cells of the innate immune system such as neutrophils, monocytes and macrophages. In this review, we will focus on platelet activation in hemostatic and inflammatory processes, as well as platelet interactions with neutrophils and monocytes/macrophages. We take a closer look at the contributions of major platelet receptors GPIb, αIIbβ3, TLT-1, CLEC-2 and Toll-like receptors (TLRs) as well as secretions from platelet granules on platelet-neutrophil aggregate and neutrophil extracellular trap (NET) formation in atherosclerosis, transfusion-related acute lung injury (TRALI) and COVID-19. Further, we will address platelet-monocyte and macrophage interactions during cancer metastasis, infection, sepsis and platelet clearance.
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Affiliation(s)
- Jonathan Mandel
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University, 55131 Mainz, Germany; (J.M.); (M.C.); (M.S.)
| | - Martina Casari
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University, 55131 Mainz, Germany; (J.M.); (M.C.); (M.S.)
| | - Maria Stepanyan
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University, 55131 Mainz, Germany; (J.M.); (M.C.); (M.S.)
- Center For Theoretical Problems of Physico-Chemical Pharmacology, 109029 Moscow, Russia;
- Physics Faculty, Lomonosov Moscow State University, 119991 Moscow, Russia
- Dmitriy Rogachev National Medical Research Center of Pediatric Hematology, Oncology Immunology Ministry of Healthcare of Russian Federation, 117198 Moscow, Russia
| | - Alexey Martyanov
- Center For Theoretical Problems of Physico-Chemical Pharmacology, 109029 Moscow, Russia;
- Dmitriy Rogachev National Medical Research Center of Pediatric Hematology, Oncology Immunology Ministry of Healthcare of Russian Federation, 117198 Moscow, Russia
- N.M. Emanuel Institute of Biochemical Physics RAS (IBCP RAS), 119334 Moscow, Russia
| | - Carsten Deppermann
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University, 55131 Mainz, Germany; (J.M.); (M.C.); (M.S.)
- Correspondence:
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17
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Meyers S, Crescente M, Verhamme P, Martinod K. Staphylococcus aureus and Neutrophil Extracellular Traps: The Master Manipulator Meets Its Match in Immunothrombosis. Arterioscler Thromb Vasc Biol 2022; 42:261-276. [PMID: 35109674 PMCID: PMC8860219 DOI: 10.1161/atvbaha.121.316930] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Over the past 10 years, neutrophil extracellular traps (NETs) have become widely accepted as an integral player in immunothrombosis, due to their complex interplay with both pathogens and components of the coagulation system. While the release of NETs is an attempt by neutrophils to trap pathogens and constrain infections, NETs can have bystander effects on the host by inducing uncontrolled thrombosis, inflammation, and tissue damage. From an evolutionary perspective, pathogens have adapted to bypass the host innate immune response. Staphylococcus aureus (S. aureus), in particular, proficiently overcomes NET formation using several virulence factors. Here we review mechanisms of NET formation and how these are intertwined with platelet activation, the release of endothelial von Willebrand factor, and the activation of the coagulation system. We discuss the unique ability of S. aureus to modulate NET formation and alter released NETs, which helps S. aureus to escape from the host's defense mechanisms. We then discuss how platelets and the coagulation system could play a role in NET formation in S. aureus-induced infective endocarditis, and we explain how targeting these complex cellular interactions could reveal novel therapies to treat this disease and other immunothrombotic disorders.
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Affiliation(s)
- Severien Meyers
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, KU Leuven, Belgium (S.M., M.C., P.V., K.M.)
| | - Marilena Crescente
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, KU Leuven, Belgium (S.M., M.C., P.V., K.M.).,Department of Life Sciences, Manchester Metropolitan University, United Kingdom (M.C.)
| | - Peter Verhamme
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, KU Leuven, Belgium (S.M., M.C., P.V., K.M.)
| | - Kimberly Martinod
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, KU Leuven, Belgium (S.M., M.C., P.V., K.M.)
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18
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Pérez LA, Leyton L, Valdivia A. Thy-1 (CD90), Integrins and Syndecan 4 are Key Regulators of Skin Wound Healing. Front Cell Dev Biol 2022; 10:810474. [PMID: 35186924 PMCID: PMC8851320 DOI: 10.3389/fcell.2022.810474] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 01/06/2022] [Indexed: 12/12/2022] Open
Abstract
Acute skin wound healing is a multistage process consisting of a plethora of tightly regulated signaling events in specialized cells. The Thy-1 (CD90) glycoprotein interacts with integrins and the heparan sulfate proteoglycan syndecan 4, generating a trimolecular complex that triggers bi-directional signaling to regulate diverse aspects of the wound healing process. These proteins can act either as ligands or receptors, and they are critical for the successful progression of wound healing. The expression of Thy-1, integrins, and syndecan 4 is controlled during the healing process, and the lack of expression of any of these proteins results in delayed wound healing. Here, we review and discuss the roles and regulatory events along the stages of wound healing that support the relevance of Thy-1, integrins, and syndecan 4 as crucial regulators of skin wound healing.
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Affiliation(s)
- Leonardo A. Pérez
- Cellular Communication Laboratory, Program of Cellular & Molecular Biology, Center for Studies on Exercise, Metabolism and Cancer (CEMC), Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences, Universidad de Chile, Santiago, Chile
- Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Lisette Leyton
- Cellular Communication Laboratory, Program of Cellular & Molecular Biology, Center for Studies on Exercise, Metabolism and Cancer (CEMC), Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences, Universidad de Chile, Santiago, Chile
- Faculty of Medicine, Universidad de Chile, Santiago, Chile
- *Correspondence: Lisette Leyton, ; Alejandra Valdivia,
| | - Alejandra Valdivia
- Division of Cardiology, Department of Medicine, Emory University, Atlanta, GA, United States
- *Correspondence: Lisette Leyton, ; Alejandra Valdivia,
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19
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Szeifert V, Kolonics F, Bartos B, Khamari D, Vági P, Barna L, Ligeti E, Lőrincz ÁM. Mac-1 Receptor Clustering Initiates Production of Pro-Inflammatory, Antibacterial Extracellular Vesicles From Neutrophils. Front Immunol 2021; 12:671995. [PMID: 34456905 PMCID: PMC8397541 DOI: 10.3389/fimmu.2021.671995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/26/2021] [Indexed: 12/18/2022] Open
Abstract
Depending on the prevailing environmental conditions, neutrophilic granulocytes release extracellular vesicles (EV) which have either anti-inflammatory effects on other neutrophils or pro-inflammatory and antibacterial effects. In the present study we investigated the molecular mechanisms underlying the biogenesis of functionally heterogenic EVs. We show that selective stimulation of Mac-1 integrin (complement receptor 3) by specific ligands initiates the generation of EVs which are able to impair bacterial growth and to induce the secretion of the pro-inflammatory cytokine IL-8 (aEV). However, direct Mac-1 stimulation results in aEV release only if neutrophils were activated on ligand coated surfaces whereas soluble ligands are ineffective. Using total internal reflection fluorescence (TIRF) microcopy, an increased clustering of Mac-1 molecules could be visualized in neutrophils added to C3bi coated surfaces; moreover antibody induced cluster formation triggers aEV release as well. Mac-1 induced production of aEV apparently necessitates a strong calcium signal as it fully depends on the presence of extracellular calcium. However, initiation of a strong calcium signal by an ionophore only results the generation of EV devoid of any antibacterial or pro-inflammatory effect. Our results thus demonstrate that stimulation and clustering of Mac-1 is necessary and sufficient for initiation of aEV biogenesis. In contrast, an intracellular calcium signal is necessary but by itself not sufficient for the production of antibacterial and pro-inflammatory EVs.
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Affiliation(s)
| | - Ferenc Kolonics
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Balázs Bartos
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Delaram Khamari
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Pál Vági
- Nikon Center of Excellence, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - László Barna
- Nikon Center of Excellence, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - Erzsébet Ligeti
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Ákos M Lőrincz
- Department of Physiology, Semmelweis University, Budapest, Hungary.,Second Department of Internal Medicine, Szent György Hospital, Székesfehérvár, Hungary
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20
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Zhao L, Giannou AD, Xu Y, Shiri AM, Liebold I, Steglich B, Bedke T, Zhang T, Lücke J, Scognamiglio P, Kempski J, Woestemeier A, Chen J, Agalioti T, Zazara DE, Lindner D, Janning M, Hennigs JK, Jagirdar RM, Kotsiou OS, Zarogiannis SG, Kobayashi Y, Izbicki JR, Ghosh S, Rothlin CV, Bosurgi L, Huber S, Gagliani N. Efferocytosis fuels malignant pleural effusion through TIMP1. SCIENCE ADVANCES 2021; 7:7/33/eabd6734. [PMID: 34389533 PMCID: PMC8363144 DOI: 10.1126/sciadv.abd6734] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 06/24/2021] [Indexed: 06/03/2023]
Abstract
Malignant pleural effusion (MPE) results from the capacity of several human cancers to metastasize to the pleural cavity. No effective treatments are currently available, reflecting our insufficient understanding of the basic mechanisms leading to MPE progression. Here, we found that efferocytosis through the receptor tyrosine kinases AXL and MERTK led to the production of interleukin-10 (IL-10) by four distinct pleural cavity macrophage (Mφ) subpopulations characterized by different metabolic states and cell chemotaxis properties. In turn, IL-10 acts on dendritic cells (DCs) inducing the production of tissue inhibitor of metalloproteinases 1 (TIMP1). Genetic ablation of Axl and Mertk in Mφs or IL-10 receptor in DCs or Timp1 substantially reduced MPE progression. Our results delineate an inflammatory cascade-from the clearance of apoptotic cells by Mφs, to production of IL-10, to induction of TIMP1 in DCs-that facilitates MPE progression. This inflammatory cascade offers a series of therapeutic targets for MPE.
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Affiliation(s)
- Lilan Zhao
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Department of General Thoracic Surgery, Fujian Provincial Hospital, Fujian Medical University, 350003 Fuzhou, People's Republic of China
| | - Anastasios D Giannou
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Yang Xu
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Ahmad Mustafa Shiri
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Imke Liebold
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Department of Neurology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Babett Steglich
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Tanja Bedke
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Tao Zhang
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Jöran Lücke
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Pasquale Scognamiglio
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Jan Kempski
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Anna Woestemeier
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Jing Chen
- Department of Pharmacy, Dong Fang Hospital (900 Hospital of the Joint Logistics Team), School of Medicine, Xiamen University, 350025 Fuzhou, People's Republic of China
| | - Theodora Agalioti
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Dimitra E Zazara
- Center for Obstetrics and Pediatrics, Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Diana Lindner
- Department of Cardiology, University Heart and Vascular Center, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Division of Personalized Medical Oncology (A420), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 33 280, 69120 Heidelberg, Germany
| | - Melanie Janning
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Comprehensive Cancer Center Hamburg, University Medical Center Hamburg Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
- Division of Personalized Medical Oncology (A420), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
- Department of Personalized Oncology, University Hospital Mannheim and Medical Faculty Mannheim, University of Heidelberg Theodor-Kutzer Ufer 1-3, 68167 Mannheim, Germany
| | - Jan K Hennigs
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Comprehensive Cancer Center Hamburg, University Medical Center Hamburg Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Rajesh M Jagirdar
- Department of Physiology, Faculty of Medicine, University of Thessaly, BIOPOLIS, Larissa, Greece
- Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, BIOPOLIS, Larissa, Greece
| | - Ourania S Kotsiou
- Department of Physiology, Faculty of Medicine, University of Thessaly, BIOPOLIS, Larissa, Greece
- Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, BIOPOLIS, Larissa, Greece
| | - Sotirios G Zarogiannis
- Department of Physiology, Faculty of Medicine, University of Thessaly, BIOPOLIS, Larissa, Greece
- Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, BIOPOLIS, Larissa, Greece
| | - Yasushi Kobayashi
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Jacob R Izbicki
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Sourav Ghosh
- Department of Neurology, Yale University School of Medicine, New Haven, CT 06510, USA
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Carla V Rothlin
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Lidia Bosurgi
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany.
- Protozoa Immunology, Bernard-Nocht-Institute for Tropical Medicine, 20359 Hamburg, Germany
| | - Samuel Huber
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany.
| | - Nicola Gagliani
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany.
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Immunology and Allergy Unit, Department of Medicine, Solna, Karolinska Institute and University Hospital, 17176 Stockholm, Sweden
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21
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Tan S, Zhang J, Sun Y, Gisterå A, Sheng Z, Malmström RE, Hou M, Peng J, Ma C, Liao W, Li N. Platelets enhance CD4+ central memory T cell responses via platelet factor 4-dependent mitochondrial biogenesis and cell proliferation. Platelets 2021; 33:360-370. [PMID: 34137652 DOI: 10.1080/09537104.2021.1936479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Platelets regulate multiple aspects of CD4+ T cell immunity, and may exert distinct regulations among different T cell subsets. Our aim was to investigate how platelets regulate CD4+ central memory T cell (Tcm) responses. αCD3/αCD28-stimulated human CD4+ Tcm cells were cultured without or with platelets or platelet-derived mediators. Polyclonal stimulation induced cell proliferation and Th1 and Treg cell activation of Tcm cells. Platelet factor 4/PF4 neutralization abolished platelet-enhanced Tcm effector responses, whilst TGFβ neutralization only partially inhibited platelet-enhanced Treg cell activation. PF4 supplementation mimicked the effects of platelet co-cultures, while PF4 receptor CXCR3 blockade and CXCR3 knockdown with siRNAs inhibited or abolished PF4-enhanced Th1 and Treg cell responses. Platelet co-cultures or PF4-treatment increased Tcm cell proliferation, whilst CXCR3 blockade counteracted. PF4-enhanced Tcm proliferation and effector cell responses were associated with mitochondrial biogenesis. Overexpression of mitochondrial transcription factor A (TFAM) mimicked PF4 effects, and PF4 treatment attenuated Akt phosphorylation of activated Tcm cells, leading to mitochondrial biogenesis. Impacts of platelets and PF4 on Tcm proliferation were further confirmed by that CXCR3 knockdown/blockade counteracted PF4-enhanced Tcm cell proliferation. In conclusion, platelets enhance Th1 and Treg cell responses of CD4+ Tcm cells, via PF4-dependent mitochondrial biogenesis and cell proliferation of Tcm cells.
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Affiliation(s)
- Shuai Tan
- Karolinska Institutet, Stockholm, Sweden.,Clinical Epidemiology Unit, Clinical Pharmacology Group, Stockholm, Sweden
| | - Junhao Zhang
- Karolinska Institutet, Stockholm, Sweden.,Clinical Epidemiology Unit, Clinical Pharmacology Group, Stockholm, Sweden.,Nanfang Hospital, Department of Oncology, Southern Medical University, Guangzhou, China
| | - Yang Sun
- Shandong University Cheeloo Medical College, School of Basic Medicine, Department of Immunology, Jinan, China
| | - Anton Gisterå
- Karolinska Institutet, Stockholm, Sweden.,Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Zi Sheng
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Rickard E Malmström
- Clinical Epidemiology Unit, Clinical Pharmacology Group, Stockholm, Sweden.,Department of Laboratory Medicine, Clinical Pharmacology, Karolinska University Hospital-Solna, Stockholm, Sweden
| | - Ming Hou
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Jun Peng
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Chunhong Ma
- Shandong University Cheeloo Medical College, School of Basic Medicine, Department of Immunology, Jinan, China
| | - Wangjun Liao
- Nanfang Hospital, Department of Oncology, Southern Medical University, Guangzhou, China
| | - Nailin Li
- Karolinska Institutet, Stockholm, Sweden.,Clinical Epidemiology Unit, Clinical Pharmacology Group, Stockholm, Sweden
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22
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Jensen RK, Bajic G, Sen M, Springer TA, Vorup-Jensen T, Andersen GR. Complement Receptor 3 Forms a Compact High-Affinity Complex with iC3b. THE JOURNAL OF IMMUNOLOGY 2021; 206:3032-3042. [PMID: 34117107 DOI: 10.4049/jimmunol.2001208] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 04/13/2021] [Indexed: 11/19/2022]
Abstract
Complement receptor 3 (CR3, also known as Mac-1, integrin αMβ2, or CD11b/CD18) is expressed on a subset of myeloid and certain activated lymphoid cells. CR3 is essential for the phagocytosis of complement-opsonized particles such as pathogens and apoptotic or necrotic cells opsonized with the complement fragment iC3b and, to a lesser extent, C3dg. Although the interaction between the iC3b thioester domain and the ligand binding CR3 αM I-domain is structurally and functionally well characterized, the nature of additional CR3-iC3b interactions required for phagocytosis of complement-opsonized objects remains obscure. In this study, we analyzed the interaction between iC3b and the 150-kDa headpiece fragment of the CR3 ectodomain. Surface plasmon resonance experiments demonstrated a 30 nM affinity of the CR3 headpiece for iC3b compared with 515 nM for the iC3b thioester domain, whereas experiments monitoring binding of iC3b to CR3-expressing cells suggested an affinity of 50 nM for the CR3-iC3b interaction. Small angle x-ray scattering analysis revealed that iC3b adopts an extended but preferred conformation in solution. Upon interaction with CR3, iC3b rearranges to form a compact receptor-ligand complex. Overall, the data suggest that the iC3b-CR3 interaction is of high affinity and relies on minor contacts formed between CR3 and regions outside the iC3b thioester domain. Our results rationalize the more efficient phagocytosis elicited by iC3b than by C3dg and pave the way for the development of specific therapeutics for the treatment of inflammatory and neurodegenerative diseases that do not interfere with the recognition of noncomplement CR3 ligands.
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Affiliation(s)
- Rasmus K Jensen
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Goran Bajic
- Laboratory of Molecular Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA.,Department of Pediatrics, Harvard Medical School, Boston, MA.,Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Mehmet Sen
- Department of Biology and Biochemistry, University of Houston, Houston, TX
| | - Timothy A Springer
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA; and
| | | | - Gregers R Andersen
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark;
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23
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Lamers C, Plüss CJ, Ricklin D. The Promiscuous Profile of Complement Receptor 3 in Ligand Binding, Immune Modulation, and Pathophysiology. Front Immunol 2021; 12:662164. [PMID: 33995387 PMCID: PMC8118671 DOI: 10.3389/fimmu.2021.662164] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/12/2021] [Indexed: 12/19/2022] Open
Abstract
The β2-integrin receptor family has a broad spectrum of physiological functions ranging from leukocyte adhesion, cell migration, activation, and communication to the phagocytic uptake of cells and particles. Among the members of this family, complement receptor 3 (CR3; CD11b/CD18, Mac-1, αMβ2) is particularly promiscuous in its functional profile and ligand selectivity. There are close to 100 reported structurally unrelated ligands for CR3, and while many ligands appear to cluster at the αMI domain, molecular details about binding modes remain largely elusive. The versatility of CR3 is reflected in its functional portfolio, which includes prominent roles in the removal of invaders and cell debris, induction of tolerance and synaptic pruning, and involvement in the pathogenesis of numerous autoimmune and chronic inflammatory pathologies. While CR3 is an interesting therapeutic target for immune modulation due to these known pathophysiological associations, drug development efforts are limited by concerns of potential interference with host defense functions and, most importantly, an insufficient molecular understanding of the interplay between ligand binding and functional impact. Here, we provide a systematic summary of the various interaction partners of CR3 with a focus on binding mechanisms and functional implications. We also discuss the roles of CR3 as an immune receptor in health and disease, as an activation marker in research and diagnostics, and as a therapeutic target.
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Affiliation(s)
- Christina Lamers
- Molecular Pharmacy Unit, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
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24
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Feldman C, Anderson R. The role of co-infections and secondary infections in patients with COVID-19. Pneumonia (Nathan) 2021; 13:5. [PMID: 33894790 PMCID: PMC8068564 DOI: 10.1186/s41479-021-00083-w] [Citation(s) in RCA: 155] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 03/12/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND It has been recognised for a considerable time-period, that viral respiratory infections predispose patients to bacterial infections, and that these co-infections have a worse outcome than either infection on its own. However, it is still unclear what exact roles co-infections and/or superinfections play in patients with COVID-19 infection. MAIN BODY This was an extensive review of the current literature regarding co-infections and superinfections in patients with SARS-CoV-2 infection. The definitions used were those of the Centers for Disease Control and Prevention (US), which defines coinfection as one occurring concurrently with the initial infection, while superinfections are those infections that follow on a previous infection, especially when caused by microorganisms that are resistant, or have become resistant, to the antibiotics used earlier. Some researchers have envisioned three potential scenarios of bacterial/SARS-CoV-2 co-infection; namely, secondary SARS-CoV-2 infection following bacterial infection or colonisation, combined viral/bacterial pneumonia, or secondary bacterial superinfection following SARS-CoV-2. There are a myriad of published articles ranging from letters to the editor to systematic reviews and meta-analyses describing varying ranges of co-infection and/or superinfection in patients with COVID-19. The concomitant infections described included other respiratory viruses, bacteria, including mycobacteria, fungi, as well as other, more unusual, pathogens. However, as will be seen in this review, there is often not a clear distinction made in the literature as to what the authors are referring to, whether true concomitant/co-infections or superinfections. In addition, possible mechanisms of the interactions between viral infections, including SARS-CoV-2, and other infections, particularly bacterial infections are discussed further. Lastly, the impact of these co-infections and superinfections in the severity of COVID-19 infections and their outcome is also described. CONCLUSION The current review describes varying rates of co-infections and/or superinfections in patients with COVID-19 infections, although often a clear distinction between the two is not clear in the literature. When they occur, these infections appear to be associated with both severity of COVID-19 as well as poorer outcomes.
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Affiliation(s)
- Charles Feldman
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand Medical School, 7 York Road, Parktown, Johannesburg, 2193, South Africa.
| | - Ronald Anderson
- Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
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25
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Sekheri M, Othman A, Filep JG. β2 Integrin Regulation of Neutrophil Functional Plasticity and Fate in the Resolution of Inflammation. Front Immunol 2021; 12:660760. [PMID: 33859651 PMCID: PMC8043047 DOI: 10.3389/fimmu.2021.660760] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/08/2021] [Indexed: 12/31/2022] Open
Abstract
Neutrophils act as the first line of cellular defense against invading pathogens or tissue injury. Their rapid recruitment into inflamed tissues is critical for the elimination of invading microorganisms and tissue repair, but is also capable of inflicting damage to neighboring tissues. The β2 integrins and Mac-1 (CD11b/CD18, αMβ2 or complement receptor 3) in particular, are best known for mediating neutrophil adhesion and transmigration across the endothelium and phagocytosis of microbes. However, Mac-1 has a broad ligand recognition property that contributes to the functional versatility of the neutrophil population far beyond their antimicrobial function. Accumulating evidence over the past decade has demonstrated roles for Mac-1 ligands in regulating reverse neutrophil transmigration, lifespan, phagocytosis-induced cell death, release of neutrophil extracellular traps and efferocytosis, hence extending the traditional β2 integrin repertoire in shaping innate and adaptive immune responses. Understanding the functions of β2 integrins may partly explain neutrophil heterogeneity and may be instrumental to develop novel therapies specifically targeting Mac-1-mediated pro-resolution actions without compromising immunity. Thus, this review details novel insights on outside-in signaling through β2 integrins and neutrophil functional heterogeneity pertinent to the resolution of inflammation.
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Affiliation(s)
- Meriem Sekheri
- Department of Pathology and Cell Biology, University of Montreal, Montreal, QC, Canada.,Department of Biomedical Sciences, University of Montreal, Montreal, QC, Canada.,Research Center, Maisonneuve-Rosemont Hospital, Montreal, QC, Canada
| | - Amira Othman
- Department of Pathology and Cell Biology, University of Montreal, Montreal, QC, Canada.,Department of Biomedical Sciences, University of Montreal, Montreal, QC, Canada.,Research Center, Maisonneuve-Rosemont Hospital, Montreal, QC, Canada
| | - János G Filep
- Department of Pathology and Cell Biology, University of Montreal, Montreal, QC, Canada.,Research Center, Maisonneuve-Rosemont Hospital, Montreal, QC, Canada
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26
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Feng W, Nguyen H, Shen D, Deng H, Jiang Z, Podolnikova N, Ugarova T, Wang X. Structural Characterization of the Interaction between the α MI-Domain of the Integrin Mac-1 (α Mβ 2) and the Cytokine Pleiotrophin. Biochemistry 2021; 60:182-193. [PMID: 33427449 DOI: 10.1021/acs.biochem.0c00700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Integrin Mac-1 (αMβ2) is an adhesion receptor vital to many functions of myeloid leukocytes. It is also the most promiscuous member of the integrin family capable of recognizing a broad range of ligands. In particular, its ligand-binding αMI-domain is known to bind cationic proteins/peptides depleted in acidic residues. This contradicts the canonical ligand-binding mechanism of αI-domains, which requires an acidic amino acid in the ligand to coordinate the divalent cation within the metal ion-dependent adhesion site (MIDAS) of αI-domains. The lack of acidic amino acids in the αMI-domain-binding sequences suggests the existence of an as-yet uncharacterized interaction mechanism. In the present study, we analyzed interactions of the αMI-domain with a representative Mac-1 ligand, the cationic cytokine pleiotrophin (PTN). Through NMR chemical shift perturbation analysis, cross saturation, NOESY, and mutagenesis studies, we found the interaction between the αMI-domain and PTN is divalent cation-independent and mediated mostly by hydrophobic contacts between the N-terminal domain of PTN and residues in the α5-β5 loop of αMI-domain. The observation that increased ionic strength weakens the interaction between the proteins indicates electrostatic forces may also play a significant role in the binding. On the basis of the results from these experiments, we formulated a model of the interaction between the αMI-domain and PTN.
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27
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Kim HN, Ruan Y, Ogana H, Kim YM. Cadherins, Selectins, and Integrins in CAM-DR in Leukemia. Front Oncol 2020; 10:592733. [PMID: 33425742 PMCID: PMC7793796 DOI: 10.3389/fonc.2020.592733] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/22/2020] [Indexed: 12/12/2022] Open
Abstract
The interaction between leukemia cells and the bone microenvironment is known to provide drug resistance in leukemia cells. This phenomenon, called cell adhesion-mediated drug resistance (CAM-DR), has been demonstrated in many subsets of leukemia including B- and T-acute lymphoblastic leukemia (B- and T-ALL) and acute myeloid leukemia (AML). Cell adhesion molecules (CAMs) are surface molecules that allow cell-cell or cell-extracellular matrix (ECM) adhesion. CAMs not only recognize ligands for binding but also initiate the intracellular signaling pathways that are associated with cell proliferation, survival, and drug resistance upon binding to their ligands. Cadherins, selectins, and integrins are well-known cell adhesion molecules that allow binding to neighboring cells, ECM proteins, and soluble factors. The expression of cadherin, selectin, and integrin correlates with the increased drug resistance of leukemia cells. This paper will review the role of cadherins, selectins, and integrins in CAM-DR and the results of clinical trials targeting these molecules.
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Affiliation(s)
- Hye Na Kim
- Children's Hospital Los Angeles, Keck School of Medicine of University of Southern California, Cancer and Blood Disease Institute, Los Angeles, CA, United States
| | - Yongsheng Ruan
- Children's Hospital Los Angeles, Keck School of Medicine of University of Southern California, Cancer and Blood Disease Institute, Los Angeles, CA, United States.,Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Heather Ogana
- Children's Hospital Los Angeles, Keck School of Medicine of University of Southern California, Cancer and Blood Disease Institute, Los Angeles, CA, United States
| | - Yong-Mi Kim
- Children's Hospital Los Angeles, Keck School of Medicine of University of Southern California, Cancer and Blood Disease Institute, Los Angeles, CA, United States
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28
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Tan S, Li S, Min Y, Gisterå A, Moruzzi N, Zhang J, Sun Y, Andersson J, Malmström RE, Wang M, Berggren PO, Schlisio S, Liao W, Ketelhuth DFJ, Ma C, Li N. Platelet factor 4 enhances CD4 + T effector memory cell responses via Akt-PGC1α-TFAM signaling-mediated mitochondrial biogenesis. J Thromb Haemost 2020; 18:2685-2700. [PMID: 32671959 DOI: 10.1111/jth.15005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 06/10/2020] [Accepted: 07/08/2020] [Indexed: 12/30/2022]
Abstract
BACKGROUND Cell metabolism drives T cell functions, while platelets regulate overall CD4+ T cell immune responses. OBJECTIVE To investigate if platelets influence cell metabolism and thus regulate CD4+ T effector memory cell (Tem) responses. METHODS Human CD4+ Tem cells were activated with αCD3/αCD28 and cultured without or with platelets or platelet-derived mediators. RESULTS Polyclonal stimulation induced rapid and marked Th1 and Treg cell activation of CD4+ Tem cells. Platelet co-culture enhanced Th1 response transiently, while it persistently enhanced Treg cell activation of Tem cells, with an enhancement that plateaued by day 3. Platelet factor 4 (PF4) was the key platelet-derived mediator regulating CD4+ Tem cell responses, which involved cellular metabolisms as indicated by mass spectrometric analyses. PF4 exerted its effects via its receptor CXCR3, attenuated Akt activity, and reduced PGC1α phosphorylation, and resulted in elevations of PGC1α function and mitochondrial transcription factor A (TFAM) synthesis. The latter increased mitochondrial biogenesis, and subsequently enhanced Th1 and Treg responses. Consistent with these observations, inhibition of mitochondrial function by rotenone counteracted the enhancements by recombinant PF4, and TFAM overexpression by TFAM-adenovirus infection mimicked PF4 effects. Furthermore, increased mitochondrial mass elevated oxygen consumption, and enhanced adenosine triphosphate and reactive oxygen species production, which, in turn, stimulated Th1 (T-bet) and Treg (FoxP3) transcription factor expression and corresponding CD4+ T effector cell responses. CONCLUSIONS Platelets enhance CD4+ T cell responses of Tem cells through PF4-dependent and Akt-PGC1α-TFAM signaling-mediated mitochondrial biogenesis. Hence, PF4 may be a promising intervention target of platelet-regulated immune responses.
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Affiliation(s)
- Shuai Tan
- Department of Medicine-Solna, Clinical Epidemiology Unit, Clinical Pharmacology Group, Karolinska Institutet, Stockholm, Sweden
| | - Shuijie Li
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Yanan Min
- Department of Medicine-Solna, Clinical Epidemiology Unit, Clinical Pharmacology Group, Karolinska Institutet, Stockholm, Sweden
| | - Anton Gisterå
- Department of Medicine-Solna, Cardiovascular Medicine Unit, Karolinska Institutet, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Noah Moruzzi
- Department of Molecular Medicine and Surgery, Rolf Ruft Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Junhao Zhang
- Department of Medicine-Solna, Clinical Epidemiology Unit, Clinical Pharmacology Group, Karolinska Institutet, Stockholm, Sweden
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yang Sun
- Shandong University Cheeloo Medical College, Institute of Immunology, Jinan, China
| | - John Andersson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Rickard E Malmström
- Department of Medicine-Solna, Clinical Epidemiology Unit, Clinical Pharmacology Group, Karolinska Institutet, Stockholm, Sweden
- Department of Laboratory Medicine, Clinical Pharmacology, Karolinska University Hospital-Solna, Stockholm, Sweden
| | - Miao Wang
- Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Per-Olof Berggren
- Department of Molecular Medicine and Surgery, Rolf Ruft Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Susanne Schlisio
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Wangjun Liao
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Daniel F J Ketelhuth
- Department of Medicine-Solna, Cardiovascular Medicine Unit, Karolinska Institutet, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Chunhong Ma
- Shandong University Cheeloo Medical College, Institute of Immunology, Jinan, China
| | - Nailin Li
- Department of Medicine-Solna, Clinical Epidemiology Unit, Clinical Pharmacology Group, Karolinska Institutet, Stockholm, Sweden
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29
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Feldman C, Anderson R. Platelets and Their Role in the Pathogenesis of Cardiovascular Events in Patients With Community-Acquired Pneumonia. Front Immunol 2020; 11:577303. [PMID: 33042161 PMCID: PMC7527494 DOI: 10.3389/fimmu.2020.577303] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 08/24/2020] [Indexed: 12/21/2022] Open
Abstract
Community-acquired pneumonia (CAP) remains an important cause of morbidity and mortality throughout the world with much recent and ongoing research focused on the occurrence of cardiovascular events (CVEs) during the infection, which are associated with adverse short-term and long-term survival. Much of the research directed at unraveling the pathogenesis of these events has been undertaken in the settings of experimental and clinical CAP caused by the dangerous, bacterial respiratory pathogen, Streptococcus pneumoniae (pneumococcus), which remains the most common bacterial cause of CAP. Studies of this type have revealed that although platelets play an important role in host defense against infection, there is also increasing recognition that hyperactivation of these cells contributes to a pro-inflammatory, prothrombotic systemic milieu that contributes to the etiology of CVEs. In the case of the pneumococcus, platelet-driven myocardial damage and dysfunction is exacerbated by the direct cardiotoxic actions of pneumolysin, a major pore-forming toxin of this pathogen, which also acts as potent activator of platelets. This review is focused on the role of platelets in host defense against infection, including pneumococcal infection in particular, and reviews the current literature describing the potential mechanisms by which platelet activation contributes to cardiovascular complications in CAP. This is preceded by an evaluation of the burden of pneumococcal infection in CAP, the clinical features and putative pathogenic mechanisms of the CVE, and concludes with an evaluation of the potential utility of the anti-platelet activity of macrolides and various adjunctive therapies.
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Affiliation(s)
- Charles Feldman
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Ronald Anderson
- Department of Immunology, Faculty of Health Sciences, Institute of Cellular and Molecular Medicine, University of Pretoria, Pretoria, South Africa
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30
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Abstract
Platelets are increasingly being recognized for playing roles beyond thrombosis and hemostasis. Today we know that they mediate inflammation by direct interactions with innate immune cells or secretion of cytokines/chemokines. Here we review their interactions with neutrophils and monocytes/macrophages in infection and sepsis, stroke, myocardial infarction and venous thromboembolism. We discuss new roles for platelet surface receptors like GPVI or GPIb and also look at platelet contributions to the formation of neutrophil extracellular traps (NETs) as well as to deep vein thrombosis during infection, e.g. in COVID-19 patients.
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Affiliation(s)
- Kimberly Martinod
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Belgium
| | - Carsten Deppermann
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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31
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Trotta A, Milillo MA, Serafino A, Castillo LA, Birnberg Weiss F, Delpino MV, Giambartolomei GH, Fernández GC, Barrionuevo P. Brucella abortus-infected platelets modulate the activation of neutrophils. Immunol Cell Biol 2020; 98:743-756. [PMID: 32623755 DOI: 10.1111/imcb.12373] [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: 03/16/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 01/18/2023]
Abstract
Brucellosis is a contagious disease caused by bacteria of the genus Brucella. Platelets (PLTs) have been widely involved in the modulation of the immune response. We have previously reported the modulation of Brucella abortus-mediated infection of monocytes. As a result, PLTs cooperate with monocytes and increase their inflammatory capacity, promoting the resolution of the infection. Extending these results, in this study we demonstrate that patients with brucellosis present slightly elevated levels of complexes between PLTs and both monocytes and neutrophils. We then assessed whether PLTs were capable of modulating functional aspects of neutrophils. The presence of PLTs throughout neutrophil infection increased the production of interleukin-8, CD11b surface expression and reactive oxygen species formation, whereas it decreased the expression of CD62L, indicating an activated status of these cells. We next analyzed whether this modulation was mediated by released factors. To discriminate between these options, neutrophils were treated with supernatants collected from B. abortus-infected PLTs. Our results show that CD11b expression was induced by soluble factors of PLTs but direct contact between cell populations was needed to enhance the respiratory burst. Additionally, B. abortus-infected PLTs recruit polymorphonuclear (PMN) cells to the site of infection. Finally, the presence of PLTs did not modify the initial invasion of PMN cells by B. abortus but improved the control of the infection at extended times. Altogether, our results demonstrate that PLTs interact with neutrophils and promote a proinflammatory phenotype which could also contribute to the resolution of the infection.
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Affiliation(s)
- Aldana Trotta
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
| | - M Ayelén Milillo
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
| | - Agustina Serafino
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
| | - Luis A Castillo
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
| | - Federico Birnberg Weiss
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
| | - M Victoria Delpino
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), CONICET, Buenos Aires, Argentina
| | | | - Gabriela C Fernández
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
| | - Paula Barrionuevo
- Instituto de Medicina Experimental (CONICET-Academia Nacional de Medicina), Buenos Aires, Argentina
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32
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Generation and characterization of U937-TR: a platform cell line for inducible gene expression in human macrophages. Parasitology 2020; 147:1524-1531. [PMID: 32713391 DOI: 10.1017/s0031182020001110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Monocytes and macrophages are involved in a wide range of biological processes and parasitic diseases. The characterization of the molecular mechanisms governing such processes usually requires precise control of the expression of genes of interest. We implemented a tetracycline-controlled gene expression system in the U937 cell line, one of the most used in vitro models for the research of human monocytes and macrophages. Here we characterized U937-derived cell lines in terms of phenotypic (morphology and marker expression) and functional (capacity for phagocytosis and for Leishmania parasite hosting) changes induced by phorbol-12-myristate-13-acetate (PMA). Finally, we provide evidence of tetracycline-inducible and reversible Lamin-A gene silencing of the PMA-differentiated U937-derived cells.
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33
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Mulet M, Zamora C, Porcel JM, Nieto JC, Pajares V, Muñoz-Fernandez AM, Calvo N, Esquerda A, Vidal S. Platelet factor 4 regulates T cell effector functions in malignant pleural effusions. Cancer Lett 2020; 491:78-86. [PMID: 32726613 DOI: 10.1016/j.canlet.2020.06.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 01/12/2023]
Abstract
Malignant pleural effusion (MPE) is defined as the presence of tumor cells in pleural fluid and it is a fatal complication of advanced lung adenocarcinoma (LAC). To understand the immune response to the tumor in MPE, we compared the concentration of immunomodulatory factors in MPE of LAC and pleural effusion of heart failure (HF) patients by ELISA, and the proliferation and cytotoxic phenotype of T cells stimulated in the presence of LAC and HF pleural fluids by cytometry. Platelet factor 4 (PF4), vascular endothelial growth factor (VEGF), transforming growth factor beta (TGF-β) and P-selectin levels were higher in LAC than in HF pleural fluids. However, plasmatic PF4 and P-selectin levels were similar in LAC and HF. VEGF positively correlated with TGF-β and sPD-L1 in LAC but not in HF pleural fluids. LAC pleural fluids also inhibited T lymphocyte proliferation and cytotoxicity and reduced IL-17 production. PF4 levels inversely correlated with T cell function. The high content of PF4 in MPE was associated with poor prognosis. Our findings suggest that an impaired response of T lymphocytes induced by PF4 provides a significant advantage for tumor progression.
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Affiliation(s)
- Maria Mulet
- Department Immunology, Institut Recerca Hospital de La Santa Creu i Sant Pau, Barcelona, Spain
| | - Carlos Zamora
- Department Immunology, Institut Recerca Hospital de La Santa Creu i Sant Pau, Barcelona, Spain
| | - José M Porcel
- Pleural Medicine Unit, Department of Internal Medicine, Hospital Universitari Arnau de Vilanova, IRBLleida, University of Lleida, Lleida, Spain
| | - Juan C Nieto
- Department Immunology, Institut Recerca Hospital de La Santa Creu i Sant Pau, Barcelona, Spain
| | - Virginia Pajares
- Department Pneumology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | | | - Nuria Calvo
- Department Oncology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Aureli Esquerda
- Department of Laboratory Medicine, Hospital Universitari Arnau de Vilanova, IRBLleida, University of Lleida, Lleida, Spain
| | - Silvia Vidal
- Department Immunology, Institut Recerca Hospital de La Santa Creu i Sant Pau, Barcelona, Spain.
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Hou L, Qu X, Qiu X, Huang R, Zhao X, Wang Q. Integrin CD11b mediates locus coeruleus noradrenergic neurodegeneration in a mouse Parkinson's disease model. J Neuroinflammation 2020; 17:148. [PMID: 32375810 PMCID: PMC7201626 DOI: 10.1186/s12974-020-01823-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 04/22/2020] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND The loss of locus coeruleus noradrenergic (LC/NE) neurons in the brainstem is reported in multiple neurodegenerative disorders, including Parkinson's disease (PD). However, the mechanisms remain unclear. Strong evidence suggested that microglia-mediated neuroinflammation contributes to neurodegeneration in PD. We recently recognized integrin CD11b, the α-chain of macrophage antigen complex-1 (Mac-1, also called CR3), as a key regulator for microglial activation. However, whether CD11b is involved in LC/NE neurodegeneration in PD remains to be investigated. METHODS LC/NE neurodegeneration and microglial activation were compared between wild type (WT) and CD11b KO mice after treated with paraquat and maneb, two pesticides that widely used to create PD model. The role of NLRP3 inflammasome in CD11b-mediated microglial dysfunction and LC/NE neurodegeneration was further explored. LC/NE neurodegeneration, microglial phenotype, and NLRP3 inflammasome activation were determined by using Western blot, immunohistochemistry, and RT-PCR technologies. RESULTS Paraquat and maneb co-exposure elevated the expressions of CD11b in the brainstem of mice, and CD11b knockout significantly reduced LC/NE neurodegeneration induced by paraquat and maneb. Mitigated microglial activation and gene expressions of proinflammatory cytokines were also observed in paraquat and maneb-treated CD11b-/- mice. Mechanistically, CD11b-mediated NLRP3 inflammasome activation contributes to paraquat and maneb-induced LC/NE neurodegeneration. Compared with WT controls, CD11b deficiency reduced paraquat and maneb-induced NLRP3 expression, caspase-1 activation, and interleukin-1β production in mice. Furthermore, inhibition of NLRP3 inflammasome by glybenclamide, a sulfonylurea inhibitor of NLRP3 inflammasome, was found to be able to suppress microglial proinflammatory activation and nuclear factor-κB activation induced by paraquat and maneb. Moreover, reduced reactive oxygen species production, NADPH oxidase, and inducible nitric oxide synthase expressions as well as 4-hydroxynonenal and malondialdehyde levels were detected in combined glybenclamide and paraquat and maneb-treated mice compared with paraquat and maneb alone group. Finally, we found that glybenclamide treatment ameliorated LC/NE neurodegeneration and α-synuclein aggregation in paraquat and maneb-treated mice. CONCLUSION Our findings suggested that CD11b mediates LC/NE neurodegeneration through NLRP3 inflammation-dependent microglial proinflammatory activation in a two pesticide-induced mouse PD model, providing a novel insight into the immune pathogenesis of LC/NE neuronal damage in related disorders.
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Affiliation(s)
- Liyan Hou
- School of Public Health, Dalian Medical University, Dalian, 116044, China
| | - Xingyue Qu
- Department of Clinical Nutrition, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Xiaofei Qiu
- Qingdao Municipal Center for Disease Control & Prevention/Qingdao Institute of Preventive Medicine, Qingdao, 266033, China.,School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China
| | - Ruixue Huang
- School of Public Health, Dalian Medical University, Dalian, 116044, China
| | - Xiulan Zhao
- School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.
| | - Qingshan Wang
- School of Public Health, Dalian Medical University, Dalian, 116044, China. .,National-Local Joint Engineering Research Center for Drug-Research and Development (R & D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, 116044, China.
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35
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Xiang M, Grosso RA, Takeda A, Pan J, Bekkhus T, Brulois K, Dermadi D, Nordling S, Vanlandewijck M, Jalkanen S, Ulvmar MH, Butcher EC. A Single-Cell Transcriptional Roadmap of the Mouse and Human Lymph Node Lymphatic Vasculature. Front Cardiovasc Med 2020; 7:52. [PMID: 32426372 PMCID: PMC7204639 DOI: 10.3389/fcvm.2020.00052] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 03/18/2020] [Indexed: 01/08/2023] Open
Abstract
Single-cell transcriptomics promise to revolutionize our understanding of the vasculature. Emerging computational methods applied to high-dimensional single-cell data allow integration of results between samples and species and illuminate the diversity and underlying developmental and architectural organization of cell populations. Here, we illustrate these methods in the analysis of mouse lymph node (LN) lymphatic endothelial cells (LEC) at single-cell resolution. Clustering identifies five well-delineated subsets, including two medullary sinus subsets not previously recognized as distinct. Nearest neighbor alignments in trajectory space position the major subsets in a sequence that recapitulates the known features and suggests novel features of LN lymphatic organization, providing a transcriptional map of the lymphatic endothelial niches and of the transitions between them. Differences in gene expression reveal specialized programs for (1) subcapsular ceiling endothelial interactions with the capsule connective tissue and cells; (2) subcapsular floor regulation of lymph borne cell entry into the LN parenchyma and antigen presentation; and (3) pathogen interactions and (4) LN remodeling in distinct medullary subsets. LEC of the subcapsular sinus floor and medulla, which represent major sites of cell entry and exit from the LN parenchyma respectively, respond robustly to oxazolone inflammation challenge with enriched signaling pathways that converge on both innate and adaptive immune responses. Integration of mouse and human single-cell profiles reveals a conserved cross-species pattern of lymphatic vascular niches and gene expression, as well as specialized human subsets and genes unique to each species. The examples provided demonstrate the power of single-cell analysis in elucidating endothelial cell heterogeneity, vascular organization, and endothelial cell responses. We discuss the findings from the perspective of LEC functions in relation to niche formations in the unique stromal and highly immunological environment of the LN.
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Affiliation(s)
- Menglan Xiang
- Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA, United States
- Palo Alto Veterans Institute for Research, Palo Alto, CA, United States
- The Center for Molecular Biology and Medicine, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
| | - Rubén Adrián Grosso
- The Beijer Laboratory, Department Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Akira Takeda
- MediCity Research Laboratory and Institute of Biomedicine, University of Turku, Turku, Finland
| | - Junliang Pan
- Palo Alto Veterans Institute for Research, Palo Alto, CA, United States
- The Center for Molecular Biology and Medicine, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
| | - Tove Bekkhus
- The Beijer Laboratory, Department Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Kevin Brulois
- Palo Alto Veterans Institute for Research, Palo Alto, CA, United States
- The Center for Molecular Biology and Medicine, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
| | - Denis Dermadi
- Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA, United States
- Palo Alto Veterans Institute for Research, Palo Alto, CA, United States
| | - Sofia Nordling
- Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA, United States
- Palo Alto Veterans Institute for Research, Palo Alto, CA, United States
- The Center for Molecular Biology and Medicine, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
| | - Michael Vanlandewijck
- The Beijer Laboratory, Department Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
- Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Stockholm, Sweden
| | - Sirpa Jalkanen
- MediCity Research Laboratory and Institute of Biomedicine, University of Turku, Turku, Finland
| | - Maria H. Ulvmar
- The Beijer Laboratory, Department Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
| | - Eugene C. Butcher
- Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA, United States
- Palo Alto Veterans Institute for Research, Palo Alto, CA, United States
- The Center for Molecular Biology and Medicine, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
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36
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Torres-Gomez A, Cabañas C, Lafuente EM. Phagocytic Integrins: Activation and Signaling. Front Immunol 2020; 11:738. [PMID: 32425937 PMCID: PMC7203660 DOI: 10.3389/fimmu.2020.00738] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 03/31/2020] [Indexed: 01/06/2023] Open
Abstract
Phagocytic integrins are endowed with the ability to engulf and dispose of particles of different natures. Evolutionarily conserved from worms to humans, they are involved in pathogen elimination and apoptotic and tumoral cell clearance. Research in the field of integrin-mediated phagocytosis has shed light on the molecular events controlling integrin activation and their effector functions. However, there are still some aspects of the regulation of the phagocytic process that need to be clarified. Here, we have revised the molecular events controlling phagocytic integrin activation and the downstream signaling driving particle engulfment, and we have focused particularly on αMβ2/CR3, αXβ2/CR4, and a brief mention of αVβ5/αVβ3integrins.
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Affiliation(s)
- Alvaro Torres-Gomez
- Department of Immunology, Ophthalmology and Otorhinolaryngology, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
| | - Carlos Cabañas
- Department of Immunology, Ophthalmology and Otorhinolaryngology, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain.,Severo Ochoa Center for Molecular Biology (CSIC-UAM), Madrid, Spain
| | - Esther M Lafuente
- Department of Immunology, Ophthalmology and Otorhinolaryngology, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (i+12), Madrid, Spain
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Bednarczyk M, Stege H, Grabbe S, Bros M. β2 Integrins-Multi-Functional Leukocyte Receptors in Health and Disease. Int J Mol Sci 2020; 21:E1402. [PMID: 32092981 PMCID: PMC7073085 DOI: 10.3390/ijms21041402] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/11/2020] [Accepted: 02/14/2020] [Indexed: 12/25/2022] Open
Abstract
β2 integrins are heterodimeric surface receptors composed of a variable α (CD11a-CD11d) and a constant β (CD18) subunit and are specifically expressed by leukocytes. The α subunit defines the individual functional properties of the corresponding β2 integrin, but all β2 integrins show functional overlap. They mediate adhesion to other cells and to components of the extracellular matrix (ECM), orchestrate uptake of extracellular material like complement-opsonized pathogens, control cytoskeletal organization, and modulate cell signaling. This review aims to delineate the tremendous role of β2 integrins for immune functions as exemplified by the phenotype of LAD-I (leukocyte adhesion deficiency 1) patients that suffer from strong recurrent infections. These immune defects have been largely attributed to impaired migratory and phagocytic properties of polymorphonuclear granulocytes. The molecular base for this inherited disease is a functional impairment of β2 integrins due to mutations within the CD18 gene. LAD-I patients are also predisposed for autoimmune diseases. In agreement, polymorphisms within the CD11b gene have been associated with autoimmunity. Consequently, β2 integrins have received growing interest as targets in the treatment of autoimmune diseases. Moreover, β2 integrin activity on leukocytes has been implicated in tumor development.
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Affiliation(s)
| | | | | | - Matthias Bros
- Department of Dermatology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (M.B.); (H.S.); (S.G.)
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38
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Koenen RR. No hearty reception: infusion of CXCL4 impedes tissue repair by macrophages after myocardial infarction. Cardiovasc Res 2019; 115:264-265. [PMID: 30295755 DOI: 10.1093/cvr/cvy241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Rory R Koenen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, PO Box 616, 6200 MD Maastricht, the Netherlands
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39
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Fendl B, Eichhorn T, Weiss R, Tripisciano C, Spittler A, Fischer MB, Weber V. Differential Interaction of Platelet-Derived Extracellular Vesicles With Circulating Immune Cells: Roles of TAM Receptors, CD11b, and Phosphatidylserine. Front Immunol 2018; 9:2797. [PMID: 30619243 PMCID: PMC6297748 DOI: 10.3389/fimmu.2018.02797] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 11/13/2018] [Indexed: 01/08/2023] Open
Abstract
Secretion and exchange of biomolecules by extracellular vesicles (EVs) are crucial in intercellular communication and enable cells to adapt to alterations in their microenvironment. EVs are involved in a variety of cellular processes under physiological conditions as well as in pathological settings. In particular, they exert profound effects on the innate immune system, and thereby are also capable of modulating adaptive immunity. The mechanisms underlying their interaction with their recipient cells, particularly their preferential association with monocytes and granulocytes in the circulation, however, remain to be further clarified. Surface molecules exposed on EVs are likely to mediate immune recognition and EV uptake by their recipient cells. Here, we investigated the involvement of Tyro3, Axl, and Mer (TAM) tyrosine kinase receptors and of integrin CD11b in the binding of platelet-derived EVs, constituting the large majority of circulating EVs, to immune cells in the circulation. Flow cytometry and Western Blotting demonstrated a differential expression of TAM receptors and CD11b on monocytes, granulocytes, and lymphocytes, as well as on monocyte subsets. Of the TAM receptors, only Axl and Mer were detected at low levels on monocytes and granulocytes, but not on lymphocytes. Likewise, CD11b was present on circulating monocytes and granulocytes, but remained undetectable on lymphocytes. Differentiation of monocytes into classical, intermediate, and non-classical monocyte subsets revealed distinct expression patterns of Mer and activated CD11b. Co-incubation of isolated monocytes and granulocytes with platelet-derived EVs showed that the binding of EVs to immune cells was dependent on Ca++. Our data do not support a particular role for TAM receptors or for activated CD11b in the association of platelet-derived EVs with monocytes and granulocytes in the circulation, as anti-TAM antibodies did not interfere with EV binding to isolated immune cells, as binding was not dependent on the presence of TIM4 acting synergistically with TAM receptors, and as neither low levels of Gas6, required as a linker between phosphatidylserine (PS) on the EV surface and TAM receptors on immune cells, nor masking of PS on the EV surface did interfere with EV binding.
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Affiliation(s)
- Birgit Fendl
- Christian Doppler Laboratory for Innovative Therapy Approaches in Sepsis, Department for Biomedical Research, Danube University Krems, Krems, Austria
| | - Tanja Eichhorn
- Christian Doppler Laboratory for Innovative Therapy Approaches in Sepsis, Department for Biomedical Research, Danube University Krems, Krems, Austria
| | - René Weiss
- Christian Doppler Laboratory for Innovative Therapy Approaches in Sepsis, Department for Biomedical Research, Danube University Krems, Krems, Austria
| | - Carla Tripisciano
- Christian Doppler Laboratory for Innovative Therapy Approaches in Sepsis, Department for Biomedical Research, Danube University Krems, Krems, Austria
| | - Andreas Spittler
- Core Facility Flow Cytometry & Surgical Research Laboratories, Medical University of Vienna, Vienna, Austria
| | - Michael B Fischer
- Christian Doppler Laboratory for Innovative Therapy Approaches in Sepsis, Department for Biomedical Research, Danube University Krems, Krems, Austria
| | - Viktoria Weber
- Christian Doppler Laboratory for Innovative Therapy Approaches in Sepsis, Department for Biomedical Research, Danube University Krems, Krems, Austria
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