1
|
Klaus T, Hieber C, Bros M, Grabbe S. Integrins in Health and Disease-Suitable Targets for Treatment? Cells 2024; 13:212. [PMID: 38334604 PMCID: PMC10854705 DOI: 10.3390/cells13030212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/13/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Integrin receptors are heterodimeric surface receptors that play multiple roles regarding cell-cell communication, signaling, and migration. The four members of the β2 integrin subfamily are composed of an alternative α (CD11a-d) subunit, which determines the specific receptor properties, and a constant β (CD18) subunit. This review aims to present insight into the multiple immunological roles of integrin receptors, with a focus on β2 integrins that are specifically expressed by leukocytes. The pathophysiological role of β2 integrins is confirmed by the drastic phenotype of patients suffering from leukocyte adhesion deficiencies, most often resulting in severe recurrent infections and, at the same time, a predisposition for autoimmune diseases. So far, studies on the role of β2 integrins in vivo employed mice with a constitutive knockout of all β2 integrins or either family member, respectively, which complicated the differentiation between the direct and indirect effects of β2 integrin deficiency for distinct cell types. The recent generation and characterization of transgenic mice with a cell-type-specific knockdown of β2 integrins by our group has enabled the dissection of cell-specific roles of β2 integrins. Further, integrin receptors have been recognized as target receptors for the treatment of inflammatory diseases as well as tumor therapy. However, whereas both agonistic and antagonistic agents yielded beneficial effects in animal models, the success of clinical trials was limited in most cases and was associated with unwanted side effects. This unfavorable outcome is most probably related to the systemic effects of the used compounds on all leukocytes, thereby emphasizing the need to develop formulations that target distinct types of leukocytes to modulate β2 integrin activity for therapeutic applications.
Collapse
Affiliation(s)
| | | | | | - Stephan Grabbe
- Department of Dermatology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (T.K.); (C.H.); (M.B.)
| |
Collapse
|
2
|
Carroll JA, Striebel JF, Baune C, Chesebro B, Race B. CD11c is not required by microglia to convey neuroprotection after prion infection. PLoS One 2023; 18:e0293301. [PMID: 37910561 PMCID: PMC10619787 DOI: 10.1371/journal.pone.0293301] [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] [Received: 07/10/2023] [Accepted: 10/10/2023] [Indexed: 11/03/2023] Open
Abstract
Prion diseases are caused by the misfolding of a normal host protein that leads to gliosis, neuroinflammation, neurodegeneration, and death. Microglia have been shown to be critical for neuroprotection during prion infection of the central nervous system (CNS), and their presence extends survival in mice. How microglia impart these benefits to the infected host are unknown. Previous transcriptomics and bioinformatics studies suggested that signaling through the heterodimeric integrin receptor CD11c/CD18, expressed by microglia in the brain, might be important to microglial function during prion disease. Herein, we intracerebrally challenged CD11c-/- mice with prion strain RML and compared them to similarly infected C57BL/6 mice as controls. We initially assessed changes in the brain that are associated with disease such as astrogliosis, microgliosis, prion accumulation, and survival. Targeted qRT-PCR arrays were used to determine alterations in transcription in mice in response to prion infection. We demonstrate that expression of Itgax (CD11c) and Itgb2 (CD18) increases in the CNS in correlation with advancing prion infection. Gliosis, neuropathology, prion deposition, and disease progression in prion infected CD11c deficient mice were comparable to infected C57BL/6 mice. Additionally, both CD11c deficient and C57BL/6 prion-infected mouse cohorts had a similar consortium of inflammatory- and phagocytosis-associated genes that increased as disease progressed to clinical stages. Ingenuity Pathway Analysis of upregulated genes in infected C57BL/6 mice suggested numerous cell-surface transmembrane receptors signal through Spleen Tyrosine Kinase, a potential key regulator of phagocytosis and innate immune activation in the prion infected brain. Ultimately, the deletion of CD11c did not influence prion pathogenesis in mice and CD11c signaling is not involved in the neuroprotection provided by microglia, but our analysis identified a conspicuous phagocytosis pathway in the CNS of infected mice that appeared to be activated during prion pathogenesis.
Collapse
Affiliation(s)
- James A. Carroll
- Laboratory of Neurological Infections and Immunity, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America
| | - James F. Striebel
- Laboratory of Neurological Infections and Immunity, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America
| | - Chase Baune
- Laboratory of Neurological Infections and Immunity, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America
| | - Bruce Chesebro
- Laboratory of Neurological Infections and Immunity, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America
| | - Brent Race
- Laboratory of Neurological Infections and Immunity, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America
| |
Collapse
|
3
|
Dart RJ, Zlatareva I, Vantourout P, Theodoridis E, Amar A, Kannambath S, East P, Recaldin T, Mansfield JC, Lamb CA, Parkes M, Irving PM, Prescott NJ, Hayday AC. Conserved γδ T cell selection by BTNL proteins limits progression of human inflammatory bowel disease. Science 2023; 381:eadh0301. [PMID: 37708268 PMCID: PMC7615126 DOI: 10.1126/science.adh0301] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 07/19/2023] [Indexed: 09/16/2023]
Abstract
Murine intraepithelial γδ T cells include distinct tissue-protective cells selected by epithelial butyrophilin-like (BTNL) heteromers. To determine whether this biology is conserved in humans, we characterized the colonic γδ T cell compartment, identifying a diverse repertoire that includes a phenotypically distinct subset coexpressing T cell receptor Vγ4 and the epithelium-binding integrin CD103. This subset was disproportionately diminished and dysregulated in inflammatory bowel disease, whereas on-treatment CD103+γδ T cell restoration was associated with sustained inflammatory bowel disease remission. Moreover, CD103+Vγ4+cell dysregulation and loss were also displayed by humans with germline BTNL3/BTNL8 hypomorphism, which we identified as a risk factor for penetrating Crohn's disease (CD). Thus, BTNL-dependent selection and/or maintenance of distinct tissue-intrinsic γδ T cells appears to be an evolutionarily conserved axis limiting the progression of a complex, multifactorial, tissue-damaging disease of increasing global incidence.
Collapse
Affiliation(s)
- Robin J Dart
- Peter Gorer Dept of Immunobiology, King’s College London at Guy’s Hospital Campus, London, United Kingdom
- Immunosurveillance Laboratory, The Francis Crick Institute, London, UK
- Department of Gastroenterology, Guy’s and St Thomas’ Foundation Trust, London, UK
| | - Iva Zlatareva
- Peter Gorer Dept of Immunobiology, King’s College London at Guy’s Hospital Campus, London, United Kingdom
- Immunosurveillance Laboratory, The Francis Crick Institute, London, UK
| | - Pierre Vantourout
- Peter Gorer Dept of Immunobiology, King’s College London at Guy’s Hospital Campus, London, United Kingdom
- Immunosurveillance Laboratory, The Francis Crick Institute, London, UK
| | - Efstathios Theodoridis
- Peter Gorer Dept of Immunobiology, King’s College London at Guy’s Hospital Campus, London, United Kingdom
- Immunosurveillance Laboratory, The Francis Crick Institute, London, UK
| | - Ariella Amar
- Department of Medical and Molecular Genetics, King’s College London, London, UK
| | | | - Philip East
- Bioinformatics and Biostatistics, The Francis Crick Institute, London, UK
| | | | - John C Mansfield
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
- Department of Gastroenterology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Royal Victoria Infirmary, Newcastle upon Tyne, UK
| | - Christopher A Lamb
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
- Department of Gastroenterology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Royal Victoria Infirmary, Newcastle upon Tyne, UK
| | - Miles Parkes
- Department of Medicine, Addenbrooke’s Hospital, University of Cambridge, Cambridge, UK
| | - Peter M Irving
- Department of Gastroenterology, Guy’s and St Thomas’ Foundation Trust, London, UK
| | - Natalie J Prescott
- Department of Medical and Molecular Genetics, King’s College London, London, UK
| | - Adrian C Hayday
- Peter Gorer Dept of Immunobiology, King’s College London at Guy’s Hospital Campus, London, United Kingdom
- Immunosurveillance Laboratory, The Francis Crick Institute, London, UK
| |
Collapse
|
4
|
Tsukui D, Kimura Y, Kono H. GM-CSF receptor/SYK/JNK/FOXO1/CD11c signaling promotes atherosclerosis. iScience 2023; 26:107293. [PMID: 37520709 PMCID: PMC10382675 DOI: 10.1016/j.isci.2023.107293] [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: 12/22/2022] [Revised: 04/30/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023] Open
Abstract
Atherosclerosis complicates chronic inflammatory diseases, such as rheumatoid arthritis and systemic lupus erythematosus, suggesting that a shared physiological pathway regulates inflammatory responses in these diseases wherein spleen tyrosine kinase (SYK) is involved. We aimed to identify a shared therapeutic target for atherosclerosis and inflammatory diseases. We used Syk-knockout atherosclerosis-prone mice to determine whether SYK is involved in atherosclerosis via the inflammatory response and elucidate the mechanism of SYK signaling. The Syk-knockout mice showed reduced atherosclerosis in vivo, and macrophages derived from this strain showed ameliorated cell migration in vitro. CD11c expression decreased on Syk-knockout monocytes and macrophages; it was upregulated by forkhead box protein O1 (FOXO1) after stimulation with granulocyte-macrophage colony-stimulating factor (GM-CSF), and c-Jun amino-terminal kinase (JNK) mediated SYK signaling to FOXO1. Furthermore, FOXO1 inhibitor treatment mitigated atherosclerosis in mice. Thus, GM-CSF receptor/SYK/JNK/FOXO1/CD11c signaling in monocytes and macrophages and FOXO1 could be therapeutic targets for atherosclerosis and inflammatory diseases.
Collapse
Affiliation(s)
- Daisuke Tsukui
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
| | - Yoshitaka Kimura
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
- Department of Microbiology and Immunology, Teikyo University School of Medicine, Tokyo 173-8605, Japan
| | - Hajime Kono
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo 173-8605, Japan
| |
Collapse
|
5
|
Mandala WL. Expression of CD11a, CD11b, CD11c, and CD18 on Neutrophils from Different Clinical Types of Malaria in Malawian Children. J Blood Med 2022; 13:1-10. [PMID: 35018127 PMCID: PMC8742601 DOI: 10.2147/jbm.s343109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 12/15/2021] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Malaria in individuals who have never had an infection before is usually characterized by an inflammatory response that is linked to the expression of specific activation markers on cells of the innate immune system. METHODS This study investigated absolute white blood cell (WBC) and neutrophil counts and expression of several adhesion markers on neutrophils from HIV-uninfected children who were suffering from cerebral malaria (n=35), severe malarial anemia (SMA, n=39), and uncomplicated malaria (n=49) and healthy aparasitemic children (n=33) in Blantyre, Malawi. RESULTS All clinical malaria groups had higher WBC and neutrophil counts compared to healthy controls, with the acute SMA group having significantly (p<0.0001) higher WBC counts than the controls. These elevated counts normalized during recovery. Surprisingly, in all clinical malaria groups, the surface expression of CD11b, CD11c, and CD18 on neutrophils was lower than in healthy controls, again normalizing during convalescence. CONCLUSION In areas where Plasmodium falciparum malaria is hyperendemic, such as where this study was conducted, neutrophils have reduced expression of adhesion molecules and activation markers during acute stages of the infection, regardless of the clinical type of malaria. This reduced expression could be due to an individual's past exposure to P. falciparum or other parasite-related factors that manifest during active malaria that still need to be investigated.
Collapse
Affiliation(s)
- Wilson Lewis Mandala
- Academy of Medical Sciences, Malawi University of Science and Technology (MUST), Thyolo, Malawi
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
- Basic Sciences Department, College of Medicine, University of Malawi, Blantyre, Malawi
| |
Collapse
|
6
|
Wang F, Ullah A, Fan X, Xu Z, Zong R, Wang X, Chen G. Delivery of nanoparticle antigens to antigen-presenting cells: from extracellular specific targeting to intracellular responsive presentation. J Control Release 2021; 333:107-128. [PMID: 33774119 DOI: 10.1016/j.jconrel.2021.03.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 02/05/2023]
Abstract
An appropriate delivery system can improve the immune effects of antigens against various infections or tumors. Antigen-presenting cells (APCs) are specialized to capture and process antigens in vivo, which link the innate and adaptive immune responses. Functionalization of vaccine delivery systems with targeting moieties to APCs is a promising strategy for provoking potent immune responses. Additionally, the internalization and intracellular distribution of antigens are closely related to the initiation of downstream immune responses. With a deeper understanding of the intracellular microenvironment and the mechanisms of antigen presentation, vehicles designed to respond to endogenous and external stimuli can modulate antigen processing and presentation pathways, which are critical to the types of immune response. Here, an overview of extracellular targeting delivery of antigens to APCs and intracellular stimulus-responsiveness strategies is provided, which might be helpful for the rational design of vaccine delivery systems.
Collapse
Affiliation(s)
- Fei Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Aftab Ullah
- Shantou University Medical College, Shantou 515041, China
| | - Xuelian Fan
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Zhou Xu
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Rongling Zong
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Xuewen Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Gang Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China.
| |
Collapse
|
7
|
Muto S, Ozaki Y, Yamaguchi H, Mine H, Takagi H, Watanabe M, Inoue T, Yamaura T, Fukuhara M, Okabe N, Matsumura Y, Hasegawa T, Osugi J, Hoshino M, Higuchi M, Shio Y, Nanamiya H, Imai JI, Isogai T, Watanabe S, Suzuki H. Tumor β-catenin expression is associated with immune evasion in non-small cell lung cancer with high tumor mutation burden. Oncol Lett 2021; 21:203. [PMID: 33574942 PMCID: PMC7816404 DOI: 10.3892/ol.2021.12464] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 12/17/2020] [Indexed: 12/21/2022] Open
Abstract
β-catenin expression by tumor cells suppressed dendritic cell recruitment to the tumor microenvironment in a melanoma model, resulting in fewer tumor-infiltrating lymphocytes. Immunohistochemistry was used in the present study to examine the association between the expression of β-catenin and tumor infiltrating lymphocytes and CD11c+ cells in 122 patients with non-small cell lung cancer (NSCLC), who underwent radical surgery. β-catenin was positive in 24% of NSCLC tumors compared with 59% of squamous cell carcinomas and 11% of adenocarcinomas. There was no significant association between the expression of β-catenin and the frequency of CD8+ cell infiltration into tumor tissues, including the stroma. Conversely, the infiltration of CD8+ cells into tumor nests was significantly lower in β-catenin-positive cases compared with that in negative β-catenin cases. Similarly, CD11c+ cell infiltration was significantly lower in the β-catenin-positive group. The β-catenin-positive group had shorter overall survival and recurrence-free survival times compared with that in the negative group. Furthermore, β-catenin-positive NSCLC had a high tumor mutation burden, but tended to have a low expression of programmed death-ligand 1. In conclusion, the expression of β-catenin in NSCLC was negatively associated with CD11c+ cells and cytotoxic T cell infiltration at the tumor site and had a tendency towards a poor prognosis.
Collapse
Affiliation(s)
- Satoshi Muto
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Yuki Ozaki
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Hikaru Yamaguchi
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Hayato Mine
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Hironori Takagi
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Masayuki Watanabe
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Takuya Inoue
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Takumi Yamaura
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Mitsuro Fukuhara
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Naoyuki Okabe
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Yuki Matsumura
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Takeo Hasegawa
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Jun Osugi
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Mika Hoshino
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Mitsunori Higuchi
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Yutaka Shio
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Hideaki Nanamiya
- Translational Research Center, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Jun-Ichi Imai
- Translational Research Center, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Takao Isogai
- Translational Research Center, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Shinya Watanabe
- Translational Research Center, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Hiroyuki Suzuki
- Department of Chest Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| |
Collapse
|
8
|
Golinski ML, Demeules M, Derambure C, Riou G, Maho-Vaillant M, Boyer O, Joly P, Calbo S. CD11c + B Cells Are Mainly Memory Cells, Precursors of Antibody Secreting Cells in Healthy Donors. Front Immunol 2020; 11:32. [PMID: 32158442 PMCID: PMC7051942 DOI: 10.3389/fimmu.2020.00032] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 01/08/2020] [Indexed: 12/27/2022] Open
Abstract
CD11c+ B cells have been reported to be increased in autoimmune diseases, but they are detected in the blood of healthy individuals as well. We aimed to characterize CD11c+ B cells from healthy donors by flow cytometry, microarray analysis, and in vitro functional assays. Here, we report that CD11c+ B cells are a distinct subpopulation of B cells, enriched in the memory subpopulation even if their phenotype is heterogeneous, with overexpression of genes involved in B-cell activation and differentiation as well as in antigen presentation. Upon activation, CD11c+ B cells can differentiate into antibody-secreting cells, and CD11c could be upregulated in CD11c- B cells by B-cell receptor activation. Finally, we show that patients with pemphigus, an autoimmune disease mediated by B cells, have a decreased frequency of CD11c+ B cell after treatment, relative to baseline. Our findings show that CD11c+ B cells are mainly memory B cells prone to differentiate into antibody secreting cells that accumulate with age, independently of gender.
Collapse
Affiliation(s)
- Marie-Laure Golinski
- INSERM U1234, Normandy University, Rouen, France
- Department of Dermatology, Rouen University Hospital, Rouen, France
| | | | | | - Gaetan Riou
- INSERM U1234, Normandy University, Rouen, France
| | - Maud Maho-Vaillant
- INSERM U1234, Normandy University, Rouen, France
- Department of Dermatology, Rouen University Hospital, Rouen, France
| | - Olivier Boyer
- INSERM U1234, Normandy University, Rouen, France
- Department of Immunology, Rouen University Hospital, Rouen, France
| | - Pascal Joly
- INSERM U1234, Normandy University, Rouen, France
- Department of Dermatology, Rouen University Hospital, Rouen, France
| | | |
Collapse
|
9
|
Ito Y, Kitakawa M, Koshikawa S, Watanabe H, Sueki H. CD14 and CD16 expression in noninfectious granulomatous skin diseases. JOURNAL OF CUTANEOUS IMMUNOLOGY AND ALLERGY 2020. [DOI: 10.1002/cia2.12091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Yuta Ito
- Department of Dermatology Showa University School of Medicine Tokyo Japan
| | - Maki Kitakawa
- Department of Dermatology Showa University School of Medicine Tokyo Japan
| | - Sachiko Koshikawa
- Department of Dermatology Showa University School of Medicine Tokyo Japan
| | - Hideaki Watanabe
- Department of Dermatology Showa University School of Medicine Tokyo Japan
| | - Hirohiko Sueki
- Department of Dermatology Showa University School of Medicine Tokyo Japan
| |
Collapse
|
10
|
Integrin signaling in atherosclerosis. Cell Mol Life Sci 2017; 74:2263-2282. [PMID: 28246700 DOI: 10.1007/s00018-017-2490-4] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/24/2017] [Accepted: 02/15/2017] [Indexed: 02/07/2023]
Abstract
Atherosclerosis, a chronic lipid-driven inflammatory disease affecting large arteries, represents the primary cause of cardiovascular disease in the world. The local remodeling of the vessel intima during atherosclerosis involves the modulation of vascular cell phenotype, alteration of cell migration and proliferation, and propagation of local extracellular matrix remodeling. All of these responses represent targets of the integrin family of cell adhesion receptors. As such, alterations in integrin signaling affect multiple aspects of atherosclerosis, from the earliest induction of inflammation to the development of advanced fibrotic plaques. Integrin signaling has been shown to regulate endothelial phenotype, facilitate leukocyte homing, affect leukocyte function, and drive smooth muscle fibroproliferative remodeling. In addition, integrin signaling in platelets contributes to the thrombotic complications that typically drive the clinical manifestation of cardiovascular disease. In this review, we examine the current literature on integrin regulation of atherosclerotic plaque development and the suitability of integrins as potential therapeutic targets to limit cardiovascular disease and its complications.
Collapse
|
11
|
Abstract
Integrins comprise a large family of αβ heterodimeric cell adhesion receptors that are expressed on all cells except red blood cells and that play essential roles in the regulation of cell growth and function. The leukocyte integrins, which include members of the β
1, β
2, β
3, and β
7 integrin family, are critical for innate and adaptive immune responses but also can contribute to many inflammatory and autoimmune diseases when dysregulated. This review focuses on the β
2 integrins, the principal integrins expressed on leukocytes. We review their discovery and role in host defense, the structural basis for their ligand recognition and activation, and their potential as therapeutic targets.
Collapse
Affiliation(s)
- M Amin Arnaout
- Leukocyte Biology & Inflammation Program, Structural Biology Program, Nephrology, Center for Regenerative Medicine, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| |
Collapse
|
12
|
Uotila LM, Aatonen M, Gahmberg CG. Integrin CD11c/CD18 α-chain phosphorylation is functionally important. J Biol Chem 2013; 288:33494-9. [PMID: 24129562 DOI: 10.1074/jbc.c113.497446] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
CD11c/CD18 (αXβ2, p150/95, or complement receptor 4, CR4) is a monocyte/macrophage-enriched integrin that has been reported to bind to a variety of ligands. These include cell surface proteins, extracellular matrix proteins, and soluble ligands. The regulation of ligand binding to CD11c/CD18 has remained poorly understood. Previous work has shown that both α-chain and β-chain phosphorylations of CD11a/CD18 and CD11b/CD18 are needed for activity, but no corresponding studies on CD11c/CD18 have been performed. In this study, we have identified the phosphorylation site of CD11c as Ser-1158 and show that it is pivotal for adherence and phagocytosis.
Collapse
Affiliation(s)
- Liisa M Uotila
- From the Division of Biochemistry and Biotechnology, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | | | | |
Collapse
|
13
|
The leucocyte β2 (CD18) integrins: the structure, functional regulation and signalling properties. Biosci Rep 2012; 32:241-69. [PMID: 22458844 DOI: 10.1042/bsr20110101] [Citation(s) in RCA: 124] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Leucocytes are highly motile cells. Their ability to migrate into tissues and organs is dependent on cell adhesion molecules. The integrins are a family of heterodimeric transmembrane cell adhesion molecules that are also signalling receptors. They are involved in many biological processes, including the development of metazoans, immunity, haemostasis, wound healing and cell survival, proliferation and differentiation. The leucocyte-restricted β2 integrins comprise four members, namely αLβ2, αMβ2, αXβ2 and αDβ2, which are required for a functional immune system. In this paper, the structure, functional regulation and signalling properties of these integrins are reviewed.
Collapse
|
14
|
Owens RM, Gu X, Shin M, Springer TA, Jin MM. Engineering of single Ig superfamily domain of intercellular adhesion molecule 1 (ICAM-1) for native fold and function. J Biol Chem 2010; 285:15906-15. [PMID: 20304924 PMCID: PMC2871458 DOI: 10.1074/jbc.m110.104349] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Revised: 03/11/2010] [Indexed: 11/06/2022] Open
Abstract
The immunoglobulin (Ig) superfamily is one of the largest families in the vertebrate genome, found most frequently in cell surface molecules. Intercellular adhesion molecule-1 (ICAM-1) contains five extracellular Ig superfamily domains (D1-D5) of which the first domain, D1, is the binding site for the integrin lymphocyte function-associated antigen-1 (LFA-1) and human rhinovirus. Despite the modular nature of many Ig superfamily domains with respect to domain folding and ligand recognition, D1 does not fold on its own due to the loss of its interaction with the second domain. The goal of this study was to engineer ICAM-1 D1 by introducing mutations that would stabilize the Ig superfamily domain fold while retaining its ability to bind to LFA-1 and rhinovirus. First, with a directed evolution approach, we isolated mutations in D1 that showed binding to conformation-specific antibodies and the ligand binding domain of LFA-1 called the inserted, or I, domain. Then, with a rational design approach we introduced mutations that contributed to the stability of ICAM-1 D1 in solution. The mutations that restored native folding of D1 in isolation were those that would convert hydrogen bond networks in buried regions into hydrophobic contacts. Notably, for most mutations, identical or similar types of substitutions were found in ICAM-1 molecules of different species and other ICAM family members. The systematic approach demonstrated in this study to engineer a single Ig superfamily fold in ICAM-1 can be broadly applicable to the engineering of modular Ig superfamily domains in other cell surface molecules.
Collapse
Affiliation(s)
- Róisín M. Owens
- From the Department of Biomedical Engineering, Cornell University, Ithaca, New York 14853 and
| | - Xiaoling Gu
- From the Department of Biomedical Engineering, Cornell University, Ithaca, New York 14853 and
| | - Miran Shin
- From the Department of Biomedical Engineering, Cornell University, Ithaca, New York 14853 and
| | - Timothy A. Springer
- the Immune Disease Institute, Harvard Medical School, Boston, Massachusetts 02115
| | - Moonsoo M. Jin
- From the Department of Biomedical Engineering, Cornell University, Ithaca, New York 14853 and
- the Immune Disease Institute, Harvard Medical School, Boston, Massachusetts 02115
| |
Collapse
|
15
|
Sadhu C, Ting HJ, Lipsky B, Hensley K, Garcia-Martinez LF, Simon SI, Staunton DE. CD11c/CD18: novel ligands and a role in delayed-type hypersensitivity. J Leukoc Biol 2007; 81:1395-403. [PMID: 17389580 DOI: 10.1189/jlb.1106680] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
CD11c, a member of the leukointegrin family, is expressed prominently on tissue macrophages and dendritic cells and binds to complement fragment (iC3b), provisional matrix molecules (fibrinogen), and the Ig superfamily cell adhesion molecule, ICAM-1. CD11c has been proposed to function in phagocytosis, cell migration, and cytokine production by monocytes/macrophages as well as induction of T cell proliferation by Langerhans cells. Using assays to quantify CD11c-mediated cell adhesion, we demonstrate that CD11c recognizes ICAM-2 and VCAM-1. The CD11c-binding site on VCAM-1 appears to be different from that used by the integrin alpha4. CD11c and alpha4beta1 contributed to monocyte capture and transmigration on inflamed human aortic endothelial cells. We discovered that the anti-mouse CD11c mAb N418 blocks CD11c binding to iC3b, ICAM-1, and VCAM-1. Treatment of mice with N418 reduced SRBC-induced delayed-type hypersensitivity significantly. CD11c appeared to contribute predominantly to the sensitization phase and somewhat less to the response to SRBC challenge. This suggests a novel role for CD11c during leukocyte recruitment, antigen uptake, and the survival of APC.
Collapse
Affiliation(s)
- Chanchal Sadhu
- ICOS Corporation, 22021 20th Ave., S.E., Bothell, WA 98021, USA.
| | | | | | | | | | | | | |
Collapse
|
16
|
Shimazawa M, Watanabe S, Kondo K, Hara H, Nakashima M, Umemura K. Neutrophil accumulation promotes intimal hyperplasia after photochemically induced arterial injury in mice. Eur J Pharmacol 2005; 520:156-63. [PMID: 16140293 DOI: 10.1016/j.ejphar.2005.07.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2005] [Accepted: 07/01/2005] [Indexed: 11/17/2022]
Abstract
The role of leukocytes in the pathogenesis of coronary arterial disease has become a focus for clinical research. The aim of this study was to determine whether neutrophil accumulation would participate in the development of intimal hyperplasia after endothelial injury in mice, and whether d-myo-inositol hexakisphosphate (phytic acid) which inhibits the binding of L- and P-selectin to sialyl Lewis(X) could inhibit the development of intimal hyperplasia. Endothelial injury was inflicted in one femoral artery via the photochemical reaction between systemically injected rose bengal and transillumination with green light (wavelength: 540 nm). Scanning electron microscopic observation at 3 days after the injury showed an increase in the number of leukocytes adhering to the injury site. Histological observation at 21 days showed that in the neutropenia group administered anti-neutrophil antibody and in the phytic acid-treated group the progression of intimal hyperplasia was significantly attenuated by comparison with the corresponding control groups. These results suggest that neutrophil accumulation contributes to the initiation and/or development of intimal hyperplasia and L- and/or P-selectin may participate in their mechanisms.
Collapse
Affiliation(s)
- Masamitsu Shimazawa
- Department of Pharmacology, Hamamatsu University School of Medicine, 3600, Handa-cho, Hamamatsu 431-3124, Japan.
| | | | | | | | | | | |
Collapse
|
17
|
DesJardin LE, Kaufman TM, Potts B, Kutzbach B, Yi H, Schlesinger LS. Mycobacterium tuberculosis-infected human macrophages exhibit enhanced cellular adhesion with increased expression of LFA-1 and ICAM-1 and reduced expression and/or function of complement receptors, FcgammaRII and the mannose receptor. MICROBIOLOGY (READING, ENGLAND) 2002; 148:3161-3171. [PMID: 12368450 DOI: 10.1099/00221287-148-10-3161] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The entry of Mycobacterium tuberculosis (Mtb) into the host macrophage and its survival in this environment are key components of tuberculosis pathogenesis. Following intracellular replication of the bacterium within alveolar macrophages, there is spread of bacilli to regional lymph nodes in the lungs and subsequent presentation of antigens to the host immune system. How this process occurs remains poorly understood, but one mechanism may involve the migration of macrophages containing Mtb across the alveoli to lymph nodes, where there is development of a protective host response with formation of granulomas composed in part of aggregated and fused, apoptotic, infected macrophages. Leukocyte integrins, including lymphocyte function-associated antigen-1 (LFA-1) and complement receptors CR3 and CR4, and their counter receptors play a major role in macrophage adhesion processes and phagocytosis. In this study, the appearance of Mtb-infected macrophages over time was examined, using inverted-phase microscopy and an in vitro culture model of human monocyte-derived macrophages (MDMs). Prior to and immediately following infection of the MDMs with Mtb, the macrophages appeared as individual cells in monolayer culture; however, within 24 h of infection with Mtb, the MDMs began to migrate and adhere to each other. The kinetics of this response were dependent on both the m.o.i. and the length of infection. Quantitative transmission electron microscopy studies revealed that macrophage adhesion was accompanied by increases in levels of LFA-1 and its counter receptor (ICAM-1), decreases in surface levels of the phagocytic receptors CR3, CR4 and FcgammaRII, and an increase in major histocompatibility complex Class II (MHC-II) molecules at 72 h post-infection. Decreases in surface levels of CR3 and CR4 had a functional correlate, with macrophages containing live bacilli showing a diminished phagocytic capacity for complement-opsonized sheep erythrocytes; macrophages containing heat-killed bacilli did not show this diminished capacity. The modulation of macrophage adhesion and phagocytic proteins may influence the trafficking of Mtb-infected macrophages within the host, with increases in levels of LFA-1 and ICAM-1 enhancing the adhesive properties of the macrophage and decreases in phagocytic receptors diminishing the phagocytic capacity of an already-infected cell, potentially allowing for maintenance of the intracellular niche of Mtb.
Collapse
Affiliation(s)
- Lucy E DesJardin
- Veterans Admin. Med. Center1 and Depts of Medicine2, Microbiology3 and the Interdisciplinary Immunology Program4, University of Iowa, Iowa City, IA, USA
| | - Thomas M Kaufman
- Veterans Admin. Med. Center1 and Depts of Medicine2, Microbiology3 and the Interdisciplinary Immunology Program4, University of Iowa, Iowa City, IA, USA
| | - Brian Potts
- Veterans Admin. Med. Center1 and Depts of Medicine2, Microbiology3 and the Interdisciplinary Immunology Program4, University of Iowa, Iowa City, IA, USA
| | - Beth Kutzbach
- Veterans Admin. Med. Center1 and Depts of Medicine2, Microbiology3 and the Interdisciplinary Immunology Program4, University of Iowa, Iowa City, IA, USA
| | - Hong Yi
- Veterans Admin. Med. Center1 and Depts of Medicine2, Microbiology3 and the Interdisciplinary Immunology Program4, University of Iowa, Iowa City, IA, USA
| | - Larry S Schlesinger
- Veterans Admin. Med. Center1 and Depts of Medicine2, Microbiology3 and the Interdisciplinary Immunology Program4, University of Iowa, Iowa City, IA, USA
| |
Collapse
|
18
|
Lima M, Teixeira MA, Queirós ML, Leite M, Santos AH, Justiça B, Orfão A. Immunophenotypic characterization of normal blood CD56+lo versus CD56+hi NK-cell subsets and its impact on the understanding of their tissue distribution and functional properties. Blood Cells Mol Dis 2001; 27:731-43. [PMID: 11778657 DOI: 10.1006/bcmd.2001.0443] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study we have compared the immunophenotypic characteristics of the CD56+lo and CD56+hi NK-cell subsets in a group of normal healthy adults. Our results show that CD56+hi NK-cells display greater light-scatter properties than CD56+lo NK-cells at the same time they have higher levels of CD25 and CD122 IL-2 chains, together with a higher reactivity for HLA-DR and CD45RO and lower levels of CD45RA, supporting that, as opposed to the majority of the CD56+lo population, CD56+hi NK-cells might correspond to a subset of activated circulating NK-lymphocytes. Higher expression of the CD2 and CD7 costimulatory molecules found for the CD56+hi NK-cells would support their greater ability to respond to various stimuli. In addition, CD56+hi NK-cells expressed higher levels of several adhesion molecules such as CD2, CD11c, CD44, CD56, and CD62L compared to CD56+lo NK-cells, supporting a particular ability of these cells to migrate from blood to tissues and/or a potential advantage to form conjugates with target cells. Interestingly, CD56+lo and CD56+hi NK-cells showed a different pattern of expression of killer receptors that might determine different activation requirements for each of these NK-cell subsets. For instance, absence or low levels of CD16 expression might explain the lower antibody-dependent cytotoxicity activity of CD56+hi NK-cells. On the other hand, the virtual absence of expression of the CD158a and NKB1 immunoglobulin-like and the greater reactivity for the CD94 lectin-like killer receptors on CD56+hi in comparison to CD56+lo NK-cells might determine different MHC-class I specificities for both NK-cell subsets, a possibility that deserves further studies to be confirmed.
Collapse
MESH Headings
- Adult
- Antigens, CD/analysis
- Antigens, Differentiation/analysis
- Antigens, Differentiation, T-Lymphocyte/analysis
- CD56 Antigen/analysis
- Cell Adhesion Molecules/analysis
- Cell Differentiation
- Female
- Humans
- Immunophenotyping
- Killer Cells, Natural/chemistry
- Killer Cells, Natural/classification
- Killer Cells, Natural/immunology
- Leukocyte Common Antigens/analysis
- Lymphocyte Activation
- Male
- Receptors, Immunologic/analysis
- Receptors, KIR
- Receptors, KIR2DL1
- Receptors, KIR3DL1
- Receptors, Lymphocyte Homing/analysis
Collapse
Affiliation(s)
- M Lima
- Service of Clinical Hematology, Unit of Cytometry, Hospital Geral de Santo António, Porto, Portugal.
| | | | | | | | | | | | | |
Collapse
|
19
|
Affiliation(s)
- S Adler
- Department of Medicine, New York Medical College, Valhalla, USA
| | | |
Collapse
|
20
|
Chen T, Goldstein JS, O'Boyle K, Whitman MC, Brunswick M, Kozlowski S. ICAM-1 co-stimulation has differential effects on the activation of CD4+ and CD8+ T cells. Eur J Immunol 1999; 29:809-14. [PMID: 10092083 DOI: 10.1002/(sici)1521-4141(199903)29:03<809::aid-immu809>3.0.co;2-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
T cells play a central role in the initiation, maintenance and regulation of the immune response. Effector responses of T cells are controlled by complex combinations of lymphokines and adhesion/co-stimulatory molecule signals. To isolate the effects of the adhesion/co-stimulatory molecule ICAM-1, we have stimulated purified murine CD4+ and CD8+ T cells with plate-bound anti-CD3 in the presence or absence of plate-bound soluble ICAM-1. In this report, we demonstrate that the co-immobilization of soluble ICAM-1 and anti-CD3 leads to a much greater increase in IL-2 production by CD8+ T cells than CD4+ T cells. The ICAM-1-induced enhancement we observed has differential sensitivity to LFA-1 blockade, depending on the T cell subsets and cytokine evaluated. These effects may play an important role in the generation and modulation of immune responses.
Collapse
Affiliation(s)
- T Chen
- Division of Monoclonal Antibodies, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda 20892, USA
| | | | | | | | | | | |
Collapse
|
21
|
Marx N, Neumann FJ, Zohlnhöfer D, Dickfeld T, Fischer A, Heimerl S, Schömig A. Enhancement of monocyte procoagulant activity by adhesion on vascular smooth muscle cells and intercellular adhesion molecule-1-transfected Chinese hamster ovary cells. Circulation 1998; 98:906-11. [PMID: 9738646 DOI: 10.1161/01.cir.98.9.906] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Plaque erosion is a frequent finding in sudden death due to coronary thrombosis. The present study sought to investigate whether monocyte adhesion to human aortic vascular smooth muscle cells (VSMCs) induces procoagulant activity (PCA) and whether this could be mediated by intercellular adhesion molecule-1 (ICAM-1). METHODS AND RESULTS We incubated mononuclear cells (MNCs) with VSMCs and ICAM-1-transfected Chinese hamster ovary (CHO) cells, investigated monocyte tissue factor (TF) mRNA expression by Northern blot analysis and TF protein expression by ELISA, and measured PCA. Incubation of MNCs with VSMCs for 6 hours increased PCA from 0.7+/-0.1 to 166.0+/-37.9 mU/105 cells (P=0.007), which could be inhibited in a dose-dependent manner by the addition of blocking anti-ICAM-1 monoclonal antibodies. Prestimulation of VSMCs with interleukin-1beta enhanced surface ICAM-1 expression significantly but did not induce PCA in VSMCs. Incubation of MNCs with prestimulated VSMCs led to a further increase in PCA to 239.9+/-27.9 mU/10(5) cells (P=0.02 compared with incubation with unstimulated VSMCs). Incubation of MNCs with VSMCs enhanced TF mRNA after 2 hours and significantly increased TF protein content after 6 hours. Incubation of purified monocytes with ICAM-1-transfected CHO cells increased PCA from 1.2+/-0.2 to 81.9+/-3.3 mU/10(5) cells (P<0.001 compared with incubation with untransfected CHO cells) after 6 hours. This effect could be inhibited significantly by the addition of blocking anti-CD18, anti-CD11b, or anti-CD11c monoclonal antibodies. Similar results were obtained for MNCs. CONCLUSIONS Monocyte adhesion to VSMCs induces TF mRNA and protein expression and monocyte PCA, which is regulated by beta2-integrin-mediated monocyte adhesion to ICAM-1 on VSMCs.
Collapse
Affiliation(s)
- N Marx
- 1. Medizinische Klinik und Deutsches Herzzentrum, Technische Universität München, Germany
| | | | | | | | | | | | | |
Collapse
|
22
|
Schwarzer E, Alessio M, Ulliers D, Arese P. Phagocytosis of the malarial pigment, hemozoin, impairs expression of major histocompatibility complex class II antigen, CD54, and CD11c in human monocytes. Infect Immun 1998; 66:1601-6. [PMID: 9529087 PMCID: PMC108094 DOI: 10.1128/iai.66.4.1601-1606.1998] [Citation(s) in RCA: 125] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/1997] [Accepted: 01/16/1998] [Indexed: 02/07/2023] Open
Abstract
In Plasmodium falciparum malaria, large proportions of resident macrophages and circulating monocytes and leukocytes contain massive amounts of the malarial pigment, hemozoin. Previous studies have shown that important functions (e.g., the generation of the oxidative burst, the ability to repeat phagocytosis, and protein kinase C activity) were severely impaired in hemozoin-loaded monocytes. Expression of membrane antigens directly involved in the immune response and in the phagocytic process, and/or under protein kinase C control, in hemozoin-loaded human monocytes was studied. Expression of major histocompatibility complex (MHC) class II after gamma interferon stimulation was blocked in hemozoin-loaded monocytes at the protein expression and gene transcription levels but was preserved in control monocytes loaded with opsonized latex beads or anti-D(Rho)-immunoglobulin G (IgG)-opsonized human erythrocytes. Expression of CD54 (intracellular adhesion molecule 1) and CD11c (p150,95 integrin) was also decreased in hemozoin-loaded monocytes. Expression of MHC class I, CD16 (low-affinity Fc receptor for aggregated IgG), CD32 (low-affinity Fc receptor for aggregated IgG), CD64 (high-affinity receptor for IgG), CD11b (receptor for complement component iC3b [CR3]), CD35 (receptor for complement components C3b and C4b [CR1]), and CD36 (non-class-A scavenger receptor) was not specifically affected by hemozoin loading. These results suggest that hemozoin loading may contribute to the impairment of the immune response and the derangement of antigen presentation reported in previous studies of P. falciparum malaria.
Collapse
Affiliation(s)
- E Schwarzer
- Department of Genetics, Biology and Biochemistry, University of Turin Medical School, Italy
| | | | | | | |
Collapse
|
23
|
López-Rodríguez C, Botella L, Corbí AL. CCAAT-enhancer-binding proteins (C/EBP) regulate the tissue specific activity of the CD11c integrin gene promoter through functional interactions with Sp1 proteins. J Biol Chem 1997; 272:29120-6. [PMID: 9360988 DOI: 10.1074/jbc.272.46.29120] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The CD11c/CD18 integrin binds lipopolysaccharide, fibrinogen, and heparin, and mediates leukocyte adhesion, spreading, and migration. CD11c/CD18 is primarily found on myeloid cells and its expression is regulated during myeloid differentiation by transcriptional mechanisms acting on the CD11c gene promoter. We now describe that CCAAT/enhancer-binding proteins (C/EBP) contribute to the basal, tissue-specific and developmentally regulated activity of the CD11c promoter. A C/EBP-binding site within the CD11c promoter (CEBP-80) is bound by CEBPalpha in undifferentiated U937 cells and by C/EBPalpha- and C/EBPbeta-containing dimers in phorbol 12-myristate 13-acetate-differentiating cells, and its disruption decreased the CD11c promoter activity in a cell type-dependent manner. C/EBPalpha transactivated the CD11c promoter through the CEBP-80 element, and C/EBPalpha transactivation was also dependent on the Sp1-70- and Sp1-120 Sp1-binding sites. The -90/-50 fragment from the CD11c promoter, containing the adjacent CEBP-80, Sp1-70, and AP1-60 sites, differentially enhanced the activity of the minimal prolactin promoter in hematopoietic and epithelial cells. Altogether, these results demonstrate that C/EBP factors participate in the tissue-restricted and regulated expression of the CD11c/CD18 integrin through functional interactions with Sp1, suggest that Sp1-related factors modulate C/EBPalpha transcriptional activity on the CD11c promoter, and demonstrate the existence of a composite regulatory element recognized by C/EBP, Sp1, and AP-1 factors and whose enhancing effects are cell-type dependent.
Collapse
|
24
|
Gahmberg CG, Tolvanen M, Kotovuori P. Leukocyte adhesion--structure and function of human leukocyte beta2-integrins and their cellular ligands. EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 245:215-32. [PMID: 9151947 DOI: 10.1111/j.1432-1033.1997.00215.x] [Citation(s) in RCA: 167] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Leukocyte adhesion is of pivotal functional importance and this has resulted in extensive research and rapid development in the field. Leukocyte adhesion involves members of three molecular families: integrins, members of the immunoglobulin superfamily and carbohydrate binding selectins and sialoadhesins. Recently, considerable structural information on leukocyte integrins and members of the immunoglobulin superfamily of adhesion molecules has been obtained. This fact, combined with the identification of several novel adhesion molecules, has increased our understanding of how they function at the molecular level. Furthermore, the important issue of how integrins are activated to become adhesive is rapidly advancing. It is clearly evident that the knowledge accumulated from basic research will increasingly be applied in clinical medicine. In this review we focus on two important families of adhesion molecules, the leukocyte-specific beta2-integrins and their ligands, the intercellular adhesion molecules. Emphasis is put on their structural/functional relationships, their mode of regulation and on novel adhesion molecules recently discovered.
Collapse
Affiliation(s)
- C G Gahmberg
- Department of Biosciences, University of Helsinki, Finland
| | | | | |
Collapse
|
25
|
Huleatt JW, Lefrançois L. Beta2 integrins and ICAM-1 are involved in establishment of the intestinal mucosal T cell compartment. Immunity 1996; 5:263-73. [PMID: 8808681 DOI: 10.1016/s1074-7613(00)80321-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Development of the mucosal immune system was examined in mice with partial loss of expression of ICAM-1 or CD18. Profound effects on Peyer's patch (PP), lamina propria (LP), and intraepithelial lymphocyte (IEL) T cell populations were observed in mutant mice. Normal expression of CD18 integrins and ICAM-1 was essential for development of the CD8(alpha beta) TCR(alpha beta)LP and IEL compartment and for the generation of normal PP lymphocyte populations. The partial loss of CD8(alpha beta) IEL correlated with the loss of TCR(alpha beta) IEL-mediated lytic activity. The presence of a subset of Thy1+TCR(gamma delta)IEL was also dependent on CD18 integrins and ICAM-1. Both the lytic activity and the expression of CD11c by TCR(gamma delta)IEL were up-regulated in the presence of TCR(alpha beta) T cells. Analysis of bone marrow chimeras demonstrated that a bone marrow-derived ICAM-1+ accessory cell was involved in the generation of some TCR(alpha beta) IEL. These results demonstrated that ICAM-1 and beta2 integrins were required for establishment of a normal intestinal immune system.
Collapse
Affiliation(s)
- J W Huleatt
- Division of Rheumatic Diseases, University of Connecticut Health Center, Farmington 06030, USA
| | | |
Collapse
|