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Sarabia-Sánchez MA, Tinajero-Rodríguez JM, Ortiz-Sánchez E, Alvarado-Ortiz E. Cancer Stem Cell markers: Symphonic masters of chemoresistance and immune evasion. Life Sci 2024; 355:123015. [PMID: 39182567 DOI: 10.1016/j.lfs.2024.123015] [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: 04/21/2024] [Revised: 08/21/2024] [Accepted: 08/22/2024] [Indexed: 08/27/2024]
Abstract
Cancer Stem Cells (CSCs) are highly tumorigenic, chemoresistant, and immune evasive. They emerge as a central driver that gives rise to the bulk of tumoral mass, modifies the tumor microenvironment (TME), and exploits it, leading to poor clinical outcomes for patients with cancer. The existence of CSCs thus accounts for the failure of conventional therapies and immune surveillance. Identifying CSCs in solid tumors remains a significant challenge in modern oncology, with the use of cell surface markers being the primary strategy for studying, isolating, and enriching these cells. In this review, we explore CSC markers, focusing on the underlying signaling pathways that drive CSC self-renewal, which simultaneously makes them intrinsically chemoresistant and immune system evaders. We comprehensively discuss the autonomous and non-autonomous functions of CSCs, with particular emphasis on their interactions with the tumor microenvironment, especially immune cells. This reciprocal network enhances CSCs malignancy while compromising the surrounding niche, ultimately defining therapeutic vulnerabilities associated with each CSC marker. The most common CSCs surface markers addressed in this review-CD44, CD133, ICAM1/CD54, and LGR5-provide insights into the interplay between chemoresistance and immune evasion, two critically important phenomena in disease eradication. This new perspective on the state-of-the-art of CSCs will undoubtedly open new avenues for therapy.
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Affiliation(s)
- Miguel Angel Sarabia-Sánchez
- Subdirección de Investigación Básica, Instituto Nacional de Cancerología, Secretaría de Salud, Ciudad de México, México; Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, México
| | - José Manuel Tinajero-Rodríguez
- Subdirección de Investigación Básica, Instituto Nacional de Cancerología, Secretaría de Salud, Ciudad de México, México; Tecnológico Nacional de México, Tecnológico de Estudios Superiores de Huixquilucan, México
| | - Elizabeth Ortiz-Sánchez
- Subdirección de Investigación Básica, Instituto Nacional de Cancerología, Secretaría de Salud, Ciudad de México, México
| | - Eduardo Alvarado-Ortiz
- Programa de Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, México; Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, México.
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2
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Chen M, Fu Z, Wu C. Tumor-derived exosomal ICAM1 promotes bone metastasis of triple-negative breast cancer by inducing CD8+ T cell exhaustion. Int J Biochem Cell Biol 2024; 175:106637. [PMID: 39147124 DOI: 10.1016/j.biocel.2024.106637] [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: 04/30/2024] [Revised: 08/07/2024] [Accepted: 08/12/2024] [Indexed: 08/17/2024]
Abstract
Exosomes, which are nanosized extracellular vesicles, have emerged as crucial mediators of the crosstalk between tumor cells and the immune system. Intercellular adhesion molecule 1 (ICAM1) plays a crucial role in multiple immune functions as well as in the occurrence, development and metastasis of cancer. As a glycoprotein expressed on the cell membrane, ICAM1 is secreted extracellularly on exosomes and regulates the immunosuppressive microenvironment. However, the role of exosomal ICAM1 in the immune microenvironment of breast cancer bone metastases remains unclear. This study aimed to elucidated the role of exosomal ICAM1 in facilitating CD8+ T cell exhaustion and subsequent bone metastasis in triple-negative breast cancer (TNBC). We demonstrated that TNBC cells release ICAM1-enriched exosomes, and the binding of ICAM1 to its receptor is necessary for the suppressive effect of CD8 T cell proliferation and function. This pivotal engagement not only inhibits CD8+ T cell proliferation and activation but also initiates the development of an immunosuppressive microenvironment that is conducive to TNBC tumor growth and bone metastasis. Moreover, ICAM1 blockade significantly impairs the ability of tumor exosomes to bind to CD8+ T cells, thereby inhibiting their immunosuppressive effects. The present study elucidates the complex interaction between primary tumors and the immune system that is mediated by exosomes and provides a foundation for the development of novel cancer immunotherapies that target ICAM1 with the aim of mitigating TNBC bone metastasis.
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Affiliation(s)
- Mingcang Chen
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China; Metabolic Disease Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Zhengwei Fu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China.
| | - Chunyu Wu
- Department of Breast Surgery (Integrated Traditional and Western Medicine), Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
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3
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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.
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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.)
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4
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Klaus T, Wilson A, Fichter M, Bros M, Bopp T, Grabbe S. The Role of LFA-1 for the Differentiation and Function of Regulatory T Cells-Lessons Learned from Different Transgenic Mouse Models. Int J Mol Sci 2023; 24:6331. [PMID: 37047302 PMCID: PMC10094578 DOI: 10.3390/ijms24076331] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
Regulatory T cells (Treg) are essential for the maintenance of peripheral tolerance. Treg dysfunction results in diverse inflammatory and autoimmune diseases with life-threatening consequences. β2-integrins (CD11a-d/CD18) play important roles in the migration of leukocytes into inflamed tissues and cell signaling. Of all β2-integrins, T cells, including Treg, only express CD11a/CD18, termed lymphocyte function-associated antigen 1 (LFA-1), on their surface. In humans, loss-of-function mutations in the common subunit CD18 result in leukocyte adhesion deficiency type-1 (LAD-1). Clinical symptoms vary depending on the extent of residual β2-integrin function, and patients may experience leukocytosis and recurrent infections. Some patients can develop autoimmune diseases, but the immune processes underlying the paradoxical situation of immune deficiency and autoimmunity have been scarcely investigated. To understand this complex phenotype, different transgenic mouse strains with a constitutive knockout of β2-integrins have been established. However, since a constitutive knockout affects all leukocytes and may limit the validity of studies focusing on their cell type-specific role, we established a Treg-specific CD18-floxed mouse strain. This mini-review aims to delineate the role of LFA-1 for the induction, maintenance, and regulatory function of Treg in vitro and in vivo as deduced from observations using the various β2-integrin-deficient mouse models.
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Affiliation(s)
- Tanja Klaus
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Alicia Wilson
- Institute for Immunology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Michael Fichter
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Matthias Bros
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Tobias Bopp
- Institute for Immunology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Stephan Grabbe
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany
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Discrete tissue microenvironments instruct diversity in resident memory T cell function and plasticity. Nat Immunol 2021; 22:1140-1151. [PMID: 34426691 DOI: 10.1038/s41590-021-01004-1] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 07/15/2021] [Indexed: 12/23/2022]
Abstract
Tissue-resident memory T (TRM) cells are non-recirculating cells that exist throughout the body. Although TRM cells in various organs rely on common transcriptional networks to establish tissue residency, location-specific factors adapt these cells to their tissue of lodgment. Here we analyze TRM cell heterogeneity between organs and find that the different environments in which these cells differentiate dictate TRM cell function, durability and malleability. We find that unequal responsiveness to TGFβ is a major driver of this diversity. Notably, dampened TGFβ signaling results in CD103- TRM cells with increased proliferative potential, enhanced function and reduced longevity compared with their TGFβ-responsive CD103+ TRM counterparts. Furthermore, whereas CD103- TRM cells readily modified their phenotype upon relocation, CD103+ TRM cells were comparatively resistant to transdifferentiation. Thus, despite common requirements for TRM cell development, tissue adaptation of these cells confers discrete functional properties such that TRM cells exist along a spectrum of differentiation potential that is governed by their local tissue microenvironment.
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Gérard A, Cope AP, Kemper C, Alon R, Köchl R. LFA-1 in T cell priming, differentiation, and effector functions. Trends Immunol 2021; 42:706-722. [PMID: 34266767 PMCID: PMC10734378 DOI: 10.1016/j.it.2021.06.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/11/2021] [Accepted: 06/13/2021] [Indexed: 12/19/2022]
Abstract
The integrin LFA-1 is crucial for T cell entry into mammalian lymph nodes and tissues, and for promoting interactions with antigen-presenting cells (APCs). However, it is increasingly evident that LFA-1 has additional key roles beyond the mere support of adhesion between T cells, the endothelium, and/or APCs. These include roles in homotypic T cell-T cell (T-T) communication, the induction of intracellular complement activity underlying Th1 effector cell polarization, and the support of long-lasting T cell memory. Here, we briefly summarize current knowledge of LFA-1 biology, discuss novel cytoskeletal regulators of LFA-1 functions, and review new aspects of LFA-1 mechanobiology that are relevant to its function in immunological synapses and in specific pathologies arising from LFA-1 dysregulation.
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Affiliation(s)
- Audrey Gérard
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Andrew P Cope
- Centre for Inflammation Biology and Cancer Immunology, King's College London, London, UK
| | - Claudia Kemper
- National Heart, Lung and Blood Institute (NHLBI), National Institute of Health (NIH), Complement and Inflammation Research Section (CIRS), Bethesda, MD, USA; Institute for Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
| | - Ronen Alon
- The Weizmann Institute of Science, Rehovot, Israel
| | - Robert Köchl
- Peter Gorer Department of Immunobiology, King's College London, London, UK.
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FitzPatrick MEB, Provine NM, Garner LC, Powell K, Amini A, Irwin SL, Ferry H, Ambrose T, Friend P, Vrakas G, Reddy S, Soilleux E, Klenerman P, Allan PJ. Human intestinal tissue-resident memory T cells comprise transcriptionally and functionally distinct subsets. Cell Rep 2021; 34:108661. [PMID: 33472060 PMCID: PMC7816164 DOI: 10.1016/j.celrep.2020.108661] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 10/14/2020] [Accepted: 12/22/2020] [Indexed: 01/07/2023] Open
Abstract
Tissue-resident memory T (TRM) cells provide key adaptive immune responses in infection, cancer, and autoimmunity. However, transcriptional heterogeneity of human intestinal TRM cells remains undefined. Here, we investigate transcriptional and functional heterogeneity of human TRM cells through study of donor-derived TRM cells from intestinal transplant recipients. Single-cell transcriptional profiling identifies two transcriptional states of CD8+ TRM cells, delineated by ITGAE and ITGB2 expression. We define a transcriptional signature discriminating these populations, including differential expression of cytotoxicity- and residency-associated genes. Flow cytometry of recipient-derived cells infiltrating the graft, and lymphocytes from healthy gut, confirm these CD8+ TRM phenotypes. CD8+ CD69+CD103+ TRM cells produce interleukin-2 (IL-2) and demonstrate greater polyfunctional cytokine production, whereas β2-integrin+CD69+CD103− TRM cells have higher granzyme expression. Analysis of intestinal CD4+ T cells identifies several parallels, including a β2-integrin+ population. Together, these results describe the transcriptional, phenotypic, and functional heterogeneity of human intestinal CD4+ and CD8+ TRM cells. Human intestinal transplants were used to identify bona fide TRM cells Single-cell RNA sequencing identifies two distinct CD8+ TRM subsets CD103+CD69+ and CD103−CD69+ TRM cell subsets show distinct localization and function β2-integrin is highly expressed on CD103− TRM cells
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Affiliation(s)
- Michael E B FitzPatrick
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Nicholas M Provine
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Lucy C Garner
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Kate Powell
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, UK
| | - Ali Amini
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Sophie L Irwin
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Helen Ferry
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Tim Ambrose
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Peter Friend
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford OX3 9DU, UK; Oxford Transplant Centre, Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 7LE, UK
| | - Georgios Vrakas
- Oxford Transplant Centre, Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 7LE, UK
| | - Srikanth Reddy
- Oxford Transplant Centre, Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 7LE, UK
| | - Elizabeth Soilleux
- Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK
| | - Paul Klenerman
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK; Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, UK; NIHR Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK.
| | - Philip J Allan
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DU, UK; Oxford Transplant Centre, Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 7LE, UK; NIHR Biomedical Research Centre, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK
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8
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Merle NS, Singh P, Rahman J, Kemper C. Integrins meet complement: The evolutionary tip of an iceberg orchestrating metabolism and immunity. Br J Pharmacol 2020; 178:2754-2770. [PMID: 32562277 PMCID: PMC8359198 DOI: 10.1111/bph.15168] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 12/18/2022] Open
Abstract
Immunologists have recently realized that there is more to the classic innate immune sensor systems than just mere protection against invading pathogens. It is becoming increasingly clear that such sensors, including the inflammasomes, toll-like receptors, and the complement system, are heavily involved in the regulation of basic cell physiological processes and particularly those of metabolic nature. In fact, their "non-canonical" activities make sense as no system directing immune cell activity can perform such task without the need for energy. Further, many of these ancient immune sensors appeared early and concurrently during evolution, particularly during the developmental leap from the single-cell organisms to multicellularity, and therefore crosstalk heavily with each other. Here, we will review the current knowledge about the emerging cooperation between the major inter-cell communicators, integrins, and the cell-autonomous intracellularly and autocrine-active complement, the complosome, during the regulation of single-cell metabolism. LINKED ARTICLES: This article is part of a themed issue on Canonical and non-canonical functions of the complement system in health and disease. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v178.14/issuetoc.
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Affiliation(s)
- Nicolas S Merle
- Complement and Inflammation Research Section (CIRS), National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Parul Singh
- Complement and Inflammation Research Section (CIRS), National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Jubayer Rahman
- Complement and Inflammation Research Section (CIRS), National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Claudia Kemper
- Complement and Inflammation Research Section (CIRS), National Heart, Lung and Blood Institute, National Institutes of Health (NIH), Bethesda, Maryland, USA.,Institute for Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
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9
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Interleukin-1 β Enhances Umbilical Cord Mesenchymal Stem Cell Adhesion Ability on Human Umbilical Vein Endothelial Cells via LFA-1/ICAM-1 Interaction. Stem Cells Int 2019; 2019:7267142. [PMID: 31949440 PMCID: PMC6948307 DOI: 10.1155/2019/7267142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/13/2019] [Accepted: 11/19/2019] [Indexed: 12/13/2022] Open
Abstract
The migration of administered mesenchymal stem cells (MSCs) to sites of injury via the bloodstream has been demonstrated. However, the underlying mechanisms of umbilical cord MSC adhesion to endothelial cells during transendothelial migration are still unclear. In this study, our data showed that IL-1β induced LFA-1 expression on MSCs and ICAM-1 expression on HUVECs. We then pretreated MSCs with protein synthesis inhibitor cycloheximide. The results showed that IL-1β induced LFA-1 expression on the surface of MSCs via the protein synthesis pathway. Through the p38 MAPK signaling pathway inhibitor SB 203580, we found that IL-1β induces the expression of LFA-1 through p38 MAPK signaling and enhances ICAM-1 expression in HUVECs. In addition, IL-1β-induced MSC adhesion to HUVECs was found to be inhibited by IL-1RA and the LFA-1 inhibitor lovastatin. These results indicate that IL-1β promotes the cell adhesion of MSCs to HUVECs through LFA-1/ICAM-1 interaction. We address the evidence that the cell adhesion mechanism of IL-1β promotes MSC adhesion to HUVECs. The implications of these findings could enhance the therapeutic potential of MSCs.
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10
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Verma NK, Chalasani MLS, Scott JD, Kelleher D. CG-NAP/Kinase Interactions Fine-Tune T Cell Functions. Front Immunol 2019; 10:2642. [PMID: 31781123 PMCID: PMC6861388 DOI: 10.3389/fimmu.2019.02642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/24/2019] [Indexed: 01/04/2023] Open
Abstract
CG-NAP, also known as AKAP450, is an anchoring/adaptor protein that streamlines signal transduction in various cell types by localizing signaling proteins and enzymes with their substrates. Great efforts are being devoted to elucidating functional roles of this protein and associated macromolecular signaling complex. Increasing understanding of pathways involved in regulating T lymphocytes suggests that CG-NAP can facilitate dynamic interactions between kinases and their substrates and thus fine-tune T cell motility and effector functions. As a result, new binding partners of CG-NAP are continually being uncovered. Here, we review recent advances in CG-NAP research, focusing on its interactions with kinases in T cells with an emphasis on the possible role of this anchoring protein as a target for therapeutic intervention in immune-mediated diseases.
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Affiliation(s)
- Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
| | | | - John D Scott
- Department of Pharmacology, University of Washington School of Medicine, Seattle, WA, United States
| | - Dermot Kelleher
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore.,Departments of Medicine and Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada
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11
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Jakoš T, Pišlar A, Jewett A, Kos J. Cysteine Cathepsins in Tumor-Associated Immune Cells. Front Immunol 2019; 10:2037. [PMID: 31555270 PMCID: PMC6724555 DOI: 10.3389/fimmu.2019.02037] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/12/2019] [Indexed: 12/23/2022] Open
Abstract
Cysteine cathepsins are key regulators of the innate and adaptive arms of the immune system. Their expression, activity, and subcellular localization are associated with the distinct development and differentiation stages of immune cells. They promote the activation of innate myeloid immune cells since they contribute to toll-like receptor signaling and to cytokine secretion. Furthermore, they control lysosomal biogenesis and autophagic flux, thus affecting innate immune cell survival and polarization. They also regulate bidirectional communication between the cell exterior and the cytoskeleton, thus influencing cell interactions, morphology, and motility. Importantly, cysteine cathepsins contribute to the priming of adaptive immune cells by controlling antigen presentation and are involved in cytotoxic granule mediated killing in cytotoxic T lymphocytes and natural killer cells. Cathepins'aberrant activity can be prevented by their endogenous inhibitors, cystatins. However, dysregulated proteolysis contributes significantly to tumor progression also by modulation of the antitumor immune response. Especially tumor-associated myeloid cells, such as tumor-associated macrophages and myeloid-derived suppressor cells, which are known for their tumor promoting and immunosuppressive functions, constitute the major source of excessive cysteine cathepsin activity in cancer. Since they are enriched in the tumor microenvironment, cysteine cathepsins represent exciting targets for development of new diagnostic and therapeutic moieties.
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Affiliation(s)
- Tanja Jakoš
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Anja Pišlar
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Anahid Jewett
- UCLA School of Dentistry and Medicine, Los Angeles, CA, United States
| | - Janko Kos
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.,Department of Biotechnology, Jožef Stefan Institute, Ljubljana, Slovenia
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12
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Fagerholm SC, Guenther C, Llort Asens M, Savinko T, Uotila LM. Beta2-Integrins and Interacting Proteins in Leukocyte Trafficking, Immune Suppression, and Immunodeficiency Disease. Front Immunol 2019; 10:254. [PMID: 30837997 PMCID: PMC6389632 DOI: 10.3389/fimmu.2019.00254] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 01/29/2019] [Indexed: 12/21/2022] Open
Abstract
Beta2-integrins are complex leukocyte-specific adhesion molecules that are essential for leukocyte (e.g., neutrophil, lymphocyte) trafficking, as well as for other immunological processes such as neutrophil phagocytosis and ROS production, and T cell activation. Intriguingly, however, they have also been found to negatively regulate cytokine responses, maturation, and migratory responses in myeloid cells such as macrophages and dendritic cells, revealing new, and unexpected roles of these molecules in immunity. Because of their essential role in leukocyte function, a lack of expression or function of beta2-integrins causes rare immunodeficiency syndromes, Leukocyte adhesion deficiency type I, and type III (LAD-I and LAD-III). LAD-I is caused by reduced or lost expression of beta2-integrins, whilst in LAD-III, beta2-integrins are expressed but dysfunctional because a major integrin cytoplasmic regulator, kindlin-3, is mutated. Interestingly, some LAD-related phenotypes such as periodontitis have recently been shown to be due to an uncontrolled inflammatory response rather than to an uncontrolled infection, as was previously thought. This review will focus on the recent advances concerning the regulation and functions of beta2-integrins in leukocyte trafficking, immune suppression, and immune deficiency disease.
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Affiliation(s)
- Susanna C Fagerholm
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Carla Guenther
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Marc Llort Asens
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | | | - Liisa M Uotila
- Research Services, University of Helsinki, Helsinki, Finland
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13
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Immunometabolomic Phenotyping of Motile T-Cells. Methods Mol Biol 2019. [PMID: 30610603 DOI: 10.1007/978-1-4939-9036-8_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The immune system and its components defend our body against diverse pathogens and help in maintaining tissue homeostasis. Immune cells are highly dynamic in terms of their growth, migration, differentiation, and effector functions, and adopt diverse metabolic configurations to respond to varying immunological challenges. Growing body of evidence suggests that metabolic pathways fuel immune cells for their functioning, including T-cell migration to the site of infection. This chapter provides detailed methodology for the efficient extraction of T-cell metabolites for successful downstream immunometabolomic profiling of motile T-lymphocytes.
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14
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The Role of Co-Stimulatory Molecules in Chagas Disease. Cells 2018; 7:cells7110200. [PMID: 30405039 PMCID: PMC6262639 DOI: 10.3390/cells7110200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 10/29/2018] [Accepted: 11/05/2018] [Indexed: 12/24/2022] Open
Abstract
Chagas disease, caused by Trypanosoma cruzi, is a potentially life-threatening tropical disease endemic to Latin American countries that affects approximately 8 million people. In the chronic phase of the disease, individuals are classified as belonging to the indeterminate clinical form or to the cardiac and/or digestive forms when clinical symptoms are apparent. The relationship between monocytes and lymphocytes may be an important point to help clarify the complexity that surrounds the clinical symptoms of the chronic phase of Chagas disease. The co-stimulatory signals are essential to determining the magnitude of T cell response to the antigen. The signals are known to determine the regulation of subsequent adaptive immune response. However, little is known about the expression and function of these molecules in Chagas disease. Therefore, this review aims to discuss the possible role of main pathways of co-stimulatory molecule-receptor interactions in this pathology that could be crucial to understand the disease dynamics.
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15
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Ong ST, Chalasani MLS, Fazil MHUT, Prasannan P, Kizhakeyil A, Wright GD, Kelleher D, Verma NK. Centrosome- and Golgi-Localized Protein Kinase N-Associated Protein Serves As a Docking Platform for Protein Kinase A Signaling and Microtubule Nucleation in Migrating T-Cells. Front Immunol 2018; 9:397. [PMID: 29545805 PMCID: PMC5837996 DOI: 10.3389/fimmu.2018.00397] [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: 10/07/2017] [Accepted: 02/13/2018] [Indexed: 02/01/2023] Open
Abstract
Centrosome- and Golgi-localized protein kinase N-associated protein (CG-NAP), also known as AKAP450, is a cytosolic scaffolding protein involved in the targeted positioning of multiple signaling molecules, which are critical for cellular functioning. Here, we show that CG-NAP is predominantly expressed in human primary T-lymphocytes, localizes in close proximity (<0.2 μm) with centrosomal and Golgi structures and serves as a docking platform for Protein Kinase A (PKA). GapmeR-mediated knockdown of CG-NAP inhibits LFA-1-induced T-cell migration and impairs T-cell chemotaxis toward the chemokine SDF-1α. Depletion of CG-NAP dislocates PKARIIα, disrupts centrosomal and non-centrosomal microtubule nucleation, causes Golgi fragmentation, and impedes α-tubulin tyrosination and acetylation, which are important for microtubule dynamics and stability in migrating T-cells. Furthermore, we show that CG-NAP coordinates PKA-mediated phosphorylation of pericentrin and dynein in T-cells. Overall, our findings provide critical insights into the roles of CG-NAP in regulating cytoskeletal architecture and T-cell migration.
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Affiliation(s)
- Seow Theng Ong
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | | | - M H U Turabe Fazil
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Praseetha Prasannan
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Atish Kizhakeyil
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | | | - Dermot Kelleher
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.,Department of Medicine, University of British Columbia, Vancouver, BC, Canada.,Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada
| | - Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.,Singapore Eye Research Institute, Singapore, Singapore
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16
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Role of LFA-1 and ICAM-1 in Cancer. Cancers (Basel) 2017; 9:cancers9110153. [PMID: 29099772 PMCID: PMC5704171 DOI: 10.3390/cancers9110153] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 10/23/2017] [Accepted: 10/23/2017] [Indexed: 12/30/2022] Open
Abstract
The lymphocyte function-associated antigen-1 (LFA-1) (also known as CD11a/CD18 and αLβ2), is just one of many integrins in the human body, but its significance is derived from its exclusive presence in leukocytes. In this review, we summarize the studies relating LFA-1 and its major ligand ICAM-1 (or CD54) with cancer, through the function of lymphocytes and myeloid cells on tumor cells. We consider how LFA-1 mediates the interaction of leukocytes with tumors and the role of ICAM-1 in tumor dynamics, which can be independent of its interaction with LFA-1. We also offer a more detailed examination of the role of LFA-1 within B-cell chronic lymphocytic leukemia. Finally, we discuss the role that exosomes harboring LFA-1 play in tumor growth and metastasis.
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17
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Verma NK, Kelleher D. Not Just an Adhesion Molecule: LFA-1 Contact Tunes the T Lymphocyte Program. THE JOURNAL OF IMMUNOLOGY 2017; 199:1213-1221. [PMID: 28784685 DOI: 10.4049/jimmunol.1700495] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 06/02/2017] [Indexed: 12/18/2022]
Abstract
The αLβ2 integrin LFA-1 is known to play a key role in T lymphocyte migration, which is necessary to mount a local immune response, and is also the main driver of autoimmune diseases. This migration-triggering signaling process in T cells is tightly regulated to permit an immune response that is appropriate to the local trigger, as well as to prevent deleterious tissue-damaging bystander effects. Emerging evidence shows that, in addition to prompting a diverse range of downstream signaling cascades, LFA-1 stimulation in T lymphocytes modulates gene-transcription programs, including genetic signatures of TGF-β and Notch pathways, with multifactorial biological outcomes. This review highlights recent findings and discusses molecular mechanisms by which LFA-1 signaling influence T lymphocyte differentiation into the effector subsets Th1, Th17, and induced regulatory T cells. We argue that LFA-1 contact with a cognate ligand, such as ICAM-1, independent of the immune synapse activates a late divergence in T cells' effector phenotypes, hence fine-tuning their functioning.
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Affiliation(s)
- Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921, Singapore; and
| | - Dermot Kelleher
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921, Singapore; and .,Faculty of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
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18
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Zhao S, Gu Z, Wang L, Guan L, Wang F, Yang N, Luo L, Gao Z, Song Y, Wang L, Liu D, Gao C. G-CSF inhibits LFA-1-mediated CD4 + T cell functions by inhibiting Lck and ZAP-70. Oncotarget 2017; 8:51578-51590. [PMID: 28881670 PMCID: PMC5584271 DOI: 10.18632/oncotarget.18194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 05/06/2017] [Indexed: 11/25/2022] Open
Abstract
In this study, we showed that G-CSF mobilization increased the frequency of T cells, specifically CD3+CD4+ T cells. G-CSF mobilization decreased the secretion of inflammatory cytokines of CD4+ T cells through the LFA-1/ICAM-1 signaling pathway, whereas it did not alter the TH1/TH2 ratio. We found that G-CSF mobilization inhibited LFA-1-mediated CD4+ T cell polarization and motility. In vitro, G-CSF stimulation also attenuated the polarization and adhesiveness of CD4+ T cells through the LFA-1/ICAM-1 interaction. Further investigation revealed that G-CSF mobilization suppressed LFA-1 signaling by down-regulating Lck and ZAP-70 expression in CD4+ T cells, similar results was also confirmed by in-vitro studies. These findings suggested that G-CSF directly suppressed LFA-1-mediated CD4+ T cell functions through the down-regulation of Lck and ZAP-70. The immunosuppressive effect of G-CSF mobilization deepened our understanding about peripheral blood hematopoietic stem cell transplantation. LFA-1/ICMA-1 pathway may become a potential target for graft-versus-host disease prophylaxis.
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Affiliation(s)
- Shasha Zhao
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China.,Medical School, Nankai University, Tianjin 300071, China
| | - Zhenyang Gu
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Li Wang
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China.,Department of Hematology and Oncology, Laoshan Branch, No. 401 Hospital of Chinese PLA, Qingdao 266101, China
| | - Lixun Guan
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Feiyan Wang
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Nan Yang
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Lan Luo
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Zhe Gao
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Yingwei Song
- Department of Blood Transfusion, Chinese PLA General Hospital, Beijing 100853, China
| | - Lili Wang
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Daihong Liu
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
| | - Chunji Gao
- Department of Hematology, Chinese PLA General Hospital, Beijing 100853, China
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19
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Li C, Liu S, Yan R, Han N, Wong KK, Li L. CD54-NOTCH1 axis controls tumor initiation and cancer stem cell functions in human prostate cancer. Theranostics 2017; 7:67-80. [PMID: 28042317 PMCID: PMC5196886 DOI: 10.7150/thno.16752] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/10/2016] [Indexed: 12/16/2022] Open
Abstract
Cancer stem cells (CSCs) are considered one of the key contributors to chemoresistance and tumor recurrence. Therefore, the precise identification of reliable CSC markers and clarification of the intracellular signaling involved in CSCs remains a great challenge in fields relating to cancer biology. Here, we implemented a novel chemoresistant prostate cancer patient-derived xenograft (PDX) model in NOD/SCID mice and identified CD54 as a candidate gene among the most highly enriched gene expression profiles in prostate tumors exposed to chronic cisplatin administration. Additional in vitro and in vivo assays showed that CD54 played a critical role in the self-renewal and tumorigenesis of prostate CSCs. Moreover, silencing CD54 greatly reduced the tumorigenesis of prostate cancers both in vitro and in vivo and significantly extended the survival time of tumor-bearing mice in a prostate cancer xenograft model. Dissection of the molecular mechanism revealed that the p38-Notch1 axis was the main downstream signaling pathway in CD54-mediated regulation of CSCs in prostate cancers. Together, these results established that CD54 could be a novel reliable prostate CSC marker and provided a new potential therapeutic target in prostate cancer via CD54-Notch1 signaling.
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20
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GapmeR cellular internalization by macropinocytosis induces sequence-specific gene silencing in human primary T-cells. Sci Rep 2016; 6:37721. [PMID: 27883055 PMCID: PMC5121623 DOI: 10.1038/srep37721] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 10/27/2016] [Indexed: 12/21/2022] Open
Abstract
Post-transcriptional gene silencing holds great promise in discovery research for addressing intricate biological questions and as therapeutics. While various gene silencing approaches, such as siRNA and CRISPR-Cas9 techniques, are available, these cannot be effectively applied to “hard-to-transfect” primary T-lymphocytes. The locked nucleic acid-conjugated chimeric antisense oligonucleotide, called “GapmeR”, is an emerging new class of gene silencing molecule. Here, we show that GapmeR internalizes into human primary T-cells through macropinocytosis. Internalized GapmeR molecules can associate with SNX5-positive macropinosomes in T-cells, as detected by super-resolution microscopy. Utilizing the intrinsic self-internalizing capability of GapmeR, we demonstrate significant and specific depletion (>70%) of the expression of 5 different endogenous proteins with varying molecular weights (18 kDa Stathmin, 80 kDa PKCε, 180 kDa CD11a, 220 kDa Talin1 and 450 kDa CG-NAP/AKAP450) in human primary and cultured T-cells. Further functional analysis confirms CG-NAP and Stathmin as regulators of T-cell motility. Thus, in addition to screening, identifying or verifying critical roles of various proteins in T-cell functioning, this study provides novel opportunities to silence individual or multiple genes in a subset of purified human primary T-cells that would be exploited as future therapeutics.
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21
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Mancuso RV, Welzenbach K, Steinberger P, Krähenbühl S, Weitz-Schmidt G. Downstream effect profiles discern different mechanisms of integrin αLβ2 inhibition. Biochem Pharmacol 2016; 119:42-55. [PMID: 27613223 DOI: 10.1016/j.bcp.2016.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 09/02/2016] [Indexed: 10/24/2022]
Abstract
The integrin leucocyte function-associated antigen-1 (αLβ2, LFA-1) plays crucial roles in T cell adhesion, migration and immunological synapse (IS) formation. Consequently, αLβ2 is an important therapeutic target in autoimmunity. Three major classes of αLβ2 inhibitors with distinct modes of action have been described to date: Monoclonal antibodies (mAbs), small molecule α/β I allosteric and small molecule α I allosteric inhibitors. The objective of this study was to systematically compare these three modes of αLβ2 inhibition for their αLβ2 inhibitory as well as their potential agonist-like effects. All inhibitors assessed were found to potently block αLβ2-mediated leucocyte adhesion. None of the inhibitors induced ZAP70 phosphorylation, indicating absence of agonistic outside-in signalling. Paradoxically, however, the α/β I allosteric inhibitor XVA143 induced conformational changes within αLβ2 characteristic for an intermediate affinity state. This effect was not observed with the α I allosteric inhibitor LFA878 or the anti-αLβ2 mAb efalizumab. On the other hand, efalizumab triggered the unscheduled internalization of αLβ2 in CD4+ and CD8+ T cells while LFA878 and XVA143 did not affect or only mildly reduced αLβ2 surface expression, respectively. Moreover, efalizumab, in contrast to the small molecule inhibitors, disturbed the fine-tuned internalization/recycling of engaged TCR/CD3, concomitantly decreasing ZAP70 expression levels. In conclusion, different modes of αLβ2 inhibition are associated with fundamentally different biologic effect profiles. The differential established here is expected to provide important translational guidance as novel αLβ2 inhibitors will be advanced from bench to bedside.
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Affiliation(s)
- Riccardo V Mancuso
- Division of Clinical Pharmacology and Toxicology and Department of Research, University Hospital, CH-4031 Basel, Switzerland
| | - Karl Welzenbach
- Novartis Pharma AG, Novartis Institutes of Biomedical Research, CH-4002 Basel, Switzerland
| | - Peter Steinberger
- Institute of Immunology, Medical University of Vienna, Lazarettgasse 19, 1090 Vienna, Austria
| | - Stephan Krähenbühl
- Division of Clinical Pharmacology and Toxicology and Department of Research, University Hospital, CH-4031 Basel, Switzerland
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22
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Verma NK, Fazil MHUT, Ong ST, Chalasani MLS, Low JH, Kottaiswamy A, P P, Kizhakeyil A, Kumar S, Panda AK, Freeley M, Smith SM, Boehm BO, Kelleher D. LFA-1/ICAM-1 Ligation in Human T Cells Promotes Th1 Polarization through a GSK3β Signaling–Dependent Notch Pathway. THE JOURNAL OF IMMUNOLOGY 2016; 197:108-18. [DOI: 10.4049/jimmunol.1501264] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 05/02/2016] [Indexed: 11/19/2022]
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23
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Welzenbach K, Mancuso RV, Krähenbühl S, Weitz-Schmidt G. A novel multi-parameter assay to dissect the pharmacological effects of different modes of integrin αLβ2 inhibition in whole blood. Br J Pharmacol 2015. [PMID: 26224111 DOI: 10.1111/bph.13256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND AND PURPOSE The integrin αLβ2 plays central roles in leukocyte adhesion and T cell activation, rendering αLβ2 an attractive therapeutic target. Compounds with different modes of αLβ2 inhibition are in development, currently. Consequently, there is a foreseeable need for bedside assays, which allow assessment of the different effects of diverse types of αLβ2 inhibitors in the peripheral blood of treated patients. EXPERIMENTAL APPROACH Here, we describe a flow cytometry-based technology that simultaneously quantitates αLβ2 conformational change upon inhibitor binding, αLβ2 expression and T cell activation at the single-cell level in human blood. Two classes of allosteric low MW inhibitors, designated α I and α/β I allosteric αLβ2 inhibitors, were investigated. The first application revealed intriguing inhibitor class-specific profiles. KEY RESULTS Half-maximal inhibition of T cell activation was associated with 80% epitope loss induced by α I allosteric inhibitors and with 40% epitope gain induced by α/β I allosteric inhibitors. This differential establishes that inhibitor-induced αLβ2 epitope changes do not directly predict the effect on T cell activation. Moreover, we show here for the first time that α/β I allosteric inhibitors, in contrast to α I allosteric inhibitors, provoked partial downmodulation of αLβ2, revealing a novel property of this inhibitor class. CONCLUSIONS AND IMPLICATIONS The multi-parameter whole blood αLβ2 assay described here may enable therapeutic monitoring of αLβ2 inhibitors in patients' blood. The assay dissects differential effect profiles of different classes of αLβ2 inhibitors.
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Affiliation(s)
- Karl Welzenbach
- Novartis Pharma AG, Novartis Institutes of Biomedical Research, Basel, Switzerland
| | - Riccardo V Mancuso
- Division of Clinical Pharmacology and Toxicology, University Hospital, Basel, Switzerland
| | - Stephan Krähenbühl
- Division of Clinical Pharmacology and Toxicology, University Hospital, Basel, Switzerland
| | - Gabriele Weitz-Schmidt
- Novartis Pharma AG, Novartis Institutes of Biomedical Research, Basel, Switzerland.,AlloCyte Pharmaceuticals AG, Basel, Switzerland
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24
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Verma NK, Kelleher D. Adaptor regulation of LFA-1 signaling in T lymphocyte migration: Potential druggable targets for immunotherapies? Eur J Immunol 2014; 44:3484-99. [PMID: 25251823 DOI: 10.1002/eji.201344428] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 09/16/2014] [Accepted: 09/22/2014] [Indexed: 01/24/2023]
Abstract
The integrin lymphocyte function associated antigen-1 (LFA-1) plays a key role in leukocyte trafficking and in adaptive immune responses through interactions with adhesive ligands, such as ICAM-1. Specific blockade of these interactions has validated LFA-1 as a therapeutic target in many chronic inflammatory diseases, however LFA-1 antagonists have not been clinically successful due to the development of a general immunosuppression, causing fatal side effects. Growing evidence has now established that LFA-1 mediates an array of intracellular signaling pathways by triggering a number of downstream molecules. In this context, a class of multimodular domain-containing proteins capable of recruiting two or more effector molecules, collectively known as "adaptor proteins," has emerged as important mediators in LFA-1 signal transduction. Here, we provide an overview of the adaptor proteins involved in the intracellular signaling cascades by which LFA-1 regulates T-cell motility and immune responses. The complexity of the LFA-1-associated signaling delineated in this review suggests that it may be an important and challenging focus for future research, enabling the identification of "tunable" targets for the development of immunotherapies.
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Affiliation(s)
- Navin K Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore; Singapore Eye Research Institute, Singapore, Singapore
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25
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Verhagen J, Wraith DC. Blockade of LFA-1 augments in vitro differentiation of antigen-induced Foxp3⁺ Treg cells. J Immunol Methods 2014; 414:58-64. [PMID: 25108241 PMCID: PMC4265731 DOI: 10.1016/j.jim.2014.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 06/30/2014] [Accepted: 07/28/2014] [Indexed: 12/24/2022]
Abstract
Adoptive transfer of antigen-specific, in vitro-induced Foxp3+ Treg (iTreg) cells protects against autoimmune disease. To generate antigen-specific iTreg cells at high purity, however, remains a challenge. Whereas polyclonal T cell stimulation with anti-CD3 and anti-CD28 antibody yields Foxp3+ iTreg cells at a purity of 90–95%, antigen-induced iTreg cells typically do not exceed a purity of 65–75%, even in a TCR-transgenic model. In a similar vein to thymic Treg cell selection, iTreg cell differentiation is influenced not only by antigen recognition and the availability of TGF-β but also by co-factors including costimulation and adhesion molecules. In this study, we demonstrate that blockade of the T cell integrin Leukocyte Function-associated Antigen-1 (LFA-1) during antigen-mediated iTreg cell differentiation augments Foxp3 induction, leading to approximately 90% purity of Foxp3+ iTreg cells. This increased efficacy not only boosts the yield of Foxp3+ iTreg cells, it also reduces contamination with activated effector T cells, thus improving the safety of adoptive transfer immunotherapy. iTreg cells can be generated in an antigen-specific manner, even if specific Tconv cells are present at low frequency. Blockade of anti-LFA-1 during iTreg cell differentiation augments Foxp3 induction. The blockade of LFA-1 alters the iTreg cell phenotype but does not impair stability or function.
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Affiliation(s)
- Johan Verhagen
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom.
| | - David C Wraith
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
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26
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Ong ST, Freeley M, Skubis-Zegadło J, Fazil MHUT, Kelleher D, Fresser F, Baier G, Verma NK, Long A. Phosphorylation of Rab5a protein by protein kinase Cϵ is crucial for T-cell migration. J Biol Chem 2014; 289:19420-34. [PMID: 24872409 DOI: 10.1074/jbc.m113.545863] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Rab GTPases control membrane traffic and receptor-mediated endocytosis. Within this context, Rab5a plays an important role in the spatial regulation of intracellular transport and signal transduction processes. Here, we report a previously uncharacterized role for Rab5a in the regulation of T-cell motility. We show that Rab5a physically associates with protein kinase Cϵ (PKCϵ) in migrating T-cells. After stimulation of T-cells through the integrin LFA-1 or the chemokine receptor CXCR4, Rab5a is phosphorylated on an N-terminal Thr-7 site by PKCϵ. Both Rab5a and PKCϵ dynamically interact at the centrosomal region of migrating cells, and PKCϵ-mediated phosphorylation on Thr-7 regulates Rab5a trafficking to the cell leading edge. Furthermore, we demonstrate that Rab5a Thr-7 phosphorylation is functionally necessary for Rac1 activation, actin rearrangement, and T-cell motility. We present a novel mechanism by which a PKCϵ-Rab5a-Rac1 axis regulates cytoskeleton remodeling and T-cell migration, both of which are central for the adaptive immune response.
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Affiliation(s)
- Seow Theng Ong
- From the From the Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, Dublin 8, Ireland
| | - Michael Freeley
- From the From the Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, Dublin 8, Ireland
| | - Joanna Skubis-Zegadło
- From the From the Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, Dublin 8, Ireland, Department of Applied Pharmacy and Bioengineering, Medical University of Warsaw, 02-091 Warsaw, Poland
| | | | - Dermot Kelleher
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 637553, Faculty of Medicine, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom, and
| | - Friedrich Fresser
- the Department of Medical Genetics, Molecular and Clinical Pharmacology, Innsbruck Medical University, A-6020 Innsbruck, Austria
| | - Gottfried Baier
- the Department of Medical Genetics, Molecular and Clinical Pharmacology, Innsbruck Medical University, A-6020 Innsbruck, Austria
| | - Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 637553,
| | - Aideen Long
- From the From the Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, Dublin 8, Ireland,
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27
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Kamata M, Tada Y, Mitsui A, Shibata S, Miyagaki T, Asano Y, Sugaya M, Kadono T, Sato S. ICAM-1 deficiency exacerbates sarcoid-like granulomatosis induced by Propionibacterium acnes through impaired IL-10 production by regulatory T cells. THE AMERICAN JOURNAL OF PATHOLOGY 2013; 183:1731-1739. [PMID: 24103557 DOI: 10.1016/j.ajpath.2013.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 08/12/2013] [Accepted: 08/15/2013] [Indexed: 01/12/2023]
Abstract
Propionibacterium acnes has been implicated as one of the suggested causative antigens for sarcoidosis, a systemic granulomatous disease. By injecting heat-killed P. acnes into the dorsal skin of C57BL/6J mice on days 1, 3, 5, and 14, sarcoid-like granulomatosis was induced in skin and lungs of these mice on day 28. To clarify the role of cell adhesion molecules in cutaneous sarcoidosis, we induced sarcoid-like granulomatosis in mice deficient of intercellular adhesion molecule (ICAM)-1, L-selectin, P-selectin, or E-selectin via repeated P. acnes injection. Histopathologic analysis revealed that granuloma formation was aggravated in the skin and lungs of ICAM-1-deficient mice compared with wild-type mice. Within skin granulomas of ICAM-1-deficient mice, P. acnes immunization up-regulated mRNA expression of tumor necrosis factor-α, although it failed to induce IL-10 mRNA expression in contrast to wild-type mice. Infiltration of regulatory T cells into skin granuloma was similar between wild-type mice and ICAM-1-deficient mice. P. acnes immunization induced IL-10 production by CD4(+)CD25(+)Foxp3(+) regulatory T cells in lymph nodes of wild-type mice in vivo, which was absent in regulatory T cells of ICAM-1-deficient mice. Our results indicate that ICAM-1 is imperative for inducing regulatory T cells to produce IL-10 in vivo, which would prevent granuloma formation.
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Affiliation(s)
- Masahiro Kamata
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Yayoi Tada
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan.
| | - Aya Mitsui
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Sayaka Shibata
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Tomomitsu Miyagaki
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Yoshihide Asano
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Makoto Sugaya
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Takafumi Kadono
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan
| | - Shinichi Sato
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Tokyo, Japan.
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28
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Yuan ML, Tong ZH, Jin XG, Zhang JC, Wang XJ, Ma WL, Yin W, Zhou Q, Ye H, Shi HZ. Regulation of CD4(+) T cells by pleural mesothelial cells via adhesion molecule-dependent mechanisms in tuberculous pleurisy. PLoS One 2013; 8:e74624. [PMID: 24069325 PMCID: PMC3777994 DOI: 10.1371/journal.pone.0074624] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 08/04/2013] [Indexed: 11/25/2022] Open
Abstract
Background Intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) have been demonstrated to be expressed on pleural mesothelial cells (PMCs), and to mediate leukocyte adhesion and migration; however, little is known about whether adhesion molecule-dependent mechanisms are involved in the regulation of CD4+ T cells by PMCs in tuberculous pleural effusion (TPE). Methods Expressions of ICAM-1 and VCAM-1 on PMCs, as well as expressions of CD11a and CD29, the counter-receptors for ICAM-1 and VCAM-1, respectively, expressed on CD4+ T cells in TPE were determined using flow cytometry. The immune regulations on adhesion, proliferation, activation, selective expansion of CD4+ helper T cell subgroups exerted by PMCs via adhesion molecule-dependent mechanisms were explored. Results Percentages of ICAM-1-positive and VCAM-1‒positive PMCs in TPE were increased compared with PMC line. Interferon-γ enhanced fluorescence intensity of ICAM-1, while IL-4 promoted VCAM-1 expression on PMCs. Percentages of CD11ahighCD4+ and CD29highCD4+ T cells in TPE significantly increased as compared with peripheral blood. Prestimulation of PMCs with anti‒ICAM-1 or ‒VCAM-1 mAb significantly inhibited adhesion, activation, as well as effector regulatory T cell expansion induced by PMCs. Conclusions Our current data showed that adhesion molecule pathways on PMCs regulated adhesion and activation of CD4+ T cells, and selectively promoted the expansion of effector regulatory T cells.
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Affiliation(s)
- Ming-Li Yuan
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhao-Hui Tong
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Center of Medical Research, Beijing Institute of Respiratory Diseases, Beijing, China
| | - Xiao-Guang Jin
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jian-Chu Zhang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Juan Wang
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Wan-Li Ma
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen Yin
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiong Zhou
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong Ye
- Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huan-Zhong Shi
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Center of Medical Research, Beijing Institute of Respiratory Diseases, Beijing, China
- * E-mail:
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