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Lane RS, Lund AW. Non-hematopoietic Control of Peripheral Tissue T Cell Responses: Implications for Solid Tumors. Front Immunol 2018; 9:2662. [PMID: 30498499 PMCID: PMC6249380 DOI: 10.3389/fimmu.2018.02662] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 10/29/2018] [Indexed: 12/16/2022] Open
Abstract
In response to pathological challenge, the host generates rapid, protective adaptive immune responses while simultaneously maintaining tolerance to self and limiting immune pathology. Peripheral tissues (e.g., skin, gut, lung) are simultaneously the first site of pathogen-encounter and also the location of effector function, and mounting evidence indicates that tissues act as scaffolds to facilitate initiation, maintenance, and resolution of local responses. Just as both effector and memory T cells must adapt to their new interstitial environment upon infiltration, tissues are also remodeled in the context of acute inflammation and disease. In this review, we present the biochemical and biophysical mechanisms by which non-hematopoietic stromal cells and extracellular matrix molecules collaborate to regulate T cell behavior in peripheral tissue. Finally, we discuss how tissue remodeling in the context of tumor microenvironments impairs T cell accumulation and function contributing to immune escape and tumor progression.
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Affiliation(s)
- Ryan S Lane
- Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, OR, United States
| | - Amanda W Lund
- Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, OR, United States.,Department of Molecular Microbiology and Immunology, Oregon Health and Science University, Portland, OR, United States.,Department of Dermatology, Oregon Health and Science University, Portland, OR, United States.,Knight Cancer Institute, Oregon Health and Science University, Portland, OR, United States
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52
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Jiang Z, Gao B, Hu M, Ding L, Lan Z, Yu M, Yu H, Cui Q, Lin J, Li M. Conserved structure and function of chemokine CXCL8 between Chinese tree shrews and humans. Gene 2018; 677:149-162. [DOI: 10.1016/j.gene.2018.07.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 06/23/2018] [Accepted: 07/10/2018] [Indexed: 12/11/2022]
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53
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Lu JM, Chen YC, Ao ZX, Shen J, Zeng CP, Lin X, Peng LP, Zhou R, Wang XF, Peng C, Xiao HM, Zhang K, Deng HW. System network analysis of genomics and transcriptomics data identified type 1 diabetes-associated pathway and genes. Genes Immun 2018; 20:500-508. [PMID: 30245508 DOI: 10.1038/s41435-018-0045-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/17/2018] [Accepted: 07/19/2018] [Indexed: 12/28/2022]
Abstract
Genome-wide association studies (GWASs) have discovered >50 risk loci for type 1 diabetes (T1D). However, those variations only have modest effects on the genetic risk of T1D. In recent years, accumulated studies have suggested that gene-gene interactions might explain part of the missing heritability. The purpose of our research was to identify potential and novel risk genes for T1D by systematically considering the gene-gene interactions through network analyses. We carried out a novel system network analysis of summary GWAS statistics jointly with transcriptomic gene expression data to identify some of the missing heritability for T1D using weighted gene co-expression network analysis (WGCNA). Using WGCNA, seven modules for 1852 nominally significant (P ≤ 0.05) GWAS genes were identified by analyzing microarray data for gene expression profile. One module (tagged as green module) showed significant association (P ≤ 0.05) between the module eigengenes and the trait. This module also displayed a high correlation (r = 0.45, P ≤ 0.05) between module membership (MM) and gene significant (GS), which indicated that the green module of co-expressed genes is of significant biological importance for T1D status. By further describing the module content and topology, the green module revealed a significant enrichment in the "regulation of immune response" (GO:0050776), which is a crucially important pathway in T1D development. Our findings demonstrated a module and several core genes that act as essential components in the etiology of T1D possibly via the regulation of immune response, which may enhance our fundamental knowledge of the underlying molecular mechanisms for T1D.
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Affiliation(s)
- Jun-Min Lu
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Yuan-Cheng Chen
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Zeng-Xin Ao
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Jie Shen
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Chun-Ping Zeng
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Xu Lin
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Lin-Ping Peng
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Rou Zhou
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Xia-Fang Wang
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Cheng Peng
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, Guangdong, PR China
| | - Hong-Mei Xiao
- School of Basic Medical Sciences, Central South University, Changsha, 410000, Hunan, PR China
| | - Kun Zhang
- Department of Computer Science, Bioinformatics Facility of Xavier NIH RCMI Cancer Research Center, Xavier University of Louisiana, New Orleans, LA, 70125, USA
| | - Hong-Wen Deng
- School of Basic Medical Sciences, Central South University, Changsha, 410000, Hunan, PR China. .,Southern Medical University, Guangzhou, 510515, Guangdong, PR China. .,Center for Bioinformatics and Genomics, Department of Biostatistics and Data Science, Tulane University, New Orleans, LA, 70112, USA.
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54
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Buckley CD, McGettrick HM. Leukocyte trafficking between stromal compartments: lessons from rheumatoid arthritis. Nat Rev Rheumatol 2018; 14:476-487. [DOI: 10.1038/s41584-018-0042-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Upregulation of chemokine CXCL10 enhances chronic pulmonary inflammation in tree shrew collagen-induced arthritis. Sci Rep 2018; 8:9993. [PMID: 29968810 PMCID: PMC6030082 DOI: 10.1038/s41598-018-28404-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 06/21/2018] [Indexed: 12/18/2022] Open
Abstract
Chronic pulmonary inflammation (CPI) gives rise to serious lung injuries in rheumatoid arthritis (RA) patients. However, the molecular mechanism underlying the pathogenesis of RA-associated CPI remains little understood. Here we established a novel tree shrew-based collagen-induced arthritis (TsCIA) model to study RA-associated CPI. Our results showed that typical CPI but not fibrosis developed pathologically in the TsCIA model. Furthermore, abnormal up-regulation of pulmonary chemokine CXCL10 was directly associated with lung damage. Specific blockage of CXCR3 (a CXCL10 receptor) significantly decreased the severity of CPI by decreasing the recruitment of inflammatory cells. Therefore, CXCL10 is proposed as a key player responsible for the development of TsCIA-associated CPI. Our findings also suggest that CXCR3 could be developed as a potential diagnosis biomarker for RA-associated CPI.
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Francisco V, Pino J, Gonzalez‐Gay MA, Mera A, Lago F, Gómez R, Mobasheri A, Gualillo O. Adipokines and inflammation: is it a question of weight? Br J Pharmacol 2018; 175:1569-1579. [PMID: 29486050 PMCID: PMC5913397 DOI: 10.1111/bph.14181] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/09/2018] [Accepted: 02/16/2018] [Indexed: 12/25/2022] Open
Abstract
Obesity has reached epidemic proportions in the Western society and is increasing in the developing world. It is considered as one of the major contributors to the global burden of disability and chronic diseases, including autoimmune, inflammatory and degenerative diseases. Research conducted on obesity and its complications over the last two decades has transformed the outdated concept of white adipose tissue (WAT) merely serving as an energy depot. WAT is now recognized as an active and inflammatory organ capable of producing a wide variety of factors known as adipokines. These molecules participate through endocrine, paracrine, autocrine or juxtacrine crosstalk mechanisms in a great variety of physiological or pathophysiological processes, regulating food intake, insulin sensitivity, immunity and inflammation. Although initially restricted to metabolic activities (regulation of glucose and lipid metabolism), adipokines currently represent a new family of proteins that can be considered key players in the complex network of soluble mediators involved in the pathophysiology of immune/inflammatory diseases. However, the complexity of the adipokine network in the pathogenesis and progression of inflammatory diseases has posed, since the beginning, the important question of whether it may be possible to target the mechanism(s) by which adipokines contribute to disease selectively without suppressing their physiological functions. Here, we explore in depth the most recent findings concerning the involvement of adipokines in inflammation and immune responses, in particular in rheumatic, inflammatory and degenerative diseases. We also highlight several possible strategies for therapeutic development and propose that adipokines and their signalling pathways may represent innovative therapeutic strategies for inflammatory disorders.
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Affiliation(s)
- Vera Francisco
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases)Santiago University Clinical HospitalBuilding C, Travesía da Choupana S/NSantiago de Compostela15706Spain
| | - Jesus Pino
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases)Santiago University Clinical HospitalBuilding C, Travesía da Choupana S/NSantiago de Compostela15706Spain
| | - Miguel Angel Gonzalez‐Gay
- Epidemiology, Genetics and Atherosclerosis Research Group on Systemic Inflammatory DiseasesUniversidad de Cantabria and IDIVAL, Hospital Universitario Marqués de ValdecillaAv. ValdecillaSantander39008Spain
| | - Antonio Mera
- SERGAS (Servizo Galego de Saude), Division of RheumatologySantiago University Clinical HospitalTravesía da Choupana S/NSantiago de Compostela15706Spain
| | - Francisca Lago
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), Department of Cellular and Molecular CardiologyCIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Building CTravesía da Choupana S/NSantiago de Compostela15706Spain
| | - Rodolfo Gómez
- Musculoskeletal Pathology Group. SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), Research Laboratory 9Santiago University Clinical HospitalSantiago de CompostelaSpain
| | - Ali Mobasheri
- Faculty of Health and Medical SciencesUniversity of SurreyGuildfordSurreyGU2 7XHUK
- School of Veterinary MedicineUniversity of SurreyGuildfordGU2 7ALUK
- Arthritis Research UK Centre for Sport, Exercise and Osteoarthritis, Arthritis Research UK Centre for Musculoskeletal Ageing ResearchQueen's Medical CentreNottinghamNG7 2UHUK
- State Research Institute Centre for Innovative MedicineSantariskiu 5Vilnius0866Republic of Lithuania
| | - Oreste Gualillo
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases)Santiago University Clinical HospitalBuilding C, Travesía da Choupana S/NSantiago de Compostela15706Spain
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Abstract
Chronic diseases are defined diseases whose symptoms last for at least six months and tend to worsen over time. In Europe, they cause at least 86% of deaths. In this speculative unifying model I set a new hypothesis for the etiology of the majority of chronic diseases. The main aim is to put order and observe our organism in a systemic way, connecting pathologies we now see as disconnected phenomena, with the conceptual frameworks of complex systems and network medicine. Chronic diseases could be caused by a first unsolved acute infection. In case the pathogen cannot be completely eliminated, it becomes a persistent infectious. After the acute episode, some mild symptoms will occur and probably disappear; the chronic disease will remain latent over time. It will manifest even after years or decades, in the presence of another acute infection, a particular stress, trauma, or another event. The presence of the persistent infectious elicits changes in the immune and systemic regulation, and these processes degenerate over time. They will assume their rules and patterns, being independent from the initial stimulus. The key to understand the dynamics and individuality of chronic diseases is the immune system and its networks. The immune mechanisms that can lead to the persistent response are mainly the switch from the Th1 to the Th2 immunity and the molecular mimicry. The first persistent infectious will also modify the susceptibility to other pathogens, facilitating new infections and new consequent persistent infectious. From the immune point of view, our organism is divided into three compartments: the outer one, which comprehend all the surfaces in contact with the environment, the intermediate one, which comprehend the internal organs and tissues, and the innermost one, comprehending the Central Nervous System and the adluminal compartment of the seminiferous tubule. The immune key-role is played respectively by the mucosa-associated lymphoid tissue, the endothelium, the blood-brain barrier and blood-testis barrier. The chronic diseases follow a progressive scheme, involving the three compartments from the outer to the innermost one. The primer microorganism at the origin of the majority of diseases could be streptococcus, or staphylococcus. Both cause acute in children, with a great variability of responses and symptoms, and both cause molecular mimicry. This model can be tested and proved in more ways, I propose here some of them. It could pave the way to a radical change in our comprehension and therapeutic approaches to chronic diseases.
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Wang X, Shen H, Zhangyuan G, Huang R, Zhang W, He Q, Jin K, Zhuo H, Zhang Z, Wang J, Sun B, Lu X. 14-3-3ζ delivered by hepatocellular carcinoma-derived exosomes impaired anti-tumor function of tumor-infiltrating T lymphocytes. Cell Death Dis 2018; 9:159. [PMID: 29415983 PMCID: PMC5833352 DOI: 10.1038/s41419-017-0180-7] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/23/2017] [Accepted: 11/24/2017] [Indexed: 02/07/2023]
Abstract
Increasing evidence shows that the anti-tumor functions of tumor-infiltrating T lymphocytes (TILs) were inhibited significantly, but the underlying mechanisms remain not fully understood. In this study, we found that 14-3-3ζ expression was up-regulated in hepatocellular carcinoma (HCC) cells and in TILs. TILs with 14-3-3ζ high-expression (14-3-3ζhigh) exhibited impaired activation (CD69), proliferation (Ki67) and anti-tumor functions compared to 14-3-3ζ low expression (14-3-3ζlow) TILs. Flow cytometry assay showed that compared with 14-3-3ζlow CD8+T cells, 14-3-3ζhigh ones exhibited higher frequency of exhausted phenotypes as measured by inhibitory receptors such as PD-1, TIM-3, LAG3, and CTLA-4. 14-3-3ζ overexpression inhibited the activity and proliferation of peripheral blood CD3+ T cells, deviated the differentiation of naive T cells from effector T cells to regulatory T cells. Moreover, we found that 14-3-3ζ expression levels in TILs correlated positively with those in HCC cells. Naive T cells co-cultured with HCC cells or the visible components of culture medium of HCC cells exhibited increased 14-3-3ζ expression. Stochastic optical reconstruction microscopy (STORM) and confocal assay showed that 14-3-3ζ-containing exosomes derived from HCC cells could be swallowed by T cells, suggesting that 14-3-3ζ might be transmitted from HCC cells to TILs at least partially through exosomes. In conclusion, our study for the first time demonstrated that 14-3-3ζ is up-regulated in and inhibited the anti-tumor functions of tumor-infiltrating T cells in HCC microenvironment and that 14-3-3ζ might be transmitted from HCC cells to T cells at least partially through exosomes.
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Affiliation(s)
- Xiaochen Wang
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Haiyuan Shen
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Guangyan Zhangyuan
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Ruyi Huang
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Wenjie Zhang
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Qifeng He
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Kangpeng Jin
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Han Zhuo
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Zechuan Zhang
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Jincheng Wang
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China
| | - Beicheng Sun
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China.
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, 210009, China.
| | - Xiaojie Lu
- Liver Transplantation Center of the First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, 210029, China.
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59
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Zhang W, Kim H, Lv J, Zhao N, Ma X. Golgi Phosphoprotein 2 Is a Novel Regulator of IL-12 Production and Macrophage Polarization. THE JOURNAL OF IMMUNOLOGY 2018; 200:1480-1488. [DOI: 10.4049/jimmunol.1700897] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 12/04/2017] [Indexed: 12/14/2022]
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S1P Lyase Regulation of Thymic Egress and Oncogenic Inflammatory Signaling. Mediators Inflamm 2017; 2017:7685142. [PMID: 29333002 PMCID: PMC5733215 DOI: 10.1155/2017/7685142] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 09/13/2017] [Indexed: 12/17/2022] Open
Abstract
Sphingosine-1-phosphate (S1P) is a potent lipid signaling molecule that regulates pleiotropic biological functions including cell migration, survival, angiogenesis, immune cell trafficking, inflammation, and carcinogenesis. It acts as a ligand for a family of cell surface receptors. S1P concentrations are high in blood and lymph but low in tissues, especially the thymus and lymphoid organs. S1P chemotactic gradients are essential for lymphocyte egress and other aspects of physiological cell trafficking. S1P is irreversibly degraded by S1P lyase (SPL). SPL regulates lymphocyte trafficking, inflammation and other physiological and pathological processes. For example, SPL located in thymic dendritic cells acts as a metabolic gatekeeper that controls the normal egress of mature T lymphocytes from the thymus into the circulation, whereas SPL deficiency in gut epithelial cells promotes colitis and colitis-associated carcinogenesis (CAC). Recently, we identified a complex syndrome comprised of nephrosis, adrenal insufficiency, and immunological defects caused by inherited mutations in human SGPL1, the gene encoding SPL. In the present article, we review current evidence supporting the role of SPL in thymic egress, inflammation, and cancer. Lastly, we summarize recent progress in understanding other SPL functions, its role in inherited disease, and SPL targeting for therapeutic purposes.
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Jaigirdar SA, Benson RA, Elmesmari A, Kurowska-Stolarska MS, McInnes IB, Garside P, MacLeod MKL. Sphingosine-1-Phosphate Promotes the Persistence of Activated CD4 T Cells in Inflamed Sites. Front Immunol 2017; 8:1627. [PMID: 29225602 PMCID: PMC5705559 DOI: 10.3389/fimmu.2017.01627] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/09/2017] [Indexed: 12/21/2022] Open
Abstract
Inflammation can be protective or pathogenic depending on context and timeframe. Acute inflammation, including the accumulation of CD4 T cells, accompanies protective immune responses to pathogens, but the presence of activated CD4 T cells at sites of inflammation is associated with chronic inflammatory disease. While significant progress has been made in understanding the migration of CD4 T cells into inflamed sites, the signals that lead to their persistence are poorly characterized. Using a murine ear model of acute inflammation and intravital two-photon imaging, we have dissected the signals that mediate CD4 T cell persistence. We report the unexpected finding that the bioactive lipid, sphingosine-1-phosphate (S1P), is both necessary and sufficient for the persistence of activated CD4 T cells at peripheral tissues in acute inflammation. S1P mediated the enhanced motility of CD4 T cells at inflamed tissues but did not affect their migration to the downstream draining lymph node. We found that sphingosine kinase-1, which regulates S1P production is increased at inflamed sites in mice and in patients with the chronic inflammatory disease, rheumatoid arthritis. Together, these data suggest that S1P, or its regulators, may be key targets to promote or disrupt accumulation of CD4 T cells at inflamed tissues.
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Affiliation(s)
- Shafqat Ahrar Jaigirdar
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Robert A Benson
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Aziza Elmesmari
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | | | - Iain B McInnes
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Paul Garside
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Megan K L MacLeod
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
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Molino S, Tate E, McKillop WM, Medin JA. Sphingolipid pathway enzymes modulate cell fate and immune responses. Immunotherapy 2017; 9:1185-1198. [DOI: 10.2217/imt-2017-0089] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Sphingolipids (SLs) are a class of essential, bioactive lipids. The SL family includes over 4000 distinct molecules, characterized by their sphingoid base (long-chain aliphatic amine) backbone. SLs are key components of cell membranes, yet their roles go well beyond structure. SLs are involved in many cellular processes including cell differentiation, apoptosis, growth arrest and senescence. As cancer cells routinely display increased growth properties and escape from cell death, it has been suggested that enzymes involved in SL synthesis or catabolism may be altered in cancer cells. In this review, we discuss the role of SL pathway enzymes in cancer, and in acquired resistance to therapy. The use of inhibitors and gene silencing approaches targeting these SL pathways is also explored. Finally, we elaborate on the role of SL pathway enzymes in the tumor microenvironment and their effect on immune cell function.
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Affiliation(s)
- S Molino
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
| | - E Tate
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
| | - WM McKillop
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
| | - JA Medin
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA
- Department of Medical Biophysics & the Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
- Department of Medical Biophysics, University Health Network, Toronto, Ontario, Canada
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63
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Bharath LP, Ip BC, Nikolajczyk BS. Adaptive Immunity and Metabolic Health: Harmony Becomes Dissonant in Obesity and Aging. Compr Physiol 2017; 7:1307-1337. [PMID: 28915326 DOI: 10.1002/cphy.c160042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Adipose tissue (AT) is the primary energy reservoir organ, and thereby plays a critical role in energy homeostasis and regulation of metabolism. AT expands in response to chronic overnutrition or aging and becomes a major source of inflammation that has marked influence on systemic metabolism. The chronic, sterile inflammation that occurs in the AT during the development of obesity or in aging contributes to onset of devastating diseases such as insulin resistance, diabetes, and cardiovascular pathologies. Numerous studies have shown that inflammation in the visceral AT of humans and animals is a critical trigger for the development of metabolic syndrome. This work underscores the well-supported conclusion that the inflammatory immune response and metabolic pathways in the AT are tightly interwoven by multiple layers of relatively conserved mechanisms. During the development of diet-induced obesity or age-associated adiposity, cells of the innate and the adaptive immune systems infiltrate and proliferate in the AT. Macrophages, which dominate AT-associated immune cells in mouse models of obesity, but are less dominant in obese people, have been studied extensively. However, cells of the adaptive immune system, including T cells and B cells, contribute significantly to AT inflammation, perhaps more in humans than in mice. Lymphocytes regulate recruitment of innate immune cells into AT, and produce cytokines that influence the helpful-to-harmful inflammatory balance that, in turn, regulates organismal metabolism. This review describes inflammation, or more precisely, metabolic inflammation (metaflammation) with an eye toward the AT and the roles lymphocytes play in regulation of systemic metabolism during obesity and aging. © 2017 American Physiological Society. Compr Physiol 7:1307-1337, 2017.
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Affiliation(s)
- Leena P Bharath
- Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Blanche C Ip
- Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA.,Department of Molecular Pharmacology, Physiology and Biotechnology, Center of Biomedical Engineering, Brown University, Providence, Rhode Island, USA
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Filer A, Ward LSC, Kemble S, Davies CS, Munir H, Rogers R, Raza K, Buckley CD, Nash GB, McGettrick HM. Identification of a transitional fibroblast function in very early rheumatoid arthritis. Ann Rheum Dis 2017; 76:2105-2112. [PMID: 28847766 PMCID: PMC5705853 DOI: 10.1136/annrheumdis-2017-211286] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 08/02/2017] [Accepted: 08/05/2017] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Synovial fibroblasts actively regulate the inflammatory infiltrate by communicating with neighbouring endothelial cells (EC). Surprisingly, little is known about how the development of rheumatoid arthritis (RA) alters these immunomodulatory properties. We examined the effects of phase of RA and disease outcome (resolving vs persistence) on fibroblast crosstalk with EC and regulation of lymphocyte recruitment. METHODS Fibroblasts were isolated from patients without synovitis, with resolving arthritis, very early RA (VeRA; symptom ≤12 weeks) and established RA undergoing joint replacement (JRep) surgery. Endothelial-fibroblast cocultures were formed on opposite sides of porous filters. Lymphocyte adhesion from flow, secretion of soluble mediators and interleukin 6 (IL-6) signalling were assessed. RESULTS Fibroblasts from non-inflamed and resolving arthritis were immunosuppressive, inhibiting lymphocyte recruitment to cytokine-treated endothelium. This effect was lost very early in the development of RA, such that fibroblasts no longer suppressed recruitment. Changes in IL-6 and transforming growth factor beta 1 (TGF-β1) signalling appeared critical for the loss of the immunosuppressive phenotype. In the absence of exogenous cytokines, JRep, but not VeRA, fibroblasts activated endothelium to support lymphocyte. CONCLUSIONS In RA, fibroblasts undergo two distinct changes in function: first a loss of immunosuppressive responses early in disease development, followed by the later acquisition of a stimulatory phenotype. Fibroblasts exhibit a transitional functional phenotype during the first 3 months of symptoms that contributes to the accumulation of persistent infiltrates. Finally, the role of IL-6 and TGF-β1 changes from immunosuppressive in resolving arthritis to stimulatory very early in the development of RA. Early interventions targeting 'pathogenic' fibroblasts may be required in order to restore protective regulatory processes.
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Affiliation(s)
- Andrew Filer
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK.,Department of Rheumatology, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - Lewis S C Ward
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK
| | - Samuel Kemble
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK
| | | | - Hafsa Munir
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Rebekah Rogers
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK
| | - Karim Raza
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK.,Department of Rheumatology, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - Christopher Dominic Buckley
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK.,Department of Rheumatology, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - Gerard B Nash
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Helen M McGettrick
- Rheumatology Research Group, Arthritis Research UK Centre of Excellence in the Pathogenesis of Rheumatoid Arthritis, Institute of Inflammation and Ageing, Birmingham, UK
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65
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Pecoraro A, Nigro E, Polito R, Monaco ML, Scudiero O, Mormile I, Cesoni Marcelli A, Capasso M, Habetswallner F, Genovese A, Daniele A, Spadaro G. Total and High Molecular Weight Adiponectin Expression Is Decreased in Patients with Common Variable Immunodeficiency: Correlation with Ig Replacement Therapy. Front Immunol 2017; 8:895. [PMID: 28824624 PMCID: PMC5534466 DOI: 10.3389/fimmu.2017.00895] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/13/2017] [Indexed: 12/21/2022] Open
Abstract
Adiponectin (Acrp30) is an adipokine widely studied for its beneficial metabolic properties. It circulates as low molecular weight (LMW), medium molecular weight (MMW), and high molecular weight (HMW) oligomers. The latter exerts the most potent biological effects. Acrp30 attracted renewed interest with the finding that it was associated with the development and progression of immune disorders. The mechanisms underlying this association and the role of Acrp30 in the pathophysiology of immune-mediated conditions remain unknown. Common variable immunodeficiency (CVID) is a primary immunodeficiency characterized by chronic activation of the immune system, impaired antibody production, and imbalanced cytokine production. In the attempt to shed light on the expression of Acrp30 in CVID, we: (a) investigated total Acrp30 and its oligomerization state in CVID patients undergoing maintenance Ig replacement therapy; (b) assessed the effects of Ig replacement therapy on Acrp30 expression in treatment-naïve CVID patients, namely, patients not treated before diagnosis, before and after the first Ig administration; and (c) evaluated the correlation between Acrp30 levels and clinical phenotypes of the disease. As controls, we analyzed healthy subjects and patients affected by a non-immunodeficiency chronic inflammatory demyelinating polyneuropathy (CIDP), before and after Ig infusion. We found that total Acrp30 and HMW oligomers were decreased in CVID but not in CIDP patients versus controls. Moreover, Acrp30 levels were correlated with IgA levels and were associated with two CVID phenotypes, namely, autoimmune cytopenia and enteropathy. Receiver operating characteristic curve analysis indicated that Acrp30 modulation is specific for CVID patients. Acrp30 and HMW levels quickly and dramatically increased after Ig infusion only in eight treatment-naïve CVID patients but not in five CIDP patients. This finding indicates that Ig administration per se is not able to induce an increase of Acrp30, but the specific cellular and/or molecular background proper of CVID seems to be essential. In conclusion, our data indicate that Acrp30 is specifically related to CVID activity. Further studies are required to understand the biological role of Acrp30 and its possible use as disease biomarker in CVID.
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Affiliation(s)
- Antonio Pecoraro
- Department of Translational Medical Sciences, Allergy and Clinical Immunology, University of Naples Federico II, Naples, Italy
| | - Ersilia Nigro
- CEINGE-Biotecnologie Avanzate Scarl, Napoli, Italy.,Dipartimento di Scienze e Tecnologie Ambientali Biologiche Farmaceutiche, Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
| | - Rita Polito
- CEINGE-Biotecnologie Avanzate Scarl, Napoli, Italy.,Dipartimento di Scienze e Tecnologie Ambientali Biologiche Farmaceutiche, Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
| | | | - Olga Scudiero
- CEINGE-Biotecnologie Avanzate Scarl, Napoli, Italy.,Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy
| | - Ilaria Mormile
- Department of Translational Medical Sciences, Allergy and Clinical Immunology, University of Naples Federico II, Naples, Italy
| | - Azzurra Cesoni Marcelli
- Department of Translational Medical Sciences, Allergy and Clinical Immunology, University of Naples Federico II, Naples, Italy
| | - Mario Capasso
- CEINGE-Biotecnologie Avanzate Scarl, Napoli, Italy.,Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy
| | - Francesco Habetswallner
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy
| | - Arturo Genovese
- Department of Translational Medical Sciences, Allergy and Clinical Immunology, University of Naples Federico II, Naples, Italy
| | - Aurora Daniele
- CEINGE-Biotecnologie Avanzate Scarl, Napoli, Italy.,Dipartimento di Scienze e Tecnologie Ambientali Biologiche Farmaceutiche, Università degli Studi della Campania "Luigi Vanvitelli", Caserta, Italy
| | - Giuseppe Spadaro
- Department of Translational Medical Sciences, Allergy and Clinical Immunology, University of Naples Federico II, Naples, Italy
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66
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Reyat JS, Chimen M, Noy PJ, Szyroka J, Rainger GE, Tomlinson MG. ADAM10-Interacting Tetraspanins Tspan5 and Tspan17 Regulate VE-Cadherin Expression and Promote T Lymphocyte Transmigration. THE JOURNAL OF IMMUNOLOGY 2017; 199:666-676. [PMID: 28600292 PMCID: PMC5502317 DOI: 10.4049/jimmunol.1600713] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 05/10/2017] [Indexed: 12/25/2022]
Abstract
The recruitment of blood leukocytes across the endothelium to sites of tissue infection is central to inflammation, but also promotes chronic inflammatory diseases. A disintegrin and metalloproteinase 10 (ADAM10) is a ubiquitous transmembrane molecular scissor that is implicated in leukocyte transmigration by proteolytically cleaving its endothelial substrates. These include VE-cadherin, a homotypic adhesion molecule that regulates endothelial barrier function, and transmembrane chemokines CX3CL1 and CXCL16, which have receptors on leukocytes. However, a definitive role for endothelial ADAM10 in transmigration of freshly isolated primary leukocytes under flow has not been demonstrated, and the relative importance of distinct ADAM10 substrates is unknown. Emerging evidence suggests that ADAM10 can be regarded as six different molecular scissors with different substrate specificities, depending on which of six TspanC8 tetraspanins it is associated with, but TspanC8s remain unstudied in leukocyte transmigration. In the current study, ADAM10 knockdown on primary HUVECs was found to impair transmigration of freshly isolated human peripheral blood T lymphocytes, but not neutrophils or B lymphocytes, in an in vitro flow assay. This impairment was due to delayed transmigration rather than a complete block, and was overcome in the presence of neutrophils. Transmigration of purified lymphocytes was dependent on ADAM10 regulation of VE-cadherin, but not CX3CL1 and CXCL16. Tspan5 and Tspan17, the two most closely related TspanC8s by sequence, were the only TspanC8s that regulated VE-cadherin expression and were required for lymphocyte transmigration. Therefore endothelial Tspan5- and Tspan17-ADAM10 complexes may regulate inflammation by maintaining normal VE-cadherin expression and promoting T lymphocyte transmigration.
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Affiliation(s)
- Jasmeet S Reyat
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and.,Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Myriam Chimen
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Peter J Noy
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and
| | - Justyna Szyroka
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and
| | - G Ed Rainger
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Michael G Tomlinson
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and
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67
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Munir H, Ward LSC, Sheriff L, Kemble S, Nayar S, Barone F, Nash GB, McGettrick HM. Adipogenic Differentiation of Mesenchymal Stem Cells Alters Their Immunomodulatory Properties in a Tissue-Specific Manner. Stem Cells 2017; 35:1636-1646. [PMID: 28376564 PMCID: PMC6052434 DOI: 10.1002/stem.2622] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 02/08/2017] [Accepted: 03/10/2017] [Indexed: 12/27/2022]
Abstract
Chronic inflammation is associated with formation of ectopic fat deposits that might represent damage-induced aberrant mesenchymal stem cell (MSC) differentiation. Such deposits are associated with increased levels of inflammatory infiltrate and poor prognosis. Here we tested the hypothesis that differentiation from MSC to adipocytes in inflamed tissue might contribute to chronicity through loss of immunomodulatory function. We assessed the effects of adipogenic differentiation of MSC isolated from bone marrow or adipose tissue on their capacity to regulate neutrophil recruitment by endothelial cells and compared the differentiated cells to primary adipocytes from adipose tissue. Bone marrow derived MSC were immunosuppressive, inhibiting neutrophil recruitment to TNFα-treated endothelial cells (EC), but MSC-derived adipocytes were no longer able to suppress neutrophil adhesion. Changes in IL-6 and TGFβ1 signalling appeared critical for the loss of the immunosuppressive phenotype. In contrast, native stromal cells, adipocytes derived from them, and mature adipocytes from adipose tissue were all immunoprotective. Thus disruption of normal tissue stroma homeostasis, as occurs in chronic inflammatory diseases, might drive "abnormal" adipogenesis which adversely influences the behavior of MSC and contributes to pathogenic recruitment of leukocytes. Interestingly, stromal cells programmed in native fat tissue retain an immunoprotective phenotype. Stem Cells 2017;35:1636-1646.
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Affiliation(s)
- Hafsa Munir
- Institute for Cardiovascular Sciences, College of Medical and Dental Sciences
| | - Lewis S C Ward
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Lozan Sheriff
- Institute for Cardiovascular Sciences, College of Medical and Dental Sciences
| | - Samuel Kemble
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Saba Nayar
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Francesca Barone
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Gerard B Nash
- Institute for Cardiovascular Sciences, College of Medical and Dental Sciences
| | - Helen M McGettrick
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
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68
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Obeid S, Wankell M, Charrez B, Sternberg J, Kreuter R, Esmaili S, Ramezani-Moghadam M, Devine C, Read S, Bhathal P, Lopata A, Ahlensteil G, Qiao L, George J, Hebbard L. Adiponectin confers protection from acute colitis and restricts a B cell immune response. J Biol Chem 2017; 292:6569-6582. [PMID: 28258220 DOI: 10.1074/jbc.m115.712646] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/21/2017] [Indexed: 12/18/2022] Open
Abstract
Adiponectin demonstrates beneficial effects in various metabolic diseases, including diabetes, and in bowel cancer. Recent data also suggest a protective role in colitis. However, the precise molecular mechanisms by which adiponectin and its receptors modulate colitis and the nature of the adaptive immune response in murine models are yet to be elucidated. Adiponectin knock-out mice were orally administered dextran sulfate sodium for 7 days and were compared with wild-type mice. The severity of disease was analyzed histopathologically and through cytokine profiling. HCT116 colonic epithelial cells were employed to analyze the in vitro effects of adiponectin and AdipoR1 interactions in colonic injury following dextran sulfate sodium treatment. Adiponectin knock-out mice receiving dextran sulfate sodium exhibited severe colitis, had greater inflammatory cell infiltration, and an increased presence of activated B cells compared with controls. This was accompanied by an exaggerated proinflammatory cytokine profile and increased STAT3 signaling. Adiponectin knock-out mouse colons had markedly reduced proliferation and increased epithelial apoptosis and cellular stress. In vitro, adiponectin reduced apoptotic, anti-proliferative, and stress signals and restored STAT3 signaling. Following the abrogation of AdipoR1 in vitro, these protective effects of adiponectin were abolished. In summary, adiponectin maintains intestinal homeostasis and protects against murine colitis through interactions with its receptor AdipoR1 and by modulating adaptive immunity.
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Affiliation(s)
- Stephanie Obeid
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | | | | | | | | | - Saeed Esmaili
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Mehdi Ramezani-Moghadam
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Carol Devine
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Scott Read
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Prithi Bhathal
- the University of Melbourne, Victoria, VIC 3010, Australia, and
| | | | - Golo Ahlensteil
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Liang Qiao
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Jacob George
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia
| | - Lionel Hebbard
- From the Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW 2145, Australia, .,the Department of Molecular and Cell Biology and.,Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia
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69
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Chimen M, Yates CM, McGettrick HM, Ward LSC, Harrison MJ, Apta B, Dib LH, Imhof BA, Harrison P, Nash GB, Rainger GE. Monocyte Subsets Coregulate Inflammatory Responses by Integrated Signaling through TNF and IL-6 at the Endothelial Cell Interface. THE JOURNAL OF IMMUNOLOGY 2017; 198:2834-2843. [PMID: 28193827 PMCID: PMC5357784 DOI: 10.4049/jimmunol.1601281] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 01/20/2017] [Indexed: 01/13/2023]
Abstract
Two major monocyte subsets, CD14+CD16− (classical) and CD14+/dimCD16+ (nonclassical/intermediate), have been described. Each has different functions ascribed in its interactions with vascular endothelial cells (EC), including migration and promoting inflammation. Although monocyte subpopulations have been studied in isolated systems, their influence on EC and on the course of inflammation has been ignored. In this study, using unstimulated or cytokine-activated EC, we observed significant differences in the recruitment, migration, and reverse migration of human monocyte subsets. Associated with this, and based on their patterns of cytokine secretion, there was a difference in their capacity to activate EC and support the secondary recruitment of flowing neutrophils. High levels of TNF were detected in cocultures with nonclassical/intermediate monocytes, the blockade of which significantly reduced neutrophil recruitment. In contrast, classical monocytes secreted high levels of IL-6, the blockade of which resulted in increased neutrophil recruitment. When cocultures contained both monocyte subsets, or when conditioned supernatant from classical monocytes cocultures (IL-6hi) was added to nonclassical/intermediate monocyte cocultures (TNFhi), the activating effects of TNF were dramatically reduced, implying that when present, the anti-inflammatory activities of IL-6 were dominant over the proinflammatory activities of TNF. These changes in neutrophil recruitment could be explained by regulation of E-selectin on the cocultured EC. This study suggests that recruited human monocyte subsets trigger a regulatory pathway of cytokine-mediated signaling at the EC interface, and we propose that this is a mechanism for limiting the phlogistic activity of newly recruited monocytes.
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Affiliation(s)
- Myriam Chimen
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Clara M Yates
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Helen M McGettrick
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and
| | - Lewis S C Ward
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and
| | - Matthew J Harrison
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Bonita Apta
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Lea H Dib
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Beat A Imhof
- Department of Pathology and Immunology, University of Geneva, 1211 Geneva, Switzerland
| | - Paul Harrison
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; and
| | - Gerard B Nash
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - G Ed Rainger
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom;
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70
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Kaplan A, Bueno M, Fournier AE. Extracellular functions of 14-3-3 adaptor proteins. Cell Signal 2017; 31:26-30. [DOI: 10.1016/j.cellsig.2016.12.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 12/13/2016] [Accepted: 12/15/2016] [Indexed: 01/09/2023]
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71
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Abstract
Lymphocyte recruitment in inflammation can be influenced by many molecules including cytokines, chemokines, and adipokines. In our lab, we have examined the effects of the adipokines leptin and adiponectin on lymphocyte migration, and observed modulation of this process. Lymphocyte behavior can be assessed in the lab under static conditions, or can be studied under flow, simulating in vivo conditions. In this chapter, in vitro methods for analyzing adhesion and migration of lymphocytes isolated from blood are described in detail. In static adhesion and migration assays, lymphocytes are allowed to settle on top of endothelial cell monolayers cultured in plates for a desired period of time. In the flow-based assay, lymphocytes are perfused over the endothelium at a continuous rate through microchannels which are commercially available. Depending on the choice of method employed, the efficiency of lymphocytes to adhere to and migrate across the endothelial cell monolayer under different conditions can be evaluated. Static assays are less complex and are of higher throughput. However, these assays provide less detailed information regarding lymphocyte behaviors. On the other hand, the flow-based assays are more difficult to perform, but are more physiologically relevant due to the presence of flow and yield more detailed information about lymphocyte activities such as capture, immobilization, and migration in real-time.
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72
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Chimen M, Apta BHR, Mcgettrick HM. Introduction: T Cell Trafficking in Inflammation and Immunity. Methods Mol Biol 2017; 1591:73-84. [PMID: 28349476 DOI: 10.1007/978-1-4939-6931-9_6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
T cell migration across vascular endothelium is essential for T cell responses, as through the expression of specific tissue-homing receptors, these cells then access peripheral tissues, with the goal of eliminating invading pathogens and/or tumor cells. However, aberrant trafficking of T cells to peripheral tissues contributes to the development of most chronic inflammatory diseases. Very little is known about the mechanisms by which T cell trafficking is regulated during inflammation, and it is thus difficult to target this aspect of pathology for the development of new therapies. It is therefore important to understand the pathways involved in regulating the recruitment of immune cells.
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Affiliation(s)
- Myriam Chimen
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Bonita H R Apta
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Vincent Drive, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Helen M Mcgettrick
- Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK.
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73
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Zhang B, Shi Y, Gong A, Pan Z, Shi H, Yang H, Fu H, Yan Y, Zhang X, Wang M, Zhu W, Qian H, Xu W. HucMSC Exosome-Delivered 14-3-3ζ Orchestrates Self-Control of the Wnt Response via Modulation of YAP During Cutaneous Regeneration. Stem Cells 2016; 34:2485-2500. [PMID: 27334574 DOI: 10.1002/stem.2432] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/27/2016] [Accepted: 05/06/2016] [Indexed: 12/13/2022]
Abstract
Numerous studies showed that mesenchymal stem cells derived exosome (MSC-Ex) markedly enhanced tissue regeneration, however, the issue of whether MSC-Ex could control stem cells expansion after a regenerative response to prevent tissue from overcrowding and dysplasia remains to be established. Herein, we found that human umbilical cord MSC (hucMSC)-exosomal14-3-3ζ mediated the binding of YAP and p-LATS by forming a complex to promote the phosphorylation of YAP, which orchestrate exosomal Wnt4 signal in cutaneous regeneration. First, we assessed deep second-degree burn rats treated with hucMSC-Ex and discovered that hucMSC-Ex promoting self-regulation of Wnt/β-catenin signaling at the remodeling phase of cutaneous regeneration. HucMSC-Ex restricted excessive skin cell expansion and collagen deposition at 4 weeks. Under high cell density conditions, hucMSC-Ex inhibited Wnt/β-catenin signaling through induction of YAP phosphorylation. Second, hucMSC-Ex proteomic analysis revealed that 14-3-3 proteins could be transported by exosome. Using gain- and loss-of-function studies, our results showed that hucMSC-exosomal 14-3-3ζ controlled YAP activities and phosphorylation at Ser127 site, and were required for the binding of YAP and p-LATS. Further studies revealed that 14-3-3ζ recruited YAP and p-LATS to form a complex under high cells density status and 14-3-3ζ other than YAP or p-LATS was the key regulatory molecule of this complex. These findings collectively indicate that hucMSC-Ex functions not only as an "accelerator" of the Wnt/β-catenin signal to repair damaged skin tissue but also as a "brake" of the signal by modulating YAP to orchestrate controlled cutaneous regeneration. Stem Cells 2016;34:2485-2500.
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Affiliation(s)
- Bin Zhang
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Yinghong Shi
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Aihua Gong
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Zhaoji Pan
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Hui Shi
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Huan Yang
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Hailong Fu
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Yongmin Yan
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Xu Zhang
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Mei Wang
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Wei Zhu
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine
| | - Hui Qian
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine.
| | - Wenrong Xu
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine.
- The Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, 212000, P. R. China.
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74
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Abstract
B-1 lymphocytes exhibit unique phenotypic, ontogenic, and functional characteristics that differ from the conventional B-2 cells. B-1 cells spontaneously secrete germline-like, repertoire-skewed polyreactive natural antibody, which acts as a first line of defense by neutralizing a wide range of pathogens before launching of the adaptive immune response. Immunomodulatory molecules such as interleukin-10, adenosine, granulocyte-macrophage colony-stimulating factor, interleukin-3, and interleukin-35 are also produced by B-1 cells in the presence or absence of stimulation, which regulate acute and chronic inflammatory diseases. Considerable progress has been made during the past three decades since the discovery of B-1 cells, which has improved not only our understanding of their phenotypic and ontogenic uniqueness but also their role in various inflammatory diseases including influenza, pneumonia, sepsis, atherosclerosis, inflammatory bowel disease, autoimmunity, obesity and diabetes mellitus. Recent identification of human B-1 cells widens the scope of this field, leading to novel innovations that can be implemented from bench to bedside. Among the vast number of studies on B-1 cells, we have carried out a literature review highlighting current trends in the study of B-1 cell involvement during inflammation, which may result in a paradigm shift toward sustainable therapeutics in various inflammatory diseases.
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Affiliation(s)
- Monowar Aziz
- Center for Translational Research, Feinstein Institute for Medical Research, 350 Community Dr., Manhasset, NY, 11030, USA
| | - Nichol E Holodick
- Center for Oncology and Cell Biology, Feinstein Institute for Medical Research, 350 Community Dr., Manhasset, NY, 11030, USA
| | - Thomas L Rothstein
- Center for Oncology and Cell Biology, Feinstein Institute for Medical Research, 350 Community Dr., Manhasset, NY, 11030, USA
| | - Ping Wang
- Center for Translational Research, Feinstein Institute for Medical Research, 350 Community Dr., Manhasset, NY, 11030, USA. .,Department of Surgery, Hofstra North Shore-LIJ School of Medicine, 350 Community Dr., Manhasset, NY, 11030, USA.
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75
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Saul L, Ilieva KM, Bax HJ, Karagiannis P, Correa I, Rodriguez-Hernandez I, Josephs DH, Tosi I, Egbuniwe IU, Lombardi S, Crescioli S, Hobbs C, Villanova F, Cheung A, Geh JLC, Healy C, Harries M, Sanz-Moreno V, Fear DJ, Spicer JF, Lacy KE, Nestle FO, Karagiannis SN. IgG subclass switching and clonal expansion in cutaneous melanoma and normal skin. Sci Rep 2016; 6:29736. [PMID: 27411958 PMCID: PMC4944184 DOI: 10.1038/srep29736] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 06/22/2016] [Indexed: 12/19/2022] Open
Abstract
B cells participate in immune surveillance in human circulation and tissues, including tumors such as melanoma. By contrast, the role of humoral responses in cutaneous immunity is underappreciated. We report circulating skin-homing CD22+CLA+B cells in healthy volunteers and melanoma patients (n = 73) and CD22+ cells in melanoma and normal skin samples (n = 189). Normal and malignant skin featured mature IgG and CD22 mRNA, alongside mRNA for the transiently-expressed enzyme Activation-induced cytidine Deaminase (AID). Gene expression analyses of publically-available data (n = 234 GEO, n = 384 TCGA) confirmed heightened humoral responses (CD20, CD22, AID) in melanoma. Analyses of 51 melanoma-associated and 29 normal skin-derived IgG sequence repertoires revealed lower IgG1/IgGtotal representation compared with antibodies from circulating B cells. Consistent with AID, comparable somatic hypermutation frequencies and class-switching indicated affinity-matured antibodies in normal and malignant skin. A melanoma-associated antibody subset featured shorter complementarity-determining (CDR3) regions relative to those from circulating B cells. Clonal amplification in melanoma-associated antibodies and homology modeling indicated differential potential antigen recognition profiles between normal skin and melanoma sequences, suggesting distinct antibody repertoires. Evidence for IgG-expressing B cells, class switching and antibody maturation in normal and malignant skin and clonally-expanded antibodies in melanoma, support the involvement of mature B cells in cutaneous immunity.
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Affiliation(s)
- Louise Saul
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Division of Cancer Studies, Faculty of Life Sciences and Medicine, King's College London, 3rd Floor Bermondsey Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Kristina M Ilieva
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Breast Cancer Now Research Unit, Division of Cancer Studies, Faculty of Life Sciences and Medicine, King's College London, 3rd Floor Bermondsey Wing, Guy's Hospital, London, United Kingdom
| | - Heather J Bax
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Division of Cancer Studies, Faculty of Life Sciences and Medicine, King's College London, 3rd Floor Bermondsey Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Panagiotis Karagiannis
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Isabel Correa
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Irene Rodriguez-Hernandez
- Tumour Plasticity Laboratory, Randall Division of Cell and Molecular Biophysics, New Hunt's House, Guy's Campus, King's College London, London SE1 1UL, United Kingdom
| | - Debra H Josephs
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Division of Cancer Studies, Faculty of Life Sciences and Medicine, King's College London, 3rd Floor Bermondsey Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Isabella Tosi
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Isioma U Egbuniwe
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Sara Lombardi
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Skin Tumor Unit, St. John's Institute of Dermatology, Guy's Hospital, King's College London and Guy's and St Thomas' NHS Trust, London, United Kingdom
| | - Silvia Crescioli
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Carl Hobbs
- Wolfson Center for Age-Related Diseases; King's College London, London, UK
| | - Federica Villanova
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Anthony Cheung
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Breast Cancer Now Research Unit, Division of Cancer Studies, Faculty of Life Sciences and Medicine, King's College London, 3rd Floor Bermondsey Wing, Guy's Hospital, London, United Kingdom
| | - Jenny L C Geh
- Department of Plastic Surgery at Guy's, King's, and St. Thomas' Hospitals, London, United Kingdom
| | - Ciaran Healy
- Department of Plastic Surgery at Guy's, King's, and St. Thomas' Hospitals, London, United Kingdom
| | - Mark Harries
- Clinical Oncology, Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom
| | - Victoria Sanz-Moreno
- Tumour Plasticity Laboratory, Randall Division of Cell and Molecular Biophysics, New Hunt's House, Guy's Campus, King's College London, London SE1 1UL, United Kingdom
| | - David J Fear
- Division of Asthma, Allergy and Lung Biology, Medical Research Council and Asthma UK Centre in Allergic Mechanisms of Asthma, Faculty of Life Sciences and Medicine, King's College London, Guy's Campus, London, United Kingdom
| | - James F Spicer
- Division of Cancer Studies, Faculty of Life Sciences and Medicine, King's College London, 3rd Floor Bermondsey Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Katie E Lacy
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom.,Skin Tumor Unit, St. John's Institute of Dermatology, Guy's Hospital, King's College London and Guy's and St Thomas' NHS Trust, London, United Kingdom
| | - Frank O Nestle
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
| | - Sophia N Karagiannis
- St. John's Institute of Dermatology, Division of Genetics and Molecular Medicine, Faculty of Life Sciences and Medicine, King's College London &NIHR Biomedical Research Centre at Guy's and St. Thomas's Hospitals and King's College London, King's College London, London SE1 9RT, United Kingdom
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76
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Luo Y, Liu M. Adiponectin: a versatile player of innate immunity. J Mol Cell Biol 2016; 8:120-8. [PMID: 26993045 DOI: 10.1093/jmcb/mjw012] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 01/04/2016] [Indexed: 02/06/2023] Open
Abstract
Adiponectin acts as a key regulator of the innate immune system and plays a major role in the progression of inflammation and metabolic disorders. Macrophages and monocytes are representative components of the innate immune system, and their proliferation, plasticity, and polarization are a key component of metabolic adaption. Innate-like lymphocytes such as group 2 innate lymphoid cells (ILC2s), natural killer T (NKT) cells, and gamma delta T (γδ T) cells are also members of the innate immune system and play important roles in the development of obesity and its related diseases. Adiponectin senses metabolic stress and modulates metabolic adaption by targeting the innate immune system under physiological and pathological conditions. Defining the mechanisms underlying the role of adiponectin in regulating innate immunity is crucial to adiponectin-based therapeutic intervention.
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Affiliation(s)
- Yan Luo
- Institute of Metabolism and Endocrinology, Metabolic Syndrome Research Center, the Second Xiangya Hospital, Central South University, Changsha 410011, China Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA
| | - Meilian Liu
- Institute of Metabolism and Endocrinology, Metabolic Syndrome Research Center, the Second Xiangya Hospital, Central South University, Changsha 410011, China Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA
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77
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Sphingosine-1-Phosphate Signaling in Immune Cells and Inflammation: Roles and Therapeutic Potential. Mediators Inflamm 2016; 2016:8606878. [PMID: 26966342 PMCID: PMC4761394 DOI: 10.1155/2016/8606878] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 01/03/2016] [Indexed: 12/26/2022] Open
Abstract
Sphingosine-1-phosphate (S1P) is a bioactive sphingolipid metabolite involved in many critical cell processes. It is produced by the phosphorylation of sphingosine by sphingosine kinases (SphKs) and exported out of cells via transporters such as spinster homolog 2 (Spns2). S1P regulates diverse physiological processes by binding to specific G protein-binding receptors, S1P receptors (S1PRs) 1-5, through a process coined as "inside-out signaling." The S1P concentration gradient between various tissues promotes S1PR1-dependent migration of T cells from secondary lymphoid organs into the lymphatic and blood circulation. S1P suppresses T cell egress from and promotes retention in inflamed peripheral tissues. S1PR1 in T and B cells as well as Spns2 in endothelial cells contributes to lymphocyte trafficking. FTY720 (Fingolimod) is a functional antagonist of S1PRs that induces systemic lymphopenia by suppression of lymphocyte egress from lymphoid organs. In this review, we summarize previous findings and new discoveries about the importance of S1P and S1PR signaling in the recruitment of immune cells and lymphocyte retention in inflamed tissues. We also discuss the role of S1P-S1PR1 axis in inflammatory diseases and wound healing.
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78
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Involvement of B cells in non-infectious uveitis. Clin Transl Immunology 2016; 5:e63. [PMID: 26962453 PMCID: PMC4771944 DOI: 10.1038/cti.2016.2] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 01/04/2016] [Accepted: 01/04/2016] [Indexed: 12/14/2022] Open
Abstract
Non-infectious uveitis-or intraocular inflammatory disease-causes substantial visual morbidity and reduced quality of life amongst affected individuals. To date, research of pathogenic mechanisms has largely been focused on processes involving T lymphocyte and/or myeloid leukocyte populations. Involvement of B lymphocytes has received relatively little attention. In contrast, B-cell pathobiology is a major field within general immunological research, and large clinical trials have showed that treatments targeting B cells are highly effective for multiple systemic inflammatory diseases. B cells, including the terminally differentiated plasma cell that produces antibody, are found in the human eye in different forms of non-infectious uveitis; in some cases, these cells outnumber other leukocyte subsets. Recent case reports and small case series suggest that B-cell blockade may be therapeutic for patients with non-infectious uveitis. As well as secretion of antibody, B cells may promote intraocular inflammation by presentation of antigen to T cells, production of multiple inflammatory cytokines and support of T-cell survival. B cells may also perform various immunomodulatory activities within the eye. This translational review summarizes the evidence for B-cell involvement in non-infectious uveitis, and considers the potential contributions of B cells to the development and control of the disease. Manipulations of B cells and/or their products are promising new approaches to the treatment of non-infectious uveitis.
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79
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“United we Win”, Communication is the Key for a Better Future in Scleroderma. JOURNAL OF SCLERODERMA AND RELATED DISORDERS 2016. [DOI: 10.5301/jsrd.5000196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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80
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Abstract
Immune responses depend on the ability of leukocytes to move from the circulation into tissue. This is enabled by mechanisms that guide leukocytes to the right exit sites and allow them to cross the barrier of the blood vessel wall. This process is regulated by a concerted action between endothelial cells and leukocytes, whereby endothelial cells activate leukocytes and direct them to extravasation sites, and leukocytes in turn instruct endothelial cells to open a path for transmigration. This Review focuses on recently described mechanisms that control and open exit routes for leukocytes through the endothelial barrier.
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81
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Saba JD. A B cell-dependent mechanism restrains T cell transendothelial migration. Nat Med 2015; 21:424-6. [PMID: 25951526 DOI: 10.1038/nm.3858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Julie D Saba
- Children's Hospital Oakland Research Institute, University of California, San Francisco (UCSF) Benioff Children's Hospital Oakland, Oakland, California, USA
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82
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T cell responses: B cells control T cell traffic. Nat Rev Immunol 2015; 15:332-3. [PMID: 25976514 DOI: 10.1038/nri3860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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