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Svandova E, Vesela B, Kratochvilova A, Holomkova K, Oralova V, Dadakova K, Burger T, Sharpe P, Lesot H, Matalova E. Markers of dental pulp stem cells in in vivo developmental context. Ann Anat 2023; 250:152149. [PMID: 37574172 DOI: 10.1016/j.aanat.2023.152149] [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: 04/26/2023] [Revised: 07/10/2023] [Accepted: 07/24/2023] [Indexed: 08/15/2023]
Abstract
Teeth and their associated tissues contain several populations of mesenchymal stem cells, one of which is represented by dental pulp stem cells (DPSCs). These cells have mainly been characterised in vitro and numerous positive and negati ve markers for these cells have been suggested. To investigate the presence and localization of these molecules during development, forming dental pulp was examined using the mouse first mandibular molar as a model. The stages corresponding to postnatal (P) days 0, 7, 14, and 21 were investigated. The expression was monitored using customised PCR Arrays. Additionally, in situ localization of the key trio of markers (Cd73, Cd90, Cd105 coded by genes Nt5e, Thy1, Eng) was performed at prenatal and postnatal stages using immunohistochemistry. The expression panel of 24 genes assigned as in vitro markers of DPSCs or mesenchymal stem cells (MSCs) revealed their developmental dynamics during formation of dental pulp mesenchyme. Among the positive markers, Vcam1, Fgf2, Nes were identified as increasing and Cd44, Cd59b, Mcam, Alcam as decreasing between perinatal vs. postnatal stages towards adulthood. Within the panel of negative DPSC markers, Cd14, Itgb2, Ptprc displayed increased and Cd24a decreased levels at later stages of pulp formation. Within the key trio of markers, Nt5e did not show any significant expression difference within the investigated period. Thy1 displayed a strong decrease between P0 and P7 while Eng increased between these stages. In situ localization of Cd73, Cd90 and Cd105 showed them overlap in differentiated odontoblasts and in the sub-odontoblastic layer that is speculated to host odontoblast progenitors. The highly prevalent expression of particularly Cd73 and Cd90 opens the question of potential multiple functions of these molecules. The results from this study add to the in vitro based knowledge by showing dynamics in the expression of DPSC/MSC markers during dental pulp formation in an in vivo context and thus with respect to the natural environment important for commitment of stem cells.
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Affiliation(s)
- Eva Svandova
- Institute of Animal Physiology and Genetics, Brno, Czech Republic; Masaryk University, Brno, Czech Republic
| | - Barbora Vesela
- Institute of Animal Physiology and Genetics, Brno, Czech Republic; Veterinary University, Brno, Czech Republic
| | | | | | - Veronika Oralova
- Institute of Animal Physiology and Genetics, Brno, Czech Republic
| | | | - Tom Burger
- Veterinary University, Brno, Czech Republic
| | - Paul Sharpe
- Institute of Animal Physiology and Genetics, Brno, Czech Republic; King's College London, London, United Kingdom.
| | - Herve Lesot
- Institute of Animal Physiology and Genetics, Brno, Czech Republic
| | - Eva Matalova
- Institute of Animal Physiology and Genetics, Brno, Czech Republic; Veterinary University, Brno, Czech Republic
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2
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Wei H, Yin Y, Yang W, Zhu J, Chen L, Guo R, Yang Z, Li S. Nuciferine induces autophagy to relieve vascular cell adhesion molecule 1 activation via repressing the Akt/mTOR/AP1 signal pathway in the vascular endothelium. Front Pharmacol 2023; 14:1264324. [PMID: 37841916 PMCID: PMC10569124 DOI: 10.3389/fphar.2023.1264324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 09/14/2023] [Indexed: 10/17/2023] Open
Abstract
Pro-inflammatory factor-associated vascular cell adhesion molecule 1 (VCAM1) activation initiates cardiovascular events. This study aimed to explore the protective role of nuciferine on TNFα-induced VCAM1 activation. Nuciferine was administrated to both high-fat diet (HFD)-fed mice and the TNFα-exposed human vascular endothelial cell line. VCAM1 expression and further potential mechanism(s) were explored. Our data revealed that nuciferine intervention alleviated VCAM1 activation in response to both high-fat diet and TNFα exposure, and this protective effect was closely associated with autophagy activation since inhibiting autophagy by either genetic or pharmaceutical approaches blocked the beneficial role of nuciferine. Mechanistical studies revealed that Akt/mTOR inhibition, rather than AMPK, SIRT1, and p38 signal pathways, contributed to nuciferine-activated autophagy, which further ameliorated TNFα-induced VCAM1 via repressing AP1 activation, independent of transcriptional regulation by IRF1, p65, SP1, and GATA6. Collectively, our data uncovered a novel biological function for nuciferine in protecting VCAM1 activation, implying its potential application in improving cardiovascular events.
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Affiliation(s)
- Haibin Wei
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Biobank, Zhejiang Cancer Hospital, Hangzhou, Zhejiang, China
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Yujie Yin
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Wenwen Yang
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jinyan Zhu
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Lin Chen
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Rui Guo
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhen Yang
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Songtao Li
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Clinical Nutrition, Affiliated Zhejiang Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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Singh V, Kaur R, Kumari P, Pasricha C, Singh R. ICAM-1 and VCAM-1: Gatekeepers in various inflammatory and cardiovascular disorders. Clin Chim Acta 2023; 548:117487. [PMID: 37442359 DOI: 10.1016/j.cca.2023.117487] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/10/2023] [Accepted: 07/10/2023] [Indexed: 07/15/2023]
Abstract
Leukocyte migration from the vascular compartment is critical fornormal lymphocyte recirculation in specific tissues and immune response in inflammatory locations. Leukocyte recruitment, migration to inflammatory areas, and targeting in the extravascular space are caused by cellular stimulation and local expression of adhesion molecules. Intercellular adhesion molecule 1 (ICAM-1) and Vascular cell adhesion molecule 1 (VCAM-1) belong to the immunoglobulin superfamily of cell adhesion molecules (CAM) with a crucial role in mediating the strong adherence of leukocytes to endothelial cells in numerous acute as well as chronic diseases. ICAM-1 and VCAM-1 mediate inflammation and promote leukocyte migration during inflammation. ICAM-1 and VCAM-1 have a large role in regulating homeostasis and in pathologic states such as cancer, atherosclerosis, atrial fibrillation, myocardial infarction, stroke, asthma, obesity, kidney diseases, and much more. In inflammatory conditions and infectious disorders, leukocytes move and cling to the endothelium via multiple intracellular adhesive interactions. It is suggested that combining membrane-bound and soluble ICAM-1 and VCAM-1 into a single unit functional system will further our understanding of their immunoregulatory role as well as their pathophysiological effects on disease. This review focuses on the pathophysiological roles of ICAM-1 and VCAM-1 in various inflammatory and other diseases as well as their emerging cardiovascular role during the COVID-19 pandemic.
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Affiliation(s)
- Varinder Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Rupinder Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Pratima Kumari
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Chirag Pasricha
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Ravinder Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India.
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4
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Xiong Y, Cai M, Xu Y, Dong P, Chen H, He W, Zhang J. Joint together: The etiology and pathogenesis of ankylosing spondylitis. Front Immunol 2022; 13:996103. [PMID: 36325352 PMCID: PMC9619093 DOI: 10.3389/fimmu.2022.996103] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 09/28/2022] [Indexed: 08/16/2023] Open
Abstract
Spondyloarthritis (SpA) refers to a group of diseases with inflammation in joints and spines. In this family, ankylosing spondylitis (AS) is a rare but classic form that mainly involves the spine and sacroiliac joint, leading to the loss of flexibility and fusion of the spine. Compared to other diseases in SpA, AS has a very distinct hereditary disposition and pattern of involvement, and several hypotheses about its etiopathogenesis have been proposed. In spite of significant advances made in Th17 dynamics and AS treatment, the underlying mechanism remains concealed. To this end, we covered several topics, including the nature of the immune response, the microenvironment in the articulation that is behind the disease's progression, and the split between the hypotheses and the evidence on how the intestine affects arthritis. In this review, we describe the current findings of AS and SpA, with the aim of providing an integrated view of the initiation of inflammation and the development of the disease.
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Affiliation(s)
- Yuehan Xiong
- Department of Immunology, Chinese Academy of Medical Sciences (CAMS) Key Laboratory of T Cell and Cancer Immunotherapy, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Menghua Cai
- Department of Immunology, Chinese Academy of Medical Sciences (CAMS) Key Laboratory of T Cell and Cancer Immunotherapy, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Yi Xu
- Department of Immunology, Chinese Academy of Medical Sciences (CAMS) Key Laboratory of T Cell and Cancer Immunotherapy, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Peng Dong
- Changzhou Xitaihu Institute for Frontier Technology of Cell Therapy, Changzhou, China
| | - Hui Chen
- Department of Immunology, Chinese Academy of Medical Sciences (CAMS) Key Laboratory of T Cell and Cancer Immunotherapy, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and School of Basic Medicine, Peking Union Medical College, Beijing, China
- Changzhou Xitaihu Institute for Frontier Technology of Cell Therapy, Changzhou, China
| | - Wei He
- Department of Immunology, Chinese Academy of Medical Sciences (CAMS) Key Laboratory of T Cell and Cancer Immunotherapy, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and School of Basic Medicine, Peking Union Medical College, Beijing, China
- Changzhou Xitaihu Institute for Frontier Technology of Cell Therapy, Changzhou, China
| | - Jianmin Zhang
- Department of Immunology, Chinese Academy of Medical Sciences (CAMS) Key Laboratory of T Cell and Cancer Immunotherapy, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and School of Basic Medicine, Peking Union Medical College, Beijing, China
- Changzhou Xitaihu Institute for Frontier Technology of Cell Therapy, Changzhou, China
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5
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Guo Q, Furuta K, Islam S, Caporarello N, Kostallari E, Dielis K, Tschumperlin DJ, Hirsova P, Ibrahim SH. Liver sinusoidal endothelial cell expressed vascular cell adhesion molecule 1 promotes liver fibrosis. Front Immunol 2022; 13:983255. [PMID: 36091042 PMCID: PMC9453231 DOI: 10.3389/fimmu.2022.983255] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/05/2022] [Indexed: 12/04/2022] Open
Abstract
Background During liver injury, liver sinusoidal endothelial cells (LSECs) dysfunction and capillarization promote liver fibrosis. We have previously reported that the LSEC vascular cell adhesion molecule 1 (VCAM1) plays a key role in liver inflammation in nonalcoholic steatohepatitis (NASH) and we now aim to uncover its role in LSEC capillarization and liver fibrosis. Methods Wild-type C57BL/6J mice were fed either chow or high fat, fructose and cholesterol diet to induce NASH and treated with either anti-VCAM1 neutralizing antibody or control isotype antibody. Inducible endothelial cell-specific Vcam1 deleted mice (Vcam1Δend ) and control mice (Vcam1fl/fl ) were fed choline-deficient high-fat diet (CD-HFD) to induce NASH or injected with carbon tetrachloride to induce liver fibrosis. LSECs isolated from Vcam1fl/fl or Vcam1Δend and hepatic stellate cells (HSCs) isolated from wild-type mice were cocultured in a 3-D system or a μ-Slide 2 well co-culture system. Results Immunostaining for Lyve1 (marker of differentiated LSECs) was reduced in Vcam1fl/fl mice and restored in Vcam1Δend mice in both NASH and liver fibrosis models. Co-immunostaining showed increased α-smooth muscle actin in the livers of Vcam1fl/fl mice in areas lacking Lyve1. Furthermore, scanning electron microscopy showed reduced LSEC fenestrae in the Vcam1fl/fl mice but not Vcam1Δend mice in both injury models, suggesting that VCAM1 promotes LSEC capillarization during liver injury. HSCs profibrogenic markers were reduced when cocultured with LSECs from CD-HFD fed Vcam1Δend mice compared to Vcam1fl/fl mice. Furthermore, recombinant VCAM1 activated the Yes-associated protein 1 pathway and induced a fibrogenic phenotype in HSCs in vitro, supporting the profibrogenic role of LSEC VCAM1. Conclusion VCAM1 is not just a scaffold for leukocyte adhesion during liver injury, but also a modulator of LSEC capillarization and liver fibrosis.
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Affiliation(s)
- Qianqian Guo
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Kunimaro Furuta
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shahidul Islam
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Nunzia Caporarello
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, United States
| | - Enis Kostallari
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Kobe Dielis
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Daniel J Tschumperlin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, United States
| | - Petra Hirsova
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Samar H Ibrahim
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States.,Division of Pediatric Gastroenterology, Mayo Clinic, Rochester, MN, United States
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Bakke FK, Gundappa MK, Matz H, Stead DA, Macqueen DJ, Dooley H. Exploration of the Nurse Shark ( Ginglymostoma cirratum) Plasma Immunoproteome Using High-Resolution LC-MS/MS. Front Immunol 2022; 13:873390. [PMID: 35734164 PMCID: PMC9207270 DOI: 10.3389/fimmu.2022.873390] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/04/2022] [Indexed: 11/29/2022] Open
Abstract
Many animals of scientific importance lack species-specific reagents (e.g., monoclonal antibodies) for in-depth studies of immune proteins. Mass spectrometry (MS)-based proteomics has emerged as a useful method for monitoring changes in protein abundance and modifications in non-model species. It can be used to quantify hundreds of candidate immune molecules simultaneously without the generation of new reagents. Here, we used MS-based proteomics to identify and quantify candidate immune proteins in the plasma of the nurse shark (Ginglymostoma cirratum), a cartilaginous fish and representative of the most basal extant vertebrate lineage with an immunoglobulin-based immune system. Mass spectrometry-based LC-MS/MS was performed on the blood plasma of nurse sharks immunized with human serum albumin (n=4) or sham immunized (n=1), and sampled at days 0 (baseline control), 1, 2, 3, 5, 7, 14, 21, 28, 25, 42 and 49. An antigen-specific antibody response was experimentally confirmed post-immunization. To provide a high-quality reference to identify proteins, we assembled and annotated a multi-tissue de novo transcriptome integrating long- and short-read sequence data. This comprised 62,682 contigs containing open reading frames (ORFs) with a length >80 amino acids. Using this transcriptome, we reliably identified 626 plasma proteins which were broadly categorized into coagulation, immune, and metabolic functional groups. To assess the feasibility of performing LC-MS/MS proteomics in nurse shark in the absence of species-specific protein annotations, we compared the results to an alternative strategy, mapping peptides to proteins predicted in the genome assembly of a related species, the whale shark (Rhincodon typus). This approach reliably identified 297 proteins, indicating that useful data on the plasma proteome may be obtained in many instances despite the absence of a species-specific reference protein database. Among the plasma proteins defined against the nurse shark transcriptome, fifteen showed consistent changes in abundance across the immunized shark individuals, indicating a role in the immune response. These included alpha-2-macroglobulin (A2M) and a novel protein yet to be characterized in diverse vertebrate lineages. Overall, this study enhances genetic and protein-level resources for nurse shark research and vastly improves our understanding of the elasmobranch plasma proteome, including its remodelling following immune stimulation.
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Affiliation(s)
- Fiona K. Bakke
- School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Manu Kumar Gundappa
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Hanover Matz
- Department of Microbiology and Immunology, Institute of Marine and Environmental Technology (IMET), University of Maryland School of Medicine, Baltimore, MD, United States
| | - David A. Stead
- Aberdeen Proteomics, The Rowett Institute, University of Aberdeen, Aberdeen, United Kingdom
| | - Daniel J. Macqueen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Helen Dooley
- Department of Microbiology and Immunology, Institute of Marine and Environmental Technology (IMET), University of Maryland School of Medicine, Baltimore, MD, United States
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Achudhan D, Li-Yun Chang S, Liu SC, Lin YY, Huang WC, Wu YC, Huang CC, Tsai CH, Ko CY, Kuo YH, Tang CH. Antcin K inhibits VCAM-1-dependent monocyte adhesion in human rheumatoid arthritis synovial fibroblasts. FOOD & NUTRITION RESEARCH 2022; 66:8645. [PMID: 35783555 PMCID: PMC9210827 DOI: 10.29219/fnr.v66.8645] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/14/2022] [Accepted: 04/14/2022] [Indexed: 12/23/2022]
Affiliation(s)
- David Achudhan
- Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taichung, Taiwan
| | - Sunny Li-Yun Chang
- Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taichung, Taiwan
| | - Shan-Chi Liu
- Department of Medical Education and Research, China Medical University Beigang Hospital, Yunlin, Taiwan
| | - Yen-You Lin
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Wei-Chien Huang
- Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taichung, Taiwan
| | - Yang-Chang Wu
- Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taichung, Taiwan
- Chinese Medicine Research and Development Center, Center for Molecular Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
- Department of Biotechnology, College of Medical and Health Science, Asia University, Taichung, Taiwan
| | - Chien-Chung Huang
- School of Medicine, China Medical University, Taichung, Taiwan
- Division of Immunology and Rheumatology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Chun-Hao Tsai
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung, Taiwan
- Department of Orthopedic Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Chih-Yuan Ko
- Department of Orthopedic Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Yueh-Hsiung Kuo
- Department of Biotechnology, College of Medical and Health Science, Asia University, Taichung, Taiwan
- Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung, Taiwan
- Chinese Medicine Research Center, China Medical University, Taichung, Taiwan
- Yueh-Hsiung Kuo, Institute: Tsuzuki Institute for Traditional Medicine Address: 91, Hsueh-Shih Road, Taichung,404, Taiwan, Republic of China. . Tel: 886-4-22053366 ext 5701, 5709
| | - Chih-Hsin Tang
- Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taichung, Taiwan
- School of Medicine, China Medical University, Taichung, Taiwan
- Department of Biotechnology, College of Medical and Health Science, Asia University, Taichung, Taiwan
- Chinese Medicine Research Center, China Medical University, Taichung, Taiwan
- Chih-Hsin Tang, Institute: Department of Pharmacology, School of Medicine, China Medical University Address: #91, Hsueh-Shih Road, Taichung city 40402, Taiwan. E-mail: . Tel: +886-4-22053366#7726
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Tout I, Miossec P. The role of B cells and their interactions with stromal cells in the context of inflammatory autoimmune diseases. Clin Exp Rheumatol 2022; 21:103098. [PMID: 35417796 DOI: 10.1016/j.autrev.2022.103098] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/08/2022] [Indexed: 02/07/2023]
Abstract
Interactions between B cells and stromal cells have essential functions in immune cell development and responses. During chronic inflammation, the pro-inflammatory microenvironment leads to changes in stromal cells, which acquire a pathogenic phenotype specific to each organ and disease. B cells are recruited to the site of inflammation and interact with these pathogenic stromal cells contributing to the disease's severity. In addition to producing autoantibodies, B cells contribute to the pathogenesis of autoimmune inflammatory diseases by serving as professional antigen-presenting cells, producing cytokines, and through additional mechanisms. This review describes the role of B cells and their interactions with stromal cells in chronic inflammation, with a focus on human disease, using three selected autoimmune inflammatory diseases: rheumatoid arthritis, systemic lupus erythematosus and multiple sclerosis. Understanding B cells roles and their interaction with stromal cells will help develop new therapeutic options for the treatment of autoimmune diseases.
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Affiliation(s)
- Issam Tout
- Department of Clinical Immunology and Rheumatology, Immunogenomics and Inflammation Research Unit, University of Lyon, Hospices Civils de Lyon, Edouard Herriot Hospital, 5 Place d'Arsonval, 69437 Lyon, France
| | - Pierre Miossec
- Department of Clinical Immunology and Rheumatology, Immunogenomics and Inflammation Research Unit, University of Lyon, Hospices Civils de Lyon, Edouard Herriot Hospital, 5 Place d'Arsonval, 69437 Lyon, France.
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9
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Malfunctioning CD106-positive, short-term hematopoietic stem cells trigger diabetic neuropathy in mice by cell fusion. Commun Biol 2021; 4:575. [PMID: 33990693 PMCID: PMC8121918 DOI: 10.1038/s42003-021-02082-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 03/25/2021] [Indexed: 12/16/2022] Open
Abstract
Diabetic neuropathy is an incurable disease. We previously identified a mechanism by which aberrant bone marrow-derived cells (BMDCs) pathologically expressing proinsulin/TNF-α fuse with residential neurons to impair neuronal function. Here, we show that CD106-positive cells represent a significant fraction of short-term hematopoietic stem cells (ST-HSCs) that contribute to the development of diabetic neuropathy in mice. The important role for these cells is supported by the fact that transplantation of either whole HSCs or CD106-positive ST-HSCs from diabetic mice to non-diabetic mice produces diabetic neuronal dysfunction in the recipient mice via cell fusion. Furthermore, we show that transient episodic hyperglycemia produced by glucose injections leads to abnormal fusion of pathological ST-HSCs with residential neurons, reproducing neuropathy in nondiabetic mice. In conclusion, we have identified hyperglycemia-induced aberrant CD106-positive ST-HSCs underlie the development of diabetic neuropathy. Aberrant CD106-positive ST-HSCs constitute a novel therapeutic target for the treatment of diabetic neuropathy. Katagi et al. show that abnormal bone marrow-derived cells originated from hematopoietic stem cells (CD106-positive short-term HSCs) aberrantly fuse with neurons to develop diabetic neuropathy. This study suggests that the pathological abnormality is memorized in the bone marrow and that it cannot be erased by conventional therapy.
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10
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Furuta K, Guo Q, Pavelko KD, Lee JH, Robertson KD, Nakao Y, Melek J, Shah VH, Hirsova P, Ibrahim SH. Lipid-induced endothelial vascular cell adhesion molecule 1 promotes nonalcoholic steatohepatitis pathogenesis. J Clin Invest 2021; 131:143690. [PMID: 33476308 PMCID: PMC7954604 DOI: 10.1172/jci143690] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 01/14/2021] [Indexed: 02/06/2023] Open
Abstract
Monocyte homing to the liver and adhesion to the liver sinusoidal endothelial cells (LSECs) are key elements in nonalcoholic steatohepatitis (NASH) pathogenesis. We reported previously that VCAM-1 mediates monocyte adhesion to LSECs. However, the pathogenic role of VCAM-1 in NASH is unclear. Herein, we report that VCAM-1 was a top upregulated adhesion molecule in the NASH mouse liver transcriptome. Open chromatin landscape profiling combined with genome-wide transcriptome analysis showed robust transcriptional upregulation of LSEC VCAM-1 in murine NASH. Moreover, LSEC VCAM-1 expression was significantly increased in human NASH. LSEC VCAM-1 expression was upregulated by palmitate treatment in vitro and reduced with inhibition of the mitogen-activated protein 3 kinase (MAP3K) mixed lineage kinase 3 (MLK3). Likewise, LSEC VCAM-1 expression was reduced in the Mlk3-/- mice with diet-induced NASH. Furthermore, VCAM-1 neutralizing Ab or pharmacological inhibition attenuated diet-induced NASH in mice, mainly via reducing the proinflammatory monocyte hepatic population as examined by mass cytometry by time of flight (CyTOF). Moreover, endothelium-specific Vcam1 knockout mice were also protected against NASH. In summary, lipotoxic stress enhances the expression of LSEC VCAM-1, in part, through MLK3 signaling. Inhibition of VCAM-1 was salutary in murine NASH and might serve as a potential therapeutic strategy for human NASH.
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Affiliation(s)
| | | | | | - Jeong-Heon Lee
- Division of Experimental Pathology and Laboratory Medicine, Department of Laboratory Medicine and Pathology, and
| | - Keith D Robertson
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Jan Melek
- Department of Pediatrics, Charles University in Prague, Faculty of Medicine in Hradec Králové, University Hospital Hradec Králové, Czechia
| | | | | | - Samar H Ibrahim
- Division of Gastroenterology and Hepatology.,Division of Pediatric Gastroenterology, Mayo Clinic, Rochester, Minnesota, USA
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11
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Carr RM. VCAM-1: closing the gap between lipotoxicity and endothelial dysfunction in nonalcoholic steatohepatitis. J Clin Invest 2021; 131:147556. [PMID: 33720049 DOI: 10.1172/jci147556] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) results in the accumulation of fat in the liver and can progress as an inflammatory disorder with considerable vascular endothelial dysfunction known as nonalcoholic steatohepatitis (NASH). Inflammatory signals can trigger the expression of vascular cell adhesion molecule 1 (VCAM-1) on endothelial cells. VCAM-1 is a surface protein that induces adherence and extravasation of monocytes to blood vessels. In this issue of the JCI, Furuta et al. report on their sequencing of RNA transcripts from the livers of mice fed a NASH-inducing diet. VCAM-1 was upregulated in the whole liver as well as liver sinusoidal endothelial cells (LSECs). When the researchers incubated LSECs with palmitate, a toxic lipid, VCAM-1 was upregulated. Notably, inhibiting VCAM-1 in the NASH model reduced VCAM-1 expression, lessened infiltrating macrophages, and mitigated fibrosis. This study connects steatosis to endothelial dysfunction and inflammation and suggests that targeting VCAM-1 may address fibrosis in patients with NASH.
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da Rosa Franchi Santos LF, Costa NT, Maes M, Simão ANC, Dichi I. Influence of treatments on cell adhesion molecules in patients with systemic lupus erythematosus and rheumatoid arthritis: a review. Inflammopharmacology 2019; 28:363-384. [DOI: 10.1007/s10787-019-00674-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/23/2019] [Indexed: 12/16/2022]
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Kong DH, Kim YK, Kim MR, Jang JH, Lee S. Emerging Roles of Vascular Cell Adhesion Molecule-1 (VCAM-1) in Immunological Disorders and Cancer. Int J Mol Sci 2018; 19:ijms19041057. [PMID: 29614819 PMCID: PMC5979609 DOI: 10.3390/ijms19041057] [Citation(s) in RCA: 356] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 03/30/2018] [Accepted: 03/31/2018] [Indexed: 12/12/2022] Open
Abstract
Tumor necrosis factor alpha (TNFα) is a pro-inflammatory cytokine that triggers the expression of inflammatory molecules, including other cytokines and cell adhesion molecules. TNFα induces the expression of intercellular cell adhesion molecule-1 and vascular cell adhesion molecule-1 (VCAM-1). VCAM-1 was originally identified as a cell adhesion molecule that helps regulate inflammation-associated vascular adhesion and the transendothelial migration of leukocytes, such as macrophages and T cells. Recent evidence suggests that VCAM-1 is closely associated with the progression of various immunological disorders, including rheumatoid arthritis, asthma, transplant rejection, and cancer. This review covers the role and relevance of VCAM-1 in inflammation, and also highlights the emerging potential of VCAM-1 as a novel therapeutic target in immunological disorders and cancer.
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Affiliation(s)
- Deok-Hoon Kong
- Research Center, Scripps Korea Antibody Institute, Chuncheon 200-701, Korea.
| | - Young Kwan Kim
- Research Center, Scripps Korea Antibody Institute, Chuncheon 200-701, Korea.
| | - Mi Ra Kim
- Research Center, Scripps Korea Antibody Institute, Chuncheon 200-701, Korea.
| | - Ji Hye Jang
- Research Center, Scripps Korea Antibody Institute, Chuncheon 200-701, Korea.
| | - Sukmook Lee
- Research Center, Scripps Korea Antibody Institute, Chuncheon 200-701, Korea.
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Ig-like domain 6 of VCAM-1 is a potential therapeutic target in TNFα-induced angiogenesis. Exp Mol Med 2017; 49:e294. [PMID: 28209985 PMCID: PMC5336558 DOI: 10.1038/emm.2016.147] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 10/07/2016] [Accepted: 10/14/2016] [Indexed: 01/05/2023] Open
Abstract
Tumor necrosis factor alpha (TNFα)-induced angiogenesis plays important roles in the progression of various diseases, including cancer, wet age-related macular degeneration, and rheumatoid arthritis. However, the relevance and role of vascular cell adhesion molecule-1 (VCAM-1) in angiogenesis have not yet been clearly elucidated. In this study, VCAM-1 knockdown shows VCAM-1 involvement in TNFα-induced angiogenesis. Through competitive blocking experiments with VCAM-1 Ig-like domain 6 (VCAM-1-D6) protein, we identified VCAM-1-D6 as a key domain regulating TNFα-induced vascular tube formation. We demonstrated that a monoclonal antibody specific to VCAM-1-D6 suppressed TNFα-induced endothelial cell migration and tube formation and TNFα-induced vessel sprouting in rat aortas. We also found that the antibody insignificantly affected endothelial cell viability, morphology and activation. Finally, the antibody specifically blocked VCAM-1-mediated cell–cell contacts by directly inhibiting VCAM-1-D6-mediated interaction between VCAM-1 molecules. These findings suggest that VCAM-1-D6 may be a potential novel therapeutic target in TNFα-induced angiogenesis and that antibody-based modulation of VCAM-1-D6 may be an effective strategy to suppress TNFα-induced angiogenesis.
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Effect of Wenhua Juanbi Recipe () on expression of receptor activator of nuclear factor kappa B ligand, osteoprotegerin, and tumor necrosis factor receptor superfamily member 14 in rats with collagen-induced arthritis. Chin J Integr Med 2016; 23:208-214. [PMID: 28004300 DOI: 10.1007/s11655-016-2532-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To study the effect of Wenhua Juanbi Recipe (, WJR) on expression of receptor activator of nuclear factor kappa B ligand (RANKL), osteoprotegerin (OPG), and tumor necrosis factor receptor superfamily member 14 (TNFRSF14, also known as LIGHT) in rats with collagen-induced arthritis (CIA). METHODS CIA rats were generated by subcutaneous injection of bovine collagen type-II at the tail base. Sixty CIA rats were randomly assigned (10 animals/group) to: model, methotrexate (MTX)-treated (0.78 mg/kg body weight), and WJR-treated (22.9 g/kg) groups. Healthy normal rats (n=10) were used as the normal control. Treatments or saline were administered once daily by oral gavage. Rats were sacrifificed at day 28 post-treatment and knee synovium and peripheral blood serum were collected. Toe swelling degree and expression of RANKL, OPG, and LIGHT were determined by Western blot and immunohistochemistry. RESULTS Compared with the normal group, toe swelling degree was signifificantly increased in the model group (P<0.01). After treatment, toe swelling degree decreased signifificantly in the WJR and MTX groups compared with the model group (P<0.01). Compared with the normal group, expression of RANKL and LIGHT were signifificantly increased and OPG signifificantly decreased in peripheral blood and synovium of the model group (P<0.01). Conversely, RANKL and LIGHT expression were signifificantly reduced and OPG increased in the WJR and MTX groups compared with the model group (P<0.01). No statistically significant difference existed between WJR and MTX groups. CONCLUSION WJR likely acts by reducing RANKL expression and increasing OPG expression, thus inhibiting RANKL/RANK interaction and reducing LIGHT expression, thereby inhibiting osteoclast formation/activation to block bone erosion.
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Huang D, Zhao Q, Liu H, Guo Y, Xu H. PPAR-α Agonist WY-14643 Inhibits LPS-Induced Inflammation in Synovial Fibroblasts via NF-kB Pathway. J Mol Neurosci 2016; 59:544-53. [PMID: 27339772 DOI: 10.1007/s12031-016-0775-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 05/26/2016] [Indexed: 11/28/2022]
Abstract
Osteoarthritis (OA), the most prevalent form of arthritis that results from breakdown of joint cartilage and underlying bone, has been viewed as a chronic condition manifested by persistence of inflammatory responses and infiltration of lymphocytes. Regulation of the inflammatory responses in synovial fibroblasts might be useful to prevent the development and deterioration of osteoarthritis. WY-14643, a potent peroxisome proliferator activator receptor-α (PPAR-α) agonist, has been described to beneficially regulate inflammation in many mammalian cells. Here, we investigate the potential anti-inflammatory role of WY-14643 in lipopolysaccharide (LPS)-induced synovial fibroblasts. WY-14643 greatly inhibited the production of NO and PGE2 induced by LPS. In addition, the mRNA expression of intracellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), endothelin-1 (ET-1), and tissue factor (TF) was significantly suppressed by WY-14643, as well as the secretion of pro-inflammatory cytokines including interleukin-6 (IL-6), IL-1β, tumor necrosis factor-α (TNF-α), and monocyte chemotactic protein-1 (MCP-1). Furthermore, the transcription activity and nuclear translocation of NF-kB were found to be markedly decreased by WY-14643, while the phosphorylation of IkB was enhanced, indicating that the anti-inflammatory role of WY-14643 was meditated by NF-kB-dependent pathway. The application of WY-14643 failed to carry out its anti-inflammatory function in PPAR-α silenced cells, suggesting the role of PPAR-α. These findings may facilitate further studies investigating the translation of pharmacological PPAR-α activation into clinical therapy of OA.
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Affiliation(s)
- Degang Huang
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui, People's Republic of China.
| | - Quanlai Zhao
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Hongfei Liu
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Yongjie Guo
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui, People's Republic of China
| | - Hongguang Xu
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui, People's Republic of China.
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Hoeven TA, Kavousi M, Ikram MA, van Meurs JB, Bindels PJ, Hofman A, Franco OH, Bierma-Zeinstra SM. Markers of atherosclerosis in relation to presence and progression of knee osteoarthritis: a population-based cohort study. Rheumatology (Oxford) 2015; 54:1692-8. [DOI: 10.1093/rheumatology/kev106] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Indexed: 11/12/2022] Open
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Alapati A, Deosarkar SP, Lanier OL, Qi C, Carlson GE, Burdick MM, Schwartz FL, McCall KD, Bergmeier SC, Goetz DJ. Simple modifications to methimazole that enhance its inhibitory effect on tumor necrosis factor-α-induced vascular cell adhesion molecule-1 expression by human endothelial cells. Eur J Pharmacol 2015; 751:59-66. [PMID: 25641748 PMCID: PMC5019189 DOI: 10.1016/j.ejphar.2015.01.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 01/14/2015] [Accepted: 01/19/2015] [Indexed: 12/31/2022]
Abstract
The expression of vascular cell adhesion molecule-1 (VCAM-1) on the vascular endothelium can be increased by pro-inflammatory cytokines [e.g. tumor necrosis factor-α (TNF-α)]. VCAM-1 contributes to leukocyte adhesion to, and emigration from, the vasculature which is a key aspect of pathological inflammation. As such, a promising therapeutic approach for pathological inflammation is to inhibit the expression of VCAM-1. Methimazole [3-methyl-1, 3 imidazole-2 thione (MMI)] is routinely used for the treatment of Graves׳ disease and patients treated with MMI have decreased levels of circulating VCAM-1. In this study we used cultured human umbilical vein endothelial cells (HUVEC) to investigate the effect of MMI structural modifications on TNF-α induced VCAM-1 expression. We found that addition of a phenyl ring at the 4-nitrogen of MMI yields a compound that is significantly more potent than MMI at inhibiting 24h TNF-α-induced VCAM-1 protein expression. Addition of a para methoxy to the appended phenyl group increases the inhibition while substitution of a thiazole ring for an imidazole ring in the phenyl derivatives yields no clear difference in inhibition. Addition of the phenyl ring to MMI appears to increase toxicity as does substitution of a thiazole ring for an imidazole ring in the phenyl MMI derivatives. Each of the compounds reduced TNF-α-induced VCAM-1 mRNA expression and had a functional inhibitory effect, i.e. each inhibited monocytic cell adhesion to 24h TNF-α-activated HUVEC under fluid flow conditions. Combined, these studies provide important insights into the design of MMI-related anti-inflammatory compounds.
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Affiliation(s)
- Anuja Alapati
- Biomedical Engineering Program, Ohio University, Athens, OH 45701, USA; Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
| | | | - Olivia L Lanier
- Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
| | - Chunyan Qi
- Biomedical Engineering Program, Ohio University, Athens, OH 45701, USA; Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
| | - Grady E Carlson
- Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
| | - Monica M Burdick
- Biomedical Engineering Program, Ohio University, Athens, OH 45701, USA; Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
| | - Frank L Schwartz
- Department of Specialty Medicine, Ohio University, Athens, OH 45701, USA
| | - Kelly D McCall
- Biomedical Engineering Program, Ohio University, Athens, OH 45701, USA; Department of Specialty Medicine, Ohio University, Athens, OH 45701, USA
| | - Stephen C Bergmeier
- Biomedical Engineering Program, Ohio University, Athens, OH 45701, USA; Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA
| | - Douglas J Goetz
- Biomedical Engineering Program, Ohio University, Athens, OH 45701, USA; Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
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Chi PL, Chuang YC, Chen YW, Lin CC, Hsiao LD, Yang CM. The CO donor CORM-2 inhibits LPS-induced vascular cell adhesion molecule-1 expression and leukocyte adhesion in human rheumatoid synovial fibroblasts. Br J Pharmacol 2015; 171:2993-3009. [PMID: 24628691 DOI: 10.1111/bph.12680] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 12/15/2013] [Accepted: 12/24/2013] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND AND PURPOSE Infection with Gram-negative bacteria has been recognized as an initiator of rheumatoid arthritis, which is characterized by chronic inflammation and infiltration of immune cells. Carbon monoxide (CO) exhibits anti-inflammatory properties. Here we have investigated the detailed mechanisms of vascular cell adhesion molecule-1 (VCAM-1) expression induced by LPS and if CO inhibited LPS-induced leukocyte adhesion to synovial fibroblasts by suppressing VCAM-1 expression. EXPERIMENTAL APPROACH Human rheumatoid arthritis synovial fibroblasts (RASFs) were incubated with LPS and/or the CO-releasing compound CORM-2. Effects of LPS on VCAM-1 levels were determined by analysing mRNA expression, promoter activity, protein expression, and immunohistochemical staining. The molecular mechanisms were investigated by determining the expression, activation, and binding activity of transcriptional factors using target signal antagonists. KEY RESULTS CORM-2 significantly inhibited inflammatory responses in LPS-treated RASFs by down-regulating the expression of adhesion molecule VCAM-1 and leukocyte infiltration. The down-regulation of LPS-induced VCAM-1 expression involved inhibition of the expression of phosphorylated-NF-κB p65 and AP-1 (p-c-Jun, c-Jun and c-Fos mRNA levels). These results were confirmed by chromatin immunoprecipitation assay to detect NF-κB and AP-1 DNA binding activity. CONCLUSIONS AND IMPLICATIONS LPS-mediated formation of the TLR4/MyD88/TRAF6/c-Src complex regulated NF-κB and MAPKs/AP-1 activation leading to VCAM-1 expression and leukocyte adhesion. CORM-2, which liberates CO to elicit direct biological activities, attenuated LPS-induced VCAM-1 expression by interfering with NF-κB and AP-1 activation, and significantly reduced LPS-induced immune cell infiltration of the synovium.
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Affiliation(s)
- Pei-Ling Chi
- Department of Physiology and Pharmacology and Health Ageing Research Center, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan
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Abstract
Photoaffinity labeling (PAL) using a chemical probe to covalently bind its target in response to activation by light has become a frequently used tool in drug discovery for identifying new drug targets and molecular interactions, and for probing the location and structure of binding sites. Methods to identify the specific target proteins of hit molecules from phenotypic screens are highly valuable in early drug discovery. In this review, we summarize the principles of PAL including probe design and experimental techniques for in vitro and live cell investigations. We emphasize the need to optimize and validate probes and highlight examples of the successful application of PAL across multiple disease areas.
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Affiliation(s)
- Ewan Smith
- Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey, SM2 5NG, London, UK
| | - Ian Collins
- Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey, SM2 5NG, London, UK
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21
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Yu JM, Wang YQ, Liu XD, Qu PS, Tao F, Guo QG. Effect of qubi zhentong recipe on synovial gene expression in collagen-induced arthritis in rats. Chin J Integr Med 2013; 19:749-54. [PMID: 23975163 DOI: 10.1007/s11655-013-1590-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the effect of the Chinese medical formula Qubi Zhentong Recipe(, QZR) on the synovial gene expression profile in collagen-induced arthritis (CIA) rats. METHODS Ten rats were randomly chosen from 60 rats as the control group, and the other 50 rats were used for the CIA models. The CIA model group was constructed by bovine injection of type II collagen through the rats' neck and tail. Twenty rats were randomly chosen from 34 successful CIA models and randomly assigned into two groups: the model group (n =10) and the QZR group (n=10). The QZR group was fed intragastrically with QZR 22.9 g/(kg·d) (10 times the clinical adult dose), and the CIA model group was given the same dose of normal saline. Both model and QZR groups were administered treatment once a day. Total RNA was collected from the knee joint synovium after 30 days. The change in gene expression profile was analyzed by a whole gene chip. RESULTS A total of 76 genes showed a difference in expression between CIA model group and the control group; 35 genes were down-regulated and 41 were up-regulated. A total of 67 genes showed a difference in expression between the model group and the QZR group; 48 genes were down-regulated and 19 were upregulated. CONCLUSIONS QZR may affect CIA by stimulating multiple genes and targets, which are related to oncogenes, apoptosis, metabolism, the immune system, ion channels, and transport proteins.
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Affiliation(s)
- Jian-ming Yu
- Department of Arthropathy, Zhejiang Provincial Hospital of Integrated Traditional and Western Medicine, Hangzhou, 310003, China,
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22
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Ahmed S, Riegsecker S, Beamer M, Rahman A, Bellini JV, Bhansali P, Tillekeratne LMV. Largazole, a class I histone deacetylase inhibitor, enhances TNF-α-induced ICAM-1 and VCAM-1 expression in rheumatoid arthritis synovial fibroblasts. Toxicol Appl Pharmacol 2013; 270:87-96. [PMID: 23632129 DOI: 10.1016/j.taap.2013.04.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 04/18/2013] [Accepted: 04/19/2013] [Indexed: 11/24/2022]
Abstract
In the present study, we evaluated the effect of largazole (LAR), a marine-derived class I HDAC inhibitor, on tumor necrosis factor-α (TNF-α)-induced expression of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1), and matrix metalloproteinase-2 (MMP-2) activity. LAR (1-5 μM) had no adverse effect on the viability of RA synovial fibroblasts. Among the different class I HDACs screened, LAR (0.5-5 μM) inhibited the constitutive expression of HDAC1 (0-30%). Surprisingly, LAR increased class II HDAC [HDAC6] by ~220% with a concomitant decrease in HDAC5 [30-58%] expression in RA synovial fibroblasts. SAHA (5 μM), a pan-HDAC inhibitor, also induced HDAC6 expression in RA synovial fibroblasts. Pretreatment of RA synovial fibroblasts with LAR further enhanced TNF-α-induced ICAM-1 and VCAM-1 expression. However, LAR inhibited TNF-α-induced MMP-2 activity in RA synovial fibroblasts by 35% when compared to the TNF-α-treated group. Further, the addition of HDAC6 specific inhibitor Tubastatin A with LAR suppressed TNF-α+LAR-induced ICAM-1 and VCAM-1 expression and completely blocked MMP-2 activity, suggesting a role of HDAC6 in LAR-induced ICAM-1 and VCAM-1 expression. LAR also enhanced TNF-α-induced phospho-p38 and phospho-AKT expression, but inhibited the expression of phospho-JNK and nuclear translocation of NF-κBp65 in RA synovial fibroblasts. These results suggest that LAR activates p38 and Akt pathways and influences class II HDACs, in particular HDAC6, to enhance some of the detrimental effects of TNF-α in RA synovial fibroblasts. Understanding the exact role of different HDAC isoenzymes in RA pathogenesis is extremely important in order to develop highly effective HDAC inhibitors for the treatment of RA.
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Affiliation(s)
- Salahuddin Ahmed
- Department of Pharmacology, College of Pharmacy & Pharmaceutical Sciences, The University of Toledo, Health Science Campus, Toledo, OH 43614, USA.
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Nell-Duxneuner V, Axmann R, Husar-Memmer E, Dallos T, Datz C, Stadlmayr A, Aigner E, Englbrecht M, Schett G, Zwerina J. VCAM-1 serum levels are associated with arthropathy in hereditary haemochromatosis. Ann Rheum Dis 2013; 72:2006-10. [PMID: 23599437 DOI: 10.1136/annrheumdis-2012-202800] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES The aim of this study was to assess the role of vascular adhesion molecule 1 (VCAM-1) in patients with hereditary haemochromatosis (HH) with or without arthropathy. METHODS Sera from a large cross-sectional cohort of unselected HH patients (n=147) were obtained and compared to an age-matched and sex-matched control group. Serum levels of VCAM-1 were measured by ELISA and were correlated with clinical measures. RESULTS VCAM-1 serum levels were elevated in HH patients as compared to matched controls (mean 913±456 vs 654±451 ng/ml, p<0.0001). Within the HH patient group, VCAM-1 levels were much higher in patients with arthropathy and joint replacement surgery. VCAM-1 levels correlated well with radiographic measures of HH arthropathy (r=0.36, p<0.0001). Multivariate regression analysis confirmed a highly significant association of VCAM-1 serum levels and the presence of HH arthropathy, independent from diabetes, body mass index and age. CONCLUSIONS VCAM-1 serum levels emerge as a biomarker for haemochromatosis arthropathy.
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Affiliation(s)
- Valerie Nell-Duxneuner
- 1st Medical Department, Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of WGKK and AUVA Trauma Centre Meidling, Hanusch Hospital, , Vienna, Austria
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Lee S, Yoon IH, Yoon A, Cook-Mills JM, Park CG, Chung J. An antibody to the sixth Ig-like domain of VCAM-1 inhibits leukocyte transendothelial migration without affecting adhesion. THE JOURNAL OF IMMUNOLOGY 2012; 189:4592-601. [PMID: 23028056 DOI: 10.4049/jimmunol.1103803] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
VCAM-1 plays a key role in leukocyte trafficking during inflammatory responses. However, molecular mechanisms underlying this function have not been clearly elucidated. In this study, using phage display technology, we developed a rabbit/human chimeric VCAM-1 Ab, termed VCAM-1 domain 6 (VCAM-1-D6), which specifically recognizes aa 511-599 within the sixth Ig-like domain. We report that the VCAM-1-D6 Ab blocked U937 cell transmigration across activated HUVECs but did not alter adhesion of U937 cells to the HUVECs. We also demonstrate that VCAM-1-D6 does not alter TNF-α-stimulated endothelial cell chemokine or cytokine production. Furthermore, through in vivo efficacy testing using a mouse islet allograft model, we demonstrate that VCAM-1-D6 significantly alleviates allograft rejection by blocking leukocyte infiltration to the grafted islets. Taken together, our results suggest that the VCAM-1-D6 Ab may block VCAM-1-mediated inflammation and could be a useful tool in treating inflammatory diseases.
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Affiliation(s)
- Sukmook Lee
- Cancer Research Institute, Xenotransplantation Research Center, College of Medicine, Seoul National University, Seoul 110-799, Korea
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Site-specific targeting of antibody activity in vivo mediated by disease-associated proteases. J Control Release 2012; 161:804-12. [PMID: 22634092 DOI: 10.1016/j.jconrel.2012.05.035] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 05/12/2012] [Accepted: 05/17/2012] [Indexed: 01/19/2023]
Abstract
As a general strategy to selectively target antibody activity in vivo, a molecular architecture was designed to render binding activity dependent upon proteases in disease tissues. A protease-activated antibody (pro-antibody) targeting vascular cell adhesion molecule 1 (VCAM-1), a marker of atherosclerotic plaques, was constructed by tethering a binding site-masking peptide to the antibody via a matrix metalloprotease (MMP) susceptible linker. Pro-antibody activation in vitro by MMP-1 yielded a 200-fold increase in binding affinity and restored anti-VCAM-1 binding in tissue sections from ApoE⁻/⁻ mice ex vivo. The pro-antibody was efficiently activated by native proteases in aorta tissue extracts from ApoE⁻/⁻, but not from normal mice, and accumulated in aortic plaques in vivo with enhanced selectivity when compared to the unmodified antibody. Pro-antibody accumulation in aortic plaques was MMP-dependent, and significantly inhibited by a broad-spectrum MMP inhibitor. These results demonstrate that the activity of disease-associated proteases can be exploited to site-specifically target antibody activity in vivo.
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Liu XD, Chen Y, Liu FY, Ye LH, Cai L. Effect of Wenhua Juanbi recipe on proliferation and apoptosis of synoviocytes in rats with collagen-inducing arthritis. Chin J Integr Med 2011; 19:453-8. [PMID: 21717160 DOI: 10.1007/s11655-011-0753-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To study the effect of Wenhua Juanbi Recipe (WJR) on proliferation and apoptosis of synoviocytes in rats with collagen-inducing arthritis (CIA). METHODS A CIA model was induced by intradermal injection of bovine collagen type II emulsion at the base of rat tails. Thirty modeled healthy Wistar rats were randomly assigned to one of three groups (10 per group): the model group, the methotrexate (MTX)-treated group (0.78 mg/kg) and the WJR-treated group (22.9 g/kg). A group of 10 healthy rats was used as normal control. Treatments or normal saline for the control group were administered by oral gavage once daily. Rats were sacrificed after 30-day treatment and subjected to the following examinations: arthritis index (AI) was estimated, inflammatory cell infiltration and proliferation in synovial membrane were evaluated by microscopy, the synoviocyte apoptosis was determined by TUNEL assay, and the cell apoptosis index was calculated. RESULTS AI was lowered significantly in the WJR group compared to the model group (P<0.01). The pathological findings observed in the model group were reversed in the WJR group, including increase in inflammatory cell infiltration and synoviocyte proliferation in synovial membrane and reduction in cell apoptosis index (all P<0.01). CONCLUSIONS Synoviocyte proliferation and apoptosis reduction were present in CIA rats. WJR was effective in treating the rat model of CIA. The therapeutic effect might be exerted through inducing apoptosis and suppressing proliferation of synoviocytes.
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Affiliation(s)
- Xi-de Liu
- Department of Arthropathy, Zhejiang Provincial Hospital of Integrated Traditional and Western Medicine, Hangzhou, China.
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Jun MS, Ha YM, Kim HS, Jang HJ, Kim YM, Lee YS, Kim HJ, Seo HG, Lee JH, Lee SH, Chang KC. Anti-inflammatory action of methanol extract of Carthamus tinctorius involves in heme oxygenase-1 induction. JOURNAL OF ETHNOPHARMACOLOGY 2011; 133:524-530. [PMID: 20969944 DOI: 10.1016/j.jep.2010.10.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 10/05/2010] [Accepted: 10/13/2010] [Indexed: 05/30/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The methanol extracts of Carthamus tinctorius (MEC) have long been used in traditional medicine as anti-inflammatory agent, however, the molecular mechanism by which MEC shows anti-inflammatory action is not investigated. AIM OF THE STUDY Induction of heme oxygenase-1 (HO-1) by many medicinal herbs has been reported excellent anti-inflammatory action. Thus, the aim of the study is to explore whether anti-inflammatory action of MEC is related with HO-1 induction in RAW 264.7 cells. MATERIALS AND METHODS The present study was designed to investigate as to MEC induces HO-1 expression so that it reduces inflammation by suppression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression in cells activated with lipopolysaccharide (LPS). RESULTS Expression of HO-1 protein by MEC in macrophages was increased in a concentration- and time-dependent manner. Treatment with MEC significantly inhibited upregulation of both iNOS and COX-2 in LPS-activated macrophages and consequently reduced production of NO and PGE(2), respectively. The reduced expression of iNOS and COX-2 by MEC was reversed by siHO-1 RNA transfection. In addition, NF-E2-related factor (Nrf2) was translocated from cytosol to nucleus by MEC. The binding of NF-κB as well as NF-κB luciferase activity was also significantly diminished by MEC. Finally, tumor necrosis factor (TNF)-α-mediated VCAM-1 expression in endothelial cell was significantly inhibited by MEC. CONCLUSIONS The present results show that MEC induces HO-1 expression via Nrf2 translocation and inhibits NF-κB activity, which may be responsible for anti-inflammatory action. Therefore, we propose that anti-inflammatory action of MEC involves at least HO-1 induction.
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Affiliation(s)
- Min Soo Jun
- Department of Pharmacology, School of Medicine, and Institute of Health Sciences, Gyeongsang National University, 92 Chilam-dong, Jinju 660-751, Republic of Korea
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The chemokine receptor CXCR2 ligand KC (CXCL1) mediates neutrophil recruitment and is critical for development of experimental Lyme arthritis and carditis. Infect Immun 2010; 78:4593-600. [PMID: 20823213 DOI: 10.1128/iai.00798-10] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Deletion of the chemokine receptor CXCR2 prevents the recruitment of neutrophils into tissues and subsequent development of experimental Lyme arthritis. Following footpad inoculation of Borrelia burgdorferi, the agent of Lyme disease, expression of the CXCR2 ligand KC (CXCL1) is highly upregulated in the joints of arthritis-susceptible mice and is likely to play an important role in the recruitment of neutrophils to the site of infection. To test this hypothesis, we infected C3H KC(-/-) mice with B. burgdorferi and followed the development of arthritis and carditis. Ankle swelling was significantly attenuated during the peak of arthritis in the KC(-/-) mice. Arthritis severity scores were significantly lower in the KC(-/-) mice on days 11 and 21 postinfection, with fewer neutrophils present in the inflammatory lesions. Cardiac lesions were also significantly decreased in KC(-/-) mice at day 21 postinfection. There were, however, no differences between C3H wild-type and KC(-/-) mice in spirochete clearance from tissues. Two other CXCR2 ligands, LIX (CXCL5) and MIP-2 (CXCL2), were not increased to compensate for the loss of KC, and the production of several innate cytokines was unaltered. These results demonstrate that KC plays a critical nonredundant role in the development of experimental Lyme arthritis and carditis via CXCR2-mediated recruitment of neutrophils into the site of infection.
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Wu CY, Chi PL, Hsieh HL, Luo SF, Yang CM. TLR4-dependent induction of vascular adhesion molecule-1 in rheumatoid arthritis synovial fibroblasts: Roles of cytosolic phospholipase A(2)alpha/cyclooxygenase-2. J Cell Physiol 2010; 223:480-91. [PMID: 20112284 DOI: 10.1002/jcp.22059] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Lipopolysaccharide (LPS)/Toll-like receptor 4 (TLR4)-mediated signaling pathways have caught the attention of strategies designed for rheumatoid arthritis (RA). In this study, we identified that cPLA(2)alpha acted as a modulator of LPS-induced VCAM-1 expression and THP-1 (human acute monocytic leukemia cell line) adherence. Treatment of RA synovial fibroblasts (RASFs) with LPS, a TLR4 agonist, promoted the VCAM-1 expression and THP-1 adherence which were decreased by pretreatment with a selective cytosolic phospholipase A(2) (cPLA(2)) inhibitor (AACOCF(3)), implying the involvement of cPLA(2)alpha in these responses. This notion was further confirmed by knockdown of cPLA(2)alpha expression by transfection with cPLA(2)alpha small interfering RNA (siRNA) leading to a decrease in VCAM-1 expression and THP-1 adherence induced by LPS. Subsequently, the LPS-stimulated cPLA(2)alpha phosphorylation was attenuated by pretreatment with a MEK1/2 inhibitor (U0126), suggesting that LPS-stimulated cPLA(2)alpha phosphorylation and activity are mediated through an ERK-dependent mechanism. Moreover, COX-2-derived PGE(2) production appeared to involve in LPS-induced VCAM-1 expression which was attenuated by pretreatment with selective COX-2 inhibitors (NS-398 and celecoxib), transfection with COX-2 siRNA, or PGE(2) receptor antagonists. In addition, pretreatment with ecosapentaenoic acid (EPA), a substrate competitor of arachidonic acid (AA), also blocked LPS-induced VCAM-1 mRNA and protein expression, and THP-1 adherence. Collectively, these results suggest that LPS-induced VCAM-1 expression and adhesion of THP-1 cells are mediated through the TLR4/ERK/cPLA(2)alpha phosphorylation and COX-2 expression/PGE(2) synthesis in RASFs.
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Affiliation(s)
- Cheng-Ying Wu
- Department of Physiology and Pharmacology, Chang Gung University, Kwei-San, Tao-Yuan, Taiwan
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30
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Ren G, Zhao X, Zhang L, Zhang J, L'Huillier A, Ling W, Roberts AI, Le AD, Shi S, Shao C, Shi Y. Inflammatory cytokine-induced intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 in mesenchymal stem cells are critical for immunosuppression. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2010; 184:2321-8. [PMID: 20130212 PMCID: PMC2881946 DOI: 10.4049/jimmunol.0902023] [Citation(s) in RCA: 469] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cell-cell adhesion mediated by ICAM-1 and VCAM-1 is critical for T cell activation and leukocyte recruitment to the inflammation site and, therefore, plays an important role in evoking effective immune responses. However, we found that ICAM-1 and VCAM-1 were critical for mesenchymal stem cell (MSC)-mediated immunosuppression. When MSCs were cocultured with T cells in the presence of T cell Ag receptor activation, they significantly upregulated the adhesive capability of T cells due to the increased expression of ICAM-1 and VCAM-1. By comparing the immunosuppressive effect of MSCs toward various subtypes of T cells and the expression of these adhesion molecules, we found that the greater expression of ICAM-1 and VCAM-1 by MSCs, the greater the immunosuppressive capacity that they exhibited. Furthermore, ICAM-1 and VCAM-1 were found to be inducible by the concomitant presence of IFN-gamma and inflammatory cytokines (TNF-alpha or IL-1). Finally, MSC-mediated immunosuppression was significantly reversed in vitro and in vivo when the adhesion molecules were genetically deleted or functionally blocked, which corroborated the importance of cell-cell contact in immunosuppression by MSCs. Taken together, these findings reveal a novel function of adhesion molecules in immunoregulation by MSCs and provide new insights for the clinical studies of antiadhesion therapies in various immune disorders.
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MESH Headings
- Animals
- Antibodies, Neutralizing/immunology
- Antibodies, Neutralizing/pharmacology
- Cells, Cultured
- Coculture Techniques
- Culture Media, Conditioned/pharmacology
- Female
- Flow Cytometry
- Immunosuppression Therapy
- Inflammation Mediators/immunology
- Inflammation Mediators/metabolism
- Intercellular Adhesion Molecule-1/genetics
- Intercellular Adhesion Molecule-1/metabolism
- Interferon-gamma/immunology
- Interferon-gamma/metabolism
- Interleukin-1/immunology
- Interleukin-1/metabolism
- Male
- Mesenchymal Stem Cells/drug effects
- Mesenchymal Stem Cells/immunology
- Mesenchymal Stem Cells/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Receptors, Interferon/genetics
- Receptors, Interferon/metabolism
- Receptors, Tumor Necrosis Factor, Type I/genetics
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Spleen/cytology
- Spleen/immunology
- Spleen/metabolism
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Tumor Necrosis Factor-alpha/immunology
- Tumor Necrosis Factor-alpha/metabolism
- Vascular Cell Adhesion Molecule-1/genetics
- Vascular Cell Adhesion Molecule-1/metabolism
- Interferon gamma Receptor
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Affiliation(s)
- Guangwen Ren
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Xin Zhao
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Liying Zhang
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Jimin Zhang
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Andrew L'Huillier
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Weifang Ling
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Arthur I. Roberts
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
| | - Anh D. Le
- Center for Craniofacial Molecular Biology, University of Southern California School of Dentistry, Los Angeles, CA 90033
| | - Songtao Shi
- Center for Craniofacial Molecular Biology, University of Southern California School of Dentistry, Los Angeles, CA 90033
| | - Changshun Shao
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ 08854
| | - Yufang Shi
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School-University of Medicine and Dentistry of New Jersey
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences/Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Cross-talk between MEK1/2-ERK1/2 signaling and G protein-couple signaling in synoviocytes of collagen-induced arthritis rats. Chin Med J (Engl) 2008. [DOI: 10.1097/00029330-200811020-00013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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32
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VCAM-1 and VLA-4 modulate dendritic cell IL-12p40 production in experimental visceral leishmaniasis. PLoS Pathog 2008; 4:e1000158. [PMID: 18802456 PMCID: PMC2528938 DOI: 10.1371/journal.ppat.1000158] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2008] [Accepted: 08/21/2008] [Indexed: 11/19/2022] Open
Abstract
Vascular cell adhesion molecule-1 (VCAM-1) interacts with its major ligand very late antigen-4 (VLA-4) to mediate cell adhesion and transendothelial migration of leukocytes. We report an important role for VCAM-1/VLA-4 interactions in the generation of immune responses during experimental visceral leishmaniasis caused by Leishmania donovani. Our studies demonstrate that these molecules play no direct role in the recruitment of leukocytes to the infected liver, but instead contribute to IL-12p40-production by splenic CD8+ dendritic cells (DC). Blockade of VCAM-1/VLA-4 interactions using whole antibody or anti-VCAM-1 Fab′ fragments reduced IL-12p40 mRNA accumulation by splenic DC 5 hours after L. donovani infection. This was associated with reduced anti-parasitic CD4+ T cell activation in the spleen and lowered hepatic IFNγ, TNF and nitric oxide production by 14 days post infection. Importantly, these effects were associated with enhanced parasite growth in the liver in studies with either anti-VCAM-1 or anti-VLA-4 antibodies. These data indicate a role for VCAM-1 and VLA-4 in DC activation during infectious disease. VCAM-1 and its major ligand VLA-4 are adhesion molecules required for the recruitment and movement of leukocytes within tissue. In this study, we have investigated the role of these molecules during an experimental infection with Leishmania donovani, a protozoan parasite that causes a chronic disease called visceral leishmaniasis. Surprisingly, we showed that VCAM-1 and VLA-4 were not required for leukocyte migration into the liver, a site of acute L. donovani infection. Instead, there was a requirement for these molecules to initiate cell-mediated immune responses in the spleen within the first 5 hours of infection. When VCAM-1 was blocked during infection, early dendritic cell production of IL-12p40, a potent pro-inflammatory cytokine required for control of L. donovani, was suppressed, associated with a reduced parasite-specific T cell response in the spleen, and impaired immunity and parasite clearance in the liver. These results are important because they identify a novel role for VCAM-1 and VLA-4 in the regulation of dendritic cell activation during infectious disease.
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33
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Oishi H, Mizuki S, Terada M, Kudo M, Araki K, Araki M, Nose M, Takahashi S. Increased expression of soluble form of vascular cell adhesion molecule-1 aggravates autoimmune arthritis in MRL-Fas(lpr) mice. Pathol Int 2007; 57:734-40. [PMID: 17922685 DOI: 10.1111/j.1440-1827.2007.02165.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Vascular cell adhesion molecule-1 (VCAM-1, CD106) is important in leukocyte trafficking and its increased expression is associated with a number of chronic inflammatory diseases, including rheumatoid arthritis (RA). A soluble form of VCAM-1 (sVCAM-1) is generated by shedding of the membrane-bound molecule. The concentration of sVCAM-1 is increased in the sera of RA patients, but its pathological role has not been elucidated. The effect of sVCAM-1 relative to protection or aggravation of disease on the development of spontaneous arthritis was examined in an animal model of RA, namely MRL-Fas(lpr) mice (which display a disease resembling human RA), by generation of sVCAM-1 transgenic MRL-Fas(lpr) mice. Transgenic MRL-Fas(lpr) mice that expressed sVCAM-1 had higher incidence and increased severity of arthritis associated with higher levels of serum IgG rheumatoid factor compared with non-transgenic MRL-Fas(lpr) mice. These results suggest that sVCAM-1 plays an arthritogenic role in the development of inflammatory arthritis in MRL-Fas(lpr) mice and may present an important target for therapeutic strategy of RA.
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Affiliation(s)
- Hisashi Oishi
- Department of Anatomy and Embryology, Institute of Basic Medical Sciences, Graduate School of Comprehensive Human Sciences, Biomolecular and Integrated Medical Sciences, University of Tsukuba, Ibaraki, Japan
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Lee S, Chung J, Ha IS, Yi K, Lee JE, Kang HG, Choi I, Oh KH, Kim JY, Surh CD, Ahn C. Hydrogen peroxide increases human leukocyte adhesion to porcine aortic endothelial cells via NF B-dependent up-regulation of VCAM-1. Int Immunol 2007; 19:1349-59. [DOI: 10.1093/intimm/dxm104] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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35
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Nozaki K, Goto H, Nakagawa T, Hikiami H, Koizumi K, Shibahara N, Shimada Y. Effects of keishibukuryogan on vascular function in adjuvant-induced arthritis rats. Biol Pharm Bull 2007; 30:1042-7. [PMID: 17541151 DOI: 10.1248/bpb.30.1042] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
It is known that rheumatoid arthritis (RA) accelerates atherosclerosis. Further, the soluble form of vascular adhesion molecule-1 (VCAM-1) is known as a predictive marker of atherosclerosis in RA patients. We reported that keishibukuryogan, one of the Kampo formulas, improved articular symptoms and decreased soluble VCAM-1 in patients with RA. In adjuvant-induced arthritis (AIA) rats, an animal model of RA, it is known that endothelial function is injured by inflammation. So, we investigated the effect of keishibukuryogan on endothelial function in AIA rats. Lewis rats were divided into control, AIA control, and AIA with keishibukuryogan groups. The AIA with keishibukuryogan group was fed 3% keishibukuryogan contained in normal chow. On day 25 after injection of Mycobacterium butyricum, endothelium-dependent relaxation by acetylcholine in the AIA control group was suppressed, but it was improved in the AIA with keishibukuryogan group. The contractions by xanthine/xanthine oxidase in both AIA rats increased, but that in keishibukuryogan decreased compared to the AIA control group. Plasma levels of lipid peroxide increased in the AIA control group, but keishibukuryogan decreased these levels. Plasma levels of nitric oxide (NO) increased in both AIA groups. The expressions of endothelial NO synthase, inducible NO synthase and VCAM-1 of thoracic aorta were investigated by western blotting. These expressions increased in the AIA control group, but were restricted in the AIA with keishibukuryogan group. We considered that keishibukuryogan protected the endothelial function of AIA rats mainly by its anti-oxidative effect.
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Affiliation(s)
- Kazuya Nozaki
- Department of Japanese Oriental Medicine, Faculty of Medicine, University of Toyama, Sugitani, Japan
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36
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Nishiyama T, Mishima K, Obara K, Inoue H, Doi T, Kondo S, Saka M, Tabunoki Y, Hattori Y, Kodama T, Tsubota K, Saito I. Amelioration of lacrimal gland inflammation by oral administration of K-13182 in Sjögren's syndrome model mice. Clin Exp Immunol 2007; 149:586-95. [PMID: 17614971 PMCID: PMC2219315 DOI: 10.1111/j.1365-2249.2007.03448.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Regulation of the adhesion of mononuclear cells to endothelial cells is considered to be a critical step for the treatment of inflammatory diseases, including autoimmune diseases. K-13182 was identified as a novel inhibitor for these adhesions. K-13182 inhibited the expression of vascular cell adhesion molecule-1 (VCAM-1, CD106) on human umbilical vein endothelial cells (HUVECs) and on mouse vascular endothelial cell line (MAECs) induced by tumour necrosis factor (TNF)-alpha. K-13182 also inhibited the adhesion of mononuclear cells to these HUVECs and MAECs, indicating that K-13182 suppressed these adhesions mediated by cellular adhesion molecules including VCAM-1. To evaluate the therapeutic effect in autoimmune disease model mice, K-13182 was orally administered to non-obese diabetic (NOD) mice as Sjögren's syndrome (SS) model mice. Severe destructive inflammatory lesions were observed in the lacrimal glands of vehicle-treated control mice; however, 8-week administration of K-13182 inhibited the mononuclear cell infiltration into the inflammatory lesions of the lacrimal glands. In K-13182-treated mice, the decrease in tear secretion was also prevented compared to the control mice. In addition, the apoptosis and the expression of FasL (CD178), perforin, and granzyme A was suppressed in the lacrimal glands of K-13182-treated mice. Therefore, K-13182 demonstrated the possibility of therapeutic efficacy for the inflammatory region of autoimmune disease model mice. These data reveal that VCAM-1 is a promising target molecule for the treatment of autoimmune diseases as a therapeutic strategy and that K-13182 has the potential as a new anti-inflammatory drug for SS.
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Affiliation(s)
- T Nishiyama
- Department of Pathology, Tsurumi University School of Dental Medicine, Yokohama, Japan; Sjögren's Syndrome Project, Shinanomachi Research Park, Keio University, Tokyo, Japan
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37
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Abstract
Rheumatoid arthritis (RA) is a chronic, systemic inflammatory disease that causes significant morbidity and mortality. The pathogenesis outlined to date in RA consists of a cascade of pro-inflammatory cytokines and chemokines leading to the recruitment of inflammatory cells and the self perpetuation of inflammation, ultimately leading to cartilage and bone destruction. The dramatic progress in understanding the molecular immunology in RA has led to a transition from conventional treatment with aggressive immune suppression to targeted biological-based therapies that control the inflammatory pathways associated with RA. This article reviews the current biological and small-molecule therapies approved for the treatment of RA and those in development, including antibodies, tolerising agents and vaccines.
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Affiliation(s)
- Adriana H Tremoulet
- University of California, Department of Pediatrics, 9500 Gilman Drive, MC 0731, La Jolla, CA 92093, USA
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38
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Levy AS, Simon O, Shelly J, Gardener M. 6-Shogaol reduced chronic inflammatory response in the knees of rats treated with complete Freund's adjuvant. BMC Pharmacol 2006; 6:12. [PMID: 17010215 PMCID: PMC1599714 DOI: 10.1186/1471-2210-6-12] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Accepted: 10/01/2006] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND 6-Shogaol is one of the major compounds in the ginger rhizome that may contribute to its anti-inflammatory properties. Confirmation of this contribution was sought in this study in Sprague- Dawley rats (200-250 g) treated with a single injection (0.5 ml of 1 mg/ml) of a commercial preparation of complete Freund's Adjuvant (CFA) to induce monoarthritis in the right knee over a period of 28 days. During this development of arthritis, each rat received a daily oral dose of either peanut oil (0.2 ml-control) or 6-shogaol (6.2 mg/Kg in 0.2 ml peanut oil). RESULTS Within 2 days of CFA injection, the control group produced maximum edematous swelling of the knee that was sustained up to the end of the investigation period. But, in the 6-shogaol treated group, significantly lower magnitudes of unsustained swelling of the knees (from 5.1 +/- 0.2 mm to 1.0 +/- 0.2 mm, p < 0.002, n = 6) were produced during the investigation period. Unsustained swelling of the knees (from 3.2 +/- 0.6 mm to 0.8 +/- 1.1 mm, p < 0.00008, n = 6) was also produced after 3 days of treatment with indomethacin (2 mg/Kg/day) as a standard anti-inflammatory drug, but during the first 2 days of drug treatment swelling of the knees was significantly larger (11.6 +/- 2.0 mm, p < 0.0002, n = 6) than either the controls or the 6-shogaol treated group of rats. This exaggerated effect in the early stage of indomethacin treatment was inhibited by montelukast, a cysteinyl leukotriene receptor antagonist. Also, 6-shogaol and indomethacin were most effective in reducing swelling of the knees on day 28 when the controls still had maximum swelling. The effect of 6-shogaol compared to the controls was associated with significantly lower concentration of soluble vascular cell adhesion molecule-1 (VCAM-1) in the blood and infiltration of leukocytes, including lymphocytes and monocytes/macrophages, into the synovial cavity of the knee. There was also preservation of the morphological integrity of the cartilage lining the femur compared to damage to this tissue in the peanut oil treated control group of rats. CONCLUSION From these results, it is concluded that 6-shogaol reduced the inflammatory response and protected the femoral cartilage from damage produced in a CFA monoarthritic model of the knee joint of rats.
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Affiliation(s)
- Arkene Sa Levy
- Department of Basic Medical Sciences, Pharmacology Section, University of the West Indies, Mona Campus, Jamaica
| | - Oswald Simon
- Department of Basic Medical Sciences, Pharmacology Section, University of the West Indies, Mona Campus, Jamaica
| | - Janet Shelly
- Department of Basic Medical Sciences, Pharmacology Section, University of the West Indies, Mona Campus, Jamaica
| | - Michael Gardener
- Department of Basic Medical Sciences, Anatomy Section, University of the West Indies, Mona Campus, Jamaica
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Abstract
The recruitment of leukocytes to inflamed tissues plays an essential role in combating infection and promoting wound healing. However, in autoimmune diseases such as multiple sclerosis and diabetes, leukocytes enter tissues and contribute to inappropriate inflammatory responses, which cause tissue injury and dysfunction. In diseases of this type, lymphocytes play critical roles in initiating and maintaining these aberrant inflammatory responses. The aim of this review is to examine the mechanisms whereby T-lymphocytes enter tissues in autoimmune diseases and to compare these mechanisms between various organs and diseases. An overview of the mechanisms of leukocyte recruitment and the techniques used to study leukocyte trafficking is provided, focusing on the use of intravital microscopy as a tool to assess the functional microvasculature in vivo. We also discuss the series of tissue homing events which allow naïve lymphocytes to first enter lymph nodes and undergo activation, then subsequently to home to the peripheral organ where their cognate antigen is present. Finally, we examine mechanisms of leukocyte recruitment in diseases such as multiple sclerosis, autoimmune diabetes, systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease and asthma.
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Affiliation(s)
- M U Norman
- Immunology Research Group, University of Calgary, Calgary, AB, Canada
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40
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Abstract
Leukocyte infiltration into the joint space and tissues is an essential component of the pathogenesis of rheumatoid arthritis (RA). In this review, we will summarize the current understanding of the mechanisms of leukocyte trafficking into the synovium, focusing on the role of adhesion molecules, chemokines, and chemokine receptors in synovial autoimmune inflammation. The process by which a circulating leukocyte decides to migrate into the synovium is highly regulated and involves the capture, firm adhesion, and transmigration of cells across the endothelial monolayer. Adhesion molecules and chemokine signals function in concert to mediate this process and to organize leukocytes into distinct structures within the synovium. Chemokines play a key regulatory role in organ-specific leukocyte trafficking and activation by affecting integrin activation, chemotaxis, effector cell function, and cell survival. Consequently, chemokines, their receptors, and downstream signal transduction molecules are attractive therapeutic targets for RA.
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Affiliation(s)
- Teresa K Tarrant
- Department of Medicine, Division of Rheumatology, Allergy, and Immunology, Thurston Arthritis Research Center, University of North Carolina, 3330 Thurston Bldg., CB#7280, Chapel Hill, NC 27599, USA
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41
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Schreiner EP, Oberhauser B, Foster CA. Inhibitors of vascular cell adhesion molecule-1 expression. Expert Opin Ther Pat 2005. [DOI: 10.1517/13543776.13.2.149] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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42
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Graber J, Zhan M, Ford D, Kursch F, Francis G, Bever C, Panitch H, Calabresi PA, Dhib-Jalbut S. Interferon-beta-1a induces increases in vascular cell adhesion molecule: implications for its mode of action in multiple sclerosis. J Neuroimmunol 2005; 161:169-76. [PMID: 15748956 DOI: 10.1016/j.jneuroim.2004.11.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2004] [Revised: 11/24/2004] [Accepted: 11/24/2004] [Indexed: 10/25/2022]
Abstract
We investigated soluble vascular cell adhesion molecule-1 (sVCAM) levels and MRI lesions over 24 weeks in 15 Relapsing Remitting MS (RRMS) patients randomized prospectively to receive once-weekly (qw) IFN-beta-1a 30 mug intramuscularly (IM) (Group I, 8 patients) or three-times-weekly (tiw) IFN-beta-1a 44 mug subcutaneously (SC) (Group II, 7 patients). Both groups demonstrated a significant increase in sVCAM during treatment when compared to pre-treatment levels. Patients on IFN-beta-1a 44 mug SC tiw had a significant (p<0.0001) mean increase in sVCAM of 321.9 ng/ml which was significantly greater (p<0.0001) than with IFN-beta-1a 30 mug IM qw (68.6 ng/ml). There was a negative correlation between combined unique (CU) MRI lesions and sVCAM levels within the IFN-beta-1a 44 mug SC tiw group (slope=-0.00106, p=0.009). We postulate that the mode of action of IFN-beta therapy in MS may involve the induction of an increase in sVCAM. sVCAM could bind VLA-4 on T-cells and intercept their adhesion to the blood brain barrier (BBB). This mechanism is consistent with the observed clinical effect of IFN-beta in reducing MRI contrast enhancing lesions.
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Affiliation(s)
- J Graber
- University of Maryland School of Medicine, Department of Neurology, Baltimore, MD, USA
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Woo CH, Lim JH, Kim JH. VCAM-1 upregulation via PKCdelta-p38 kinase-linked cascade mediates the TNF-alpha-induced leukocyte adhesion and emigration in the lung airway epithelium. Am J Physiol Lung Cell Mol Physiol 2004; 288:L307-16. [PMID: 15489375 DOI: 10.1152/ajplung.00105.2004] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Vascular cell adhesion molecule (VCAM)-1 plays a central role in the recruitment of inflammatory cells, and its expression is rapidly induced by proinflammatory cytokines such as TNF-alpha. In the present study, we show that pretreatment with rottlerin, a specific inhibitor of protein kinase C (PKC)-delta, or transient transfection with antisense PKCdelta oligonucleotides significantly inhibits TNF-alpha-induced expression of VCAM-1, but not of intercellular adhesion molecule (ICAM)-1 in human lung epithelium A549 cells. In addition, TNF-alpha was shown to induce the expression of VCAM-1 in a p38 kinase-dependent manner; also, TNF-alpha-induced p38 kinase activation was blocked by inhibition of PKCdelta, suggesting that p38 kinase is apparently situated downstream of PKCdelta in the TNF-alpha-signaling pathway to VCAM-1 expression. Notably, inhibition of the PKCdelta-p38 kinase cascade also attenuated the TNF-alpha-induced adhesion of neutrophils to lung epithelium and the trafficking of leukocytes across the epithelium into the airway lumen in vivo. Together, these findings indicate that signaling via PKCdelta-p38 kinase-linked cascade specifically induces expression of VCAM-1 in lung epithelium in response to TNF-alpha and that this effect is both functionally and clinically significant.
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Affiliation(s)
- Chang-Hoon Woo
- School of Life Sciences and Biotechnology, Korea University, 5-1 Anam-dong, Sungbuk-gu, Seoul, 136-701, Korea
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Middleton J, Americh L, Gayon R, Julien D, Aguilar L, Amalric F, Girard JP. Endothelial cell phenotypes in the rheumatoid synovium: activated, angiogenic, apoptotic and leaky. Arthritis Res Ther 2004; 6:60-72. [PMID: 15059266 PMCID: PMC400438 DOI: 10.1186/ar1156] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2003] [Revised: 01/28/2004] [Accepted: 02/04/2004] [Indexed: 01/23/2023] Open
Abstract
Endothelial cells are active participants in chronic inflammatory diseases. These cells undergo phenotypic changes that can be characterised as activated, angiogenic, apoptotic and leaky. In the present review, these phenotypes are described in the context of human rheumatoid arthritis as the disease example. Endothelial cells become activated in rheumatoid arthritis pathophysiology, expressing adhesion molecules and presenting chemokines, leading to leukocyte migration from the blood into the tissue. Endothelial cell permeability increases, leading to oedema formation and swelling of the joints. These cells proliferate as part of the angiogenic response and there is also a net increase in the turnover of endothelial cells since the number of apoptotic endothelial cells increases. The endothelium expresses various cytokines, cytokine receptors and proteases that are involved in angiogenesis, proliferation and tissue degradation. Associated with these mechanisms is a change in the spectrum of genes expressed, some of which are relatively endothelial specific and others are widely expressed by other cells in the synovium. Better knowledge of molecular and functional changes occurring in endothelial cells during chronic inflammation may lead to the development of endothelium-targeted therapies for rheumatoid arthritis and other chronic inflammatory diseases.
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Affiliation(s)
- Jim Middleton
- Endocube S,A,S, Prologue Biotech, Labege cedex, France.
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Dedrick RL, Bodary S, Garovoy MR. Adhesion molecules as therapeutic targets for autoimmune diseases and transplant rejection. Expert Opin Biol Ther 2003; 3:85-95. [PMID: 12718733 DOI: 10.1517/14712598.3.1.85] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Inflammatory disorders such as autoimmune diseases and graft rejection are mediated by activated leukocytes, particularly T lymphocytes, which penetrate the inflamed tissue and perpetuate or amplify the immune reaction. In an unstimulated state, leukocytes do not readily adhere to the vascular endothelium. However, inflammatory signals induce the expression of proteins on the endothelial cell surface that promote the adhesion and extravasation of activated immune cells from the circulation into the underlying tissues. Key among these molecules are P- and E-selectin, intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) on the endothelial cells, and their respective counter receptors, P-selectin glycoprotein ligand-1 (PSGL-1), leukocyte function-associated antigen-1 (LFA-1) and very late antigen-4 (VLA-4), on the leukocytes. In vitro blockade of these molecules inhibits the adhesion of leukocytes. In many cases there is attenuation of leukocyte activation as well. Adhesion blockade in animal models prevents or ameliorates graft rejection and disease severity in autoimmune models. Clinical studies with humanised monoclonal antibodies which interfere with LFA-1/ICAM-1 or VLA-4/VCAM-1 interactions have shown significant efficacy and good safety profiles in autoimmune disease, including psoriasis, multiple sclerosis and inflammatory bowel disease. Thus, adhesion blockade is emerging as a useful therapeutic strategy in several inflammatory settings.
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