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Lam AD, Styles IK, Senyschyn D, Cao E, Anshabo A, Abdallah M, Mikrani R, Nowell CJ, Porter CJH, Feeney OM, Trevaskis NL. Intra-articular Injection of a B Cell Depletion Antibody Enhances Local Exposure to the Joint-Draining Lymph Node in Mice with Collagen-Induced Arthritis. Mol Pharm 2023; 20:2053-2066. [PMID: 36945772 DOI: 10.1021/acs.molpharmaceut.2c01041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Changes to the number, type, and function of immune cells within the joint-draining lymphatics is a major contributor to the progression of inflammatory arthritis. In particular, there is a significant expansion in pathogenic B cells in the joint-draining lymph node (jdLN). These B cells appear to clog the lymphatic sinuses in the lymph node, inhibit lymph flow, and therefore, reduce the clearance of inflammatory fluid and cells from the joint. Taken together, there is potential to treat inflammatory arthritis more effectively, as well as reduce off-target side effects, with localized delivery of B-cell depleting therapies to the jdLNs. We recently reported that joint-draining lymphatic exposure of biologic disease-modifying anti-rheumatic drugs (DMARDs), including the B cell depletion antibody rituximab, is increased in healthy rats following intra-articular (IA) compared to subcutaneous (SC) or intravenous (IV) administration. This suggests that IA administration of B cell depleting antibodies may increase delivery to target cells in the jdLN and increase the effectiveness of B cell depletion compared to standard SC or IV administration. However, whether enhanced local delivery of DMARDs to the jdLN is also achieved after IA injection in the setting of inflammatory arthritis, where there is inflammation in the joint and jdLN B cell expansion is unknown. We, therefore, assessed the lymph node distribution, absorption and plasma pharmacokinetics, and B cell depletion at different sites after IA, SC, or IV administration of a fluorescently labeled mouse anti-CD20 B cell depleting antibody (Cy5-αCD20) in healthy mice compared to mice with collagen-induced arthritis (CIA). The absorption and plasma pharmacokinetics of Cy5-αCD20 appeared unaltered in mice with CIA whereas distribution of Cy5-αCD20 to the jdLNs was generally increased in mice with CIA, regardless of the route of administration. However, IA administration led to greater and more specific exposure to the jdLNs. Consistent with increased Cy5-αCD20 in the jdLNs of CIA compared to healthy mice, there was a greater reduction in jdLN weight and a trend toward greater jdLN B cell depletion at 24 h compared to 4 h after IA compared to SC and IV administration. Taken together, this data supports the potential to improve local efficacy of B cell depletion therapies through a jdLN-directed approach which will enable a reduction in dose and systemic toxicities.
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Affiliation(s)
- Alina D Lam
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Ian K Styles
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Danielle Senyschyn
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Enyuan Cao
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Abel Anshabo
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Mohammad Abdallah
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Reyaj Mikrani
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Cameron J Nowell
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Christopher J H Porter
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Orlagh M Feeney
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
| | - Natalie L Trevaskis
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 399 Royal Parade, Parkville, Victoria 3052, Australia
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Dissecting the Molecular Mechanism of Wang-Bi Capsule in the Treatment of Experimental Rheumatoid Arthritis Based on Synovial Tissue Proteomic Analysis. J Immunol Res 2021; 2021:5539008. [PMID: 34708132 PMCID: PMC8545597 DOI: 10.1155/2021/5539008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 09/24/2021] [Indexed: 11/30/2022] Open
Abstract
Wang-Bi capsule (WB) is a traditional Chinese medicine formula and has been applied for rheumatoid arthritis (RA) treatment for many years. However, its underlying molecular mechanisms still remain unclear. In this study, collagen-induced arthritis (CIA) rats were used to observe the therapeutic effect of WB used at different time points, and the proteomic analysis of synovial tissue was applied to reveal its basic molecular mechanisms. The results demonstrated that WB not only effectively ameliorated the symptoms and synovitis, but also downregulated the serum levels of inflammatory cytokines/chemokines in CIA rats. Furthermore, the proteomic analysis of synovial tissue showed that WB could regulate several signaling pathways associated with inflammation or cell migration, such as “IL-1 signaling,” “IL-8 signaling,” and “CXCR4 signaling.” The expression levels of proteins including matrix metalloproteinase 3 (MMP3), MMP19, lipopolysaccharide-binding protein (LBP), serine/threonine kinase interleukin-1 receptor-associated kinase 4 (IRAK4), and actin-related protein 2/3 complex subunit 5 (ARPC5) in these pathways were downregulated significantly by WB when compared with the model group. In sum, this study indicated that WB had obvious inhibitory effects on synovitis of CIA rats, and the mechanisms of which may be involved in downregulating the expression levels of several key proteins including MMP3, MMP19, LBP, IRAK4, and ARPC5.
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Li X, Hou Y, Meng X, Li G, Xu F, Teng L, Sun F, Li Y. Folate receptor-targeting mesoporous silica-coated gold nanorod nanoparticles for the synergistic photothermal therapy and chemotherapy of rheumatoid arthritis. RSC Adv 2021; 11:3567-3574. [PMID: 35424296 PMCID: PMC8694156 DOI: 10.1039/d0ra08689d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 12/10/2020] [Indexed: 12/24/2022] Open
Abstract
The synergy of photothermal therapy (PTT) and chemotherapy is widely regarded as an effective treatment for complex diseases, such as cancer and inflammation. In this paper, we report the synthesis of a nanoscaled drug delivery system, which was composed of a gold nanorod (GNR) as the photothermal agent and a mesoporous silica shell as the methotrexate (MTX) reservoir, named FAGMs. Due to folate modification on the surface, FAGMs targeted specifically activated macrophages in rheumatoid arthritis (RA). Under 808 nm laser irradiation, FAGMs could kill macrophages by reaching sufficient local hyperthermia with excellent efficiency in the photothermal conversion of GNRs. Meanwhile, internal heating caused hydrogen bond fracture; thus, MTX released rapidly from FAGMs for localized synergistic PTT and chemotherapy. The FAGMs had a mean particle size of about 180 nm and a zeta potential of 14.36 mV. The release rate of MTX from FAGMs in vitro increased markedly under 808 nm laser irradiation. In a cellular uptake study, stronger fluorescence signals were observed in activated macrophages when treated with FAGMs, suggesting that folic acid molecules enabled the enhancement of endocytosis into activated macrophages. In rats with adjuvant-induced arthritis, synergistic treatment excellently inhibited the progression of RA. These results demonstrated that FAGMs could be promising for the treatment of RA.
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Affiliation(s)
- Xiangyu Li
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Yufei Hou
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Xiangxue Meng
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Ge Li
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Fei Xu
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Lesheng Teng
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Fengying Sun
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
| | - Youxin Li
- School of Life Sciences, Jilin University 2699 Qianjin Street, Changchun Jilin 130012 China
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Proportion of the CD19-Positive and CD19-Negative Lymphocytes and Monocytes within the Peripheral Blood Mononuclear Cell Set is Characteristic for Rheumatoid Arthritis. ACTA ACUST UNITED AC 2019; 55:medicina55100630. [PMID: 31554310 PMCID: PMC6843217 DOI: 10.3390/medicina55100630] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/12/2019] [Accepted: 09/17/2019] [Indexed: 12/17/2022]
Abstract
Background and objectives: Composition of the peripheral blood (PB) cell populations and their activation state reflect the immune status of a patient. Rheumatoid arthritis (RA) is characterized by abnormal B- and T-cell functions. The objective of this study was to assess the profiles of the PB mononuclear cell (PBMC) populations in patients with rheumatoid and osteoarthritis (OA) in comparison with healthy control (HC) subjects in order to evaluate the PBMC profiles as a potential diagnostic characteristic in RA. The second aim was to assess the CCR1 and CCR2 expression on PB lymphocytes and correlate it with the plasma levels of matrix metallopeptidase 9 (MMP-9), IL-17F, TNF-α, IL-6, and IL-10. Materials and Methods: The frequency and phenotype, including CCR1 and CCR2, of the PBMC populations (monocytes, CD19+B cells, and T/NK lymphocytes) in RA (n = 15) and OA (n = 10) patients and HC (n = 12) were analyzed by five-color flow cytometry. DNA of the viruses, HHV-6, HHV-7, and B19, in the whole blood and cell-free plasma, were assessed by nested-polymerase chain reaction (PCR). Results: Active persistent or acute infections, caused by HHV-6, HHV-7, or B19, were not detected in patients of this study. Both CCR1 and CCR2 were determined on the PB B and T/NK lymphocytes in several RA and OA patients and HCs. However, in patients, the frequency of the CCR1-positive T/NK lymphocytes showed a weak negative correlation with the IL-10 level, while the frequency of the CCR2-positive B cells correlated positively with the level of IL-6. Statistically significant differences in the proportions of the CD19-positive and CD19-negative lymphocyte and monocyte subsets within the PBMC set were determined between RA and OA patients and HC adults. Conclusions: We have shown in our pilot study with rather small cohorts of patients that the PBMC-population profiles were very consistent, and statistically significantly differed between RA and OA patients and HC subjects.
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IL-10 producing B cells rescue mouse fetuses from inflammation-driven fetal death and are able to modulate T cell immune responses. Sci Rep 2019; 9:9335. [PMID: 31249364 PMCID: PMC6597542 DOI: 10.1038/s41598-019-45860-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 06/11/2019] [Indexed: 11/26/2022] Open
Abstract
Understanding the mechanisms leading to fetal death following maternal subclinical infections is crucial to develop new therapeutic strategies. Here we addressed the relevance of IL-10 secreting B cells (B10) in the maintenance of the immune balance during gestation. µMT females lacking mature B cells presented normal pregnancies, although their fetuses were smaller and their Treg pool did not expand as in B cell sufficient controls. Pregnant µMT females were more susceptible to LPS despite having less Treg; their fetuses died at doses compatible with pregnancy in WT animals. Adoptive transfer of IL-10 negative B effector cells or B cells from IL-10 deficient mice did not modify this outcome. The transfer of B10 cells or application of recombinant murine IL-10 reduced the fetal loss, associated with a normalization of Treg numbers and cytokine modulation at the feto-maternal interface. B cell-derived IL-10 suppressed the production of IL-17A and IL-6 by T cells and promoted the conversion of naïve cells into Treg. B10 cells are required to restore the immune balance at the feto-maternal interface when perturbed by inflammatory signals. Our data position B cells in a central role in the maintenance of the balance between immunity and tolerance during pregnancy.
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Abstract
B cells are essential to the adaptive immune system for providing the humoral immunity against cohorts of pathogens. The presentation of antigen to the B cell receptor (BCR) leads to the initiation of B cell activation, which is a process sensitive to the stiffness features of the substrates presenting the antigens. Mechanosensing of the B cells, potentiated through BCR signaling and the adhesion molecules, efficiently regulates B cell activation, proliferation and subsequent antibody responses. Defects in sensing of the antigen-presenting substrates can lead to the activation of autoreactive B cells in autoimmune diseases. The use of high-resolution, high-speed live-cell imaging along with the sophisticated biophysical materials, has uncovered the mechanisms underlying the initiation of B cell activation within seconds of its engagement with the antigen presenting substrates. In this chapter, we reviewed studies that have contributed to uncover the molecular mechanisms of B cell mechanosensing during the initiation of B cell activation.
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Affiliation(s)
- Samina Shaheen
- Center for life sciences, MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing Key Lab for Immunological Research on Chronic Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Zhengpeng Wan
- Center for life sciences, MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing Key Lab for Immunological Research on Chronic Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Kabeer Haneef
- Center for life sciences, MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing Key Lab for Immunological Research on Chronic Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Yingyue Zeng
- Center for life sciences, MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing Key Lab for Immunological Research on Chronic Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Wang Jing
- Center for life sciences, MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing Key Lab for Immunological Research on Chronic Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Wanli Liu
- Center for life sciences, MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing Key Lab for Immunological Research on Chronic Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China.
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Herman AE, Chinn LW, Kotwal SG, Murray ER, Zhao R, Florero M, Lin A, Moein A, Wang R, Bremer M, Kokubu S, Serone AP, Hanze EL, Viberg A, Morimoto AM, Winter HR, Katsumoto TR. Safety, Pharmacokinetics, and Pharmacodynamics in Healthy Volunteers Treated With GDC-0853, a Selective Reversible Bruton's Tyrosine Kinase Inhibitor. Clin Pharmacol Ther 2018; 103:1020-1028. [PMID: 29484638 DOI: 10.1002/cpt.1056] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/09/2018] [Accepted: 02/12/2018] [Indexed: 12/20/2022]
Abstract
GDC-0853 is a small molecule inhibitor of Bruton's tyrosine kinase (BTK) that is highly selective and noncovalent, leading to reversible binding. In double-blind, randomized, and placebo-controlled phase I healthy volunteer studies, GDC-0853 was well tolerated, with no dose-limiting adverse events (AEs) or serious AEs. The maximum tolerated dose was not reached during dose escalation (≤600 mg, single ascending dose (SAD) study; ≤250 mg twice daily (b.i.d.) and ≤500 mg once daily, 14-day multiple ascending dose (MAD) study). Plasma concentrations peaked 1-3 hours after oral administration and declined thereafter, with a steady-state half-life ranging from 4.2-9.9 hours. Independent assays demonstrated dose-dependent BTK target engagement. Based on pharmacokinetic/pharmacodynamic (PK/PD) simulations, a once-daily dosing regimen (e.g., 100 mg, q.d.) is expected to maintain a high level of BTK inhibition over the dosing interval. Taken together, the safety and PK/PD data support GDC-0853 evaluation in rheumatoid arthritis, lupus, and other autoimmune or inflammatory indications.
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Affiliation(s)
- Ann E Herman
- Genentech, Inc, South San Francisco, California, USA
| | | | | | | | - Rui Zhao
- Genentech, Inc, South San Francisco, California, USA
| | | | - Alyse Lin
- Genentech, Inc, South San Francisco, California, USA
| | - Anita Moein
- Genentech, Inc, South San Francisco, California, USA
| | - Rena Wang
- Genentech, Inc, South San Francisco, California, USA
| | - Meire Bremer
- Genentech, Inc, South San Francisco, California, USA
| | - Serika Kokubu
- Genentech, Inc, South San Francisco, California, USA
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Shaheen S, Wan Z, Li Z, Chau A, Li X, Zhang S, Liu Y, Yi J, Zeng Y, Wang J, Chen X, Xu L, Chen W, Wang F, Lu Y, Zheng W, Shi Y, Sun X, Li Z, Xiong C, Liu W. Substrate stiffness governs the initiation of B cell activation by the concerted signaling of PKCβ and focal adhesion kinase. eLife 2017; 6. [PMID: 28755662 PMCID: PMC5536945 DOI: 10.7554/elife.23060] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 07/03/2017] [Indexed: 12/17/2022] Open
Abstract
The mechanosensing ability of lymphocytes regulates their activation in response to antigen stimulation, but the underlying mechanism remains unexplored. Here, we report that B cell mechanosensing-governed activation requires BCR signaling molecules. PMA-induced activation of PKCβ can bypass the Btk and PLC-γ2 signaling molecules that are usually required for B cells to discriminate substrate stiffness. Instead, PKCβ-dependent activation of FAK is required, leading to FAK-mediated potentiation of B cell spreading and adhesion responses. FAK inactivation or deficiency impaired B cell discrimination of substrate stiffness. Conversely, adhesion molecules greatly enhanced this capability of B cells. Lastly, B cells derived from rheumatoid arthritis (RA) patients exhibited an altered BCR response to substrate stiffness in comparison with healthy controls. These results provide a molecular explanation of how initiation of B cell activation discriminates substrate stiffness through a PKCβ-mediated FAK activation dependent manner.
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Affiliation(s)
- Samina Shaheen
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Zhengpeng Wan
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Zongyu Li
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Alicia Chau
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Xinxin Li
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Shaosen Zhang
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Yang Liu
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Junyang Yi
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Yingyue Zeng
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Jing Wang
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Xiangjun Chen
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Liling Xu
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Wei Chen
- School of Medicine, Zhejiang University, Hangzhou, China
| | - Fei Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | - Yun Lu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | - Wenjie Zheng
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yan Shi
- Center for Life Sciences, Department of Basic Medical Sciences, Institute of Immunology, Tsinghua University, Beijing, China
| | - Xiaolin Sun
- Department of Rheumatology and Immunology, Clinical Immunology Center, Peking University People's Hospital, Beijing, China
| | - Zhanguo Li
- Department of Rheumatology and Immunology, Clinical Immunology Center, Peking University People's Hospital, Beijing, China
| | - Chunyang Xiong
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China.,College of Engineering, Peking University, Beijing, China
| | - Wanli Liu
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
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Tsujimura S, Adachi T, Saito K, Kawabe A, Tanaka Y. Relevance of P-glycoprotein on CXCR4 + B cells to organ manifestation in highly active rheumatoid arthritis. Mod Rheumatol 2017; 28:276-286. [PMID: 28696805 DOI: 10.1080/14397595.2017.1341458] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
INTRODUCTION In rheumatoid arthritis (RA), P-glycoprotein (P-gp) expression on activated B cells is associated with active efflux of intracellular drugs, resulting in drug resistance. CXCR4 is associated with migration of B cells. This study was designed to elucidate the relevance of P-gp expression on CXCR4+ B cells to clinical manifestations in refractory RA. METHODS CD19+ B cells were analyzed using flow cytometry and immunohistochemistry. RESULTS P-gp was highly expressed especially on CXCR4+CD19+ B cells in RA. The proportion of P-gp-expressing CXCR4+ B cells correlated with disease activity, estimated by Simplified Disease Activity Index (SDAI), and showed marked expansion in RA patients with high SDAI and extra-articular involvement. In highly active RA, massive infiltration of P-gp+CXCR4+CD19+ B cells was noted in CXCL12-expressing inflammatory lesions of RA synovitis and RA-associated interstitial pneumonitis. In RA patient with active extra-articular involvement, intracellular dexamethasone level (IDL) in lymphocytes diminished with expansion of P-gp+CXCR4+ CD19+ B cells. Adalimumab reduced P-gp+CXCR4+ CD19+ B cells, increased IDL in lymphocytes, and improved the clinical manifestation and allowed tapering of concomitant medications. CONCLUSIONS Expansion of P-gp+CXCR4+ B cells seems to be associated with drug resistance, disease activity and progressive destructive arthritis with extra-articular involvement in RA.
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Affiliation(s)
- Shizuyo Tsujimura
- a The First Department of Internal Medicine, School of Medicine , University of Occupational & Environmental Health , Kitakyushu , Japan
| | - Tomoko Adachi
- a The First Department of Internal Medicine, School of Medicine , University of Occupational & Environmental Health , Kitakyushu , Japan
| | - Kazuyoshi Saito
- a The First Department of Internal Medicine, School of Medicine , University of Occupational & Environmental Health , Kitakyushu , Japan
| | - Akio Kawabe
- a The First Department of Internal Medicine, School of Medicine , University of Occupational & Environmental Health , Kitakyushu , Japan
| | - Yoshiya Tanaka
- a The First Department of Internal Medicine, School of Medicine , University of Occupational & Environmental Health , Kitakyushu , Japan
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de Jong TD, Sellam J, Agca R, Vosslamber S, Witte BI, Tsang-A-Sjoe M, Mantel E, Bijlsma JW, Voskuyl AE, Nurmohamed MT, Verweij CL, Mariette X. A multi-parameter response prediction model for rituximab in rheumatoid arthritis. Joint Bone Spine 2017; 85:219-226. [PMID: 28363827 DOI: 10.1016/j.jbspin.2017.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 02/22/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVES To validate the IFN response gene (IRG) set for the prediction of non-response to rituximab in rheumatoid arthritis (RA) and assess the predictive performance upon combination of this gene set with clinical parameters. METHODS In two independent cohorts of 93 (cohort I) and 133 (cohort II) rituximab-starting RA patients, baseline peripheral blood expression of eight IRGs was determined, and averaged into an IFN score. Predictive performance of IFN score and clinical parameters was assessed by logistic regression. A multivariate prediction model was developed using a forward stepwise selection procedure. Patients with a decrease in disease activity score (ΔDAS28)≥1.8 after 6 months of therapy were considered responders. RESULTS The mean IFN score was higher in non-responders compared to responders in both cohorts, but this difference was most pronounced in patients who did not use prednisone, as described before. Univariate analysis in cohort I showed that baseline DAS28, IFN score, DMARD use and negativity for IgM-RF and/or ACPA were associated with rituximab non-response. The multivariate model consisted of DAS28, IFN score and DMARD use, which showed an area under the curve (AUC) of 0.82. In cohort II, this model revealed a comparable AUC in PREDN-negative patients (0.78), but AUC in PREDN-positive patients was significantly lower (0.63), which seemed due to effect modification of the IFN score by prednisone. CONCLUSIONS Combination of predictive parameters provided a promising model for the prediction of non-response to rituximab, with possibilities for optimization via definition of the exact interfering effect of prednisone on IFN score. TRIAL REGISTRATION (COHORT II, SMART TRIAL) NCT01126541, registered 18 May 2010.
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Affiliation(s)
- Tamarah D de Jong
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands.
| | - Jérémie Sellam
- Inserm UMRS_938, DHU i2B, rheumatology department, Saint-Antoine hospital, université Paris 06, AP-HP, 184, rue du Faubourg-Saint-Antoine, 75012 Paris, France
| | - Rabia Agca
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands; Amsterdam rheumatology and immunology center, location Reade, P.O. box 58271, 1040HG Amsterdam, The Netherlands
| | - Saskia Vosslamber
- Department of pathology, VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands
| | - Birgit I Witte
- Department of epidemiology and biostatistics, VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands
| | - Michel Tsang-A-Sjoe
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands
| | - Elise Mantel
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands
| | - Johannes W Bijlsma
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands; Amsterdam rheumatology and immunology center, location Reade, P.O. box 58271, 1040HG Amsterdam, The Netherlands
| | - Alexandre E Voskuyl
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands
| | - Mike T Nurmohamed
- Amsterdam rheumatology and immunology center, location VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands; Amsterdam rheumatology and immunology center, location Reade, P.O. box 58271, 1040HG Amsterdam, The Netherlands
| | - Cornelis L Verweij
- Department of pathology, VU university medical center, P.O. box 7057, 1007MB Amsterdam, The Netherlands
| | - Xavier Mariette
- Inserm U1184, rheumatology department, center for immunology of viral infections and autoimmune diseases, hôpitaux universitaires Paris-Sud, université Paris-Sud, AP-HP, 78, rue du Général-Leclerc, 94275 Le Kremlin-Bicêtre, France
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11
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Wang R, Wu H, Chen J, Li SP, Dai L, Zhang ZR, Wang WY. Antiinflammation Effects and Mechanisms Study of Geniposide on Rats with Collagen-Induced Arthritis. Phytother Res 2017; 31:631-637. [DOI: 10.1002/ptr.5775] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 12/12/2016] [Accepted: 01/04/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Rong Wang
- College of Pharmacy; Anhui University of Chinese Medicine, Key Laboratory of Modernized Chinese Medicine in Anhui Province; Hefei Anhui China
| | - Hong Wu
- College of Pharmacy; Anhui University of Chinese Medicine, Key Laboratory of Modernized Chinese Medicine in Anhui Province; Hefei Anhui China
| | - Jian Chen
- Anhui Institute of Optics and Fine Mechanics; University of Science and Technology of China; Hefei 230031 China
| | - Shu-Ping Li
- College of Pharmacy; Anhui University of Chinese Medicine, Key Laboratory of Modernized Chinese Medicine in Anhui Province; Hefei Anhui China
| | - Li Dai
- College of Pharmacy; Anhui University of Chinese Medicine, Key Laboratory of Modernized Chinese Medicine in Anhui Province; Hefei Anhui China
| | - Zheng-Rong Zhang
- College of Pharmacy; Anhui University of Chinese Medicine, Key Laboratory of Modernized Chinese Medicine in Anhui Province; Hefei Anhui China
| | - Wen-Yu Wang
- College of Pharmacy; Anhui University of Chinese Medicine, Key Laboratory of Modernized Chinese Medicine in Anhui Province; Hefei Anhui China
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12
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Shetty S, Fisher MC, Ahmed AR. Review on the Influence of Protocol Design on Clinical Outcomes in Rheumatoid Arthritis Treated with Rituximab. Ann Pharmacother 2016; 47:311-23. [DOI: 10.1345/aph.1r574] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE To critically analyze the influence of protocol design on clinical outcome in patients with rheumatoid arthritis (RA) treated with rituximab. DATA SOURCES A PubMed and EMBASE search (January 2000-January 2012) using the key words rheumatoid arthritis and rituximab was performed. STUDY SELECTION AND DATA EXTRACTION A search of English-language studies from the data sources was conducted for randomized, double-blind, placebo-controlled studies with 100 patients or more assessing the efficacy and safety of rituximab in the treatment of RA. From these studies, 2 authors independently extracted, compiled, and aggregated the data. DATA SYNTHESIS Eight studies met the inclusion criteria. In these studies, some patients had not been treated with tumor necrosis factor-alfa (TNF-α) inhibitors, while most did not respond to it. The variables compared included dose (500 vs 1000 mg), duration of study (24 vs 48 weeks), and number of cycles (1 vs 2). They were statistically analyzed using the χ2 test. There was a statistically significant difference in the response to rituximab compared to the control (methotrexate) (p < 0.001). In patients who were studied for only 24 weeks, given 500 or 1000 mg for 1 or 2 cycles, a 90% or greater response rate was reported in those who achieved an ACR 20, but no statistically significant differences were observed (p = 0.75). In patients studied for 48 weeks who received 2 cycles of either 500 mg or 1000 mg of rituximab and achieved an ACR 20, a statistically significant difference (p < 0.001) was observed in those who received a dose of 1000 mg for 2 cycles (42.77% vs 67.49%). CONCLUSIONS In patients who are nonresponsive to disease-modifying antirheumatic drugs and TNF-α inhibitors, rituximab may be a promising and well-tolerated biologic agent. The capacity of rituximab to produce long-term, sustained remissions could not be evaluated because the duration of the studies was limited to 24 weeks or 48 weeks. Studies with longer periods of observation are warranted.
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Affiliation(s)
- Shawn Shetty
- Shawn Shetty MD, Research Fellow, Center for Blistering Diseases, Boston, MA
| | - Mark C Fisher
- Mark C Fisher MD, Rheumatology Service, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston
| | - A Razzaque Ahmed
- A Razzaque Ahmed MD DSc, Director, Center for Blistering Diseases
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13
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de Jong TD, Lübbers J, Turk S, Vosslamber S, Mantel E, Bontkes HJ, van der Laken CJ, Bijlsma JW, van Schaardenburg D, Verweij CL. The type I interferon signature in leukocyte subsets from peripheral blood of patients with early arthritis: a major contribution by granulocytes. Arthritis Res Ther 2016; 18:165. [PMID: 27411379 PMCID: PMC4944477 DOI: 10.1186/s13075-016-1065-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 06/27/2016] [Indexed: 01/04/2023] Open
Abstract
Background The type I interferon (IFN) signature in rheumatoid arthritis (RA) has shown clinical relevance in relation to disease onset and therapeutic response. Identification of the cell type(s) contributing to this IFN signature could provide insight into the signature’s functional consequences. The aim of this study was to investigate the contribution of peripheral leukocyte subsets to the IFN signature in early arthritis. Methods Blood was collected from 26 patients with early arthritis and lysed directly or separated into peripheral blood mononuclear cells (PBMCs) and polymorphonuclear granulocytes (PMNs). PBMCs were sorted into CD4+ T cells, CD8+ T cells, CD19+ B cells, and CD14+ monocytes by flow cytometry. Messenger RNA expression of three interferon response genes (IRGs RSAD2, IFI44L, and MX1) and type I interferon receptors (IFNAR1 and IFNAR2) was determined in whole blood and blood cell subsets by quantitative polymerase chain reaction. IRG expression was averaged to calculate an IFN score for each sample. Results Patients were designated “IFNhigh” (n = 8) or “IFNlow” (n = 18) on the basis of an IFN score cutoff in whole peripheral blood from healthy control subjects. The difference in IFN score between IFNhigh and IFNlow patients was remarkably large for the PMN fraction (mean 25-fold) compared with the other subsets (mean 6- to 9-fold), indicating that PMNs are the main inducers of IRGs. Moreover, the relative contribution of the PMN fraction to the whole-blood IFN score was threefold higher than expected from its abundance in blood (p = 0.008), whereas it was three- to sixfold lower for the other subsets (p ≤ 0.063), implying that the PMNs are most sensitive to IFN signaling. Concordantly, IFNAR1 and IFNAR2 were upregulated compared with healthy controls selectively in patient PMNs (p ≤ 0.0077) but not in PBMCs. Conclusions PMNs are the main contributors to the whole-blood type I IFN signature in patients with early arthritis, which seems due to increased sensitivity of these cells to type I IFN signaling. Considering the well-established role of neutrophils in the pathology of arthritis, this suggests a role of type I IFN activity in the disease as well. Electronic supplementary material The online version of this article (doi:10.1186/s13075-016-1065-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tamarah D de Jong
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands. .,Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Amsterdam, The Netherlands.
| | - Joyce Lübbers
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Samina Turk
- Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Reade, Amsterdam, The Netherlands
| | - Saskia Vosslamber
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Elise Mantel
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands.,Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Amsterdam, The Netherlands
| | - Hetty J Bontkes
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands.,Present address: Department of Oral Cell Biology, Academisch Centrum Tandheelkunde Amsterdam, Amsterdam, The Netherlands
| | - Conny J van der Laken
- Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Amsterdam, The Netherlands
| | - Johannes W Bijlsma
- Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Amsterdam, The Netherlands.,Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Reade, Amsterdam, The Netherlands.,Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Academic Medical Center, Amsterdam, The Netherlands
| | - Dirkjan van Schaardenburg
- Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Reade, Amsterdam, The Netherlands.,Amsterdam Rheumatology and Immunology Center, VU University Medical Center, Academic Medical Center, Amsterdam, The Netherlands
| | - Cornelis L Verweij
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
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14
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Mellado M, Martínez-Muñoz L, Cascio G, Lucas P, Pablos JL, Rodríguez-Frade JM. T Cell Migration in Rheumatoid Arthritis. Front Immunol 2015; 6:384. [PMID: 26284069 PMCID: PMC4515597 DOI: 10.3389/fimmu.2015.00384] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 07/13/2015] [Indexed: 12/17/2022] Open
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease characterized by chronic inflammation in joints, associated with synovial hyperplasia and with bone and cartilage destruction. Although the primacy of T cell-related events early in the disease continues to be debated, there is strong evidence that autoantigen recognition by specific T cells is crucial to the pathophysiology of rheumatoid synovitis. In addition, T cells are key components of the immune cell infiltrate detected in the joints of RA patients. Initial analysis of the cytokines released into the synovial membrane showed an imbalance, with a predominance of proinflammatory mediators, indicating a deleterious effect of Th1 T cells. There is nonetheless evidence that Th17 cells also play an important role in RA. T cells migrate from the bloodstream to the synovial tissue via their interactions with the endothelial cells that line synovial postcapillary venules. At this stage, selectins, integrins, and chemokines have a central role in blood cell invasion of synovial tissue, and therefore in the intensity of the inflammatory response. In this review, we will focus on the mechanisms involved in T cell attraction to the joint, the proteins involved in their extravasation from blood vessels, and the signaling pathways activated. Knowledge of these processes will lead to a better understanding of the mechanism by which the systemic immune response causes local joint disorders and will help to provide a molecular basis for therapeutic strategies.
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Affiliation(s)
- Mario Mellado
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones , Madrid , Spain
| | - Laura Martínez-Muñoz
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones , Madrid , Spain
| | - Graciela Cascio
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones , Madrid , Spain
| | - Pilar Lucas
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones , Madrid , Spain
| | - José L Pablos
- Grupo de Enfermedades Inflamatorias y Autoinmunes, Instituto de Investigación Sanitaria Hospital , Madrid , Spain
| | - José Miguel Rodríguez-Frade
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones , Madrid , Spain
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15
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Knight AM. B-cell acquisition of antigen: Sensing the surface. Eur J Immunol 2015; 45:1600-4. [PMID: 25929718 DOI: 10.1002/eji.201545684] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 04/28/2015] [Indexed: 12/30/2022]
Abstract
B-cell antigen receptor (BCR) recognition and acquisition of antigen by B cells is the essential first step in the generation of effective antibody responses. As B-cell-mediated antigen presentation is also believed to play a significant role in the activation of CD4(+) Th-cell responses, considerable effort has focused on clarifying the nature of antigen/BCR interactions. Following earlier descriptions of interactions of soluble antigens with the BCR, it is now clear that B cells also recognize, physically extract and present antigens that are tethered to, or integral components of, the surfaces or extracellular matrix of other cells. In this issue of the European Journal of Immunology, Zeng et al. [Eur. J. Immunol. 2015. 45: XXXX-XXXX] examine how the physical property or "stiffness" of the surface displaying antigens to B cells influences the B-cell response. This commentary reports that antigen tethered on "less stiff" surfaces induces increased B-cell activation and antibody responses. I then infer how "sensing the surface" by B cells may represent a new component of the immune system's ability to detect "damage," and how this understanding may influence approaches to clinical therapies where immune activity is either unwanted or desired.
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Affiliation(s)
- Andrew M Knight
- The Institute of Cellular Medicine, The Faculty of Medical Sciences, Newcastle University, Framlington Place, Newcastle upon Tyne, UK
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16
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Zhang F, Luo W, Li Y, Gao S, Lei G. Role of osteopontin in rheumatoid arthritis. Rheumatol Int 2014; 35:589-95. [PMID: 25163663 DOI: 10.1007/s00296-014-3122-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 08/22/2014] [Indexed: 01/01/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by joint swelling, joint tenderness, and destruction of synovial joints, leading to severe disability and premature mortality. RA is a multifactorial disease with genetic, environmental, and stochastic components related to its susceptibility. It has been demonstrated that the expression of osteopontin (OPN) is upregulated in the RA patients. Numerous studies have indicated that the full-length OPN or even OPN fragments, such as thrombin-cleaved OPN and its receptors, play the key roles in RA pathogenesis. Therapeutic application of siRNA to target OPN or neutralizing antibodies related to OPN epitopes in RA animal models are in progress, and some results are encouraging. However, there is a long way to go along with the clinical trials. This review focuses on the recent development in research associated with the OPN role in the pathogenesis of RA and provides insights concerning the OPN targeting as therapeutic approaches for patients with RA.
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Affiliation(s)
- Fangjie Zhang
- Department of Orthopaedics, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China
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17
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Rodgers DT, Pineda MA, McGrath MA, Al-Riyami L, Harnett W, Harnett MM. Protection against collagen-induced arthritis in mice afforded by the parasitic worm product, ES-62, is associated with restoration of the levels of interleukin-10-producing B cells and reduced plasma cell infiltration of the joints. Immunology 2014; 141:457-66. [PMID: 24708419 PMCID: PMC3930382 DOI: 10.1111/imm.12208] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 10/21/2013] [Accepted: 10/30/2013] [Indexed: 01/05/2023] Open
Abstract
We have previously reported that ES-62, a molecule secreted by the parasitic filarial nematode Acanthocheilonema viteae, protects mice from developing collagen-induced arthritis (CIA). Together with increasing evidence that worm infection may protect against autoimmune conditions, this raises the possibility that ES-62 may have therapeutic potential in rheumatoid arthritis and hence, it is important to fully understand its mechanism of action. To this end, we have established to date that ES-62 protection in CIA is associated with suppressed T helper type 1 (Th1)/Th17 responses, reduced collagen-specific IgG2a antibodies and increased interleukin-10 (IL-10) production by splenocytes. IL-10-producing regulatory B cells have been proposed to suppress pathogenic Th1/Th17 responses in CIA: interestingly therefore, although the levels of IL-10-producing B cells were decreased in the spleens of mice with CIA, ES-62 was found to restore these to the levels found in naive mice. In addition, exposure to ES-62 decreased effector B-cell, particularly plasma cell, infiltration of the joints, and such infiltrating B cells showed dramatically reduced levels of Toll-like receptor 4 and the activation markers, CD80 and CD86. Collectively, this induction of hyporesponsiveness of effector B-cell responses, in the context of the resetting of the levels of IL-10-producing B cells, is suggestive of a modulation of the balance between effector and regulatory B-cell responses that may contribute to ES-62-mediated suppression of CIA-associated inflammation and inhibition of production of pathogenic collagen-specific IgG2a antibodies.
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Affiliation(s)
- David T Rodgers
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
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18
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Ciechomska M, Wilson CL, Floudas A, Hui W, Rowan AD, van Eden W, Robinson JH, Knight AM. Antigen-specific B lymphocytes acquire proteoglycan aggrecan from cartilage extracellular matrix resulting in antigen presentation and CD4+ T-cell activation. Immunology 2014; 141:70-8. [PMID: 24032649 DOI: 10.1111/imm.12169] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/03/2013] [Accepted: 09/03/2013] [Indexed: 12/23/2022] Open
Abstract
The majority of studies examining antigen-presenting cell (APC) function have focused on the capture and presentation of antigens released from pathogens or damaged cells. However, antigen-specific B cells are also capable of efficiently extracting antigens that are either tethered to, or integrally part of the plasma membrane of various target cells. In this study we show that B cells are also highly efficient at extracting integral components of the extracellular matrix (ECM) for subsequent presentation. In particular we demonstrate that B cells specific for aggrecan, an integral component of cartilage ECM, acquire this rheumatoid arthritis candidate autoantigen in both a B-cell-receptor-dependent and a contact-dependent manner. We also demonstrate that the subsequent presentation of aggregan from ECM leads to CD4(+) T-cell activation and effector cell formation. Recent studies have identified B-cell-mediated antigen presentation as essential for the development of autoimmunity, but a unique role for B cells compared with other APC has yet to be defined. Our findings lead us to propose that the acquisition of ECM-derived autoantigens represents a mechanism that defines the APC requirement for B cells in the development of autoimmunity.
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Affiliation(s)
- Marzena Ciechomska
- Institute of Cellular Medicine, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
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Sellam J, Rouanet S, Hendel-Chavez H, Miceli-Richard C, Combe B, Sibilia J, Le Loët X, Tebib J, Jourdan R, Dougados M, Taoufik Y, Mariette X. CCL19, a B cell chemokine, is related to the decrease of blood memory B cells and predicts the clinical response to rituximab in patients with rheumatoid arthritis. ACTA ACUST UNITED AC 2013; 65:2253-61. [PMID: 23740460 DOI: 10.1002/art.38023] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 05/14/2013] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Migration of B cells from peripheral blood to the synovium in patients with rheumatoid arthritis (RA) may predict clinical response to rituximab (RTX). We undertook this study to investigate whether serum levels of chemokines involved in B cell trafficking are correlated with blood levels of memory B cells or serum levels of B cell activation biomarkers before B cell depletion and whether chemokine levels predict RTX responsiveness. METHODS Blood B cell subsets were analyzed by flow cytometry (CD27, IgD), and serum B cell activation biomarkers (rheumatoid factor, anti-cyclic citrullinated peptide, free light chains, IgG, IgA, IgM, and BAFF) were measured in 208 RA patients and 70 control subjects. Serum CCL19, CXCL12, and CXCL13 chemokine levels in patients and controls were determined by enzyme-linked immunosorbent assay. The first course of RTX was administered to RA patients, and the response was evaluated at week 24 according to European League Against Rheumatism (EULAR) criteria. Results were expressed as the odds ratio (OR) and 95% confidence interval (95% CI). RESULTS Levels of all chemokines were increased in RA patients compared with controls, and levels were inversely correlated with CD27+ memory B cell frequency. CCL19 and CXCL13 levels correlated with levels of 6 serum B cell biomarkers and 4 serum B cell biomarkers, respectively. By univariate analysis, the CCL19 level was positively associated with EULAR response (OR 1.43 [95% CI 1.08-1.90], P = 0.01). By multivariate analysis, the CCL19 level was predictive of a response to RTX (OR 1.48 [95% CI 1.06-2.06], P = 0.02), but this did not persist after adjustment for autoantibody status. CONCLUSION CXCL13 and CCL19 reflect blood B cell disturbances and their levels correlate with those of other serum B cell biomarkers. CXCL13 and CCL19 are, therefore, surrogate measures for serum B cell biomarkers in RA. Serum CCL19 measurement is a new hallmark of the B cell-mediated RA subtype and may predict clinical response to RTX.
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Affiliation(s)
- Jérémie Sellam
- Hôpital Saint-Antoine, AP-HP, and Université Pierre et Marie Curie Paris 06, Paris, France
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20
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Rapetti L, Chavele KM, Evans CM, Ehrenstein MR. B cell resistance to Fas-mediated apoptosis contributes to their ineffective control by regulatory T cells in rheumatoid arthritis. Ann Rheum Dis 2013; 74:294-302. [PMID: 24249811 DOI: 10.1136/annrheumdis-2013-204049] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To investigate whether regulatory T cells (Treg) can control B cell function in rheumatoid arthritis (RA) and if not to explore the basis for this defect. METHODS Suppression of B cell responses by Treg was analysed in vitro by flow cytometry and ELISA using peripheral blood mononuclear cells from 65 patients with RA and 41 sex-matched and aged-matched healthy volunteers. Blocking and agonistic antibodies were used to define the role of Fas-mediated apoptosis in B cell regulation. RESULTS Treg failed to restrain B cell activation, proinflammatory cytokine and antibody production in the presence of responder T cells in RA patients. This lack of suppression was not only caused by impaired Treg function but was also due to B cell resistance to regulation. In healthy donors, control by Treg was associated with increased B cell death and relied upon Fas-mediated apoptosis. In contrast, RA B cells had reduced Fas expression compared with their healthy counterparts and were resistant to Fas-mediated apoptosis. CONCLUSIONS These studies demonstrate that Treg are unable to limit B cell responses in RA. This appears to be primarily due to B cell resistance to suppression, but Treg defects also contribute to this failure of regulation. Our data identify the Fas pathway as a novel target for Treg-mediated suppression of B cells and highlight a potential therapeutic approach to restore control of B cells by Treg in RA patients.
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Affiliation(s)
- Laetitia Rapetti
- Division of Medicine, Centre for Rheumatology, University College London, London, UK
| | | | - Catherine M Evans
- Division of Medicine, Centre for Rheumatology, University College London, London, UK
| | - Michael R Ehrenstein
- Division of Medicine, Centre for Rheumatology, University College London, London, UK
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21
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Wang X, Hu Y, Charpentier T, Lamarre A, Qi S, Wu J, Luo H. TNF-like Ligand 1A (TL1A) Gene Knockout Leads to Ameliorated Collagen-Induced Arthritis in Mice: Implication of TL1A in Humoral Immune Responses. THE JOURNAL OF IMMUNOLOGY 2013; 191:5420-9. [DOI: 10.4049/jimmunol.1301475] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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22
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Geng H, Nandakumar KS, Xiong L, Jie R, Dong J, Holmdahl R. Incomplete B Cell Tolerance to Cartilage Oligomeric Matrix Protein in Mice. ACTA ACUST UNITED AC 2013; 65:2301-9. [DOI: 10.1002/art.38046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 05/30/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Hui Geng
- Central China Normal University; Wuhan China
- Karolinska Institute; Stockholm Sweden
| | | | - Li Xiong
- Central China Normal University; Wuhan China
| | - Rui Jie
- Central China Normal University; Wuhan China
| | - Jiahui Dong
- Central China Normal University; Wuhan China
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Abstract
Glucocorticoids have potent anti-inflammatory effects and have been used to treat patients with rheumatoid arthritis for more than 60 years. However, severe adverse effects of glucocorticoid treatment, including loss of bone mass and increased risk of fractures, are common. Data from studies of glucocorticoid-mediated gene regulation, which utilized conditional knockout mice in animal models of arthritis or glucocorticoid-induced osteoporosis, have substantially increased our understanding of the mechanisms by which glucocorticoids act via the glucocorticoid receptor. Following glucocorticoid binding, the receptor regulates gene expression either by interacting with DNA-bound transcription factors as a monomer or by binding directly to DNA as a dimer. In contrast to the old hypothesis that transrepression mechanisms involving monomeric glucocorticoid receptor actions were responsible for the anti-inflammatory effects of glucocorticoids, whereas dimeric glucocorticoid receptor binding resulted in adverse effects, data from animal models have shown that the anti-inflammatory and adverse effects of glucocorticoids are mediated by both monomeric and dimeric glucocorticoid receptor binding. This improved knowledge of the molecular mechanisms that underlie the beneficial and adverse effects of glucocorticoid therapy might lead to the development of rationales for novel glucocorticoid receptor ligands that could potentially have anti-inflammatory efficacy without adverse effects on bone.
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24
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Wright HL, Bucknall RC, Moots RJ, Edwards SW. Analysis of SF and plasma cytokines provides insights into the mechanisms of inflammatory arthritis and may predict response to therapy. Rheumatology (Oxford) 2011; 51:451-9. [PMID: 22179732 DOI: 10.1093/rheumatology/ker338] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Biologic drugs have revolutionized the care of RA, but are expensive and not universally effective. To further understand the inflammatory mechanisms underlying RA and identify potential biomarkers predicting response to therapy, we measured multiple cytokine concentrations in SF of patients with inflammatory arthritides (IAs) and, in a subset of patients with RA, correlated this with response to TNF-α inhibition. METHODS SF from 42 RA patients and 19 non-RA IA patients were analysed for 12 cytokines using a multiplex cytokine assay. Cytokines were also measured in the plasma of 16 RA patients before and following treatment with anti-TNF-α. Data were analysed using Mann-Whitney U-test, Spearman's rank correlation and cluster analysis with the Kruskal-Wallis test with Dunn's post-test analysis. RESULTS RA SF contained significantly elevated levels of IL-1β, IL-1ra, IL-2, IL-4, IL-8, IL-10, IL-17, IFN-γ, G-CSF, GM-CSF and TNF-α compared with other IA SF. RA patients who did not respond to anti-TNF therapy had elevated IL-6 in their SF pre-therapy (P < 0.05), whereas responders had elevated IL-2 and G-CSF (P < 0.05). Plasma cytokine concentrations were not significantly modulated by TNF inhibitors, with the exception of IL-6, which decreased after 12 weeks (P < 0.05). CONCLUSIONS Cytokine profiles in RA SF vary with treatment and response to therapy. Cytokine concentrations are significantly lower in plasma than in SF and relatively unchanged by TNF inhibitor therapy. Concentrations of IL-6, IL-2 and G-CSF in SF may predict response to TNF inhibitors.
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Carter NA, Jayasinghe SN, Mauri C. Biosprayed spleen cells integrate and function in mouse models. Analyst 2011; 136:3434-7. [DOI: 10.1039/c1an15154a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Vitale G, Mion F, Pucillo C. Regulatory B cells: evidence, developmental origin and population diversity. Mol Immunol 2010; 48:1-8. [PMID: 20950861 DOI: 10.1016/j.molimm.2010.09.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 09/06/2010] [Accepted: 09/14/2010] [Indexed: 12/14/2022]
Abstract
The adaptive immune system has developed several highly effective mechanisms in order to avoid excessive or unwanted reactions and promote resolution of immune activation. An emerging, significant body of evidence indicates that B cells can actively modulate immune responses by mechanisms that do not directly involve the production of antibodies. B cells appear to have the capacity to both induce and suppress immune effector mechanisms and they exert these functions both by contact-dependent interactions and through the secretion of cytokines. In this review we will focus on the regulatory suppressive function of several recently described B cell populations, functionally defined "regulatory B cells" or Breg cells. We will first outline the evidence that has led to their identification and then we will summarize current hypotheses on their ontogeny and possible lineage relationship.
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Affiliation(s)
- Gaetano Vitale
- Dipartimento di Scienze e Tecnologie Biomediche, University of Udine, P.le Kolbe, 4, 33100 Udine, Italy
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Moura RA, Weinmann P, Pereira PA, Caetano-Lopes J, Canhão H, Sousa E, Mourão AF, Rodrigues AM, Queiroz MV, Souto-Carneiro MM, Graça L, Fonseca JE. Alterations on peripheral blood B-cell subpopulations in very early arthritis patients. Rheumatology (Oxford) 2010; 49:1082-92. [PMID: 20211867 DOI: 10.1093/rheumatology/keq029] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To characterize circulating B-cell subpopulations of arthritis patients with <6 weeks of disease duration. METHODS Peripheral blood samples were collected from very early untreated polyarthritis patients, with <6 weeks of disease duration, for flow cytometric evaluation of B-cell subpopulations. Samples from patients who were later diagnosed as RA [very early RA (VERA)] were also collected 4-6 weeks after starting a low dose of prednisone (5-10 mg) and 4 months after reaching the minimum effective dose of MTX. A matched healthy group was used as a control. RESULTS VERA patients have a lower percentage of total peripheral blood memory B cells (CD19(+)CD27(+)) and a significant decrease in the frequency of circulating pre-switch memory B cells (CD19(+)IgD(+)CD27(+)) as compared with controls. Therapy with corticosteroids or MTX was unable to restore the normal frequencies of these B-cell subpopulations. A significant decrease in peripheral pre-switch memory B cells is equally observed in other early arthritis patients. Furthermore, no significant differences are found in the frequencies of CD4(+) and CD8(+) T cells in all patient groups. CONCLUSIONS In very early polyarthritis patients, there is a reduction in circulating pre-switch memory B cells. The reasons that may account for this effect are still unknown. Short-term corticosteroids and MTX do not seem to have a direct effect on circulating B-cell subpopulations in VERA patients.
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Affiliation(s)
- Rita A Moura
- Rheumatology Research Unit, Instituto de Medicina Molecular, Edifício Egas Moniz, Faculdade de Medicina da Universidade de Lisboa, Av. Professor Egas Moniz, 1649-028 Lisboa, Portugal
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Régent A, Bussone G, Kaveri SV, Mouthon L. [Humoral and cellular autoimmunity: from physiology to pathology]. Rev Med Interne 2009; 30:H1-8. [PMID: 19995650 DOI: 10.1016/s0248-8663(09)73166-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The recognition of self is a normal function of the immune system. A dysregulation of the tight control of auto-reactive lymphocytes in physiological conditions sometimes leads to the development of auto-immune diseases. Several recent elements bring new insights in the functioning of the immune system. Thus, the discovery of BAFF and APRIL and their receptors allow us to better understand the homeostasis and activation of B lymphocytes. The description of a new helper lineage, characterized by the secretion of IL-17 modifies the etiologic scheme of auto-immune diseases. Lastly, regulatory T lymphocytes play a major role in controlling auto-reactive lymphocytes and may participate in the genesis of auto-immune diseases. The emergence of these new data enables us to better understand the pathological mechanisms of complex auto-immunes diseases. However, further studies are necessary in order to specify the role of each one of these factors. This will enable a better targeting of treatments in order to improve the management of patients.
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Affiliation(s)
- A Régent
- UPRES EA 4058, Université Paris Descartes, Faculté de Médecine, Paris, France
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Nanki T, Takada K, Komano Y, Morio T, Kanegane H, Nakajima A, Lipsky PE, Miyasaka N. Chemokine receptor expression and functional effects of chemokines on B cells: implication in the pathogenesis of rheumatoid arthritis. Arthritis Res Ther 2009; 11:R149. [PMID: 19804625 PMCID: PMC2787286 DOI: 10.1186/ar2823] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Revised: 09/10/2009] [Accepted: 10/05/2009] [Indexed: 12/20/2022] Open
Abstract
Introduction Accumulation of B cells in the rheumatoid arthritis (RA) synovium has been reported, and it has been thought that these cells might contribute to the pathogenesis of RA by antigen presentation, autoantibody production, and/or inflammatory cytokine production. Chemokines could enhance the accumulation of B cells in the synovium. The aims of this study were to determine chemokine receptor expression by B cells both in the peripheral blood of normal donors and subjects with RA, and at the inflammatory site in RA, and the effects of chemokines on B cell activation. Methods Cell surface molecule expression was analyzed by flow cytometry. Cellular migration was assessed using chemotaxis chambers. Cellular proliferation was examined by 3H-thymidine incorporation. Tumor necrosis factor (TNF) production was assayed by enzyme-linked immunosorbent assay. Results Significant numbers of peripheral blood B cells of healthy donors and subjects with RA expressed CC chemokine receptor (CCR)5 and CXCR3, and most B cells expressed CCR6, CCR7, CXCR4 and CXCR5. CCR5 expression was more frequent on CD27+ than CD27- peripheral blood B cells of healthy donors and RA. Synovial B cells more frequently expressed CCR5, but less often expressed CCR6, CCR7 and CXCR5 compared to peripheral blood in RA. Further functional analyses were performed on peripheral blood B cells from healthy donors. Migration of peripheral blood B cells, especially CD27+ B cells, was enhanced by CC chemokine ligand (CCL)20, CCL19, CCL21 and CXCL12. All four chemokines alone induced B cell proliferation; with CCL21 being the most effective. CCL21 also enhanced the proliferation of anti-immunoglobulin (Ig)M-stimulated B cells and blockade of CCR7 inhibited this effect. CCL20, CCL21 and CXCL12 enhanced TNF production by anti-IgM mAb-stimulated B cells. Finally, stimulation with CXCL12, but not CCL20, CCL19 and CCL21, enhanced inducible costimulator-ligand (ICOSL) expression by peripheral blood B cells of healthy donors and RA, but did not increase B cell-activating factor receptor or transmembrane activator and CAML-interactor. Conclusions The data suggest that CCR5, CCR6, CCR7, CXCR3, CXCR4 and CXCR5 may be important for the B cell migration into the synovium of RA patients, and also their local proliferation, cytokine production and ICOSL expression in the synovium.
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Affiliation(s)
- Toshihiro Nanki
- Department of Medicine, Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
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Zhang J, Wang X, Fahmi H, Wojcik S, Fikes J, Yu Y, Wu J, Luo H. Role of TL1A in the pathogenesis of rheumatoid arthritis. THE JOURNAL OF IMMUNOLOGY 2009; 183:5350-7. [PMID: 19786547 DOI: 10.4049/jimmunol.0802645] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
TNF-like ligand 1A (TL1A), a member of the TNF superfamily, is the ligand of DR3 and DcR3. Several types of cells, such as endothelial cells, monocytes/macrophages, dendritic cells, and CD4 and CD8 T cells, are capable of producing this cytokine. In present study, we demonstrated that TL1A aggravated collagen-induced arthritis in mice. It increased collagen-induced arthritis penetrance and clinical scores as well as the severity of the pathological findings. TL1A administration led to the occurrence of multiple enlarged germinal centers in the spleen, and it boosted serum anti-collagen Ab titers in vivo. In vitro, TL1A augmented TNF-alpha production by T cells upon TCR ligation, and it greatly enhanced Th17 differentiation and IL-17 production. We further showed that human rheumatoid arthritis (RA) synovial fluids had elevated TL1A titers, and human chrondrocytes and synovial fibroblasts were capable of secreting TL1A upon TNF-alpha or IL-1beta stimulation. Taken together, these data suggest that TL1A secretion in lymphoid organs might contribute to RA initiation by promoting autoantibody production, and TL1A secretion stimulated by inflammatory cytokines in RA joints might be a part of a vicious circle that aggravates RA pathogenesis.
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Affiliation(s)
- Jun Zhang
- Research Center, Entre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, Montreal, Quebec, Canada
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Synovial B cells of rheumatoid arthritis express ZAP-70 which increases the survival and correlates with the inflammatory and autoimmune phenotype. Clin Immunol 2009; 131:98-108. [PMID: 19136305 DOI: 10.1016/j.clim.2008.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 11/14/2008] [Accepted: 11/20/2008] [Indexed: 01/01/2023]
Abstract
B cells have acquired an important role in the pathogenesis of rheumatoid arthritis (RA) since B cell depletion allowed to rescue patients poorly responders to TNFalpha blockers. This study focused on the involvement of ZAP-70 as a bio-marker of B cells immune activation in RA. ZAP-70 expression in synovial fluid (SF) B cells obtained from RA patients was increased compared to SF B cells of osteoarthritis (OA) patients. Moreover we found that ZAP-70 positive/CD38 positive and ZAP-70 positive/CD5 positive B cells were enriched in SF. The analysis of B cell apoptosis in vitro showed that the percentage of ZAP-70 negative B cells spontaneously undergoing apoptosis was significantly higher than ZAP-70 positive B cells. The ZAP-70 positive B cell ratio (SF/peripheral blood (PB)) showed a positive correlation with SF autoantibody levels and with local levels of BAFF and IL6. ZAP-70 positive B cells seem to define a subset characterized by increased survival and high relationship with local inflammation and autoimmunity.
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Amria S, Hajiaghamohseni LM, Harbeson C, Zhao D, Goldstein O, Blum JS, Haque A. HLA-DM negatively regulates HLA-DR4-restricted collagen pathogenic peptide presentation and T cell recognition. Eur J Immunol 2008; 38:1961-70. [PMID: 18506881 DOI: 10.1002/eji.200738100] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Rheumatoid arthritis, an autoimmune disease, is significantly associated with the HLA class II allele HLA-DR4. While the etiology of rheumatoid arthritis remains unknown, type II collagen (CII) is a candidate autoantigen. An immunodominant pathogenic epitope from this autoantigen, CII(261-273), which binds to HLA-DR4 and activates CD4+ T cells, has been identified. The non-classical class II antigen, HLA-DM, is also a key component of class II antigen presentation pathways influencing peptide presentation by HLA-DR molecules expressed on professional antigen-presenting cells (APC). Here, we investigated whether the HLA-DR4-restricted presentation of the pathogenic CII(261-273) epitope was regulated by HLA-DM expression in APC. We show that APC lacking HLA-DM efficiently display the CII(261-273) peptide/epitope to activate CD4+ T cells, and that presentation of this peptide is modulated dependent on the level of HLA-DM expression in APC. Mechanistic studies demonstrated that the CII(261-273) peptide is internalized by APC and edited by HLA-DM molecules in the recycling pathway, inhibiting peptide presentation and T cell recognition. These findings suggest that HLA-DM expression in APC controls class II-mediated CII(261-273) peptide/epitope presentation and regulates CD4+ T cell responses to this self epitope, thus potentially influencing CII-dependent autoimmunity.
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Affiliation(s)
- Shereen Amria
- Department of Microbiology and Immunology, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC 29425, USA
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The 'short' history of regulatory B cells. Trends Immunol 2007; 29:34-40. [PMID: 18289504 DOI: 10.1016/j.it.2007.10.004] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2007] [Revised: 10/22/2007] [Accepted: 10/24/2007] [Indexed: 10/22/2022]
Abstract
The maintenance of tolerance is the sine qua non of a sophisticated regulatory apparatus to prevent or dampen overzealous immune responses. In addition to the ability of B cells to prime and activate the immune system, B cells with regulatory function (Bregs) have been identified in experimental models of autoimmunity, infections, and cancer, supporting the notion that, similar to regulatory T cells (Tregs), Breg-mediated suppression is an important means for the maintenance of peripheral tolerance. This regulatory function appears to be directly mediated by the production of IL-10 and/or TGFbeta and by the ability of B cells to interact with pathogenic T cells to inhibit harmful immune responses. The identification of their existence is of great relevance to the understanding of autoimmune diseases and to the development of new therapeutic strategies.
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