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Piper CJM, Wilkinson MGL, Deakin CT, Otto GW, Dowle S, Duurland CL, Adams S, Marasco E, Rosser EC, Radziszewska A, Carsetti R, Ioannou Y, Beales PL, Kelberman D, Isenberg DA, Mauri C, Nistala K, Wedderburn LR. CD19 +CD24 hiCD38 hi B Cells Are Expanded in Juvenile Dermatomyositis and Exhibit a Pro-Inflammatory Phenotype After Activation Through Toll-Like Receptor 7 and Interferon-α. Front Immunol 2018; 9:1372. [PMID: 29988398 PMCID: PMC6024011 DOI: 10.3389/fimmu.2018.01372] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 06/04/2018] [Indexed: 01/12/2023] Open
Abstract
Juvenile dermatomyositis (JDM) is a rare form of childhood autoimmune myositis that presents with proximal muscle weakness and skin rash. B cells are strongly implicated in the pathogenesis of the disease, but the underlying mechanisms are unknown. Therefore, the main objective of our study was to investigate mechanisms driving B cell lymphocytosis and define pathological features of B cells in JDM patients. Patients were recruited through the UK JDM Cohort and Biomarker study. Peripheral blood B cell subpopulations were immunophenotyped by flow cytometry. The results identified that immature transitional B cells were significantly expanded in active JDM, actively dividing, and correlated positively with disease activity. Protein and RNAseq analysis revealed high interferon alpha (IFNα) and TLR7-pathway signatures pre-treatment. Stimulation of B cells through TLR7/8 promoted both IL-10 and IL-6 production in controls but failed to induce IL-10 in JDM patient cells. Interrogation of the CD40–CD40L pathway (known to induce B cell IL-10 and IL-6) revealed similar expression of IL-10 and IL-6 in B cells cultured with CD40L from both JDM patients and controls. In conclusion, JDM patients with active disease have a significantly expanded immature transitional B cell population which correlated with the type I IFN signature. Activation through TLR7 and IFNα may drive the expansion of immature transitional B cells in JDM and skew the cells toward a pro-inflammatory phenotype.
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Affiliation(s)
| | - Meredyth G Ll Wilkinson
- Centre for Rheumatology, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology, Arthritis Research UK, University College London Hospital and Great Ormond Street Hospital, London, United Kingdom
| | - Claire T Deakin
- Centre for Adolescent Rheumatology, Arthritis Research UK, University College London Hospital and Great Ormond Street Hospital, London, United Kingdom.,Infection, Inflammation and Rheumatology Section, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom
| | - Georg W Otto
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom.,Experimental and Personalised Medicine, Genetics and Genomic Medicine, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Stefanie Dowle
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom.,Experimental and Personalised Medicine, Genetics and Genomic Medicine, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Chantal L Duurland
- Infection, Inflammation and Rheumatology Section, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Stuart Adams
- Haematology, Specialist Integrated Haematological Malignancy Diagnostic Service (SIHMDS), Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Emiliano Marasco
- B Cell Physiopathology Unit, Immunology Research Area, Ospedale Pediatrico Bambino Gesù IRCSS, Rome, Italy
| | - Elizabeth C Rosser
- Infection, Inflammation and Rheumatology Section, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Anna Radziszewska
- Centre for Rheumatology, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology, Arthritis Research UK, University College London Hospital and Great Ormond Street Hospital, London, United Kingdom
| | - Rita Carsetti
- B Cell Physiopathology Unit, Immunology Research Area, Ospedale Pediatrico Bambino Gesù IRCSS, Rome, Italy
| | - Yiannis Ioannou
- Centre for Rheumatology, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology, Arthritis Research UK, University College London Hospital and Great Ormond Street Hospital, London, United Kingdom
| | - Philip L Beales
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom.,Experimental and Personalised Medicine, Genetics and Genomic Medicine, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Daniel Kelberman
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom.,Experimental and Personalised Medicine, Genetics and Genomic Medicine, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom
| | - David A Isenberg
- Centre for Rheumatology, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology, Arthritis Research UK, University College London Hospital and Great Ormond Street Hospital, London, United Kingdom
| | - Claudia Mauri
- Centre for Rheumatology, University College London, London, United Kingdom
| | - Kiran Nistala
- Centre for Rheumatology, University College London, London, United Kingdom
| | - Lucy R Wedderburn
- Centre for Adolescent Rheumatology, Arthritis Research UK, University College London Hospital and Great Ormond Street Hospital, London, United Kingdom.,Infection, Inflammation and Rheumatology Section, University College London, Great Ormond Street Institute of Child Health, London, United Kingdom.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom
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Soponkanaporn S, Deakin CT, Schutz PW, Marshall LR, Yasin SA, Johnson CM, Sag E, Tansley SL, McHugh NJ, Wedderburn LR, Jacques TS. Expression of myxovirus-resistance protein A: a possible marker of muscle disease activity and autoantibody specificities in juvenile dermatomyositis. Neuropathol Appl Neurobiol 2018; 45:410-420. [PMID: 29770465 PMCID: PMC6563435 DOI: 10.1111/nan.12498] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/01/2018] [Indexed: 12/15/2022]
Abstract
Aims To evaluate the relationship between expression of myxovirus‐resistance protein A (MxA) protein on muscle biopsies by immunohistochemistry and disease activity in juvenile dermatomyositis (JDM) patients. Also, another aim was to investigate whether the expression of MxA is related with myositis‐specific autoantibodies (MSA) status in JDM patients. Methods 103 patients (median aged 6.3, interquartile range 0.5–15.9) enrolled in the Juvenile Dermatomyositis Cohort and Biomarker Study (JDCBS). Muscle biopsies were stained with MxA and scored. Clinical data at initial presentation were collected and autoantibodies were analysed. Multiple linear regression analysis was performed to estimate the association between MxA expression on muscle fibres and muscle disease activity, and MSA status. Results Expression of MxA protein on JDM samples was identified in 61.2%. There was a significant association between MxA scores and Childhood Myositis Assessment Scale (CMAS) (P = 0.002), and Manual Muscle Testing of Eight Muscles (MMT8) (P = 0.026). CMAS and MMT8 scores were significantly lower in the group of patients with strong MxA expression. MxA scores differed according to MSA subgroups (P = 0.002). Patients with positive nuclear matrix protein 2 autoantibodies had strong MxA expression, whereas anti‐melanoma differentiation‐associated gene 5 positive patients had no or weak MxA expression. Conclusions This study reveals the significant association between level of MxA expression on muscle fibres and clinical measures of muscular disease activity in JDM patients and MSA status. This confirms type I interferonopathies in muscle fibres of JDM patients which could help with improving treatment outcome in JDM patients and underscoring the distinct pathophysiological pathways in different MSA status.
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Affiliation(s)
- S Soponkanaporn
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK.,Division of Rheumatology, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - C T Deakin
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - P W Schutz
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK.,Division of Neuropathology, Vancouver General Hospital, Vancouver, BC, Canada.,Department of Pathology, University of British Columbia, Vancouver, BC, Canada
| | - L R Marshall
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - S A Yasin
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - C M Johnson
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - E Sag
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK.,Department of Pediatric Rheumatology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - S L Tansley
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - N J McHugh
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - L R Wedderburn
- Infection, Immunity and Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, UK.,Rheumatology Unit, Great Ormond Street Hospital for Children, London, UK.,NIHR Biomedical Research Centre at Great Ormond Street Hospital for Children, NHS Foundation Trust and University College London, London, UK.,Arthritis Research UK Centre for Adolescent Rheumatology at UCL, UCLH and GOSH, London, UK
| | - T S Jacques
- Developmental Biology and Cancer Programme, UCL Great Ormond Street Institute of Child Health, London, UK
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Nistala K, Varsani H, Wittkowski H, Vogl T, Krol P, Shah V, Mamchaoui K, Brogan PA, Roth J, Wedderburn LR. Myeloid related protein induces muscle derived inflammatory mediators in juvenile dermatomyositis. Arthritis Res Ther 2013; 15:R131. [PMID: 24286299 PMCID: PMC3978554 DOI: 10.1186/ar4311] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Accepted: 09/02/2013] [Indexed: 12/11/2022] Open
Abstract
Introduction The aetiopathogenesis of juvenile dermatomyositis (JDM) remains poorly understood. In particular the contribution of monocytes or macrophages, which are frequently observed to be an infiltrate within muscle tissue very early in the disease process, is unknown. We hypothesised that these cells secrete the pro-inflammatory myeloid related protein (MRP) 8/14 which may then contribute to muscle pathology in JDM. Methods In this study of 56 JDM patients, serum MRP8/14 levels were compared with clinical measures of disease activity. Muscle biopsies taken early in disease were assessed by immunohistochemistry to determine the frequency and identity of MRP-expressing cells. The effects of MRP stimulation and endoplasmic reticulum (ER) stress on muscle were tested in vitro. Serum or supernatant levels of cytokines were analyzed by multiplex immunoassay. Results Serum MRP8/14 correlated with physician’s global assessment of disease activity in JDM (R = 0.65, p = 0.0003) and muscle strength/endurance, childhood myositis assessment score (CMAS, R = −0.55, p = 0.004). MRP8/14 was widely expressed by CD68+ macrophages in JDM muscle tissue. When cultured with human myoblasts, MRP8 led to the secretion of MCP-1 and IL-6, which was enhanced by ER stress. Both inflammatory mediators were detected in significantly higher levels in the serum of JDM patients compared to healthy controls. Conclusions This study is the first to identify serum MRP8/14 as a potential biomarker for disease activity in JDM. We propose that tissue infiltrating macrophages secreting MRP8/14 may contribute to myositis, by driving the local production of cytokines directly from muscle.
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Sallum AME, Varsani H, Holton JL, Marie SKN, Wedderburn LR. Morphometric analyses of normal pediatric brachial biceps and quadriceps muscle tissue. Histol Histopathol 2013; 28:525-30. [PMID: 23392619 DOI: 10.14670/hh-28.525] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pediatric normal brachial biceps (14 specimens) and quadriceps muscles (14 specimens) were studied by immunohistochemistry to quantify fiber-type, diameter and distribution, capillary density, presence of inflammatory cells (CD3, CD20, CD68) and expression of neonatal myosin and MHC class 1 proteins. Brachial biceps showed more fast-twitch fibers and lower capillary/fiber ratio than quadriceps. The mean diameter of both fiber types was smaller in biceps than quadriceps. Fast-fibers were smaller than slow-fibers, and capillary/fiber ratio was < 1.0 in both muscles. Fiber size and capillary / fiber ratio increased with age. Normal limits for infiltrating haematopoietic cells were <4 T lymphocytes, or CD68+ cells, very few B cells, < 6 neonatal myosin positive fibers, and no fibers MHC class 1 positive in one x20 field, for both muscles. The present comparison of quantitative findings between brachial biceps and quadriceps may allow standardization of the assessment of pathological changes in both pediatric muscles.
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Affiliation(s)
- Adriana M E Sallum
- Department of Pediatrics, Children Institute, School of Medicine, University of Sao Paulo, Sao Paulo, Brasil
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Ye Y, van Zyl B, Varsani H, Wedderburn LR, Ramanan A, Gillespie KM. Maternal microchimerism in muscle biopsies from children with juvenile dermatomyositis. Rheumatology (Oxford) 2012; 51:987-91. [PMID: 22271755 PMCID: PMC3354676 DOI: 10.1093/rheumatology/ker430] [Citation(s) in RCA: 18] [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: 06/08/2011] [Revised: 11/22/2011] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Recent advances in molecular techniques have revealed that there is bi-directional transfer of cells between mother and child during pregnancy, and the presence of a mother's cells in her child has been termed maternal microchimerism (MMc). There is the potential for maternal cells to provoke inappropriate immune responses in the child, which could be a factor in autoimmunity including JDM. The aim of this study was to determine whether maternal (female) cells could be detected in frozen muscle sections from seven males (age range 3-13 years) with JDM participating in the Juvenile Dermatomyositis National (U.K. and Ireland) Cohort Biomarker Study and Repository for Idiopathic Inflammatory Myopathies and sections of muscle controls (age range 2-12 years). METHODS At least 1000 cells from each section underwent FISH and confocal imaging through each nucleus. Concomitant IF for CD45 was used to determine whether MMc in muscle were lymphocytes. A non-parametric Mann-Whitney U-test was used to detect statistical differences. RESULTS The frequency of MMc was higher in JDM muscle (0.42-1.14%) than in controls (0.08-0.42%) P = 0.01. No CD45+ MMc were observed. CONCLUSION These data confirm an increased frequency of MMc in JDM. More detailed characterization of MMc is required, particularly using phenotypic markers, to explain the role of these cells in JDM.
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Affiliation(s)
- Yi Ye
- School of Clinical Sciences, University of Bristol, Bristol and Department of Rheumatology, Institute of Child Health, University College London, London, UK
| | - Berendine van Zyl
- School of Clinical Sciences, University of Bristol, Bristol and Department of Rheumatology, Institute of Child Health, University College London, London, UK
| | - Hemlata Varsani
- School of Clinical Sciences, University of Bristol, Bristol and Department of Rheumatology, Institute of Child Health, University College London, London, UK
| | - Lucy R. Wedderburn
- School of Clinical Sciences, University of Bristol, Bristol and Department of Rheumatology, Institute of Child Health, University College London, London, UK
| | - Athimalaipet Ramanan
- School of Clinical Sciences, University of Bristol, Bristol and Department of Rheumatology, Institute of Child Health, University College London, London, UK
| | - Kathleen M. Gillespie
- School of Clinical Sciences, University of Bristol, Bristol and Department of Rheumatology, Institute of Child Health, University College London, London, UK
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Martin N, Krol P, Smith S, Murray K, Pilkington CA, Davidson JE, Wedderburn LR. A national registry for juvenile dermatomyositis and other paediatric idiopathic inflammatory myopathies: 10 years' experience; the Juvenile Dermatomyositis National (UK and Ireland) Cohort Biomarker Study and Repository for Idiopathic Inflammatory Myopathies. Rheumatology (Oxford) 2010; 50:137-45. [PMID: 20823094 PMCID: PMC2999955 DOI: 10.1093/rheumatology/keq261] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVES The paediatric idiopathic inflammatory myopathies (IIMs) are a group of rare chronic inflammatory disorders of childhood, affecting muscle, skin and other organs. There is a severe lack of evidence base for current treatment protocols in juvenile myositis. The rarity of these conditions means that multicentre collaboration is vital to facilitate studies of pathogenesis, treatment and disease outcomes. We have established a national registry and repository for childhood IIM, which aims to improve knowledge, facilitate research and clinical trials, and ultimately to improve outcomes for these patients. METHODS A UK-wide network of centres and research group was established to contribute to the study. Standardized patient assessment, data collection forms and sample protocols were agreed. The Biobank includes collection of peripheral blood mononuclear cells, serum, genomic DNA and biopsy material. An independent steering committee was established to oversee the use of data/samples. Centre training was provided for patient assessment, data collection and entry. RESULTS Ten years after inception, the study has recruited 285 children, of which 258 have JDM or juvenile PM; 86% of the cases have contributed the biological samples. Serial sampling linked directly to the clinical database makes this a highly valuable resource. The study has been a platform for 20 sub-studies and attracted considerable funding support. Assessment of children with myositis in contributing centres has changed through participation in this study. CONCLUSIONS This establishment of a multicentre registry and Biobank has facilitated research and contributed to progress in the management of a complex group of rare muscloskeletal conditions.
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Affiliation(s)
- Neil Martin
- Rheumatology Unit, UCL Institute of Child Health, Great Ormond Street Hospital, 30 Guilford Street, University College London, London WC1N 1EH, UK
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