1
|
Fan J, Li X, Yang J, Zhang S, Qu HQ, Ji D, Glessner JT, Hao J, Ding Z, Wang N, Meng X, Xia Q, Hakonarson H, Wei W, Li J. Revealing novel genomic insights and therapeutic targets for juvenile idiopathic arthritis through omics. Rheumatology (Oxford) 2024; 63:SI249-SI259. [PMID: 38317060 DOI: 10.1093/rheumatology/keae078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 12/22/2023] [Accepted: 01/10/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND The genetic architecture of JIA remains only partially comprehended. There is a clear imperative for continued endeavours to uncover insights into the underlying causes of JIA. METHODS This study encompassed a comprehensive spectrum of endeavours, including conducting a JIA genome-wide association study (GWAS) meta-analysis that incorporated data from 4550 JIA cases and 18 446 controls. We employed in silico and genome-editing approaches to prioritizing target genes. To investigate pleiotropic effects, we conducted phenome-wide association studies. Cell-type enrichment analyses were performed by integrating bulk and single-cell sequencing data. Finally, we delved into potential druggable targets for JIA. RESULTS Fourteen genome-wide significant non-HLA loci were identified, including four novel loci, each exhibiting pleiotropic associations with other autoimmune diseases or musculoskeletal traits. We uncovered strong genetic correlation between JIA and BMD traits at 52 genomic regions, including three GWAS loci for JIA. Candidate genes with immune functions were captured by in silico analyses at each novel locus, with additional findings identified through our experimental approach. Cell-type enrichment analysis revealed 21 specific immune cell types crucial for the affected organs in JIA, indicating their potential contribution to the disease. Finally, 24 known or candidate druggable target genes were prioritized. CONCLUSIONS Our identification of four novel JIA-associated genes, CD247, RHOH, COLEC10 and IRF8, broadens the novel potential drug repositioning opportunities. We established a new genetic link between COLEC10, TNFRSF11B and JIA/BMD. Additionally, the identification of RHOH underscores its role in positive thymocyte selection, thereby illuminating a critical facet of JIA's underlying biological mechanisms.
Collapse
Affiliation(s)
- Jingxian Fan
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
- Department of Bioinformatics, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Xiumei Li
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Jie Yang
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Sipeng Zhang
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Hui-Qi Qu
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Dandan Ji
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Joseph T Glessner
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jian Hao
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhiyong Ding
- Mills Institute for Personalized Cancer Care, Fynn Biotechnologies Ltd., Jinan, China
| | - Nan Wang
- Mills Institute for Personalized Cancer Care, Fynn Biotechnologies Ltd., Jinan, China
| | - Xinyi Meng
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Qianghua Xia
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
- Department of Bioinformatics, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Hakon Hakonarson
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Wei Wei
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jin Li
- Department of Cell Biology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Key Laboratory of Medical Epigenetics, Tianjin Institute of Immunology, Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
| |
Collapse
|
2
|
Kosarek NN, Preston EV. Contributions of Synthetic Chemicals to Autoimmune Disease Development and Occurrence. Curr Environ Health Rep 2024; 11:128-144. [PMID: 38653907 DOI: 10.1007/s40572-024-00444-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2024] [Indexed: 04/25/2024]
Abstract
PURPOSE OF REVIEW Exposure to many synthetic chemicals has been linked to a variety of adverse human health effects, including autoimmune diseases. In this scoping review, we summarize recent evidence detailing the effects of synthetic environmental chemicals on autoimmune diseases and highlight current research gaps and recommendations for future studies. RECENT FINDINGS We identified 68 recent publications related to environmental chemical exposures and autoimmune diseases. Most studies evaluated exposure to persistent environmental chemicals and autoimmune conditions including rheumatoid arthritis (RA), systemic lupus (SLE), systemic sclerosis (SSc), and ulcerative colitis (UC) and Crohn's disease. Results of recent original research studies were mixed, and available data for some exposure-outcome associations were particularly limited. PFAS and autoimmune inflammatory bowel diseases (UC and CD) and pesticides and RA appeared to be the most frequently studied exposure-outcome associations among recent publications, despite a historical research focus on solvents. Recent studies have provided additional evidence for the associations of exposure to synthetic chemicals with certain autoimmune conditions. However, impacts on other autoimmune outcomes, particularly less prevalent conditions, remain unclear. Owing to the ubiquitous nature of many of these exposures and their potential impacts on autoimmune risk, additional studies are needed to better evaluate these relationships, particularly for understudied autoimmune conditions. Future research should include larger longitudinal studies and studies among more diverse populations to elucidate the temporal relationships between exposure-outcome pairs and to identify potential population subgroups that may be more adversely impacted by immune modulation caused by exposure to these chemicals.
Collapse
Affiliation(s)
- Noelle N Kosarek
- Department of Biomedical Data Science, Dartmouth College, Hanover, NH, 03755, USA
| | - Emma V Preston
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 665 Huntington Avenue, Building 1, Floor 14, Boston, MA, 02115, USA.
| |
Collapse
|
3
|
Shoop-Worrall SJW, Macintyre VG, Ciurtin C, Cleary G, McErlane F, Wedderburn LR, Hyrich KL. Overlap of International League of Associations for Rheumatology and Preliminary Pediatric Rheumatology International Trials Organization Classification Criteria for Nonsystemic Juvenile Idiopathic Arthritis in an Established UK Multicentre Inception Cohort. Arthritis Care Res (Hoboken) 2024; 76:831-840. [PMID: 38212149 DOI: 10.1002/acr.25296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/29/2023] [Accepted: 01/09/2024] [Indexed: 01/13/2024]
Abstract
OBJECTIVE The goal was to assess the degree of overlap between existing International League of Associations for Rheumatology (ILAR) and preliminary Paediatric Rheumatology International Trials Organisation (PRINTO) classification criteria for juvenile idiopathic arthritis (JIA). METHODS Participants from the Childhood Arthritis Prospective Study, a multicenter UK JIA inception cohort, were classified using the PRINTO and ILAR classification criteria into distinct categories. Systemic JIA was excluded because several classification items were not collected in this cohort. Adaptations to PRINTO criteria were required to apply to a UK health care setting, including limiting the number of blood biomarker tests required. The overlap between categories under the two systems was determined, and any differences in characteristics between groups were described. RESULTS A total of 1,223 children and young people with a physician's diagnosis of JIA were included. Using PRINTO criteria, the majority of the patients had "other JIA" (69.5%). There was a high degree of overlap (91%) between the PRINTO enthesitis/spondylitis- and ILAR enthesitis-related JIA categories. The PRINTO rheumatoid factor (RF)-positive category was composed of 48% ILAR RF-positive polyarthritis and 52% undifferentiated JIA. The early-onset antinuclear antibodies-positive PRINTO category was largely composed of ILAR oligoarthritis (50%), RF-negative polyarthritis (24%), and undifferentiated JIA (23%). A few patients were unclassified under PRINTO (n = 3) and would previously have been classified as enthesitis-related JIA (n = 1) and undifferentiated JIA (n = 2) under ILAR. CONCLUSION Under the preliminary PRINTO classification criteria for childhood arthritis, most children are not yet classified into a named category. These data can help support further delineation of the PRINTO criteria to ensure homogenous groups of children can be identified.
Collapse
Affiliation(s)
| | | | - Coziana Ciurtin
- University College London, University College London Hospital, and Great Ormond Street Hospital, London, UK
| | | | - Flora McErlane
- Newcastle Hospitals NHS Foundation Trust, Newcastle Upon Tyne, UK
| | - Lucy R Wedderburn
- University College London, University College London Hospital, Great Ormond Street Hospital, and Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - Kimme L Hyrich
- The University of Manchester and Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| |
Collapse
|
4
|
Sabounji MM, Lissimo H, Deme A. Childhood-onset rheumatoid arthritis at a tertiary hospital in Senegal, West Africa. Pediatr Rheumatol Online J 2023; 21:98. [PMID: 37700346 PMCID: PMC10496368 DOI: 10.1186/s12969-023-00889-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 08/31/2023] [Indexed: 09/14/2023] Open
Abstract
BACKGROUND Childhood-onset rheumatoid arthritis (CORA), known as rheumatoid factor (RF)-positive juvenile idiopathic arthritis is a type of juvenile idiopathic arthritis that shares the same genetic factors and clinical features as adult-onset rheumatoid arthritis. In Africa, CORA hasn't been the subject of a specific study. OBJECTIVES The aim of this study is to describe the clinical features, disease activity, functional disability, and treatment of CORA at diagnosis in Senegal and compare the findings to other CORA populations. METHODS We conducted a mixed cohort study by reviewing the medical records of patients diagnosed with CORA with an age of symptom onset < 18 years according to the 2019 PRINTO provisional criteria for RF-positive JIA from January 2020 to December 2022 at rheumatology department of Aristide Le Dantec Hospital in Dakar, Senegal. We collected demographic, clinical, paraclinical and therapeutic data. Disease activity score was assessed by DAS28-ESR and DAS28-CRP. Functional disability was assessed using Health Assessment Questionnaire (HAQ) or Childhood HAQ. RESULTS A total of 21 patients were included. Eighteen (85.7%) were Females. The mean age at symptom onset was 13.0 ± 3.0 years, and at diagnosis was 16.4 ± 4.2 years. Morning stiffness, joint swelling, and joint deformities were found in 20, 18 and 13 patients respectively. Four patients had a family history of rheumatoid arthritis. Five patients had extra-articular involvement such as rheumatoid nodules. Two patients had interstitial lung disease. The biological inflammatory syndrome was found in 90% of cases. 16 of 21 (76.2%) patients had positive RF, and 18 of 20 (90%) patients had positive Anti-CCP. Seven of 12 (58.3%) patients had positive anti-nuclear antibodies. The mean DAS28-ESR was 5.7 ± 1.0. Fifteen (71.4%) patients had high disease activity (DAS28-ESR > 5.1). The mean DAS28-CRP was 5.4 ± 1.1. The median HAQ was 2.12 with a mean HAQ of 1.9. Nineteen (90.5%) patients were treated with methotrexate, while 17 (81%) had a combination of methotrexate and hydroxychloroquine. Oral prednisone was used in 17 (81%) cases. Non-steroidal anti-inflammatory drugs were used in 4 cases (19%). After 6 months of treatment, mean DAS28-CRP was 2.9. CONCLUSION In our study, CORA mainly affects 13-year-old girls, characterised by high disease activity with joint deformity and significant functional impairment. Treatment is mainly based on methotrexate, prednisone and hydroxychloroquine. Further studies are needed to determine the exact clinical phenotype of this disease.
Collapse
Affiliation(s)
- Mounib M. Sabounji
- Department of Rheumatology, Aristide Le Dantec Hospital, Dakar, Senegal
- Department of Rheumatology, COUD Hospital, UCAD, Dakar, Senegal
| | | | - Amina Deme
- Department of Rheumatology, Aristide Le Dantec Hospital, Dakar, Senegal
| |
Collapse
|
5
|
Hart DA. Sex differences in musculoskeletal injury and disease risks across the lifespan: Are there unique subsets of females at higher risk than males for these conditions at distinct stages of the life cycle? Front Physiol 2023; 14:1127689. [PMID: 37113695 PMCID: PMC10126777 DOI: 10.3389/fphys.2023.1127689] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/28/2023] [Indexed: 04/29/2023] Open
Abstract
Sex differences have been reported for diseases of the musculoskeletal system (MSK) as well as the risk for injuries to tissues of the MSK system. For females, some of these occur prior to the onset of puberty, following the onset of puberty, and following the onset of menopause. Therefore, they can occur across the lifespan. While some conditions are related to immune dysfunction, others are associated with specific tissues of the MSK more directly. Based on this life spectrum of sex differences in both risk for injury and onset of diseases, a role for sex hormones in the initiation and progression of this risk is somewhat variable. Sex hormone receptor expression and functioning can also vary with life events such as the menstrual cycle in females, with different tissues being affected. Furthermore, some sex hormone receptors can affect gene expression independent of sex hormones and some transitional events such as puberty are accompanied by epigenetic alterations that can further lead to sex differences in MSK gene regulation. Some of the sex differences in injury risk and the post-menopausal disease risk may be "imprinted" in the genomes of females and males during development and sex hormones and their consequences only modulators of such risks later in life as the sex hormone milieu changes. The purpose of this review is to discuss some of the relevant conditions associated with sex differences in risks for loss of MSK tissue integrity across the lifespan, and further discuss several of the implications of their variable relationship with sex hormones, their receptors and life events.
Collapse
|
6
|
Falkenstein DK, Jarvis JN. Health inequities in the rheumatic diseases of childhood. Curr Opin Rheumatol 2022; 34:262-266. [PMID: 35797523 DOI: 10.1097/bor.0000000000000893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW To describe differences in disease manifestations and outcomes in pediatric rheumatic diseases as they occur in non-European-descended populations in North America. RECENT FINDINGS Differences in disease prevalence, clinical phenotypes, disease course, and outcomes have been described across the spectrum of pediatric-onset rheumatic diseases. Although these differences are commonly explained by differences in genetic risk or access to tertiary healthcare facilities, our emerging understanding of the immunobiology of historical/ongoing trauma suggest a more complex explanation for these observed differences. SUMMARY Health inequities as observed in pediatric rheumatic diseases are likely to emerge from a complex interplay between social and biological factors. The important contribution of historical and repetitive trauma deserves further exploration.
Collapse
Affiliation(s)
| | - James N Jarvis
- Department of Pediatrics
- Genetics, Genomics, & Bioinformatics Program, University at Buffalo, Buffalo, New York, USA
| |
Collapse
|
7
|
Li J, Li YR, Glessner JT, Yang J, March ME, Kao C, Vaccaro CN, Bradfield JP, Li J, Mentch FD, Qu H, Qi X, Chang X, Hou C, Abrams DJ, Qiu H, Wei Z, Connolly JJ, Wang F, Snyder J, Flatø B, Thompson SD, Langefeld CD, Lie BA, Munro JE, Wise C, Sleiman PMA, Hakonarson H. Identification of Novel Loci Shared by Juvenile Idiopathic Arthritis Subtypes Through Integrative Genetic Analysis. Arthritis Rheumatol 2022; 74:1420-1429. [PMID: 35347896 PMCID: PMC9542075 DOI: 10.1002/art.42129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 03/11/2022] [Accepted: 03/25/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Juvenile idiopathic arthritis (JIA) is the most common chronic immune-mediated joint disease among children and encompasses a heterogeneous group of immune-mediated joint disorders classified into 7 subtypes according to clinical presentation. However, phenotype overlap and biologic evidence suggest a shared mechanistic basis between subtypes. This study was undertaken to systematically investigate shared genetic underpinnings of JIA subtypes. METHODS We performed a heterogeneity-sensitive genome-wide association study encompassing a total of 1,245 JIA cases (classified into 7 subtypes) and 9,250 controls, followed by fine-mapping of candidate causal variants at each genome-wide significant locus, functional annotation, and pathway and network analysis. We further identified candidate drug targets and drug repurposing opportunities by in silico analyses. RESULTS In addition to the major histocompatibility complex locus, we identified 15 genome-wide significant loci shared between at least 2 JIA subtypes, including 10 novel loci. Functional annotation indicated that candidate genes at these loci were expressed in diverse immune cell types. CONCLUSION This study identified novel genetic loci shared by JIA subtypes. Our findings identified candidate mechanisms underlying JIA subtypes and candidate targets with drug repurposing opportunities for JIA treatment.
Collapse
Affiliation(s)
- Jin Li
- Department of Cell Biology, the Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical Sciences, Tianjin Medical UniversityTianjinChina
| | - Yun R. Li
- The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, City of Hope Comprehensive Cancer Center, Duarte, California, and Translational Genomics Research InstitutePhoenixArizona
| | | | - Jie Yang
- Department of Cell Biology, the Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical Sciences, Tianjin Medical UniversityTianjinChina
| | | | - Charlly Kao
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | | | | | - Junyi Li
- Department of Cell Biology, the Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical Sciences, Tianjin Medical UniversityTianjinChina
| | - Frank D. Mentch
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Hui‐Qi Qu
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Xiaohui Qi
- Department of Cell Biology, the Province and Ministry Co‐sponsored Collaborative Innovation Center for Medical EpigeneticsSchool of Basic Medical Sciences, Tianjin Medical UniversityTianjinChina
| | - Xiao Chang
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Cuiping Hou
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Debra J. Abrams
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Haijun Qiu
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Zhi Wei
- New Jersey Institute of TechnologyNewark
| | | | - Fengxiang Wang
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - James Snyder
- The Children's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Berit Flatø
- Oslo University HospitalRikshospitaletOsloNorway
| | - Susan D. Thompson
- University of Cincinnati College of Medicine and Cincinnati Children's Hospital Medical CenterCincinnatiOhio
| | - Carl D. Langefeld
- Wake Forest University School of MedicineWinston‐SalemNorth Carolina
| | | | | | | | | | - Hakon Hakonarson
- The Children's Hospital of Philadelphia and University of PennsylvaniaPhiladelphia
| |
Collapse
|
8
|
Miyamae T, Inoue E, Tanaka E, Kawabe T, Ikari K, Harigai M. Association of Disease Activity Using SDAI and DAS-28, but not JADAS-27, with Subsequent Changes in Physical Function in Adult Patients with Juvenile Idiopathic Arthritis. Mod Rheumatol 2022; 33:588-593. [PMID: 35713223 DOI: 10.1093/mr/roac063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/05/2022] [Accepted: 06/14/2022] [Indexed: 11/14/2022]
Abstract
OBJECTIVES To investigate an optimal composite score for disease activity in adult juvenile idiopathic arthritis (JIA) from the viewpoint of the subsequent changes in physical function. METHODS Patients with JIA under the following conditions were enrolled: 1) disease onset < 18 years; 2) registered in the Institute of Rheumatology, Rheumatoid Arthritis database by Tokyo Women's Medical University for the first time between 2000 and 2020; and 3) ≥18 years old at the time of registration. The baseline of each patient was their initial entry into the database. The Simplified Disease Activity Index (SDAI), Disease Activity Score using 28 joints (DAS28), and Juvenile Arthritis Disease Activity Score (JADAS)-27 were compared. Patients were stratified according to mean disease activity scores in each index during the first year from baseline. Trends of estimated mean change in Japanese-HAQ score (ΔJ-HAQ) from baseline to 2 years later was examined across the stratified groups of each index. RESULTS We included 294 eligible individuals (median age at onset, 14.0 years; rheumatoid factor positive in 64.7%). A significant increasing trend of the estimated mean ΔJ-HAQ at 2 years after baseline was observed along with an increase in the mean disease activity during the first year measured using DAS28 (p = 0.01) and SDAI (p = 0.018), but not using JADAS-27. CONCLUSIONS Disease activity measured using SDAI and DAS28, but not using JADAS27, was significantly associated with subsequent changes in physical function in transitional and adult patients with JIA.
Collapse
Affiliation(s)
- Takako Miyamae
- Department of Pediatric Rheumatology, Institute of Rheumatology, Tokyo Women's Medical University Hospital, Tokyo, Japan.,Division of Rheumatology, Department of Internal Medicine, Tokyo Women's Medical University School of Medicine, Tokyo, Japan
| | - Eisuke Inoue
- Division of Rheumatology, Department of Internal Medicine, Tokyo Women's Medical University School of Medicine, Tokyo, Japan.,Research Administration Center, Showa University, Tokyo, Japan
| | - Eiichi Tanaka
- Division of Rheumatology, Department of Internal Medicine, Tokyo Women's Medical University School of Medicine, Tokyo, Japan.,Department of Rheumatology, Institute of Rheumatology, Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - Tomohiro Kawabe
- Department of Pediatric Rheumatology, Institute of Rheumatology, Tokyo Women's Medical University Hospital, Tokyo, Japan.,Division of Rheumatology, Department of Internal Medicine, Tokyo Women's Medical University School of Medicine, Tokyo, Japan
| | - Katsunori Ikari
- Division of Multidisciplinary Management of Rheumatic Diseases, Tokyo Women's Medical University School of Medicine, Tokyo, Japan.,Department of Orthopedic Surgery, Institute of Rheumatology, Tokyo Women's Medical University Hospital, Tokyo, Japan
| | - Masayoshi Harigai
- Division of Rheumatology, Department of Internal Medicine, Tokyo Women's Medical University School of Medicine, Tokyo, Japan.,Department of Rheumatology, Institute of Rheumatology, Tokyo Women's Medical University Hospital, Tokyo, Japan
| |
Collapse
|
9
|
Implications of Evolving Disease Classification for Drug Approval in Juvenile Idiopathic Arthritis. Paediatr Drugs 2022; 24:185-191. [PMID: 35364780 PMCID: PMC10389810 DOI: 10.1007/s40272-022-00496-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/21/2022] [Indexed: 10/18/2022]
Abstract
The classification of inflammatory arthritis incorporates a sharp divide between diseases of childhood onset, grouped together as juvenile idiopathic arthritis, and diseases such as rheumatoid arthritis that begin by definition in adulthood. An important consequence of this divide is that regulatory authorities and many rheumatologists regard pediatric and adult arthritides as truly different, with the implication that drugs should be evaluated separately for each category. However, it is now clear that most forms of arthritis transcend the pediatric/adult boundary and that agents generally exhibit comparable success irrespective of age of onset, offering new opportunities in drug development and regulation focused on pharmacology and safety rather than efficacy. This paradigm shift will enable advances in arthritis treatment, originating either with adults or children, to translate more rapidly across the age spectrum.
Collapse
|
10
|
Moura RA, Fonseca JE. B Cells on the Stage of Inflammation in Juvenile Idiopathic Arthritis: Leading or Supporting Actors in Disease Pathogenesis? Front Med (Lausanne) 2022; 9:851532. [PMID: 35449805 PMCID: PMC9017649 DOI: 10.3389/fmed.2022.851532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/09/2022] [Indexed: 11/13/2022] Open
Abstract
Juvenile idiopathic arthritis (JIA) is a term that collectively refers to a group of chronic childhood arthritides, which together constitute the most common rheumatic condition in children. The International League of Associations for Rheumatology (ILAR) criteria define seven categories of JIA: oligoarticular, polyarticular rheumatoid factor (RF) negative (RF-), polyarticular RF positive (RF+), systemic, enthesitis-related arthritis, psoriatic arthritis, and undifferentiated arthritis. The ILAR classification includes persistent and extended oligoarthritis as subcategories of oligoarticular JIA, but not as distinct categories. JIA is characterized by a chronic inflammatory process affecting the synovia that begins before the age of 16 and persists at least 6 weeks. If not treated, JIA can cause significant disability and loss of quality of life. Treatment of JIA is adjusted according to the severity of the disease as combinations of non-steroidal anti-inflammatory drugs (NSAIDs), synthetic and/ or biological disease modifying anti-rheumatic drugs (DMARDs). Although the disease etiology is unknown, disturbances in innate and adaptive immune responses have been implicated in JIA development. B cells may have important roles in JIA pathogenesis through autoantibody production, antigen presentation, cytokine release and/ or T cell activation. The study of B cells has not been extensively explored in JIA, but evidence from the literature suggests that B cells might have indeed a relevant role in JIA pathophysiology. The detection of autoantibodies such as antinuclear antibodies (ANA), RF and anti-citrullinated protein antibodies (ACPA) in JIA patients supports a breakdown in B cell tolerance. Furthermore, alterations in B cell subpopulations have been documented in peripheral blood and synovial fluid from JIA patients. In fact, altered B cell homeostasis, B cell differentiation and B cell hyperactivity have been described in JIA. Of note, B cell depletion therapy with rituximab has been shown to be an effective and well-tolerated treatment in children with JIA, which further supports B cell intervention in disease development.
Collapse
Affiliation(s)
- Rita A Moura
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - João Eurico Fonseca
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,Rheumatology Department, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte (CHULN), Lisbon Academic Medical Centre, Lisbon, Portugal
| |
Collapse
|
11
|
Abstract
ZusammenfassungIm Gebiet der Kinderrheumatologie gab es in den letzten Jahrzehnten immense
Fortschritte, die sowohl die Diagnostik, als auch die Therapie nachhaltig
verbessert haben. Obwohl erst seit 2003 in Deutschland offiziell als
Zusatzbezeichnung anerkannt, stehen heutzutage über 200 Kinder- und
Jugendrheumatologen (d. h. 1,4 Kinderrheumatologen pro 100 000
Kinder) für die Erkennung und Behandlung von rheumatischen Erkrankungen
bei Kindern und Jugendlichen bundesweit zur Verfügung. Neue Erkenntnisse
in der Pathogenese rheumatischer Erkrankungen und die sich stetig
weiterentwickelnde genetische Diagnostik haben das rheumatische
Krankheitsspektrum und die Behandlungsmöglichkeiten dramatisch erweitert
Internationale Forschungsnetzwerke und eine spezielle Gesetzgebung für
die Entwicklung von pädiatrischen Medikamenten führten zur
Zulassung von zahlreichen neuen Rheumamedikamenten, deren Sicherheit im
klinischen Alltag seit der Jahrtausendwende systematisch in Deutschland
untersucht wird. Maßnahmen zur Sicherung der Versorgungsqualität
wurden implementiert, Standardinstrumente zur Bewertung der
Krankheitsaktivität und Krankheitslast aus Patientensicht
eingeführt sowie Initiativen zur Verbesserung der Versorgung Betroffener
(z. B. die ProKind-Initiative) auf den Weg gebracht. Diese
Veränderungen haben die Prognose und Lebensperspektive rheumakranker
Kinder und Jugendlicher verbessert, wenngleich noch weiterer Optimierungsbedarf
besteht.
Collapse
Affiliation(s)
- Johannes-Peter Haas
- German Center for Rheumatology in Children and
Adolescents/Deutsches Zentrum für Kinder- und
Jugendrheumatologie Garmisch-Partenkirchen, Garmisch-Partenkirchen,
Deutschland
- Center for treatment of pain in young people/Zentrum
für Schmerztherapie junger Menschen, Deutschland
| | - Kirsten Minden
- Klinik für Pädiatrie mit Schwerpunkt Pulmonologie,
Immunologie und Intensivmedizin Charitè Centrum17,
Charité-Universitätsmedizin Berlin, Berlin,
Deutschland
- Deutsches Rheumaforschungszentrum, Leibniz-Gemeinschaft, Berlin,
Deutschland
| |
Collapse
|
12
|
Reiff DD, Stoll ML, Cron RQ. Precision medicine in juvenile idiopathic arthritis-has the time arrived? THE LANCET. RHEUMATOLOGY 2021; 3:e808-e817. [PMID: 38297525 DOI: 10.1016/s2665-9913(21)00252-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/07/2021] [Accepted: 07/28/2021] [Indexed: 12/14/2022]
Abstract
The introduction of disease-modifying anti-rheumatic drug therapies for treating children and adolescents with chronic arthritis (ie, juvenile idiopathic arthritis [JIA]) has revolutionised care and outcomes. The biologic revolution continues to expand, with ever-changing immunological targets coming to market after basic research and clinical trials. The first class of biologics that was beneficial for children with JIA was tumour necrosis factor (TNF) inhibitors. If used early and aggressively, TNF inhibitors are capable of inducing disease remission for most of the seven subtypes of JIA, with the exception of systemic JIA (which more frequently responds to interleukin [IL]-1 or IL-6 inhibition). Nevertheless, there are still subsets of patients with JIA with disease that is difficult to treat or who develop extra-articular features that require a different therapeutic approach. Although finding an effective biological therapy for individual children with JIA can be trial and error, ongoing research and clinical trials are providing insight into a more personalised approach to care. In addition, redefining the JIA classification, in part based on shared similarities with various adult arthritides, could allow for extrapolation of knowledge from studies in adults with chronic arthritis.
Collapse
Affiliation(s)
- Daniel D Reiff
- Department of Pediatrics, Division of Rheumatology, University of Alabama, Birmingham, AL, USA
| | - Matthew L Stoll
- Department of Pediatrics, Division of Rheumatology, University of Alabama, Birmingham, AL, USA
| | - Randy Q Cron
- Department of Pediatrics, Division of Rheumatology, University of Alabama, Birmingham, AL, USA.
| |
Collapse
|
13
|
Haas JP, Weimann V, Feist E. [Polyarticular juvenile idiopathic arthritis and rheumatoid arthritis : Common features and differences]. Z Rheumatol 2021; 81:4-13. [PMID: 34713333 DOI: 10.1007/s00393-021-01114-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2021] [Indexed: 10/20/2022]
Abstract
The spectrum of polyarthritic diseases in childhood as well as in adulthood is wide. In the differential diagnostics different age-related diseases must be taken into consideration. Although, a clear similarity is obvious in all age groups for the classical diseases of polyarticular juvenile idiopathic arthritis and rheumatoid arthritis with respect to the pathogenesis, clinical manifestation and treatment options, this review points to specific differences. The prognosis of polyarthritis in children mainly depends on the joint manifestation, whereas extra-articular comorbidities play a predominant role in the older adult population.
Collapse
Affiliation(s)
- Johannes-Peter Haas
- Deutsches Zentrum für Kinder- und Jugendrheumatologie, Zentrum für Schmerztherapie junger Menschen, Kinderklinik Garmisch-Partenkirchen gGmbH, Gehfeldstr. 24, 82467, Garmisch-Partenkirchen, Deutschland.
| | - Vincent Weimann
- Rheumatologie, Helios Fachklinik Vogelsang-Gommern, Vogelsang-Gommern, Deutschland
| | - Eugen Feist
- Rheumatologie, Helios Fachklinik Vogelsang-Gommern, Vogelsang-Gommern, Deutschland
| |
Collapse
|
14
|
Ll Wilkinson MG, Deakin CT, Papadopoulou C, Eleftheriou D, Wedderburn LR. JAK inhibitors: a potential treatment for JDM in the context of the role of interferon-driven pathology. Pediatr Rheumatol Online J 2021; 19:146. [PMID: 34563217 PMCID: PMC8466894 DOI: 10.1186/s12969-021-00637-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/28/2021] [Indexed: 12/29/2022] Open
Abstract
Juvenile Idiopathic Inflammatory Myopathies (IIM) are a group of rare diseases that are heterogeneous in terms of pathology that can include proximal muscle weakness, associated skin changes and systemic involvement. Despite options for treatment, many patients continue to suffer resistant disease and lasting side-effects. Advances in the understanding of the immunopathology and genetics underlying IIM may specify new therapeutic targets, particularly where conventional treatment has not achieved a clinical response. An upregulated type I interferon signature is strongly associated with disease and could be a prime target for developing more specific therapeutics. There are multiple components of the IFN pathway that could be targeted for blockade therapy.Downstream of the cytokine receptor complexes are the Janus kinase-signal transducers and activators of transcription (JAK-STAT) pathway, which consists of JAK1-3, TYK2, and STAT1-6. Therapeutic inhibitors have been developed to target components of this pathway. Promising results have been observed in case studies reporting the use of the JAK inhibitors, Baricitinib, Tofacitinib and Ruxolitinib in the treatment of refractory Juvenile Dermatomyositis (JDM). There is still the question of safety and efficacy for the use of JAK inhibitors in JDM that need to be addressed by clinical trials. Here we review the future for the use of JAK inhibitors as a treatment for JDM.
Collapse
Affiliation(s)
- Meredyth G Ll Wilkinson
- Infection, Immunity and Inflammation Programme Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK.
- Centre for Adolescent Rheumatology Versus Arthritis at UCL UCLH and GOSH, University College London, London, UK.
- NIHR Biomedical Research Centre at GOSH, London, UK.
| | - Claire T Deakin
- Infection, Immunity and Inflammation Programme Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL UCLH and GOSH, University College London, London, UK
- NIHR Biomedical Research Centre at GOSH, London, UK
| | - Charalampia Papadopoulou
- Infection, Immunity and Inflammation Programme Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK
- Rheumatology, Great Ormond Street Hospital, Great Ormond Street, London, UK
| | - Despina Eleftheriou
- Infection, Immunity and Inflammation Programme Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK
- Rheumatology, Great Ormond Street Hospital, Great Ormond Street, London, UK
| | - Lucy R Wedderburn
- Infection, Immunity and Inflammation Programme Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL UCLH and GOSH, University College London, London, UK
- NIHR Biomedical Research Centre at GOSH, London, UK
- Rheumatology, Great Ormond Street Hospital, Great Ormond Street, London, UK
| |
Collapse
|
15
|
Singh A, Behl T, Sehgal A, Singh S, Sharma N, Naved T, Bhatia S, Al-Harrasi A, Chakrabarti P, Aleya L, Vargas-De-La-Cruz C, Bungau S. Mechanistic insights into the role of B cells in rheumatoid arthritis. Int Immunopharmacol 2021; 99:108078. [PMID: 34426116 DOI: 10.1016/j.intimp.2021.108078] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 11/25/2022]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease epitomized by severe inflammation that induces tendon, cartilage, and bone damage over time. Although different types of cells undertake pathogenic functions in RA, the B cell's significant involvement has increasingly been known following the development of rheumatoid factor and it has been re-emphasized in recent years. Therefore, the rheumatoid factors and anti-cyclic citrullinated peptide antibodies are well-known indications of infection and clinical manifestations, and that they can precede the development of illness by several years. The emergence of rituximab a B cell reducing chimeric antidote in 1997 and 1998 transformed B-cell-targeted therapy for inflammatory disorder from a research hypothesis to a functional fact. Ever since, several autoantibody-related conditions were addressed, including the more intriguing indications of effectiveness seen in rheumatoid arthritis patients. Numerous types of B-cell-targeted compounds are currently being researched. From the beginning, one of the primary goals of B-cell therapy was to reinstate some kind of immune tolerance. While B cells have long been recognized as essential autoantibody producers, certain antibody-independent functions and usefulness as a key targeted therapy were not recognized until recently. The knowledge of B cells' diverse physical and pathogenic roles in autoimmune diseases is growing. As a result, the number of successful agents targeting the B cell complex is becoming more ubiquitous. Therefore, in this article, we explore fresh perspectives upon the roles of B cells in arthritis treatment, as well as new evidence regarding the effectiveness of B lymphocytes reduction and the therapeutic outcome of biological markers.
Collapse
Affiliation(s)
- Anuja Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab, India.
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Tanveer Naved
- Amity Institute of Pharmacy, Amity University, Noida, India
| | - Saurabh Bhatia
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman; School of Health Science, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
| | | | - Lotfi Aleya
- Chrono-Environment Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, France
| | - Celia Vargas-De-La-Cruz
- Faculty of Pharmacy and Biochemistry, Academic Department of Pharmacology, Bromatology and Toxicology, Centro Latinoamericano de Ensenanza e Investigacion en Bacteriologia Alimentaria, Universidad Nacinol Mayor de San Marcos, Lima, Peru; E-Health Research Center, Universidad de Ciencias y Humanidades, Lima, Peru
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
| |
Collapse
|
16
|
Becker ML, Kraft WK. Seeking Similarities Rather Than Differences With Adults to Aid in Therapeutic Advancement for Children. Clin Pharmacol Ther 2021; 110:11-14. [PMID: 34148235 DOI: 10.1002/cpt.2285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 05/11/2021] [Indexed: 01/03/2023]
Affiliation(s)
- Mara L Becker
- Department of Pediatrics, Division of Pediatric Rheumatology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Walter K Kraft
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| |
Collapse
|
17
|
Bader-Meunier B, Bustaffa M, Iskounen T, Carter E, Marsh JA, Baujat G, Crow YJ, Frémond ML. Rheumatoid factor positive polyarticular juvenile idiopathic arthritis associated with a novel COPA mutation. Rheumatology (Oxford) 2021; 60:e171-e173. [PMID: 33877315 DOI: 10.1093/rheumatology/keaa763] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 10/19/2020] [Indexed: 11/14/2022] Open
Affiliation(s)
- Brigitte Bader-Meunier
- Paediatric Haematology-Immunology and Rheumatology Department, AP-HP, Hôpital Necker-Enfants Malades.,Université de Paris, Imagine Institute, Laboratory of Immunogenetics of Paediatric Autoimmunity, INSERM UMR 1163
| | - Marta Bustaffa
- Paediatric Haematology-Immunology and Rheumatology Department, AP-HP, Hôpital Necker-Enfants Malades
| | - Thinhinane Iskounen
- Université de Paris, Imagine Institute, Laboratory of Neurogenetics and Neuroinflammation, F-75015 Paris, France
| | | | - Joseph A Marsh
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK and
| | - Geneviève Baujat
- Genetic Department, Hôpital Necker-Enfants Malades, and Reference Centre for Skeletal Dysplasia, AP-HP, F-75015 Paris, France
| | - Yanick J Crow
- Université de Paris, Imagine Institute, Laboratory of Neurogenetics and Neuroinflammation, F-75015 Paris, France.,Centre for Genomic and Experimental Medicine
| | - Marie-Louise Frémond
- Paediatric Haematology-Immunology and Rheumatology Department, AP-HP, Hôpital Necker-Enfants Malades.,Université de Paris, Imagine Institute, Laboratory of Neurogenetics and Neuroinflammation, F-75015 Paris, France
| |
Collapse
|
18
|
Biological classification of childhood arthritis: roadmap to a molecular nomenclature. Nat Rev Rheumatol 2021; 17:257-269. [PMID: 33731872 DOI: 10.1038/s41584-021-00590-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2021] [Indexed: 12/21/2022]
Abstract
Chronic inflammatory arthritis in childhood is heterogeneous in presentation and course. Most forms exhibit clinical and genetic similarity to arthritis of adult onset, although at least one phenotype might be restricted to children. Nevertheless, paediatric and adult rheumatologists have historically addressed disease classification separately, yielding a juvenile idiopathic arthritis (JIA) nomenclature that exhibits no terminological overlap with adult-onset arthritis. Accumulating clinical, genetic and mechanistic data reveal the critical limitations of this strategy, necessitating a new approach to defining biological categories within JIA. In this Review, we provide an overview of the current evidence for biological subgroups of arthritis in children, delineate forms that seem contiguous with adult-onset arthritis, and consider integrative genetic and bioinformatic strategies to identify discrete entities within inflammatory arthritis across all ages.
Collapse
|
19
|
López-Isac E, Smith SL, Marion MC, Wood A, Sudman M, Yarwood A, Shi C, Gaddi VP, Martin P, Prahalad S, Eyre S, Orozco G, Morris AP, Langefeld CD, Thompson SD, Thomson W, Bowes J. Combined genetic analysis of juvenile idiopathic arthritis clinical subtypes identifies novel risk loci, target genes and key regulatory mechanisms. Ann Rheum Dis 2021; 80:321-328. [PMID: 33106285 PMCID: PMC7892389 DOI: 10.1136/annrheumdis-2020-218481] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/28/2020] [Accepted: 09/16/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Juvenile idiopathic arthritis (JIA) is the most prevalent form of juvenile rheumatic disease. Our understanding of the genetic risk factors for this disease is limited due to low disease prevalence and extensive clinical heterogeneity. The objective of this research is to identify novel JIA susceptibility variants and link these variants to target genes, which is essential to facilitate the translation of genetic discoveries to clinical benefit. METHODS We performed a genome-wide association study (GWAS) in 3305 patients and 9196 healthy controls, and used a Bayesian model selection approach to systematically investigate specificity and sharing of associated loci across JIA clinical subtypes. Suggestive signals were followed-up for meta-analysis with a previous GWAS (2751 cases/15 886 controls). We tested for enrichment of association signals in a broad range of functional annotations, and integrated statistical fine-mapping and experimental data to identify target genes. RESULTS Our analysis provides evidence to support joint analysis of all JIA subtypes with the identification of five novel significant loci. Fine-mapping nominated causal single nucleotide polymorphisms with posterior inclusion probabilities ≥50% in five JIA loci. Enrichment analysis identified RELA and EBF1 as key transcription factors contributing to disease risk. Our integrative approach provided compelling evidence to prioritise target genes at six loci, highlighting mechanistic insights for the disease biology and IL6ST as a potential drug target. CONCLUSIONS In a large JIA GWAS, we identify five novel risk loci and describe potential function of JIA association signals that will be informative for future experimental works and therapeutic strategies.
Collapse
Affiliation(s)
- Elena López-Isac
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Samantha L Smith
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Miranda C Marion
- Center for Public Health Genomics and Department of Biostatistical Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Abigail Wood
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Marc Sudman
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center and University of Cincinnati, Cincinnati, Ohio, USA
| | - Annie Yarwood
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Chenfu Shi
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Vasanthi Priyadarshini Gaddi
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Paul Martin
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, Manchester, UK
| | - Sampath Prahalad
- Department of Pediatrics and Human Genetics, Emory University, and Children's Healthcare of Atlanta, Atlanta, Georgia, USA
| | - Stephen Eyre
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, Greater Manchester, UK
| | - Gisela Orozco
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, Greater Manchester, UK
| | - Andrew P Morris
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Carl D Langefeld
- Center for Public Health Genomics and Department of Biostatistical Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Susan D Thompson
- Division of Rheumatology, Cincinnati Children's Hospital Medical Center and University of Cincinnati, Cincinnati, Ohio, USA
| | - Wendy Thomson
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, Greater Manchester, UK
| | - John Bowes
- Centre for Genetics and Genomics Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, Greater Manchester, UK
| |
Collapse
|
20
|
Zou J, Thornton C, Chambers ES, Rosser EC, Ciurtin C. Exploring the Evidence for an Immunomodulatory Role of Vitamin D in Juvenile and Adult Rheumatic Disease. Front Immunol 2021; 11:616483. [PMID: 33679704 PMCID: PMC7930375 DOI: 10.3389/fimmu.2020.616483] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 12/22/2020] [Indexed: 12/14/2022] Open
Abstract
Vitamin D is synthesized in the skin following exposure to UVB radiation or is directly absorbed from the diet. Following hydroxylation in the liver and kidneys, vitamin D becomes its bioactive form, 1,25(OH)2D, which has been described to have potent immunomodulatory capacity. This review will focus on the effect of vitamin D in modulating the dysregulated immune system of autoimmune rheumatic diseases (ARD) patients across age, in particular in arthritis (rheumatoid arthritis and juvenile idiopathic arthritis), and systemic lupus erythematosus (with adult and juvenile onset). As well as delineating the impact of vitamin D on the innate and adaptive immune functions associated with each disease pathology, this review will also summarize and evaluate studies that link vitamin D status with disease prevalence, and supplementation studies that examine the potential benefits of vitamin D on disease outcomes. Exploring this evidence reveals that better designed randomized controlled studies are required to clarify the impact of vitamin D supplementation on ARD outcomes and general health. Considering the accessibility and affordability of vitamin D as a therapeutic option, there is a major unmet need for evidence-based treatment recommendations for the use of vitamin D in this patient population.
Collapse
Affiliation(s)
- Jiaqi Zou
- Centre for Rheumatology Research, Division of Medicine, University College London, London, United Kingdom
| | - Clare Thornton
- Department of Rheumatology (Metabolic Bone Diseases), University College London Hospital NHS Foundation Trust, London, United Kingdom
| | - Emma S Chambers
- Centre for Immunobiology, Blizard Institute, Queen Mary University of London, London, United Kingdom
| | - Elizabeth C Rosser
- Centre for Rheumatology Research, Division of Medicine, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology Versus Arthritis at University College London, University College London and Great Ormond Street Hospitals, London, United Kingdom
| | - Coziana Ciurtin
- Centre for Rheumatology Research, Division of Medicine, University College London, London, United Kingdom.,Centre for Adolescent Rheumatology Versus Arthritis at University College London, University College London and Great Ormond Street Hospitals, London, United Kingdom
| |
Collapse
|
21
|
Goettel AM, DeClercq J, Choi L, Graham TB, Mitchell AA. Efficacy and Safety of Abatacept, Adalimumab, and Etanercept in Pediatric Patients With Juvenile Idiopathic Arthritis. J Pediatr Pharmacol Ther 2021; 26:157-162. [PMID: 33603579 DOI: 10.5863/1551-6776-26.2.157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 06/10/2020] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The lack of randomized controlled trials comparing biologics for the treatment of juvenile idiopathic arthritis (JIA) has led to wide variation in treatment approaches. The objective of this study is to compare the efficacy and safety of abatacept, adalimumab, and etanercept in JIA patients treated at a tertiary pediatric institution. METHODS This was a single-center, retrospective chart review of patients initiated on abatacept, adalimumab, or etanercept from December 1, 2015, to August 31, 2018, at Monroe Carell Jr. Children's Hospital at Vanderbilt (VCH). The primary outcome was the change in the Physician Global Assessment (PGA) score after 4 to 6 months of biologic therapy. Secondary outcomes included change in laboratory markers of JIA disease activity, change in the number of joints with active disease or limitation of motion, reduction in corticosteroid dose, adverse effects, adherence among patients who have their medications filled at the institution's specialty pharmacy, and reason for discontinuation of therapy. RESULTS A total of 139 patients were included, with a median age of 13 years. Most patients, 80.6%, experienced a reduction in their PGA score after starting biologic therapy. There was not a statistically significant difference among the agents (p = 0.64). Adverse effects were reported in only 26.6% of patients, with the most frequent being injection site reactions or pain (n = 35). Ultimately, 32% of patients discontinued biologic therapy with a lack of efficacy being the most common reason. CONCLUSIONS Abatacept, adalimumab, and etanercept were not significantly different in efficacy and safety for the treatment of JIA at this single institution.
Collapse
|
22
|
Frémond ML, Crow YJ. STING-Mediated Lung Inflammation and Beyond. J Clin Immunol 2021; 41:501-514. [PMID: 33532887 DOI: 10.1007/s10875-021-00974-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 01/18/2021] [Indexed: 02/07/2023]
Abstract
Mendelian autoinflammatory diseases characterized by constitutive activation of the type I interferon pathway, the so-called type I interferonopathies, constitute a rapidly expanding group of inborn errors of immunity. Among the type I interferonopathies, STING-associated vasculopathy with onset in infancy (SAVI) and COPA syndrome were described in the last 6 years, both manifesting a major inflammatory lung component associated with significant morbidity and increased mortality. There is striking clinical and histopathological overlap between SAVI and COPA syndrome, although distinct features are also present. Of note, there is a remarkably high frequency of clinical non-penetrance among individuals harboring pathogenic COPA mutations. SAVI is caused by, principally heterozygous, gain-of-function mutations in STING1 (previously referred to as TMEM173) encoding STING, a key adaptor of the interferon signaling pathway induced by DNA. COPA syndrome results from heterozygous dominant-negative mutations in the coatomer protein subunit alpha, forming part of a complex involved in intracellular cargo protein transport between the Golgi and the endoplasmic reticulum (ER). Of importance, a role for COPA in regulating the trafficking of STING, an ER-resident protein which translocates to the Golgi during the process of its activation, was recently defined, thereby possibly explaining some aspects of the phenotypic overlap between SAVI and COPA syndrome. Here, we review the expanding phenotype of these diseases, highlighting common as well as specific features, and recent advances in our understanding of STING biology that have informed therapeutic decision-making in both conditions. Beyond these rare Mendelian disorders, DNA sensing through STING is likely relevant to the pathology of several diseases associated with lung inflammation, including systemic lupus erythematosus, dermatomyositis, environmental toxin exposure, and viral infection.
Collapse
Affiliation(s)
- Marie-Louise Frémond
- Université de Paris, Imagine Institute, Laboratory of Neurogenetics and Neuroinflammation, 24 boulevard du Montparnasse, F-75015, Paris, France. .,Paediatric Haematology-Immunology and Rheumatology Unit, AP-HP, Necker Hospital, F-75015, Paris, France.
| | - Yanick J Crow
- Université de Paris, Imagine Institute, Laboratory of Neurogenetics and Neuroinflammation, 24 boulevard du Montparnasse, F-75015, Paris, France.,Centre for Genomic and Experimental Medicine, Medical Research Council Institute of Genetics and Molecular Medicine, Edinburgh, UK
| |
Collapse
|
23
|
|
24
|
Overview of STING-Associated Vasculopathy with Onset in Infancy (SAVI) Among 21 Patients. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2020; 9:803-818.e11. [PMID: 33217613 DOI: 10.1016/j.jaip.2020.11.007] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/30/2020] [Accepted: 11/03/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Gain-of-function mutations in STING1 underlie a type I interferonopathy termed SAVI (STING-associated vasculopathy with onset in infancy). This severe disease is variably characterized by early-onset systemic inflammation, skin vasculopathy, and interstitial lung disease (ILD). OBJECTIVE To describe a cohort of patients with SAVI. METHODS Assessment of clinical, radiological and immunological data from 21 patients (17 families) was carried out. RESULTS Patients carried heterozygous substitutions in STING1 previously described in SAVI, mainly the p.V155M. Most were symptomatic from infancy, but late onset in adulthood occurred in 1 patient. Systemic inflammation, skin vasculopathy, and ILD were observed in 19, 18, and 21 patients, respectively. Extensive tissue loss occurred in 4 patients. Severity of ILD was highly variable with insidious progression up to end-stage respiratory failure reached at teenage in 6 patients. Lung imaging revealed early fibrotic lesions. Failure to thrive was almost constant, with severe growth failure seen in 4 patients. Seven patients presented polyarthritis, and the phenotype in 1 infant mimicked a combined immunodeficiency. Extended features reminiscent of other interferonopathies were also found, including intracranial calcification, glaucoma and glomerular nephropathy. Increased expression of interferon-stimulated genes and interferon α protein was constant. Autoantibodies were frequently found, in particular rheumatoid factor. Most patients presented with a T-cell defect, with low counts of memory CD8+ cells and impaired T-cell proliferation in response to antigens. Long-term follow-up described in 8 children confirmed the clinical benefit of ruxolitinib in SAVI where the treatment was started early in the disease course, underlying the need for early diagnosis. Tolerance was reasonably good. CONCLUSION The largest worldwide cohort of SAVI patients yet described, illustrates the core features of the disease and extends the clinical and immunological phenotype to include overlap with other monogenic interferonopathies.
Collapse
|
25
|
Guo Q, Liu Z, Wang M, Guo S, Cong H, Liu L. Analysis on the expression and value of CCL2 and CCL3 in patients with osteoarthritis. Exp Mol Pathol 2020; 118:104576. [PMID: 33197425 DOI: 10.1016/j.yexmp.2020.104576] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/05/2020] [Accepted: 11/11/2020] [Indexed: 11/19/2022]
Abstract
In this study, we investigated the clinical value of CC chemokine ligand 2 (CCL2) and CC chemokine ligand 3 (CCL3) in osteoarthritis (OA). A prospective analysis was performed on 126 patients with rheumatoid arthritis of the knee (observation group (OG)) who admitted to Qilu hospital from August 2016 to August 2018 and 135 healthy controls (control group (CG)) who underwent physical examinations during the same period. The concentrations of CCL2 and CCL3 in peripheral blood were compared between the two groups, and the predictive value of the two on the occurrence, efficacy and prognosis of recurrence of OA were analyzed. In addition, an OA rat model was established to detect the relative protein levels of CCL2 and CCL3 in rat knee joint tissues. There were no statistically significant differences between the two groups in baseline data such as age, body mass index (BMI), gender, smoking, drinking, educational level, family medical history and living environment (P > 0.05). CCL2 and CCL3 increased in peripheral blood of patients in the OG (P < 0.05), both of which were positively correlated with rheumatoid factor (RF) (P < 0.001). CCL2 and CCL3 were of good predictive value for the occurrence, efficacy and prognosis of recurrence of OA (P < 0.001). The relative protein levels of CCL2 and CCL3 in bone and joint tissues of OA rats were significantly higher than those of normal rats (P < 0.001). CCL2 and CCL3 are elevated in peripheral blood of OA patients, which have good predictive value for the occurrence, efficacy and prognosis of recurrence of OA, indicating their potential roles as excellent markers for diagnosis and treatment of OA in the future.
Collapse
Affiliation(s)
- Qi Guo
- Department of Orthopaedics, Wei Hai Central Hospital, Wei Hai 264400, PR China
| | - Zengliang Liu
- Department of Orthopaedics, Wei Hai Central Hospital, Wei Hai 264400, PR China
| | - Moxue Wang
- Department of Orthopaedics, Wei Hai Central Hospital, Wei Hai 264400, PR China
| | - Shanqiang Guo
- Department of Orthopaedics, Wei Hai Central Hospital, Wei Hai 264400, PR China
| | - Haibo Cong
- Department of Orthopaedics, Wei Hai Central Hospital, Wei Hai 264400, PR China
| | - Lei Liu
- Department of Orthopaedics, Qilu Hospital Huantai Branch, ZiBo 256400, PR China.
| |
Collapse
|
26
|
The Multi-Omics Architecture of Juvenile Idiopathic Arthritis. Cells 2020; 9:cells9102301. [PMID: 33076506 PMCID: PMC7602566 DOI: 10.3390/cells9102301] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/30/2020] [Accepted: 10/09/2020] [Indexed: 12/12/2022] Open
Abstract
Juvenile idiopathic arthritis (JIA) is highly heterogeneous in terms of etiology and clinical presentation with ambiguity in JIA classification. The advance of high-throughput omics technologies in recent years has gained us significant knowledge about the molecular mechanisms of JIA. Besides a minor proportion of JIA cases as monogenic, most JIA cases are polygenic disease caused by autoimmune mechanisms. A number of HLA alleles (including both HLA class I and class II genes), and 23 non-HLA genetic loci have been identified of association with different JIA subtypes. Omics technologies, i.e., transcriptome profiling and epigenomic analysis, contributed significant knowledge on the molecular mechanisms of JIA in addition to the genetic approach. New molecular knowledge on different JIA subtypes enables us to reconsider the JIA classification, but also highlights novel therapeutic targets to develop a cure for the devastating JIA.
Collapse
|
27
|
Abstract
Joint pain is a common symptom in children and adolescents. While there are many causes of joint pain in children, most of these are acute or not related to underlying joint inflammation. Chronic arthritis, however, can be one of the reasons behind the joint pain. The most common causes of chronic arthritis in children are categorized under juvenile idiopathic arthritis (JIA). The purpose of this review is to highlight the most important clinical features, work-up, and medical management of the different subtypes of JIA.
Collapse
|
28
|
Frémond ML, Nathan N. COPA syndrome, 5 years after: Where are we? Joint Bone Spine 2020; 88:105070. [PMID: 32919065 DOI: 10.1016/j.jbspin.2020.09.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 09/02/2020] [Indexed: 01/01/2023]
Abstract
Heterozygous missense mutations in COPA, encoding coatomer protein subunit alpha (COPA), cause an interferonopathy mainly associating lung, joint and kidney involvement. This rare autoinflammatory disease is characterised by variable expression and a remarkably high frequency of clinical non-penetrance. Lung features, predominantly chronic diffuse alveolar haemorrhage (DAH), are observed in almost patients and can result in end-stage respiratory insufficiency. The initially described phenotype was broadened to include isolated DAH or lupus nephritis. Rare manifestations reminiscent of other monogenic interferonopathies occur. This indicates the need for careful clinical evaluation in patients with suspicion or diagnosis of COPA syndrome. Considering the dominant inheritance model and the highly variable phenotype, ranging from severe multi-organic disorder to non-penetrance, a careful family screening is recommended. New insights in disease pathogenesis have linked COPA mutations to STING-mediated interferon signalling. Beside a variable efficacy of 'classical' immunosuppressive drugs, Janus kinase (JAK) inhibitors constitute a promising treatment in COPA syndrome, and further targeted therapies are awaited.
Collapse
Affiliation(s)
- Marie-Louise Frémond
- Laboratory of Neurogenetics and Neuroinflammation, Imagine Institute, 24, boulevard du Montparnasse, 75015 Paris, France.
| | - Nadia Nathan
- Pediatric Pulmonology Department and Reference center for rare lung disease RespiRare, Trousseau University Hospital, AP-HP, Sorbonne Université, Paris, France; Sorbonne Université, Inserm/UMRS_933, Trousseau University Hospital, Paris, France
| |
Collapse
|
29
|
Huang N, Fan Z, Ma L, Ma H, Huang H, Yu H, Zhou X. Long non‑coding RNA RP11‑340F14.6 promotes a shift in the Th17/Treg ratio by binding with P2X7R in juvenile idiopathic arthritis. Int J Mol Med 2020; 46:859-868. [PMID: 32467993 DOI: 10.3892/ijmm.2020.4618] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/08/2020] [Indexed: 11/06/2022] Open
Affiliation(s)
- Na Huang
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Zhidan Fan
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Le Ma
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Huihui Ma
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Hui Huang
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Haiguo Yu
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Xiaoyu Zhou
- Department of Neonatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| |
Collapse
|
30
|
Implications of juvenile idiopathic arthritis genetic risk variants for disease pathogenesis and classification. Curr Opin Rheumatol 2020; 31:401-410. [PMID: 31169548 DOI: 10.1097/bor.0000000000000637] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE OF REVIEW We assess the implications of recent advances in the genetics of juvenile idiopathic arthritis (JIA) for the evolving understanding of inflammatory arthritis in children. RECENT FINDINGS JIA exhibits prominent genetic associations with the human leukocyte antigen (HLA) region, extending perhaps surprisingly even to the hyperinflammatory systemic JIA category. Some HLA associations resemble those for adult-onset inflammatory arthritides, providing evidence for pathogenic continuity across the age spectrum. Genome-wide association studies have defined an increasing number of JIA-linked non-HLA loci, many again shared with adult-onset arthritis. As most risk loci contain only noncoding variants, new experimental methods such as SNP-seq and innovative big-data strategies help identify responsible causative mutations, termed functional SNPs (fSNPs). Alternately, gene hunting in multiplex families implicates new genes in monogenic childhood arthritis, including MYD88 and the intriguing innate immune gene LACC1. SUMMARY Genetic data indicate a continuity between JIA and adult arthritis poorly reflected in current nomenclature. Advancing methodologies will help to identify new pathogenic mechanisms that inform the understanding of biologic subdivisions within JIA. Resulting insights will facilitate the application of lessons learned across the age spectrum to the treatment of arthritis in children and adults.
Collapse
|
31
|
Wysocki T, Olesińska M, Paradowska-Gorycka A. Current Understanding of an Emerging Role of HLA-DRB1 Gene in Rheumatoid Arthritis-From Research to Clinical Practice. Cells 2020; 9:cells9051127. [PMID: 32370106 PMCID: PMC7291248 DOI: 10.3390/cells9051127] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/28/2020] [Accepted: 04/30/2020] [Indexed: 12/22/2022] Open
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease with an unclear pathogenic mechanism. However, it has been proven that the key underlying risk factor is a genetic predisposition. Association studies of the HLA-DRB1 gene clearly indicate its importance in RA morbidity. This review presents the current state of knowledge on the impact of HLA-DRB1 gene, functioning both as a component of the patient’s genome and as an environmental risk factor. The impact of known HLA-DRB1 risk variants on the specific structure of the polymorphic HLA-DR molecule, and epitope binding affinity, is presented. The issues of the potential influence of HLA-DRB1 on the occurrence of non-articular disease manifestations and response to treatment are also discussed. A deeper understanding of the role of the HLA-DRB1 gene is essential to explore the complex nature of RA, which is a result of multiple contributing factors, including genetic, epigenetic and environmental factors. It also creates new opportunities to develop modern and personalized forms of therapy.
Collapse
Affiliation(s)
- Tomasz Wysocki
- Department of Systemic Connective Tissue Diseases, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland; or
- Correspondence:
| | - Marzena Olesińska
- Department of Systemic Connective Tissue Diseases, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland; or
| | - Agnieszka Paradowska-Gorycka
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland; or
| |
Collapse
|
32
|
Stoll ML, Mellins ED. Psoriatic arthritis in childhood: A commentary on the controversy. Clin Immunol 2020; 214:108396. [PMID: 32229291 DOI: 10.1016/j.clim.2020.108396] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 12/28/2022]
Abstract
Approximately 5% of children with juvenile idiopathic arthritis (JIA) are diagnosed with the psoriatic form of the disease. In recent years, there has been substantial scholarship demonstrating both heterogeneity within the disease as well as similarities with other forms of JIA, culminating in a recent proposal for the categorization of JIA that excluded the psoriatic form altogether. The purpose of the review is to summarize the clinical, epidemiologic, and genetic features of psoriatic JIA (PsJIA), comparing it with other categories of JIA including spondyloarthritis. We conclude that there are sufficient unique clinical and genetic features within PsJIA as well as similarities with its adult counterpart that warrant including it within the JIA paradigm.
Collapse
Affiliation(s)
- Matthew L Stoll
- Department of Pediatrics, University of Alabama at Birmingham, 1600 7(th) Avenue South, Children's Park Place North Suite G10, Birmingham, AL 35233, USA.
| | - Elizabeth D Mellins
- Department of Pediatrics, Program in Immunology, Stanford University, 269 Campus Drive, CCSR Rm 2105c, Stanford, CA 94305-5164, USA.
| |
Collapse
|
33
|
Busch R, Kollnberger S, Mellins ED. HLA associations in inflammatory arthritis: emerging mechanisms and clinical implications. Nat Rev Rheumatol 2020; 15:364-381. [PMID: 31092910 DOI: 10.1038/s41584-019-0219-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Our understanding of the mechanisms underlying HLA associations with inflammatory arthritis continues to evolve. Disease associations have been refined, and interactions of HLA genotype with other genes and environmental risk factors in determining disease risk have been identified. This Review provides basic information on the genetics and molecular function of HLA molecules, as well as general features of HLA associations with disease. Evidence is discussed regarding the various peptide-dependent and peptide-independent mechanisms by which HLA alleles might contribute to the pathogenesis of three types of inflammatory arthritis: rheumatoid arthritis, spondyloarthritis and systemic juvenile idiopathic arthritis. Also discussed are HLA allelic associations that shed light on the genetic heterogeneity of inflammatory arthritides and on the relationships between adult and paediatric forms of arthritis. Clinical implications range from improved diagnosis and outcome prediction to the possibility of using HLA associations in developing personalized strategies for the treatment and prevention of these diseases.
Collapse
Affiliation(s)
- Robert Busch
- Department of Life Sciences, University of Roehampton, Whitelands College, London, UK.
| | - Simon Kollnberger
- School of Medicine, Cardiff University, UHW Main Building, Heath Park, Cardiff, UK
| | - Elizabeth D Mellins
- Department of Pediatrics, Program in Immunology, Stanford University Medical Center, Stanford, CA, USA.
| |
Collapse
|
34
|
Fan ZD, Cao Q, Huang N, Ma L, Ma HH, Zhang YY, Yu HG, Zhou GP. MicroRNA-125b regulates Th17/Treg cell differentiation and is associated with juvenile idiopathic arthritis. World J Pediatr 2020; 16:99-110. [PMID: 31102153 DOI: 10.1007/s12519-019-00265-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 05/02/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Juvenile idiopathic arthritis (JIA) is the most common rheumatic disease in childhood driven by aberrant pathways of T-cell activation. T helper 17 (Th17)/regulatory T cell (Treg) imbalance plays critical roles in the pathogenesis of arthritis. MicroRNA-125b (miR-125b) was upregulated after the activation of the initial CD4+ T cells, and could regulate the differentiation of CD4+ T cells. However, the effects of miR-125b on Th17/Treg imbalance and differentiation of Th17/Treg cells remain unknown. METHODS In this study, we evaluated the expression of miR-125b in the peripheral blood mononuclear cells (PBMCs) of children with JIA, and the relationship of miR-125b with Th17/Treg imbalance. Then, we used lentivirus vector-mediated overexpression technology to investigate the regulatory function of miR-125b in CD4+ T cells or dendritic cell/CD4+ T co-culture system. RESULTS Decreased miR-125b expression in PBMCs and CD4+ T cells of JIA patients was negatively correlated with the ratio of Th17/Treg cells. It also correlated negatively with retinoic acid receptor-related orphan receptor γt but positively with Forkhead box protein 3 at transcriptional levels. Furthermore, we found that miR-125b overexpression inhibited Th17 cell differentiation, whereas facilitated the differentiation of Treg cells. MiR-125b upregulation led to the decrease of Th17-secreting cytokines but the increase of the Treg-secreting cytokines. CONCLUSIONS Our results demonstrate that miR-125b participated in regulating Th17/Treg cell differentiation and imbalance in JIA patients. These findings provide novel insight into the critical role of miR-125b in the Th17/Treg imbalance of JIA, and raise the distinct possibility that miR-125b may prove to be a potential therapeutic target for JIA.
Collapse
Affiliation(s)
- Zhi-Dan Fan
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.,Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Qian Cao
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Na Huang
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Le Ma
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Hui-Hui Ma
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Ya-Yuan Zhang
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Hai-Guo Yu
- Department of Rheumatology and Immunology, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - Guo-Ping Zhou
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| |
Collapse
|
35
|
Jia J, Li J, Yao X, Zhang Y, Yang X, Wang P, Xia Q, Hakonarson H, Li J. Genetic architecture study of rheumatoid arthritis and juvenile idiopathic arthritis. PeerJ 2020; 8:e8234. [PMID: 31988799 PMCID: PMC6969553 DOI: 10.7717/peerj.8234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 11/18/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Rheumatoid arthritis and juvenile idiopathic arthritis are two types of autoimmune diseases with inflammation at the joints, occurring to adults and children respectively. There are phenotypic overlaps between these two types of diseases, despite the age difference in patient groups. METHODS To systematically compare the genetic architecture of them, we conducted analyses at gene and pathway levels and constructed protein-protein-interaction network based on summary statistics of genome-wide association studies of these two diseases. We examined their difference and similarity at each level. RESULTS We observed extensive overlap in significant SNPs and genes at the human leukocyte antigen region. In addition, several SNPs in other regions of the human genome were also significantly associated with both diseases. We found significantly associated genes enriched in 32 pathways shared by both diseases. Excluding genes in the human leukocyte antigen region, significant enrichment is present for pathways like interleukin-27 pathway and NO2-dependent interleukin-12 pathway in natural killer cells. DISCUSSION The identification of commonly associated genes and pathways may help in finding population at risk for both diseases, as well as shed light on repositioning and designing drugs for both diseases.
Collapse
Affiliation(s)
- Jun Jia
- Department of Surgery of Foot and Ankle, Tianjin Hospital, Tianjin, China
| | - Junyi Li
- Department of Cell Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin, China
| | - Xueming Yao
- Department of Cell Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin, China
| | - YuHang Zhang
- Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xiaohao Yang
- Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Ping Wang
- Department of Cell Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin, China
| | - Qianghua Xia
- Department of Cell Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin, China
| | - Hakon Hakonarson
- Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
- Division of Human Genetics, Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| | - Jin Li
- Department of Cell Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin, China
| |
Collapse
|
36
|
Beukelman T, Nigrovic PA. Juvenile Idiopathic Arthritis: An Idea Whose Time Has Gone? J Rheumatol 2019; 46:124-126. [PMID: 30710000 DOI: 10.3899/jrheum.180922] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Timothy Beukelman
- Division of Rheumatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama;
| | - Peter A Nigrovic
- Brigham and Women's Hospital, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
37
|
Lambert NC. Nonendocrine mechanisms of sex bias in rheumatic diseases. Nat Rev Rheumatol 2019; 15:673-686. [PMID: 31597952 DOI: 10.1038/s41584-019-0307-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2019] [Indexed: 12/22/2022]
Abstract
Rheumatic diseases affect a wide range of individuals of all ages, but the most common diseases occur more frequently in women than in men, at ratios of up to ten women to one man. Despite a growing number of studies on sex bias in rheumatic diseases, sex-specific health care is limited and sex specificity is not systematically integrated into treatment regimens. Women and men differ in three major biological points: the number of X chromosomes per cell, the type and quantities of sex hormones present and the ability to be pregnant, all of which have immunological consequences. Could a greater understanding of these differences lead to a new era of personalized sex-specific medicine? This Review focuses on the main genetic and epigenetic mechanisms that have been put forward to explain sex bias in rheumatic diseases, including X chromosome inactivation, sex chromosome aneuploidy and microchimerism. The influence of sex hormones is not discussed in detail in this Review, as it has been well described elsewhere. Understanding the sex-specific factors that contribute to the initiation and progression of rheumatic diseases will enable progress to be made in the diagnosis, treatment and management of all patients with these conditions.
Collapse
Affiliation(s)
- Nathalie C Lambert
- INSERM UMRs 1097 Arthrites Autoimmunes, Aix Marseille Université, Marseille, France.
| |
Collapse
|
38
|
Abstract
Juvenile idiopathic arthritis (JIA) is a chronic childhood arthritis. Its pathogenesis is very complicated, with the involvement of not only immune cells but various types of parenchymal cells, and is affected by both genetic and environmental predispositions. The clinical spectrum from inflammation to related conditions is largely mediated by cytokines including interleukin (IL)-6. Fluctuations in IL-6 and its related molecules can modulate the pathogenesis and the clinical presentation positively or negatively. The recent clinical impact of IL-6 blockade on JIA has begun a therapeutic paradigm shift. This review describes the characteristics of JIA, mainly focused on IL-6 with the current therapeutic perspective.
Collapse
Affiliation(s)
- Shinji Akioka
- a Department of Pediatrics , Kyoto Prefectural University of Medicine , Kyoto , Japan
| |
Collapse
|
39
|
Wilkinson MGL, Rosser EC. B Cells as a Therapeutic Target in Paediatric Rheumatic Disease. Front Immunol 2019; 10:214. [PMID: 30837988 PMCID: PMC6382733 DOI: 10.3389/fimmu.2019.00214] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 01/24/2019] [Indexed: 12/12/2022] Open
Abstract
B cells carry out a central role in the pathogenesis of autoimmune disease. In addition to the production of autoantibodies, B cells can contribute to disease development by presenting autoantigens to autoreactive T cells and by secreting pro-inflammatory cytokines and chemokines which leads to the amplification of the inflammatory response. Targeting both the antibody-dependent and antibody-independent function of B cells in adult rheumatic disease has led to the advent of B cell targeted therapies in clinical practice. To date, whether B cell depletion could also be utilized for the treatment of pediatric disease is relatively under explored. In this review, we will discuss the role of B cells in the pathogenesis of the pediatric rheumatic diseases Juvenile Idiopathic Arthritis (JIA), Juvenile Systemic Lupus Erythematosus (JSLE) and Juvenile Dermatomyositis (JDM). We will also explore the rationale behind the use of B cell-targeted therapies in pediatric rheumatic disease by highlighting new case studies that points to their efficacy in JIA, JSLE, and JDM.
Collapse
Affiliation(s)
- Meredyth G Ll Wilkinson
- Infection, Immunity, Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Arthritis Research UK Centre for Adolescent Rheumatology, University College London, UCLH and GOSH, London, United Kingdom.,NIHR Biomedical Research Centre, Great Ormond Street Hospital, London, United Kingdom
| | - Elizabeth C Rosser
- Infection, Immunity, Inflammation Programme, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Arthritis Research UK Centre for Adolescent Rheumatology, University College London, UCLH and GOSH, London, United Kingdom.,NIHR Biomedical Research Centre, Great Ormond Street Hospital, London, United Kingdom
| |
Collapse
|
40
|
Mahmud SA, Binstadt BA. Autoantibodies in the Pathogenesis, Diagnosis, and Prognosis of Juvenile Idiopathic Arthritis. Front Immunol 2019; 9:3168. [PMID: 30693002 PMCID: PMC6339949 DOI: 10.3389/fimmu.2018.03168] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 12/24/2018] [Indexed: 12/26/2022] Open
Abstract
Autoantibody production occurs in juvenile idiopathic arthritis (JIA) and numerous other autoimmune diseases. In some conditions, the autoantibodies are clearly pathogenic, whereas in others the roles are less defined. Here we review various autoantibodies associated with JIA, with a particular focus on antinuclear antibodies and antibodies recognizing citrullinated self-antigens. We explore potential mechanisms that lead to the development of autoantibodies and the use of autoantibody testing in diagnosis and prognosis. Finally, we compare and contrast JIA-associated autoantibodies with those found in adults with rheumatoid arthritis (RA).
Collapse
Affiliation(s)
- Shawn A Mahmud
- Division of Pediatric Rheumatology, Department of Pediatrics, and the Center for Immunology, University of Minnesota, Minneapolis, MN, United States
| | - Bryce A Binstadt
- Division of Pediatric Rheumatology, Department of Pediatrics, and the Center for Immunology, University of Minnesota, Minneapolis, MN, United States
| |
Collapse
|
41
|
Saad MN, Mabrouk MS, Eldeib AM, Shaker OG. Comparative study for haplotype block partitioning methods - Evidence from chromosome 6 of the North American Rheumatoid Arthritis Consortium (NARAC) dataset. PLoS One 2019; 13:e0209603. [PMID: 30596705 PMCID: PMC6312333 DOI: 10.1371/journal.pone.0209603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 12/07/2018] [Indexed: 11/19/2022] Open
Abstract
Haplotype-based methods compete with “one-SNP-at-a-time” approaches on being preferred for association studies. Chromosome 6 contains most of the known genetic biomarkers for rheumatoid arthritis (RA) disease. Therefore, chromosome 6 serves as a benchmark for the haplotype methods testing. The aim of this study is to test the North American Rheumatoid Arthritis Consortium (NARAC) dataset to find out if haplotype block methods or single-locus approaches alone can sufficiently provide the significant single nucleotide polymorphisms (SNPs) associated with RA. In addition, could we be satisfied with only one method of the haplotype block methods for partitioning chromosome 6 of the NARAC dataset? In the NARAC dataset, chromosome 6 comprises 35,574 SNPs for 2,062 individuals (868 cases, 1,194 controls). Individual SNP approach and three haplotype block methods were applied to the NARAC dataset to identify the RA biomarkers. We employed three haplotype partitioning methods which are confidence interval test (CIT), four gamete test (FGT), and solid spine of linkage disequilibrium (SSLD). P-values after stringent Bonferroni correction for multiple testing were measured to assess the strength of association between the genetic variants and RA susceptibility. Moreover, the block size (in base pairs (bp) and number of SNPs included), number of blocks, percentage of uncovered SNPs by the block method, percentage of significant blocks from the total number of blocks, number of significant haplotypes and SNPs were used to compare among the three haplotype block methods. Individual SNP, CIT, FGT, and SSLD methods detected 432, 1,086, 1,099, and 1,322 associated SNPs, respectively. Each method identified significant SNPs that were not detected by any other method (Individual SNP: 12, FGT: 37, CIT: 55, and SSLD: 189 SNPs). 916 SNPs were discovered by all the three haplotype block methods. 367 SNPs were discovered by the haplotype block methods and the individual SNP approach. The P-values of these 367 SNPs were lower than those of the SNPs uniquely detected by only one method. The 367 SNPs detected by all the methods represent promising candidates for RA susceptibility. They should be further investigated for the European population. A hybrid technique including the four methods should be applied to detect the significant SNPs associated with RA for chromosome 6 of the NARAC dataset. Moreover, SSLD method may be preferred for its favored benefits in case of selecting only one method.
Collapse
Affiliation(s)
- Mohamed N. Saad
- Biomedical Engineering Department, Faculty of Engineering, Minia University, Minia, Egypt
- * E-mail: ,
| | - Mai S. Mabrouk
- Biomedical Engineering Department, Faculty of Engineering, Misr University for Science and Technology (MUST), 6th of October City, Egypt
| | - Ayman M. Eldeib
- Systems and Biomedical Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt
| | - Olfat G. Shaker
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| |
Collapse
|
42
|
Kessler H, Jiang K, Jarvis JN. Using Chromatin Architecture to Understand the Genetics and Transcriptomics of Juvenile Idiopathic Arthritis. Front Immunol 2018; 9:2964. [PMID: 30619322 PMCID: PMC6302745 DOI: 10.3389/fimmu.2018.02964] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/03/2018] [Indexed: 12/20/2022] Open
Abstract
The presence of abnormal gene expression signatures is a well-described feature of the oligoarticular and polyarticular forms of juvenile idiopathic arthritis. In this review, we discuss how new insights into genetic risk for JIA and the three dimensional architecture of the genome may be used to develop a better understanding of the mechanisms driving these gene expression patterns.
Collapse
Affiliation(s)
- Haeja Kessler
- Department of Pediatrics, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, United States
| | - Kaiyu Jiang
- Department of Pediatrics, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, United States
| | - James N Jarvis
- Department of Pediatrics, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, United States.,Genetics, Genomics, and Bioinformatics Program, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, United States
| |
Collapse
|
43
|
|