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Behera AK, Sharma P, Tg R, Kumar V, Pati SK, Sinha K. Real-World Clinical Profile and Safety of Nintedanib in Systemic Sclerosis-Associated Interstitial Lung Disease: A Subgroup Analysis of Interstitial Lung Disease Data From an Interstitial Lung Disease (ILD) Specialty Clinic in India. Cureus 2024; 16:e65579. [PMID: 39192903 PMCID: PMC11348947 DOI: 10.7759/cureus.65579] [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: 07/26/2024] [Indexed: 08/29/2024] Open
Abstract
INTRODUCTION Systemic sclerosis (SSc) is a multisystem autoimmune disorder characterized by dysregulated innate and adaptive immunity. Interstitial lung disease (ILD) is a common and serious complication of SSc, often leading to significant morbidity and mortality. Consistent demographic characteristics that aid in the early diagnosis of ILD in SSc are lacking. This study aims to identify clinical and demographic parameters associated with ILD in SSc patients and assess the safety and tolerability of nintedanib with other immunosuppressants. MATERIALS AND METHODS This study is a subgroup analysis of data from the ILD clinic at All India Institute of Medical Sciences Raipur, collected between January 2022 and January 2024. We assessed the clinical and demographic profiles, high-resolution computed tomography thorax patterns, autoantibody profiles, lung function, and treatments used in the patients. RESULTS We enrolled 57 patients with SSc-associated ILD. The mean age of the participants was 39.0 ± 11.1 years, with 53 (92.9%) being women. The mean body mass index was 20.4 ± 4.32 kg/m². Dyspnea was the most common symptom, followed by skin tightening and cough. Antinuclear antibody tests were positive in 92.9% of patients, and anti-Scl-70 antibodies were positive in 57.9%. Rheumatoid arthritis-SSc overlap was observed in 15.8% of patients. The mean predicted forced vital capacity was 46.5 ± 19.9%, the mean predicted total lung capacity was 64.5 ± 20.4%, and the mean predicted diffusing capacity for carbon monoxide was 46.2 ± 15.7%. The mean six-minute walk distance was 360.3 ± 81.2 meters, and the mean King's Brief Interstitial Lung Disease score was 63.9 ± 10.7. Common radiological abnormalities included ground-glass opacities in 57.8%, traction bronchiectasis in 43.8%, and honeycombing in 28.07%. The predominant ILD pattern was nonspecific interstitial pneumonia. Patients received a combination of prednisolone (5 mg/day) with mycophenolate mofetil (63.2%), hydroxychloroquine (17.5%), cyclophosphamide (12.3%), and methotrexate (7.02%). Nintedanib, the only antifibrotic used, was administered to 17 (29.8%) patients. CONCLUSIONS ILD is relatively common in SSc, particularly in patients with diffuse cutaneous SSc and those with anti-topoisomerase antibodies. Female patients comprised the predominant population in this study. Patients tolerated mycophenolate mofetil and cyclophosphamide well. Nintedanib was the only antifibrotic used, and all patients tolerated the combination of antifibrotics and immunosuppressants well. Early diagnosis is crucial to slow disease progression and preserve lung function. Our results highlight the need for vigilant screening in high-risk groups and suggest that MMF, cyclophosphamide, and nintedanib can be safely incorporated into treatment regimens, offering a potential strategy to improve patient outcomes.
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Affiliation(s)
- Ajoy K Behera
- Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, Raipur, IND
| | - Pratibha Sharma
- Microbiology, Shri Balaji Institute of Medical Science, Raipur, IND
| | - Ranganath Tg
- Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, Raipur, IND
| | - Vikas Kumar
- Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, Raipur, IND
| | - Saroj K Pati
- Radiodiagnosis, All India Institute of Medical Sciences, Raipur, Raipur, IND
| | - Kulshreshth Sinha
- Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, Raipur, IND
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Muruganandam M, Ariza-Hutchinson A, Patel RA, Sibbitt WL. Biomarkers in the Pathogenesis, Diagnosis, and Treatment of Systemic Sclerosis. J Inflamm Res 2023; 16:4633-4660. [PMID: 37868834 PMCID: PMC10590076 DOI: 10.2147/jir.s379815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 09/27/2023] [Indexed: 10/24/2023] Open
Abstract
Systemic sclerosis (SSc) is a complex autoimmune disease characterized by vascular damage, vasoinstability, and decreased perfusion with ischemia, inflammation, and exuberant fibrosis of the skin and internal organs. Biomarkers are analytic indicators of the biological and disease processes within an individual that can be accurately and reproducibly measured. The field of biomarkers in SSc is complex as recent studies have implicated at least 240 pathways and dysregulated proteins in SSc pathogenesis. Anti-nuclear antibodies (ANA) are classical biomarkers with well-described clinical classifications and are present in more than 90% of SSc patients and include anti-centromere, anti-Th/To, anti-RNA polymerase III, and anti-topoisomerase I antibodies. Transforming growth factor-β (TGF-β) is central to the fibrotic process of SSc and is intimately intertwined with other biomarkers. Tyrosine kinases, interferon-1 signaling, IL-6 signaling, endogenous thrombin, peroxisome proliferator-activated receptors (PPARs), lysophosphatidic acid receptors, and amino acid metabolites are new biomarkers with the potential for developing new therapeutic agents. Other biomarkers implicated in SSc-ILD include signal transducer and activator of transcription 4 (STAT4), CD226 (DNAX accessory molecule 1), interferon regulatory factor 5 (IRF5), interleukin-1 receptor-associated kinase-1 (IRAK1), connective tissue growth factor (CTGF), pyrin domain containing 1 (NLRP1), T-cell surface glycoprotein zeta chain (CD3ζ) or CD247, the NLR family, SP-D (surfactant protein), KL-6, leucine-rich α2-glycoprotein-1 (LRG1), CCL19, genetic factors including DRB1 alleles, the interleukins (IL-1, IL-4, IL-6, IL-8, IL-10 IL-13, IL-16, IL-17, IL-18, IL-22, IL-32, and IL-35), the chemokines CCL (2,3,5,13,20,21,23), CXC (8,9,10,11,16), CX3CL1 (fractalkine), and GDF15. Adiponectin (an indicator of PPAR activation) and maresin 1 are reduced in SSc patients. A new trend has been the use of biomarker panels with combined complex multifactor analysis, machine learning, and artificial intelligence to determine disease activity and response to therapy. The present review is an update of the various biomarker molecules, pathways, and receptors involved in the pathology of SSc.
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Affiliation(s)
- Maheswari Muruganandam
- Department of Internal Medicine, Division of Rheumatology and School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Angie Ariza-Hutchinson
- Department of Internal Medicine, Division of Rheumatology and School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Rosemina A Patel
- Department of Internal Medicine, Division of Rheumatology and School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Wilmer L Sibbitt
- Department of Internal Medicine, Division of Rheumatology and School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
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Rodríguez-Silverio J, Ocampo-Torres MC, Fajardo-Hermosillo LD. [Characteristics of patients with systemic sclerosis who develop interstitial lung disease]. REVISTA MEDICA DEL INSTITUTO MEXICANO DEL SEGURO SOCIAL 2023; 61:S363-S371. [PMID: 37934671 PMCID: PMC10730132 DOI: 10.5281/zenodo.8383951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 01/07/2023] [Indexed: 11/09/2023]
Abstract
Background Systemic sclerosis associated-interstitial lung disease (SSc-ILD) show a high mortality. The factors associated SSc-ILD have shown variability in different populations. There are few studies in Mexican mestizos. Objective To analyze the epidemiological, clinical and paraclinical factors associated with SSc-ILD. Material and methods Cross-sectional study, where patients > 18 years of age with a diagnosis of SSc according to EULAR/ACR 2013 criteria and diagnosis of ILD by forced vital capacity (FVC) < 70% and > 5% of affected lung area on tomography were included. The strength of association of the factors for ILD was measured by odds ratio (OR) with 95% confidence intervals (95% CI). The significant variables were analyzed by multiple logistic regression with adjustment. Results Of the 80 patients with SSc, 38 (47.5%) had ILD. Risk factors such as smoking, higher activity index, lower FVC, anti-topoisomerase I antibodies, and protective factors such as a limited SSc, early capillaroscopic pattern, and anti-centromere antibodies (ACA) were associated with ILD. In the multivariate analysis, a higher activity index with OR 4.17, (95% CI 2.01-8.65) persisted as a risk factor, while ACA with OR 0.17, (95% CI 0.03-0.85) persisted as a protective factor associated with SSc-ILD. Conclusions A higher index of activity and ACA persisted as factors associated with SSc-ILD.
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Affiliation(s)
- Juan Rodríguez-Silverio
- Instituto Mexicano del Seguro Social, Centro Médico Nacional de Occidente, Hospital de Especialidades, Servicio de Reumatología. Guadalajara, Jalisco, México. Instituto Mexicano del Seguro SocialMéxico
| | - Mario César Ocampo-Torres
- Instituto Mexicano del Seguro Social, Centro Médico Nacional Siglo XXI, Hospital de Especialidades, Servicio de Reumatología. Ciudad de México, México.Instituto Mexicano del Seguro SocialMéxico
| | - Luis Daniel Fajardo-Hermosillo
- Instituto Politécnico Nacional, Escuela Superior de Medicina. Ciudad de México, MéxicoInstituto Politécnico NacionalMéxico
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Di Maggio G, Confalonieri P, Salton F, Trotta L, Ruggero L, Kodric M, Geri P, Hughes M, Bellan M, Gilio M, Lerda S, Baratella E, Confalonieri M, Mondini L, Ruaro B. Biomarkers in Systemic Sclerosis: An Overview. Curr Issues Mol Biol 2023; 45:7775-7802. [PMID: 37886934 PMCID: PMC10604992 DOI: 10.3390/cimb45100490] [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: 09/02/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023] Open
Abstract
Systemic sclerosis (SSc) is a complex autoimmune disease characterized by significant fibrosis of the skin and internal organs, with the main involvement of the lungs, kidneys, heart, esophagus, and intestines. SSc is also characterized by macro- and microvascular damage with reduced peripheral blood perfusion. Several studies have reported more than 240 pathways and numerous dysregulation proteins, giving insight into how the field of biomarkers in SSc is still extremely complex and evolving. Antinuclear antibodies (ANA) are present in more than 90% of SSc patients, and anti-centromere and anti-topoisomerase I antibodies are considered classic biomarkers with precise clinical features. Recent studies have reported that trans-forming growth factor β (TGF-β) plays a central role in the fibrotic process. In addition, interferon regulatory factor 5 (IRF5), interleukin receptor-associated kinase-1 (IRAK-1), connective tissue growth factor (CTGF), transducer and activator of transcription signal 4 (STAT4), pyrin-containing domain 1 (NLRP1), as well as genetic factors, including DRB1 alleles, are implicated in SSc damage. Several interleukins (e.g., IL-1, IL-6, IL-10, IL-17, IL-22, and IL-35) and chemokines (e.g., CCL 2, 5, 23, and CXC 9, 10, 16) are elevated in SSc. While adiponectin and maresin 1 are reduced in patients with SSc, biomarkers are important in research but will be increasingly so in the diagnosis and therapeutic approach to SSc. This review aims to present and highlight the various biomarker molecules, pathways, and receptors involved in the pathology of SSc.
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Affiliation(s)
- Giuseppe Di Maggio
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Paola Confalonieri
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Francesco Salton
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Liliana Trotta
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Luca Ruggero
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Metka Kodric
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Pietro Geri
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Michael Hughes
- Division of Musculoskeletal and Dermatological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester M6 8HD, UK;
| | - Mattia Bellan
- Department of Translational Medicine, Università del Piemonte Orientale (UPO), 28100 Novara, Italy
- Center for Autoimmune and Allergic Disease (CAAD), Università del Piemonte Orientale (UPO), 28100 Novara, Italy
- Department of Medicine, Azienda Ospedaliero–Universitaria, Maggiore della Carità, 28100 Novara, Italy
| | - Michele Gilio
- Infectious Disease Unit, San Carlo Hospital, 85100 Potenza, Italy
| | - Selene Lerda
- Graduate School, University of Milan, 20149 Milano, Italy
| | - Elisa Baratella
- Department of Radiology, Cattinara Hospital, University of Trieste, 34149 Trieste, Italy
| | - Marco Confalonieri
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Lucrezia Mondini
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
| | - Barbara Ruaro
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, Hospital of Cattinara, University of Trieste, 34149 Trieste, Italy; (G.D.M.); (M.K.); (P.G.); (L.M.)
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Carbone RG, Monselise A, Barisione E, Fontana V, Paredi P, Puppo F. Pulmonary hypertension in systemic sclerosis with usual interstitial pneumonia. Intern Emerg Med 2023:10.1007/s11739-023-03267-y. [PMID: 37069417 DOI: 10.1007/s11739-023-03267-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/31/2023] [Indexed: 04/19/2023]
Abstract
Retrospective study comparing pulmonary hypertension risk in systemic sclerosis (SSc) and non-SSc interstitial lung disease patients with usual interstitial pneumonia (UIP) and non-specific interstitial pneumonia (NSIP). Retrospective analysis of 144 interstitial lung disease patients, 53 SSc (32 UIP and 21 NSIP) and 91 non-SSc (47 UIP and 44 NSIP). Pulmonary hypertension was diagnosed as pulmonary systolic artery pressure (PAPs) > 25 mmHg. All SSc and non-SSc patients with pulmonary hypertension were classified WHO Group 3. Pulmonary hypertension was identified in 21/32 (65.6%), 9/21 (42.8%), 14/47 (29.7%), and 28/44 (45.4%) SSc-UIP, SSc-NSIP, control-UIP, and control-NSIP groups, respectively. PAPs mean of SSc-UIP group was higher than control-UIP group (32.6 ± 9.8 vs 28.5 ± 6.6, p-value = 0.02). PAPs mean of SSc-NSIP group was lower than control-NSIP group (27.0 ± 7.1 vs 33.9 ± 8.8, p = 0.002). Frequency of patients with PAP > 25 mmHg in SSc-UIP group was 60% higher in comparison to control-UIP (OR = 1.62, 95% CI 0.51-5.16) and SSc-NSIP (OR = 1.60, 95% CI 0.45-5.70) groups. Logistic regression analysis estimating the linear trend per ten-unit increase in PAPs levels demonstrated an increment for the SSc-UIP group compared to the control-UIP (OR = 2.64, 95% CI 1.25-5.58, p = 0.01) and the control-NSIP (OR = 6.34, 95% CI 2.82-14.3, p < 0.001) groups. The case-control study confirms that pulmonary hypertension is frequently found in SSc patients and demonstrates, for the first time, a significant increased risk of pulmonary hypertension among SSc-UIP patients.
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Affiliation(s)
| | | | | | - Vincenzo Fontana
- Clinical Epidemiology Unit, IRCCS San Martino Hospital, Genoa, Italy
| | | | - Francesco Puppo
- Department of Internal Medicine, University of Genoa, Genoa, Italy.
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Wang N, Zhang Q, Sun W, Yang X, Huang H, Xu Z. Exome sequencing link mutation in RGPD4 with systemic sclerosis-associated interstitial lung disease and the low level of testosterone—an exploration study. Front Oncol 2022; 12:956552. [PMID: 36158696 PMCID: PMC9492842 DOI: 10.3389/fonc.2022.956552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/15/2022] [Indexed: 11/22/2022] Open
Abstract
Background Interstitial lung disease (ILD) is the most common and potentially most devastating manifestation of SSc in pulmonary involvement. However, the mechanism for systemic sclerosis-associated ILD (SSc-ILD) is unclear. This work aims to explore the potential candidates for SSc-ILD upon whole exome sequencing (WES) and attempts to analyze the possible pathogenesis of SSc-ILD from the perspective of the genetic level. Materials Variants were confirmed by whole exome sequencing (WES), and SKAT analysis was employed to explore the most differential variants. Targeted variants were performed in biological functions, associated with clinical manifestations, and the probable change of downstream. Results By WES and SKAT analysis of SSc with and without ILD, only the variants of RGPD4 achieved statistical power (P < 2.51 × 10-6, P-FDR = 0.025, OR = 15.95). A total of 20 rare functional variants (missense, truncating, splicing) were tested for the RGPD4 gene, and five truncating and damaging missense variants were identified. Carriers showed the older inclusion age (P = 0.02) and the higher frequency use of prednisone (P=0.02) compared to the non-carriers. Further analysis illustrated that carriers showed lower levels of TES in comparison to non-carriers but did not reach statistical difference (P = 0.08). In bivariate correlation analysis, we analyzed the relationship between the mutant status of RGPD4 and the levels of sex hormones after adjusting for age confounders. Only the level of TES showed a negative correlation with the mutant status (B = -0.509, P = 0.037). Conclusion The variants of RGPD4 might contribute to the ILD development of SSc and might also be a causative factor of lower TES among SSc-ILD, which provided insight to a better understanding of pathobiology of SSc-ILD, and androgen hormone supplement might be a therapeutic target in this debilitating disease.
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Affiliation(s)
- Na Wang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Qian Zhang
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Wei Sun
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Xiaoyu Yang
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Hui Huang
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Zuojun Xu
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
- *Correspondence: Zuojun Xu,
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Ahmed S, Handa R. Management of Connective Tissue Disease-related Interstitial Lung Disease. CURRENT PULMONOLOGY REPORTS 2022; 11:86-98. [PMID: 35530438 PMCID: PMC9062859 DOI: 10.1007/s13665-022-00290-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2022] [Indexed: 01/16/2023]
Abstract
Purpose of Review This review aims to collate current evidence on the screening, diagnosis, and treatment of various connective tissue disease (CTD)–associated interstitial lung diseases (CTD-ILD) and present a contemporary framework for the management of such patients. It also seeks to summarize treatment outcomes including efficacy and safety of immunosuppressants, anti-fibrotics, and stem cell transplantation in CTD-ILD. Recent Findings Screening for ILD has been augmented by the use of artificial intelligence, ultra-low dose computerized tomography (CT) of the chest, and the use of chest ultrasound. Serum biomarkers have not found their way into clinical practice as yet. Identifying patients who need treatment and choosing the appropriate therapy is important to minimize the risk of therapy-related toxicity. The first-line drugs for systemic sclerosis (SSc) ILD include mycophenolate and cyclophosphamide. Nintedanib, an anti-fibrotic tyrosine kinase inhibitor, is approved for use in SSc-ILD. The US Food and Drug Administration (FDA) has recently approved tocilizumab subcutaneous injection for slowing the rate of decline in pulmonary function in adult patients with SSc-ILD. Autologous stem cell transplantation may have a role in select cases of SSc-ILD. Summary CTD-ILD is a challenging area with diverse entities and variable outcomes. High-resolution CT is the investigative modality of choice. Treatment decisions need to be individualized and are based on patient symptoms, lung function, radiologic abnormalities, and the risk of disease progression. Precision medicine may play an important role in determining the optimal therapy for an individual patient in the future.
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Affiliation(s)
- Sakir Ahmed
- Department of Clinical Immunology & Rheumatology, Kalinga Institute of Medical Sciences (KIMS), KIIT University, Bhubaneswar, India
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Xu Z, Chen C. The Downregulation of PTGS2 Mediated by ncRNAs is Tightly Correlated with Systemic Sclerosis-Interstitial Lung Disease. Front Genet 2022; 12:795034. [PMID: 35096012 PMCID: PMC8793859 DOI: 10.3389/fgene.2021.795034] [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: 10/14/2021] [Accepted: 12/21/2021] [Indexed: 11/29/2022] Open
Abstract
Background: Interstitial lung disease in systemic sclerosis (SSc-ILD) is one of the most severe complications of systemic sclerosis (SSc) and is the main cause of mortality. In this study, we aimed to explore the key genes in SSc-ILD and analyze the relationship between key genes and immune cell infiltration as well as the key genes relevant to the hallmarks of cancer. Methods: Weighted gene co-expression network analysis (WGCNA) algorithm was implemented to explore hub genes in SSc-ILD samples from the Gene Expression Omnibus (GEO) database. Logistic regression analysis was performed to screen and verify the key gene related to SSc-ILD. CIBERSORT algorithms were utilized to analyze immune cell infiltration. Moreover, the correlation between the key genes and genes relevant to cancer was also evaluated. Furthermore, non-coding RNAs (ncRNAs) linking to PTGS2 were also explored. Results: In this study, we first performed WGCNA analysis for three GEO databases to find the potential hub genes in SSc-ILD. Subsequently, we determined PTGS2 was the key gene in SSC-ILD. Furthermore, in CIBERSORT analyses, PTGS2 were tightly correlated with immune cells such as regulatory T cells (Tregs) and was negatively correlated with CD20 expression. Moreover, PTGS2 was associated with tumor growth. Then, MALAT1, NEAT1, NORAD, XIST identified might be the most potential upstream lncRNAs, and LIMS1 and RANBP2 might be the two most potential upstream circRNAs. Conclusion: Collectively, our findings elucidated that ncRNAs-mediated downregulation of PTGS2, as a key gene in SSc-ILD, was positively related to the occurrence of SSc-ILD and abnormal immunocyte infiltration. It could be a promising factor for SSc-ILD progression to malignancy.
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Affiliation(s)
- Zhixiao Xu
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chengshui Chen
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.,The Interventional Pulmonary Key Laboratory of Zhejiang Province, Wenzhou, China
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Shao T, Shi X, Yang S, Zhang W, Li X, Shu J, Alqalyoobi S, Zeki AA, Leung PS, Shuai Z. Interstitial Lung Disease in Connective Tissue Disease: A Common Lesion With Heterogeneous Mechanisms and Treatment Considerations. Front Immunol 2021; 12:684699. [PMID: 34163483 PMCID: PMC8215654 DOI: 10.3389/fimmu.2021.684699] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 05/17/2021] [Indexed: 01/11/2023] Open
Abstract
Connective tissue disease (CTD) related interstitial lung disease (CTD-ILD) is one of the leading causes of morbidity and mortality of CTD. Clinically, CTD-ILD is highly heterogenous and involves rheumatic immunity and multiple manifestations of respiratory complications affecting the airways, vessels, lung parenchyma, pleura, and respiratory muscles. The major pathological features of CTD are chronic inflammation of blood vessels and connective tissues, which can affect any organ leading to multi-system damage. The human lung is particularly vulnerable to such damage because anatomically it is abundant with collagen and blood vessels. The complex etiology of CTD-ILD includes genetic risks, epigenetic changes, and dysregulated immunity, which interact leading to disease under various ill-defined environmental triggers. CTD-ILD exhibits a broad spectra of clinical manifestations: from asymptomatic to severe dyspnea; from single-organ respiratory system involvement to multi-organ involvement. The disease course is also featured by remissions and relapses. It can range from stability or slow progression over several years to rapid deterioration. It can also present clinically as highly progressive from the initial onset of disease. Currently, the diagnosis of CTD-ILD is primarily based on distinct pathology subtype(s), imaging, as well as related CTD and autoantibodies profiles. Meticulous comprehensive clinical and laboratory assessment to improve the diagnostic process and management strategies are much needed. In this review, we focus on examining the pathogenesis of CTD-ILD with respect to genetics, environmental factors, and immunological factors. We also discuss the current state of knowledge and elaborate on the clinical characteristics of CTD-ILD, distinct pathohistological subtypes, imaging features, and related autoantibodies. Furthermore, we comment on the identification of high-risk patients and address how to stratify patients for precision medicine management approaches.
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Affiliation(s)
- Tihong Shao
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- Division of Rheumatology/Allergy and Clinical Immunology, University of California, Davis, Davis, CA, United States
| | - Xiaodong Shi
- Rheumatology, First Hospital of Jilin University, Changchun, China
| | - Shanpeng Yang
- Department of Pharmacy, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Wei Zhang
- Department of Pathology, The First Affiliated Hospital (Yijishan Hospital) of Wannan Medical College, Wuhu, China
| | - Xiaohu Li
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jingwei Shu
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Shehabaldin Alqalyoobi
- Internal Medicine - Pulmonary, Critical Care, and Sleep Medicine, Brody School of Medicine, Greenville, NC, United States
| | - Amir A. Zeki
- University of California (U.C.), Davis, Lung Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, U.C. Davis School of Medicine, University of California, Davis, Davis, CA, United States
| | - Patrick S. Leung
- Division of Rheumatology/Allergy and Clinical Immunology, University of California, Davis, Davis, CA, United States
| | - Zongwen Shuai
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
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10
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Prevalence of interstitial lung disease in polymyositis and dermatomyositis: A meta-analysis from 2000 to 2020. Semin Arthritis Rheum 2020; 51:175-191. [PMID: 33383294 DOI: 10.1016/j.semarthrit.2020.11.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/18/2020] [Accepted: 11/12/2020] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Interstitial lung disease (ILD) is the most important prognostic factor for mortality in patients with polymyositis (PM) and dermatomyositis (DM), but the prevalence of ILD in PM/DM may vary between countries. The aim of this study was to determine the overall prevalence of ILD in global patients with PM/DM. METHODS We performed a systematic literature review of studies published from Jan 1, 2000 to April 30, 2020 on ILD and PM/DM. We extracted data and pooled the prevalence by using a random-effect model due to high heterogeneity. Heterogeneity was assessed by subgroup analysis and sensitivity analysis. RESULTS A total of 34 studies with 10,130 patients were included in our meta-analysis. Pooled data demonstrated that the global prevalence of ILD in patients with PM/DM was 0.41 (95% confidence interval [CI] 0.35-0.48). However, this prevalence varied with geographical locations and time trends. The prevalence of ILD in PM/DM was 0.5 (95% CI 0.42-0.57) in Asia, 0.23 (95% CI 0.15-0.31) in America, and 0.26 (95% CI 0.18-0.34) in Europe. A higher prevalence of ILD was reported in studies published in 2011-2015 (0.43, 95% CI 0.34-0.52) and 2016-2020 (0.45, 95% CI 0.35-0.54), compared with those published in 2000-2010 (0.27, 95% CI 0.16-0.39). The pooled prevalence of ILD in patients with DM, PM, and clinically amyopathic dermatomyositis subtype was 0.42 (95% CI 0.35-0.49), 0.35 (95% CI 0.27-0.42), and 0.53 (95% CI 0.32-0.74), respectively. Patients with anti-Jo-1 and anti-melanoma differentiation-associated gene 5 antibodies were more likely to develop ILD than other myositis-specific autoantibodies. CONCLUSION The global prevalence of ILD in patients with PM/DM was approximately 41% and the condition was predominant in Asians. This highlights potential genetic and environmental differences in the pathogenesis of ILD in patients with PM/DM. More studies are required to elucidate the specific associations.
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11
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Abstract
PURPOSE OF REVIEW In this review, the authors discuss systemic sclerosis-associated interstitial lung disease (SSc-ILD) with a focus on recent developments in diagnosis, surveillance, and management. RECENT FINDINGS With advances in the management of SSc, the importance of ILD has been increasingly recognized and is the leading cause of mortality. Early detection is essential, and a combination of lung function testing and chest imaging are key tools in diagnosis and surveillance. The foundation of treatment is immunomodulation with recent studies identifying several potential new agents. The use of therapies targeting pro-fibrotic pathways have demonstrated significant effects on lung function decline and represent the latest advance in therapy for SSc-ILD. SUMMARY Recent studies support the use of newer therapies in SSc-ILD including antifibrotic agents. The identification and management of comorbidities is important, and lung transplantation is a viable option for patients with advanced disease.
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12
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Tiniakou E, Fava A, McMahan ZH, Guhr T, O’Meally RN, Shah AA, Wigley FM, Cole RN, Boin F, Darrah E. Definition of Naturally Processed Peptides Reveals Convergent Presentation of Autoantigenic Topoisomerase I Epitopes in Scleroderma. Arthritis Rheumatol 2020; 72:1375-1384. [PMID: 32162841 PMCID: PMC7486267 DOI: 10.1002/art.41248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 03/03/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Autoimmune responses to DNA topoisomerase I (topo I) are found in a subset of scleroderma patients who are at high risk for interstitial lung disease (ILD) and mortality. Anti-topo I antibodies (ATAs) are associated with specific HLA-DRB1 alleles, and the frequency of HLA-DR-restricted topo I-specific CD4+ T cells is associated with the presence, severity, and progression of ILD. Although this strongly implicates the presentation of topo I peptides by HLA-DR in scleroderma pathogenesis, the processing and presentation of topo I has not been studied. METHODS We developed a natural antigen processing assay (NAPA) to identify putative CD4+ T cell epitopes of topo I presented by monocyte-derived dendritic cells (mo-DCs) from 6 ATA-positive patients with scleroderma. Mo-DCs were pulsed with topo I protein, HLA-DR-peptide complexes were isolated, and eluted peptides were analyzed by mass spectrometry. We then examined the ability of these naturally presented peptides to induce CD4+ T cell activation in 11 ATA-positive and 11 ATA-negative scleroderma patients. RESULTS We found that a common set of 10 topo I epitopes was presented by Mo-DCs from scleroderma patients with diverse HLA-DR variants. Sequence analysis revealed shared peptide-binding motifs within the HLA-DRβ chains of ATA-positive patients and a subset of topo I epitopes with distinct sets of anchor residues capable of binding to multiple different HLA-DR variants. The NAPA-derived epitopes elicited robust CD4+ T cell responses in 73% of ATA-positive patients (8 of 11), and the number of epitopes recognized correlated with ILD severity (P = 0.025). CONCLUSION These findings mechanistically implicate the presentation of a convergent set of topo I epitopes in the development of scleroderma.
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Affiliation(s)
- Eleni Tiniakou
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
| | - Andrea Fava
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
| | - Zsuzsanna H. McMahan
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
| | - Tara Guhr
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
| | - Robert N. O’Meally
- Mass Spectrometry and Proteomics Facility, Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Ami A. Shah
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
| | - Fredrick M. Wigley
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
| | - Robert N. Cole
- Mass Spectrometry and Proteomics Facility, Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Francesco Boin
- Division of Rheumatology, Department of Medicine, University of California, San Francisco, CA 94122, USA
| | - Erika Darrah
- Division of Rheumatology, Johns Hopkins University, School of Medicine, Baltimore, MD 21224, USA
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13
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Khanna D, Tashkin DP, Denton CP, Renzoni EA, Desai SR, Varga J. Etiology, Risk Factors, and Biomarkers in Systemic Sclerosis with Interstitial Lung Disease. Am J Respir Crit Care Med 2020; 201:650-660. [PMID: 31841044 PMCID: PMC7068837 DOI: 10.1164/rccm.201903-0563ci] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Systemic sclerosis (SSc) is a complex, multiorgan, autoimmune disease. Lung fibrosis occurs in ∼80% of patients with SSc; 25% to 30% develop progressive interstitial lung disease (ILD). The pathogenesis of fibrosis in SSc-associated ILD (SSc-ILD) involves cellular injury, activation/differentiation of mesenchymal cells, and morphological/biological changes in epithelial/endothelial cells. Risk factors for progressive SSc-ILD include older age, male sex, degree of lung involvement on baseline high-resolution computed tomography imaging, reduced DlCO, and reduced FVC. SSc-ILD does not share the genetic risk architecture observed in idiopathic pulmonary fibrosis (IPF), with key risk factors yet to be identified. Presence of anti-Scl-70 antibodies and absence of anti-centromere antibodies indicate increased likelihood of progressive ILD. Elevated levels of serum Krebs von den Lungen-6 and C-reactive protein are both associated with SSc-ILD severity and predict SSc-ILD progression. A promising prognostic indicator is serum chemokine (C-C motif) ligand 18. SSc-ILD shares similarities with IPF, although clear differences exist. Histologically, a nonspecific interstitial pneumonia pattern is commonly observed in SSc-ILD, whereas IPF is defined by usual interstitial pneumonia. The course of SSc-ILD is variable, ranging from minor, stable disease to a progressive course, whereas all patients with IPF experience progression of disease. Although appropriately treated patients with SSc-ILD have better chances of stabilization and survival, a relentlessly progressive course, akin to IPF, is seen in a minority. Better understanding of cellular and molecular pathogenesis, genetic risk, and distinctive features of SSc-ILD and identification of robust prognostic biomarkers are needed for optimal disease management.
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Affiliation(s)
- Dinesh Khanna
- Division of Rheumatology, Department of Internal Medicine, University of Michigan Scleroderma Program, Ann Arbor, Michigan
| | - Donald P Tashkin
- Department of Medicine, David Geffen School of Medicine at UCLA, University of California Los Angeles, Los Angeles, California
| | - Christopher P Denton
- University College London Centre for Rheumatology and Connective Tissue Diseases, Royal Free Hospital, London, United Kingdom
| | - Elisabetta A Renzoni
- Interstitial Lung Disease Unit and.,National Institute for Health Research Clinical Research Facility, Royal Brompton Hospital, London, United Kingdom
| | - Sujal R Desai
- National Heart and Lung Institute, Imperial College London, London, United Kingdom.,Department of Radiology, Royal Brompton & Harefield National Health Services Foundation Trust Hospital, London, United Kingdom; and
| | - John Varga
- Northwestern Scleroderma Program, Feinberg School of Medicine, Chicago, Illinois
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14
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Nihtyanova SI, Denton CP. Pathogenesis of systemic sclerosis associated interstitial lung disease. JOURNAL OF SCLERODERMA AND RELATED DISORDERS 2020; 5:6-16. [PMID: 35382227 PMCID: PMC8922569 DOI: 10.1177/2397198320903867] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/24/2019] [Indexed: 12/12/2022]
Abstract
Systemic sclerosis is an autoimmune disease leading to vasculopathy and fibrosis
of skin and internal organs. Despite likely shared pathogenic mechanisms, the
patterns of skin and lung fibrosis differ. Pathogenesis of interstitial lung
disease, a major cause of death in systemic sclerosis, reflects the intrinsic
disease pathobiology and is associated with distinct clinical phenotypes and
laboratory characteristics. The commonest histological pattern of systemic
sclerosis–interstitial lung disease is non-specific interstitial pneumonia.
Systemic sclerosis–interstitial lung disease pathogenesis involves multiple
components, including susceptibility and triggering factors, which could be
genetic or environmental. The process is amplified likely through ongoing
inflammation and the link between inflammatory activity and fibrosis with IL6
emerging as a key mediator. The disease is driven by epithelial injury,
reflected by markers in the serum, such as surfactant proteins and KL-6. In
addition, mediators that are produced by epithelial cells and that regulate
inflammatory cell trafficking may be important, especially CCL2. Other factors,
such as CXCL4 and CCL18, point towards immune-mediated damage or injury
response. Monocytes and alternatively activated macrophages appear to be
important. Transforming growth factor beta appears central to pathogenesis and
regulates epithelial repair and fibroblast activation. Understanding
pathogenesis may help to unravel the stages of systemic sclerosis–interstitial
lung disease, risks of progression and determinants of outcome. With this
article, we set out to review the multiple factors, including genetic,
environmental, cellular and molecular, that may be involved in the pathogenesis
of systemic sclerosis–interstitial lung disease and the mechanisms leading to
sustained fibrosis. We propose a model for the pathogenesis of systemic
sclerosis–interstitial lung disease, based on the available literature.
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Affiliation(s)
- Svetlana I Nihtyanova
- Centre for Rheumatology and Connective Tissue Diseases, University College London, London, UK
| | - Christopher P Denton
- Centre for Rheumatology and Connective Tissue Diseases, University College London, London, UK
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15
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Perelas A, Silver RM, Arrossi AV, Highland KB. Systemic sclerosis-associated interstitial lung disease. THE LANCET RESPIRATORY MEDICINE 2020; 8:304-320. [PMID: 32113575 DOI: 10.1016/s2213-2600(19)30480-1] [Citation(s) in RCA: 184] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/19/2019] [Accepted: 12/19/2019] [Indexed: 12/15/2022]
Abstract
Systemic sclerosis is an autoimmune connective tissue disease, which is characterised by immune dysregulation and progressive fibrosis that typically affects the skin, with variable internal organ involvement. It is a rare condition that affects mostly young and middle-aged women, resulting in disproportionate morbidity and mortality. Currently, interstitial lung disease is the most common cause of death among patients with systemic sclerosis, with a prevalence of up to 30% and a 10-year mortality of up to 40%. Interstitial lung disease is more common among African Americans and in people with the diffuse cutaneous form of systemic sclerosis or anti-topoisomerase 1 antibodies. Systemic sclerosis-associated interstitial lung disease most commonly presents with dyspnoea, cough, and a non-specific interstitial pneumonia pattern on CT scan, with a minority of cases fulfilling the criteria for usual interstitial pneumonia. The standard therapy has traditionally been combinations of immunosuppressants, particularly mycophenolate mofetil or cyclophosphamide. These immunosuppressants can be supplemented by targeted biological and antifibrotic therapies, whereas autologous haematopoietic stem-cell transplantation and lung transplantation are reserved for refractory cases.
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Affiliation(s)
- Apostolos Perelas
- Division of Pulmonary and Critical Care Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Richard M Silver
- Division of Rheumatology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - Andrea V Arrossi
- Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH, USA
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Defining genetic risk factors for scleroderma-associated interstitial lung disease : IRF5 and STAT4 gene variants are associated with scleroderma while STAT4 is protective against scleroderma-associated interstitial lung disease. Clin Rheumatol 2020; 39:1173-1179. [PMID: 31916109 PMCID: PMC7142048 DOI: 10.1007/s10067-019-04922-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/19/2019] [Accepted: 12/29/2019] [Indexed: 02/03/2023]
Abstract
Although several genetic associations with scleroderma (SSc) are defined, very little is known on genetic susceptibility to SSc-associated interstitial lung disease (SSc-ILD). A number of common polymorphisms have been associated with SSc-ILD, but most have not been replicated in separate populations. Four SNPs in IRF5, and one in each of STAT4, CD226 and IRAK1, selected as having been previously the most consistently associated with SSc-ILD, were genotyped in 612 SSc patients, of European descent, of whom 394 had ILD. The control population (n = 503) comprised individuals of European descent from the 1000 Genomes Project. After Bonferroni correction, two of the IRF5 SNPs, rs2004640 (OR (95% CI)1.30 (1.10–1.54), pcorr = 0.015) and rs10488631 (OR 1.48 (1.14–1.92), pcorr = 0.022), and the STAT4 SNP rs7574865 (OR 1.43 (1.18–1.73), pcorr = 0.0015) were significantly associated with SSc compared with controls. However, none of the SNPs were significantly different between patients with SSc-ILD and controls. Two SNPs in IRF5, rs10488631 (OR 1.72 (1.24–2.39), pcorr = 0.0098), and rs2004640 (OR 1.39 (1.11–1.75), pcorr = 0.03), showed a significant difference in allele frequency between controls and patients without ILD, as did STAT4 rs7574865 (OR 1.86 (1.45–2.38), pcorr = 6.6 × 10−6). A significant difference between SSc with and without ILD was only observed for STAT4 rs7574865, being less frequent in patients with ILD (OR 0.66 (0.51–0.85), pcorr = 0.0084). In conclusion, IRF5 rs2004640 and rs10488631, and STAT4 rs7574865 were significantly associated with SSc as a whole. Only STAT4 rs7574865 showed a significant difference in allele frequency in SSc-ILD, with the T allele being protective against ILD.Key points • We confirm the associations of the IRF5 SNPs rs2004640 and rs10488631, and the STAT4 SNP rs7574865, with SSc as a whole. • None of the tested SNPs were risk factors for SSc-ILD specifically. • The STAT4 rs7574865 T allele was protective against the development of lung fibrosis in SSc patients. • Further work is required to understand the genetic basis of lung fibrosis in association with scleroderma. |
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Stevens AM, Torok KS, Li SC, Taber SF, Lu TT, Zulian F. Immunopathogenesis of Juvenile Systemic Sclerosis. Front Immunol 2019; 10:1352. [PMID: 31293569 PMCID: PMC6603145 DOI: 10.3389/fimmu.2019.01352] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 05/28/2019] [Indexed: 12/13/2022] Open
Abstract
Juvenile-onset systemic sclerosis (jSSc) is a rare and severe autoimmune disease with associated life-threatening organ inflammation and evidence of fibrosis. The organ manifestations of jSSc resemble adult SSc, but with better outcomes and survival. The etiology of jSSc appears to reflect adult-onset SSc, with similar inflammatory mediators and autoantibodies, but with a significant population of children with uncharacterized anti-nuclear antibodies. The genetics of patients with jSSc differ from women with SSc, resembling instead the genes of adult males with SSc, with additional HLA genes uniquely associated with childhood-onset disease. Current treatments are aimed at inhibiting the inflammatory aspect of disease, but important mechanisms of fibrosis regulated by dermal white adipose tissue dendritic cells may provide an avenue for targeting and potentially reversing the fibrotic stage.
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Affiliation(s)
- Anne M. Stevens
- Division of Rheumatology, Department of Pediatrics, University of Washington, Seattle, WA, United States
| | - Kathryn S. Torok
- Division of Pediatric Rheumatology, Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA, United States
| | - Suzanne C. Li
- Division of Pediatric Rheumatology, Department of Pediatrics, Hackensack University Medical Center, Hackensack Meridian School of Medicine at Seton Hall University, Hackensack, NJ, United States
| | - Sarah F. Taber
- Division of Pediatric Rheumatology, Department of Rheumatology, Hospital for Special Surgery, New York, NY, United States
- Department of Pediatrics, Weill Cornell Medicine, New York, NY, United States
| | - Theresa T. Lu
- Division of Pediatric Rheumatology, Department of Rheumatology, Hospital for Special Surgery, New York, NY, United States
- HSS Research Institute, Hospital for Special Surgery, New York, NY, United States
- Department of Microbiology and Immunology, Weill Cornell Medicine, New York, NY, United States
| | - Francesco Zulian
- Rheumatology Unit, Department of Woman's and Child's Health, University of Padua, Padua, Italy
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