51
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Abstract
Sarcoidosis is a highly variable granulomatous multisystem syndrome. It affects individuals in the prime years of life; both the frequency and severity of sarcoidosis are greater in economically disadvantaged populations. The diagnosis, assessment, and management of pulmonary sarcoidosis have evolved as new technologies and therapies have been adopted. Transbronchial needle aspiration guided by endobronchial ultrasound has replaced mediastinoscopy in many centers. Advanced imaging modalities, such as fluorodeoxyglucose positron emission tomography scanning, and the widespread availability of magnetic resonance imaging have led to more sensitive assessment of organ involvement and disease activity. Although several new insights about the pathogenesis of sarcoidosis exist, no new therapies have been specifically developed for use in the disease. The current or proposed use of immunosuppressive medications for sarcoidosis has been extrapolated from other disease states; various novel pathways are currently under investigation as therapeutic targets. Coupled with the growing recognition of corticosteroid toxicities for managing sarcoidosis, the use of corticosteroid sparing anti-sarcoidosis medications is likely to increase. Besides treatment of granulomatous inflammation, recognition and management of the non-granulomatous complications of pulmonary sarcoidosis are needed for optimal outcomes in patients with advanced disease.
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Affiliation(s)
- Daniel A Culver
- Department of Pulmonary Medicine, Respiratory Institute, Department of Inflammation and Immunity, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
| | - Marc A Judson
- Division of Pulmonary and Critical Care Medicine, Albany Medical College, Albany, NY, USA
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52
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Celada LJ, Kropski JA, Herazo-Maya JD, Luo W, Creecy A, Abad AT, Chioma OS, Lee G, Hassell NE, Shaginurova GI, Wang Y, Johnson JE, Kerrigan A, Mason WR, Baughman RP, Ayers GD, Bernard GR, Culver DA, Montgomery CG, Maher TM, Molyneaux PL, Noth I, Mutsaers SE, Prele CM, Peebles RS, Newcomb DC, Kaminski N, Blackwell TS, Van Kaer L, Drake WP. PD-1 up-regulation on CD4 + T cells promotes pulmonary fibrosis through STAT3-mediated IL-17A and TGF-β1 production. Sci Transl Med 2019; 10:10/460/eaar8356. [PMID: 30257954 DOI: 10.1126/scitranslmed.aar8356] [Citation(s) in RCA: 198] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 05/02/2018] [Accepted: 09/05/2018] [Indexed: 12/11/2022]
Abstract
Pulmonary fibrosis is a progressive inflammatory disease with high mortality and limited therapeutic options. Previous genetic and immunologic investigations suggest common intersections between idiopathic pulmonary fibrosis (IPF), sarcoidosis, and murine models of pulmonary fibrosis. To identify immune responses that precede collagen deposition, we conducted molecular, immunohistochemical, and flow cytometric analysis of human and murine specimens. Immunohistochemistry revealed programmed cell death-1 (PD-1) up-regulation on IPF lymphocytes. PD-1+CD4+ T cells with reduced proliferative capacity and increased transforming growth factor-β (TGF-β)/interleukin-17A (IL-17A) expression were detected in IPF, sarcoidosis, and bleomycin CD4+ T cells. PD-1+ T helper 17 cells are the predominant CD4+ T cell subset expressing TGF-β. Coculture of PD-1+CD4+ T cells with human lung fibroblasts induced collagen-1 production. Strikingly, ex vivo PD-1 pathway blockade resulted in reductions in TGF-β and IL-17A expression from CD4+ T cells, with concomitant declines in collagen-1 production from fibroblasts. Molecular analysis demonstrated PD-1 regulation of the transcription factor STAT3 (signal transducer and activator of transcription 3). Chemical blockade of STAT3, using the inhibitor STATTIC, inhibited collagen-1 production. Both bleomycin administration to PD-1 null mice or use of antibody against programmed cell death ligand 1 (PD-L1) demonstrated significantly reduced fibrosis compared to controls. This work identifies a critical, previously unrecognized role for PD-1+CD4+ T cells in pulmonary fibrosis, supporting the use of readily available therapeutics that directly address interstitial lung disease pathophysiology.
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Affiliation(s)
- Lindsay J Celada
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
| | - Jonathan A Kropski
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Jose D Herazo-Maya
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT 06510, USA
| | - Weifeng Luo
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Amy Creecy
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Andrew T Abad
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Ozioma S Chioma
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Grace Lee
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Natalie E Hassell
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Guzel I Shaginurova
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Yufen Wang
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Joyce E Johnson
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Amy Kerrigan
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Wendi R Mason
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Robert P Baughman
- Division of Pulmonary, Critical Care and Sleep Medicine, University of Cincinnati Medical Center, Cincinnati, OH 45219, USA
| | - Gregory D Ayers
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Gordon R Bernard
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Daniel A Culver
- Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Courtney G Montgomery
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.,Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73126, USA
| | - Toby M Maher
- National Institute for Health Research Respiratory Biomedical Research Unit, Royal Brompton Hospital, London SW7 2AZ, UK.,Fibrosis Research Group, National Heart and Lung Institute, Imperial College, London SW7 2AZ, UK
| | - Philip L Molyneaux
- National Institute for Health Research Respiratory Biomedical Research Unit, Royal Brompton Hospital, London SW7 2AZ, UK.,Fibrosis Research Group, National Heart and Lung Institute, Imperial College, London SW7 2AZ, UK
| | - Imre Noth
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Steven E Mutsaers
- Centre for Cell Therapy and Regenerative Medicine, School of Biomedical Sciences, University of Western Australia, Nedlands, Western Australia 6009, Australia.,Institute for Respiratory Health, Centre for Respiratory Health, School of Biomedical Sciences, University of Western Australia, Nedlands, Western Australia 6009, Australia
| | - Cecilia M Prele
- Centre for Cell Therapy and Regenerative Medicine, School of Biomedical Sciences, University of Western Australia, Nedlands, Western Australia 6009, Australia.,Institute for Respiratory Health, Centre for Respiratory Health, School of Biomedical Sciences, University of Western Australia, Nedlands, Western Australia 6009, Australia
| | - R S Peebles
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.,Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Dawn C Newcomb
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.,Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Naftali Kaminski
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT 06510, USA
| | - Timothy S Blackwell
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Luc Van Kaer
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Wonder P Drake
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA. .,Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
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53
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Terasaki F, Azuma A, Anzai T, Ishizaka N, Ishida Y, Isobe M, Inomata T, Ishibashi-Ueda H, Eishi Y, Kitakaze M, Kusano K, Sakata Y, Shijubo N, Tsuchida A, Tsutsui H, Nakajima T, Nakatani S, Horii T, Yazaki Y, Yamaguchi E, Yamaguchi T, Ide T, Okamura H, Kato Y, Goya M, Sakakibara M, Soejima K, Nagai T, Nakamura H, Noda T, Hasegawa T, Morita H, Ohe T, Kihara Y, Saito Y, Sugiyama Y, Morimoto SI, Yamashina A. JCS 2016 Guideline on Diagnosis and Treatment of Cardiac Sarcoidosis - Digest Version. Circ J 2019; 83:2329-2388. [PMID: 31597819 DOI: 10.1253/circj.cj-19-0508] [Citation(s) in RCA: 218] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fumio Terasaki
- Medical Education Center / Department of Cardiology, Osaka Medical College
| | - Arata Azuma
- Department of Pulmonary Medicine, Nippon Medical School
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Nobukazu Ishizaka
- Department of Internal Medicine (III) / Department of Cardiology, Osaka Medical College
| | - Yoshio Ishida
- Department of Internal Medicine, Kaizuka City Hospital
| | - Mitsuaki Isobe
- Department of Cardiovascular Medicine, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University
| | - Takayuki Inomata
- Department of Cardiology, Kitasato University Kitasato Institute Hospital
| | | | - Yoshinobu Eishi
- Department of Human Pathology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University
| | - Masafumi Kitakaze
- Department of Clinical Medicine and Development, National Cerebral and Cardiovascular Center
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Yasushi Sakata
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine
| | | | | | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences
| | - Takatomo Nakajima
- Division of Cardiology, Saitama Cardiovascular and Respiratory Center
| | - Satoshi Nakatani
- Division of Functional Diagnostics, Department of Health Sciences, Osaka University Graduate School of Medicine
| | - Taiko Horii
- Department of Cardiovascular Surgery, Kagawa University School of Medicine
| | | | - Etsuro Yamaguchi
- Department of Respiratory Medicine and Allergology, Aichi Medical University School of Medicine
| | | | - Tomomi Ide
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Hideo Okamura
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | | | - Masahiko Goya
- Department of Cardiology, Tokyo Medical and Dental University
| | - Mamoru Sakakibara
- Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine
| | - Kyoko Soejima
- Department of Cardiology, Kyorin University Faculty of Medicine
| | - Toshiyuki Nagai
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | | | - Takashi Noda
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | - Takuya Hasegawa
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
| | | | - Tohru Ohe
- Department of Cardiology, Sakakibara Heart Institute of Okayama
| | - Yasuki Kihara
- Department of Cardiovascular Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Yoshihiko Saito
- Department of Cardiorenal Medicine and Metabolic Disease, Nara Medical University
| | - Yukihiko Sugiyama
- Division of Pulmonary Medicine, Department of Medicine, Jichi Medical University
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54
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Paplińska-Goryca M, Goryca K, Misiukiewicz-Stępień P, Nejman-Gryz P, Proboszcz M, Górska K, Maskey-Warzęchowska M, Krenke R. mRNA expression profile of bronchoalveolar lavage fluid cells from patients with idiopathic pulmonary fibrosis and sarcoidosis. Eur J Clin Invest 2019; 49:e13153. [PMID: 31246273 DOI: 10.1111/eci.13153] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 06/25/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Sarcoidosis and idiopathic pulmonary fibrosis (IPF) are two most frequent forms of interstitial lung diseases (ILDs). Cellular and biochemical composition of bronchoalveolar lavage fluid (BALf) was shown to reflect the fibrotic changes in the lung. However, the usefulness of BALf cellular profile evaluation in the diagnosis of ILDs is limited. The aim of the study was a multivariate, molecular analysis of BALf cells from IPF and sarcoidosis patients. METHODS Transcriptomic measurements were carried out using Affymetrix Human Gene 2.1 ST ArrayStrip in 21 samples: 9 IPF and 12 sarcoidosis. The mRNA expression for the most significantly differentiating genes was evaluated by real-time PCR in 32 samples (11 IPF and 21 sarcoidosis). RESULTS The number of genes differentially expressed between IPF and sarcoidosis groups was 4832 (13359 probesets). Cluster analysis indicated that sarcoidosis BALf cells are characterized by increased mRNA expression of genes associated with ribosome biogenesis. Clusters formed by genes with changed mRNA expression in IPF samples were implicated in the processes of cell adhesion and migration, metalloproteinase expression and negative regulation of cell proliferation. The GO analysis indicated that predominant biological processes associated with the differential mRNA gene expression of BALf cells were upregulation of neutrophils in IPF and lymphocytes in sarcoidosis. CONCLUSIONS Analysis of BALf from sarcoidosis and IPF showed highly different mRNA profile of cells. The most important biological processes observed at the molecular level in BALf cells were associated with ribosome biogenesis and proteasome apparatus in sarcoidosis and neutrophilic dysfunction in IPF.
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Affiliation(s)
- Magdalena Paplińska-Goryca
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Krzysztof Goryca
- Department of Genetics, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | | | - Patrycja Nejman-Gryz
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Małgorzata Proboszcz
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Katarzyna Górska
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Marta Maskey-Warzęchowska
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
| | - Rafał Krenke
- Department of Internal Medicine, Pulmonary Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
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55
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Ryu C, Brandsdorfer C, Adams T, Hu B, Kelleher DW, Yaggi M, Manning EP, Walia A, Reeves B, Pan H, Winkler J, Minasyan M, Dela Cruz CS, Kaminski N, Gulati M, Herzog EL. Plasma mitochondrial DNA is associated with extrapulmonary sarcoidosis. Eur Respir J 2019; 54:13993003.01762-2018. [PMID: 31273041 DOI: 10.1183/13993003.01762-2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 05/27/2019] [Indexed: 12/18/2022]
Abstract
Sarcoidosis is an unpredictable granulomatous disease in which African Americans disproportionately experience aggressive phenotypes. Mitochondrial DNA (mtDNA) released by cells in response to various stressors contributes to tissue remodelling and inflammation. While extracellular mtDNA has emerged as a biomarker in multiple diseases, its relevance to sarcoidosis remains unknown. We aimed to define an association between extracellular mtDNA and clinical features of sarcoidosis.Extracellular mtDNA concentrations were measured using quantitative PCR for the human MT-ATP6 gene in bronchoalveolar (BAL) and plasma samples from healthy controls and patients with sarcoidosis from The Yale Lung Repository; associations between MT-ATP6 concentrations and Scadding stage, extrapulmonary disease and demographics were sought. Results were validated in the Genomic Research in Alpha-1 Antitrypsin Deficiency and Sarcoidosis cohort.Relative to controls, MT-ATP6 concentrations in sarcoidosis subjects were robustly elevated in the BAL fluid and plasma, particularly in the plasma of patients with extrapulmonary disease. Relative to Caucasians, African Americans displayed excessive MT-ATP6 concentrations in the BAL fluid and plasma, for which the latter compartment correlated with significantly higher odds of extrapulmonary disease.Enrichments in extracellular mtDNA in sarcoidosis are associated with extrapulmonary disease and African American descent. Further study into the mechanistic basis of these clinical findings may lead to novel pathophysiologic and therapeutic insights.
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Affiliation(s)
- Changwan Ryu
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Caitlin Brandsdorfer
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Taylor Adams
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Buqu Hu
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Dylan W Kelleher
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Madeleine Yaggi
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Edward P Manning
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Anjali Walia
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Benjamin Reeves
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Hongyi Pan
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Julia Winkler
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Maksym Minasyan
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Charles S Dela Cruz
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Naftali Kaminski
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Mridu Gulati
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA.,Equal contribution
| | - Erica L Herzog
- Section of Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA .,Equal contribution
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56
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Kaiser Y, Eklund A, Grunewald J. Moving target: shifting the focus to pulmonary sarcoidosis as an autoimmune spectrum disorder. Eur Respir J 2019; 54:13993003.021532018. [PMID: 31000677 DOI: 10.1183/13993003.021532018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 04/01/2019] [Indexed: 12/27/2022]
Abstract
Despite more than a century of research, the causative agent(s) in sarcoidosis, a heterogeneous granulomatous disorder mainly affecting the lungs, remain(s) elusive. Following identification of genetic factors underlying different clinical phenotypes, increased understanding of CD4+ T-cell immunology, which is believed to be central to sarcoid pathogenesis, as well as the role of B-cells and other cells bridging innate and adaptive immunity, contributes to novel insights into the mechanistic pathways influencing disease resolution or chronicity. Hopefully, new perspectives and state-of-the-art technology will help to shed light on the still-elusive enigma of sarcoid aetiology. This perspective article highlights a number of recent advances in the search for antigenic targets in sarcoidosis, as well as the main arguments for sarcoidosis as a spectrum of autoimmune conditions, either as a result of an external (microbial) trigger and/or due to defective control mechanisms regulating the balance between T-cell activation and inhibition.
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Affiliation(s)
- Ylva Kaiser
- Respiratory Medicine Unit, Dept of Medicine, Solna and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden
| | - Anders Eklund
- Respiratory Medicine Unit, Dept of Medicine, Solna and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden
| | - Johan Grunewald
- Respiratory Medicine Unit, Dept of Medicine, Solna and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden
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57
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Abstract
Sarcoidosis is an inflammatory disorder of unknown cause that is characterized by granuloma formation in affected organs, most often in the lungs. Patients frequently suffer from cough, shortness of breath, chest pain and pronounced fatigue and are at risk of developing lung fibrosis or irreversible damage to other organs. The disease develops in genetically predisposed individuals with exposure to an as-yet unknown antigen. Genetic factors affect not only the risk of developing sarcoidosis but also the disease course, which is highly variable and difficult to predict. The typical T cell accumulation, local T cell immune response and granuloma formation in the lungs indicate that the inflammatory response in sarcoidosis is induced by specific antigens, possibly including self-antigens, which is consistent with an autoimmune involvement. Diagnosis can be challenging for clinicians because of the potential for almost any organ to be affected. As the aetiology of sarcoidosis is unknown, no specific treatment and no pathognomic markers exist. Thus, improved biomarkers to determine disease activity and to identify patients at risk of developing fibrosis are needed. Corticosteroids still constitute the first-line treatment, but new treatment strategies, including those targeting quality-of-life issues, are being evaluated and should yield appropriate, personalized and more effective treatments.
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58
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Chavarriaga-Restrepo A, López-Amaya JE, Mesa-Navas MA, Velásquez-Franco CJ. Sarcoidosis: muchas caras, una enfermedad. Revisión narrativa de la literatura. IATREIA 2019. [DOI: 10.17533/udea.iatreia.11] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
La sarcoidosis es una enfermedad granulomatosa sistémica de etiología desconocida. Esta puede afectar a pacientes de todas las latitudes y edades, siendo más frecuente entre la tercera y cuarta década de la vida con un segundo pico alrededor de los 50 años en las poblaciones escandinava y japonesa. Es más frecuente en mujeres y grave en la población afrodescendiente.Los antígenos que inician esta respuesta granulomatosa son desconocidos, pero se presume que son aerotransportados por la alta frecuencia de compromiso pulmonar en esta enfermedad. Su presentación clínica abarca una amplia gama de manifestaciones, desde formas agudas y limitadas hasta el compromiso crónico con daño orgánico progresivo y muerte. Su diagnóstico se basa en la existencia de los granulomas no caseificantes en los tejidos, con la exclusión de otras enfermedades, entre ellas infección por micobacterias.
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59
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Abstract
Hepatic granulomas are a common finding in systemic sarcoidosis, but most patients remain asymptomatic. Elevated alkaline phosphatase is the most common sign of hepatic sarcoidosis (HS). Lacking a specific diagnostic test, the diagnosis of HS is one of exclusion. Therapy may be indicated in a minority of patients to control symptoms, but the effects of therapy in the natural history of HS are unknown.
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Affiliation(s)
- Manoj Kumar
- Division of Gastroenterology, University of South Alabama College of Medicine, UCOM 6000, 75 University Boulevard South, Mobile, AL 36688, USA
| | - Jorge L Herrera
- Division of Gastroenterology, University of South Alabama College of Medicine, UCOM 6000, 75 University Boulevard South, Mobile, AL 36688, USA.
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60
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Clarke EL, Lauder AP, Hofstaedter CE, Hwang Y, Fitzgerald AS, Imai I, Biernat W, Rękawiecki B, Majewska H, Dubaniewicz A, Litzky LA, Feldman MD, Bittinger K, Rossman MD, Patterson KC, Bushman FD, Collman RG. Microbial Lineages in Sarcoidosis. A Metagenomic Analysis Tailored for Low-Microbial Content Samples. Am J Respir Crit Care Med 2019; 197:225-234. [PMID: 28846439 DOI: 10.1164/rccm.201705-0891oc] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
RATIONALE The etiology of sarcoidosis is unknown, but microbial agents are suspected as triggers. OBJECTIVES We sought to identify bacterial, fungal, or viral lineages in specimens from patients with sarcoidosis enriched relative to control subjects using metagenomic DNA sequencing. Because DNA from environmental contamination contributes disproportionately to samples with low authentic microbial content, we developed improved methods for filtering environmental contamination. METHODS We analyzed specimens from subjects with sarcoidosis (n = 93), control subjects without sarcoidosis (n = 72), and various environmental controls (n = 150). Sarcoidosis specimens consisted of two independent sets of formalin-fixed, paraffin-embedded lymph node biopsies, BAL, Kveim reagent, and fresh granulomatous spleen from a patient with sarcoidosis. All specimens were analyzed by bacterial 16S and fungal internal transcribed spacer ribosomal RNA gene sequencing. In addition, BAL was analyzed by shotgun sequencing of fractions enriched for viral particles, and Kveim and spleen were subjected to whole-genome shotgun sequencing. MEASUREMENTS AND MAIN RESULTS In one tissue set, fungi in the Cladosporiaceae family were enriched in sarcoidosis compared with nonsarcoidosis tissues; in the other tissue set, we detected enrichment of several bacterial lineages in sarcoidosis but not Cladosporiaceae. BAL showed limited enrichment of Aspergillus fungi. Several microbial lineages were detected in Kveim and spleen, including Cladosporium. No microbial lineage was enriched in more than one sample type after correction for multiple comparisons. CONCLUSIONS Metagenomic sequencing revealed enrichment of microbes in single types of sarcoidosis samples but limited concordance across sample types. Statistical analysis accounting for environmental contamination was essential to avoiding false positives.
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Affiliation(s)
| | | | - Casey E Hofstaedter
- 2 Division of Gastroenterology, Hepatology, and Nutrition, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and
| | | | | | | | | | | | | | - Anna Dubaniewicz
- 5 Department of Pulmonology, Medical University of Gdansk, Gdansk, Poland
| | - Leslie A Litzky
- 6 Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Michael D Feldman
- 6 Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Kyle Bittinger
- 2 Division of Gastroenterology, Hepatology, and Nutrition, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and
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61
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The composition of the pulmonary microbiota in sarcoidosis - an observational study. Respir Res 2019; 20:46. [PMID: 30819175 PMCID: PMC6396534 DOI: 10.1186/s12931-019-1013-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 02/20/2019] [Indexed: 12/27/2022] Open
Abstract
Background Sarcoidosis is a systemic disease of unknown etiology. The disease mechanisms are largely speculative and may include the role microbial patterns that initiate and drive an underlying immune process. The aim of this study was to characterize the microbiota of the lung of patients with sarcoidosis and compare its composition and diversity with the results from patients with other interstitial lung disease (ILD) and historic healthy controls. Methods Patients (sarcoidosis, n = 31; interstitial lung disease, n = 19) were recruited within the PULMOHOM study, a prospective cohort study to characterize inflammatory processes in pulmonary diseases. Bronchoscopy of the middle lobe or the lingula was performed and the recovered fluid was immediately sent for analysis of the pulmonary microbiota by 16sRNA gene sequencing. Subsequent bioinformatic analysis was performed to compare the groups. Results There were no significant differences between patients with sarcoidosis or other ILDs with regard to microbiome composition and diversity. In addition, the abundance of the genera Atopobium, Fusobacterium, Mycobacterium or Propionibacterium were not different between the two groups. There were no gross differences to historical healthy controls. Conclusion The analysis of the pulmonary microbiota based on 16sRNA gene sequencing did not show a significant dysbiosis in patients with sarcoidosis as compared to other ILD patients. These data do not exclude a microbiological component in the pathogenesis of sarcoidosis. Electronic supplementary material The online version of this article (10.1186/s12931-019-1013-2) contains supplementary material, which is available to authorized users.
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62
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Abstract
Serum amyloid A (SAA) proteins were isolated and named over 50 years ago. They are small (104 amino acids) and have a striking relationship to the acute phase response with serum levels rising as much as 1000-fold in 24 hours. SAA proteins are encoded in a family of closely-related genes and have been remarkably conserved throughout vertebrate evolution. Amino-terminal fragments of SAA can form highly organized, insoluble fibrils that accumulate in “secondary” amyloid disease. Despite their evolutionary preservation and dynamic synthesis pattern SAA proteins have lacked well-defined physiologic roles. However, considering an array of many, often unrelated, reports now permits a more coordinated perspective. Protein studies have elucidated basic SAA structure and fibril formation. Appreciating SAA’s lipophilicity helps relate it to lipid transport and metabolism as well as atherosclerosis. SAA’s function as a cytokine-like protein has become recognized in cell-cell communication as well as feedback in inflammatory, immunologic, neoplastic and protective pathways. SAA likely has a critical role in control and possibly propagation of the primordial acute phase response. Appreciating the many cellular and molecular interactions for SAA suggests possibilities for improved understanding of pathophysiology as well as treatment and disease prevention.
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Affiliation(s)
- George H Sack
- Departments of Biological Chemistry and Medicine, The Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Physiology 615, Baltimore, MD, 21205, USA.
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63
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Severe Sarcoidosis Phenotypes: An Occupational Hazard? Chest 2018; 150:263-5. [PMID: 27502975 DOI: 10.1016/j.chest.2016.02.663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 02/09/2016] [Indexed: 01/08/2023] Open
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64
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Novel T7 Phage Display Library Detects Classifiers for Active Mycobacterium Tuberculosis Infection. Viruses 2018; 10:v10070375. [PMID: 30029479 PMCID: PMC6070804 DOI: 10.3390/v10070375] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 07/09/2018] [Accepted: 07/17/2018] [Indexed: 12/18/2022] Open
Abstract
Tuberculosis (TB) is caused by Mycobacterium tuberculosis (MTB) and transmitted through inhalation of aerosolized droplets. Eighty-five percent of new TB cases occur in resource-limited countries in Asia and Africa and fewer than 40% of TB cases are diagnosed due to the lack of accurate and easy-to-use diagnostic assays. Currently, diagnosis relies on the demonstration of the bacterium in clinical specimens by serial sputum smear microscopy and culture. These methods lack sensitivity, are time consuming, expensive, and require trained personnel. An alternative approach is to develop an efficient immunoassay to detect antibodies reactive to MTB antigens in bodily fluids, such as serum. Sarcoidosis and TB have clinical and pathological similarities and sarcoidosis tissue has yielded MTB components. Using sarcoidosis tissue, we developed a T7 phage cDNA library and constructed a microarray platform. We immunoscreened our microarray platform with sera from healthy (n = 45), smear positive TB (n = 24), and sarcoidosis (n = 107) subjects. Using a student t-test, we identified 192 clones significantly differentially expressed between the three groups at a False Discovery Rate (FDR) <0.01. Among those clones, we selected the top ten most significant clones and validated them on independent test set. The area under receiver operating characteristics (ROC) for the top 10 significant clones was 1 with a sensitivity of 1 and a specificity of 1. Sequence analyses of informative phage inserts recognized as antigens by active TB sera may identify immunogenic antigens that could be used to develop therapeutic or prophylactic vaccines, as well as identify molecular targets for therapy.
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65
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Abstract
INTRODUCTION Treatment of sarcoidosis recommendations are often based on clinical experience and expert opinion. However, there are an increasing number of studies which are providing evidence to support decisions regarding treatment. Areas covered: Several studies have identified factors associated with increased risk for organ failure or death ('danger'). There have been several studies focused on the role of treatment to improve quality of life for the patient. Sarcoidosis treatment often follows a progression, based on response. Corticosteroids remain the initial treatment of choice for most patients. Second-line therapy includes cytotoxic agents. Immunosuppressives such as methotrexate, azathioprine, leflunomide, and mycophenolate have all been reported as effective in sarcoidosis. Biologics and other agents are third-line therapy. The monoclonal antibodies directed against tumor necrosis factor have been shown to be particularly effective for advanced disease. Infliximab has been the most studied drug in this class. Newer treatments, including repository corticotropin injection and rituximab have been reported as effective in some cases. Expert commentary: In this review, we use the GRADE system to evaluate the currently available evidence and make recommendations regarding treatment.
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Affiliation(s)
- W Ennis James
- a Division of Pulmonary and Critical Care , Medical University of South Carolina , Charleston , SC , USA
| | - Robert Baughman
- b Department of Medicine , University of Cincinnati Medical Center , Cincinnati , OH , USA
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66
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Abstract
INTRODUCTION In sarcoidosis, muscle involvement is common, but mostly asymptomatic. Currently, little is known about respiratory muscle and diaphragm involvement and function in patients with sarcoidosis. Reduced inspiratory muscle strength and/or a reduced diaphragm function may contribute to exertional dyspnea, fatigue and reduced health-related quality of life. Previous studies using volitional and non-volitional tests demonstrated a reduced inspiratory muscle strength in sarcoidosis compared to control subjects, and also showed that respiratory muscle function may even be significantly impaired in a subset of patients. Areas covered: This review examines the evidence on respiratory muscle involvement and its implications in sarcoidosis with emphasis on pathogenesis, diagnosis and treatment of respiratory muscle dysfunction. The presented evidence was identified by a literature search performed in PubMed and Medline for articles about respiratory and skeletal muscle function in sarcoidosis through to January 2018. Expert commentary: Respiratory muscle involvement in sarcoidosis is an underdiagnosed condition, which may have an important impact on dyspnea and health-related quality of life. Further studies are needed to understand the etiology, pathogenesis and extent of respiratory muscle involvement in sarcoidosis.
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Affiliation(s)
- Tina Schreiber
- a Department of Pneumology, Cologne Merheim Hospital, Kliniken der Stadt Köln gGmbH, Faculty of Health/School of Medicine , Witten/Herdecke University , Cologne , Germany
| | - Wolfram Windisch
- a Department of Pneumology, Cologne Merheim Hospital, Kliniken der Stadt Köln gGmbH, Faculty of Health/School of Medicine , Witten/Herdecke University , Cologne , Germany
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67
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A sarcoidosis clinician's perspective of MHC functional elements outside the antigen binding site. Hum Immunol 2018; 80:85-89. [PMID: 29859205 DOI: 10.1016/j.humimm.2018.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/29/2018] [Accepted: 05/29/2018] [Indexed: 01/05/2023]
Abstract
Sarcoidosis is a multisystem granulomatous disease of unknown cause. Evidence supports an integral role for interactions at the MHC binding site in the development of sarcoidosis. However, despite this evidence, there are clinical data that suggest that additional mechanisms are involved in the immunopathogenesis of this disease. This manuscript provides a brief clinical description of sarcoidosis, and a clinician's perspective of the immunopathogenesis of sarcoidosis in terms of the MHC binding site, MHC functional elements beyond the binding site, and other possible alternative mechanisms. Input from clinicians will be essential in establishing the immunologic cause of sarcoidosis as a detailed phenotypic characterization of disease will be required.
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68
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Chai Q, Zhang Y, Liu CH. Mycobacterium tuberculosis: An Adaptable Pathogen Associated With Multiple Human Diseases. Front Cell Infect Microbiol 2018; 8:158. [PMID: 29868514 PMCID: PMC5962710 DOI: 10.3389/fcimb.2018.00158] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 04/25/2018] [Indexed: 12/15/2022] Open
Abstract
Mycobacterium tuberculosis, the etiological agent of tuberculosis (TB), is an extremely successful pathogen that adapts to survive within the host. During the latency phase of infection, M. tuberculosis employs a range of effector proteins to be cloud the host immune system and shapes its lifestyle to reside in granulomas, sophisticated, and organized structures of immune cells that are established by the host in response to persistent infection. While normally being restrained in immunocompetent hosts, M. tuberculosis within granulomas can cause the recrudescence of TB when host immunity is compromised. Aside from causing TB, accumulating evidence suggests that M. tuberculosis is also associated with multiple other human diseases, such as pulmonary complications, autoimmune diseases, and metabolic syndromes. Furthermore, it has been recently appreciated that M. tuberculosis infection can also reciprocally interact with the human microbiome, which has a strong link to immune balance and health. In this review, we highlight the adaptive survival of M. tuberculosis within the host and provide an overview for regulatory mechanisms underlying interactions between M. tuberculosis infection and multiple important human diseases. A better understanding of how M. tuberculosis regulates the host immune system to cause TB and reciprocally regulates other human diseases is critical for developing rational treatments to better control TB and help alleviate its associated comorbidities.
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Affiliation(s)
- Qiyao Chai
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China
| | - Yong Zhang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China
| | - Cui Hua Liu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China
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69
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Th17-lineage cells in pulmonary sarcoidosis and Löfgren's syndrome: Friend or foe? J Autoimmun 2018; 87:82-96. [DOI: 10.1016/j.jaut.2017.12.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 12/12/2017] [Indexed: 01/17/2023]
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70
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Davoudi S, Chang VS, Navarro-Gomez D, Stanwyck LK, Sevgi DD, Papavasileiou E, Ren A, Uchiyama E, Sullivan L, Lobo AM, Papaliodis GN, Sobrin L. Association of genetic variants in RAB23 and ANXA11 with uveitis in sarcoidosis. Mol Vis 2018; 24:59-74. [PMID: 29416296 PMCID: PMC5783744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 01/19/2018] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Uveitis occurs in a subset of patients with sarcoidosis. The purpose of this study was to determine whether genetic variants that have been associated previously with overall sarcoidosis are associated with increased risk of developing uveitis. METHODS Seventy-seven subjects were enrolled, including 45 patients diagnosed with sarcoidosis-related uveitis as cases and 32 patients with systemic sarcoidosis without ocular involvement as controls. Thirty-eight single nucleotide polymorphisms (SNPs) previously associated with sarcoidosis, sarcoidosis severity, or other organ-specific sarcoidosis involvement were identified. Allele frequencies in ocular sarcoidosis cases versus controls were compared using the chi-square test, and p values were corrected for multiple hypotheses testing using permutation. All analyses were conducted with PLINK. RESULTS SNPs rs1040461 and rs61860052, in ras-related protein RAS23 (RAB23) and annexin A11 (ANXA11) genes, respectively, were associated with sarcoidosis-associated uveitis. The T allele of rs1040461 and the A allele of rs61860052 were found to be more prevalent in ocular sarcoidosis cases. These associations remained after correction for the multiple hypotheses tested (p=0.01 and p=0.02). In a subanalysis of Caucasian Americans only, two additional variants within the major histocompatibility complex (MHC) genes on chromosome 6, in HLA-DRB5 and HLA-DRB1, were associated with uveitis as well (p=0.009 and p=0.04). CONCLUSIONS Genetic variants in RAB23 and ANXA11 genes were associated with an increased risk of sarcoidosis-associated uveitis. These loci have previously been associated with overall sarcoidosis risk.
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Affiliation(s)
- Samaneh Davoudi
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Victoria S. Chang
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Daniel Navarro-Gomez
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Lynn K. Stanwyck
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Damla Duriye Sevgi
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Evangelia Papavasileiou
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Aiai Ren
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Eduardo Uchiyama
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Lynn Sullivan
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Ann-Marie Lobo
- Department of Ophthalmology, University of Illinois-Chicago, Chicago, IL
| | - George N. Papaliodis
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
| | - Lucia Sobrin
- Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA
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71
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Abstract
INTRODUCTION Sarcoidosis is a chronic granulomatous inflammatory disease that commonly causes lung disease, but can affect other vital organs and tissues. The cause of sarcoidosis is unknown, and current therapies are commonly limited by lack of efficacy, adverse side effects, and excessive cost. AREAS COVERED The manuscript will provide a review of current concepts relating to the pathogenesis of sarcoidosis, and how these disease mechanisms may be leveraged to develop more effective treatments for sarcoidosis. It provides only a brief summary of currently accepted therapy, while focusing more extensively on potential novel therapies. EXPERT OPINION Current sarcoidosis therapeutic agents primarily target the M1 or pro-inflammatory pathways. Agents that prevent M2 polarization, a regulatory phenotype favoring fibrosis, are attractive treatment alternatives that could potentially prevent fibrosis and associated life threatening complications. Effective treatment of sarcoidosis potentially requires simultaneous modulation both M1/M2 polarization instead of suppressing one pathway over the other to restore immune competent and inactive (M0) macrophages.
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Affiliation(s)
- Van Le
- a Department of Medicine , The Ohio State University Wexner Medical Center , Columbus , OH , USA
| | - Elliott D Crouser
- a Department of Medicine , The Ohio State University Wexner Medical Center , Columbus , OH , USA
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72
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The Pathogenesis of Pulmonary Sarcoidosis and Implications for Treatment. Chest 2017; 153:1432-1442. [PMID: 29224832 DOI: 10.1016/j.chest.2017.11.030] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 11/20/2017] [Accepted: 11/26/2017] [Indexed: 12/31/2022] Open
Abstract
Thoracic sarcoidosis is the most common form of sarcoidosis, encompassing a heterogeneous group of patients with a wide range of clinical features and associated outcomes. The distinction between isolated thoracic lymphadenopathy and pulmonary involvement matters. Morbidity is often higher, and long-term outcomes are worse for the latter. Although inflammatory infiltrates in pulmonary sarcoidosis may resolve, persistent disease activity is common and can result in lung fibrosis. Given the distinct clinical features and natural history of pulmonary sarcoidosis, its pathogenesis may differ in important ways from other sarcoidosis manifestations. This review highlights recent advances in the pathogenesis of pulmonary sarcoidosis, including the nature of the sarcoidosis antigen, the role of serum amyloid A and other host factors that contribute to alterations in innate immunity, factors that shape adaptive T-cell profiles in the lung, and how these mechanisms influence the maintenance of granulomatous inflammation in sarcoidosis. We discuss questions raised by recent findings, including the role of innate immunity in the pathogenesis, the meaning of immune cell exhaustion, and mechanisms that may contribute to lung fibrosis in sarcoidosis. We conclude with a reflection on when and how immunosuppressive therapies may be helpful for pulmonary sarcoidosis, a consideration of nonpharmacologic management strategies, and a survey of potential novel therapeutic targets for this vexing disease.
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73
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Moller DR, Rybicki BA, Hamzeh NY, Montgomery CG, Chen ES, Drake W, Fontenot AP. Genetic, Immunologic, and Environmental Basis of Sarcoidosis. Ann Am Thorac Soc 2017; 14:S429-S436. [PMID: 29073364 PMCID: PMC5822412 DOI: 10.1513/annalsats.201707-565ot] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/24/2017] [Indexed: 12/24/2022] Open
Abstract
Sarcoidosis is a multisystem disease with tremendous heterogeneity in disease manifestations, severity, and clinical course that varies among different ethnic and racial groups. To better understand this disease and to improve the outcomes of patients, a National Heart, Lung, and Blood Institute workshop was convened to assess the current state of knowledge, gaps, and research needs across the clinical, genetic, environmental, and immunologic arenas. We also explored to what extent the interplay of the genetic, environmental, and immunologic factors could explain the different phenotypes and outcomes of patients with sarcoidosis, including the chronic phenotypes that have the greatest healthcare burden. The potential use of current genetic, epigenetic, and immunologic tools along with study approaches that integrate environmental exposures and precise clinical phenotyping were also explored. Finally, we made expert panel-based consensus recommendations for research approaches and priorities to improve our understanding of the effect of these factors on the health outcomes in sarcoidosis.
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Affiliation(s)
- David R. Moller
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore Maryland
| | - Ben A. Rybicki
- Department of Public Health Sciences, Henry Ford Hospital, Detroit, Michigan
| | | | - Courtney G. Montgomery
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Edward S. Chen
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore Maryland
| | - Wonder Drake
- Vanderbilt University School of Medicine, Nashville, Tennessee; and
| | - Andrew P. Fontenot
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
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74
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Nagata K, Eishi Y, Uchida K, Yoneda K, Hatanaka H, Yasuhara T, Nagata M, Sotozono C, Kinoshita S. Immunohistochemical Detection of Propionibacterium acnes in the Retinal Granulomas in Patients with Ocular Sarcoidosis. Sci Rep 2017; 7:15226. [PMID: 29123243 PMCID: PMC5680245 DOI: 10.1038/s41598-017-15710-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 10/31/2017] [Indexed: 01/15/2023] Open
Abstract
The etiology of sarcoidosis is still obscure; however, Mycobacteria and Propionibacterium acnes are considered the most implicated etiological agent for sarcoidosis. To investigate whether P. acnes is an etiological agent for sarcoid uveitis, we analyzed the frequency of P. acnes detected within the biopsied retinas from patients with ocular sarcoidosis by immunohistochemistry with a P. acnes-specific monoclonal antibody (PAB antibody). Eleven patients (12 eyes) with sarcoid uveitis were enrolled in this study. Eight patients with rhegmatogenous retinal detachment, two patients with non-sarcoid uveitis, and two patients with vitreoretinal lymphoma were enrolled as controls. In the sarcoidosis group, granulomas were mainly observed in the inner retinal layer filled with CD4+ cells and CD68+ cells, indicating the Th1 immune response. P. acnes, identified as round bodies that reacted with the PAB antibody, were present in 10/12 samples (83%) from 9/11 patients (82%) with sarcoidosis. These round bodies were scattered within the retinal granulomas mainly in the inner retinal layer. In the control group, no round bodies were detected. Our results suggested that P. acnes could be associated with sarcoid uveitis. We hypothesize that sarcoid granulomas may be formed by a Th1 immune response to P. acnes hematogenously transmitted to the retina.
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Affiliation(s)
- Kenji Nagata
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan.
| | - Yoshinobu Eishi
- Department of Human Pathology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Keisuke Uchida
- Department of Human Pathology, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Kazuhito Yoneda
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan
| | - Hiroki Hatanaka
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan
| | - Toru Yasuhara
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan
| | - Maho Nagata
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan
| | - Chie Sotozono
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan
| | - Shigeru Kinoshita
- Department of frontier medical science and technology for ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Hirokoji-agaru, Kawaramachi-dori, Kamigyo-ku, Kyoto, 602-0841, Japan
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Crouser ED, White P, Caceres EG, Julian MW, Papp AC, Locke LW, Sadee W, Schlesinger LS. A Novel In Vitro Human Granuloma Model of Sarcoidosis and Latent Tuberculosis Infection. Am J Respir Cell Mol Biol 2017; 57:487-498. [PMID: 28598206 DOI: 10.1165/rcmb.2016-0321oc] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Many aspects of pathogenic granuloma formation are poorly understood, requiring new relevant laboratory models that represent the complexity (genetics and diversity) of human disease. To address this need, we developed an in vitro model of granuloma formation using human peripheral blood mononuclear cells (PBMCs) derived from patients with active sarcoidosis, latent tuberculosis (TB) infection (LTBI), or normal healthy control subjects. PBMCs were incubated for 7 days with uncoated polystyrene beads or beads coated with purified protein derivative (PPD) or human serum albumin. In response to PPD-coated beads, PBMCs from donors with sarcoidosis and LTBI formed robust multicellular aggregates resembling granulomas, displaying a typical T-helper cell type 1 immune response, as assessed by cytokine analyses. In contrast, minimal PBMC aggregation occurred when control PBMCs were incubated with PPD-coated beads, whereas the response to uncoated beads was negligible in all groups. Sarcoidosis PBMCs responded to human serum albumin-coated beads with modest cellular aggregation and inflammatory cytokine release. Whereas the granuloma-like aggregates formed in response to PPD-coated beads were similar for sarcoidosis and LTBI, molecular profiles differed significantly. mRNA expression patterns revealed distinct pathways engaged in early granuloma formation in sarcoidosis and LTBI, and they resemble molecular patterns reported in diseased human tissues. This novel in vitro human granuloma model is proposed as a tool to investigate mechanisms of early granuloma formation and for preclinical drug discovery research of human granulomatous disorders. Clinical trial registered with www.clinicaltrials.gov (NCT01857401).
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Affiliation(s)
- Elliott D Crouser
- 1 Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, the Dorothy M. Davis Heart and Lung Research Institute, the Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Peter White
- 2 Center for Microbial Pathogenesis, the Research Institute at Nationwide Children's Hospital, Columbus, Ohio; and
| | - Evelyn Guirado Caceres
- 3 Department of Microbial Infection and Immunity, Center for Microbial Interface Biology, and
| | - Mark W Julian
- 1 Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, the Dorothy M. Davis Heart and Lung Research Institute, the Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Audrey C Papp
- 4 Department of Cancer Biology and Genetics, the Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Landon W Locke
- 3 Department of Microbial Infection and Immunity, Center for Microbial Interface Biology, and
| | - Wolfgang Sadee
- 4 Department of Cancer Biology and Genetics, the Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Larry S Schlesinger
- 3 Department of Microbial Infection and Immunity, Center for Microbial Interface Biology, and
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Rotsinger JE, Celada LJ, Polosukhin VV, Atkinson JB, Drake WP. Molecular Analysis of Sarcoidosis Granulomas Reveals Antimicrobial Targets. Am J Respir Cell Mol Biol 2017; 55:128-34. [PMID: 26807608 DOI: 10.1165/rcmb.2015-0212oc] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Sarcoidosis is a granulomatous disease of unknown cause. Prior molecular and immunologic studies have confirmed the presence of mycobacterial virulence factors, such as catalase peroxidase and superoxide dismutase A, within sarcoidosis granulomas. Molecular analysis of granulomas can identify targets of known antibiotics classes. Currently, major antibiotics are directed against DNA synthesis, protein synthesis, and cell wall formation. We conducted molecular analysis of 40 sarcoidosis diagnostic specimens and compared them with 33 disease control specimens for the presence of mycobacterial genes that encode antibiotic targets. We assessed for genes involved in DNA synthesis (DNA gyrase A [gyrA] and DNA gyrase B), protein synthesis (RNA polymerase subunit β), cell wall synthesis (embCAB operon and enoyl reductase), and catalase peroxidase. Immunohistochemical analysis was conducted to investigate the locale of mycobacterial genes such as gyrA within 12 sarcoidosis specimens and 12 disease controls. Mycobacterial DNA was detected in 33 of 39 sarcoidosis specimens by quantitative real-time polymerase chain reaction compared with 2 of 30 disease control specimens (P < 0.001, two-tailed Fisher's test). Twenty of 39 were positive for three or more mycobacterial genes, compared with 1 of 30 control specimens (P < 0.001, two-tailed Fisher's test). Immunohistochemistry analysis localized mycobacterial gyrA nucleic acids to sites of granuloma formation in 9 of 12 sarcoidosis specimens compared with 1 of 12 disease controls (P < 0.01). Microbial genes encoding enzymes that can be targeted by currently available antimycobacterial antibiotics are present in sarcoidosis specimens and localize to sites of granulomatous inflammation. Use of antimicrobials directed against target enzymes may be an innovative treatment alternative.
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Affiliation(s)
| | | | | | - James B Atkinson
- 3 Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Wonder P Drake
- 1 Divisions of Infectious Diseases and.,3 Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
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Schnerch J, Prasse A, Vlachakis D, Schuchardt KL, Pechkovsky DV, Goldmann T, Gaede KI, Müller-Quernheim J, Zissel G. Functional Toll-Like Receptor 9 Expression and CXCR3 Ligand Release in Pulmonary Sarcoidosis. Am J Respir Cell Mol Biol 2017; 55:749-757. [PMID: 27390897 DOI: 10.1165/rcmb.2015-0278oc] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Sarcoidosis is a granulomatous disease characterized by a T-helper type 1 (Th1) cell-dominated alveolitis. As a role of bacteria in the pathogenesis of sarcoidosis has been discussed, Toll-like receptors (TLRs) may be involved in the initiation of a first immune reaction. We analyzed expression and functional relevance of several TLRs in bronchoalveolar lavage (BAL) cells from patients with pulmonary sarcoidosis. In parallel, we determined the release of C-X-C motif chemokine 9 (CXCL9), CXCL10, and CXCL11 by BAL cells from patients with pulmonary sarcoidosis. Nucleotide-binding oligomerization domain-containing protein (NOD) 1 and 2, TLR2, TLR6, and TLR9 expression by BAL cells was analyzed by real-time RT-PCR and cell surface expression by flow cytometry. Chemokine release was measured in BAL cell culture supernatants by ELISA. We found increased TLR9 mRNA expression in patients with sarcoidosis with chest X-ray type I and II and TLR9 protein expression in BAL cells from patients with chest X-ray type II and III. Stimulation with CpG nucleotides increased CXCL10 release by BAL cells from patients with sarcoidosis type II significantly compared with control subjects or other patients with sarcoidosis. In contrast, no increase in TNF, IL-12p40, or CXCL8 was detected. Spontaneous release of CXCL10, but not CXCL9 or CXCL11, by cultured BAL cells was also highest in cells from patients with chest X-ray type II. We found a significant association between TLR9 expression and CD4+ lymphocytes in BAL. Our data demonstrate that TLR9 ligands may contribute to the immunopathogenesis of sarcoidosis via induction of CXCL10 release in the alveolar macrophages.
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Affiliation(s)
- Jasmin Schnerch
- 1 Department of Pneumology, Centre for Medicine, Medical Centre-University of Freiburg, Freiburg, Germany
| | - Antje Prasse
- 1 Department of Pneumology, Centre for Medicine, Medical Centre-University of Freiburg, Freiburg, Germany
| | - Dimitrios Vlachakis
- 1 Department of Pneumology, Centre for Medicine, Medical Centre-University of Freiburg, Freiburg, Germany
| | - Kathrin L Schuchardt
- 1 Department of Pneumology, Centre for Medicine, Medical Centre-University of Freiburg, Freiburg, Germany
| | - Dmitri V Pechkovsky
- 2 Respiratory Division, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Torsten Goldmann
- 3 Clinical and Experimental Pathology, Division of Clinical Medicine, Research Centre Borstel, Borstel, Germany.,4 Airway Research Center North (ARCN), Member of the German Center for Lung Research, Borstel, Germany; and
| | - Karoline I Gaede
- 4 Airway Research Center North (ARCN), Member of the German Center for Lung Research, Borstel, Germany; and.,5 BioMaterialBank North, Division of Clinical Medicine, Research Centre Borstel, Borstel, Germany
| | - Joachim Müller-Quernheim
- 1 Department of Pneumology, Centre for Medicine, Medical Centre-University of Freiburg, Freiburg, Germany
| | - Gernot Zissel
- 1 Department of Pneumology, Centre for Medicine, Medical Centre-University of Freiburg, Freiburg, Germany
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Celada LJ, Rotsinger JE, Young A, Shaginurova G, Shelton D, Hawkins C, Drake WP. Programmed Death-1 Inhibition of Phosphatidylinositol 3-Kinase/AKT/Mechanistic Target of Rapamycin Signaling Impairs Sarcoidosis CD4 + T Cell Proliferation. Am J Respir Cell Mol Biol 2017; 56:74-82. [PMID: 27564547 DOI: 10.1165/rcmb.2016-0037oc] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Patients with progressive sarcoidosis exhibit increased expression of programmed death-1 (PD-1) receptor on their CD4+ T cells. Up-regulation of this marker of T cell exhaustion is associated with a reduction in the proliferative response to T cell receptor (TCR) stimulation, a defect that is reversed by PD-1 pathway blockade. Genome-wide association studies and microarray analyses have correlated signaling downstream from the TCR with sarcoidosis disease severity, but the mechanism is not yet known. Reduced phosphatidylinositol 3-kinase (PI3K)/AKT expression inhibits proliferation by inhibiting cell cycle progression. To test the hypothesis that PD-1 expression attenuates TCR-dependent activation of PI3K/AKT activity in progressive systemic sarcoidosis, we analyzed PI3K/AKT/mechanistic target of rapamycin (mTOR) expression at baseline and after PD-1 pathway blockade in CD4+ T cells isolated from patients with sarcoidosis and healthy control subjects. We confirmed an increased percentage of PD-1+ CD4+ T cells and reduced proliferative capacity in patients with sarcoidosis compared with healthy control subjects (P < 0.001). There was a negative correlation with PD-1 expression and proliferative capacity (r = -0.70, P < 0.001). Expression of key mediators of cell cycle progression, including PI3K and AKT, were significantly decreased. Gene and protein expression levels reverted to healthy control levels after PD-1 pathway blockade. Reduction in sarcoidosis CD4+ T cell proliferative capacity is secondary to altered expression of key mediators of cell cycle progression, including the PI3K/AKT/mTOR pathway, via PD-1 up-regulation. This supports the concept that PD-1 up-regulation drives the immunologic deficits associated with sarcoidosis severity by inducing signaling aberrancies in key mediators of cell cycle progression.
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Affiliation(s)
- Lindsay J Celada
- 1 Division of Infectious Diseases, Department of Medicine, and.,2 Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | - Anjuli Young
- 1 Division of Infectious Diseases, Department of Medicine, and
| | - Guzel Shaginurova
- 2 Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | | | - Wonder P Drake
- 1 Division of Infectious Diseases, Department of Medicine, and.,2 Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
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79
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Wahlund CJE, Eklund A, Grunewald J, Gabrielsson S. Pulmonary Extracellular Vesicles as Mediators of Local and Systemic Inflammation. Front Cell Dev Biol 2017; 5:39. [PMID: 28491866 PMCID: PMC5405144 DOI: 10.3389/fcell.2017.00039] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 03/30/2017] [Indexed: 12/31/2022] Open
Abstract
Cells of the airways are constantly exposed to environmental hazards including cigarette smoke, irritants, pathogens, and mechanical insults. Maintaining barrier integrity is vital, and mounting responses to threats depends on intercellular communication. Extracellular vesicles (EVs), including exosomes and microvesicles, are major signal mediators between cells, shuttling cargo in health and disease. Depending on the state of the originating cells, EVs are capable of inducing proinflammatory effects including antigen presentation, cellular migration, apoptosis induction, and inflammatory cytokine release. Cells of the airways release EVs, which can be found in bronchoalveolar lavage fluid. EVs of the airways can support inflammation in the lung, but may also exit into the circulation and carry a cocktail of pro-inflammatory molecules to recipient cells in distant organs. In this review, we discuss the possibility that EVs originating from the airways contribute to dissemination of inflammation in both lung disorders and systemic inflammatory conditions.
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Affiliation(s)
- Casper J E Wahlund
- Unit of Immunology and Allergy, Department of Medicine, Karolinska InstituteStockholm, Sweden
| | - Anders Eklund
- Respiratory Unit, Department of Medicine, Karolinska Institute and Karolinska University HospitalStockholm, Sweden
| | - Johan Grunewald
- Respiratory Unit, Department of Medicine, Karolinska Institute and Karolinska University HospitalStockholm, Sweden
| | - Susanne Gabrielsson
- Unit of Immunology and Allergy, Department of Medicine, Karolinska InstituteStockholm, Sweden
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80
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Asai J. What is new in the histogenesis of granulomatous skin diseases? J Dermatol 2017; 44:297-303. [PMID: 28256762 DOI: 10.1111/1346-8138.13662] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 01/11/2023]
Abstract
A granuloma is a form of inflammation, which predominantly consists of macrophages. It typically develops when the immune system attempts to enclose substances that are usually insoluble and cannot be eliminated to prevent the spread of these substances to the other body compartments. According to the source of the substances, granulomatous diseases can be divided into two groups: infectious and non-infectious. The mechanisms of infectious granuloma formation have been widely investigated because of its easy reproducibility in experimental models, both in vivo and in vitro. On the contrary, mechanisms of non-infectious granuloma formation have not been well investigated because of the difficulty to reproduce this formation in experimental models. In this article, we review our recent understanding of the histogenesis and pathogenesis of granuloma formation, confirmed from studies of infectious granulomas, and we present potential hypotheses of the histogenesis and pathogenesis of non-infectious granulomas based on clinical investigations.
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Affiliation(s)
- Jun Asai
- Department of Dermatology, Kyoto prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
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81
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Ferrara G, Valentini D, Rao M, Wahlström J, Grunewald J, Larsson LO, Brighenti S, Dodoo E, Zumla A, Maeurer M. Humoral immune profiling of mycobacterial antigen recognition in sarcoidosis and Löfgren's syndrome using high-content peptide microarrays. Int J Infect Dis 2017; 56:167-175. [PMID: 28159576 DOI: 10.1016/j.ijid.2017.01.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 01/20/2017] [Indexed: 12/26/2022] Open
Abstract
INTRODUCTION Sarcoidosis is considered an idiopathic granulomatous disease, although similar immunological and clinical features with tuberculosis (TB) suggest mycobacterial involvement in its pathogenesis. High-content peptide microarrays (HCPM) may help to decipher mycobacteria-specific antibody reactivity in sarcoidosis. METHODS Serum samples from patients with sarcoidosis, Löfgren's syndrome, and TB, as well as from healthy individuals (12/group), were tested on HCPM containing 5964 individual peptides spanning 154 Mycobacterium tuberculosis proteins displayed as 15-amino acid stretches. Inclusion/exclusion and significance analyses were performed according to published methods. RESULTS Each study group recognized 68-78% M. tuberculosis peptides at least once. M. tuberculosis epitope recognition by sarcoidosis patient sera was 42.7%, and by TB patient sera was 39.1%. Seven and 16 peptides were recognized in 9/12 (75%) and 8/12 (67%) sarcoidosis patient sera but not in TB patient sera, respectively. Nine (75%) and eight (67%) out of twelve TB patient sera, respectively recognized M. tuberculosis peptides that were not recognized in sarcoidosis patient sera. CONCLUSIONS Specific IgG recognition patterns for M. tuberculosis antigens in sarcoidosis patients re-affirm mycobacterial involvement in sarcoidosis, providing biologically relevant targets for future studies pertaining to diagnostics and immunotherapy.
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Affiliation(s)
- Giovanni Ferrara
- Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of Respiratory Medicine and Allergy, Karolinska University Hospital, Solna, Sweden
| | - Davide Valentini
- Centre for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital, Huddinge, Sweden; Division of Therapeutic Immunology (TIM), Department of Laboratory Medicine (LABMED), Karolinska Institutet, Huddinge 14186, Stockholm, Sweden
| | - Martin Rao
- Centre for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital, Huddinge, Sweden; Division of Therapeutic Immunology (TIM), Department of Laboratory Medicine (LABMED), Karolinska Institutet, Huddinge 14186, Stockholm, Sweden
| | - Jan Wahlström
- Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Johan Grunewald
- Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of Respiratory Medicine and Allergy, Karolinska University Hospital, Solna, Sweden
| | | | - Susanna Brighenti
- Centre for Infectious Medicine (CIM), Department of Medicine (MedH), Karolinska Institutet, Stockholm, Sweden
| | - Ernest Dodoo
- Division of Therapeutic Immunology (TIM), Department of Laboratory Medicine (LABMED), Karolinska Institutet, Huddinge 14186, Stockholm, Sweden
| | - Alimuddin Zumla
- Centre for Clinical Microbiology, Division of Infection and Immunity, University College London, and NIHR Biomedical Research Centre, UCL Hospitals NHS Foundation Trust, London, UK
| | - Markus Maeurer
- Centre for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital, Huddinge, Sweden; Division of Therapeutic Immunology (TIM), Department of Laboratory Medicine (LABMED), Karolinska Institutet, Huddinge 14186, Stockholm, Sweden.
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Proteomic Analysis of Kveim Reagent Identifies Targets of Cellular Immunity in Sarcoidosis. PLoS One 2017; 12:e0170285. [PMID: 28114394 PMCID: PMC5256960 DOI: 10.1371/journal.pone.0170285] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 01/03/2017] [Indexed: 02/07/2023] Open
Abstract
Background Kveim-reagent (Kv) skin testing was a historical method of diagnosing sarcoidosis. Intradermal injection of treated sarcoidosis spleen tissue resulted in a granuloma response at injection site by 4–6 weeks. Previous work indicates proteins as the possible trigger of this reaction. We aimed to identify Kv-specific proteins and characterise the ex vivo response of Peripheral Blood Mononuclear Cells (PBMCs) from sarcoidosis, tuberculosis and healthy control patients when stimulated with both Kv and selected Kv-specific proteins. Methods Kv extracts were separated by 1D-SDS-PAGE and 2D-DIGE and then underwent mass spectrometric analysis for protein identification. Sarcoidosis and control PBMCs were first stimulated with Kv and then with three selected recombinant protein candidates which were identified from the proteomic analysis. PBMC secreted cytokines were subsequently measured by Multiplex Cytokine Assay. Results We observed significantly increased IFN-γ and TNF-α secretion from Kv-stimulated PBMCs of sarcoidosis patients vs. PBMCs from healthy volunteers (IFN-γ: 207.2 pg/mL vs. 3.86 pg/mL, p = 0.0018; TNF-α: 2375 pg/mL vs. 42.82 pg/mL, p = 0.0003). Through proteomic approaches we then identified 74 sarcoidosis tissue-specific proteins. Of these, 3 proteins (vimentin, tubulin and alpha-actinin-4) were identified using both 1D-SDS-PAGE and 2D-DIGE. Data are available via ProteomeXchange with identifier PXD005150. Increased cytokine secretion was subsequently observed with vimentin stimulation of sarcoidosis PBMCs vs. tuberculosis PBMCs (IFN-γ: 396.6 pg/mL vs 0.1 pg/mL, p = 0.0009; TNF-α: 1139 pg/mL vs 0.1 pg/mL, p<0.0001). This finding was also observed in vimentin stimulation of sarcoidosis PBMCs compared to PBMCs from healthy controls (IFN-γ: 396.6 pg/mL vs. 0.1 pg/mL, p = 0.014; TNF-α: 1139 pg/mL vs 42.29 pg/mL, p = 0.027). No difference was found in cytokine secretion between sarcoidosis and control PBMCs when stimulated with either tubulin or alpha-actinin-4. Conclusions Stimulation with both Kveim reagent and vimentin induces a specific pro-inflammatory cytokine secretion from sarcoidosis PBMCs. Further investigation of cellular immune responses to Kveim-specific proteins may identify novel biomarkers to assist the diagnosis of sarcoidosis.
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83
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Mortaz E, Adcock IM, Abedini A, Kiani A, Kazempour-Dizaji M, Movassaghi M, Garssen J. The role of pattern recognition receptors in lung sarcoidosis. Eur J Pharmacol 2017; 808:44-48. [PMID: 28108375 DOI: 10.1016/j.ejphar.2017.01.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 01/15/2017] [Accepted: 01/16/2017] [Indexed: 12/21/2022]
Abstract
Sarcoidosis is a granulomatous disorder of unknown etiology. Infection, genetic factors, autoimmunity and an aberrant innate immune system have been explored as potential causes of sarcoidosis. The etiology of sarcoidosis remains unknown, and it is thought that it might be caused by an infectious agent in a genetically predisposed, susceptible host. Inflammation results from recognition of evolutionarily conserved structures of pathogens (Pathogen-associated molecular patterns, PAMPs) and/or from reaction to tissue damage associated patterns (DAMPs) through recognition by a limited number of germ line-encoded pattern recognition receptors (PRRs). Due to the similar clinical and histopathological picture of sarcoidosis and tuberculosis, Mycobacterium tuberculosis antigens such early secreted antigen (ESAT-6), heat shock proteins (Mtb-HSP), catalase-peroxidase (katG) enzyme and superoxide dismutase A peptide (sodA) have been often considered as factors in the etiopathogenesis of sarcoidosis. Potential non-TB-associated PAMPs include lipopolysaccharide (LPS) from the outer membrane of Gram-negative bacteria, peptidoglycan, lipoteichoic acid, bacterial DNA, viral DNA/RNA, chitin, flagellin, leucine-rich repeats (LRR), mannans in the yeast cell wall, and microbial HSPs. Furthermore, exogenous non-organic antigens such as metals, silica, pigments with/without aluminum in tattoos, pesticides, and pollen have been evoked as potential causes of sarcoidosis. Exposure of the airways to diverse infectious and non-infectious agents may be important in the pathogenesis of sarcoidosis. The current review provides and update on the role of PPRs and DAMPs in the pathogenesis of sarcoidsis.
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Affiliation(s)
- Esmaeil Mortaz
- Department of Immunology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ian M Adcock
- Airways Disease Section, National Heart and Lung Institute, Imperial College London, London, UK
| | - Atefhe Abedini
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arda Kiani
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mehdi Kazempour-Dizaji
- Mycobacteriology Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masoud Movassaghi
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles (UCLA), USA
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Sciences, Utrecht University, Utrecht, The Netherlands; Nutricia Research Centre for Specialized Nutrition, Utrecht, The Netherlands
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Abstract
The lung is constantly exposed to airborne infectious agents due to the large surface area of approximately 100 m2. Therefore pneumonia is one of the most common lung diseases. Understanding infection requires understanding the routes of infections, the way invading organisms infect epithelial cells, as well as defense mechanisms of the lung tissue acquired during evolution. Different variants of infectious and non-infectious pneumonias are discussed; special types of pneumonias such as granulomatous and fibrosing pneumonias are presented under separate sections. Causing organisms and other causes of pneumonias are included, and their mode of action is included as far as understood.
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85
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Is there any association between Sarcoidosis and infectious agents?: a systematic review and meta-analysis. BMC Pulm Med 2016; 16:165. [PMID: 27894280 PMCID: PMC5126827 DOI: 10.1186/s12890-016-0332-z] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 11/22/2016] [Indexed: 11/29/2022] Open
Abstract
Background During the last few years, investigators have debated the role that infectious agents may have in sarcoidosis pathogenesis. With the emergence of new molecular biology techniques, several studies have been conducted; therefore, we performed a meta-analysis in order to better explain this possible association. Methods This review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement from the Cochrane collaboration guidelines. Four different databases (Medline, Scopus, Web of Science, and Cochrane Collaboration) were searched for all original articles published from 1980 to 2015. The present meta-analysis included case–control studies that reported the presence of microorganisms in samples of patients with sarcoidosis using culture methods or molecular biology techniques. We used a random effects or a fixed-effect model to calculate the odds ratio (OR) and 95% confidence intervals (CI). Sensitivity and subgroup analyses were performed in order to explore the heterogeneity among studies. Results Fifty-eight studies qualified for the purpose of this analysis. The present meta-analysis, the first, to our knowledge, in evaluation of all infectious agents proposed to be associated with sarcoidosis and involving more than 6000 patients in several countries, suggests an etiological link between Propionibacterium acnes and sarcoidosis, with an OR of 18.80 (95% CI 12.62, 28.01). We also found a significant association between sarcoidosis and mycobacteria, with an OR of 6.8 (95% CI 3.73, 12.39). Borrelia (OR 4.82; 95% CI 0.98, 23.81), HHV-8 (OR 1.47; 95% CI 0.02, 110.06) as well as Rickettsia helvetica, Chlamydia pneumoniae, Epstein-barr virus and Retrovirus, although suggested by previous investigations, were not associated with sarcoidosis. Conclusion This meta-analysis suggests that some infectious agents can be associated with sarcoidosis. What seems clear is that more than one infectious agent might be implicated in the pathogenesis of sarcoidosis; probably the patient’s geographical location might dictate which microorganisms are more involved. Future investigations and more clinical trials are need to bring these evidences to a more global level. Electronic supplementary material The online version of this article (doi:10.1186/s12890-016-0332-z) contains supplementary material, which is available to authorized users.
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Abstract
Sarcoidosis is a multisystem disease characterized by the presence of noncaseating granulomas, the exact etiology of which is yet to be determined. Pulmonary involvement occurs in the majority of patients and its severity ranges from asymptomatic involvement of mediastinal lymph nodes to progressive pulmonary fibrosis and chronic respiratory failure that is insensitive to treatment. Diagnosis of pulmonary sarcoidosis requires a compatible clinical picture supported by radiologic and pathologic data. A recent development in establishing the diagnosis of pulmonary sarcoidosis is endobronchial ultrasound that increases the yield of transbronchial needle aspiration of hilar and/or mediastinal lymph nodes. Fluorodeoxyglucose positron emission tomography (FDG-PET) is highly sensitive in detecting occult sites of disease and is of value in guiding biopsies of these sites. A combined imaging modality using both FDG-PET and CT scan is more sensitive than PET alone and is now the standard of care in patients requiring biopsies of active lesions. Biologic agents like anti-tumor necrosis factor antibodies are being used as second line treatment in those patients dependent on steroids or in cases of refractory sarcoidosis. Lung transplantation is the final option in suitable patients with end-stage pulmonary sarcoidosis.
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Affiliation(s)
- Vidya Ramachandraiah
- a Division of Pulmonary , New York Medical College, Critical Care & Sleep Medicine , Valhalla , New York , USA
| | - Wilbert Aronow
- b Cardiology Division , New York Medical College, New York Medical College Macy Pavilion , Valhalla , NY , USA
| | - Dipak Chandy
- c Division of Pulmonary , New York Medical College Medicine, Critical Care & Sleep Medicine , Valhalla , NY , USA
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JAVADI A, SHAMAEI M, ZAREI M, REZAEIAN L, KIANI A, ABEDINI A. Insertion/Deletion Polymorphisms and Serum Angiotensin-converting Enzyme Levels in Iranian Patients with Sarcoidosis. IRANIAN JOURNAL OF PUBLIC HEALTH 2016; 45:1473-1480. [PMID: 28032065 PMCID: PMC5182256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Accepted: 07/25/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND Sarcoidosis is a multisystem inflammatory disease of unknown origin with characterization of small granulomas. Angiotensin-converting enzyme (ACE) is a pathophysiologic marker of sarcoidosis. We present the ACE insertion/deletion (I/D) polymorphism in correlation with serum ACE level in Iranian patients with sarcoidosis. METHODS From Jan 2014 to Jan 2015, 102 Iranian patients who histopathologically diagnosed for sarcoidosis and 192 healthy age and sex-matched controls were recruited. PCR was used for detection of I/D polymorphism in ACE gene. RESULTS Frequency of II/ID/DD genotype in sarcoidosis disease was 17%, 35.5%, and 47.1%, respectively. The frequency of D allele was 0.65. A significant association between I/D genotypes and mean of sACE level was seen (DD=85.2±22.9, P<0.001). More frequent genotype in sarcoidosis patients was DD (47%), ID genotype (45.9%) was found more in controls. Logistic regression analysis adjusting age and sex showed that ID to II (OR=0.35, 95%CI=0.17-0.73, P=0.005) and DD to II (OR=2.11, 95%CI=0.98-4.54, P=0.05) could be considered as a predictor factor for the disease activity. No significant model for men in sarcoidosis group was seen, while women with II/ID were associated with a reduced risk for the disease. CONCLUSION Although more regional studies with appropriate statistical scale must be done to provide a better diagnosis and prognostic tool for this disease, this study demonstrates that ID and DD genotype could be predictive factors for sarcoidosis.
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Affiliation(s)
- Alireza JAVADI
- Mycobacteriology Research Center, National Research Institute of Tuberculosis and Lung Diseases, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masoud SHAMAEI
- Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masoud ZAREI
- Genetic Research Center, Molecular and Cellular Department, Ashkzar Azad University, Yazd, Iran
| | - Lida REZAEIAN
- Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arda KIANI
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atefeh ABEDINI
- Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Margaritopoulos GA, Lasithiotaki I, Antoniou KM. Toll-like receptors and autophagy in interstitial lung diseases. Eur J Pharmacol 2016; 808:28-34. [PMID: 27687957 DOI: 10.1016/j.ejphar.2016.09.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 03/28/2016] [Accepted: 09/23/2016] [Indexed: 02/06/2023]
Abstract
Interstitial lung diseases (ILDs) include a number of diseases whose pathogenesis still is not fully understood. Idiopathic pulmonary fibrosis (IPF), the most frequent and severe form of ILDs is an epithelial-driven disease and the treatment consists of the use of antifibrotic agents. In the rest of ILDs an inflammation-driven pathway is believed to be the main pathogenetic mechanism and treatment consists of the use of immunomodulatory agents. In both groups it is believed that infection can play an important role in the development and progression of the diseases. The immune system can recognize exogenous threats or endogenous stress through specialized receptors namely pattern recognition receptors (PRRs) which in turn, initiate downstream signaling pathways to control immune responses. Recently, a link between PRRs and autophagy, a specialized biological process involved in maintaining cellular homeostasis but also involved in various immunologic processes, has been described. In this review, we focus on the reciprocal influences of PRRs with particular emphasis on Toll-like receptors and autophagy in modulating innate immune responses.
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Affiliation(s)
| | - Ismini Lasithiotaki
- Laboratory of Cellular and Molecular Pneumonology, Medical School, University of Crete, Heraklion 71110, Greece
| | - Katerina M Antoniou
- Laboratory of Cellular and Molecular Pneumonology, Medical School, University of Crete, Heraklion 71110, Greece
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Zissel G, Müller-Quernheim J. Specific antigen(s) in sarcoidosis: a link to autoimmunity? Eur Respir J 2016; 47:707-9. [PMID: 26929312 DOI: 10.1183/13993003.01791-2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Gernot Zissel
- Medical Center - University of Freiburg, Center for Medicine, Dept of Pneumology, Freiburg, Germany
| | - Joachim Müller-Quernheim
- Medical Center - University of Freiburg, Center for Medicine, Dept of Pneumology, Freiburg, Germany
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Martusewicz-Boros MM, Boros PW, Wiatr E, Zych J, Piotrowska-Kownacka D, Roszkowski-Śliż K. Prevalence of cardiac sarcoidosis in white population: a case-control study: Proposal for a novel risk index based on commonly available tests. Medicine (Baltimore) 2016; 95:e4518. [PMID: 27512871 PMCID: PMC4985326 DOI: 10.1097/md.0000000000004518] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cardiac sarcoidosis (CS) is a life-threatening and underdiagnosed manifestation of the disease, which requires a complicated and expensive diagnostic pathway. There is a need for simple tool for practitioners to determine the risk of CS without access to specialized equipment.The aim of study was to determine the prevalence of CS in a group of patients diagnosed with or followed up because of sarcoidosis. A secondary objective was the search for factors associated with heart involvement.We performed a prospective case-control study (screening analysis) in consecutive sarcoidosis patients collected from October 2012 to September 2015. Cardiac magnetic resonance (CMR) imaging was performed to confirm or exclude cardiac involvement in all patients. The study was conducted in a hospital-based referral center for patients with sarcoidosis and other interstitial lung diseases.Analysis was performed in a group of 201 patients (all white) with biopsy-proven sarcoidosis, mean age 41.4 ± 10.2, 121 of them (60.2%) males. Four patients with previously recognized cardiac diseases, which make CMR imaging for CS inconclusive, were not included.Cardiac involvement was detected by CMR in 49 patients (24.4%). Factors associated with an increased risk of CS (univariate analyses) included male sex (odds ratio [OR]: 2.5; 1.21-5.16, P = 0.01), cardiac-related symptoms (OR: 3.53; 1.81-6.89, P = 0.0002), extrathoracic sarcoidosis (OR: 3.48; 1.77-6.84, P = 0.0003), elevated serum NT-proBNP (OR: 3.82; 1.55-9.42, P = 0.004), any electrocardiography abnormality (OR: 5.38; 2.48-11.67, P = 0.0001), and contemporary radiological progression sarcoidosis in the lungs (OR: 2.98; 1.52-5.84, P = 0.001). Abnormalities in echocardiography and Holter ECG were also risk factors, but not significant in multivariate analyses. A CS Risk Index was developed using a multivariate model to predict CS, achieving an accuracy of 82%, sensitivity of 50%, specificity of 94%, and likelihood ratio 8.1.CS was detected in one fourth of patients. A CS Risk Index based on the results of easily accessible tests is cost-effective and may help to identify patients who should be urgently referred for further diagnostic procedures.
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Affiliation(s)
| | - Piotr W. Boros
- Lung Pathophysiology Department, National TB & Lung Diseases Research Institute
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Fang C, Huang H, Xu Z. Immunological Evidence for the Role of Mycobacteria in Sarcoidosis: A Meta-Analysis. PLoS One 2016; 11:e0154716. [PMID: 27479700 PMCID: PMC4968811 DOI: 10.1371/journal.pone.0154716] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/18/2016] [Indexed: 12/11/2022] Open
Abstract
Background Sarcoidosis is a granulomatous disease, the etiology of which is currently unknown. The role of mycobacteria in the etiology of sarcoidosis has been extensively investigated. In this meta-analysis, we assessed the immunological evidence of the possible role of mycobacteria in the pathogenesis and development of sarcoidosis. Methods We performed a systematic search of relevant articles from PubMed, Embase and Cochrane Library databases published between January 1990 and October 2015. Data extracted from the articles were analyzed with Review Manager 5.3 (Cochrane Collaboration, Oxford, UK). Results In this meta-analysis, 13 case-control studies (733 participants) were considered eligible according to our criteria. Methodological quality was assessed using the Newcastle-Ottawa Scale (NOS). The positivity incidence of the immune response (either the cell-mediated response or humoral response) in sarcoidosis patients was significantly higher than that in controls, as determined using fixed-effects model. The odds ratio (OR) of the positivity incidence of T-cell response in the patients with sarcoidosis versus the controls with PPD- or unknown PPD status was 5.54 (95% CI 3.56–8.61); the ORs were 16.70 (95% CI 8.19–34.08) and 1.48 (95% CI 0.74–2.96) for the two subgroups with PPD- controls and unknown PPD status respectively. However, the OR of the positivity incidence in patients with sarcoidosis versus PPD+ controls (latent tuberculosis infection; LTBI) was 0.26 (95% 0.10–0.66). Regarding the humoral response, pooled analysis of the positivity incidence revealed an OR (95%CI) of 20.43 (5.53–75.53) for the patients with sarcoidosis versus controls; the ORs were 11.93 (95% CI 2.15–66.27) and 41.97 (95% CI 5.24–336.15) in two subgroups of controls with PPD- and unknown PPD statuses respectively. Data on heterogeneity and evidence of publication bias were examined. Conclusions This meta-analysis confirmed the existence of an association between mycobacteria (especially M.tuberculosis) and sarcoidosis. The current available evidence indicates that some insoluble mycobacterial antigens that preferentially within the body are involved in the pathogenesis of sarcoidosis rather than the whole mycobacteria and that they elicit a type IV immune response.
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Affiliation(s)
- Chuling Fang
- Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Hui Huang
- Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Zuojun Xu
- Department of Respiratory Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- * E-mail:
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93
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Rationale and Design of the Genomic Research in Alpha-1 Antitrypsin Deficiency and Sarcoidosis (GRADS) Study. Sarcoidosis Protocol. Ann Am Thorac Soc 2016; 12:1561-71. [PMID: 26193069 DOI: 10.1513/annalsats.201503-172ot] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Sarcoidosis is a systemic disease characterized by noncaseating granulomatous inflammation with tremendous clinical heterogeneity and uncertain pathobiology and lacking in clinically useful biomarkers. The Genomic Research in Alpha-1 Antitrypsin Deficiency and Sarcoidosis (GRADS) study is an observational cohort study designed to explore the role of the lung microbiome and genome in these two diseases. This article describes the design and rationale for the GRADS study sarcoidosis protocol. The study addresses the hypothesis that distinct patterns in the lung microbiome are characteristic of sarcoidosis phenotypes and are reflected in changes in systemic inflammatory responses as measured by peripheral blood changes in gene transcription. The goal is to enroll 400 participants, with a minimum of 35 in each of 9 clinical phenotype subgroups prioritized by their clinical relevance to understanding of the pathobiology and clinical heterogeneity of sarcoidosis. Participants with a confirmed diagnosis of sarcoidosis undergo a baseline visit with self-administered questionnaires, chest computed tomography, pulmonary function tests, and blood and urine testing. A research or clinical bronchoscopy with a research bronchoalveolar lavage will be performed to obtain samples for genomic and microbiome analyses. Comparisons will be made by blood genomic analysis and with clinical phenotypic variables. A 6-month follow-up visit is planned to assess each participant's clinical course. By the use of an integrative approach to the analysis of the microbiome and genome in selected clinical phenotypes, the GRADS study is powerfully positioned to inform and direct studies on the pathobiology of sarcoidosis, identify diagnostic or prognostic biomarkers, and provide novel molecular phenotypes that could lead to improved personalized approaches to therapy for sarcoidosis.
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94
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Talwar H, Talreja J, Samavati L. T7 Phage Display Library a Promising Strategy to Detect Tuberculosis Specific Biomarkers. ACTA ACUST UNITED AC 2016; 6. [PMID: 27867751 DOI: 10.4172/2161-1068.1000214] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
One-third of the world's population is infected with tuberculosis, only 10% will develop active disease and the remaining 90% is considered to have latent TB (LTB). While active TB is contagious and can be lethal, the LTB can evolve to active TB. The diagnosis of TB can be challenging, especially in the early stages, due to the variability in presentation and nonspecific signs and symptoms. Currently, we have limited tools available to diagnose active TB, predict treatment efficacy and cure of active tuberculosis, the reactivation of latent tuberculosis infection, and the induction of protective immune responses through vaccination. Therefore, the identification of robust and accurate tuberculosis-specific biomarkers is crucial for the successful eradication of TB. In this commentary, we summarized the available methods for diagnosis and differentiation of active TB from LTB and their limitations. Additionally, we present a novel peptide microarray platform as promising strategy to identify TB biomarkers.
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Affiliation(s)
- Harvinder Talwar
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine and Detroit Medical Center, Detroit, MI
| | - Jaya Talreja
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine and Detroit Medical Center, Detroit, MI
| | - Lobelia Samavati
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine and Detroit Medical Center, Detroit, MI; Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, E. Canfield, Detroit, MI, USA
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95
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Gelbard A, Katsantonis NG, Mizuta M, Newcomb D, Rotsinger J, Rousseau B, Daniero JJ, Edell ES, Ekbom DC, Kasperbauer JL, Hillel AT, Yang L, Garrett CG, Netterville JL, Wootten CT, Francis DO, Stratton C, Jenkins K, McGregor TL, Gaddy JA, Blackwell TS, Drake WP. Molecular analysis of idiopathic subglottic stenosis for Mycobacterium species. Laryngoscope 2016; 127:179-185. [PMID: 27295947 PMCID: PMC5156582 DOI: 10.1002/lary.26097] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 04/25/2016] [Indexed: 01/22/2023]
Abstract
Objectives/Hypothesis Idiopathic subglottic stenosis (iSGS) is an unexplained obstruction involving the lower laryngeal and upper tracheal airway. Persistent mucosal inflammation is a hallmark of the disease. Epithelial microbiota dysbiosis is found in other chronic inflammatory mucosal diseases; however, the relationship between tracheal microbiota composition and iSGS is unknown. Given the critical role for host defense at mucosal barriers, we analyzed tissue specimens from iSGS patients for the presence of microbial pathogens. Methods Utilizing 30 human iSGS, 20 intubation‐related tracheal stenosis (iLTS), and 20 healthy control specimens, we applied molecular, immunohistochemical, electron microscopic, immunologic, and Sanger‐sequencing techniques. Results With unbiased culture‐independent nucleic acid, protein, and immunologic approaches, we demonstrate that Mycobacterium species are uniquely associated with iSGS. Phylogenetic analysis of the mycobacterial virulence factor rpoB suggests that, rather than Mycobacterium tuberculosis, a variant member of the Mycobacterium tuberculosis complex or a closely related novel mycobacterium is present in iSGS specimens. Conclusion These studies identify a novel pathogenic role for established large airway bacteria and provide new targets for future therapeutic intervention. Level of Evidence NA Laryngoscope, 127:179–185, 2017
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Affiliation(s)
- Alexander Gelbard
- Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee
| | | | - Masanobu Mizuta
- Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee
| | - Dawn Newcomb
- Department of Medicine, Division of Pulmonary and Critical Care, Vanderbilt University, Nashville, Tennessee
| | - Joseph Rotsinger
- Department of Medicine, Division of Infectious Disease, Vanderbilt University, Nashville, Tennessee
| | - Bernard Rousseau
- Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee
| | - James J Daniero
- Department of Otolaryngology, University of Virginia Health System, Charlottesville, Virginia
| | - Eric S Edell
- Department of Medicine, Division of Pulmonary and Critical Care, Mayo Clinic, Rochester, Minnesota
| | - Dale C Ekbom
- Department of Otolaryngology, Mayo Clinic, Rochester, Minnesota
| | | | | | - Liying Yang
- Department of Medicine, New York University School of Medicine, New York, New York, U.S.A
| | - C Gaelyn Garrett
- Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee
| | | | | | - David O Francis
- Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee
| | - Charles Stratton
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee
| | - Kevin Jenkins
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee
| | - Tracy L McGregor
- Department of Pediatrics, Division of Medical Genetics, Vanderbilt University, Nashville, Tennessee
| | - Jennifer A Gaddy
- Department of Medicine, Division of Infectious Disease, Vanderbilt University, Nashville, Tennessee.,Veterans Affairs Tennessee Valley Healthcare Services, Nashville, Tennessee
| | - Timothy S Blackwell
- Department of Medicine, Division of Pulmonary and Critical Care, Vanderbilt University, Nashville, Tennessee.,Veterans Affairs Tennessee Valley Healthcare Services, Nashville, Tennessee
| | - Wonder P Drake
- Department of Medicine, Division of Infectious Disease, Vanderbilt University, Nashville, Tennessee
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Saketkoo LA, Baughman RP. Biologic therapies in the treatment of sarcoidosis. Expert Rev Clin Immunol 2016; 12:817-25. [DOI: 10.1080/1744666x.2016.1175301] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Lesley Ann Saketkoo
- New Orleans Scleroderma and Sarcoidosis Patient Care and Research Center, University Medical Center Comprehensive Pulmonary Hypertension Center, Tulane University Lung Center, New Orleans, LA, USA
| | - Robert P. Baughman
- Department of Medicine, University of Cincinnati Medical Center, Cincinnati, OH, USA
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97
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Abstract
Sarcoidosis is a systemic inflammatory disorder characterised by tissue infiltration by mononuclear phagocytes and lymphocytes with associated non-caseating granuloma formation. Originally described as a disorder of the skin, sarcoidosis can involve any organ with wide-ranging clinical manifestations and disease course. Recent studies have provided new insights into the mechanisms involved in disease pathobiology, and we now know that sarcoidosis has a clear genetic basis largely involving human leukocyte antigen (HLA) genes. In contrast to Mendelian-monogenic disorders--which are generally due to specific and relatively rare mutations often leading to a single amino acid change in an encoded protein--sarcoidosis results from genetic variations relatively common in the general population and involving multiple genes, each contributing an effect of varying magnitude. However, an individual may have the necessary genetic profile and yet the disease will not develop unless an environmental or infectious factor is encountered. Genetics appears also to contribute to the huge variability in clinical phenotype and disease behaviour. Moreover, it has been established that sarcoidosis granulomatous inflammation is a highly polarized T helper 1 immune response that starts with an antigenic stimulus followed by T cell activation via a classic HLA class II-mediated pathway. A complex network of lymphocytes, macrophages, and cytokines is pivotal in the orchestration and evolution of the granulomatous process. Despite these advances, the aetiology of sarcoidosis remains elusive and its pathogenesis incompletely understood. As such, there is an urgent need for a better understanding of disease pathogenesis, which hopefully will translate into the development of truly effective therapies.
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98
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Abstract
Since sarcoidosis was first described more than a century ago, the etiologic determinants causing this disease remain uncertain. Studies suggest that genetic, host immunologic, and environmental factors interact together to cause sarcoidosis. Immunologic characteristics of sarcoidosis include non-caseating granulomas, enhanced local expression of T helper-1 (and often Th17) cytokines and chemokines, dysfunctional regulatory T-cell responses, dysregulated Toll-like receptor signaling, and oligoclonal expansion of CD4+ T cells consistent with chronic antigenic stimulation. Multiple environmental agents have been suggested to cause sarcoidosis. Studies from several groups implicate mycobacterial or propionibacterial organisms in the etiology of sarcoidosis based on tissue analyses and immunologic responses in sarcoidosis patients. Despite these studies, there is no consensus on the nature of a microbial pathogenesis of sarcoidosis. Some groups postulate sarcoidosis is caused by an active viable replicating infection while other groups contend there is no clinical, pathologic, or microbiologic evidence for such a pathogenic mechanism. The authors posit a novel hypothesis that proposes that sarcoidosis is triggered by a hyperimmune Th1 response to pathogenic microbial and tissue antigens associated with the aberrant aggregation of serum amyloid A within granulomas, which promotes progressive chronic granulomatous inflammation in the absence of ongoing infection.
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Affiliation(s)
- Edward S Chen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, The Johns Hopkins University, 5501 Hopkins Bayview Circle, Baltimore, MD, 21224, USA,
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99
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Numakura T, Tamada T, Nara M, Muramatsu S, Murakami K, Kikuchi T, Kobayashi M, Muroi M, Okazaki T, Takagi S, Eishi Y, Ichinose M. Simultaneous development of sarcoidosis and cutaneous vasculitis in a patient with refractory Crohn's disease during infliximab therapy. BMC Pulm Med 2016; 16:30. [PMID: 26864464 PMCID: PMC4750217 DOI: 10.1186/s12890-016-0193-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Accepted: 02/03/2016] [Indexed: 02/06/2023] Open
Abstract
Background Paradoxical inflammations during anti-TNF-α therapy are defined as adverse effects such as psoriasiform skin lesions, uveitis and sarcoidosis-like granulomas induced by immune reactions, not by infectious agents. Here, we report a very rare case of the simultaneous development of sarcoidosis and cutaneous vasculitis in a patient with refractory Crohn’s disease during infliximab therapy and both of which resolved spontaneously without the cessation of infliximab. Case presentation In September 2000, 23-year old Japanese male was diagnosed with Crohn’s disease. Prednisolone in combination with mesalazine was introduced at first and succeeded for almost one year. In June 2002, since his gastrointestinal symptoms relapsed and were refractory, infliximab (IFX) therapy 5 mg/kg was introduced. In February 2011, because he had repeated arthralgia almost every intravenous IFX administration, IFX was increased to 10 mg/kg under the diagnosis of a secondary failure of IFX. In December 2012, he complained of slight dry cough and an itchy eruption on both lower limbs, and he was referred to our hospital due to the appearance of bilateral hilar lymphadenopathy on chest X-ray examination. Chest computed tomogram revealed bilateral hilar lymphadenopathy and fine reticulonodular shadows on the bilateral upper lungs. Serum calcium, angiotensin-converting enzyme and soluble interleukin 2 receptor levels were not elevated, but the titer of antinuclear antibody was considerably elevated. Mycobacterium infection was carefully excluded. Trans-bronchial lung biopsy showed non-caseating epithelioid cell granulomas compatible with sarcoidosis. The skin biopsy of the right limb was diagnosed as leukocytoclastic vasculitis. The patient was diagnosed as having a series of paradoxical inflammations during anti-TNF-α therapy. Since his paradoxical inflammations were not severe and opportunistic infections were excluded, IFX was cautiously continued for refractory Crohn’s disease. Nine months later, not only his intrathoracic lesions but also his cutaneous lesions had spontaneously resolved. Conclusion Physicians caring for patients with anti-TNF-α therapy should know that, based on a careful exclusion of infectious agents and thoughtful assessment of the patient’s possible risks and benefits, paradoxical inflammations can be resolved without the cessation of anti-TNF-α therapy.
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Affiliation(s)
- Tadahisa Numakura
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Tsutomu Tamada
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Masayuki Nara
- Clinical Research, Innovation and Education Center, Tohoku University Hospital, Sendai, Japan.
| | - Soshi Muramatsu
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Koji Murakami
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Toshiaki Kikuchi
- Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
| | - Makoto Kobayashi
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Miho Muroi
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Tatsuma Okazaki
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | | | - Yoshinobu Eishi
- Department of Human Pathology, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Masakazu Ichinose
- Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
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Agrawal R, Kee AR, Ang L, Tun Hang Y, Gupta V, Kon OM, Mitchell D, Zierhut M, Pavesio C. Tuberculosis or sarcoidosis: Opposite ends of the same disease spectrum? Tuberculosis (Edinb) 2016; 98:21-6. [PMID: 27156614 DOI: 10.1016/j.tube.2016.01.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 01/09/2016] [Indexed: 11/16/2022]
Abstract
Tuberculosis and sarcoidosis are chronic systemic diseases that have similar pulmonary and extra-pulmonary manifestations. Multiple studies have found an epidemiological, molecular, and immunological link between the two. It has been suggested that mycobacterium tuberculosis could be a common pathophysiologic mechanism for tuberculosis and sarcoidosis, and that both clinical entities can trigger similar immunological response in patients. Due to this close association, together with possible coexistence in the same patient, the diagnosis of one disease from another may be difficult. In our paper, we suggest that tuberculosis and sarcoidosis are two ends of the same spectrum. Given the pathophysiological and clinical link between the two, we also propose a classification system for tuberculosis and sarcoidosis: Sarcoidosis (S); Sarcoid-Tuberculous (ST); Tuberculous Sarcoid (TS) and Tuberculosis (TB). More research and clinical trials should first be done to affirm the link between the two disease entities.
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Affiliation(s)
- Rupesh Agrawal
- Tan Tock Seng Hospital, National Healthcare Group Eye Institute, Singapore; Moorfields Eye Hospital, London, United Kingdom.
| | - Ae Ra Kee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Leslie Ang
- Tan Tock Seng Hospital, National Healthcare Group Eye Institute, Singapore.
| | - Yeo Tun Hang
- Tan Tock Seng Hospital, National Healthcare Group Eye Institute, Singapore.
| | - Vishali Gupta
- Advanced Eye Centre, Post Graduate Institute of Ophthalmology, Chandigarh, India.
| | - Onn Min Kon
- St Mary's Hospital, Imperial College Healthcare NHS Trust, London, UK.
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