Longitudinal immune profiles in type 1 leprosy reactions in Bangladesh, Brazil, Ethiopia and Nepal

BMC Infectious Diseases

Research Article

Abraham Aseffa¹  Yonas Bekele¹  Krista E. van Meijgaarden²  Kees L.M.C. Franken²  Susan J.F. van den Eeden²  Tom H.M. Otttenhoff²  Jolien J. van der Ploeg-van Schip²  Kidist Bobosha³  Annemieke Geluk⁴  John S. Spencer⁵  Sayera Banu⁶  Louis Wilson⁶  Hymonti Dey⁶  Senjuti Kabir⁶  Saraswoti Khadge⁷  Deanna A. Hagge⁷  Pratibha Thapa⁷  Chhatra B. Kunwar⁷  Janaina Lobato⁸  Luiz R. Goulart⁸  Linda Oskam⁸  Washington Carvalho⁸  Isabela M. Goulart⁸ 

[1] Armauer Hansen Research Institute, Addis Ababa, Ethiopia;Dept. of Infectious Diseases, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC, Leiden, The Netherlands;Dept. of Infectious Diseases, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC, Leiden, The Netherlands;Armauer Hansen Research Institute, Addis Ababa, Ethiopia;Dept. of Infectious Diseases, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC, Leiden, The Netherlands;KIT Biomedical Research, Royal Tropical Institute, Amsterdam, The Netherlands;Dept. of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, USA;International Center for Diarrhoeal Disease Research Bangladesh, Dhaka, Bangladesh;Mycobacterial Research Laboratories, Anandaban Hospital, Kathmandu, Nepal;National Reference Center for Sanitary Dermatology and Leprosy, Faculty of Medicine, Federal University of Uberlandia, Minas Gerais, Brazil;

关键词: Biomarkers;    Cytokines;    Diagnostics;    Leprosy;    M. leprae;    Ratios;    Reactions;   

DOI  :  10.1186/s12879-015-1128-0

 received in 2015-05-01, accepted in 2015-09-18,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundAcute inflammatory reactions are a frequently occurring, tissue destructing phenomenon in infectious- as well as autoimmune diseases, providing clinical challenges for early diagnosis. In leprosy, an infectious disease initiated by Mycobacterium leprae (M. leprae), these reactions represent the major cause of permanent neuropathy. However, laboratory tests for early diagnosis of reactional episodes which would significantly contribute to prevention of tissue damage are not yet available.Although classical diagnostics involve a variety of tests, current research utilizes limited approaches for biomarker identification. In this study, we therefore studied leprosy as a model to identify biomarkers specific for inflammatory reactional episodes.MethodsTo identify host biomarker profiles associated with early onset of type 1 leprosy reactions, prospective cohorts including leprosy patients with and without reactions were recruited in Bangladesh, Brazil, Ethiopia and Nepal. The presence of multiple cyto-/chemokines induced by M. leprae antigen stimulation of peripheral blood mononuclear cells as well as the levels of antibodies directed against M. leprae-specific antigens in sera, were measured longitudinally in patients.ResultsAt all sites, longitudinal analyses showed that IFN-γ-, IP-10-, IL-17- and VEGF-production by M. leprae (antigen)-stimulated PBMC peaked at diagnosis of type 1 reactions, compared to when reactions were absent. In contrast, IL-10 production decreased during type 1 reaction while increasing after treatment. Thus, ratios of these pro-inflammatory cytokines versus IL-10 provide useful tools for early diagnosing type 1 reactions and evaluating treatment. Of further importance for rapid diagnosis, circulating IP-10 in sera were significantly increased during type 1 reactions. On the other hand, humoral immunity, characterized by M. leprae-specific antibody detection, did not identify onset of type 1 reactions, but allowed treatment monitoring instead.ConclusionsThis study identifies immune-profiles as promising host biomarkers for detecting intra-individual changes during acute inflammation in leprosy, also providing an approach for other chronic (infectious) diseases to help early diagnose these episodes and contribute to timely treatment and prevention of tissue damage.

【 授权许可】

CC BY   
© Khadge et al. 2015