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Use of Genetic Profiling in Leprosy to Discriminate Clinical Forms of the Disease
Joshua R. Bleharski,1,2*Huiying Li,3*Christoph Meinken,4*Thomas G. Graeber,3*Maria-Teresa Ochoa,2Masahiro Yamamura,5Anne Burdick,6Euzenir N. Sarno,7Manfred Wagner,8Martin Röllinghoff,4Thomas H. Rea,9Marco Colonna,10Steffen Stenger,4Barry R. Bloom,11David Eisenberg,3Robert L. Modlin1,2
Leprosy presents as a clinical and immunological spectrum ofdisease. With the use of gene expression profiling, we observedthat a distinction in gene expression correlates with and accuratelyclassifies the clinical form of the disease. Genes belongingto the leukocyte immunoglobulin-like receptor (LIR) family weresignificantly up-regulated in lesions of lepromatous patientssuffering from the disseminated form of the infection. In functionalstudies, LIR-7 suppressed innate host defense mechanisms byshifting monocyte production from interleukin-12 toward interleukin-10and by blocking antimicrobial activity triggered by Toll-likereceptors. Gene expression profiles may be useful in definingclinical forms of disease and providing insights into the regulationof immune responses to pathogens.
1 Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA 90095, USA. 2 Division of Dermatology, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA 90095, USA. 3 Department of Chemistry and Biochemistry and Department of Biological Chemistry, Howard Hughes Medical Institute, UCLADepartment of Energy Institute of Genomics and Proteomics, UCLA, Los Angeles, CA 90095, USA. 4 Institut für Klinische Mikrobiologie, Immunologie, und Hygiene, Universität Erlangen, 91054 Erlangen, Germany. 5 Graduate School of Medicine and Dentistry, Okayama University, Okayama, Japan. 6 Department of Dermatology and Cutaneous Surgery, University of Miami, Miami, FL33101, USA. 7 Leprosy Laboratory Institute Oswaldo Cruz, Rio de Janeiro, Brazil. 8 Medizinische Klinik 3, Klinikum Nürnberg, 90340 Nürnberg, Germany. 9 Section of Dermatology, University of Southern California School of Medicine, Los Angeles, CA 90033, USA. 10 Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA. 11 Office of the Dean, Harvard School of Public Health, Boston, MA 02115, USA.
* These authors contributed equally to this work.
To whom correspondence should be addressed. E-mail: rmodlin{at}mednet.ucla.edu
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