Identification of a systemic interferon-γ inducible antimicrobial gene signature in leprosy patients undergoing reversal reaction.

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ID: 60331
2019
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Abstract
Reversal reactions (RRs) in leprosy are characterized by a reduction in the number of bacilli in lesions associated with an increase in cell-mediated immunity against the intracellular bacterium Mycobacterium leprae, the causative pathogen of leprosy. To identify the mechanisms that contribute to cell-mediated immunity in leprosy, we measured changes in the whole blood-derived transcriptome of patients with leprosy before, during and after RR. We identified an 'RR signature' of 1017 genes that were upregulated at the time of the clinical diagnosis of RR. Using weighted gene correlated network analysis (WGCNA), we detected a module of 794 genes, bisque4, that was significantly correlated with RR, of which 434 genes were part of the RR signature. An enrichment for both IFN-γ and IFN-β downstream gene pathways was present in the RR signature as well as the RR upregulated genes in the bisque4 module, including those encoding proteins of the guanylate binding protein (GBP) family that contributes to antimicrobial responses against mycobacteria. Specifically, GBP1, GBP2, GBP3 and GBP5 mRNAs were upregulated in the RR peripheral blood transcriptome, with GBP1, GBP2 and GBP5 mRNAs also upregulated in the RR disease lesion transcriptome. These data indicate that RRs involve a systemic upregulation of IFN-γ downstream genes including GBP family members as part of the host antimicrobial response against mycobacteria.
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teles2019identificationplos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Teles, Rosane M B;Lu, Jing;Tió-Coma, Maria;Goulart, Isabela M B;Banu, Sayera;Hagge, Deanna;Bobosha, Kidist;Ottenhoff, Tom;Pellegrini, Matteo;Geluk, Annemieke;Modlin, Robert L;
Journal plos neglected tropical diseases
Year 2019
DOI
10.1371/journal.pntd.0007764
URL
Keywords
Migration virulence dissemination toxoplasma gondii cyst crispr actin wave complex dendritic cell motility loss-of-function screen

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