Susceptibility to acute rheumatic fever based on differential expression of genes involved in cytotoxicity, chemotaxis, and apoptosis
Details
Publication Year 2014-02,Volume 82,Issue #2,Page 753-761
Journal Title
Infection and Immunity
Publication Type
Journal Article
Abstract
It is unknown why only some individuals are susceptible to acute rheumatic fever (ARF). We investigated whether there are differences in the immune response, detectable by gene expression, between individuals who are susceptible to ARF and those who are not. Peripheral blood mononuclear cells (PBMCs) from 15 ARF-susceptible and 10 nonsusceptible (control) adults were stimulated with rheumatogenic (Rh+) group A streptococci (GAS) or nonrheumatogenic (Rh-) GAS. RNA from stimulated PBMCs from each subject was cohybridized with RNA from unstimulated PBMCs on oligonucleotide arrays to compare gene expression. Thirty-four genes were significantly differentially expressed between ARF-susceptible and control groups after stimulation with Rh+ GAS. A total of 982 genes were differentially expressed between Rh+ GAS- and Rh- GAS-stimulated samples from ARF-susceptible individuals. Thirteen genes were differentially expressed in the same direction (predominantly decreased) between the two study groups and between the two stimulation conditions, giving a strong indication of their involvement. Seven of these were immune response genes involved in cytotoxicity, chemotaxis, and apoptosis. There was variability in the degree of expression change between individuals. The high proportion of differentially expressed apoptotic and immune response genes supports the current model of autoimmune and cytokine dysregulation in ARF. This study also raises the possibility that a "failed" immune response, involving decreased expression of cytotoxic and apoptotic genes, contributes to the immunopathogenesis of ARF.
Publisher
AMER SOC MICROBIOLOGY
Keywords
HEART-DISEASE PATIENTS; MICROARRAY DATA; AUTOIMMUNE MYOCARDITIS; MONONUCLEAR-CELLS; MOLECULAR MIMICRY; T-CELLS; CYTOKINES; SUBSETS; LESIONS
WEHI Research Division(s)
Bioinformatics
Terms of Use/Rights Notice
Copyright © 2014 by the American Society for Microbiology


Creation Date: 2014-04-30 02:25:23
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