Epigenetic regulation of Matrix metalloproteinase-1 and -3 expression in mycobacterium tuberculosis infection
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Published version
Author(s)
Moores, R
Dos Santos Brilha, S
Schutgens, F
Elkington, P
Friedland, JS
Type
Journal Article
Abstract
In pulmonary tuberculosis (TB), the inflammatory immune response against Mycobacterium tuberculosis (Mtb) is associated with tissue destruction and cavitation, which drives disease transmission, chronic lung disease, and mortality. Matrix metalloproteinase (MMP)-1 is a host enzyme critical for the development of cavitation. MMP expression has been shown to be epigenetically regulated in other inflammatory diseases, but the importance of such mechanisms in Mtb-associated induction of MMP-1 is unknown. We investigated the role of changes in histone acetylation in Mtb-induced MMP expression using inhibitors of histone deacetylases (HDACs) and histone acetyltransferases (HAT), HDAC siRNA, promoter-reporter constructs, and chromatin immunoprecipitation assays. Mtb infection decreased Class I HDAC gene expression by over 50% in primary human monocyte-derived macrophages but not in normal human bronchial epithelial cells (NHBEs). Non-selective inhibition of HDAC activity decreased MMP-1/-3 expression by Mtb-stimulated macrophages and NHBEs, while class I HDAC inhibition increased MMP-1 secretion by Mtb-stimulated NHBEs. MMP-3 expression, but not MMP-1, was downregulated by siRNA silencing of HDAC1. Inhibition of HAT activity also significantly decreased MMP-1/-3 secretion by Mtb-infected macrophages. The MMP-1 promoter region between −2,001 and −2,942 base pairs from the transcriptional start site was key in control of Mtb-driven MMP-1 gene expression. Histone H3 and H4 acetylation and RNA Pol II binding in the MMP-1 promoter region were increased in stimulated NHBEs. In summary, epigenetic modification of histone acetylation via HDAC and HAT activity has a key regulatory role in Mtb-dependent gene expression and secretion of MMP-1 and -3, enzymes which drive human immunopathology. Manipulation of epigenetic regulatory mechanisms may have potential as a host-directed therapy to improve outcomes in the era of rising TB drug resistance.
Date Issued
2017-05-24
Date Acceptance
2017-05-08
Citation
Frontiers in Immunology, 2017, 8
ISSN
1664-3224
Publisher
Frontiers Media
Journal / Book Title
Frontiers in Immunology
Volume
8
Copyright Statement
© 2017 Moores, Brilha, Schutgens, Elkington and Friedland. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Subjects
Science & Technology
Life Sciences & Biomedicine
Immunology
Mycobacterium tuberculosis
matrix metalloproteinases
histone deacetylases
histone acetyltransferases
epigenetics
NF-KAPPA-B
HISTONE DEACETYLASE INHIBITORS
NASAL EPITHELIAL-CELLS
SYNOVIAL FIBROBLASTS
GENE-EXPRESSION
ANACARDIC ACID
MATRIX-METALLOPROTEINASE-9
TRANSCRIPTION
ACETYLATION
SECRETION
Publication Status
Published
Article Number
602