Redox-sensitive gene-regulatory events controlling aberrant matrix metalloproteinase-1 expression.
Redox-sensitive gene-regulatory events controlling aberrant matrix metalloproteinase-1 expression.
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DOI:
10.1016/j.freeradbiomed.2014.06.017
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发表时间:
2014-09
影响因子:
7.4
通讯作者:
Melendez, J. Andres
中科院分区:
文献类型:
--
作者:
Bartling, Toni R.;Subbaram, Sita;Clark, Ryan R.;Chandrasekaran, Akshaya;Kar, Supriya;Melendez, J. Andres
关键词:
Aberrant matrix metalloproteinase-1 (MMP-1) expression contributes to the pathogenesis of many degenerative disease processes that are associated with increased oxidative damage or stress. We and others have established that shifts in steady-state H2O2 production resulting from enforced antioxidant gene expression, senescence or UV irradiation control MMP-1 expression. Here we establish that histone deacetylase-2 (HDAC2) protein levels and its occupancy of the MMP-1 promoter are decreased in response to enforced manganese superoxide dismutase expression (Sod2). Inhibition of histone deacetylase (HDAC) activity further accentuates the redox-dependent expression of MMP-1. Sod2-dependent decreases in HDAC2 are associated with increases in a proteasome-sensitive pool of ubiquitinylated HDAC2 and MMP-1 specific histone H3 acetylation. Sod2 overexpression also enhanced recruitment of Ets-1, c-Jun, c-Fos, and the histone acetyltransferase (HAT) PCAF to the distal and proximal region of the MMP-1 promoter. Furthermore, the Sod2-dependent expression of MMP-1 can be reversed by silencing the transcriptional activator c-Jun. All of the above Sod2-dependent alterations are largely reversed by catalase coexpression, indicating that the redox-control of MMP-1 is H2O2-dependent. These findings identify a novel redox-regulation of MMP-1 transcription that involves site specific promoter recruitment of both activating factors and chromatin modifying enzymes, which converge to maximally drive MMP-1 gene expression.
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