Oxidative stress and chromatin remodeling in chronic obstructive pulmonary disease and smoking-related diseases

Isaac K Sundar, Hongwei Yao, Irfan Rahman

Research output: Contribution to journalLiterature reviewpeer-review

Abstract

SIGNIFICANCE:
Chronic obstructive pulmonary disease (COPD) is predominantly a tobacco smoke-triggered disease with features of chronic low-grade systemic inflammation and aging (inflammaging) of the lung associated with steroid resistance induced by cigarette smoke (CS)-mediated oxidative stress. Oxidative stress induces various kinase signaling pathways leading to chromatin modifications (histone acetylation/deacetylation and histone methylation/demethylation) in inflammation, senescence, and steroid resistance.
RECENT ADVANCES:
Histone mono-, di-, or tri-methylation at lysine residues result in either gene activation (H3K4, H3K36, and H3K79) or repression (H3K9, H3K27, and H3K20). Cross-talk occurs between various epigenetic marks on histones and DNA methylation. Both CS and oxidants alter histone acetylation/deacetylation and methylation/demethylation leading to enhanced proinflammatory gene expression. Chromatin modifications occur in lungs of patients with COPD. Histone deacetylase 2 (HDAC2) reduction (levels and activity) is associated with steroid resistance in response to oxidative stress. Critical Issues: Histone modifications are associated with DNA damage/repair and epigenomic instability as well as premature lung aging, which have implications in the pathogenesis of COPD. HDAC2/SIRTUIN1 (SIRT1)-dependent chromatin modifications are associated with DNA damage-induced inflammation and senescence in response to CS-mediated oxidative stress.
FUTURE DIRECTIONS:
Understanding CS/oxidative stress-mediated chromatin modifications and the cross-talk between histone acetylation and methylation will demonstrate the involvement of epigenetic regulation of chromatin remodeling in inflammaging. This will lead to identification of novel epigenetic-based therapies against COPD and other smoking-related lung diseases. Pharmacological activation of HDAC2/SIRT1 or reversal of their oxidative post-translational modifications may offer therapies for treatment of COPD and CS-related diseases based on epigenetic histone modifications.
Original languageEnglish
Pages (from-to)1956-71
Number of pages16
JournalAntioxidants and Redox Signaling
Volume18
Issue number15
DOIs
Publication statusPublished - 20 May 2013

Keywords

  • Acetylation
  • Chromatin Assembly and Disassembly
  • DNA METHYLATION
  • Histones
  • Humans
  • METHYLATION
  • Oxidation reduction
  • Oxidation Stress
  • Phosphotransferases
  • Pulmonary Disease, Chronic Obstructive
  • Signal Transduction
  • SMOKING

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