Mitochondrial acetyl-CoA reversibly regulates locusspecific histone acetylation and gene expression

Oswaldo A. Lozoya, Tianyuan Wang, Dagoberto Grenet, Taylor C. Wolfgang, Mack Sobhany, Douglas Ganini Da Silva, Gonzalo Riadi, Navdeep Chandel, Richard P. Woychik*, Janine H. Santos

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The impact of mitochondrial dysfunction in epigenetics is emerging, but our understanding of this relationship and its effect on gene expression remains incomplete. We previously showed that acute mitochondrial DNA (mtDNA) loss leads to histone hypoacetylation. It remains to be defined if these changes are maintained when mitochondrial dysfunction is chronic and if they alter gene expression. To fill these gaps of knowledge, we here studied a progressive and a chronic model of mtDNA depletion using biochemical, pharmacological, genomics, and genetic assays. We show that histones are primarily hypoacetylated in both models. We link these effects to decreased histone acetyltransferase activity unrelated to changes in ATP citrate lyase, acetyl coenzyme A synthetase 2, or pyruvate dehydrogenase activities, which can be reversibly modulated by altering the mitochondrial pool of acetyl-coenzyme A. Also, we determined that the accompanying changes in histone acetylation regulate locus-specific gene expression and physiological outcomes, including the production of prostaglandins. These results may be relevant to the pathophysiology of mtDNA depletion syndromes and to understanding the effects of environmental agents that lead to physical or functional mtDNA loss.

Original languageEnglish (US)
Article numbere201800228
JournalLife science alliance
Volume2
Issue number1
DOIs
StatePublished - Feb 2019

ASJC Scopus subject areas

  • Ecology
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Plant Science
  • Health, Toxicology and Mutagenesis

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