Oxygen-induced mitochondrial biogenesis in the rat hippocampus

Diana Raisovna Gutsaeva, H. B. Suliman, M. S. Carraway, I. T. Demchenko, C. A. Piantadosi

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The hypothesis that damage to mitochondrial DNA by reactive oxygen species increases the activity of nuclear and mitochondrial transcription factors for mitochondrial DNA replication was tested in the in vivo rat brain. Mitochondrial reactive oxygen species generation was stimulated using pre-convulsive doses of hyperbaric oxygen and hippocampal mitochondrial DNA content and neuronal and mitochondrial morphology and cell proliferation were evaluated at 1, 5 and 10 days. Gene expression was subsequently evaluated to assess nuclear and mitochondrial-encoded respiratory genes, mitochondrial transcription factor A, and nuclear respiratory transcription factors-1 and -2. After 1 day, a mitochondrial DNA deletion emerged involving Complex I and IV subunit-encoding regions that was independent of overt neurological or cytological O 2 toxicity, and resolved before the onset of cell proliferation. This damage was attenuated by blockade of neuronal nitric oxide synthase. Compensatory responses were found in nuclear gene expression for manganese superoxide dismutase, mitochondrial transcription factor A, and nuclear respiratory transcription factor-2. Enhanced nuclear respiratory transcription factor-2 binding activity in hippocampus was accompanied by a nearly three-fold boost in mitochondrial DNA content over 5 days. The finding that O 2 activates regional mitochondrial DNA transcription, replication, and mitochondrial biogenesis in the hippocampus may have important implications for maintaining neuronal viability after brain injury.

Original languageEnglish (US)
Pages (from-to)493-504
Number of pages12
JournalNeuroscience
Volume137
Issue number2
DOIs
StatePublished - Jan 9 2006
Externally publishedYes

Fingerprint

Organelle Biogenesis
Mitochondrial DNA
Hippocampus
Oxygen
GA-Binding Protein Transcription Factor
Transcription Factors
DNA Replication
Reactive Oxygen Species
Nuclear Respiratory Factor 1
Cell Proliferation
Gene Expression
Nitric Oxide Synthase Type I
Brain Injuries
Superoxide Dismutase
Brain
Genes

Keywords

  • Hyperbaric oxygen
  • Mitochondria
  • Mitochondrial biogenesis
  • Rats
  • mtDNA deletion

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Gutsaeva, D. R., Suliman, H. B., Carraway, M. S., Demchenko, I. T., & Piantadosi, C. A. (2006). Oxygen-induced mitochondrial biogenesis in the rat hippocampus. Neuroscience, 137(2), 493-504. https://doi.org/10.1016/j.neuroscience.2005.07.061

Oxygen-induced mitochondrial biogenesis in the rat hippocampus. / Gutsaeva, Diana Raisovna; Suliman, H. B.; Carraway, M. S.; Demchenko, I. T.; Piantadosi, C. A.

In: Neuroscience, Vol. 137, No. 2, 09.01.2006, p. 493-504.

Research output: Contribution to journalArticle

Gutsaeva, DR, Suliman, HB, Carraway, MS, Demchenko, IT & Piantadosi, CA 2006, 'Oxygen-induced mitochondrial biogenesis in the rat hippocampus', Neuroscience, vol. 137, no. 2, pp. 493-504. https://doi.org/10.1016/j.neuroscience.2005.07.061
Gutsaeva, Diana Raisovna ; Suliman, H. B. ; Carraway, M. S. ; Demchenko, I. T. ; Piantadosi, C. A. / Oxygen-induced mitochondrial biogenesis in the rat hippocampus. In: Neuroscience. 2006 ; Vol. 137, No. 2. pp. 493-504.
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