Disturbance of a mitochondrial DNA expression in gerbil hippocampus after transient forebrain ischemia

Koji Abe, J. Kawagoe, T. H. Lee, M. Aoki, K. Kogure

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Hippocampal CA1 neurons are the most vulnerable to transient cerebral ischemia. However, the mechanism has not been fully understood. The level of mRNA for cytochrome c oxidase subunit I (COX-I), which is encoded by mitochondrial DNA (mtDNA), progressively decreased in the hippocampal CA1 neurons of gerbils from 1 to 3 h of the reperfusion after 3.5 min of transient forebrain ischemia, and completely disappeared at 7 days. The activity of cytochrome c oxidase (COX) protein also showed the early decrease in the CA1 cells, and was followed by the reduction of the level of COX-I DNA after 2 days. However, the activity of succinic dehydrogenase (SDH), a mitochondrial enzyme that is encoded by nuclear DNA, maintained normal activity until 1 day in the CA1 cells, and significantly decreased at 7 days. These results suggest that disturbance of mitochondrial DNA expression occurred in the CA1 neurons at the early stage of reperfusion, and was aggravated in the course of time. The disturbance could cause progressive failure of energy production of the cells that eventually results in the neuronal cell death.

Original languageEnglish
Pages (from-to)69-75
Number of pages7
JournalMolecular Brain Research
Volume19
Issue number1-2
DOIs
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Gerbillinae
Prosencephalon
Mitochondrial DNA
Hippocampus
Ischemia
Electron Transport Complex IV
Neurons
Reperfusion
Succinate Dehydrogenase
DNA
Transient Ischemic Attack
Oxidoreductases
Cell Death
Messenger RNA
Enzymes
Proteins

Keywords

  • Cytochrome c oxidase
  • Ischemia
  • Mitochondrial DNA

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience

Cite this

Disturbance of a mitochondrial DNA expression in gerbil hippocampus after transient forebrain ischemia. / Abe, Koji; Kawagoe, J.; Lee, T. H.; Aoki, M.; Kogure, K.

In: Molecular Brain Research, Vol. 19, No. 1-2, 1993, p. 69-75.

Research output: Contribution to journalArticle

Abe, Koji ; Kawagoe, J. ; Lee, T. H. ; Aoki, M. ; Kogure, K. / Disturbance of a mitochondrial DNA expression in gerbil hippocampus after transient forebrain ischemia. In: Molecular Brain Research. 1993 ; Vol. 19, No. 1-2. pp. 69-75.
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