低酸素症はミトコンドリアDNAの損傷と遺伝子誘導と関連しています. 心臓病に対する影響
M Corral-Debrinski1, G Stepien, J M Shoffner
1Department of Genetics, Emory University School of Medicine, Atlanta, GA 30322.
JAMA
|October 2, 1991
まとめ
ミトコンドリアDNAの損傷と酸化リン酸化 (OXPHOS) は,心不全の心臓における遺伝子発現の増加を意味します. これは,OXPHOS欠乏が心疾患に寄与することを示唆し,心疾患におけるミトコンドリア機能障害の役割を強調しています.
科学分野:
- 心臓病学 心臓病学
- ミトコンドリア生物学
- 分子医学は分子医学である.
背景:
- 酸化性リン酸化 (OXPHOS) は,細胞のエネルギー生産に不可欠です.
- OXPHOSの欠陥は,ミトコンドリア機能障害と疾患を引き起こす可能性があります.
- ミトコンドリアDNA (mtDNA) の損傷は,様々な病理に関与しています.
研究 の 目的:
- mtDNAの損傷とOXPHOS遺伝子発現の関係について,正常な心臓と病気の心臓の関係について調べる.
- 缺血性および他の心臓疾患におけるmtDNA損傷およびOXPHOSトランスクリプトレベルを定量化するために.
- 心臓病の病原性におけるOXPHOS欠乏の役割を調査する.
主な方法:
- mtDNA損傷の指標として,一般的な4977塩基対mtDNA消去の定量化.
- 心臓組織におけるOXPHOSトランスクリプトレベルに対する総RNAの分析.
- コントロール,イシュケミア,その他の心臓病のグループ間のmtDNA損傷と遺伝子発現の比較.
主要な成果:
- コントロールと比較して,心不全の心臓では,mtDNA損傷 (4977bp消去) の有意な増加が観察されました.
- また,他の心臓病症例のサブセットでもmtDNAダメージのレベルが高かったことが判明しました.
- OXPHOSのトランスクリプトは,検査されたすべての病気の心臓で上位調節され,mtDNAの損傷と相関していました.
結論:
- 缺血性心臓病は,mtDNAの損傷の増加とOXPHOS遺伝子発現によって特徴付けられています.
- mtDNAの損傷は,心臓のOXPHOS欠乏症と強く関連しています.
- OXPHOSの欠陥は,様々な心臓病の病理生理学に寄与する可能性があります.
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