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ミトコンドリアのプロテオスタシスの強化は,アミロイドβのプロテオ毒性を減少させる
Vincenzo Sorrentino1, Mario Romani1, Laurent Mouchiroud1
1Laboratory for Integrative and Systems Physiology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
Nature
|December 7, 2017
まとめ
ミトコンドリアのストレス反応は アルツハイマー病の鍵です ミトコンドリアの健康とプロテオスタシスの改善は,アミロイドβの蓄積を減らし,アルツハイマー病のモデルで寿命を延ばすことができます.
科学分野:
- 神経科学
- 分子生物学
- 遺伝学
背景:
- アルツハイマー病 (AD) はアミロイドβペプチドの集積によって特徴付けられていますが,その分子機構と治療法はまだ十分に理解されていません.
- ミトコンドリア機能障害はADのような 神経退行性疾患に 深く関わっています
- mitochondrial unfolded protein response (UPRmt) とミトファギーを含む保存されたミトコンドリアストレス反応のシグネチャーがADモデルで観察されました.
研究 の 目的:
- ミトコンドリアのストレス反応がアミロイドβタンパク質毒性における役割を調査する.
- ADの治療戦略としてミトコンドリアのプロテオスタシスの強化の可能性を調査する.
主な方法:
- 人間,マウス,カエノラブディティス・エレガンスのデータセットのバイオ情報分析.
- アミロイドβタンパク質毒性 (GMC101) のC.elegansモデルを用いた実験的検証
- ミトコンドリア翻訳とミトファジー経路の薬理学的および遺伝的操作.
主要な成果:
- アミロイドβタンパク質毒性疾患では,UPRmtとミトファギーを含むミトコンドリアのストレス反応のシグネチャーが保存されていることが確認された.
- このミトコンドリアのストレス反応は,ADワームモデルにおけるミトコンドリアのプロテオスタシスと健康を維持するために不可欠です.
- ミトコンドリアのプロテオスタシスの強化により,フィットネスが向上し,虫の寿命が延び,細胞,虫,マウスのモデルでアミロイドの蓄積が減少した.
結論:
- ミトコンドリアのプロテオスタシスは,アルツハイマー病を含むアミロイドβプロテオ毒性に関連した疾患を遅らせるために重要な標的である.
- ミトコンドリアトランスレーションとミトファギーをターゲットにすることで,ADおよび関連疾患に対する有望な治療法を提供できます.
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