ニューロン-アストロサイト代謝結合は,活動誘発脂肪酸の毒性から保護する
Maria S Ioannou1, Jesse Jackson2, Shu-Hsien Sheu1
1Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA.
Cell
|May 28, 2019
まとめ
ニューロンとアストロサイトは 高度な神経活動中に有毒な脂肪酸から脳を保護するために 脂質代謝を調整します アストロサイトはこれらの脂肪酸を浄化し 神経損傷を防止し 脳ホメオスタシスを維持します
科学分野:
- 神経科学
- 代謝経路
- アストロサイトとニューロンの相互作用
背景:
- 神経細胞とアストロサイトとの代謝の調整は 脳の健康に不可欠です
- 特に神経活動中の脂質代謝のニューロン-アストロサイト結合は十分に理解されていません.
研究 の 目的:
- 神経細胞とアストロサイトとの間の脂質代謝結合のメカニズムを調査する.
- 超活性ニューロンによって生成される 有毒な脂肪酸の処理方法を理解する
主な方法:
- ニューロンからアストロサイトへの脂肪酸の移転を研究した.
- 移転メカニズムとしてApoE陽性脂質粒子を利用した.
- ミトコンドリアのβ酸化によるアストロサイト性脂質滴の消費を調べた.
- 神経細胞活動に反応する 分析されたアストロサイト遺伝子発現の変化
主要な成果:
- 過剰活性ニューロンからの有毒な脂肪酸は,ApoE陽性脂質粒子を介して天体細胞に転送されます.
- アストロサイトはミトコンドリアのβ酸化によってこれらの脂肪酸を代謝する.
- ニューロンの活動に反応して 解毒遺伝子発現プログラムを活性化します
- このプロセスはニューロンを脂肪酸の毒性から保護します
結論:
- 脂肪酸代謝のニューロン-アストロサイト結合は,神経活動が増加したときに重要な保護メカニズムです.
- この調整された代謝経路は 脳のホメオスタシスの維持に不可欠です
- この経路の不調は様々な脳疾患に 寄与する可能性があります
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