マイクログリアとアストロサイトにおけるNurr1/CoREST経路は,ドーパミナージックニューロンを炎症誘発死亡から保護する
Kaoru Saijo1, Beate Winner, Christian T Carson
1Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Dr., La Jolla, California, CA 92093, USA. ksaijo@ucsd.edu
Cell
|April 7, 2009
まとめ
核受容体Nurr1 (Nurr1) は脳炎症を抑制し,ドーパミン作用のニューロンを保護する. 減少したNurr1は神経炎症を悪化させ,神経毒媒介物質の産生を可能にすることで,パーキンソン病の病原化に寄与する.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- 免疫学 免疫学とは
背景:
- Nurr1 (孤児核受容体) は,ドーパミナージックニューロンの発育と維持に不可欠です.
- Nurr1変異は家族性パーキンソン病と関連しているが,そのメカニズムは不明である.
研究 の 目的:
- 神経炎症におけるNurr1の役割とパーキンソン病との関連を調査する.
- Nurr1が膠質細胞の炎症反応を調節する分子機構を解説する.
主な方法:
- マイクログリアおよびアストロサイトにおけるプロ炎症媒介体発現に対するNurr1の効果を評価した.
- Nurr1のNF-kappaB-p65とCoREST複合体との相互作用を調べました.
- 減少したNurr1がドーパミナージックニューロン生存に与える影響を調査した.
主要な成果:
- Nurr1は,マイクログリアとアストロサイトにおける炎症性神経毒媒介体の生成を阻害する.
- 減少したNurr1は,増幅された神経炎症につながり,ドーパミン作用によるニューロン死を引き起こす.
- Nurr1は,NF-kappaB-p65結合部位にCoRESTを勧誘し,炎症性遺伝子転写を抑制する.
結論:
- Nurr1は,脳における重要な抗炎症因子として作用する.
- パーキンソン病におけるドーパミナージックニューロン喪失に対するNurr1の保護的役割は,膠質の炎症反応を抑制することを含む.
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