Bocは,コンシューラール軸索の誘導におけるソニック・ヘッジホッグの受容体である
Ami Okada1, Frédéric Charron, Steves Morin
1Department of Biological Sciences, Stanford University, Stanford, California 94305, USA. amio@stanford.edu
Nature
|November 7, 2006
まとめ
この研究では,Bocは,脊髄のコミッショラル軸索を誘導するソニック・ヘッジホッグ (Shh) の重要な受容体であると特定しています. Bocを妨害すると,軸索が誤導され,神経発達におけるその重要な役割が強調されます.
科学分野:
- 神経科学は神経科学である.
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
背景:
- ソニック・ヘッジホッグ (Shh) は,腹部ニューロン発育と脊髄におけるコンミュラール軸索の誘導に不可欠です.
- Shhは,コミッショラル軸索のミッドライン派生化学吸引剤として作用するが,その受容体は未確認のままである.
研究 の 目的:
- Shh媒介の化学的引き寄せに責任を負う受容体 (S) を特定する.
- 潜在的なShh受容体として,Roboに関連したタンパク質,BocとCdonの役割を調査する.
主な方法:
- タンパク質結合アッセイで,ShhとBoc,Cdonとの相互作用をテストする.
- ネズミのBocの遺伝的破壊は,コンシューラルの軸索誘導への影響を観察するために.
- ネズミのアクソンにおけるBocのIn vitroノックダウンで,Shhグラデントに対する応答を評価する.
主要な成果:
- BocとCdonは,Shhに特異的に結合し,候補受容体として識別することが判明しました.
- マウスにおけるBocの標的の干渉は,床板に向かってコンシューラール軸索の誤導をもたらした.
- Bocのノックダウンは,ネズミのコンシューラール軸索のShhに対する化学的反応をインビトロで低下させた.
結論:
- Bocは,コンシューラルの軸索誘導の文脈でShhの重要な受容体として機能する.
- これらの発見は,脊髄における神経回路形成の基礎となる重要な分子機構を明らかにしています.
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