匂い受容体は,マウスの嗅覚球の機能回路を指示する
Leonardo Belluscio1, Claudia Lodovichi, Paul Feinstein
1Howard Hughes Medical Institute, Department of Neurobiology, Duke University Medical Center, Durham, North Carolina 27710, USA. belluscl@ninds.nih.gov
Nature
|September 20, 2002
まとめ
嗅覚ニューロンの嗅覚受容体のアイデンティティは,嗅覚球の中で神経回路がどのように形成されるかを決定する. この研究は,子宮外受容体が,球機能と接続性を組織し,感覚処理に影響を与えることを示しています.
科学分野:
- 神経科学は神経科学である.
- 嗅覚系の研究 嗅覚系の研究
- 感覚ニューロン生物学 感覚ニューロン生物学
背景:
- 哺乳類の嗅覚系は,匂いを検知するために多数の受容体を用いる.
- 軸突のプロジェクションは,嗅覚球内の再現可能な球マップを形成する.
- 嗅覚球の回路に対する嗅覚受容体の影響を調査することは極めて重要です.
研究 の 目的:
- 嗅覚受容体が嗅覚球の神経回路を組織しているかどうかを判断する.
- 置換された受容体を持つ遺伝子組み換えマウス (rI7 --> M71) を検査する.
- 受容体のアイデンティティが,球機能と接続性にどのように影響するかを理解する.
主な方法:
- 遺伝子組み換えマウス系 (rI7 --> M71) を利用した.
- 既知のrI7受容体リガンドに対する子宮外球球体の機能的反応を調べた.
- ミトラル/タフテッド・セル・デンドライトによる評価されたポストシナプス・インナーベーション.
- 外部タフテッド細胞の調査された内投影.
主要な成果:
- rI7 -> M71のマウスの子宮外球球体は,rI7受容体リガンドに反応した.
- グローメルールは適切なポストシナプス内置を誘導した.
- ミトラル/タフテッド細胞は,rI7受容体に特徴的な反応を示した.
- 外部のタフテッド細胞は,同機能のグルメリルを結びつける正確なプロジェクションを形成した.
結論:
- 嗅覚受容体のアイデンティティは,球の収束と機能を決定する.
- 受容体のアイデンティティは,嗅覚球内の機能回路も決定する.
- これは,同機能性グルメルールを調整するメカニズムを提供します.
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