異なるドーパミン受容体の経路が,関連学習の時間的感受性の基礎となっている
Annie Handler1, Thomas G W Graham1, Raphael Cohn1
1Laboratory of Neurophysiology and Behavior, The Rockefeller University, New York, NY 10065, USA.
Cell
|June 25, 2019
まとめ
フルーツ・フライは タイミングに基づいて 匂いの関連性を学び 忘れるのです ドーパミン受容体は この時間感覚を制御し 環境の変化に対応した 柔軟な行動の更新を可能にします
科学分野:
- 神経科学
- 動物 の 行動
- 分子生物学
背景:
- 動物は環境イベントのタイミングを使って 予測的な関連性を形成します
- 時間の感受性の分子および回路のメカニズムは完全に理解されていません.
研究 の 目的:
- ドロソフィラの嗅覚学習と記憶における時間感受性のメカニズムを調査する.
- ドーパミン受容体が試験ごとに関連性可塑性を媒介する役割を明らかにする.
主な方法:
- ドロソフィラの神経活動と行動の同期記録
- 嗅覚関連学習と記憶の分析
- ドーパミン受容体 (DopR1とDopR2) とその信号伝達経路の機能を研究する.
主要な成果:
- ドロソフィラの嗅覚関連は,匂い-ドーパミンのタイミングに基づいて迅速に記述され,逆転することができます.
- 双方向神経の可塑性は 学習した行動の逆転と相関しています
- ドーパミン受容体DopR1とDopR2は,一時的なシグナルに基づいて,異なるシナプス可塑性 (抑うつと増強) を媒介する.
結論:
- ドーパミン受容体のシグナリングは イベントの順序を検知し 反対のシナプスと 行動の可塑性を誘導します
- このメカニズムは動的な環境で 動物が柔軟に アソシエーションを更新できるようにします
- 関連学習における時間感覚の分子の基礎を明らかにした.
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