Caenorhabditis elegansのインターニューロン活動を制御して,化学反応的行動を誘発する
Askin Kocabas1, Ching-Han Shen, Zengcai V Guo
1FAS Center for Systems Biology, Harvard University, Cambridge, Massachusetts 02138, USA. akocabas@cgr.harvard.edu
Nature
|September 25, 2012
まとめ
科学者たちは,食物探求行動を制御するCaenorhabditis elegansの特定の神経活動パターンを特定しました. AIY内ニューロンを操作するだけでは,虫を仮想の食物グラデーションに導くのに十分でした.
科学分野:
- 神経科学は神経科学である.
- 動物の行動 動物の行動
- 遺伝学 遺伝学とは
背景:
- 化学反応は動物が食物を見つけるために不可欠であり,Cayenorhabditis elegansは,この行動を研究するためのモデル生物として機能します.
- 以前の研究では,レーザー除去や変異体研究などの方法を使用して,C. elegansの化学療法に必要なニューロンを特定しました.
- しかし,複雑な化学反応的行動を誘導するのに十分な正確な神経活動パターンは,ほとんど不明のままである.
研究 の 目的:
- 化学反応的行動を制御するのに十分なC. elegansの神経活動パターンを明らかにする.
- インターニューロンの活動が,食物局所化と追跡のための運動プログラムをどのように調整するかを理解する.
主な方法:
- オプトジェネティクスと新しい光学ツールを使用して,自由に動くC. elegans.の神経活動を直接操作しました.
- 特定された内ニューロンで特定の神経活動パターンを導き出し,誘発して化学反応を引き起こした.
- AIYインターニューロンペアに焦点を当てたのは,感覚ニューロンとのポストシナプス接続のためである.
主要な成果:
- 化学作用のための重要な運動器官プログラムを制御する特定の内神経細胞を特定した.
- AIYインターニューロンペアのアクティビティダイナミクスを制御するだけでは,仮想グラデーションの位置付けと追跡を含む化学反応的行動を誘発するのに十分であることを実証しました.
- 2つの異なるAIY活動パターンを発見し,逆転と漸進的な回転を駆動し,化学吸引剤の梯度をナビゲートするのに不可欠です.
結論:
- AIYの特定のインターニューロン活動パターンは,C. elegansの化学反応を制御するのに十分です.
- これらの発見は,神経ダイナミクスが複雑な行動をどのように編成するかについての洞察を提供します.
- AIYの内部神経活動は,感覚の入力に反応する様々なタクシーの行動を調整する上で重要な役割を果たしている可能性が高い.
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