Pth2ニューロペプチドは,機械感知によって動的に他者を感知する
Lukas Anneser1, Ivan C Alcantara1,2, Anja Gemmer1
1Max Planck Institute for Brain Research, Frankfurt, Germany.
Nature
|December 3, 2020
まとめ
ゼブラフィッシュの社会的隔離は pth2 遺伝子発現を減少させ,短期的な社会的接触によって救出されます. この反応は 視覚や嗅覚ではなく 隣接する魚からの 機械的なシグナルによって引き起こされます
科学分野:
- 神経科学
- 行動生物学
- 遺伝学
背景:
- 社会的な種は生存のために集団生活に依存しています
- 隔離はニューロンの遺伝子発現と行動に影響します
研究 の 目的:
- ゼブラフィッシュのpth2遺伝子転写に及ぼす社会的孤立の影響を調査する.
- 社会的密度に応じてpth2発現を調節する感覚的様式とメカニズムを特定する.
主な方法:
- ゼブラフィッシュのpth2トランスクリプトレベルは,さまざまな社会的条件 (孤立,社会的曝露) で監視される.
- 感覚操作 (視覚的,化学的,機械的) と標的細胞除去 (ニューロマスト) を利用した.
- pth2レベルに対する 機械的な水の乱れの影響を評価した.
主要な成果:
- 社会的隔離は pth2 遺伝子の転写を著しく低下させた.
- 30分間の社会的な接触は pth2レベルを 急速に回復させました
- pth2表現は,魚の存在と群の密度を追跡した.
- 側線経由の機械的感覚インプットはpth2応答を媒介した.
- 視覚的および化学的なシグナルはpth2レベルに影響を与えなかった.
結論:
- ニューロペプチドPth2は,社会的人口密度を感知し,それに反応する役割を果たします.
- 魚の動きによる機械的なシグナルは,pth2発現を制御するのに不可欠です.
- 横線システムは 機械的な刺激を通して 社会的密度を検出する鍵です
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