カルシウムで料理する:基本的な出来事からグローバル信号を構成するためのレシピ
M D Bootman1, M J Berridge, P Lipp
1Laboratory of Molecular Signalling, The Babraham Institute, Cambridge, United Kingdom.
Cell
|November 18, 1997
まとめ
細胞は,基本的なカルシウム (Ca2+) を採用し,周波数,振幅,空間における放出イベントを行い,グローバルなCa2+信号を生成する. この調整された徴募は,細胞溶液のCa2+濃度を再生値に向かって駆動し,細胞波を形成します.
科学分野:
- 細胞生物学 細胞生物学
- バイオフィジックス 生物物理学
- カルシウムシグナル伝達
背景:
- グローバルな細胞内カルシウム (Ca2+) 信号は,細胞機能にとって極めて重要です.
- これらの信号は,Ca2+パフのような,調整されたサブセルラー放出イベントから発生すると考えられています.
- これらの基本的な出来事を招集するメカニズムは不明である.
研究 の 目的:
- 細胞が基本的なCa2+放出イベントをどのように利用するかを調査する.
- サブセルラーCa2+信号の徴募モードを明らかにし,グローバルな反応につながる.
- 離散的なCa2+イベントから持続的な細胞シグナル伝達への移行を理解する.
主な方法:
- コンフォカル顕微鏡を用いてCa2+トランジエントを画像化しました.
- ヘラ細胞で実験を行った.
- フォスホイノシチド経路はCa2+信号を誘発するために刺激された.
主要な成果:
- 基本的なCa2+放出イベントは,ペースメーカーの段階で徐々に採用されました.
- 募集は,周波数,振幅,空間領域全体で発生しました.
- 各イベントは,アナログの細胞溶融Ca2+濃度にデジタルで寄与する.
結論:
- 基本的なCa2+イベントの調整された徴募は,周囲のCa2+を再生値に近づけます.
- この過程の結果,地球規模のCa2+波が形成されます.
- これらの採用ダイナミクスを理解することは,細胞信号伝達経路の解読の鍵です.
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