騒音は,ダイナミック・インプット下での転写制御を容易にする.
1Department of Biosystems Science and Engineering, ETH Zürich 4058, Switzerland.
Cell
|January 31, 2015
まとめ
細胞は振動する信号と同期し,遺伝子発現を刺激する. 生化学的な騒音は,この細胞反応を強化し,ダイナミックな環境で効率的な情報処理を可能にします.
科学分野:
- 細胞生物学 細胞生物学
- システム生物学 システム生物学
- バイオフィジックス 生物物理学
背景:
- 細胞は,時間変動の入力を持つ複雑なシグナル環境で動作します.
- 細胞の情報処理と遺伝子発現を理解することは極めて重要です.
研究 の 目的:
- 信号伝送ネットワーク,特にNF-κB経路が,ダイナミック入力処理の仕組みを調査する.
- 細胞の情報処理と遺伝子発現における騒音の役割を決定する.
主な方法:
- マイクロ流体単細胞測定を用いた.
- NF-κB経路のストキャスティックモデリングを使用した.
- 周期性サイトカイン (TNF) の入力に対する研究された応答.
主要な成果:
- 線維芽細胞のNF-κBダイナミクスは,振動するTNF信号と同期し,入り込む.
- トレーニングにより,NF-κBの振動幅とmRNA出力が著しく増加しました.
- 本質的な生化学的騒音は,NF-κBの振動と引き寄せを高めます.
- NF-κBの自然周波数の細胞間変動は,集団の強さを提供します.
- 細胞は,より広い範囲のダイナミック・インプット・期間でエントレインメントを達成した.
結論:
- 振動と騒音のシナージーは,ダイナミックなシグナル環境で効率的な遺伝子発現を可能にします.
- 騒音は,個々の細胞の反応を強化し,集団レベルの強さを促進する二重の役割を果たします.
- セルラーシステムは,調整された振動とノイズを通じて時間変動の信号を処理するために最適化されています.
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