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イマジナルディスクはインスリンのようなペプチド8を分泌し,成長と成熟の可塑性を媒介する
Andres Garelli1, Alisson M Gontijo, Veronica Miguela
1Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas-Universidad Miguel Hernández de Elche, Sant Joan d'Alacant, 03550 Alicante, Spain.
Science (New York, N.Y.)
|May 5, 2012
まとめ
発達中の動物は,ドロソフィラのインスリンのようなペプチドであるDILP8を使用して,異常な成長を伝達し,成熟を遅らせ,正常な成体サイズと発達安定性を確保します. このペプチドは,成長障害の間に生物体の強さを維持する鍵です.
科学分野:
- 発達生物学 発達生物学とは
- 昆虫生物学 昆虫生物学について
- 遺伝学 遺伝学とは
背景:
- 発達中の動物は,成長障害にもかかわらず,正常な成体サイズを確保するために,可塑性を発揮します.
- 組織と臓器のコミュニケーションは,発達中の比例と対称性を維持するために不可欠です.
研究 の 目的:
- ドロソフィラの発達性可塑性およびサイズ調節の基礎となる分子機構を調査する.
- 発達障害に対する反応として,成長と成熟を調整するシグナル伝達経路を特定する.
主な方法:
- Drosophila melanogasterをモデル生物として利用しました.
- 成長と変異におけるドロソフィラのインスリン類似ペプチド8 (DILP8) の役割を調査した.
- エクディゾンのバイオシンセシスとイマジナルディスクの成長に対するDILP8の効果を分析した.
主要な成果:
- イマジナルディスクは,DILP8を自動で活性化し,異常な成長を信号し,変異を遅らせます.
- DILP8は,エクディゾンの生合成を阻害し,イマジナルディスクの成長を遅らせ,成人の正常なサイズを確保します.
- DILP8機能の喪失は,身長の変化と成熟のタイミングの変化を持つ非対称な個体をもたらします.
結論:
- DILP8は,発達的な可塑性の重要な媒介であり,頑丈さと発達的な安定性を保証します.
- DILP8は長距離信号として機能し,成長と発達タイミングを調整します.
- DILP8経路は,比例成長とサイズホメオスタシスを維持するメカニズムに不可欠です.
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