ドロソフィラの発達中の複合眼への誘導:複数のメカニズムは,R7誘導を単一の網膜前駆細胞に制限する
D L Van Vactor1, R L Cagan, H Krämer
1Howard Hughes Medical Institute, Department of Biological Chemistry, UCLA School of Medicine 90024-1737.
Cell
|December 30, 1991
まとめ
7less (ボス) リガンドと7less (セブ) 受容体のブライドは,ドロソフィラR7細胞の発達を制御する. ボス発現を変化させることで,セブ発現細胞は,R8細胞との接触なしにR7の運命を採用することができ,細胞の運命を決定する新しい洞察を明らかにしています.
科学分野:
- 発達生物学 発達生物学とは
- 細胞シグナリング
- 神経科学は神経科学である.
背景:
- ドロソフィラR7の光受容体細胞の発達は,誘導信号に依存しています.
- 7less (ボス) リガンドと7less (セブ) 受容体のブライドがこの相互作用を媒介する.
- BossはR8細胞特異的であり,sevは複数の細胞タイプで発現する.
研究 の 目的:
- R7細胞の運命決定における空間的および時間的なボス表現の役割を調査する.
- ボス・シグナリングに対するセブ発現細胞の反応性を理解する.
- 細胞の早期の運命へのコミットメントが7経路の活性化にどのように影響するかを調査する.
主な方法:
- ドロソフィラのボス遺伝子発現の遺伝子操作.
- R7光受容体細胞の運命を分析した.
- ラフとNSPLの変異を用いて,細胞の運命へのコミットメントを研究する.
主要な成果:
- ボス発現の変化は,R8.8と接触しないセブ発現細胞のR7細胞運命を誘発した.
- R8と接触するR1-R6の前駆細胞は,ボスに対して反応しなかった.
- R1-R6の運命への早期のコミットメントは,7つの経路のアクティベーションをブロックしました.
結論:
- ボスの空間と時間のコントロールは,R7の細胞運命を決定する.
- 細胞の接触と細胞の先行的な運命へのコミットメントは,細胞経路の応答性に影響を与えます.
- この研究は,ドロソフィラの光受容体発達の重要なメカニズムを明らかにしています.
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