プロスペロ遺伝子は,ドロソフィラの中枢神経系における細胞運命を決定する

C Q Doe¹, Q Chu-LaGraff, D M Wright

¹Department of Cell and Structural Biology, University of Illinois, Urbana 61801.

Cell

|May 3, 1991

まとめ

プロスペロ遺伝子は,ドロソフィラのニューロン多様性にとって極めて重要です. ニューロブラストの細胞運命を制御し,適切なニューロンの発達を保証し,アクソン経路発見の誤りを防止します.

科学分野:

発達生物学発達生物学とは
神経科学は神経科学である.
遺伝学遺伝学とは

背景:

ニューロン多様性の生成メカニズムは,ほとんど不明のままです.
細胞運命を決定する仕組みを理解することは,神経系を解読する鍵となる.
ホメオボックス遺伝子は,中枢神経系の発達に役割を果たします.

研究の目的:

ドロソフィラの中枢神経系における細胞運命を制御する遺伝子を特定する.
ホメオボックス遺伝子発現と細胞運命を左右する突然変異のスクリーニング.
ニューロン幹細胞 (ニューロブラスト) で発現する遺伝子を発見した.

主な方法:

発達中の中枢神経系におけるホメオボックス遺伝子発現を変化させる変異をスクリーニングした.
増強剤のトラップラインを使って,神経芽細胞の遺伝子を特定した.
ニューロブラスト細胞系におけるプロスペロ遺伝子の機能を分析した.

主要な成果:

Prospero遺伝子は,突然変異と増強剤のトラップスクリーンの両方で特定されました.
プロスペロは,神経芽細胞,感覚神経細胞前駆体,および膠質細胞前駆体の一部で発現するが,神経細胞では発現しない.
ニューロブラストにおけるプロスペロ機能の喪失は,異常な細胞系統と,アクソン経路発見の欠陥を持つニューロンを引き起こします.

結論:

プロスペロはニューロブラストで発現する新しい遺伝子です.
プロスペロは,神経細胞の運命を特定し,正しい神経細胞の発達を確保する上で重要な役割を果たします.
Prosperoの適切な機能は,神経細胞の多様性を生み出し,発達上の誤りを防ぐために不可欠です.

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