bcl-2,c-myc,およびlckによって媒介される3つの異なるIL-2シグナル伝達経路は,血液形成細胞の増殖に協力する
T Miyazaki1, Z J Liu, A Kawahara
1Institute for Molecular and Cellular Biology, Osaka University, Japan.
Cell
|April 21, 1995
まとめ
研究者は,bcl-2を含む細胞サイクル進行を調節する,ラパミシンに敏感な第三の経路を特定しました. この発見は,既存の経路とともに,細胞増殖シグナル伝達に関する新しい洞察を提供します.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- 免疫学 免疫学とは
背景:
- インターリューキン-2受容体のシグナル伝達は,免疫細胞の機能にとって極めて重要です.
- 2つの既知の経路,c-fos/c-junとc-myc誘導は,IL-2受容体のシグナル伝達を媒介する.
- これらの経路を理解することは,細胞増殖を制御する鍵となる.
研究 の 目的:
- インタレウキン-2受容体の下流にある新しいシグナル伝達経路を特定する.
- 細胞増殖におけるラパミシン感受性経路の役割を調査する.
- 細胞循環調節における異なるシグナル伝達分子間の相互作用を解明する.
主な方法:
- BAF-B03の血液生成細胞系を利用した.
- bcl-2やc-myc.のような原発がん遺伝子の発現を調査した.
- p56lckを含む特定のキナーゼと成長因子受容体の役割を調査した.
主要な成果:
- bcl-2誘導につながる第3のラパミシン感受性経路が特定されました.
- 任意の2つの因子 (p56lck,Bcl-2,またはc-Myc) の共同発現が細胞サイクル進行を誘導することを示した.
- 皮膜成長因子受容体のシグナル伝達がp56lck経路に収束する証拠を提供した.
結論:
- IL-2受容体のシグナル伝達には,新しいbcl-2-誘導,ラパミシン感受性経路が関与しています.
- 細胞サイクル通過は,重要なシグナル伝達分子の組み合わせ表現によって調節されます.
- 細胞増殖を調節するシグナル伝達経路は,このアプローチを使用して効果的に解剖することができます.
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