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NF-kappaBの活性抑制は,アピカル赤皮脊の破壊と異常な肢体形態変異を引き起こす
P B Bushdid1, D M Brantley, F E Yull
1Department of Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-2363, USA.
Nature
|April 29, 1998
まとめ
核因子-カッパB (NF-kappaB) は,アピカル外皮脊 (AER) を形成する,四肢芽の発達に不可欠です. NF-kappaBを阻害すると,四肢の形成が妨げられ,発達障害や遺伝子発現が変化します.
科学分野:
- 発達生物学 発達生物学とは
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 背面タンパク質は,ドロソフィラの胚の背中軸を形作っています.
- ドーサルの脊椎動物の同類は核因子カッパB (NF-kappaB) である.
研究 の 目的:
- 脊椎動物の四肢芽の発達におけるNF-kappaBの役割を調査する.
- NF-kappaBがアピカル外皮脊 (AER) の形成と肢体形態変異をどのように調節するかを理解する.
主な方法:
- NF-kappaB阻害剤のウイルス媒介による投与は,発達中の肢芽に.
- AERの形態学,四肢のサイズ,遠端要素の発達を分析する.
- NF-kappaB抑制に対する反応として,重要な発達遺伝子 (Sonic hedgehog,Twist,BMP-4) の遺伝子発現分析.
主要な成果:
- NF-kappaBは,AER形成と適切な四肢芽組織にとって不可欠です.
- NF-kappaBの活動が中断すると,変形性AER,四肢の縮小,遠端要素の喪失が生じます.
- NF-kappaBの阻害は,Sonic hedgehog,Twist,および骨形態遺伝タンパク質-4の表現を肢体メゼンキームで変化させます.
結論:
- 脊椎動物のNF-kappaBタンパク質は,胚の四肢形成中にエクトダームとメゼンキームの間の成長因子信号を伝達するために不可欠です.
- NF-kappaBは,四肢芽形態変異の間にその原発がん遺伝子c-relの転写を調節する上で重要な役割を果たします.
- これらの発見は,エクトダーマ-メゼンキームシグナル伝達を通じて,四肢の発達を調整するNF-kappaBの新しい機能を確立しています.
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