関連する実験動画
Updated: May 11, 2026
09:10
Generation of Transgenic Hydra by Embryo Microinjection
Published on: September 11, 2014
WNTシグナリング分子は,ディプロブラスティックメタゾーンであるHydra Hydraの軸形成に作用する
B Hobmayer1, F Rentzsch, K Kuhn
1Department of Molecular Cell Biology, Zoological Institute, Darmstadt University of Technology, Germany. hobmayer@bio.tu-darmstadt.de
Nature
|September 23, 2000
まとめ
発達に不可欠なWnt信号は,Hydra.で研究されました. 研究者らは,WntとTCF遺伝子がヘッドオーガナイザー形成と再生の鍵であることを発見し,動物の身体計画進化における彼らの古代の役割を示唆しました.
科学分野:
- 発達生物学 発達生物学について
- 進化生物学の進化生物学について
- 分子生物学は分子生物学である.
背景:
- Wnt信号伝達経路は,胚の発達,オルガノゲネシス,および様々な種の腫瘍形成に不可欠である.
- これらの経路はネマトダから脊椎動物まで保存され,それらの基本的な生物学的重要性を強調しています.
- Wnt信号伝達の進化的起源は,特に初期のメタゾーンでは,ほとんど不明のままである.
研究 の 目的:
- 進化的に古代の動物であるヒドラの重要なWnt信号経路の構成要素を分子的に特徴づけるために.
- ハイドラにおける軸形成とヘッドオーガナイザー開発におけるWntシグナリングの役割を調査する.
- 初期の動物の進化におけるWnt信号の進化的意義を探求する.
主な方法:
- Hydra.のWnt,Dishevelled,GSK3,β-Catenin,Tcf/Lef遺伝子の分子特性について
- ハイドラ芽形成と頭部再生中の遺伝子発現パターンの分析.
- ハイドラ・アグレガートのデノボ・パターン形成における遺伝子発現の調査.
主要な成果:
- WntとTcf遺伝子は,Hydra.の推定ヘッドオーガナイザー領域で発現しています.
- Wnt,β-カテニン,Tcfは,芽生えと再生におけるヘッドオーガナイザーの確立中に転写的に上位調節されます.
- WntとTCFの表現領域は,実験集積におけるヘッドオーガナイザー形成と相関する.
結論:
- Wntシグナリングは,Hydra.の軸形成に役割を果たしています.
- この発見は,Wntシグナル伝達が,初期の動物における軸向パターンの進化の中心的であったという仮説を支持する.
- この研究は,根本的な発達経路の深い進化史の洞察を提供します.
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07:34The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
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The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
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