非正規のWnt信号伝達経路のWnt-11の活性化が,心臓形成のために必要である
Petra Pandur1, Matthias Läsche, Leonard M Eisenberg
1[1] Abt Entwicklungsbiochemie, Junior group SFB 271, Universität Göttingen, Humboldtallee 23, D-37073 Göttingen, Germany [2] Abt Biochemie, Universität Ulm, Albert-Einstein-Allee-11, D-89081 Ulm, Germany.
Nature
|August 9, 2002
まとめ
Xenopus Wnt-11は脊椎動物の心臓形成に不可欠である. この遺伝子は,非正規のWntシグナル伝達を活性化し,心臓の発達に不可欠であり,種を超えて保存されています.
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:
- 脊椎動物の心臓形成には,複雑で時間調節されたシグナル伝達経路が含まれています.
- Xenopus laevisでは, gastrulation 中の心臓の特異性は,背唇と内皮からの信号に依存しています.
- Xenopus Wnt-11は,心臓の特異と相関する表現パターンを示しており,心臓の発達におけるその役割を示唆しています.
研究 の 目的:
- Xenopusの心臓形成におけるXWnt-11の役割を調査する.
- 心臓の発達におけるWnt-11の機能が,より高い脊椎動物で保存されているかどうかを判断する.
- 心血管形成におけるXWnt-11が媒介するシグナル伝達経路を解明する.
主な方法:
- クセノプスの胚における機能喪失と機能獲得の実験.
- 胚のエキスプラントにおける収縮性フェノタイプの誘導.
- ネズミのP19幹細胞をネズミのWnt-11条件付け媒介で治療する.
主要な成果:
- XWnt-11は,Xenopus胚の心臓形成に不可欠である.
- XWnt-11は,胚の拡張性において,収縮性心臓のフェノタイプを誘導することができる.
- ミューリンWnt-11はP19細胞の心臓形成を誘発し,機能が保存されていることを示します.
- XWnt-11は,PKCとJNKを含む,β-カテニンとは独立した,非正規のWntシグナリングを使用しています.
結論:
- XWnt-11は,Xenopus.で心臓発達の重要なレギュレータである.
- 非正規のWnt信号は,心臓の発達プログラムにとって不可欠です.
- Wnt-11の心臓形成における役割は,進化的に保存されています.
関連する概念動画
Canonical Wnt Signaling Pathway
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...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Canonical Wnt Signaling Pathway
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...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...


