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Notch Signaling Pathway

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...

Regulation of Angiogenesis and Blood Supply

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...

Development of Blood Vessels

Development of Blood Vessels

The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...

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関連する実験動画

Updated: Jul 6, 2026

Light-sheet Fluorescence Microscopy to Capture 4-Dimensional Images of the Effects of Modulating Shear Stress on the Developing Zebrafish Heart

Light-sheet Fluorescence Microscopy to Capture 4-Dimensional Images of the Effects of Modulating Shear Stress on the Developing Zebrafish Heart

Published on: August 10, 2018

ゲッチ・シグナリングは,ゼブラフィッシュの動脈の発達における血管新生細胞の行動を制限する.

Arndt F Siekmann¹, Nathan D Lawson

¹Program in Gene Function and Expression, University of Massachusetts Medical School, Lazare Research Building, 364 Plantation Street, Worcester, Massachusetts 01605, USA.

|January 30, 2007

まとめ

Notchシグナリングは,ゼブラフィッシュの血管発達中に細胞を傾けさせるための内皮細胞の行動を制限します. Notchのシグナル伝達を妨害すると,過剰な発芽と異常な細胞数が起こり,血管新生における重要な役割を強調します.

科学分野:

発達生物学発達生物学とは
細胞生物学細胞生物学
血管生物学血管生物学とは

背景:

成長する血管の芽の内皮細胞は,多様な細胞の運命と行動を示します.
これらの細胞の特徴を決定する特定のシグナルについては,ほとんど不明のままである.

研究の目的:

斑馬魚のセグメンタル動脈における血管新生中の内皮細胞の行動を決定するノッチ信号の役割を調査する.
ノッチ・シグナリングが細胞の運命を調節し,血管芽の発達中の位置を調節する分子メカニズムを特定する.

主な方法:

ゼブラフィッシュの胚を用いてin vivo研究を行いました.
細胞の位置と行動を評価するためにモザイク分析を使用しました.
発芽中の内皮細胞動態を観察するために,in vivoのタイムラップスイメージングが行われます.
flt4とdll4の遺伝子発現パターンを研究した.
Rbpsuh,flt4,dll4の遺伝子ノックアウト研究を実施しました.

主要な成果:

ノッチ・シグナリングは,ゼブラフィッシュのセグメンタル動脈の細胞を傾けるための血管新生行動を制限するために不可欠です.
Rbpsuh (Notchのシグナル伝達成分) の喪失は,過剰な発芽と内皮細胞数の増加をもたらしました.

さらに関連する動画

Labeling of Blood Vessels in the Teleost Brain and Pituitary Using Cardiac Perfusion with a DiI-fixative

Labeling of Blood Vessels in the Teleost Brain and Pituitary Using Cardiac Perfusion with a DiI-fixative

Published on: June 13, 2019

Manipulating Mechanical Forces in the Developing Zebrafish Heart Using Magnetic Beads

Manipulating Mechanical Forces in the Developing Zebrafish Heart Using Magnetic Beads

Published on: January 3, 2025

関連する実験動画

Last Updated: Jul 6, 2026

Light-sheet Fluorescence Microscopy to Capture 4-Dimensional Images of the Effects of Modulating Shear Stress on the Developing Zebrafish Heart

Light-sheet Fluorescence Microscopy to Capture 4-Dimensional Images of the Effects of Modulating Shear Stress on the Developing Zebrafish Heart

Published on: August 10, 2018

Labeling of Blood Vessels in the Teleost Brain and Pituitary Using Cardiac Perfusion with a DiI-fixative

Labeling of Blood Vessels in the Teleost Brain and Pituitary Using Cardiac Perfusion with a DiI-fixative

Published on: June 13, 2019

Manipulating Mechanical Forces in the Developing Zebrafish Heart Using Magnetic Beads

Manipulating Mechanical Forces in the Developing Zebrafish Heart Using Magnetic Beads

Published on: January 3, 2025

ノッチ活性化により血管新生が抑制され,先端細胞の位置から細胞を除く.

尖端細胞のflt4発現は,Notchが欠けていたので,その発現が妨げられ,その喪失は部分的に細胞数欠陥を回復させた.

また,ノッチ・リガンドdll4の喪失により,内皮細胞数が増加した.

結論:

芽細胞内の内皮細胞のアイデンティティ,位置,および行動の適切な仕様は,正常な血管新生にとって重要です.
Notchシグナル伝達経路は,血管の発達中にこれらのプロセスを調節する上で基本的な役割を果たします.