関連する実験動画
Updated: Jul 18, 2026

07:46
Triggering Reactive Gliosis In Vivo by a Forebrain Stab Injury
Published on: June 29, 2015
ソニック・ヘッジホッグによる神経皮質パッチ誘発アポトーシスの抑制
Chantal Thibert1, Marie-Aimée Teillet, Françoise Lapointe
1Apoptosis/Differentiation Laboratory, "La Ligue," Molecular and Cellular Genetic Center, CNRS Unite Mixte Recherche (UMR) 5534, University of Lyon, 69622 Villeurbanne, France.
まとめ
ソニック・ヘッジホッグ (Shh) 信号は,脊髄の発達に不可欠です. Unbound Patched (Ptc) は細胞死を誘発しますが,ShhがPtcに結合すると細胞の生存と分化を促進し,適切な神経管のパターンを確保します.
科学分野:
- 発達生物学 発達生物学とは
- 神経科学は神経科学である.
- 分子シグナル伝達です.
背景:
- ソニック・ヘッジホッグ (Shh) は,脊椎動物の胚発達における重要なシグナル伝達分子である.
- Shhは,神経管のパターン形成に不可欠な,腹脊椎の傾斜を確立する.
- Shhはまた,神経上皮細胞の生存に重要な役割を果たします.
研究 の 目的:
- Shh媒介細胞生存におけるPatched (Ptc) の役割を調査する.
- Shhが神経上皮細胞の運命を調節するメカニズムを解明する.
- 脊髄発達におけるPtc,Shh,およびアポトーシスの相互作用を理解する.
主な方法:
- チーク胚モデルシステム.
- 細胞死と分化マーカーの分析.
- Shh信号伝達経路の操作です.
主要な成果:
- パッチド (Ptc) は,そのリガンド,ソニック・ヘッジホッグ (Shh) の不在でアポプトシス細胞死を引き起こす.
- ShhがPtcに結合すると,このプロアポプトティック活性が抑制されます.
- Ptc誘発の細胞死を阻害することで,Shh欠乏によって引き起こされる脊髄の欠陥を部分的に救済します.
結論:
- 結合しないPtcのプロアポプトティック機能と,Shh結合したPtcの細胞分化促進効果は,脊髄の発達に極めて重要です.
- Shhシグナル伝達は,Ptcを通じて神経上皮細胞の生存と分化を調節する.
- アポトーシスと分化におけるPtcのこの二重の役割は,適切なニューラルチューブ形成に不可欠です.
関連する概念動画
Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
Apoptosis
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...

