ノダル関連遺伝子は,スペーマンのオーガナイザー内の物理的および機能的領域を定義します
W C Smith1, R McKendry, S Ribisi
1Department of Molecular and Cell Biology University of California, Berkeley 94720, USA.
Cell
|July 14, 1995
まとめ
TGF-βスーパーファミリーのメンバーであるXenopus nodal-related 3 (Xnr3) は,背部の発達における役割のために特定されました. Xnr3は変形を促し,腹部のメソデルマの筋肉を誘導することによって,ガストルラをパターン化します.
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.
- 細胞生物学 細胞生物学
背景:
- スペマン・オーガナイザーは,クセノプスの胚の背部の発達に不可欠です.
- ガストルーレーションとモルフォゲネシスを支配する分子機構を理解することは不可欠です.
研究 の 目的:
- 腹部化Xenopus胚の背部の発達を救える遺伝子製品を特定する.
- Xenopus nodal-related 3 (Xnr3) の機能と発現を特徴づけること.
主な方法:
- ベントラライズされたXenopus胚における遺伝子製品の機能的スクリーニング.
- クセノプス胚のマイクロインジェクションと発達結果の分析.
- ガストルレーション中のスペーマンのオーガナイザーにおけるXnr3の発現分析.
主要な成果:
- TGF-βスーパーファミリーのメンバーであるXenopus nodal-related 3 (Xnr3) が特定されました.
- Xnr3は, gastrulation 中の Spemann オーガナイザーの上皮層で発現します.
- Xnr3は,ノギンに似た,腹部のメソデームのエクスペラントの筋肉を誘発する.
- Xnr3の注射はチューブ状の組織突起を引き起こし,形態発生の役割を示唆する.
結論:
- Xnr3は, gastrula のパターンを形成し,形態遺伝的動きを調整する役割を担っています.
- 観察された突起は,Xnr3がガストルレーション中に組織形態変異を積極的に促進することを示しています.
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