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Double Whole Mount in situ Hybridization of Early Chick Embryos
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鶏の胚形成における左-右非対称性を決定する分子経路
M Levin1, R L Johnson, C D Stern
1Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA.
Cell
|September 8, 1995
まとめ
研究者らは,鶏の胚における左-右非対称性を決定する分子カスケードを特定した. Sonic hedgehog (Shh) のような重要な遺伝子は非対称的な発現を示し,臓器の発達に影響を与え,体の軸を確立します.
科学分野:
- 発達生物学 発達生物学とは
- 胚形成とは,胚の形成である.
- 分子遺伝学 分子遺伝学
背景:
- 初期の胚の軸の仕様 (前後,背中腹) はよく理解されています.
- 動物の形態変異における左-右 (LR) 非対称性の細胞および分子的基礎は,ほとんど不明のままである.
研究 の 目的:
- チキン胚の発達における左-右 (LR) 非対称性の基礎にある分子機構を調査する.
- LR差異の確立に関与する重要な遺伝子とその発現パターンを特定する.
主な方法:
- チキン胚におけるアクティビン受容体IIa,Sonic hedgehog (Shh),cNR-1の発現パターンを調べました.
- ガストルレーション中のおよび後の遺伝子相互作用を分析した.
- 操作されたアクティビンタンパク質とShh発現は,心臓のサイトへの影響を観察するために.
主要な成果:
- ガストルーレーション中のおよび後のアクティビン受容体IIa,Shh,cNR-1の非対称的な発現を特定しました.
- これらの遺伝子の間の連続的な規制経路を示した.
- アクティビンの変化やShhの側面が心臓部に影響を及ぼし,LRの決定におけるその役割を確認することが示されました.
結論:
- アクティビン受容体IIa,Shh,cNR-1を含む分子非対称性のカスケードは,鶏の胚における形態学的LR非対称性を決定する.
- この経路は,開発中に基本的なボディプランの非対称性を確立するために不可欠です.
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