wnt-1および関連するタンパク質が,Xenopus胚のギャップ・ジャンクション通信に及ぼす影響
D J Olson1, J L Christian, R T Moon
1Department of Pharmacology, University of Washington, School of Medicine, Seattle 98195.
Science (New York, N.Y.)
|May 24, 1991
まとめ
Wnt-1タンパク質は,胚の発達におけるギャップ・ジャンクション・コミュニケーションを強化し,胚のパターン形成における役割を示唆している. この経路には複数のWntタンパク質受容体が関与する可能性があります.
科学分野:
- 発達生物学 発達生物学について
- セルラー通信 セルラー通信
- 分子生物学は分子生物学である.
背景:
- プロトオンコゲンwnt-1は胚のパターン形成に関与しているが,その正確なメカニズムは不明である.
- Wnt信号の理解は,発達過程の解読に不可欠です.
研究 の 目的:
- 胚の発達におけるwnt-1の役割を調査する.
- Wnt-1タンパク質がギャップ・ジャンクション通信に及ぼす影響を調査する.
- この過程におけるWnt-1関連タンパク質 (Xwnt-8とXwnt-5A) の機能を検証する.
主な方法:
- 合成のwnt-1RNAを受精したXenopus卵に注入し,Wnt-1タンパク質を過剰に発現させました.
- 発達中の胚におけるギャップ・ジャンクション通信を測定した.
- Xwnt-8とXwnt-5Aの過剰発現がギャップジャンクション通信に与える影響を評価した.
主要な成果:
- Wnt-1タンパク質の早期発現と発現の増加は,Xenopus胚の発達における腹腔細胞間のギャップ・ジャンクション通信を強化した.
- また,Xwnt-8の過剰発現は,Wnt-1と同様のギャップ・ジャンクション・カップリングを増加させた.
- Xwnt-5Aの過剰表現はギャップ・ジャンクション通信に影響を与えなかった.
結論:
- Wnt-1シグナリングはギャップジャンクション通信を調節し,胚のパターン形成におけるその役割をサポートすることができます.
- これらの発見は,Wntタンパク質が,ギャップ・ジャンクションを標的とした受容器媒介の信号伝導経路を活性化することを示唆しています.
- Xwnt-8とXwnt-5Aの異なる効果は,複数のWntタンパク質受容体の存在を示しています.
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