ブラストシストの埋め込みは,白血病抑制因子の母体発現に依存しています
C L Stewart1, P Kaspar, L J Brunet
1Department of Cell and Developmental Biology, Roche Institute of Molecular Biology, Nutley, New Jersey 07110.
Nature
|September 3, 1992
まとめ
白血病阻害因子 (LIF) は,マウスにおけるブラストシストの埋め込みに不可欠です. 機能的なLIFがなければ,胚はインプラントできず,妊娠初期に不可欠な役割を強調します.
科学分野:
- 生殖生物学 生殖生物学
- 発達生物学 発達生物学とは
- 分子シグナル伝達です.
背景:
- 哺乳類の妊娠には,胚が子宮壁に付着するブラストシストの埋め込みが含まれます.
- このプロセスは,母と胚の間の複雑なホルモン相互作用によって同期されます.
- 精密な制御メカニズム,母性対胚性,インプランテーションを制御するメカニズムは,ほとんど不明のままです.
研究 の 目的:
- 白血病阻害因子 (LIF) が芽細胞移植における役割を調査する.
- LIF発現が胚の成功的な植え付けと発達に不可欠かどうかを判断する.
主な方法:
- 妊娠中の子宮内膜におけるLIF発現の分析.
- 機能的なLIF遺伝子を持たないマウスの生成と研究.
- LIF欠乏症および野生型のマウスにおけるブラストシストのインプラントと発達の評価.
- LIF欠乏体と野生型受容体間の芽細胞移植実験.
主要な成果:
- 白血病阻害因子 (LIF) は,特に妊娠4日目の胎内膜に一時的に発現し,ブラストシストの植入に先立ちます.
- 機能的なLIF遺伝子が欠けているメスマウスは肥沃であるが,そのブラストシストはインプラントに失敗する.
- これらの非インプラントブラストシストは生存可能であり,偽妊娠野生型受容体に移植されると,成功裏にインプラントされ,期間まで発達することができます.
結論:
- 白血病阻害因子 (LIF) の一時的な発現は,マウスにおけるブラストシスト移植の成功に不可欠です.
- LIFは,胚の植え付けのための子宮環境を準備するために,母性的に作用します.
- この研究では,LIFは妊娠を開始するために必要な母と胎児の対話の重要なレギュレーターであると特定しています.
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