エストラディオールの強力な抗ドーパミン作用は,プロラクチン放出に対して,下垂体レベルでのエストラディオールの強力な抗ドーパミン作用がある
まとめ
エストラディオールは,ネズミの垂体腺細胞におけるプロラクチン放出のドーパミンアゴニスト抑制を逆転させた. これは,外周ホルモンがドーパミンに直接干渉することを示唆しています.
科学分野:
- エンドクリノロジー エンドクリノロジー
- 神経内分泌学の神経内分泌学
- 細胞生物学 細胞生物学
背景:
- ドーパミンアゴニストは,プロラクチン分泌を阻害する.
- プロラクチン放出は複雑なホルモン相互作用によって調節される.
研究 の 目的:
- ドーパミン媒介によるプロラクチン抑制に対する17β-エストラディオルの直接的な効果を調査する.
- ドーパミナージックコントロールのモデルとして,下垂体細胞培養の可能性を調査する.
主な方法:
- 主要なネズミの前部 pituitary 細胞培養が使用されました.
- 細胞は17β-エストラジオールで予備インキュベーションされた.
- ドーパミンアゴニスト (ダイヒドロエルゴコーニン,RU 24213) のプロラクチン放出に対する効果を測定した.
主要な成果:
- 17β-エストラディオールは,ドーパミンアゴニストの抑制効果をほぼ完全に逆転させました.
- この逆転は,基礎およびチロトロピン放出ホルモン誘発プロラクチン放出の両方において発生しました.
結論:
- 周辺ホルモン17β-エストラディオルは,下垂体細胞に対するドーパミンの作用に直接干渉する.
- ネズミの甲状腺細胞の原発培養は,プロラクチン分泌のドーパミン作用による制御を研究するための実用的なモデルを提供します.
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