新しいレチノ酸受容体は,肝細胞癌から特定されました
D Benbrook1, E Lernhardt, M Pfahl
1Cancer Research Center, La Jolla Cancer Research Foundation, California 92037.
Nature
|June 16, 1988
まとめ
科学者たちは,成長や視力などのビタミンA機能に不可欠な新しいレチノ酸受容体を発見しました. この受容体は上皮組織で高度に発現し,その遺伝子は肝がんで発見され,腫瘍発達の役割を示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- エンドクリノロジー エンドクリノロジー
- 細胞生物学 細胞生物学
背景:
- ビタミンA (レチノール) とその代謝産物 (レチノイド) は,成長,視力,生殖などの重要な生理学的プロセスに不可欠です.
- レチノイドの作用の基礎となる正確な分子機構は,ほとんど未定義のままである.
- 最近,ステロイド/甲状腺ホルモン受容体スーパーファミリーに属する,重要なレチノイドであるレチノ酸の特定の核受容体が特定されました.
研究 の 目的:
- ステロイド/甲状腺ホルモン受容体ファミリー内の新しい細胞内受容体を特定し,特徴づけること.
- 新しく発見されたレチノ酸受容体の機能と発現パターンを調査する.
主な方法:
- ヒトの胎盤図書館からの補完的なDNAクローンを使用して,非特徴化された細胞内受容体の分析.
- 組織分布を決定する遺伝子発現分析.
- 肝細胞がんのサンプルにおける受容体遺伝子の識別.
主要な成果:
- 2番目のレチノ酸受容体の発見.
- この新しい受容体は,様々な上皮組織で高度に発現しています.
- この受容体の遺伝子は,B型肝炎ウイルスの統合部位に隣接する肝細胞癌で特定されました.
結論:
- 2番目のレチノ酸受容体が特定され,レチノイド信号伝達経路の理解を広げました.
- 皮質組織における受容体の高い発現は,これらの細胞タイプにおいて重要な役割を果たすことを示唆している.
- 肝がんにおけるB型肝炎ウイルスの統合と受容体遺伝子の関連性は,肝がん発症における潜在的な役割を示している.
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