p63は,四肢の再生増殖,面および上皮の発達に不可欠です
1Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|May 5, 1999
まとめ
p63遺伝子は,上皮細胞の発達と形態変異に不可欠です. ネズミにおけるその破壊は,四肢,頭蓋骨構造の重篤な欠陥,状表 epithelia と腺の欠如につながります.
科学分野:
- 発達生物学 発達生物学とは
- 分子遺伝学 分子遺伝学
- 皮質生物学 エピセリア生物学
背景:
- 腫瘍抑制剤p53の同型であるp63遺伝子は,様々な上皮組織の基礎細胞および前身細胞に高度に発現しています.
- 皮質組織は臓器の構造と機能に不可欠であり,その適切な発達は生物の健康に不可欠である.
研究 の 目的:
- 胚の発達におけるp63遺伝子の役割,特に四肢,頭蓋骨,頭皮の形質変異を調査する.
- 機能的なp63.3の欠如で観察される発達障害の基礎となる細胞および分子メカニズムを解明する.
主な方法:
- 乱れたp63遺伝子 (p63-/-) に対して同同胞性のマウスの生成と分析.
- p63-/-胚の肢体,頭蓋骨,表皮の発達を詳細に検査する.
- 組織分化と細胞集団を評価するための組織学的分析.
主要な成果:
- p63-/-マウスは,頂上外皮を維持できないため,足肢の発達に重度の欠陥を呈し,切断を含む.
- p63-/-胚では,頭蓋骨面の発達が著しく低下しています.
- p63の欠如は,異常な表皮の分化と,乳腺,涙腺,唾液腺などの状表皮およびその派生体の完全な欠如につながります.
結論:
- p63遺伝子は,上皮細胞の発達と形態変異に必要な原始細胞集団を維持するために不可欠です.
- p63は,層状の表皮質およびその派生体の発達において重要な役割を果たし,複数の臓器系に影響を与えます.
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