サイクリンD1は,網膜と乳房の発達と腫瘍発生の間のリンクを提供します
P Sicinski1, J L Donaher, S B Parker
1Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, USA.
Cell
|August 25, 1995
まとめ
細胞循環の重要なレギュレータであるサイクリンD1が欠けているマウスは,神経学的障害や生存能力の低下を含む発達上の問題を発現します. これは,細胞増殖,特に網膜と乳腺におけるサイクリンD1の重要な役割を強調しています.
科学分野:
- 発達生物学 発達生物学とは
- 細胞サイクル調節 細胞サイクル調節
- 分子遺伝学 分子遺伝学
背景:
- サイクリンD1は,細胞周期の重要な調節体であり,G1段階を通過する進行を制御します.
- 組織発育と特定の臓器系におけるその正確な役割については,さらなる解明が必要である.
- 遺伝子ターゲティングは,特定の遺伝子のインビボ機能を調査するための強力なツールを提供します.
研究 の 目的:
- マウスにおけるサイクリンD1欠乏の生理学的および発達的影響を調査する.
- 網膜と乳腺を含む特定の組織の増殖におけるサイクリンD1の役割を決定する.
- 乳腺の発達におけるサイクリンD1とステロイドホルモンシグナル伝達との関係を調査する.
主な方法:
- 胚性幹細胞を標的とする遺伝子は,サイクリンD1欠乏したマウスを生成します.
- サイクリンD1欠乏性の動物のフェノタイプ分析,体サイズ,生存能力,神経機能の評価を含む.
- 細胞数と増殖能力を評価するために網膜の組織学的検査.
- サイクリンD1の発現パターンを正常なマウスの胚で決定するために,in situハイブリダイゼーションを行う.
- 妊娠中の成人変異種メスの乳腺発達の分析.
主要な成果:
- サイクリンD1欠乏症のマウスは生存可能だったが,体格の縮小,生存能力の低下,神経学的欠陥を示した.
- 胚増殖の障害により網膜細胞数が著しく減少し,正常な網膜における高いサイクリンD1発現と相関していた.
- 成人女性ミュータントは,正常な卵巣ステロイドホルモンレベルにもかかわらず,妊娠中に乳腺上皮増殖の失敗を示した.
- これらの発見は,ステロイド誘発の乳腺増殖を媒介するサイクリンD1の重要な役割を示唆しています.
結論:
- サイクリンD1は正常な胚の発達,特に網膜の細胞増殖に不可欠です.
- 網膜は,適切な発達のためにサイクリンD1に特化した依存性を示す.
- サイクリンD1は,妊娠中の乳腺上皮におけるステロイドホルモン誘発の増殖の重要な媒介として作用する.
- サイクリンD1を標的にすることは,異常な細胞増殖を含む状態のための治療戦略を提供することができる.
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Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
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