p53の成長抑制および腫瘍抑制機能は,CD44発現の抑制に依存しています
Samuel Godar1, Tan A Ince, George W Bell
1Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.
Cell
|July 11, 2008
まとめ
腫瘍抑制タンパク質p53は,ストレス下でのCD44発現を抑制する. p53機能の喪失は,CD44レベルを高めることで腫瘍の成長を促し,CD44を腫瘍プロモーターとして強調します.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- 腫瘍学 腫瘍学
背景:
- P53腫瘍抑制剤は,細胞のストレス反応に不可欠です.
- CD44は細胞表面分子で,細胞の結合と移動に関与する.
- p53とCD44の調節不良は,がんの発症に関与している.
研究 の 目的:
- p53とCD44の発現の間の規制関係を調査する.
- p53欠乏性腫瘍細胞におけるCD44の役割を決定する.
- がんの進行におけるこの相互作用の影響を調査する.
主な方法:
- CD44プロモーターに結合するp53の分析.
- 異なるp53機能を持つ細胞におけるCD44発現の測定.
- 細胞成長と腫瘍発起能力の評価.
主要な成果:
- p53は,プロモーターと結合することで,CD44発現を直接抑制する.
- p53機能の喪失は,CD44発現の増加につながります.
- 増加したCD44は,p53-欠乏性乳がん腫瘍細胞の成長に不可欠です.
- CD44の発現は,p53のパラログであるp63によって正調節される.
結論:
- CD44は,p53.3が欠けている細胞における腫瘍プロモーターとして作用する.
- p53の不活性化とCD44の脱圧が続くと,悪性前細胞の生存が促進される可能性があります.
- CD44を標的にすることは,p53-変異がんの治療戦略である可能性があります.
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