細胞サイクル制限はDNAの損傷を制限し,白血病幹細胞の自己更新を維持します

Andrea Viale¹, Francesca De Franco, Annette Orleth

¹Department of Experimental Oncology at the IFOM-IEO Campus, European Institute of Oncology, IEO, 20141 Milan, Italy. andrea.viale@ifom-ieo-campus.it

Nature

|January 6, 2009

まとめ

白血病の幹細胞は,セルサイクル阻害体p21に依存して自己再生する. DNA修復を阻害することは,これらのゆっくりと成長するがん幹細胞を排除するための新しい戦略を提供します.

科学分野:

腫瘍学腫瘍学
分子生物学は分子生物学である.
血液学ヘマトロジ

背景:

珍しい幹細胞は白血病の発生と自己再生を促します.
白血病の幹細胞を維持する分子機構は十分に理解されていません.
白血病の幹細胞は,自己再生能力が向上しています.

研究の目的:

白血病幹細胞の自己再生におけるp21の役割を調査する.
白血病の幹細胞維持の基礎にある分子メカニズムを解明する.
白血病の幹細胞を標的とした潜在的な治療戦略を特定する.

主な方法:

マウスの血液形成性幹細胞 (HSC) を利用した.
白血病に関連した腫瘍遺伝子の発現を誘発する.
p21発現とDNA損傷反応を分析した.
細胞サイクル停止とDNA修復メカニズムを評価した.

主要な成果:

p21発現は白血病幹細胞の自己再生に不可欠である.
白血病の腫瘍遺伝子はDNA損傷を誘発し,p21依存の応答を活性化します.
活性化されたp21は過剰なDNA損傷と白血病幹細胞の枯渇を防ぐ.
p21は,白血病幹細胞の機能を維持することにより,腫瘍原性の役割を果たします.

結論:

p21は白血病幹細胞の自己再生を維持するために不可欠です.
DNA修復メカニズムをターゲットにすることは,白血病に対する強力な戦略である可能性があります.
p21の役割を理解することは,白血病の根絶のための新しい道を開きます.

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