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遠隔転移は,臓がんの遺伝的進化の遅い段階で発生する
Shinichi Yachida1, Siân Jones, Ivana Bozic
1Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, Johns Hopkins Medical Institutions, Baltimore, Maryland 21231, USA.
Nature
|October 29, 2010
まとめ
臓がんの転移は,原発性腫瘍内の遺伝的に進化したクローンから生じる. 早期発見は極めて重要で,転移能力は診断の数年前に発達し,致命的な結果を防ぐための窓を提供します.
科学分野:
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
- 癌生物学 癌生物学について
背景:
- 転移は,特に臓がんでは,がんによる死亡の主な原因です.
- 臓がん患者はしばしば転移性疾患を発症し,治療に反応が悪い.
- 臓がんの予後不良 (遅い診断と早期発症) の理由は不明である.
研究 の 目的:
- 主要臓腫瘍とその転移の間のクローン関係を調査する.
- 臓がんの進行の遺伝的進化とタイミングを理解する.
- 早期発見と介入のための潜在的なウィンドウを特定する.
主な方法:
- 7つの臓がん転移のゲノムシーケンシング.
- 原発性および転移性がん細胞間のクローン関係の分析.
- 遺伝的進化のタイミングの定量分析.
主要な成果:
- 転移性クローンは,原発性腫瘍に存在しますが,転移性でないクローンから遺伝的に進化しています.
- 転移の遺伝的異質性は,原発腫瘍の異質性を反映しています.
- 初期変異と創始細胞の間に10年が経過し,転移能力はさらに5年にわたって獲得されます.
結論:
- 臓がんの進行には,転移前に原発性腫瘍内の有意な遺伝的進化が伴う.
- 早期発見にはかなりの時間窓があり,致命的な転移性疾患を予防する可能性があります.
- 遺伝的異質性を理解することは,臓がんのアウトカムを改善するための鍵です.
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