成人における拡散性膠原腫の縦断的な分子軌跡
Floris P Barthel1,2, Kevin C Johnson1, Frederick S Varn1
1The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA.
Nature
|November 22, 2019
まとめ
グリオマの進化は,再発時にドライバ遺伝子が保持され,治療法が腫瘍の発達にストキャスティックに影響を与えることを示しています. 再発性膠原腫では,既得アヌプロイド症とサブクローナル選択が,より悪い結果と相関する.
科学分野:
- 腫瘍学
- 遺伝学
- 進化生物学
背景:
- 拡散性膠原腫における治療抵抗は,重大な臨床的課題である.
- グリオマの進化動態を理解することは 効果的な治療法の開発に不可欠です
研究 の 目的:
- 初期診断から再発までの 拡散性膠原腫の進化経路を調査する.
- 遺伝子変異と選択的圧力が 膠原腫の進化と治療抵抗性を 引き起こすことを特定する.
主な方法:
- 222人の成人膠原腫患者のDNA配列解析データと臨床アノテーションの分析
- 初期段階と再発段階における変異,複製数の変化,およびクロン構造の比較分析.
- アルキル化剤を含む治療が腫瘍の進化と患者の生存に及ぼす影響の評価
主要な成果:
- 初期診断時に存在したドライバ遺伝子変異は,再発時に大きく維持された.
- アルキル化剤による治療は,ハイパーミューテーション現象を誘発したが,ハイパーミューテーションは全生存期に影響しなかった.
- 獲得したアヌプロイド症,特に1p/19q共消去なしのIDH変異性グリオマでは,細胞周期の変化と悪い結果と関連していました.
- 腫瘍進化中のサブクローン選択は生存率の低下と相関する.
結論:
- 拡散性膠原腫の選択圧力は,発達の初期に最も強い.
- 現在の治療法は 大抵 ストキャスティックな方法で グリオマの進化を形作っているようです
- これらの進化パターンを理解することは 膠原腫の治療抵抗を克服する鍵です
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