肺がん治療のパーソナライゼーションにおける遺伝学とバイオマーカー
Rafael Rosell1, Trever G Bivona, Niki Karachaliou
1Catalan Institute of Oncology Badalona, Spain. rrosell@iconcologia.net
Lancet (London, England)
|August 27, 2013
まとめ
非小細胞肺がん (NSCLC) の標的治療は有望だが,しばしば短命である. EGFR Thr790Met変異やAXL過剰発現のような耐性メカニズムを理解することは,効果的な組み合わせ治療の開発の鍵です.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 非小細胞肺がん (NSCLC) は,転移段階に頻繁に現れ,平均生存期間はわずか1年です.
- Epidermal成長因子受容体 (EGFR) ドライバー変異は,肺アデノカルシノーマのサブセットにおける主要な腫瘍発生イベントであり,標的治療を可能にします.
- EGFRチロシンキナーゼ阻害剤 (TKI) は約60%の患者で寛解を誘発しますが,反応はしばしば一時的です.
研究 の 目的:
- EGFR変異性非小細胞肺癌におけるEGFRチロシンキナーゼ阻害剤に対する耐性のメカニズムを調査する.
- 治療抵抗性を克服するための新しいバイオマーカーと潜在的な組み合わせ治療法を特定する.
主な方法:
- 前存在したEGFRThr790Met変異の分析が,一時的な反応の潜在的な原動力として.
- TKI抵抗性の特徴として,AXL過剰表現とMED12機能の調査.
- 抵抗メカニズムとしての信号経路のクロストークの探索.
主要な成果:
- EGFRのThr790Met変異は,TKIに対する短期的な反応に寄与する可能性があります.
- AXLの過剰発現とMED12機能の低下は,EGFR変異性NSCLCにおけるTKIsに対する耐性に関連しています.
- 信号経路の交響は,抵抗のもう一つの重要なメカニズムを表しています.
結論:
- 耐性経路に関与する分子成分を特定することは,組み合わせ治療法の開発を導くことができます.
- EGFR TKI モノセラピーではなく,複数の分子をコターゲティングすることで,治療結果を改善することがあります.
- シリアルリバイオプシの深層配列化は,新しいバイオマーカーを特定する可能性を秘めています.
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