XPO1に依存する核の輸出は,KRAS変異性肺がんにおける薬剤可能な脆弱性である
Jimi Kim1, Elizabeth McMillan1, Hyun Seok Kim2
1Department of Cell Biology, UTSW Medical Center, Dallas, Texas 75390, USA.
Nature
|September 30, 2016
まとめ
KRAS変異性肺がんの 核輸出をターゲットにすると 望ましい結果が出ています XPO1 (エクスポートイン1) を阻害することは,選択された患者でYAP1- TEAD阻害剤による抵抗を克服する合成- 致死的な戦略を提供します.
科学分野:
- 腫瘍学
- 分子生物学
- 薬物の発見
背景:
- 腫瘍性KRAS変異は致死性がんを誘発しますが,腫瘍の異質性と耐性により治療開発が困難です.
- KRASによるがんを標的とするには,様々なメカニズムを理解し,合成-致死性相互作用と薬剤耐性の限界を克服する必要があります.
研究 の 目的:
- KRAS変異性非小細胞肺がん (NSCLC) 細胞の特定の脆弱性を特定する.
- KRAS主導の癌における核輸送の役割を調査し,XPO1の治療標的を評価する.
主な方法:
- 106のヒトNSCLC細胞系と39,760の短い干渉RNAプールを用いたマルチゲノムデータベースのアプローチです.
- 4,725の生物学的プロセスを調査し,KRAS変異細胞の生存に不可欠なものを発見しました.
- 核輸出受容体XPO1 (CRM1とも呼ばれる) の化学阻害と,FSTL5とYAP1を含む抵抗メカニズムの分析.
主要な成果:
- 核輸送機構は,KRAS変異細胞生存の重要な差異因子として特定されました.
- IκBα核の蓄積とNFκBの阻害によって媒介された,XPO1の化学的混乱は,腫瘍性KRASとの合成-致死相互作用を明らかにした.
- FSTL5変異はYAP1の活性化によって内在的な耐性を引き起こすが,約17%のKRAS変異性肺がんではYAP1- TEAD阻害剤によって克服できる.
結論:
- 臨床的に利用可能なXPO1阻害剤は,KRAS変異性肺がん患者の有意なサブセットのための有望な治療戦略を表しています.
- 耐性を克服し,治療の有効性を最大化するために,ゲノムによる患者選択とYAP1- TEAD阻害剤による併用療法が不可欠です.
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