治療によって誘発された腫瘍シクレトームは,耐性を促進し,腫瘍の進行を促します
Anna C Obenauf1, Yilong Zou2, Andrew L Ji1
1Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.
Nature
|March 26, 2015
まとめ
ターゲットを絞ったがん治療は,皮肉にも,分泌された信号を通して薬剤耐性細胞の成長を促すことができます. RAFとPI3K/AKT/mTOR経路を標的とした組み合わせ療法により,この抵抗を克服し,腫瘍の再発を予防することができます.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- がん研究 がん研究
背景:
- 薬剤耐性は,がんにおける標的型キナーゼ阻害剤の有効性を制限する.
- 標的治療は,がん細胞の複雑な信号ネットワークを誘導することができます.
研究 の 目的:
- 癌細胞の秘密細胞にキナーゼ阻害剤の影響を調査する.
- 治療によって誘発されたシクレトームが,薬剤耐性および敏感な癌細胞にどのように影響するかを決定する.
- 薬剤耐性を克服するための治療戦略を特定する.
主な方法:
- ヒトおよびマウスのメラノーマおよび肺腺癌細胞の治療には,キナーゼ阻害剤 (BRAF,ALK,EGFR) を使用する.
- 薬物ストレスを受けたがん細胞によって生成されるセクレトームの分析.
- 薬剤耐性メラノーマ細胞のインサイトトランスクリプトーム分析.
- RAFとPI3K/AKT/mTOR経路を標的とした組み合わせ療法の評価.
主要な成果:
- キナーゼ阻害剤は,薬剤耐性クローンの拡大と転移をサポートする腫瘍促進性シクレトームを誘導する.
- メラノーマにおけるヴェムラフェニブ誘発分泌は,FRA1のダウンレギュレーションによって引き起こされる.
- 薬剤耐性メラノーマ細胞は,AKT経路の過活性化を示しています.
- RAFとPI3K/AKT/mTOR阻害剤を併用した治療は,BRAF変異性メラノーマにおける薬剤耐性細胞の増殖を減少させた.
結論:
- 腫瘍誘発因子の治療的阻害は,がん細胞の秘密体を変化させ,腫瘍を誘発する微小環境を生み出します.
- この微環境は,逆説的に薬剤耐性クローンの拡大を支えている.
- 重要なシグナル伝達経路を標的とした組み合わせ療法により,腫瘍の再発と抵抗と戦う戦略が提供されます.
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