NK細胞媒介の細胞毒性は,細胞静止薬の組み合わせによる腫瘍制御に貢献する
Marcus Ruscetti1, Josef Leibold1, Matthew J Bott1
1Department of Cancer Biology and Genetics, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
まとめ
MAPKとCDK4/ 6阻害剤を併用すると,老化とNK細胞の監視が誘発され,KRAS変異性肺がんでは腫瘍の回帰が起こります. この2つの作用は肺がんの治療に 新しい治療戦略をもたらします
科学分野:
- 腫瘍学
- 免疫学
- 分子生物学
背景:
- 分子標的治療は 腫瘍の成長を抑制する上で極めて重要です
- KRAS変異性肺がんは依然として重要な治療課題です.
研究 の 目的:
- KRAS変異性肺がんに対するMAPKとCDK4/ 6阻害剤の併用効果を調査する.
- この薬剤の組み合わせに対する細胞の老化とNK細胞の監視の役割を明らかにする.
主な方法:
- MAPKおよびCDK4/ 6阻害剤によるKRAS変異性肺がん細胞の治療
- 細胞老化の評価,SASPの活性化,NK細胞の活性化
- KRAS変異性肺がんマウスモデルにおける腫瘍の回帰と生存の評価
主要な成果:
- 併用治療は癌細胞の増殖を抑制し,レチノブラストーマのタンパク質媒介の衰老を誘導した.
- 衰老に関連した分泌フェノタイプ (SASP) の成分であるTNF-αとICAM-1は,NK細胞媒介による腫瘍細胞破壊に不可欠でした.
- 併用した治療は,腫瘍の回復と生存の延長をもたらした.
結論:
- 老化を誘発する標的薬は,非細胞の自律的なNK細胞監視によって腫瘍を制御することができる.
- MAPKとCDK4/ 6阻害剤を併用した治療は,KRAS変異性肺がんに対する有望な戦略である.
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