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Disorders of Erythrocytes
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B細胞由来リンパ毒素は,カストレーション耐性前立腺がんを促進する
Massimo Ammirante1, Jun-Li Luo, Sergei Grivennikov
1Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology and Cancer Center, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0723, USA.
Nature
|March 12, 2010
まとめ
前立腺がん (CaP) のアンドロゲン除去は炎症を誘発し,ホルモン独立のCaP細胞生存と成長を促進する経路を活性化します. この炎症を理解することは,カストレーション耐性CAPに対する新しい治療法の鍵です.
科学分野:
- 腫瘍学 腫瘍学
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
背景:
- 前立腺がん (CaP) の進行にはアンドロゲン依存性があり,カストレーション耐性CaP (CRPC) は死亡の主な原因である.
- アンドロゲンアブレーションが主要な治療法である一方で,CRPCは数ヶ月以内に出現し,そのメカニズムはほとんど理解されていません.
- CRPCの発達と進行における炎症の役割は,広く研究されていない.
研究 の 目的:
- カストレーション耐性前立腺がんの発症における炎症の役割を調査する.
- アンドロゲンアブレーションが炎症反応とCaP細胞生存に影響を与える分子メカニズムを解明する.
- CRPCを駆動する炎症経路内の潜在的な治療標的を特定する.
主な方法:
- 進行中のCaPの炎症性浸透の分析とアンドロゲンアブレーション後の分析.
- 炎症性およびCaP細胞におけるIkappaBキナーゼ (IKK) -βおよびNF-kappaBシグナル伝達に関する調査.
- CaP細胞における IKK-αとSTAT3経路のサイトカイン生成と活性化の評価.
主要な成果:
- アンドロゲン依存性CaPにおけるアンドロゲンアブレーションは,B細胞を含む白血球の浸透につながる.
- 白血球におけるIKK-βの活性化により,サイトカインの産生が生じます.
- これらのサイトカインは,CAP細胞のIKK-alphaとSTAT3を活性化し,ホルモンなしの生存を促進します.
結論:
- 炎症,特に白血球の浸透とIKK-β/サイトカイン/IKK-α/STAT3軸の活性化が,カストレーション耐性前立腺がんの促進に重要な役割を果たします.
- アンドロゲンアブレーションは,CAP細胞のプロ生存性炎症経路を無意識に誘発することがあります.
- これらの炎症に起因する経路をターゲットにすることで,CRPCに対する新しい治療戦略を提供することができます.
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