サーピンは,がん細胞の生存を促進し,脳転移における血管コオプションを促進します
Manuel Valiente1, Anna C Obenauf1, Xin Jin1
1Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Cell
|March 4, 2014
まとめ
脳の脳は,脳である.
科学分野:
- 腫瘍学 腫瘍学
- 神経科学は神経科学である.
- バイオケミストリー バイオケミストリー
背景:
- 脳転移は,癌細胞死亡のメカニズムが十分に理解されていない癌の重症合併症です.
- 脳に浸透した癌細胞は,通常その死につながる未知の要因に直面します.
研究 の 目的:
- 転移した癌細胞に対する脳の防衛機構を特定する.
- 脳転移中の癌細胞におけるプラズミノゲン活性化剤 (PA) 阻害性サーピンの役割を明らかにする.
主な方法:
- 脳ストロマの成分と浸透した癌細胞の相互作用を研究した.
- 肺癌と乳癌による脳転移細胞におけるサーピンの発現を分析した.
- 脳マイクロ環境におけるアストロサイト性FasLとL1CAMに対するプラズミンの効果を調べた.
主要な成果:
- 脳のストロマから派生したプラズミンは,脳転移に対する防御として作用します.
- プラズミンは,アストロサイト性FasL経由で癌細胞死を誘発し,L1CAM媒介の拡散を抑制することによって転移を抑制します.
- 癌細胞は,プラズミンの抑制効果を回避するために,抗PAセルピン (神経セルピン,セルピンB2) を発現する.
- Anti-PAサーピンは,癌細胞を死亡信号から保護し,血管協調を促進し,脳転移を促進します.
結論:
- プラズミンは,癌の転移に対する脳の先天的な防御の重要な構成要素です.
- 癌細胞は,プラズミン媒介抑制を克服するために,抗PAサーピンを盾として利用します.
- このメカニズムは,肺がんや乳がんにおける脳転移の開始について,統一的な説明を提供している.
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