Rac1bと活性酸素種は,MMP-3誘発EMTとゲノム不安定を媒介する
Derek C Radisky1, Dinah D Levy, Laurie E Littlepage
1Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. dcradisky@lbl.gov
Nature
|July 8, 2005
まとめ
腫瘍のマイクロ環境におけるストロメリシン-1 (MMP-3) は,乳がんの進行を促します. MMP-3は反応性酸素種 (ROS) とゲノム不安定性を誘発し,悪性変異を引き起こす.
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:
- 腫瘍マイクロ環境 (TME) は,がんの進行と腫瘍形成を促進することができます.
- ストロメリシン-1/マトリックスメタルプロテインアース-3 (MMP-3) は,ストロマル酵素であり,乳房腫瘍において上調されている.
- 以前の研究では,MMP-3が表皮質-メゼンキマ移行 (EMT) と悪性変異を誘発することを示しました.
研究 の 目的:
- MMP-3が悪性変異に寄与する分子経路の解明.
- 乳腺腫瘍のマイクロ環境内の細胞および組織構造の変化におけるMMP-3の役割を特定する.
主な方法:
- マウス乳腺上皮細胞のMMP-3への暴露.
- 遺伝子発現の分析,代替的にスプライスされたRac1とSnailを含む.
- 反応性酸素種 (ROS) レベルとDNA酸化損傷の評価.
- 乳がんにおけるゲノム不安定性の評価.
主要な成果:
- MMP-3への曝露は,Rac1の代替的にスプライスされた形態を誘発し,細胞のROSを増加させた.
- ROSの増加がスナイルの表情とEMTを刺激しました.
- MMP-3への曝露は酸化性DNA損傷とゲノム不安定をもたらした.
- これらの分子現象は,in vitroおよびin vivoにおいて悪性変異と相関していた.
結論:
- MMP-3は,乳腺TMEと悪性変異を結びつける新しい経路を開始します.
- MMP-3誘発のROSとゲノム不安定性は,がんの進行を促す重要なメカニズムです.
- MMP-3を標的とした治療は,乳がんの治療戦略となるかもしれません.
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