アンドロゲン受容体の体内獲得強化剤は,進行性前立腺がんの非コーディング・ドライバーである
David Y Takeda1, Sándor Spisák2, Ji-Heui Seo2
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; The Eli and Edythe L. Broad Institute, Cambridge, MA 02142, USA.
Cell
|June 19, 2018
まとめ
研究者らは,前立腺がんにおける抵抗性を高める新しいアンドロゲン受容体 (AR) を発見した. この増強剤を標的とした治療は 進行した前立腺がんの新たな治療策となる可能性があります
科学分野:
- 腫瘍学
- 遺伝学
- 分子生物学
背景:
- アンドロゲン受容体 (AR) の活動は,進行した前立腺がんにおける治療抵抗性の主要な要因である.
- ARの遺伝子増幅は抵抗性の一般的なメカニズムです.
研究 の 目的:
- AR活動と治療抵抗に寄与する新しい調節要素を特定し,機能的に特徴づける.
- 前立腺がんの治療のための非コード制御要素を標的とする可能性を調査する.
主な方法:
- ゲノム編集は新たに特定されたAR増強剤を 破壊するために使われました
- 増殖測定は,異なるアンドロゲン条件とエンザルタミドの存在下で実施された.
- 前立腺の原発性腫瘍と良性標本からの表遺伝子データを分析した.
主要な成果:
- AR遺伝子の中心部に位置する体内獲得されたAR増強剤が特定されました.
- この増強剤の混乱は,ARレベルを抑制することによって,癌細胞の増殖を減少させた.
- 増強剤の追加コピーを挿入すると,特に低アンドロゲン条件下では,増殖が増加し,エンザルタミドに対する感受性が低下します.
結論:
- 特定されたAR増強剤は,前立腺がんの進行と治療抵抗を促す上で重要な役割を果たします.
- 主要腫瘍における表遺伝子分析は,耐性メカニズムを理解するために不可欠である.
- ゲノム編集は,非コーディング要素とその機能的影響を特徴づけるための貴重なツールです.
- 進行した前立腺がんの治療に 有望な脆弱性を示しています
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