DNA脱メチル化剤は,内生トランスクリプトによるウイルスミミクリを誘導することによって,結腸直腸がん細胞を標的とする
David Roulois1, Helen Loo Yau2, Rajat Singhania1
1Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 2M9, Canada.
Cell
|August 29, 2015
まとめ
低用量5-AZA-CdRは,ウイルスミミクリを誘発することによって,大腸がん発症細胞 (CIC) を標的とする. これはMDA5/MAVS/IRF7経路を活性化し,大腸がんの新たな治療戦略を提供します.
科学分野:
- 腫瘍学
- 分子生物学
- 免疫学
背景:
- DNA脱メチル化剤は不明なメカニズムによって抗腫瘍効果を示します.
- 大腸がん発症細胞 (CIC) は腫瘍の成長と再発に不可欠です.
研究 の 目的:
- 小腸がんにおける低用量5-AZA-CdRの作用メカニズムを解明する.
- 5- AZA- CdRの有効性におけるウイルス模倣とRNA認識経路の役割を調査する.
主な方法:
- 大腸がん細胞における実験的および生物情報学的分析.
- CIC,dsRNA誘導,およびMDA5/MAVS/IRF7経路に対する5-AZA-CdRの影響を調査した.
- 主要な経路成分 (MDA5,MAVS,IRF7) とdsRNAトランスフェクション実験の障害
主要な成果:
- 低用量5-AZA-CdRは,大腸内CICにおけるウイルスミミクリを誘発する.
- MDA5/MAVS/IRF7経路を活性化する,内生レトロウイルス要素からdsRNAの生成を伴う.
- この経路を遮断すると,CICに対する5-AZA-CdRの標的と,長期的な成長阻害が廃止されます.
結論:
- DNA脱甲基剤の抗腫瘍メカニズムは,ウイルスミミクリを誘導し,MDA5 / MAVS / IRF7経路を活性化することを含む.
- この経路は,大腸内CICに対する5-AZA-CdRの有効性にとって極めて重要です.
- MDA5 / MAVS / IRF7経路は,大腸がん治療の潜在的な治療目標です.
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