Cyldは,Bcl-3依存のNF-kappaBシグナル伝達を遮断することによって,腫瘍細胞の増殖を抑制する
Ramin Massoumi1, Katarzyna Chmielarska, Katharina Hennecke
1Department of Molecular Medicine, Max Planck Institute of Biochemistry, D-82152 Martinsried, Germany.
Cell
|May 23, 2006
まとめ
CYLD遺伝子のデウビキチナゼは,異なるNF-kappaB経路を制御することによって,皮膚腫瘍の成長を調節する. CYLDの喪失は,細胞増殖に影響することで,化学的に誘発された皮膚腫瘍に対する感受性を高めます.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- 皮膚科 皮膚科について
背景:
- CYLD遺伝子の変異は,毛のケラチノサイト腫瘍と関連しています.
- CYLD遺伝子は,細胞信号伝達経路の調節に関与するデウビキチナゼ酵素をコードする.
- CYLDデウビキチナゼの活動は,TRAF2上のライシン63結合ユビキチン鎖を標的にし,p65/p50核因子-kappaB (NF-kappaB) の活性化を阻害する.
研究 の 目的:
- 化学的に誘発された皮膚腫瘍形成におけるCYLD遺伝子の役割を調査する.
- ケラチノサイトにおけるCYLDによって調節される特定のNF-kappaB経路を解明する.
- CYLDの無活性化が皮膚腫瘍の発達と増殖にどのように寄与するかを理解する.
主な方法:
- 化学的に誘発された皮膚腫瘍に対する感受性を評価するために,サイルド・ノックアウト (Cyld-/-) マウスを利用しました.
- 分析されたCyld-/-腫瘍と,12-O-テトラデカノイルホルボル-13アセテート (TPA) または超増殖とサイクリンD1レベルのための紫外線で治療されたケラチノサイト.
- Bcl-3およびNF-kappaB成分 (p50,p52) に関するCYLDの核転移およびデウビキチネーション活動を調査しました.
主要な成果:
- Cyld (Cyld-/-) が欠けていたマウスは,化学的に誘発された皮膚腫瘍に対して高い感受性を示した.
- Cyld-/-腫瘍と治療されたケラチノサイトは,過剰増殖と上昇したサイクリンD1レベルを示した.
- CYLDの無活性化により,Bcl-3に関連したNF-kappaB p50とp52の核活性が増加し,p65/p50の作用に影響を与えるのではなく,増殖を促した.
結論:
- CYLDは,外部信号に基づいて異なるNF-kappaB経路を否定的に調節する.
- CYLDによるTRAF2の不活性化は,生存と炎症に影響する.
- CYLDによるBcl-3の抑制は,細胞増殖と腫瘍の成長を制御し,皮膚腫瘍発生を予防する上でCYLDの重要な役割を強調しています.
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