DNA 損傷とポリー ((ADP-リボス) ポリメラーゼ-1によって誘発される細胞死を媒介する核酶
Yingfei Wang1,2,3,4, Ran An5,2,6, George K Umanah5,2
1Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. tdawson@jhmi.edu vdawson1@jhmi.edu yingfei.wang@utsouthwestern.edu.
Science (New York, N.Y.)
|November 16, 2016
まとめ
マクロファージ移動阻害因子 (MIF) はPARP-1依存核酶として作用し,DNAを分裂させ,細胞死を引き起こす. MIFを阻害する
科学分野:
- 分子生物学
- 細胞 死 の 仕組み
- 神経科学
背景:
- ポリ ((ADP-リボース) ポリメラーゼ-1 (PARP-1) 抑制は,有毒な損傷から臓器を保護する.
- PARP-1に依存する細胞死には,アポトーシス誘発因子 (AIF) の転位とDNAの断片化が含まれます.
- PARP-1媒介による細胞死亡の正確な分子メカニズムについては,さらなる解明が必要である.
研究 の 目的:
- PARP-1に依存する細胞死に関与する分子プレーヤーを特定する.
- この過程におけるマクロファージ移動阻害因子 (MIF) の役割を調査する.
- 過剰なPARP-1活性化を含む疾患の潜在的治療標的を調査する.
主な方法:
- PARP-1依存型AIF関連核酶 (PAAN) としてMIFを識別する.
- MIFの枯渇とAIF-MIFの相互作用の障害による細胞死への影響を評価する.
- グルタミン酸興奮毒性および焦点脳卒中モデルを in vivo で利用する.
主要な成果:
- MIFはPARP-1依存クロマチノリシスに不可欠な核酵素であると特定された.
- AIFはMIFの核募集を仲介し,その後ゲノムDNAを分割します.
- エクシト毒性および脳卒中のモデルでは,MIF核酵素の活性抑制により細胞死が防止されました.
結論:
- MIFはPARP-1依存細胞死経路における重要な核酶として機能する.
- AIF-MIFの相互作用は,DNAの分裂とその後の細胞死亡に不可欠です.
- 過剰なPARP-1活性化状態に対する有望な治療戦略です.
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