酸化されたG四重複体の形成と機能をピレーン改変ガニン経路によって回復する
Shuntaro Takahashi, Ki Tae Kim1, Peter Podbevšek2
1Department of Chemistry, Division of Advanced Materials Science , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Republic of Korea.
Journal of the American Chemical Society
|April 3, 2018
まとめ
G四重複 (G4) 構造におけるグアニンの酸化性DNA損傷は,がんを促す可能性があります. G4機能を回復し,がん治療の可能性を示しています.
科学分野:
- 分子生物学
- 化学生物学
- 遺伝学
背景:
- 酸化はしばしばDNA,特にグアニン塩基を損傷します.
- G-四重複 (G4) 構造内のグアニン塩基は酸化され,8-オクソ-7,8-ジヒドログアニン (8-オクソG) を形成する.
- 酸化したG4は遺伝子調節を妨害し,がんの進行に寄与する可能性があります.
研究 の 目的:
- G4の形成と機能に対する8-oxoGの組み込みの影響を調査する.
- 酸化したG4の機能を回復するための化学的戦略を開発する.
主な方法:
- 人間の血管内皮成長因子 (VEGF) 遺伝子プロモーターから8oxoGを含むG4構造を合成し,特徴づけました.
- 酸化VEGF G4のトポロジカルな差異と機能的影響 (複製の停止,ヌクレオリン結合) を評価した.
- 酸化したグアニン経路を代替し,G4機能を回復させるため,ピレン改変オリゴヌクレオチドを開発し,試験した.
主要な成果:
- 8oxoGを含むVEGF G4は,酸化されていないG4と比較して変異したトポロジーを示した.
- 酸化したVEGF G4は複製を止めることができず,ヌクレオリンによって安定させられませんでした.
- ピレン改変オリゴヌクレオチドは,酸化したG4の複製停止とヌクレオリン安定化を成功裏に回復させた.
結論:
- 酸化したG4は 生物学的機能の障害を示します
- ピレン改変オリゴヌクレオチド戦略は,酸化したG4sの機能を効果的に復元できます.
- このアプローチはG4構造を標的とした 新種のがん治療法の開発に期待されます
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