変異性トランスレション合成を標的とする小分子は,化学療法を改善する
Jessica L Wojtaszek1, Nimrat Chatterjee2, Javaria Najeeb1
1Department of Biochemistry, Duke University Medical Center, Durham, NC 27710, USA.
Cell
|June 11, 2019
まとめ
研究者は,変異性転化合成 (TLS) を標的とする新しい小分子阻害剤,JH-RE-06を開発した. 薬剤耐性を阻害し,治療による変異を減らすことで, 化学療法の有効性を高めています.
科学分野:
- 腫瘍学
- 分子生物学
- 薬物の発見
背景:
- 薬剤耐性や二次悪性腫瘍は 化学療法の有効性を制限します
- 変異性転移合成 (TLS) は化学抵抗性および治療による変異を促進する.
- TLSをターゲットにすることは 化学療法改善の有望な戦略ですが 特定の阻害剤の開発は困難です
研究 の 目的:
- 変異性TLSを標的とした新しい小分子阻害剤を発見し特徴づけること.
- 臨床前がんモデルにおける抑制剤の有効性を評価する.
主な方法:
- 変異性TLSの小分子阻害剤であるJH-RE-06の発見
- REV1とPOL ζの相互作用に焦点を当てたJH-RE-06の作用機構の調査.
- 変異性TLSを in vitro で抑制するJH-RE-06の能力の評価
- 細胞系におけるシスプラチン誘発性毒性に対するJH-RE-06の効果の評価
- 異種移植のヒトメラノーママウスモデルでシスプラチンと併用したJH-RE-06の有効性を試験する.
主要な成果:
- JH-RE-06は,変異性 POL ζの増殖を防ぐことで変異性 TLSを阻害する.
- 阻害剤はREV1に結合し,二重化を引き起こし,REV1- REV7の相互作用を阻害する.
- JH- RE-06は変異性TLSを阻害し,ヒトとマウスの細胞系におけるシスプラチン誘発の毒性を強化する.
- JH- RE-06とシスプラチンの併用は,マウスにおける異種移植メラノーマの増殖を抑制した.
結論:
- JH- RE-06は,変異性TLSの強力な阻害剤であり,in vivoで有効である.
- この研究は,新しい化学療法補助剤としてTLS阻害剤の開発の枠組みを確立します.
- ターゲティングTLSは 化学抵抗を克服し 癌治療の成果を向上させる 有望な戦略です
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