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来自IMPA1的伊诺西托尔通过IMPDH2激活来维持割抵抗性前列腺癌的干性
Che-Chia Hsu1,2, Guihua Wang2, Chien-Feng Li3
1Department of Pathology, Duke University Medical Center, Duke University School of Medicine, Durham, NC, USA.
The Journal of experimental medicine
|October 29, 2024
概括
由IMPA1产生的内醇为前列腺癌干细胞 (PCSCs) 提供燃料,并驱动对雄激素切除疗法 (ABT) 的耐药性. 向IMPA1/inositol/IMPDH2通路可以阻止割抵抗性前列腺癌 (CRPC) 的进展.
科学领域:
- 代谢学 代谢学 代谢学
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 前列腺癌干细胞 (PCSCs) 驱动了抵抗割的前列腺癌 (CRPC) 和对雄激素切除疗法 (ABT) 的抵抗.
- 调节PCSC维持和CRPC进展的特定代谢物仍然在很大程度上是未知的.
研究的目的:
- 为了确定参与在ABT期间PCSC维护的关键代谢物.
- 阐明伊诺西及其代谢途径在CRPC进展和ABT耐药性中的作用.
主要方法:
- 在老鼠前列腺中有条件的Impa1敲击.
- 对PCSC池和物业进行分析.
- 使用TRAMP小鼠,CRPC外移植和患者衍生外移植 (PDX) 模型的体内研究.
- 在IMPA1/inositol/IMPDH2轴上的遗传和药理向.
主要成果:
- 来自IMPA1的内醇富含PCSCs,对其维持和CRPC进展至关重要.
- 有条件的Impa1淘汰会减少PCSCs,停止CRPC,并延长TRAMP小鼠的生存时间.
- 伊诺西托尔激活IMPDH2,合成为ARlow/-PCSCs必不可少的酸核酸,驱动CRPC和ABT耐药性.
- 在人类前列腺癌中,IMPA1/inositol/IMPDH2轴上调,与生存率差相关.
- 针对这一轴取消了CRPC,并在临床前模型中克服了ABT抵抗.
结论:
- IMPDH2充当异醇传感器,其被异醇激活是维持PCSCsCRPC和ABT耐药性的关键机制.
- IMPA1/inositol/IMPDH2通路是克服CRPC和ABT耐药性的有希望的治疗标.
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