代谢酶 PFKFB4 激活转录协活性剂 SRC-3 驱动乳腺癌
Subhamoy Dasgupta1,2, Kimal Rajapakshe3, Bokai Zhu3
1Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA. subhamoy.dasgupta@roswellpark.org.
Nature
|April 5, 2018
概括
代谢酶PFKFB4激活致癌的SRC-3,将糖代谢与转录性变化联系起来,这些变化推动了侵袭性乳腺癌的生长和转移. 这一发现揭示了转移性瘤的新疗法.
科学领域:
- 生物化学
- 分子生物学
- 癌症研究
背景情况:
- 癌细胞表现出改变的新陈代谢和转录程序以支持扩散和转移.
- 在癌症中代谢重编程和转录调节之间的相互作用仍然不完全理解.
研究的目的:
- 阐明癌症中代谢重编程和转录调节之间的机制.
- 确定瘤转录程序的关键调节者.
- 研究6-果-2-激酶/果糖-2,6-双酸酶4 (PFKFB4) 在癌症进展中的作用.
主要方法:
- 全基因组RNA干扰选以确定调节SRC-3活动的基因酶.
- 对SRC-3的化位点分析.
- 评估葡萄糖流和 purin 合成途径.
- 同免疫沉和染色体免疫沉试验.
- 使用乳腺癌转移的小鼠模型进行体内研究.
- 在患者瘤样本中分析PFKFB4和SRC-3水平的相关性.
主要成果:
- PFKFB4被确定为瘤类固醇受体-3 (SRC-3) 的关键激活剂.
- PFKFB4在857级化SRC-3,增强其转录活性,促进葡萄糖流向酸盐通路和 purin合成.
- 通过PFKFB4调节的SRC-3可调节转基因酶表达并与ATF4相互作用.
- 移除PFKFB4或SRC-3或使用非化SRC-3突变体,抑制乳腺瘤生长和转移.
- 在雌激素受体阳性和基底类乳腺癌患者中,增加的PFKFB4和化SRC-3水平与生存率差相关.
结论:
- PFKFB4 在细胞糖代谢和通过SRC-3的转录激活之间起着关键作用.
- 通过PFKFB4的SRC-3激活促进了瘤的侵袭性生长和转移.
- 针对PFKFB4-SRC-3轴是转移性乳腺癌的潜在治疗策略.
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