血清饥饿使雌激素受体通过组织素低乙化信号沉默
Albert M Li1,2, Bo He1, Dimitris Karagiannis3
1Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305.
概括
血清饥饿通过破坏葡萄糖代谢和表观遗传修饰,损害了乳腺癌中的雌激素受体信号传递. 这种代谢压力降低了基因素乙化,影响了ERα表达和癌症进展.
科学领域:
- * 分子生物学 * 分子生物学
- * 癌症代谢 * 癌症代谢
- * 表观遗传学 是一种表观遗传学.
背景情况:
- *雌激素受体 (ER) 通路活性对于乳腺癌的进展至关重要.
- *ER信号的丧失可以推动瘤的进展,但根本的机制尚未完全理解.
- *代谢性压力,如血清饥饿,在乳腺瘤中很普遍.
研究的目的:
- * 为了研究血清素饥饿如何影响雌激素受体α (ERα) 在乳腺癌中的信号传递.
- *阐明连接血清代谢,葡萄糖流量和ERα的表观遗传调节的分子机制.
- * 确定维持乳腺癌中ER信号的潜在治疗点.
主要方法:
- *采用同位素追踪和时间解析代谢分析.
- *测量了基因组乙化水平,特别是H3K27ac.
- *评估了ER途径组件和相关代谢酶 (例如SLC25A1) 的基因表达.
主要成果:
- * 血清饥饿通过改变葡萄糖代谢和表观遗传学来抑制ERα信号传递.
- * 血清对于通过糖解和TCA循环维持葡萄糖流来产生乙-CoA至关重要.
- * 血清限制降低了H3K27ac在ER通路基因促进体,包括ESR1*,并损害了ERα的表达.
- *抑制SLC25A1模仿了血清饥饿效应,而酸盐补充恢复了ERα信号传递.
结论:
- * 氨酸在通过乙-CoA代谢维持ER信号传递方面发挥着至关重要的作用.
- * 血清饥饿通过限制激素乙化来破坏表观遗传场景,从而抑制ERα活性.
- * 向血清代谢或乙-CoA通路可能为ER阳性乳腺癌提供新的治疗策略.
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