一个MYC家族开关:L-MYC驱动和维护前列腺癌中神经内分泌血统程序
bioRxiv : the preprint server for biology
|January 9, 2026
概括
通过重编程细胞和抑制AR信号,L-MYC (MYCL) 驱动神经内分泌前列腺癌 (NEPC). 这项研究揭示了NEPC中的MYC家族开关,确定L-MYC是这种攻击性癌症亚型的关键调节者.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症遗传学 癌症遗传学
背景情况:
- 神经内分泌前列腺癌 (NEPC) 是一种抗治疗的攻击性亚型.
- NEPC源于在抑制雄激素受体 (AR) 途径后的血统可塑性.
- 在此之前,MYCL (L-MYC) 在NEPC开发中的作用尚不清楚.
研究的目的:
- 调查MYCL在NEPC病变发生中的作用.
- 确定MYCL表达和神经内分泌分化之间的关系.
- 阐明MYCL在NEPC中的调节机制和功能后果.
主要方法:
- 在NEPC患者样本和细胞系中分析MYCL表达.
- 与神经内分泌和腺癌相关基因的相关性分析.
- 功能性研究涉及MYCL过度表达和敲击.
- 表观遗传景观评估和上游监管机构的识别.
主要成果:
- 在NEPC中,MYCL被选择性上调,而MYC和MYCN被下调,表明MYC家族交换机.
- MYCL表达与神经内分泌标记物 (ASCL1,INSM1) 相对应,与腺癌标记物相反.
- MYCL激活与宽容的表观遗传环境有关,而不是基因组放大.
- 过度表达MYCL促进神经内分泌重编程并抑制AR信号;MYCL倒置可以逆转这些效应.
结论:
- 在晚期前列腺癌中,MYCL充当特定于血统的调节器,驱动神经内分泌特征.
- 建立了一个保留的神经内分泌转录轴,涉及ASCL1,INSM1和MYCL.
- 在NEPC的可塑性和进展中,MYCL起着至关重要的作用.
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