肝脏特异性基因PGRMC1通过ER压力独立的PERK激活阻断c-Myc诱导的肝癌发生
Fubo Ji1,2,3, Jianjuan Zhang1,2,3, Liping Mao1,2,3
1The MOE Key Laboratory of Biosystems Homeostasis & Protection, Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
Nature communications
|January 2, 2025
概括
肝脏特异性基因 (LSGs) 在肝癌 (肝细胞癌,HCC) 中经常丢失. 减少PGRMC1,一个LSG,激活c-Myc通路,促进瘤生长和不良预后.
科学领域:
- 肝细胞癌 (HCC) 研究研究
- 分子生物学分子生物学
- 癌症遗传学 癌症遗传学
背景情况:
- 肝细胞癌 (HCC) 发生过程中肝细胞特异基因 (LSGs) 的作用尚未得到充分研究.
- 在HCC组织中,LSG经常下调,与患者不良结果和c-Myc通路激活相关.
研究的目的:
- 调查LSG在HCC发病和进展中的作用.
- 确定与c-Myc通路活动和患者预后相关的特定LSG.
- 阐明PGRMC1 (孕激素受体膜成分1) 调节HCC的机制.
主要方法:
- 在HCC与非HCC肝脏组织中LSG表达的比较分析.
- 对LSG水平,c-Myc通路激活和患者存活率之间的相关性分析.
- 在c-Myc诱导的HCC形成中研究PGRMC1的作用,使用正位素模型.
- 细胞和分子研究,以确定PGRMC1与PERK (PKR类内分泌网膜激酶) 的相互作用及其对c-Myc翻译的下游影响.
主要成果:
- 在HCC中,LSG通常下调,低表达与预后不佳和激活c-Myc信号相关.
- PGRMC1显著抑制了c-Myc驱动的HCC形成.
- PGRMC1定位在内质网膜 (ER) 膜上,并与PERK.相互作用.
- 这种相互作用独立于ER压力激活PERK,导致eIF2α酸化和抑制c-Myc转化.
- 在HCC瘤中降低PGRMC1水平与c-Myc特征负相关,并预测患者的治疗结果不佳.
结论:
- 放松管制的LSG,特别是PGRMC1,通过c-Myc通路调节参与HCC病变.
- PGRMC1通过通过ER压力独立的PERK激活来抑制c-Myc诱导的癌症发生,作为HCC中的瘤抑制剂.
- 恢复PGRMC1功能可能是HCC的治疗策略.
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