阻断PCSK9通过降低FLI1介导的SPP1和PD-L1表达来抑制肝细胞癌免疫逃生
Changpeng Hu1, Ming Qin1, Wenjing Lai1
1Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, Chongqing, China.
Journal for immunotherapy of cancer
|November 28, 2025
概括
蛋白转化酶亚素/素9型 (PCSK9) 通过上调SPP1和PD-L1.1,促进肝细胞癌 (HCC) 免疫逃生. 用CRISPR或小分子抑制PCSK9可以增强T细胞对HCC的活性.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 蛋白转化酶亚素/素9型 (PCSK9) 是一种免疫抑制调节剂.
- PCSK9促进肝细胞癌 (HCC) 免疫逃脱的机制尚未完全理解.
研究的目的:
- 阐明PCSK9-介导的HCC免疫抑制的机制.
- 探索PCSK9抑制作为HCC的治疗策略.
主要方法:
- 使用了共同培养试验和HCC小鼠模型 (Hepa1-6,H22,HepG2).
- 流细胞计和单细胞RNA测序分析了瘤微环境.
- 开发了CRISPR腺基编辑 (ABE) 和小分子抑制剂,并对PCSK9抑制进行了选.
主要成果:
- PCSK9表达与HCC生存率差相关.
- 通过通过NOTCH3/FLI1通路降低SPP1和PD-L1的调节,PCSK9缺陷增强了CD8+ T细胞介导的HCC细胞杀死.
- 克里斯普尔ABE-PCSK9和PCSK9抑制剂帕雷可西布在HCC模型中显示出增强的抗瘤活性和延长生存时间.
结论:
- PCSK9通过NOTCH3/FLI1途径促进HCC免疫逃生,通过SPP1和PD-L1.1进行上调.
- 通过CRISPR ABE或小分子抑制剂抑制PCSK9代表了对HCC的有希望的治疗策略.
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