在肝癌中,NEAT1诱导的CD24从巨细胞中逃离免疫
Hiroyuki Tsuchiya1, Takehiko Hanaki2,3, Tomohiko Sakabe4
1Division of Regenerative Medicine and Therapeutics, Department of Genomic Medicine and Regenerative Therapy, Faculty of Medicine, Tottori University, Yonago, Japan. tsuchiyah@tottori-u.ac.jp.
Oncogene
|August 12, 2025
概括
长非编码RNANEAT1v1通过对巨细胞的CD24进行上调来促进肝细胞癌 (HCC) 免疫逃避. 抑制NEAT1v1和CD24可能会增强HCC患者的抗PD-1治疗.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 免疫检查点抑制剂 (ICI) 在肝细胞癌 (HCC) 中显示出有限的疗效.
- 像巨细胞一样,免疫抑制细胞有助于HCC的ICI耐药性.
- 长非编码RNAs (lncRNAs) 在癌症进展和免疫调节中发挥作用.
研究的目的:
- 研究长非编码RNA NEAT1 的作用,特别是其短异型NEAT1v1 在HCC免疫逃避中的作用.
- 阐明NEAT1v1影响巨细胞功能和HCC进展的分子机制.
- 评估NEAT1v1作为HCC的潜在治疗点.
主要方法:
- 在巨细胞中研究了NEAT1v1介导的CD24表达的诱导.
- 利用了涉及miR-320a-3p海绵和SP1转录因子激活的机制研究.
- 进行了球形共同培养测定与HCC细胞和巨细胞.
- 评估了巨细胞极化 (M1/M2标记物) 和细胞活性.
- 在用抗PD-1和抗CD24抗体治疗的同源性HCC小鼠模型中评估瘤生长和免疫反应.
- 分析了HCC患者瘤组织和血中NEAT1,SP1,CD24和miR-320a-3p的表达.
主要成果:
- NEAT1v1通过海绵化miR-320a-3p和上调SP1.1来诱导巨细胞上的CD24表达.
- NEAT1v1抑制M1巨细胞标记物和细胞活动,促进一种M2类型的表型.
- 在HCC模型中,NEAT1v1赋予抗PD-1治疗的耐药性.
- 联合抗PD-1和抗CD24抗体治疗显著抑制HCC瘤的生长.
- 在HCC组织中,NEAT1,SP1和CD24是上调的,而miR-320a-3p是下调的;在治疗后,血NEAT1水平下降.
结论:
- NEAT1v1通过 CD24 诱导巨细胞上的"不要吃我"信号来促进 HCC 免疫逃避.
- NEAT1v1代表了一种有前途的治疗标,用于提高HCC的免疫治疗疗效.
- NEAT1v1作为HCC的潜在诊断生物标志物.
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