在肝细胞癌中,RPL28通过降低CDC6表达的调节来调节索拉芬尼抗性
Yi Shi1, Fangfang Chen1, Yuanyuan Weng1
1Department of Molecular Pathology, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fuzhou, Fujian, China.
核糖体蛋白L28 (RPL28) 通过上调CDC6.6来驱动肝细胞癌 (HCC) 中的索拉芬尼抗性. 向RPL28-CDC6通路可能会克服晚期HCC的耐药性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 药物耐药性机制 药物耐药性机制
背景情况:
- 索拉费尼布是晚期肝细胞癌 (HCC) 的关键向治疗方法.
- 对索拉费尼布的耐药性显著限制了HCC患者的临床有效性.
- 在HCC中索拉芬尼抗性的精确分子机制尚未完全理解,核糖体蛋白质 (RP) 的作用是正在进行的研究领域.
研究的目的:
- 为了研究核糖体蛋白L28 (RPL28) 在HCC. sorafenib耐药性中的功能作用.
- 阐明RPL28通过哪些分子机制影响HCC中的sorafenib敏感性和耐药性.
- 确定潜在的治疗点,以克服HCC中索拉芬尼布耐药性.
主要方法:
- 使用HepG2和HCCLM3细胞模型对索拉费尼布耐药的HCC.
- 使用siRNA进行了RPL28敲击,以评估对细胞增殖,迁移和索拉芬尼布敏感性的影响 (IC50).
- 进行了综合的转录和蛋白质组分析,以确定下游的目标和途径,并通过西方涂抹进行验证.
主要成果:
- 在中断后,对索拉芬尼布耐药的HCC细胞中,RPL28的表达显著降低.
- RPL28倒置抑制了耐药HCC细胞中的增殖和迁移.
- 鉴定出CDC6是RPL28的关键下游标,在RPL28被淘汰后,其表达减少;免疫标记物MHC-I和PD-L1保持不变.
结论:
- 通过对CDC6进行上调,RPL28促进HCC中的索拉费尼布耐药性,从而促进瘤增殖和耐药性.
- 新的RPL28-CDC6轴代表了HCC中sorafenib耐药性的重要机制.
- 准RPL28-CDC6通路提供了一个潜在的治疗策略,以克服高级HCC中索拉芬尼抗性.
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