在瘤相关抗原呈现细胞中准STAT3,作为脏和膀癌免疫治疗策略
Marice B Alcantara1, Wilson S Tang1, Dongfang Wang1
1Department of Immuno-Oncology, Beckman Research Institute, City of Hope National Medical Centre, Duarte, CA, United States.
Frontiers in immunology
|January 23, 2024
概括
用CpG-STAT3ASO向髓状细胞中的STAT3显示出治疗尿生殖系统癌症的前景. 这种方法可以通过恢复抗瘤免疫力来克服对免疫检查点阻塞 (ICB) 的抵抗.
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:
- 免疫检查点封锁 (ICB) 改善了癌症治疗结果,但响应率有限,特别是在转移性疾病中.
- STAT3 (信号转换器和转录激活器3) 是瘤免疫逃避的关键调节器,但其在脏和膀癌症中免疫疗法耐药性的作用尚未完全理解.
研究的目的:
- 在癌患者中调查与ICB耐药性相关的免疫变化.
- 评估骨髓细胞选择性STAT3抑制在生殖尿道癌症中的治疗潜力.
主要方法:
- 在接受nivolumab/ipilimumab治疗的癌患者中评估血液生物标志物.
- 使用一种反感性寡核酸 (ASO) 策略 (CpG-STAT3ASO) 在髓状细胞中进行STAT3敲击.
- 单独测试CpG-STAT3ASO和与抗PD1结合在脏和膀癌的同基因小鼠模型中进行了测试.
主要成果:
- 没有对ICB反应的患者表现出与STAT3激活和免疫抑制相关的炎症促进媒介的升高.
- 主要观察到的STAT3激活是在循环的髓质衍生抑制细胞 (MDSC) 中.
- 在小鼠模型中,CpG-STAT3ASO表现出显著的抗瘤活性,超过单独的PD1阻断. 组合疗法增强了疗效,特别是在膀癌中,与免疫细胞调节相关.
结论:
- 针对骨髓细胞的STAT3抑制为生殖尿路癌提供了潜在的治疗策略.
- 这种方法可以通过破坏免疫抑制信号和恢复抗瘤免疫反应来克服对ICB的耐药性.
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