前列腺瘤免疫微环境在免疫疗法后发生变化,这些免疫疗法由患有抗瘤反应或免疫相关不良事件的患者共享
Ichwaku Rastogi1, Douglas G McNeel1
1University of Wisconsin, Carbone Cancer Center, Madison, WI, USA.
Oncoimmunology
|December 11, 2025
概括
在接受PD-1封锁和DNA疫苗治疗的前列腺癌患者中,与免疫相关的不良事件 (irAE) 与抗瘤免疫相关. 这些事件表明成功的免疫反应,即使没有立即的瘤缩.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症免疫疗法癌症免疫疗法
背景情况:
- 检查点抑制剂 (PD-1/PD-L1) 在前列腺癌中表现出有限的疗效.
- 一项先前的试验结合了PD-1阻断和DNA疫苗 (pTVG-HP) 在转移性割抵抗性前列腺癌患者中.
- 这种组合显示PSA降低35%,与免疫相关的不良事件 (irAE) 在42%.
研究的目的:
- 研究前列腺癌患者的irAE和抗瘤免疫之间的关联.
- 分析响应者与非响应者的瘤微环境变化.
- 与特定的免疫标志物和临床结果相关联.
主要方法:
- 从12名患者的治疗前和治疗后瘤活检的基因表达特征和空间蛋白质分析.
- 对临床响应者 (PSA降低) 和非响应者的评估.
- 分析免疫标记物,检查点抑制剂,抗原表现,T细胞激活,VISTA,骨髓衍生抑制细胞 (MDSC) 和PARP表达.
主要成果:
- 临床响应者表现出检查点标记物表达减少和树突细胞标记物增加,抗原呈现和T细胞激活.
- 响应者的基因表达特征与经历了irAE的患者的基因表达特征重叠.
- 没有反应的患者表现出免疫抑制途径的丰富,包括VISTA和MDSC标志物的升高. 没有irAE的患者增加了PARP表达.
结论:
- 在接受PD-1封锁和疫苗的患者中,irAEs可以表明对瘤的免疫反应,即使没有立即的临床疗效.
- 瘤透的抗原呈现细胞和T细胞激活对于成功的免疫治疗至关重要.
- 结合疫苗和PD-1封锁与针对MDSC,VISTA或PARP的疗法,需要进一步调查.
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