尺寸很重要:结合瘤体积和免疫激活特征可以预测免疫治疗反应
Su Yin Lim1,2, Ines Pires da Silva3,4,5, Nurudeen A Adegoke3,5,6
1Macquarie Medical School, Faculty of Medicine, Human and Health Sciences, Macquarie University, Sydney, NSW, Australia. esther.lim@mq.edu.au.
Molecular cancer
|October 11, 2024
概括
通过将免疫基因活性与瘤体积相结合,在黑色素瘤中预测对免疫检查点抑制剂 (ICI) 的反应得到了改善. 这种新的方法提高了确定可能受益于ICI治疗的患者的准确性.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 免疫检查点抑制剂 (ICI) 已经彻底改变了癌症治疗,特别是黑色素瘤,但预测患者的反应仍然是一个重大的临床挑战.
- 大约40%的黑色素瘤患者无法从目前的ICI治疗中获得实质性益处,因此需要改进预测生物标志物.
- 准确预测ICI反应对于优化治疗策略和黑色素瘤患者的治疗结果至关重要.
研究的目的:
- 开发一种新的,简单的方法来预测黑色素瘤患者的ICI反应.
- 将免疫关联的转录组签名与瘤体积负担相结合,以提高预测准确度.
- 确定决定黑色素瘤ICI治疗持续反应的关键因素.
主要方法:
- 对32名晚期黑色素瘤患者的治疗前瘤样本进行了RNA测序,这些患者接受了联合PD1和CTLA4抑制剂的治疗.
- 使用计算机断层扫描 (CT) 成像来评估瘤体积.
- 后勤回归和接收器操作特征 (ROC) 曲线分析被用来评估综合免疫特征和瘤体积的预测能力.
主要成果:
- 单独对标志性干扰因子- (IFNγ) 基因组的分析显示,ICI反应的预测能力有限 (AUC=0.6404).
- 将IFNγ活动与瘤体积 (基因组表达与瘤体积的比率) 结合在一起,显著改善了ICI反应的预测 (AUC=0.7760,p=0.02).
- 这种综合方法显示出高灵敏度 (88%) 和特异性 (67%),并在独立的队列中成功复制.
结论:
- 结合免疫相关的转录密码与瘤体积负担,可以提高在黑色素瘤中ICI反应的预测.
- 相对于瘤负担,较高的免疫激活水平可能是需要持久的ICI反应.
- 这种新的方法提供了一个有前途的工具,可以通过ICI来个性化黑色素瘤治疗.
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