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Updated: Jul 19, 2025

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在TP53中变异性等位基因频率的变化预测了转移性尿路细胞癌患者的pembrolizumab反应
Kazuki Hamada1, Yoshiyuki Nagumo1, Shuya Kandori1
1Department of Urology, Faculty of Medicine and Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan.
Oncology letters
|August 10, 2023
概括
血循环瘤DNA (ctDNA) 分析,特别是TP53突变,可以预测转移性尿路细胞癌 (mUC) 中对 pembrolizumab 的反应. 这种非侵入性生物标志物有助于监测mUC患者的治疗有效性.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 免疫治疗是一种免疫疗法.
背景情况:
- 用 pembrolizumab 治疗转移性尿路细胞癌 (mUC) 的结果显示出不同的反应.
- 需要使用非侵入性生物标志物来预测mUC患者的pembrolizumab疗效.
研究的目的:
- 为了研究血循环瘤DNA (ctDNA) 变化作为预测性生物标志物,用于mUC中的pembrolizumab反应.
- 评估CTDNA中TP53突变对于预测治疗结果的有用性.
主要方法:
- 对25个血ctDNA样本的回顾性分析,这些样本来自16名用 pembrolizumab治疗的mUC患者.
- 77个基因的有针对性的测序,以确定基因组的改变.
- 与 pembrolizumab 反应的ctDNA 变化的相关性.
主要成果:
- 16名患者中有11名 (68.8%) 具有≥2个基因组变异,包括TP53突变 (ctDNA阳性).
- 与ctDNA阴性组 (20.0%) 相比,在ctDNA阳性组 (72.7%) 观察到对 pembrolizumab 的更高反应率.
- 在治疗期间TP53变体等位基因频率的下降与治疗反应相关.
结论:
- 血ctDNA分析,特别是TP53分析,显示出作为预测和监测mUC. pembrolizumab响应的非侵入性生物标志物的前景.
- ctDNA状态可以帮助分层mUC患者的免疫疗法疗效.
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