潜在的瘤突变负担和新抗原分析预测了转移性黑色素瘤免疫治疗反应
Yizhe Mao1,2,3, Tuba N Gide1,2,3, Nigel G Maher1,2,3,4
1Melanoma Institute Australia, The University of Sydney, Sydney, NSW, Australia.
NPJ precision oncology
|January 22, 2026
概括
瘤突变负担 (TMB) 估计可在黑色素瘤免疫疗法平台上重现. 与TMB相比,新抗原负载可以更好地预测无进展生存率.
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:
- 瘤突变负担 (TMB) 是预测免疫治疗反应的关键生物标志物.
- 确定TMB估计在不同平台上的可重复性对于临床应用至关重要.
研究的目的:
- 在两个实验室中使用TruSight瘤500面板评估黑色素瘤TMB估计的可重现性.
- 将TMB结果与FoundationOne CDx和QIAseq TMB IO面板进行比较.
- 评估TMB和新抗原负载对黑色素瘤患者免疫治疗反应的预测值.
主要方法:
- 在两个独立实验室使用TruSight Oncology 500进行TMB估计.
- 使用FoundationOne CDx和QIAseq TMB IO面板进行比较分析.
- 在接受免疫检查点抑制剂治疗的198名黑色素瘤患者中,TMB和新抗原负载与临床结果 (反应和无进展生存率) 的相关性.
- 在135个样本中进行新抗原分析.
主要成果:
- 跨平台的TMB估计,突变调用和热点变体 (BRAF,N/K/HRAS) 的高一致性.
- 高TMB (≥10mut/Mb) 与改善的反应和无进展的存活率相关.
- 在PTPRD和生殖系PIK3CA变体 (I391M) 的体质突变与有利的结果有关.
- 新抗原负载,特别是具有强烈的II类MHC结合,预测无进展生存比TMB更好.
- 与新抗原生产相关的NF1和ROS1突变改善了结果.
结论:
- 在黑色素瘤中,TMB估计可以在不同的平台上重现.
- 与TMB相比,新抗原分析为免疫疗法反应提供了优越的预测价值.
- 识别特定突变 (PTPRD,PIK3CA,NF1,ROS1) 可以进一步完善接受免疫治疗的黑色素瘤患者的结果预测.
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