J Immunother Cancer:晚期黑色素瘤抗PD-1免疫治疗时的耐药类型和影像学变化

2021-03-01 MedSci原创 MedSci原创

晚期黑色素瘤抗PD-1免疫治疗时的耐药类型和影像学变化

抗程序性细胞死亡蛋白1 (PD-1)单药治疗极大地改变了晚期黑色素瘤的系统治疗前景,然而耐药性阻碍了抗PD-1抗体的临床应用。虽然癌症免疫治疗学会(SITC)免疫治疗耐药工作组最近明确了抗PD-1治疗的原发性和继发性耐药定义,但缺乏关于这些耐药亚型在影像学检查和临床表现方面的差异的真实数据。

在本研究中,独立的放射科医生对在麻省总医院和北京大学肿瘤医院接受抗PD-1单药治疗的254例晚期黑色素瘤患者(中位随访31个月)进行了单盲的放射影像再评估,分析多个关键时间点的影像学特征和时机,以及其之间的相互关联和与生存关系。采用SITC免疫治疗耐药工作组定义的原发性和继发性耐药。

最显著的靶病变检查变化发生在抗PD-1治疗后的前3个月内。在最初的评估中,有肿瘤缩小的稳定疾病患者表现出比无肿瘤缩小的患者更明显的病程轨迹,随后这些患者获得部分或完全缓解(PR/CR)的比率分别为44%(有肿瘤缩小)和0%(无肿瘤缩小)。11%的PR患者最终获得了CR。

在多变量分析中,获得缓解深度越深的患者,病情进展越少、累及的器官越少、肿瘤负荷越轻、肿瘤进展(PD)时的生长速度越慢(均p≤0.001),而且进展后的生存期(PPS)也越长(双变量分析,p=0.005)。

与原发耐药相比,继发耐药与PD分布较少、肿瘤负担较低和肿瘤生长缓慢相关(均p≤0.001)。继发性耐药患者接受进一步系统治疗的可能性较小(28% vs 57%,p<0.001),但PPS显著更长(HR 0.503,95%CI 0.288-0.879,p=0.02)。

总之,影像学检查结果是可变的,且与生存结果显著相关。SITC定义的原发和继发耐药是黑色素瘤患者不同的临床表现,这表明以后该结果一旦获得了前瞻性研究的证实,那么基于耐药类型的治疗决策和临床试验设计将变成可能。

原始出处:

Bai Xue,Kim Michelle,Kasumova Gyulnara et al. Radiological dynamics and SITC-defined resistance types of advanced melanoma during anti-PD-1 monotherapy: an independent single-blind observational study on an international cohort. J Immunother Cancer, 2021, 9: 10.1136/jitc-2020-002092

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    2021-05-27 sunylz
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    2021-03-02 科研科研科研

    晚期黑色素瘤抗免疫治疗时的耐药类型

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    2021-03-01 jyzxjiangqin

    好文章!

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