Clin Cancer Res:抗PD-1抗体联合多激酶抑制剂治疗晚期胃癌

2022-06-16 MedSci原创 MedSci原创

抗PD-1抗体联合瑞戈非尼或乐伐替尼在晚期胃癌中展现出了可期的抗肿瘤活性

近年来,免疫检查点抑制剂(ICI),如PD-1或抗PD-L1单克隆抗体已成为多种恶性肿瘤的标准疗法之一,包括晚期胃癌(AGC)。在3期亚洲ATTRACTION-2研究中,抗PD-1单克隆抗体纳武单抗作为三线或后续治疗显著改善了晚期胃癌的生存预后;在全球CheckMate-649研究中,纳武单抗联合标准细胞毒性药物作为一线治疗也显著改善了晚期胃癌的生存预后。

Yukami等研究人员既往报道了瑞戈非尼联合纳武单抗或乐伐替尼联合派姆单抗在晚期胃癌中的初始活性。同时,多项研究显示已发生肝转移性的患者对免疫治疗的反应性相对较差。

本文报告了Ib期试验(REGONIVO队列,瑞戈非尼联合纳武单抗)和II期试验(LENPEM队列,乐伐替尼联合派姆单抗)延长随访的联合疗效终点。此外,研究人员还评估了抗PD-1单药治疗(抗PD-1单药队列)的疗效。


REGONIVO和LENPEM队列有无肝转移患者的无进展生存率(C)和总生存率(D)

在REGONIVO和LENPEM队列中,中位随访了14.0个月,有肝转移的晚期胃癌患者的客观缓解率(ORR)是46%,中位无进展生存期(mPFS)是7.8个月,中位总生存期(mOS)是15.6个月;无肝转移患者的ORR、mPFS和mOS分别是69%、6.9个月和15.5个月。


抗PD-1单药队列有无肝转移患者的无进展生存率(C)和总生存率(D)

在抗PD-1单药队列中,中位随访了27.6个月,肝转移患者的ORR、mPFS和mOS分别是9%、1.4个月和6.4个月,而无肝转移患者的分别是22%、2.3个月和9.0个月。

多重免疫组化分析显示,肝转移与大量免疫抑制细胞有关,如肿瘤相关巨噬细胞和调节性T细胞;与胃原发性肿瘤相比,肝转移患者的CD8+T细胞较少。

综上,延长随访时,抗PD-1抗体联合瑞戈非尼或乐伐替尼在晚期胃癌中展现出了可期的抗肿瘤活性,无论患者有无肝转移,即使肝转移灶中的免疫抑制性肿瘤微环境更强。

 

原始出处:

Hiroki Yukami, et al. Updated efficacy outcomes of anti-PD-1 antibodies plus multikinase inhibitors for advanced gastric cancer patients with or without liver metastases in clinical trials. Clin Cancer Res clincanres.0630.2022-2-27 11:45:33.693. https://doi.org/10.1158/1078-0432.CCR-22-0630

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    2022-09-04 jklm09
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    2022-06-17 redcrab
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