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Clin Cancer Res:碱基切除修复抑制剂TRC102联合培美曲塞-顺铂-放疗标准方案治疗晚期非鳞状非小细胞肺癌

2021-11-23 MedSci原创 MedSci原创

TRC102可增强培美曲塞的细胞毒性并逆转患者的耐药性

TRC102可增强培美曲塞的细胞毒性并逆转患者的耐药性


肺癌仍是全球癌症相关死亡的首要原因(每年约135万人死于肺癌)。非小细胞肺癌占所有肺癌的80%。培美曲塞是第三代抗叶酸化疗药物,可抑制核苷酸合成途径中的胸苷酸合成酶 (TS) 和其他几种酶。培美曲塞除了与顺铂联合用作NSCLC的一线治疗方案之外,还被发现是一种有效的维持治疗药物。


TRC102是一种小分子碱基切除修复抑制剂,通过与化疗诱导的DNA碱基位点结合,可增强培美曲塞的细胞毒性并逆转患者的耐药性。

这是一项I期临床试验,评估了培美曲塞与TRC102联合顺铂放疗治疗III期非鳞癌非小细胞肺癌(NS-NSCLC)的最适剂量、疗效和安全性。主要终点是明确TRC102联合培美曲塞、顺铂和放疗时的最大耐受剂量(MTD)和剂量限制性毒性。次要目的是评估毒性、肿瘤反应和6个月时的无进展生存率(PFS)。基于预临床实验结果,给药方案为第1天予以培美曲塞和TRC102,第3天开始予以顺铂/放疗,连续两个疗程;随后再用两个疗程的培美曲塞和顺铂。


无进展生存率


自2015年至2019年,共招募了15位患者。中位年龄为69岁,中位随访了25.7个月(范围 7.9-47.4个月)。未观察到剂量限制性毒性和5级副反应。血液学和胃肠道毒性是最常见的副作用。未观察到临床放射性肺炎。15位患者均可评估,其中3位患者获得了完全缓解(20%),12位患者获得了部分缓解(80%)。6个月的无进展生存率为80%,2年总生产率为83%。


总生存率

综上所述,培美曲塞联合TRC102以及顺铂和放疗用于非鳞癌非小细胞肺癌的安全性和耐受性均良好。联合顺铂和培美曲塞一起使用时TRC102的推荐II期剂量为200 mg。

 

原始出处:
Biswas Tithi,Dowlati Afshin,Kunos Charles A et al. Adding Base Excision Repair Inhibitor TRC102 to standard Pemetrexed-Platinum-Radiation in Patients with Advanced Non-Squamous Non-Small Cell Lung Cancer: Results of a phase I trial.[J] .Clin Cancer Res, 2021, https://doi.org/10.1158/1078-0432.CCR-21-2025

 

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    2022-10-15 jklm09
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