一项II期研究,评估中枢神经系统淋巴瘤复发或耐药的易布鲁替尼单一治疗的长期反应
Christian Grommes1,2,3, Subhiksha Nandakumar2,4, Lauren R Schaff1,3
1Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York.
概括
易布鲁替尼在复发性/耐药性中枢神经系统 (CNS) 淋巴瘤中表现出显著的活性,观察到显著的反应和长期存活. 生物标志物分析确定了对这种布鲁顿氨酸激酶抑制剂反应的潜在预测因素.
科学领域:
- 在瘤学瘤学.
- 药理学 药理学是指药理学的学科.
- 遗传学 遗传学 是一个
背景情况:
- 初级和二级中枢神经系统 (CNS) 淋巴瘤是具有有限治疗选择的侵袭性恶性瘤.
- 复发性或耐药性 (r/r) 疾病构成了重大的临床挑战,需要新的治疗策略.
- 布鲁顿氨酸激酶抑制剂易布鲁替尼 (Ibrutinib) 已成为各种B细胞恶性瘤的潜在治疗方法.
研究的目的:
- 评估ibrutinib的长期安全性和抗瘤活性,对患有r/r初级中枢神经系统淋巴瘤 (PCNSL) 和二级中枢神经系统淋巴瘤 (SCNSL) 的患者进行评估.
- 在中枢神经系统淋巴瘤中确定与ibrutinib治疗反应相关的潜在分子决定因素.
- 评估脑脊液循环瘤DNA (ctDNA) 清除对治疗结果的影响.
主要方法:
- 一项剂量扩大队列研究招募了26名具有r/r PCNSL/SCNSL的额外患者,与之前的队列结合,共46名患者.
- 患者每天服用 560 毫克或 840 毫克的易布鲁替尼.
- 在治疗前和治疗期间,分析瘤活检和脑脊液样本,以检测DNA突变和ctDNA水平.
主要成果:
- 在74%的PCNSL患者和60%的SCNSL患者中观察到瘤反应,在两组中都观察到完整的反应.
- 无进展生存期 (PFS) 的中位数为PCNSL的4.5个月,SCNSL的5.3个月.
- 探索性分析表明,TBL1XR1突变可能与PCNSL的长期反应相关,ctDNA清除与完整和持久的反应有关.
结论:
- 易布鲁替尼在复发性或耐火性中枢神经系统淋巴瘤患者中表现出持续的单剂活性.
- 分子标记物,包括TBL1XR1突变和ctDNA清除,可以预测对ibrutinib的反应.
- 长期跟踪证实了ibrutinib作为中枢神经系统淋巴瘤的治疗选择的潜力.
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