Blood:抗CD19 CAR T细胞治疗后病情进展的B-ALL成人患者的干预措施和临床预后

2021-08-26 Nebula MedSci原创

抗CD19 CAR T细胞疗法后病情进展的B-ALL成人患者的总体预后较差

中心点| CAR T细胞治疗后病情进展的B-ALL患者预后较差,仍是未被满足的临床需求;CAR T细胞治疗后病情进展的患者,通过博纳吐单抗、Inotuzumab或再输注CAR T细胞治疗还可获得完全缓解,但缓解持续时间和生存期都有限。

CD19靶向嵌合抗原受体(CAR)T细胞疗法是复发性/难治性B细胞急性淋巴细胞白血病(B-ALL)患者的突破性治疗方法。但是,虽然在CAR T细胞疗法的应用下,初期缓解率高,但大部分B-ALL患者最终还是会发生病情进展。

目前尚无关于CD19 CAR - T细胞治疗后B-ALL成人患者病情进展的自然史、管理和预后结果的详细数据。为补充这方面数据,Wudhikarn等汇报了在其单位接受CD19 CAR T细胞疗法后病情进展的38位B-ALL成人患者的综合数据,报告于近日发表在了《血液》杂志上。

(A)3年无进展生存率;(B)3年总生存率;(C)累积复发率

CAR T细胞治疗后病情进展前的中位时间为7.5个月。3年无进展生存率(EFS)为16.1%(95%CI 8.8-29),3年总生存率为26.6%(95%CI 17-42),一年累积复发率为67.9%(95%CI 53.6-78.6)。CAR T细胞输注时高疾病负荷与CAR T细胞治疗后病情进展的风险显著相关。30位(79%)患者接受了针对CAR T细胞治疗后病情进展的挽救治疗,13位(43%)获得了完全缓解(CR),这13位患者的中位EFS为4.5个月(95%CI 2.1-32.1)。

经挽救治疗获得完全缓解的患者的EFS

值得注意的是,12位患者中有7位(58.3%)在CAR T细胞治疗失败后的接受博纳吐单抗和/或Inotuzumab治疗获得了完全缓解。多变量分析显示,CAR T细胞治疗后缓解持续时间长的患者,后续(CAR T细胞疗法后)病情进展后的生存预后也相对较好。

总之,抗CD19 CAR T细胞疗法后病情进展的B-ALL成人患者的总体预后较差,虽然部分患者通过挽救治疗(包括博纳吐单抗、Inotuzumab、再输注CAR T细胞)还可以获得完全缓解。因此,我们需要新的治疗策略来降低B-ALL成人患者经CAR-T细胞治疗后病情进展的风险,并改善这部分患者的预后

原始出处:

Kitsada Wudhikarn, et al. Interventions and outcomes of adult patients with B-ALL progressing after CD19 chimeric antigen receptor T-cell therapy. Blood (2021) 138 (7): 531–543. https://doi.org/10.1182/blood.2020009515

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    2021-08-28 仁医06
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    2021-08-28 dingxiaobo
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