Nature Medicine:CD19-CD22双靶点CAR-T临床试验结果发布

2021-08-01 “E药世界”公众号 “E药世界”公众号

癌症细胞治疗,属于免疫治疗,通过将自体或异体免疫细胞在体外进行改造后回输到病人体内,从而增强其对癌细胞的杀伤作用,进而治疗癌症。目前癌症细胞治疗包括 CAR-T、TCR-T、CAR-NK、TIL、CT

癌症细胞治疗,属于免疫治疗,通过将自体或异体免疫细胞在体外进行改造后回输到病人体内,从而增强其对癌细胞的杀伤作用,进而治疗癌症。目前癌症细胞治疗包括 CAR-T、TCR-T、CAR-NK、TIL、CTL 等等。

2017 年 8 月,FDA首次批准了诺华公司的靶向 CD19 的 CAR-T 细胞疗法 Kymriah 上市,此后又陆续批准了 3 款靶向 CD19 的 CAR-T 细胞疗法上市。今年 3 月份,百时美施贵宝(BMS)公司开发的靶向 BCMA 的 CAR-T 细胞疗法 Abecma 获得 FDA 批准用于治疗多发性骨髓瘤。成为第 5 款获 FDA 批准的 CAR-T 细胞疗法,也是第一款获批的靶向 CD19 以外靶点的 CAR-T 细胞疗法。

以 CAR-T 为代表的细胞疗法已成为近年来癌症治疗领域最重大的突破之一。截至目前,全球共有超过 2000 种活性细胞治疗药物研发管线,其中最多的是靶向 CD19,其次是 BCMA 和 CD22。

尽管取得了令人瞩目的进展,但在接受靶向 CD19 的 CAR-T 疗法的癌症患者中,仍有超过 50% 的患者出现疾病进展。

2021年7月26日,美国斯坦福大学医学院的研究人员在国际顶尖医学期刊 Nature Medicine 发表了题为:CAR T cells with dual targeting of CD19 and CD22 in adult patients with recurrent or refractory B cell malignancies: a phase 1 trial 的临床实验论文。

研究团队使用 CD19-CD22 双特异性 CAR-T 治疗急性B淋巴细胞白血病(B-ALL)和大B细胞淋巴瘤(LBCL)。

这项1期临床试验结果表明,17 名 B-ALL 患者中,100%的患者有反应,15 人(88%)微小残留病变阴性完全缓解。21 名 LBCL 患者中, 13 人(62%)有反应,6人(29%)完全缓解。

10 名复发的 B-ALL 患者中的 5 名为 CD19 低表达或缺失,14 名复发的 LBCL 患者中的 4 名为 CD19 低表达或缺失,这说明抗原丢失是出现 CAR-T 细胞疗法耐药的主要原因。

这项1期临床试验共 39 名患者,他们被纳入两个队列,急性B淋巴细胞白血病(B-ALL)17 人,大B细胞淋巴瘤(LBCL)22 人。但其中 1 名 LBCL 患者在接受细胞疗法输注前因疾病进展而死亡。因此,共计38名患者接受了 CD19-CD22 双特异性 CAR-T 疗法。

这项1期临床试验结果表明,17 名 B-ALL 患者中,100%的患者有反应,15 人(88%)微小残留病变阴性完全缓解。21 名 LBCL 患者中, 13 人(62%)有反应,6人(29%)完全缓解。

该临床试验结果表明,CD19-CD22 双特异性 CAR-T 疗法对急性B淋巴细胞白血病(B-ALL)具有非常高的安全性和有效性。

此外,10 名复发的 B-ALL 患者中的 5 名为 CD19 低表达或缺失,14 名复发的 LBCL 患者中的 4 名为 CD19 低表达或缺失,这说明抗原丢失是出现 CAR-T 细胞疗法耐药的主要原因,为双靶点 CAR-T 疗法提供了理论依据。

此外,早在2020年4月,中国人民解放军总医院韩卫东教授团队就曾在 Journal of Hematology & Oncology 期刊发表了 CD19-CD22 双特异性 CAR-T 治疗急性B淋巴细胞白血病(B-ALL)的临床试验论文,表明了该疗法的安全性和有效性。

原始出处:

Dai, H., Wu, Z., Jia, H. et al. Bispecific CAR-T cells targeting both CD19 and CD22 for therapy of adults with relapsed or refractory B cell acute lymphoblastic leukemia. J Hematol Oncol 13, 30 (2020). https://doi.org/10.1186/s13045-020-00856-8.

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    2022-01-04 kalseyzl
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    2021-08-15 jeanqiuqiu
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    2022-05-31 仁者大医
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    2021-11-24 liye789132251
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    2021-08-02 dingxiaobo
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