具备更好的靶选择性,ORR超过88%!复发难治慢性淋巴细胞白血病/小细胞淋巴瘤带来治疗新选择

2019-12-06 佚名 肿瘤资讯

Bruton酪氨酸激酶(BTK)在B细胞受体(BCR)信号转导中具有重要作用,介导B细胞增殖、迁移和粘附,其作为非霍奇金淋巴瘤(NHL)的治疗靶点,临床意义已经得到证实。Orelabrutinib(ICP-022)是一种新型、有效、不可逆的BTK抑制剂,与ibrutinib和acalabrunitib相比,靶选择性更好,进一步改善了安全性。由于orelabrutinib的特殊结构,与其他BTK

第61届美国血液学会(ASH)年会将于2019年12月7-10日在美国奥兰多隆重举行。该会议是血液病领域首屈一指的学术会议,汇集了全球血液病临床和研究科学家,共同探讨血液病领域的新技术、新进展。会议期间,江苏省人民医院的徐卫教授等报告了orelabrutinib治疗复发难治慢性淋巴细胞白血病/小细胞淋巴瘤(r/r CLL/SLL)的多中心II期研究,结果以壁报的形式公布。结果显示,orelabrutinib安全性和耐受性良好,具有高度的靶向选择性,可以有效治疗r/r CLL/SLL。

徐卫,主任医师、教授、博士生导师,南京医科大学第一附属医院(江苏省人民医院)血液科副主任,江苏省血液学会副主任委员,中国抗癌协会血液肿瘤专业委员会副主委,中国老年医学学会血液学分会常委,中国病理生理学会实验血液学专业委员会委员,中国医师协会整合医学医师分会整合血液病学专业委员会委员兼秘书,CSCO中国抗淋巴瘤联盟常委,江苏省研究型医院学会淋巴瘤专业委员会主任委员,江苏省抗癌协会血液肿瘤专业委员会副主任委员,江苏省抗癌协会淋巴瘤专业委员会常委,南京市血液学会委员。

研究背景

Bruton酪氨酸激酶(BTK)在B细胞受体(BCR)信号转导中具有重要作用,介导B细胞增殖、迁移和粘附,其作为非霍奇金淋巴瘤(NHL)的治疗靶点,临床意义已经得到证实。Orelabrutinib(ICP-022)是一种新型、有效、不可逆的BTK抑制剂,与ibrutinib和acalabrunitib相比,靶选择性更好,进一步改善了安全性。由于orelabrutinib的特殊结构,与其他BTK抑制剂相比,具有更高的生物利用度。I期研究结果(见orelabrutinib的另摘要报告)表明,orelabrutinib具有良好的药动学和药效学特性,每日给药方案可保证24小时的BTK结合。本次报告了orelabrutinib治疗中国r/r CLL/SLL患者的临床研究结果。

研究方法

这是一项开放式多中心II期研究,旨在评估orelabrutinib每日口服给药治疗的安全性、耐受性和有效性。主要终点为客观反应率(ORR),次要终点包括治疗反应持续时间(DOR)、无进展生存(PFS)和安全性。根据2008年IWCLL标准评估治疗反应,标准中新增了PR伴淋巴细胞增多(PR-L)(Cheson,Hallek 2012)。研究分为两个阶段,第一阶段评价orelabrutinib 150 mg,qd治疗r/r CLL/SLL的安全性和耐受性,第二阶段评价orelabrutinib150 mg,qd治疗获益。

研究结果

该研究共招募了80例r/r CLL(n=70)/SLL(n=10)患者,截至2019年5月31日,40例患者完成了6个疗程(28天/周期)的治疗,中位随访6.3个月(范围0.4~13.7个月)。最常见的(≥15%)任何原因任何级别的不良事件(AEs)主要为血液学毒性,包括血小板减少、中性粒细胞减少、贫血、呼吸系统感染以及紫癜,无房颤或继发性恶性肿瘤报告。≥3级的最常见(≥10%)的AEs包括中性粒细胞减少、血小板减少和肺部感染。25例患者至少经历了一次严重的不良事件(SAE),其中13例与orelabrutinib治疗有关,包括血小板计数下降(3例)、肺炎(2例)、发热(2例)和带状疱疹(1例)等。

80例受试者中,78例有可评估治疗反应(2019年5月31日),ORR为88.5%(69/78),其中1例为CR,39例为PR,29例为PR-L,疾病稳定者6/78例(7.7%)。疾病总控制率(DCR)为96.2%,中位DOR尚未达到,6个月DOR率为89.8%,亚组分析(年龄、疾病分期、既往治疗、17p缺失、11q缺失、IGHV突变)无显着性差异。

结论

Orelabrutinib安全性和耐受性良好,无明显的不良反应,如心房颤动/扑动或继发性恶性肿瘤,且可以有效治疗r/r CLL/SLL。Orelabrutinib安全性的改善源于高度的靶向选择性,每日给药方案使orelabrutinib成为一种有价值的治疗方案,既可单药亦可与其他药物联合治疗B细胞恶性肿瘤。

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    2019-12-08 psybestwish

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