ASH 2014:武田抗体偶联药物Adcetris大幅改善复发性系统间变大细胞淋巴瘤(sALCL)生存率

2014-12-10 佚名 生物谷

2014年第56届美国血液学会年会(ASH)于12月6日-9日在美国旧金山举行。近日,西雅图遗传学公司(Seattle Genetics)和武田(Takeda)在会上公布了抗体偶联药物Adcetris一项关键性II期临床试验的数据。该研究在复发/难治系统性间变性大细胞淋巴瘤(sALCL)患者中开展,数据表明,平均随访46.3个月,估计的4年生存率为64%,平均无进展生存期(PFS)为20个月。

2014年第56届美国血液学会年会(ASH)于12月6日-9日在美国旧金山举行。近日,西雅图遗传学公司(Seattle Genetics)和武田(Takeda)在会上公布了抗体偶联药物Adcetris一项关键性II期临床试验的数据。该研究在复发/难治系统性间变性大细胞淋巴瘤(sALCL)患者中开展,数据表明,平均随访46.3个月,估计的4年生存率为64%,平均无进展生存期(PFS)为20个月。

Adcetris是一种抗体药物偶联物(ADC),靶向于T细胞淋巴瘤(包括经典霍奇金淋巴瘤(cHL)和系统性间变性大细胞淋巴瘤(sALCL))高度表达的CD30分子。复发性T细胞淋巴瘤(cHL和sALCL)患者群体的历史结局一直不佳,平均总生存期(OS)为5.5个月,平均无进展生存期(PFS)为3.1个月。在复发性sALCL患者中开展的这项关键II期临床所取得的高达64%的4年生存率,很好地证明了Adcetris治疗复发性sALCL的有效性。

这些令人鼓舞的数据表明,Adcetris治疗复发性sALCL取得了可持续的长期缓解,支持了进一步评估Adcetris用于更早期的治疗。目前,西雅图遗传学公司和武田正在开展一项III期ECHELON-2研究调查Adcetris用于T细胞淋巴瘤的一线治疗。

关键II期临床研究:

该项关键单组II期研究在58例复发/难治系统性间变性大细胞淋巴瘤(sALCL)患者中开展,评估了Adcetris单药疗法的疗效和安全性。此外,该研究旨在确定缓解持续时间、无进展生存期(PFS)和总生存期(OS)。研究中,患者每3周接受一次静脉输注Adcetris(1.8mg/kg体重)共治疗16个疗程。正如此前所报道的,86%的患者实现客观缓解,其中59%(30例)实现完全缓解(CR),28%实现部分缓解(PR)。

从接受首次Adcetris治疗平均随访46.3个月,平均总生存期(OS)为55.1个月,预测的4年存活率为64%,平均无进展生存期(PFS)为20.0个月。实现完全缓解(CR)的38例患者中有19例(50%)在最后一次随访时仍保持缓解,平均总生存期(OS)和无进展生存期(PFS)尚未达到。16例实现完全缓解(CR)的患者接受了干细胞移植,OS和PFS数据也尚未达到。22例实现完全缓解(CR)但未接受干细胞移植的患者,平均无进展生存期(PFS)为39.4个月,平均总生存期(OS)尚未达到。未接受任何抗淋巴瘤治疗的8例CR患者仍保持缓解。

关于Adcetris:

Adcetris是一种抗体偶联药物(ADC),由靶向CD30蛋白的一种单克隆抗体和一种微管破坏剂(单甲基auristatin E,MMAE)通过一种蛋白酶敏感的交联剂偶联而成,该偶联技术为西雅图遗传学公司(Seattle Genetics)的专有技术。CD30蛋白是经典霍奇金淋巴瘤(HL)及系统性间变性大细胞淋巴瘤(sALCL)的明确标志物,而Auristatin E可通过抑制微管蛋白的聚合作用阻碍细胞分裂。Adcetris在血液中可稳定存在,在被CD30阳性肿瘤细胞内化后,可释放出MMAE。

Adcetris于2011年8月获FDA加速批准、于2012年10月获欧盟有条件批准、于2013年2月获加拿大批准。

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    2014-12-12 kksonne
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