Blood:纳武单抗用于alloHCT后复发的血液恶性肿瘤的疗效和安全性

2020-06-08 QQY MedSci原创

CTLA-4阻断可增强异基因造血细胞移植(alloHCT)后在复发性恶性血液病(HMs)中的移植物抗肿瘤作用。PD-1/PDL-1的相互作用也可导致T细胞功能受损,但对alloHCT后抗PD-1治疗的

CTLA-4阻断可增强异基因造血细胞移植(alloHCT)后在复发性恶性血液病(HMs)中的移植物抗肿瘤作用。PD-1/PDL-1的相互作用也可导致T细胞功能受损,但对alloHCT后抗PD-1治疗的回顾性研究报道了GVHD的大量毒性。

本试验是一项前瞻性的、多中心的I期临床试验,旨在评估PD-1阻断对alloHCT后的复发性HMs的作用。招募alloHCT复发HMs的患者。主要目的是明确Nivolumab用于这类患者的最大耐受剂量和安全性。次要目的是评估Nivolumab的效果和免疫活性。

共招募了28位患者(19位髓系肿瘤、9位淋巴瘤),予以Nivolumab治疗,1次/2周,直到病程进展或出现不可耐受的毒性;起始剂量为1 mg/kg,根据毒性计划降至0.5 mg/kg。

受试患者的中位年龄为57岁(范围 27-76岁),从alloHCT到入组的中位时间为21个月(范围 5.6-108.5个月)。6位采用1 mg/kg治疗的患者中有2位发生了免疫相关不良事件(irAEs)引起的剂量限制性毒性(DLT);在22位采用0.5 mg/kg剂量治疗的患者中,发生了4例DLT,包括两例irAE和两例致死性GVHD。

疗效可评估患者的总有效率为32%(8/25)。中位随访11个月,1年PFS和OS分别是23%和56%。

综上所述,在首次抗PD-1抗体治疗alloHCT后复发的前瞻性临床试验中,出现了GVHD和irAEs,需要降低剂量,且只有适度的抗肿瘤活性,提示在抗PD-1治疗的进一步研究中可能需要制定特定的毒性缓解策略。

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    2020-06-10 膀胱癌
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    2020-06-10 mjldent
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    2020-06-09 内科新手

    谢谢梅斯提供这么好的信息,学到很多

    0

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