JAMA Oncol:Fedratinib治疗原发性和继发性骨髓纤维化患者的安全性和疗效性

2015-08-17 崔倩 译 MedSci原创

骨髓纤维化(MF)是一种BCR-ABL阴性骨髓增殖性肿瘤,特征是贫血、脾肿大、衰弱的体质症状、以及生存期缩短。Fedratinib,一种JAK2选择性抑制剂,以前在早期阶段的临床试验中,Fedratinib表现出了对MF患者的临床有益性。该研究的目的是评估fedratinib对于治疗原发性或继发性MF患者(真性红细胞增多症和原发性血小板增多症)的疗效性与安全性。该双盲、随机、安慰剂对照的3期研究在

骨髓纤维化(MF)是一种BCR-ABL阴性骨髓增殖性肿瘤,特征是贫血、脾肿大、衰弱的体质症状、以及生存期缩短。Fedratinib,一种JAK2选择性抑制剂,以前在早期阶段的临床试验中,
Fedratinib表现出了对MF患者的临床有益性。该研究的目的是评估fedratinib对于治疗原发性或继发性MF患者(真性红细胞增多症和原发性血小板增多症)的疗效性与安全性。

该双盲、随机、安慰剂对照的3期研究在24个国家的94个站点进行,包括289例成人(≥18岁)中期-2或高危原发性MF,真性红细胞增多症MF后期,或原发性血小板增多症MF后期患者,这些患者在2011年12月和2012年9月之间被随机分配接受每日一次口服fedratinib,剂量为400mg,或接受安慰剂500mg,试验进行至少6个连续4周的周期。

主要终点是在第24周时脾脏的反应(脾脏体积从基线缩小≥35%,通过磁共振成像或计算机断层扫描测定),并在4周后进行确认。主要的次要终点是症状反应(总症状评分减少≥50%,使用修改后的骨髓纤维化症状评估表进行评估)。

fedratinib 400mg组中的96例患者中的35例患者达到了主要终点(36%[95%Cl,27%-46%]),fedratinib 500mg组中的97例患者中的39例患者达到了主要终点(40%[95%CI,30%-50%]),安慰剂组中96例患者中的1例达到了主要终点(1%[95%Cl,0%-3%]),(P<0.001)。在24周时症状缓解率在fedratinib 400mg,500mg,和安慰剂组分别为33/91(36%[95%Cl,26%-46%]),31/91(34%[95%Cl 24%-44%]), 6/85 (7%[95%CI,2%-13%])(P<0.001)。与fedratinib治疗相关的常见的不良事件是贫血,胃肠道症状、肝转氨酶、血清肌酸酐和胰腺酶水平升高。接受fedratinib500mg/天组中有4名女性被报道服药期间发生脑病。通过磁共振成像诊断出有3例患者发生韦尼克脑病,临床疑似病例1例。

 Fedratinib治疗显著减小了脾肿大和MF患者的症状负担。但在一些患者中这些益处也伴随着一些副作用,最重要的是脑病发生的未知机制。fedratinib的临床发展随后被中止。

原始出处:

Animesh Pardanani, Claire Harrison, Jorge E. Cortes,et al.Safety and Efficacy of 

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    2016-06-29 xzw113
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    2015-11-20 feifers
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    2016-02-15 minlingfeng