JCO:延迟强化治疗不能提高儿童ALL的预后和总生存期

2014-01-03 佚名 丁香园

在2002年到2007年期间,ALL IC-BFM 2002协作组对三大洲、15个国家的急性淋巴细胞白血病(ALL)儿童做了一项研究。该研究的主要目的是探讨延迟强化治疗(DI)对所有高危人群预后的影响。该研究发表于2013年12月16日在线出版的《临床肿瘤学杂志》(Journal of Clinical Oncology)上。 该研究共纳入5060例患者,根据患者年龄

在2002年到2007年期间,ALL IC-BFM 2002协作组对三大洲、15个国家的急性淋巴细胞白血病(ALL)儿童做了一项研究。该研究的主要目的是探讨延迟强化治疗(DI)对所有高危人群预后的影响。该研究发表于2013年12月16日在线出版的《临床肿瘤学杂志》(Journal of Clinical Oncology)上。【原文下载】

该研究共纳入5060例患者,根据患者年龄、白细胞计数、早期治疗反应和遗传畸变共分为三个危险组。DI 随机用于以下治疗组:标危组(SR):两个4周强化疗程(protocol III)vs 一个7周疗程(protocol II);中危组(IR):protocol III x 3 vs protocol II x 1;高危组(HR):protocol III x 3 vs protocol II x 2(AIEOP协作组方案),或者3个疗程 HR方案 加 protocol II(BFM协作组方案)。

5060例入组患者的5年无事件生存率和生存率分别为74%、82%,SR组(n=1564)分别为81%、90%,IR组(n=2650)分别为75%、83%,HR组(n=846)分别为55%、62%。DI并不能提高患者的无事件生存率和生存期。

ALL IC-BFM 2002研究是儿童肿瘤在国际开展合作一个很好的例子,大多数国家都能参与该项研究。虽然与传统的治疗方案相比,替代的DI不能改善患者的预后,总的生存期也未能提高;但ALL IC-BFM 2002研究给未来的国际合作带来了很好的经验。

研究背景

I-BFM-S协作组由来自世界范围内的30多个国家研究小组组成,主要从事儿科方面白血病和淋巴瘤的临床和基础研究。过去的20年,BFM协作组通过基于原有的化疗方案对儿童ALL做了几项非常成功的临床试验。修改后的所有治疗方案都经欧洲协作组在临床试验中得到验证。

I-BFM-S协作组中有来自资源有限、经验缺乏国家的研究小组,为了使试验顺利进行,必须根据当地的情况对方案进行改良。根据BFM协作组对治疗的早期有效率的计算(即:第8天强的松在外周血有效率(PR),骨髓(BM)原始细胞第15天的百分比),通过普遍采用的方法,所有的患者都可以进行危险分组。

最近许多研究小组已经证明,利用聚合酶链反应(PCR)对微小残留病(MRD)进行定量分析是评估ALL早期治疗有效率的有效方法。AIEOP协作组和BFM协作组已经证明,检测第5周和第12周的PCR-MRD水平可以对患者进行危险分层;相较于传统的分层方法,该方法具有明显的优势。但该方法既昂贵又费时,并且技术要求很高,限制了其大规模应用。

因此,I-BFM-SG协作组结合第8天PR的形态学表现和第15、33天骨髓的原始细胞数目探索出了一种新的可行性分层方法。这种方法使缺乏技术、不能检测PCR-MRD水平的国家可以参与IC-BFM 2002研究。

原文出处:

Stary J, Zimmermann M, Campbell M, Castillo L, Dibar E, Donska S, Gonzalez A, Izraeli S, Janic D, Jazbec J, Konja J, Kaiserova E, Kowalczyk J, Kovacs G, Li CK, Magyarosy E, Popa A, Stark B, Jabali Y, Trka J, Hrusak O, Riehm H, Masera G, Schrappe M.Intensive Chemotherapy for Childhood Acute Lymphoblastic Leukemia: Results of the Randomized Intercontinental Trial ALL IC-BFM 2002.J Clin Oncol. 2013 Dec 16. 【原文下载】

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    2014-07-05 lidong40
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    2014-01-05 膀胱癌
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