JCO:不建议厄洛替尼联合贝伐单抗用于晚期NSCLC维持治疗

2013-10-21 ecoliDH5 丁香园

研究要点:1.既往研究表明,厄洛替尼联合贝伐单抗策略具有较好的耐受性及抗肿瘤活性;本研究旨在评价含贝伐单抗一线化疗后,厄洛替尼联合贝伐单抗维持治疗晚期NSCLC的潜在获益情况。2.研究表明,厄洛替尼联合贝伐单抗方案可显著改善患者PFS,但不能显著改善患者OS。3.总体而言,患者耐受性良好;维持治疗方案对生存结局影响较小,且毒性增加。在2013年10月7日在线出版的《临床肿瘤学杂志》(Journ




患者PFS结局


研究要点:

1.既往研究表明,厄洛替尼联合贝伐单抗策略具有较好的耐受性及抗肿瘤活性;本研究旨在评价含贝伐单抗一线化疗后,厄洛替尼联合贝伐单抗维持治疗晚期NSCLC的潜在获益情况。

2.研究表明,厄洛替尼联合贝伐单抗方案可显著改善患者PFS,但不能显著改善患者OS。

3.总体而言,患者耐受性良好;维持治疗方案对生存结局影响较小,且毒性增加。

在2013年10月7日在线出版的《临床肿瘤学杂志》(Journal of Clinical Oncology)上,美国Dana-Farber癌症研究所Bruce E. Johnson博士等人发表了ATLAS临床III期试验的结果,该研究旨在评价含贝伐单抗一线化疗后,厄洛替尼联合贝伐单抗维持治疗晚期非小细胞肺癌(NSCLC)的潜在获益情况。【原文下载】

在本研究中,1145例经组织学或细胞学确认的NSCLC患者(出现恶性胸腔积液的IIIB期患者、IV期患者、或复发患者)接受了4个周期的化疗联合贝伐单抗方案治疗。743例未出现病情进展或显著毒性事件的患者接受了随机分配(1:1),分别接受贝伐单抗联合安慰剂或厄洛替尼治疗。研究主要终点为无进展生存期(PFS)。

研究结果表明,随机分配后,贝伐单抗/安慰剂组患者的中位PFS为3.7个月,贝伐单抗/厄洛替尼组患者为4.8个月。贝伐单抗/安慰剂组与贝伐单抗/厄洛替尼组患者的中位总生存期分别为13.3个月与14.4个月。总体而言,后者化疗阶段的不良事件(AE)更多,3级与4级AE更多(主要为皮疹与腹泻),严重AE更多,与贝伐单抗/安慰剂组相比,贝伐单抗/厄洛替尼组患者中导致停止厄洛替尼/安慰剂用药的AE更多。

该研究表明,厄洛替尼联合贝伐单抗方案可显著改善患者PFS,但不能显著改善患者OS。尽管总体而言,患者耐受性良好,但作者认为,厄洛替尼联合贝伐单抗维持治疗方案只对生存结局有轻度影响,而且毒性增加,这表明该两药联合方案不会成为一种新的后化疗阶段常规治疗手段。

研究背景:

贝伐单抗是一种血管内皮生长因子特异性抗体,美国东部肿瘤协作组(ECOG) E4599研究表明,该药联合双药化疗后,可显著延长患者无进展生存期(PFS)与总生存期(OS),阿瓦斯汀治疗肺部肿瘤(AVAiL)研究也表明,该方案可延长患者PFS。美国食品药品管理局与欧洲药品管理局批准该方案用于无咳血症状的晚期非鳞状非小细胞肺癌(NSCLC)患者治疗。

BR.21试验结果表明,与安慰剂相比,表皮生长因子受体(EGFR)酪氨酸激酶抑制剂厄洛替尼(特罗凯; F. 霍夫曼-La罗氏公司生产)二线及三线治疗晚期NSCLC患者可取得OS获益,根据该结果,该药获得了美国食品药品管理局与欧洲药品管理局批准。然而,目前肺癌患者的长期预后情况仍不甚理想,经一线化疗成功控制肿瘤后,通过更为积极的维持治疗以延缓进展业已成为近期研究的一项课题。

由于贝伐单抗与厄洛替尼的靶点为肿瘤形成的不同分子通路(分别为血管内皮生长因子与EGFR),因此,一项I/II期试验对二者联合用于此前接受治疗的NSCLC患者进行了考察。研究未发现两药在其推荐剂量时存在意外的毒性或药物动力学相互作用。一项考察二线用药的随机性临床II期结果表明,尽管未达到贝伐单抗/厄洛替尼较化疗(培美曲塞或多西他赛)可取得具有临床意义PFS差异的预定主要终点,但联合用药方案仍可取得积极的临床活性,病情控制率达85%,并可略微延长患者PFS。

在近期贝伐单抗联合特罗凯(BeTa)治疗晚期NSCLC患者的临床III期研究中,尽管贝伐单抗联合厄洛替尼二线治疗策略未能达到改善OS的主要终点,但却取得了积极的PFS获益(中位时间, 3.4 v 1.7个月)。整体而言,此类研究均表明,厄洛替尼联合贝伐单抗策略具有较好的耐受性及积极的抗肿瘤活性,因此,可成为维持治疗晚期NSCLC的一个待评价合理治疗方案。

原文检索:

Johnson BE, Kabbinavar F, Fehrenbacher L, Hainsworth J, Kasubhai S, Kressel B, Lin CY, Marsland T, Patel T, Polikoff J, Rubin M, White L, Yang JC, Bowden C, Miller V.ATLAS: Randomized, Double-Blind, Placebo-Controlled, Phase IIIB Trial Comparing Bevacizumab Therapy With or Without Erlotinib, After Completion of Chemotherapy, With Bevacizumab for First-Line Treatment of Advanced Non-Small-Cell Lung Cancer.J Clin Oncol. 2013 Oct7.【原文下载】

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