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NEJM:palbociclib对激素受体阳性的晚期乳腺癌患者的疗效

2015-06-02 崔倩 译 MedSci原创

背景:激素受体阳性的乳腺癌细胞的生长依赖于细胞周期蛋白依赖性激酶4和6(CDK4和CDK6),其推动细胞周期从G1期向S期发展。研究人员评估palbociclib(CDK4、CDK6抑制剂)和氟维司群对晚期乳腺癌的疗效。方法:这项3期研究涉及521例晚期激素受体阳性、复发过的人表皮生长因子受体2阴性乳腺癌,或在之前的内分泌治疗中有进展的患者。研究人员按2:1的比例随机分配患者接受palbocicl

背景:激素受体阳性的乳腺癌细胞的生长依赖于细胞周期蛋白依赖性激酶4和6(CDK4和CDK6),其推动细胞周期从G1期向S期发展。研究人员评估palbociclib(CDK4、CDK6抑制剂)和氟维司群对晚期乳腺癌的疗效。

方法:这项3期研究涉及521例晚期激素受体阳性、复发过的人表皮生长因子受体2阴性乳腺癌,或在之前的内分泌治疗中有进展的患者。研究人员按2:1的比例随机分配患者接受palbociclib和氟维司群或安慰剂和氟维司群治疗。同时,绝经前或围绝经期妇女也接受戈舍瑞林。主要终点是无进展生存期的调查评估。次要终点包括总生存期,客观反应,临床受益率,患者报告的临床结局,以及安全性。预先计划的中期分析是由一个独立的数据和安全监测委员会经过195疾病进展或死亡的事件发生后完成的。

结果:palbociclib-氟维司群的中位无进展生存期为9.2个月(95%可信区间[Cl],7.5-不可估计),安慰剂-氟维司群为3.8个月(95% Cl,3.5-5.5)(疾病进展或死亡风险比,0.42;95% Cl,0.32-0.56;P<0.001)。palbociclib-氟维司群组中最常见的3级或4的不良事件是中性粒细胞减少(62%,而安慰剂–氟维司群组为0.6%),白细胞减少(25.2% vs 0.6%),贫血(2.6% vs 1.7%),血小板减少(2.3% vs 0%),疲劳(2% vs 1.2%)。发热性中性粒细胞减少,palbociclib治疗的患者为0.6%,安慰剂治疗的患者为0.6%。由于不良事件而停药palbociclib组为2.6%,安慰剂组为1.7%。
    
结论:激素受体阳性的转移性乳腺癌,并且在之前的内分泌治疗有疾病进展的患者中,使用palbociclib联合氟维司群治疗比单纯的氟维司群治疗有更长的无进展生存期。

原始出处:

Nicholas C. Turner,Jungsil Ro,Fabrice André,Sherene Loi,et al.Palbociclib in Hormone-Receptor–Positive Advanced Breast Cancer,NEJM,2015.6.1


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