NEJM:Palbociclib+来曲唑治疗可显著延长晚期乳腺癌患者的无进展生存期

2016-11-17 MedSci MedSci原创

一项2期研究显示,在绝经后女性雌激素受体(ER)–阳性、人表皮生长因子受体2(HER2)–阴性晚期乳腺癌患者中,与单独来曲唑的初始治疗,palbociclib加来曲唑可延长无进展生存期。

一项2期研究显示,在绝经后雌激素受体(ER)–阳性、人表皮生长因子受体2(HER2)–阴性晚期乳腺癌患者中,与单独来曲唑的初始治疗相比,palbociclib加来曲唑可延长患者的无进展生存期。研究人员开展了一项3期研究旨在确认palbociclib联合来曲唑治疗该疾病的疗效和安全数据。

在这项双盲研究中,研究人员以2:1的比例随机分配666例绝经后ER阳性、HER2阴性乳腺癌以及未接受过晚期疾病治疗的患者,接受palbociclib加来曲唑或安慰剂加来曲唑治疗。主要终点是无进展生存期,由研究者评估;次要终点是总生存期,客观反应,临床受益反应,患者报告的结果,药代动力学效应和安全性。

Palbociclib-来曲唑组患者的中位无进展生存期为24.8个月(95%置信区间[CI],22.1至不可估计),而安慰剂-来曲唑组为14.5个月(95%CI,12.9至17.1)(疾病进展或死亡的危险比,0.58;95%CI,0.46至0.72;P<0.001)。最常见的3或4级不良事件是中性粒细胞减少(palbociclib-来曲唑组的发生率为66.4%,安慰剂-letrozole组为1.4%),白细胞减少(24.8% vs 0%),贫血(5.4% vs 1.8%)和疲劳(1.8% vs 0.5%)。在palbociclib-来曲唑组中1.8%的患者发生中性粒细胞减少性发热,而在安慰剂-来曲唑组中没有患者发生中性粒细胞减少性发热。palbociclib-来曲唑组中的43例患者(9.7%)和安慰剂-来曲唑组中的13例患者(5.9%)因发生不良事件永久停止任何研究治疗。

在以前未治疗的ER阳性、HER2阴性晚期乳腺癌患者中,palbociclib结合来曲唑治疗的无进展生存期显著长于单独使用来曲唑治疗的患者,但palbociclib-来曲唑治疗导致的骨髓毒性效应发生率更高。

原始出处:

Richard S. Finn,Miguel Martin,Hope S. Rugo,et al.Palbociclib and Letrozole in Advanced Breast Cancer. NEJM.2016.11.17

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    2016-11-18 siiner
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目的:细胞周期的G1-S检查点在乳腺癌中异常表达。Palbociclib(PD0332991)是一种口服CDK4/6抑制剂。 基于临床前/I期临床活性,我们对palbociclib用于晚期乳腺癌进行了单组II期临床试验。 实验设计:符合条件的患者经过组织学证实为转移性阳性视网膜母细胞瘤(Rb)乳腺癌以及重大疾病。Palbociclib在28天的周期里1-21日口服给药125毫克。主要指标是肿瘤反

NEJM:palbociclib对激素受体阳性的晚期乳腺癌患者的疗效

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

ASCO 2015:Palbociclib 改善乳腺癌PFS(PALOMA-3试验)

PALOMA-3 Ⅲ期临床研究经独立小组分析显示达到其主要研究终点而被提前终止。该研究显示Palbociclib可显著改善HR+ / HER2- 乳腺癌患者">乳腺癌患者的无进展生存(PFS)期。这是首个报道的关于CDK 4 / 6抑制剂随机Ⅲ期临床的数据。多中心PALOMA-3研究随机入组521例转移性乳腺癌患者,这些患者在内分泌治疗进展后以2:1比例随机入组氟维司群(FASLODEX)+