Lancet oncol:Ipatasertib联合紫杉醇对转移性三阴性乳腺癌的治疗效果。

2017-08-09 qinqiyun MedSci原创

三阴性乳腺癌是指癌组织免疫组织化学检查结果为雌激素受体(ER)、孕激素受体(PR)和原癌基因Her-2均为阴性的乳腺癌。这类乳腺癌占所有乳腺癌病理类型的10.0%~20.8%,具有特殊的生物学行为和临床病理特征,预后较其他类型差。

三阴性乳腺癌是指癌组织免疫组织化学检查结果为雌激素受体(ER)、孕激素受体(PR)和原癌基因Her-2均为阴性的乳腺癌。这类乳腺癌占所有乳腺癌病理类型的10.0%~20.8%,具有特殊的生物学行为和临床病理特征,预后较其他类型差。

背景:口服AKT抑制剂ipatasertib被研发用于治疗PI3K/AKT信号通路激活高发生率的癌症,包括三阴性乳腺癌。现LOTUS试验探究紫杉醇联合ipatasertib作三阴性乳腺癌的一线治疗方案的效果。

方法:2014年9月2日-2016年2月4日,进行一随机、安慰剂对照、双盲的2期临床试验,在多个国家的44家医院招募166位未经系统治疗的患有可测量、无法手术、局部晚期或转移性的三阴性乳腺癌的年满18岁的女性。124位参与试验,随机分组(1:1),实验组(紫杉醇+ ipatasertib)62人,对照组(紫杉醇+安慰剂)62人,分别予以静滴紫杉醇80mg/m2(第1/8/15天)、400mg ipatasertib或安慰剂(第1-21天),28天一疗程,直到病程恶化或出现不能耐受的毒副反应。根据已用辅助治疗、化疗间隔、肿瘤PTEN状态进行分层。评估终点是意向治疗人群中无进展生存期和PTEN低水平人群中无进展生存期。

结果:随访的中位时间,实验组是10.4个月(IQR6.5-14.1)。对照组是10.2个月(6.0-13.6)。意向治疗人群中无进展生存期的中位数,实验组是6.2个月(95% CI3.8-9.0),对照组是4.9个月(3.6-5.4);PTEN低水平的48名患者中无进展生存期的中位数,实验组是6.2个月(95% CI 3.6-9.1),对照组是3.7个月(1.9-7.3)。最常见的3级或更严重的不良事件是腹泻(实验组14人[23%],对照组0人)、中性粒细胞减少(5人[8%]比4人[6%])和中性粒细胞减少症(6人[10%]比1人[2%])。实验组无结肠炎、4级腹泻或治疗相关死亡。对照组有一例治疗相关性死亡。严重不良事件实验组有17例(28%),对照组有9例(15%)。

意义:接受ipatasertib治疗的人群无进展生存期长于接受安慰剂治疗的人群。本研究是首次证实AKT靶点疗法可用于三阴性乳腺癌。

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    2017-11-30 howi
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    2017-08-26 minlingfeng
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    2017-08-10 bbjsj_1981

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