JCO:HER2阳性转移性乳腺癌研究进展

2019-08-29 佚名 医学论坛网肿瘤

Pyrotinib或拉帕替尼联合卡培他滨治疗既往接受紫杉类、蒽环类和/或曲妥珠单抗治疗的HER2阳性转移性乳腺癌:随机,II期研究

8月20日美国临床肿瘤学杂志(JCO)在线发表了HER2阳性乳腺癌进展

Pyrotinib或拉帕替尼联合卡培他滨治疗既往接受紫杉类、蒽环类和/或曲妥珠单抗治疗的HER2阳性转移性乳腺癌:随机,II期研究

目的

Pyrotinib是一种不可逆转的泛ErbB抑制剂,在I期试验中显示出有希望的抗肿瘤活性和可接受的耐受性。我们在开放标签、多中心、随机II期研究中评估了pyrotinib与拉帕替尼联合卡培他滨治疗人表皮生长因子受体2(HER2)阳性转移性乳腺癌的疗效和耐受性。

方法

先前用紫杉类、蒽环类抗生素和/或曲妥珠单抗治疗HER2阳性复发或转移性乳腺癌的中国患者(1:1)每天口服1次400 mg pyrotinib或拉帕替尼1250 mg,连续21天,联合用药卡培他滨(第1至14天每天口服1000 mg / m2)。主要终点是由研究者根据“实体瘤疗效评价标准(RECIST 1.1)”评估的总体反应率。

结果

2015年5月29日至2016年3月15日期间,128名符合条件的患者被随机分配到pyrotinib(n = 65)或拉帕替尼(n = 63)治疗组。

pyrotinib组的总反应率为78.5%(95%CI,68.5%-88.5%),拉帕替尼组为57.1%(95%CI,44.9%-69.4%)(治疗差异,21.3%; 95%CI,4.0%-38.7%; P =0.01)。

使用pyrotinib的中位无进展生存期为18.1个月(95%CI,未达到13.9个月),拉帕替尼组为7.0个月(95%CI,5.6-9.8个月)(校正风险比0.36; 95%CI,0.23-0.58; P <0.001)。

最常见的3至4级不良事件是pyrotinib组16例(24.6%)、拉帕替尼组(20.6%)13例发生手足综合征;腹泻分别是10例(15.4%)、3例(4.8%); 中性粒细胞计数减少分别是6例(9.2%)和2例(3.2%)。

结论

对于先前用紫杉类、蒽环霉素和/或曲妥珠单抗治疗的HER2阳性转移性乳腺癌女性,在该随机II期试验中,与拉帕替尼加卡培他滨相比,吡啶替尼加卡培他滨在总体缓解率和无进展生存率方面具有统计学意义。

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    2019-09-21 lidong40
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由此可见,DCIS患者中HER2阳性的频率与IBC和HER2阳性DCIS患者相当,其与预后不良的特征相关。DCIS患者中大多数HER2过表达是由基因扩增所致。

阿斯利康靶向HER2的抗体药物偶联物在II期临床试验中显示出治疗前景

阿斯利康宣布其与Daiichi Sankyo联合开发的靶向的HER2抗体药物偶联物(ADC)治疗乳腺癌,已在II期试验中达到其主要终点。

新辅助用“曲帕”双靶,给年轻HER2阳性乳腺癌患者带来生存获益

降期、保乳和获得预后相关信息是目前新辅助治疗的主要目的。目前,对于HER2阳性早期乳腺癌,众多数据显示抗HER2治疗能够显着改善pCR率,给患者带来生存获益。HER2阳性乳腺癌是一种凶险程度很高的乳腺癌类型,在临床实践中,对于HER2阳性早期乳腺癌患者,若肿瘤>2cm,可以考虑尽早接受以曲妥珠单抗为基础的新辅助治疗,有望取得降期保乳,并给患者带来长期获益。