Clin Cancer Res:PATRICIA试验:Palbociclib联合曲妥珠单抗治疗HER2阳性晚期乳腺癌

2020-11-19 MedSci原创 MedSci原创

曲妥珠单抗、帕妥珠单抗和T-DM1的可及显著改善了晚期HER2阳性乳腺癌的生存预后。然而,转移性HER2阳性乳腺癌仍是一种威及生命的肿瘤。因此,需要探究新的治疗策略和分子生物标志物来进一步改善患者预后

曲妥珠单抗、帕妥珠单抗和T-DM1的可及显著改善了晚期HER2阳性乳腺癌的生存预后。然而,转移性HER2阳性乳腺癌仍是一种威及生命的肿瘤。因此,需要探究新的治疗策略和分子生物标志物来进一步改善患者预后。

PATRICIA研究是一项前瞻性、开放标签的多中心II期试验,旨在评估帕博西尼(Palbociclib)+曲妥珠单抗联合或不联合内分泌疗法治疗HER2阳性晚期乳腺癌患者的疗效和安全性。

该研究基于Simon两阶段设计分成了三个队列:队列A:雌激素受体(ER)阴性;队列B:ER阳性;队列C:ER阳性+来曲唑。ER阳性患者被进一步分至队列B1或队列B2。帕博西尼用药方案:200mg/日,用两周停一周。主要终点是6个月时的无进展存活率(PFS6)。次要终点包括安全性和PAM50内在亚型的评估。

共招募了71位患者(队列A、B、C三组分别有15人、28人和28人)。队列A、B1、B2的PFS6分别是33.3%(5/15)、42.8%(12/28)和46.4%(13/28)。1-2级和3-4级毒性反应分别发生于97.7%和84.4%的患者。最常见的3-4级毒性反应为中性粒细胞减少(66.4%)和血小板减少症(11.3%)。至于PAM50,剖析了59例(83.1%)肿瘤。与非管腔型相比,发现由PAM50定义的管腔型乳腺癌与更长的PFS独立相关(中位PFS:10.6 vs 4.2个月,p=0.003)。

帕博西尼与曲妥珠单抗联合使用安全性好,而且在曲妥珠单抗预处理的管腔A或B亚型ER阳性/HER2阳性晚期乳腺癌中显示出有较好的生存预后。因在该患者群中开展了一项新的随机试验,该试验提前停止招募患者。

原始出处:

Eva Ciruelos, et al. Palbociclib and Trastuzumab in HER2-Positive Advanced Breast Cancer: Results from the Phase II SOLTI-1303 PATRICIA Trial. Clin Cancer Res November 15 2020 26 (22) 5820-5829; DOI:10.1158/1078-0432.CCR-20-0844

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