智通财经APP获悉，1月27日，第一三共与阿斯利康(AZN.US)宣布Enhertu（德曲妥珠单抗）的补充生物制品许可申请（sBLA）获FDA批准，用于单药治疗在转移性环境中接受过至少一种内分泌治疗的不可切除或转移性HER2低表达（IHC 1+或IHC 2+/ISH-）或HER2超低表达（IHC 0）乳腺癌成人患者。
FDA此次批准主要是基于III期DESTINY-Breast06研究的积极结果。该研究是一项全球性、多中心、随机、开放标签、对照临床试验（n=866），评估了Enhertu（5.4mg/kg）与标准治疗（卡培他滨、紫杉醇、紫杉醇白蛋白）在接受内分泌治疗后疾病进展的HR阳性、HER2低表达或HER2超低表达转移性乳腺癌患者中的有效性与安全性。
结果显示，在总人群中，Enhertu组患者的中位PFS相比标准治疗组显著延长（13.2 vs. 8.1个月，HR=0.63，P<0.0001），OS达到12个月的患者比例更高（87.0% vs. 81.1%，HR=0.81），确认的客观缓解率也更高（57.3% vs. 31.2%）。
目前，Enhertu是唯一一款获批用于治疗HER2低表达乳腺癌和HER2超低表达乳腺癌患者的疗法。
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