Eur J Cancer:依维莫司联合芳香酶抑制剂是否可用作转移性乳腺癌的维持治疗?

2021-07-11 MedSci原创 MedSci原创

内分泌治疗是激素受体阳性 (HR+)/HER2- 转移性乳腺癌的主要治疗方法

虽然内分泌治疗是激素受体阳性 (HR+)/HER2- 转移性乳腺癌的主要治疗方法,但有内脏危象风险或内分泌治疗敏感性不足的患者需要接受一线化疗。在化疗停止时通常予以激素维持治疗。MAINtenance Afinitor研究是一项随机的III期试验,对比了维持依维莫司联合芳香酶抑制剂(AI)与AI单药治疗用于一线化疗后病情得以控制的转移性乳腺癌的效果。

招募了经一线化疗后病情稳定的、获得了部分缓解或完全缓解的ER+/HER2-转移性乳腺癌患者,随机分成了两组,接受依维莫司联合AI(依西美坦或来曲唑或阿那曲唑)或单纯AI治疗。主要终点是无进展生存期(PFS)。次要终点包括缓解率、安全性和总生存期。

两组的PFS和OS

总体上,共有110位患者被随机分至两组:依维莫司+AI组 52位,AI组 58位。依维莫司+AI组和AI组的中位PFS分别是11.0个月和7.2个月(风险比[HR] 0.71, 95%CI 0.47-1.06)。依维莫司+AI组和AI组的客观缓解率分别是22.4%和19.2%。AI单药治疗组中报告了更高比例的疾病进展率(28.8% vs 14.3%)。联合组的中位OS是35.7个月(95%CI 26.0-47.8),单药组的中位OS是33.5个月(95%CI 26.4-42.7;HR 1.0, 95%CI 0.61-1.62)。

综上所述,依维莫司联合AI并未较单用AI显著改善一线化疗后的转移性乳腺癌患者的预后。同时考虑到治疗耐受性,内分泌维持治疗仍然是这类患者的标准疗法。

原始出处:

Guarneri Valentina,Giorgi Carlo Alberto,Cinieri Saverio et al. Everolimus plus aromatase inhibitors as maintenance therapy after first-line chemotherapy: Final results of the phase III randomised MAIN-A (MAINtenance Afinitor) trial.[J] .Eur J Cancer, 2021, 154: 21-29.

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    2021-10-27 jklm09
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