Health-related quality of life from HER2CLIMB-05: A phase 3 study of tucatinib versus placebo in combination with trastuzumab and pertuzumab as 1L maintenance therapy for HER2+ mBC
https://esmocongress.esmo.org
ESMO 2026
2026 年 10 月 23–27 日 · Madrid · 共 3154 条
tucatinib
★★★5 人 · 5 条 · 1 篇摘要
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Tucatinib是口服、高选择性的HER2酪氨酸激酶抑制剂,与拉帕替尼、奈拉替尼、吡咯替尼同属已在HER2阳性乳腺癌中确立地位的TKI家族,而中枢神经系统受累正是这一药物被寄予厚望的场景,因为既往治疗选择有限、预后较差[4]。其核心证据来自随机、双盲、安慰剂对照的HER2CLIMB试验:在既往已接受曲妥珠单抗、帕妥珠单抗和恩美曲妥珠单抗治疗的HER2阳性转移性乳腺癌患者中,于曲妥珠单抗联合卡培他滨基础上加用tucatinib,将1年无进展生存率从12.3%提高到33.1%(HR 0.54)[1];在291例脑转移患者的探索性分析中,颅内进展或死亡风险较对照组降低68%(HR 0.32)[2];随后的最终总生存分析随访至中位29.6个月[6]。
本次ESMO26上,Sarah Sammons报告了单臂II期BRIDGET试验:针对在全身治疗下出现孤立性颅内进展并接受SRS局部治疗的晚期HER2阳性乳腺癌患者,在继续原有HP(曲妥珠单抗/帕妥珠单抗)或T-DM1骨架的基础上加用tucatinib。共47例可评估患者,主要终点为按RANO-BM评估的颅内PFS(iPFS)。结果显示中位iPFS未达到,相较历史对照中位5个月,p<0.0001;6个月iPFS为91%,12个月为64%,18个月为59%;≥3级不良事件发生率为15%,颅外进展仅4.3%。研究达到主要终点,超过半数患者在18个月时仍无颅内进展。
相对HER2CLIMB所确立的在多线治疗后整体换用tucatinib联合曲妥珠单抗和卡培他滨的模式[1],BRIDGET回答的是一个更具体的问题:当只有脑部进展而颅外疾病仍被控制时,能否通过局部放疗加用tucatinib强化中枢控制、同时保留原本有效的全身方案。18个月时59%的iPFS与仅4.3%的颅外进展提示,这一部位特异性策略在保留原方案的同时维持了全身疗效,与tucatinib已被证实的颅内活性[2]相互印证,也体现了TKI类药物在中枢神经系统场景中的价值[4]。
当然,BRIDGET为单臂设计,样本量仅47例,以历史中位5个月为参照,中位iPFS尚未成熟,总生存等结局未披露,这一策略仍有待随机对照研究验证。
- 1.Tucatinib, Trastuzumab, and Capecitabine for HER2-Positive Metastatic Breast Cancer · N Engl J Med 2020
- 2.Intracranial Efficacy and Survival With Tucatinib Plus Trastuzumab and Capecitabine for Previously Treated HER2-Positive Breast Cancer With Brain Metastases in the HER2CLIMB Trial · J Clin Oncol 2020
- 3.Properties of FDA-approved small molecule protein kinase inhibitors: A 2021 update · Pharmacol Res 2021
- 4.HER2-positive breast cancer and tyrosine kinase inhibitors: the time is now · NPJ Breast Cancer 2021
- 5.Tucatinib plus trastuzumab for chemotherapy-refractory, HER2-positive, RAS wild-type unresectable or metastatic colorectal cancer (MOUNTAINEER): a multicentre, open-label, phase 2 study · Lancet Oncol 2023
- 6.Tucatinib versus placebo added to trastuzumab and capecitabine for patients with pretreated HER2+ metastatic breast cancer with and without brain metastases (HER2CLIMB): final overall survival analysis · Ann Oncol 2022
OncoAlert@OncoAlert Dra. María Natalia Gandur Quiroga@nataliagandur 引用@OncoAlert 4Sight Abstracts to be Presented at #ESMO26 BRIDGET: A Phase II Trial of Tucatinib Added to Trastuzumab/Pertuzumab or Ado-Trastuzumab Emtansine After Isolated Intracranial Progression in Patients With Advanced HER2-Positive Breast Cancer @drsarahsam @DrVanSwearingen @rashmikmurthy @CareyAnders1 🔬 Single-arm phase II (47 evaluable): tucatinib added to ongoing HP or T-DM1 after SRS for isolated intracranial progression in HER2+ MBC. Primary endpoint: iPFS (RANO-BM). ➡️ Median iPFS not reached; p<0.0001 vs historical median of 5 mo ➡️ iPFS 91% at 6 mo, 64% at 12 mo, 59% at 18 mo ➡️ Grade ≥3 AEs 15%; extracranial progression 4.3% ✅ Adding tucatinib to HP after radiation met the primary endpoint, with more than half of patients free of intracranial progression at 18 months. #BreastCancer 🎙️ Sarah Sammons 👥 Amanda Van Swearingen · Laura Noteware · Nusayba Bagegni · Kelly Moulton · Stevie Threatt · Denise Jaggers · Shannon Shea · Eric Lipp · Erin Riley · Sin-Ho Jung · Gloria Broadwater · Masey Ross · Kimberly Strickland · Sasha Beyer · Alison Conlin · Aki Morikawa · Rashmi Murthy · Carey Anders (4Sight Made from Abstracts publicly available at the ESMO website) Pinging OncoAlert Breast Cancer Faculty @matteolambe @aftimosp @E_de_Azambuja @DrSGraff @ErikaHamilton9 @hoperugo @stolaney1 @BianchiniGP @aftimosp @kevinpunie @ElisaAgostinett @to_be_elizabeth @GaiaGriguolo @JankovicK @raalbany @JavierCortesMD @JaniceTNBCmets @Prof_Nadia_H @LoiSher @jamecancerdoc @Lucarecco @Dr_Oncologista @guiandri76
Dana-Farber’s Breast Oncology Center@DFCI_BreastOnc Juliano A Moreira@mjuliano77 HERTOCLIMB tucatinib维持治疗 #ESMO2026 生活质量恶化
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