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Peri-operative atezolizumab in early-stage triple-negative breast cancer: final results and ctDNA analyses from the randomized phase 3 IMpassion031 trial
Nature Medicine ( IF 58.7 ) Pub Date : 2025-06-04 , DOI: 10.1038/s41591-025-03725-4
Elizabeth A. Mittendorf, Zoe June Assaf, Nadia Harbeck, Hong Zhang, Shigehira Saji, Kyung Hae Jung, Roberto Hegg, Andreas Koehler, Joohyuk Sohn, Hiroji Iwata, Melinda L. Telli, Cristiano Ferrario, Kevin Punie, Aditi Qamra, Max Dieterich, Yun Xu, Mario Liste-Hermoso, Esther Shearer-Kang, Luciana Molinero, Stephen Y. Chui, Carlos H. Barrios

Previously published results demonstrated that the randomized phase 3 IMpassion031 trial met its primary objective: adding atezolizumab to neoadjuvant chemotherapy significantly improved pathologic complete response (pCR) rate in patients with stage II/III triple-negative breast cancer (TNBC). Here we report the prespecified final analysis of the secondary endpoints with 3 years’ follow-up, together with exploratory analyses of circulating tumor (ct)DNA. Patients with previously untreated stage II/III TNBC enrolled in 75 academic and community sites in 13 countries were randomized 1:1 to receive neoadjuvant chemotherapy with either peri-operative atezolizumab (n = 165) or preoperative placebo (n = 168). Descriptive secondary endpoints included event-free, disease-free and overall survival. Long-term outcomes favored the atezolizumab group (event-free survival hazard ratio (HR), 0.76; 95% confidence interval (CI), 0.47–1.21; disease-free survival HR, 0.76; 95% CI, 0.44–1.30; overall survival HR, 0.56; 95% CI, 0.30–1.04). Among patients without pCR, 14 of 70 (20%) atezolizumab-treated and 33 of 99 (33%) placebo-treated patients received additional adjuvant therapy, frequently capecitabine. In exploratory biomarker analyses, patients with baseline ctDNA-negative status (6%) had excellent long-term outcomes. Most patients (87%) had cleared ctDNA at surgery. ctDNA-positive status at surgery identified a subset of non-pCR patients with poorest prognosis. Long-term safety was consistent with primary results. These data show that adding atezolizumab to chemotherapy for stage II/III TNBC is associated with favorable long-term outcomes, and ctDNA dynamics provide prognostic value beyond pCR. ClinicalTrials.gov identifier: NCT03197935.



中文翻译:

早期三阴性乳腺癌的围手术期 atezolizumab:随机 3 期 IMpassion031 试验的最终结果和 ctDNA 分析

先前发表的结果表明,随机 3 期 IMpassion031 试验达到了其主要目标:在新辅助化疗中加入 atezolizumab 显着改善了 II/III 期三阴性乳腺癌 (TNBC) 患者的病理完全缓解 (pCR) 率。在这里,我们报告了次要终点的预定最终分析和 3 年随访,以及循环肿瘤 (ct) DNA 的探索性分析。在 13 个国家的 75 个学术和社区站点入组的既往未经治疗的 II/III 期 TNBC 患者以 1:1 的比例随机接受围手术期 atezolizumab (n = 165) 或术前安慰剂 (n = 168) 的新辅助化疗。描述性次要终点包括无事件生存期、无病生存期和总生存期。长期结局有利于阿替利珠单抗组(无事件生存风险比 (HR),0.76;95% 置信区间 (CI),0.47-1.21;无病生存率 HR,0.76;95% CI,0.44-1.30;总生存期 HR,0.56;95% CI,0.30-1.04)。在无 pCR 的患者中,70 例 (20%) 阿替利珠单抗治疗患者中有 14 例 (20%) 和 99 例安慰剂治疗患者中有 33 例 (33%) 接受了额外的辅助治疗,通常是卡培他滨。在探索性生物标志物分析中,基线 ctDNA 阴性状态 (6%) 的患者具有良好的长期结果。大多数患者 (87%) 在手术中清除了 ctDNA。手术时 ctDNA 阳性状态确定了预后最差的非 pCR 患者亚群。长期安全性与主要结果一致。这些数据表明,在 II/III 期 TNBC 的化疗中加入 atezolizumab 与良好的长期结果相关,并且 ctDNA 动力学提供了超越 pCR 的预后价值。ClinicalTrials.gov 标识符:NCT03197935。

更新日期:2025-06-04
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