Clinicopathological and prognostic features of HER2-null and HER2-low advanced breast cancer treated with eribulin or capecitabine.

IF 4 3区医学 Q1 OBSTETRICS & GYNECOLOGY Breast Cancer Pub Date : 2024-11-01 Epub Date: 2024-08-14 DOI:10.1007/s12282-024-01617-y

Rui Kitadai, Tatsunori Shimoi, Shu Yazaki, Hitomi Sumiyoshi Okuma, Mai Hoshino, Munehiro Ito, Ayumi Saito, Shosuke Kita, Yuki Kojima, Tadaaki Nishikawa, Kazuki Sudo, Emi Noguchi, Yasuhiro Fujiwara, Masayuki Yoshida, Kan Yonemori

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Abstract

Background: HER2-low populations constitute a heterogeneous group, and the cytotoxic anticancer agent efficacy based on HER2 status remains unclear. This study evaluated the clinicopathological features and outcomes of patients with advanced breast cancer showing HER2-low expression treated with eribulin or capecitabine, two treatment options after anthracycline and taxane treatment.

Methods: We retrospectively evaluated patients who were treated with eribulin or capecitabine between 2011 and 2015. HER2 status was evaluated according to the ASCO/CAP guidelines.

Results: No significant difference was observed in overall survival (OS; eribulin: hazard ratio [HR], 0.66; 95% CI 0.40-1.10; capecitabine: HR, 0.76; 95% CI 0.45-1.30) or progression-free survival (PFS; eribulin: HR, 1.13; 95% CI 0.72-1.78; capecitabine: HR, 0.90; 95% CI 0.56-1.44) between patients receiving eribulin (HER2-null: 35, HER2-low: 44) and those receiving capecitabine (HER2-null: 41, HER2-low: 33). Subgroup analysis revealed no significant differences in OS between the two groups in the hormone-positive and -negative populations for eribulin and capecitabine. HER2-null and HER2-low patients showed objective response rates (ORRs) of 22.5% and 9.1% (p = 0.09) overall, and 32.0% and 10.5% (p = 0.03), respectively, in hormone-positive cases among eribulin-treated patients. No response was observed in hormone-negative patients. Capecitabine treatment in HER2-null and HER2-low patients had overall ORRs of 26.8% and 15.2% (p = 0.23), respectively, with 27.3% and 16.1% (p = 0.28) for hormone-positive cases; and 25.0% and 0% (p = 1.0), respectively, for hormone-negative cases.

Conclusions: Eribulin and capecitabine sensitivity may vary based on HER2 expression in patients with HER2-low and HER2-null breast cancer. Prognosis was similar between the HER2-low and the HER2-null groups.

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接受艾瑞布林或卡培他滨治疗的HER2缺失和HER2低下晚期乳腺癌的临床病理和预后特征。

背景：HER2低表达人群是一个异质性群体，基于HER2状态的细胞毒性抗癌药物疗效仍不明确。本研究评估了HER2低表达晚期乳腺癌患者接受艾瑞布林或卡培他滨治疗后的临床病理特征和预后：我们对2011年至2015年间接受艾瑞布林或卡培他滨治疗的患者进行了回顾性评估。根据ASCO/CAP指南评估HER2状态：总生存率（OS；埃瑞布林：危险比[HR]，0.66；95% CI 0.40-1.10；卡培他滨：HR，0.76；95% CI 0.40-1.10）无明显差异：HR，0.76；95% CI，0.45-1.30）或无进展生存期（PFS，埃瑞布林：HR，1.13；95% CI，0.72-1.78；卡培他滨：HR，0.90；95% CI，0.72-1.78）有显著差异：HR，0.90；95% CI，0.56-1.44）之间的差异。亚组分析显示，在激素阳性和阴性人群中，埃瑞布林和卡培他滨两组的OS无明显差异。HER2空值和HER2低值患者的客观反应率（ORR）分别为22.5%和9.1%（P = 0.09），在埃瑞布林治疗的患者中，激素阳性病例的客观反应率（ORR）分别为32.0%和10.5%（P = 0.03）。在激素阴性患者中未观察到反应。HER2-null和HER2-low患者接受卡培他滨治疗的总ORR分别为26.8%和15.2%（p = 0.23），激素阳性病例分别为27.3%和16.1%（p = 0.28）；激素阴性病例分别为25.0%和0%（p = 1.0）：结论：HER2-低表达和HER2-无效乳腺癌患者对伊瑞布林和卡培他滨的敏感性可能因HER2表达而异。HER2低表达组和HER2无效组的预后相似。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Breast Cancer ONCOLOGY-OBSTETRICS & GYNECOLOGY

CiteScore

6.70

自引率

2.50%

发文量

105

审稿时长

6-12 weeks

期刊介绍： Breast Cancer, the official journal of the Japanese Breast Cancer Society, publishes articles that contribute to progress in the field, in basic or translational research and also in clinical research, seeking to develop a new focus and new perspectives for all who are concerned with breast cancer. The journal welcomes all original articles describing clinical and epidemiological studies and laboratory investigations regarding breast cancer and related diseases. The journal will consider five types of articles: editorials, review articles, original articles, case reports, and rapid communications. Although editorials and review articles will principally be solicited by the editors, they can also be submitted for peer review, as in the case of original articles. The journal provides the best of up-to-date information on breast cancer, presenting readers with high-impact, original work focusing on pivotal issues.