Abstract
Treatment (Tx) patterns, efficacy and safety of eribulin for advanced and heavily pretreated breast cancer (ABC): Updated results from a single-center, real-world study.
Author
person
Jiao Yang
Department of Medical Oncology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, China
info_outline
Jiao Yang, Xinyue Ma, Shidi Zhao, Xiaoai Zhao, Le Wang, Danfeng Dong, Jin Yang
Full text
Authors
person
Jiao Yang
Department of Medical Oncology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, China
info_outline
Jiao Yang, Xinyue Ma, Shidi Zhao, Xiaoai Zhao, Le Wang, Danfeng Dong, Jin Yang
Organizations
Department of Medical Oncology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, China, Department of Medical Oncology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China, Department of Medical Oncology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
Abstract Disclosures
Research Funding
Wu Jieping Medical Foundation No. HX202167
Background:
We evaluated the Tx patterns, efficacy and safety of eribulin for heavily pretreated ABC in real-world practice. Previous results were reported at the 2023 ASCO (e13118), updated results for longer follow-up and additional enrollment are presented here.
Methods:
Patients (pts) with ABC who had progression on anthracycline taxane Tx and received eribulin (1.4 mg/m
2
IV on Days 1 and 8 of a 21-day cycle) between April 2020 and October 2023 were enrolled. Response was evaluated using RECIST v1.1. Pts were considered as taxanes sensitive if taxanes treatment duration of last line use exceeds 6 months, otherwise were considered as taxanes resistant.
Results:
89 pts were enrolled. Median (range) age was 54 (30–79) years; 80.9% had an Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0–1, and 40.4% pts had a median of 3 prior lines of chemotherapy. 67.4% of pts had Ki67 >30% and 46.0% had HR+/HER2− disease. 88.7% of pts had visceral metastasis. Eribulin was monotherapy in 30.3% of pts, and combined with bevacizumab, capecitabine, bevacizumab + capecitabine, and anti-HER2 agents in 28.1%, 9.0%, 3.4%, and 25.8%, respectively. The objective response rate was 22.5%; disease control rate was 84.3%. Median progression-free survival (PFS) overall was 6.0 (95% CI, [3.5–8.5]) months (mo). Univariate analysis indicated pts with HER2+ disease had longer PFS than pts with HR+/HER2− or triple-negative BC (median, 13.5, 4.5, and 3.7 mo, respectively;
P
= 0.011; Table). Pts with Ki67 expression ≤30% had longer PFS than pts with Ki67 >30% (median, 8.0 vs. 4.0 mo;
P
= 0.02). Pts with grade I-II had longer PFS than pts with grade III (median, 10.5 vs. 4.0 mo;
P
= 0.003). Pts sensitive to Taxane had longer PFS than pts resistant to Taxane (median, 8.0 vs. 4.0 mo;
P
= 0.007). Among the 18 pts with a partial response, median PFS was 11.4 mo. The most common adverse events were leukopenia (44.9%), neutropenia (37.1%) and anemia (36.0%). Neurotoxicity was rare (6.7%).
Conclusions:
In this single-center study of pts with heavily pre-treated ABC in China, eribulin Tx resulted in favorable PFS irrespective of molecular subtype, with a manageable safety profile. In pts with a large tumor burden and a good PS, eribulin-based combinations may further improve outcomes.
Univariate analysis of PFS.
Variable
Pts, n (%)
Median PFS (95%CI)
HR (95%CI)
P
Molecular subtype: HER2+
23 (25.8%)
13.5 (6.7-20.3)
Ref
0.011
Molecular subtype: HR+HER2−
41 (46.0%)
4.5 (3.4-5.6)
2.21 (1.15–4.29)
Molecular subtype: TNBC
25 (28.2%)
3.7 (2.0-5.4)
2.91 (1.35–6.26)
Ki67: ≤30%
29 (32.6%)
8.0 (6.0-10.0)
Ref
0.020
Ki67: >30%
60 (67.4%)
4.0 (2.9-5.1)
1.89 (1.08–3.33)
Grade: I-II
26 (29.2%)
10.5 (7.9-13.1)
Ref
0.003
Grade: III
63 (70.8%)
4.0 (3.1-4.9)
2.44 (1.30–4.76)
Taxane sensitive
45 (50.6%)
4.0 (1.2-6.8)
Ref
0.007
Taxane resistant
44 (49.4%)
8.0 (3.0-13.0)
2.00 (1.18–3.33)
1 organization
6 drugs
7 targets
Drug
eribulinDrug
bevacizumabDrug
capecitabineDrug
anthracyclinesDrug
taxaneDrug
anti-HER2 agentsTarget
taxaneTarget
Topoisomerase IITarget
DNATarget
microtubulesTarget
VEGF and c-MET pathwaysOrganization
Jiaotong UniversityTarget
HER2 (ERBB2)