Phase II clinical study of eribulin monotherapy in Japanese patients with metastatic breast cancer who had well-defined taxane resistance.

Abstract

No clinical evidence on the efficacy and safety of eribulin monotherapy has been obtained by a prospective clinical study in patients with metastatic breast cancer (MBC) who had well-defined taxane resistance. The present Phase II, multicenter, single-arm, open-label study aimed to obtain the evidence. Japanese female patients, aged 33-74 years who had the metastasis of taxane-resistant and histopathologically confirmed breast cancer, received eribulin mesylate 1.4 mg/m(2) (equivalent to eribulin 1.23 mg/m(2) [expressed as free base]) as a 2- to 5-min intravenous infusion on days 1 and 8 of each 21-day cycle. The primary endpoint was the clinical benefit rate (CBR) [complete response (CR), partial response (PR), and long-term stable disease (LSD) ≥24 weeks]. A total of 51 patients underwent chemotherapy cycles (median 4; range 1-42 cycles). The CBR was 39.2 % (CR 2.0 %; PR 23.5 %; and LSD 13.7 %), and the rate of progressive disease was 49.0 %. The median progression-free survival and the median overall survival were 3.6 months [95 % confidence interval (CI) 2.6-4.6 months] and 11.7 months (95 % CI 9.2-14.2 months), respectively. Grade 3 or greater adverse events were leukopenia (23.5 %), neutropenia (35.3 %), anemia (5.9 %), and febrile neutropenia (7.8 %). The incidences of grade 3 and 4 peripheral sensory neuropathy were 2.0 and 0 %, respectively. Eribulin showed a clinically manageable tolerability profile by dose adjustments or symptomatic treatment. Eribulin was effective and well tolerated in heavily pretreated patients with MBC who had well-defined taxane resistance, thus providing a potential therapeutic option in the clinical settings.

• Authors: Kenichi Inoue, Tsuyoshi Saito, Katsuhiko Okubo, Kei Kimizuka, Hirofumi Yamada, Takashi Sakurai, Kazuo Ishizuna, Satoshi Hata, Toshihiro Kai, Masafumi Kurosumi
• Journal: Breast cancer research and treatment (Breast Cancer Res Treat) Vol. 157 Issue 2 Pg. 295-305 (06 2016) ISSN: 1573-7217 [Electronic] Netherlands
• PMID: 27125669 (Publication Type: Clinical Trial, Phase II, Journal Article, Multicenter Study, Research Support, Non-U.S. Gov't)

Chemical References

• Antineoplastic Agents
• Furans
• Ketones
• eribulin

Topics

• Adult
• Aged
• Antineoplastic Agents (administration & dosage, adverse effects)
• Breast Neoplasms (drug therapy)
• Disease-Free Survival
• Drug Administration Schedule
• Female
• Furans (administration & dosage, adverse effects)
• Humans
• Infusions, Intravenous
• Japan
• Ketones (administration & dosage, adverse effects)
• Middle Aged
• Neoplasm Metastasis
• Prospective Studies
• Survival Analysis
• Treatment Outcome