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Eribulin mesylate 1.4 mg/m2 will be administered as an intravenous (IV) infusion (over 2 to 5 minutes) on Days 1 and 8 of each 3-week cycle.

Eribulin mesylate

Sam Misir

The purpose of this study is to assess the efficacy and safety of single-agent eribulin mesylate for first-line treatment of subjects with locally recurrent or metastatic breast cancer.

This is a multicenter, single-arm, Phase 2 trial to assess the efficacy and safety of single-agent eribulin mesylate for first-line treatment of subjects with locally recurrent or metastatic human epidermal growth factor receptor (HER2)-negative breast cancer. A total of 52 adult female subjects will be enrolled and treated with eribulin mesylate (1.4 mg/m2 as an intravenous \[i.v.\] infusion over 2 to 5 minutes on Days 1 and 8 of each 3-week cycle).

A Study of Single-Agent Eribulin Mesylate as First-Line Therapy for Locally Recurrent or Metastatic Human Epidermal Growth Factor Receptor Two (HER2) Negative Breast Cancer

A Phase 2, Multicenter, Single-Arm Study of Single-Agent Eribulin Mesylate as First-Line Therapy for Locally Recurrent or Metastatic Human Epidermal Growth Factor Receptor Two (HER2) Negative Breast Cancer

Treatment-emergent adverse events (TEAEs) were defined as AEs that emerged during treatment, having been absent at pretreatment, and occurring within 30 days of the last dose of study treatment, or if they were present prior to the first dose administration and increased in severity during the study. For each AE a participant with two or more TEAEs in that category were counted only once. TEAEs were considered related if the relationship of the event to study drug was possibly or probably related. Serious adverse events (SAEs) were defined as any untoward medical experience that resulted in death, was life-threatening, required hospitalization or prolongation of hospitalization, persistent or significant disability/incapacity, or was a congenital anomaly/birth defect. Safety information will be summarized with adverse events. AEs were graded on a five-point scale according to Common Terminology Criteria for Adverse Events (CTCAE) version 4.0.

The ORR was defined as the percentage of participants with best overall response (BOR) of confirmed complete response (CR) or partial response (PR), based on Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. Targeted lesions were assessed by computed tomography (CT) and magnetic resonance imaging (MRI) which were then assessed by the investigator based on RECIST. CR was defined as the disappearance of all target lesions. PR was defined as at least 30% decrease in the sum of diameters of target lesions, taking as reference baseline sum diameters. Possible CR and PR had to be confirmed no fewer than 4 weeks after the initial response assessment. A brain and bone scan was performed by CT/MRI within 1 week after confirmation of a response to ensure no new metastases. To be assigned a status of CR or PR, changes in tumor measurements had to be confirmed by repeat evaluations, to be performed not fewer than 4 weeks after the response criteria were first met. ORR = CR + PR

Time to first response was defined for participants whose BOR was a CR or PR. Analysis was based on the Kaplan-Meier estimated number of months to CR or PR. This statistical analysis method measures the effect of study drug on CR or PR.

Duration of response was measured for participants who were responders only, had attained a BOR that was CR or PR. The duration of response was measured from time that response criteria for CR or PR (whichever was recorded first) were first met until the date that progressive disease (PD) or death from any cause was first objectively documented. Participants who did not have PD were censored on the day of their last tumor assessment. Duration of response was summarized for the responders using Kaplan-Meier estimation method. This statistical analysis method measures the effect of study drug on the length of response time.

PFS was defined as the time from the date of the first dose of study drug until the date of first documentation of PD or date of death from any cause, whichever occurred first. Participants who died without reported PD were considered to have progressed on the day of their death. Participants who were lost to follow-up or alive and without reported PD at the end of study were censored on the date of their last tumor assessment. Participants without evidence of PD upon discontinuation of study drug during the Extension Phase returned to the clinic for disease evaluation and PFS calculation every 12 weeks until PD was documented. PFS was analyzed using Kaplan-Meier product-limit estimates. This statistical analysis method measures the effect of study drug on PFS.

Eisai Inc.

Safety Analysis Set population included all participants who received at least one dose of study drug and had at least one postbaseline safety assessment. AEs were graded on a five-point scale according to Common Terminology Criteria for Adverse Events (CTCAE) version 4.0. AEs rated as Grade 4 or 5 were considered serious.

Eribulin mesylate at 1.4 mg/m\^2 was administered as an intravenous (IV) infusion over 2 to 5 minutes on Days 1 and 8 of each 3-week cycle.

Eribulin Mesylate

Age, Continuous

Sex: Female, Male

Full analysis set included all participants who received at least one dose of study drug.

Eisai Medical Services

Full analysis set included all participants who received at least one dose of eribulin mesylate.

Objective Response Rate (ORR)

Full analysis set included all participants who received at least one dose of eribulin mesylate and were determined to be responders (CR or PR) to study treatment.

Time to First Response (CR or PR)

Duration of Response

Progression-Free Survival (PFS)

TEAEs

Treatment-related TEAEs

Serious TEAEs

Treatment-related Serious TEAEs

TEAEs leading to withdrawl of study drug

TEAEs leading to dose reduction

Safety Analysis Set population included all participants who received at least one dose of study drug and had at least one postbaseline safety assessment.

Spots Global Cancer Trial Database for A Study of Single-Agent Eribulin Mesylate as First-Line Therapy for Locally Recurrent or Metastatic Human Epidermal Growth Factor Receptor Two (HER2) Negative Breast Cancer

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