The primary objective of this study was to assess the effect of cytochrome P450 3A4 enzyme (CYP3A4) induction by rifampicin on the pharmacokinetics (PK) of eribulin mesylate following intravenous (IV) administration in participants with advanced solid tumors. The secondary objectives of this study were to assess the safety of eribulin mesylate when co-administered with rifampicin and assess the safety and activity of eribulin mesylate as a single agent.
The study consisted of 3 phases: Pre-Treatment, Treatment, and Extension. Pre-Treatment Phase had 2 periods: Screening and Baseline. Treatment Phase consisted of intensive PK assessment with eribulin mesylate given IV alone on Day 1 followed by eribulin mesylate given IV on Day 15 with rifampicin given orally from Days 9 to 20. Extension Phase allowed eribulin mesylate treatment to continue for participants without progressive disease or unacceptable toxicity.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
14
Treatment phase: During Cycle 1, eribulin mesylate was administered as a 2 to 5 minute (min) intravenous (IV) infusion at 1.4 mg/m2 on Day 1 and Day 15 of 21-day cycle. During subsequent cycles, eribulin mesylate administration as a 2 to 5 min IV infusion at 1.4 mg/m2 on Day 1 and Day 8 of a 21-day cycle. Extension phase: Eribulin mesylate was administered continuously as a 2 to 5 min IV infusion at 1.4 mg/m2 on Day 1 and Day 8 of 21-day cycles, as long as the Investigator considered eribulin mesylate therapy to be clinically appropriate.
Treatment phase: Rifampicin 600 mg was administered orally once a day, from Day 9 to Day 20 of 28-day cycle of Cycle 1.
Netherlands Cancer Institute
Amsterdam, Netherlands
University Medical Center Utrecht
Utrecht, Netherlands
Best overall tumor response
Time frame: From signing of Informed consent until disease progression, undue toxicity, withdrawal by participant, at the discretion of the investigator or up to approximately 8 Months
Area under the concentration-time curve from zero (pre-dose) extrapolated to infinite time (AUC 0-infinity) for eribulin mesylate +/- rifampicin
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 minute (min), and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
Maximum observed plasma concentration (Cmax) for eribulin mesylate +/- rifampicin
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 min and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
Area under the concentration-time curve from zero (pre-dose) to time of last quantifiable concentration (AUC 0-t) for eribulin mesylate
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 min and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
Time of maximum observed plasma concentration (Tmax) for eribulin mesylate
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 min and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
Half-life (t1/2) for eribulin mesylate
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 min and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
Clearance (CL) for eribulin mesylate
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 min and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
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Volume of distribution at steady state (Vss) for eribulin mesylate
Time frame: Day 1 and Day 15 of Cycle 1 (pre-dose, end of infusion, 15 min and 30 min, 1, 2, 4, 6, 10, 24, 48, 72, 96, 120 and 144 hours after each eribulin administration)
Number of participants with adverse events (AEs) and serious adverse events (SAEs) as a measure of safety
Time frame: From date of administration of first dose up to 30 days after the last dose of study treatment, up to approximately 8 months.