Treatment of Milademetan Versus Trabectedin in Patient With Dedifferentiated Liposarcoma

Official Title

A Randomized Multicentre Phase 3 Study of Milademetan Versus Trabectedin in Patients With Dedifferentiated Liposarcoma


Randomized, multicentre, open-label, Phase 3 registration study designed to evaluate the safety and efficacy of milademetan compared to trabectedin in patients with unresectable (i.e., where resection is deemed to cause unacceptable morbidity or mortality) or metastatic DD liposarcoma that progressed on 1 or more prior systemic therapies, including at least 1 anthracycline-based therapy.

Trial Description

Primary Outcome:

  • Compare progression-free survival (PFS) as determined by Blinded Independent Central Review (BICR) between the milademetan treatment arm and trabectedin control arm
Secondary Outcome:
  • Overall survival (OS)
  • Disease control rate (DCR)
  • Objective response rate (ORR)
  • Duration of response (DOR)
  • PFS by Investigator assessments
  • Number of participants with treatment-emergent adverse events until approximately 30 days after the last study drug
  • Evaluate the patient-reported outcomes by using the European Organisation for Research and Treatment of Cancer Quality-of-Life Questionnaire, Core 30 (QLQ-C30)
Approximately 160 patients will be randomly assigned in a 1:1 ratio to receive milademetan or trabectedin. Randomization will be stratified by the ECOG performance status (0 or 1) and number of prior treatments (≤ 2 or > 2) for the patient's liposarcoma.

Patients will receive study drug (i.e., milademetan or trabectedin) until reaching unequivocal disease progression (RECIST v.1.1) as determined by the Investigator, experiencing unmanageable toxicity, or until other treatment discontinuation criteria are met. Patients may be treated beyond tumour progression if they are experiencing clinical benefit based on the assessment of the Investigator in discussion with the Medical Monitor. All patients will be followed for documentation of disease progression and survival information (i.e., date and cause of death) and subsequent treatment information (i.e., date/duration of treatment, response, and subsequent disease progression). Long-term follow-up will continue every 12 weeks (± 7 days) until the endpoint of death, the patient is lost to follow-up, or for 24 months following the final dose of study drug, whichever comes first.

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