Study of Ubamatamab Alone or With Cemiplimab for Recurrent Ovarian or MUC16+ Cancers

This study is looking at ubamatamab, alone or with cemiplimab, for adults with recurrent ovarian, fallopian tube, primary peritoneal, or endometrial cancer. Researchers want to learn about the safety of these drugs and find the right dose. They will also see how the drugs move through your body (pharmacokinetics) and if they can treat these cancers. The study will also explore if sarilumab or tocilizumab can help prevent or reduce a side effect called Cytokine Release Syndrome (CRS). To join, you must be a woman aged 18 or older with one of these cancers, and for ovarian cancer cohorts, have a specific CA-125 level. The study aims to enroll up to 890 participants.

Study design
This interventional study plans to enroll up to 890 participants. It is looking at the safety and effectiveness of ubamatamab alone or in combination with cemiplimab, sarilumab, or tocilizumab.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Safety and side effects will be monitored for ubamatamab monotherapy for up to 2 years. Other specific follow-up durations are not detailed.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT03564340

Study of REGN4018 (Ubamatamab) Administered Alone or in Combination With Cemiplimab in Adult Patients With Recurrent Ovarian Cancer or Other Recurrent Mucin-16 Expressing (MUC16+) Cancers

Recruiting
PHASE1Ages 18+InterventionalTreatment
Regeneron Pharmaceuticals
~890 participants
Updated 2026-07-22 on ClinicalTrials.gov
What's tested:UbamatamabCemiplimabSarilumabTocilizumab

At a glance

Recruiting sites
47 of 52 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Number of participants with Dose-limiting toxicity (DLTs) for ubamatamab monotherapy
Measured over From Cycle 1, Day 1 up to 35 days
+13 more outcomes measured
Recurrent Ovarian Cancer
Recurrent Fallopian Tube Cancer
Recurrent Primary Peritoneal Cancer
Recurrent Endometrial Cancer
Endometrial Cancer
Low-grade Serous Ovarian Cancer
52 sites across 31 states
Spain7
South Korea5
United Kingdom4
New York3
Israel3
Italy3
Massachusetts2
Surrey2
  • Clinical Trial Management · STUDY_DIRECTOR · Regeneron Pharmaceuticals

Opens a ready-to-send draft in your own email app — review before sending.

  • Number of participants with Dose-limiting toxicity (DLTs) for ubamatamab monotherapyFrom Cycle 1, Day 1 up to 35 days

    Dose Escalation Phase

  • Number of participants with DLTs for ubamatamab with cemiplimabFrom Cycle 2, Day 1 up to 21 days

    Dose Escalation Phase

  • Number of participants with Treatment-emergent adverse event (TEAE)s (including immune-related adverse events (imAEs)) for ubamatamab monotherapyUp to 2 years

    Dose Escalation Phase

  • Number of participants with TEAEs (including imAEs) for ubamatamab with cemiplimabUp to 2 years

    Dose Escalation Phase

  • Number of participants with serious adverse events (SAEs) for ubamatamab monotherapyUp to 2 years

    Dose Escalation Phase

  • Number of participants with SAEs for ubamatamab with cemiplimabUp to 2 years

    Dose Escalation Phase

  • Number of deaths for ubamatamab monotherapyUp to 2 years

    Dose Escalation Phase

  • Number of deaths for ubamatamab with cemiplimabUp to 2 years

    Dose Escalation Phase

  • Number of participants with laboratory abnormalities (grade 3 or higher per Common Terminology Criteria for Adverse Events [CTCAE]) for ubamatamab monotherapyUp to 2 years

    Dose Escalation Phase

  • Number of participants with laboratory abnormalities (grade 3 or higher per CTCAE) for ubamatamab with cemiplimabUp to 2 years

    Dose Escalation Phase

  • Concentration of ubamatamab in serum over time for ubamatamab monotherapyUp to 2 years

    Dose Escalation Phase

  • Concentration of ubamatamab in serum over time for ubamatamab with cemiplimabUp to 2 years

    Dose Escalation Phase

  • Objective response rate (ORR) defined by Response Evaluation Criteria in Solid Tumors (RECIST 1.1) for ubamatamab monotherapyUp to 2 years

    Dose Expansion Phase

  • ORR defined by RECIST 1.1 for ubamatamab with cemiplimabUp to 2 years

    Dose Expansion Phase