Clinical trial Recruiting at 56 sites Phase 2 Interventional Ages 18 and up Women only

Ubamatamab alone and with other cancer drugs for platinum-resistant ovarian, fallopian tube, or primary peritoneal cancer

Official title: Multi-Arm Phase 2 Platform Study of Ubamatamab (REGN4018; MUC16×CD3 Bispecific Antibody) With or Without Additional Agents in Platinum-Resistant Ovarian Cancer

Run by Regeneron Pharmaceuticals · NCT06787612 · Data updated 2026-11-12

This trial will test whether ubamatamab by itself or combined with bevacizumab, cemiplimab, fianlimab, or pegylated liposomal doxorubicin helps adults with platinum-resistant ovarian, fallopian tube, or primary peritoneal cancer.

More Ovarian Cancer trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexWomen only
Enrollment397 (estimated)
SponsorRegeneron Pharmaceuticals
Industry-sponsored
Drugs / interventionsdoxorubicin, ubamatamab, bevacizumab, cemiplimab, fianlimab, chemotherapy
Locations56 sites (Birmingham, Alabama and 55 other locations)
StatusRecruiting
StartedMay 28, 2025
Main results expectedJune 30, 2028
Study endsJune 30, 2028
Registry record updatedNovember 6, 2026
Trial IDNCT06787612 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults with histologically or cytologically confirmed advanced serous or endometrioid ovarian, primary peritoneal, or fallopian tube cancer that is platinum-resistant, with at least one measurable lesion, ECOG 0–1, and adequate organ and marrow function are ideal candidates.

Probably not a fit

Patients with excluded histologies (clear cell, mucinous, carcinosarcoma), recent major surgery or trauma, known severe allergies to antibody therapies or doxorubicin components, poor performance status, or without measurable disease are unlikely to qualify or benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This phase 2, multi-center trial gives adults with platinum-resistant ovarian, fallopian tube, or primary peritoneal cancer ubamatamab either alone or paired with bevacizumab, cemiplimab, fianlimab, or pegylated liposomal doxorubicin (PLD). The study will monitor safety, tolerability, anti-tumor activity, blood levels of the drugs, and whether the body develops antibodies against the treatments. Eligible participants must have measurable disease by RECIST 1.1, ECOG performance status 0–1, and adequate organ and bone marrow function. Research visits occur at participating U.S. centers and include regular imaging and laboratory testing to track response and side effects.

Why it matters

Potential benefit: If successful, the regimen could provide a new treatment option that improves tumor control for people with platinum-resistant disease.

How similar studies have gone: Other antibody combinations and immune checkpoint approaches have shown activity in some platinum-resistant ovarian cancer trials, but ubamatamab and its specific combinations are relatively new and not yet proven effective.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

1. Participants with histologically or cytologically confirmed diagnosis of advanced serous or endometrioid ovarian (regardless of the grade), primary peritoneal, or fallopian tube cancer (clear cell, mucinous, and carcinosarcoma are excluded)
2. Must have progression on prior therapy documented radiographically and must have at least 1 measurable lesion (not previously irradiated) that can be accurately measured by RECIST 1.1
3. Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
4. Adequate organ and bone marrow function, as described in the protocol
5. Platinum-Resistant Ovarian Cancer, as described in the protocol

Key Exclusion Criteria:

1. Major surgical procedure or significant traumatic injury within 4 weeks prior to first dose of study intervention(s)
2. Documented allergic or acute hypersensitivity reaction attributed to antibody treatments or doxorubicin hydrochloride or components of study intervention(s)
3. Another malignancy that is progressing or requires active treatment, as described in the protocol
4. Untreated or active Central Nervous System (CNS) metastases, or carcinomatous meningitis, as described in the protocol
5. Uncontrolled infections including but not limited to human immunodeficiency virus, hepatitis B or hepatitis C infection, or diagnosis of immunodeficiency
6. Moderate to large or ascites, as described in the protocol
7. Bowel obstruction within last 3 months or current need for parenteral nutrition

NOTE: Other protocol-defined inclusion/exclusion criteria apply

Where it's running

  • The University of Alabama at Birmingham
    Birmingham, Alabama, United States
    Recruiting
  • UC San Diego Health
    La Jolla, California, United States
    Recruiting
  • Cedars Sinai Medical Center
    Los Angeles, California, United States
    Recruiting
  • Mayo Clinic Jacksonville
    Jacksonville, Florida, United States
    Recruiting
  • University of Miami Sylvester Comprehensive Cancer Center
    Miami, Florida, United States
    Recruiting
  • Advent Health Cancer Institute
    Orlando, Florida, United States
    Recruiting
Show 44 more locations
  • Tampa General Hospital Cancer Institute
    Tampa, Florida, United States
    Recruiting
  • University of Chicago
    Chicago, Illinois, United States
    Recruiting
  • The University of Kansas Cancer Center
    Westwood, Kansas, United States
    Recruiting
  • Norton Cancer Institute, St. Matthews Clinic
    Louisville, Kentucky, United States
    Recruiting
  • Massachusetts General Hospital
    Boston, Massachusetts, United States
    Recruiting
  • Karmanos Cancer Institute
    Detroit, Michigan, United States
    Recruiting
  • The Ohio State University Comprehensive Cancer Center
    Hilliard, Ohio, United States
    Recruiting
  • Providence Cancer Institute
    Portland, Oregon, United States
    Recruiting
  • University of Pittsburgh Medical Center, Magee-Womens Hospital
    Pittsburgh, Pennsylvania, United States
    Recruiting
  • West Penn Hospital of Allegheny Health Network
    Pittsburgh, Pennsylvania, United States
    Recruiting
  • Avera Cancer Institute Sioux Falls
    Sioux Falls, South Dakota, United States
    Recruiting
  • UT Southwestern Medical Center
    Dallas, Texas, United States
    Recruiting
  • Swedish Cancer Institute
    Seattle, Washington, United States
    Recruiting
  • University of Wisconsin
    Madison, Wisconsin, United States
    Recruiting
  • Medical College of Wisconsin
    Milwaukee, Wisconsin, United States
    Recruiting
  • CancerCare Manitoba
    Winnipeg, Manitoba, Canada
    Recruiting
  • Princess Margaret Cancer Centre
    Toronto, Ontario, Canada
    Recruiting
  • Centre de Santé et de Services Sociaux de la Montérégie-Centre
    Greenfield Park, Quebec, Canada
    Recruiting
  • Jewish General Hospital
    Montreal, Quebec, Canada
    Recruiting
  • Research Institute - McGill University Health Centre
    Montreal, Quebec, Canada
    Recruiting
  • Centre Hospitalier Universitaire (CHU) de Quebec - Universite Laval
    Québec, Canada
    Recruiting
  • National Cancer Center
    Gyeonggi-do, Gyeonggi-do, South Korea
    Recruiting
  • Seoul National University Bundang Hospital
    Seongnam-si, Gyeonggi-do, South Korea
    Recruiting
  • Gachon University Gil Medical Center
    Incheon, Seoul, South Korea
    Recruiting
  • Keimyung University Dongsan Hospital
    Daegu, South Korea
    Recruiting
  • Severance Hospital Yonsei University Health System
    Seoul, South Korea
    Recruiting
  • Asan Medical Center, Univ. of Ulsan
    Seoul, South Korea
    Recruiting
  • Samsung Medical Center
    Seoul, South Korea
    Recruiting
  • Gangnam Severance Hospital
    Seoul, South Korea
    Recruiting
  • Seoul National University Hospital
    Seoul, South Korea
    Recruiting
  • Korea University Guro Hospital
    Seoul, South Korea
    Recruiting
  • Changhua Christian Hospital
    Changhua, Changhua City, Taiwan
    Recruiting
  • Chi Mei Medical Center
    Tainan, Taiwan
    Recruiting
  • Mackay Memorial Hospital
    Taipei, Taiwan
    Recruiting
  • National Taiwan University Hospital
    Taipei, Taiwan
    Recruiting
  • Taipei Veterans General Hospital
    Taipei, Taiwan
    Recruiting
  • Tri-Service General Hospital
    Taipei, Taiwan
    Recruiting
  • Taipei Municipal Wan Fang Hospital
    Taipei, Taiwan
    Recruiting
  • Medicalpark Seyhan Hospital
    Seyhan, Adana, Turkey (Türkiye)
    Recruiting
  • Hacettepe University
    Altındağ, Ankara, Turkey (Türkiye)
    Recruiting
  • Medipol University Hospital
    Istanbul, Bagcilar, Turkey (Türkiye)
    Recruiting
  • Ege Universitesi Tip Fakultesi Hastanesi
    Bornova, İzmir, Turkey (Türkiye)
    Recruiting
  • Gaziantep Medicalpoint Hospital
    Gaziantep, Sehitkamil, Turkey (Türkiye)
    Recruiting
  • Baskent University
    Adana, Turkey (Türkiye)
    Recruiting

+6 more sites. See ClinicalTrials.gov for the full list.

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.