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.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | Women only |
| Enrollment | 397 (estimated) |
| Sponsor | Regeneron Pharmaceuticals Industry-sponsored |
| Drugs / interventions | doxorubicin, ubamatamab, bevacizumab, cemiplimab, fianlimab, chemotherapy |
| Locations | 56 sites (Birmingham, Alabama and 55 other locations) |
| Status | Recruiting |
| Started | May 28, 2025 |
| Main results expected | June 30, 2028 |
| Study ends | June 30, 2028 |
| Registry record updated | November 6, 2026 |
| Trial ID | NCT06787612 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
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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
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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
- Study coordinator: Clinical Trials Administrator
- Email: clinicaltrials@regeneron.com
- Phone: 844-734-6643
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.