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Study identifier: NCT04590326 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A Study to Find Out How Safe REGN5668 is and How Well it Works In Adult Women When Given With Either Cemiplimab, or Cemiplimab + Fianlimab, or Ubamatamab

Condition: Ovarian Cancer · Fallopian Tube Cancer · Primary Peritoneal Cancer  ·  Sponsor: Regeneron Pharmaceuticals

PhasePhase 1/Phase 2
Planned participants612
Who can joinFemale, 18 Years to no upper limit
Healthy volunteersNo

About this study

This study is researching an investigational drug called REGN5668 : * alone or, * combined with cemiplimab (also known as REGN2810) or, * combined with both cemiplimab and fianlimab (also known as REGN3767), or * combined with ubamatamab (also known as REGN4018), with or without sarilumab. The main purposes of this study are to: * Learn about the safety and profile of any side effects from the study drugs and to determine the highest, safe dose that can be given to participants with ovarian cancer or cancer of the uterus * Look for signs that the study drugs can treat ovarian cancer or cancer of the uterus This study has 2 parts. The purpose of Part 1 (Escalation) is to find the highest, safe dose of the study drug(s). The purpose of Part 2 (Expansion) is to use the doses chosen in Part 1. Participants with cancer of the uterus will only participate in Part 2. The study is looking at several other research questions, including: * Side effects that may be experienced by participants taking REGN5668 alone and/or in combination with cemiplimab, cemiplimab and fianlimab, or ubamatamab * How REGN5668 works in the body either alone and/or in combination with cemiplimab, cemiplimab and fianlimab, or ubamatamab * How much of the study drugs (REGN5668, cemiplimab, fianlimab, ubamatamab) are in the blood * To see if REGN5668 in combination with cemiplimab, cemiplimab and fianlimab, or ubamatamab works to treat cancer

This description comes directly from the study's public registry record.

Talk to the study team

Clinical Trials Administrator  ·  844-734-6643  ·  clinicaltrials@regeneron.com

Always discuss trial participation with your own doctor first.

Locations (24)

City of Hope Comprehensive Cancer CenterDuarte, California, United StatesRecruiting
The City of Hope Orange County Lennar Foundation Cancer CenterIrvine, California, United StatesRecruiting
Chao Family Comprehensive Cancer CenterOrange, California, United StatesRecruiting
H. Lee Moffitt Cancer CenterTampa, Florida, United StatesCompleted
Robert H. Lurie Comprehensive Cancer Center of Northwestern UniversityChicago, Illinois, United StatesRecruiting
University of Chicago Medical CenterChicago, Illinois, United StatesRecruiting
Massachusetts General HospitalBoston, Massachusetts, United StatesRecruiting
Dana Farber Cancer Institute Brookline AvenueBoston, Massachusetts, United StatesRecruiting
Karmanos Cancer InstituteDetroit, Michigan, United StatesRecruiting
Memorial Sloan Kettering Cancer CenterNew York, New York, United StatesRecruiting
The Ohio State University Wexner Medical CenterColumbus, Ohio, United StatesRecruiting
Perelman School of Medicine at the University of PennsylvaniaPhiladelphia, Pennsylvania, United StatesRecruiting

+ 12 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT04590326