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

Recruiting now · Phase 1/Phase 2

Conditions studied: Ovarian Cancer, Fallopian Tube Cancer, Primary Peritoneal Cancer, Endometrial Cancer

In brief

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

Key facts

Study ID
NCT04590326
Run by
Regeneron Pharmaceuticals
People needed
612
Starts
2020-12-08
Expected to finish
2027-11-30
Last updated by the study team
2025-11-21

Who can join

Age: 18 and older. Sex: female. Healthy volunteers: not accepted.

Where it is running

Full record on ClinicalTrials.gov

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