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A Trial to Find Out if REGN5678 (Nezastomig) is Safe and How Well it Works Alone or in Combination With Cemiplimab for Adult Participants With Metastatic Castration-Resistant Prostate Cancer and Other Tumors
Sponsor: Regeneron Pharmaceuticals
Summary
The main purpose of this study is to determine the safety, tolerability (how the body reacts to the drug\[s\]) and effectiveness (ability to treat the cancer) of REGN5678 (Nezastomig) alone, or in combination with cemiplimab. The study has 2 parts. The goal of Part 1 (dose escalation) is to determine a safe dose(s) of REGN5678 when it is given alone or in combination with cemiplimab. The goal of Part 2 (dose expansion) is to use the REGN5678 drug dose(s) found in Part 1 to see how well REGN5678 alone or in combination with cemiplimab works to shrink tumors. This study is looking at several other research questions, including: 1. Side effects that may be experienced by taking REGN5678 alone or in combination with cemiplimab 2. How REGN5678 alone or in combination with cemiplimab works in the body 3. How much REGN5678 and/or cemiplimab are present in the blood 4. To see if REGN5678 alone or in combination with cemiplimab works to reduce the size of the tumor by helping the immune system destroy the tumor
Official title: A Phase 1/2 Study of REGN5678 (Anti-PSMAxCD28) With or Without Cemiplimab (Anti-PD-1) in Patients With Metastatic Castration-Resistant Prostate Cancer and Other Tumors Associated With PSMA Expression
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
345
Start Date
2019-08-12
Completion Date
2027-11-15
Last Updated
2025-11-06
Healthy Volunteers
No
Conditions
Interventions
REGN5678
Administered as per the protocol
Cemiplimab
Administered as per the protocol
Locations (21)
Banner MD Anderson Cancer Center
Gilbert, Arizona, United States
Mayo Clinic
Phoenix, Arizona, United States
University of Arizona
Tucson, Arizona, United States
John Wayne Cancer Institute (JWCI)
Santa Monica, California, United States
Sarah Cannon Research Institute (SCRI)
Denver, Colorado, United States
Yale University Hospital
New Haven, Connecticut, United States
Mayo Clinic Jacksonville
Jacksonville, Florida, United States
Moffitt Cancer Center - McKinley Drive
Tampa, Florida, United States
Massachusetts General Hospital
Boston, Massachusetts, United States
Mayo Clinic
Rochester, Minnesota, United States
NYU Langone Health Perlmutter Cancer Center
New York, New York, United States
Icahn School of Medicine at Mount Sinai
New York, New York, United States
Columbia University - The Trustees of Columbia University in the City of New York
New York, New York, United States
Montefiore Medical Center
New York, New York, United States
University of Rochester Medical Center (URMC) - Wilmot Cancer Institute (WCI) (James P. Wilmot Cancer Center) - Rochester
Rochester, New York, United States
Providence Portland Medical Center
Portland, Oregon, United States
Oregon Health & Science University (3485 S. Bond)
Portland, Oregon, United States
Thomas Jefferson University Hospital
Philadelphia, Pennsylvania, United States
Lifespan Cancer Institute
Providence, Rhode Island, United States
MD Anderson Cancer Center
Houston, Texas, United States
Emily Couric Clinical Cancer Center
Charlottesville, Virginia, United States