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OncoMatch/Clinical Trials/NCT05259709

A Study of ImmunoPet Imaging Using 89Zr-DFO-REGN5054 in Adult Participants With Solid Cancers Treated With Cemiplimab

Is NCT05259709 recruiting? Yes, currently enrolling (May 2026). This Phase 1 trial studies multiple treatments including 89Zr˗DFO˗REGN5054 and cemiplimab for advanced solid tumor.

Phase 1RecruitingRegeneron PharmaceuticalsNCT05259709Data as of May 2026

Treatment: 89Zr˗DFO˗REGN5054 · cemiplimabThis study is researching an experimental drug called 89Zr-DFO-REGN5054 and cemiplimab. The study is focused on patients with a type of cancer that can be potentially imaged using 89Zr-DFO-REGN5054 and show special tumor features that may be important to the way the immune system fights cancer. The aim of the study is to study the safety and tolerability (how the body reacts to the drug) of the imaging agent 89Zr-DFO REGN5054. The study is looking at several other research questions, including: * What side effects may happen from taking the study drugs * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drugs (which could make the study drugs less effective or could lead to side effects)

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Extracted eligibility criteria

Cancer type

Tumor Agnostic

Performance status

ECOG 0–1(Restricted strenuous activity)

Prior therapy

Cannot have received: anti-PD-1/PD-L1 therapy

Prior treatment with a blocker of the PD-1/Programmed death ligand 1 (PD-L1) pathway

Cannot have received: CAR-T cell therapy

Currently receiving or has received chimeric antigen receptor (CAR-T) cell therapy

Lab requirements

Blood counts

Kidney function

Liver function

Structured fields extracted by AI. May contain errors — verify against the official protocol.

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