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[89Zr]DFO-starPEG

Development stage
Phase 1
Lead developer
ProLynx
Modality
Antibody-Radionuclide Conjugates → Antibody Conjugates → Antibody-Based Therapeutics, Biodegradable Polymers → Polymer-based Nanoparticles → Nanoparticles → Drug Delivery Systems
Administration
Intravenous
01

Overview

**[89Zr]DFO-starPEG** is a novel diagnostic radiopharmaceutical developed for imaging purposes using positron emission tomography (PET). It consists of the radionuclide **zirconium-89 ([89Zr])** complexed by **desferrioxamine (DFO)**, which is conjugated to a multi-armed polyethylene glycol (starPEG) molecule. The tracer is designed to visualize **enhanced permeability and retention (EPR)-mediated uptake** in solid tumors. Its primary indication is to act as an imaging surrogate, specifically for mapping EPR effects in neoplasms before administration of EPR-based nanomedicines. Its mechanism is based on the passive accumulation in tumors via the EPR effect, allowing for whole-body PET imaging and dosimetric assessment in patients with malignant solid neoplasms and soft tissue lesions[1][5][7][8]. The agent’s biodistribution, safety, and pharmacokinetics are being characterized in first-in-human phase 1 clinical studies.

Other names
[89Zr]DFO-starPEGPET [89Zr]DFO-starPEG89-zr-dfo-star polyethylene glycol

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