Automated cassette-based production of high specific activity [203/212Pb]peptide-based theranostic radiopharmaceuticals for image-guided radionuclide therapy for cancer
- Univ. of Iowa, Iowa City, IA (United States). Interdisciplinary Graduate Program in Human Toxicology
- Univ. of Missouri, Columbia, MO (United States). Dept. of Biochemistry
- Univ. of Iowa, Iowa City, IA (United States). Stead Family Dept. of Pediatrics
- Eckert & Ziegler Radiopharma GmbH, Berlin (Germany)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Eichrom Technologies, LLC, Lisle, IL (United States)
- Lantheus Medical Imaging North Billerica, MA (United States)
- Univ. of Iowa, Iowa City, IA (United States). Dept. of Radiology
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Viewpoint Molecular Targeting, LLC, Coralville, IA (United States); Univ. of Iowa, Iowa City, IA (United States). Carver College of Medicine, Dept. of Internal Medicine
- Univ. of Iowa, Iowa City, IA (United States). Interdisciplinary Graduate Program in Human Toxicology; Univ. of Iowa, Iowa City, IA (United States). Stead Family Dept. of Pediatrics; Univ. of Iowa, Iowa City, IA (United States). Dept. of Radiology; Viewpoint Molecular Targeting, LLC, Coralville, IA (United States); Univ. of Iowa, Iowa City, IA (United States). Carver College of Medicine, Dept. of Radiation Oncology; Univ. of Iowa, Iowa City, IA (United States). Dept. of Chemistry
A method for preparation of Pb-212 and Pb-203 labeled chelator-modified peptide-based radiopharmaceuticals for cancer imaging and radionuclide therapy has been developed and adapted for automated clinical production. Pre-concentration and isolation of radioactive Pb2+ from interfering metals in dilute hydrochloric acid was optimized using a commercially-available Pb-specific chromatography resin packed in disposable plastic columns. The pre-concentrated radioactive Pb2+ is eluted in NaOAc buffer directly to the reaction vessel containing chelator-modified peptides. Radiolabeling was found to proceed efficiently at 85 °C (45 min; pH 5.5). The specific activity of radiolabeled conjugates was optimized by separation of radiolabeled conjugates from unlabeled peptide via HPLC. Preservation of bioactivity was confirmed by in vivo biodistribution of Pb-203 and Pb-212 labeled peptides in melanoma-tumor-bearing mice. The approach has been found to be robustly adaptable to automation and a cassette-based fluid-handling system (Modular Lab Pharm Tracer) has been customized for clinical radiopharmaceutical production. Our findings demonstrate that the Pb-203/Pb-212 combination is a promising elementally-matched radionuclide pair for image-guided radionuclide therapy for melanoma, neuroendocrine tumors, and potentially other cancers.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1491308
- Journal Information:
- Applied Radiation and Isotopes, Vol. 127, Issue C; ISSN 0969-8043
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Development and dosimetry of 203Pb/212Pb-labelled PSMA ligands: bringing “the lead” into PSMA-targeted alpha therapy?
|
journal | January 2019 |
Similar Records
Targeted Therapy for Melanoma
TH-AB-206-01: Advances in Radionuclide Therapy - From Radioiodine to Nanoparticles