Therapeutic isotope supply chain (Mo-99, Lu-177, Ac-225)
Where the radioactive atoms for imaging and therapy actually come from: ageing reactors, new accelerators, and a scramble for actinium.
Overview
Mo-99/Tc-99m for SPECT still depends on a few research reactors (BR2, HFR Petten, OPAL, SAFARI) with accelerator alternatives from NorthStar and SHINE. Lu-177 (non-carrier-added) is supplied by ITM, SHINE, Eckert & Ziegler, Curium and NorthStar; Ac-225 supply is the binding constraint for alpha therapy, with US DOE, TerraPower Isotopes, Orano Med (Pb-212), NorthStar, Niowave, and ITM expanding. Supply agreements are now a competitive asset for radiopharma companies.
How it works
Reactor neutron capture (Lu-176→Lu-177), Th-229 decay chains and accelerator spallation (Ac-225), and electron-accelerator photonuclear routes (Mo-99) produce isotopes that are purified, calibrated, and shipped against decay.
- Multiple new non-reactor routes since 2020
- Ac-225 shortage until late 2020s
- Reactor outages cause global shortages
- Regulatory licensing of new production sites is slow
Dependencies
Open the dependency map →Nothing recorded yet: a foundation, or a gap to fill.
Dependencies are what this technology cannot be delivered without: manufacturing steps, instruments, software, upstream methods. See its full chain on the map.
This paper is a map of the radioactive-cancer-drug field at a pivotal moment, explaining to non-specialists and drug developers alike why these treatments work differently from chemotherapy and what needed to be fixed - supply, dosing science, regulation - before more of them could reach patients.
This article is a call to action from senior nuclear medicine physicians: the treatments were becoming ready, but hospitals, regulators and isotope suppliers were not yet organised to deliver them at scale - a warning that proved accurate when demand for lutetium-177 PSMA therapy outstripped supply after 2022.
Latest papers
topQuery for this technology: (TITLE:"Therapeutic isotope supply chain" OR ABSTRACT:"Therapeutic isotope supply chain" OR TITLE:"Mo-99, Lu-177, Ac-225" OR ABSTRACT:"Mo-99, Lu-177, Ac-225") AND (radiopharmaceutical OR radioligand OR radionuclide OR theranostic OR "nuclear medicine" OR "molecular imaging" OR radiotracer OR scintigraphy OR cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about Therapeutic isotope supply chain (Mo-99, Lu-177, Ac-225), not a curated reading list.
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