Fundamentals of Rhenium-188 Radiopharmaceutical Chemistry.

Molecules

ICMATE-CNR, Corso Stati Uniti 4, 35127 Padua, Italy.

Published: February 2023

The β emitter, rhenium-188 (Re), has long been recognized as an attractive candidate for targeted cancer radionuclide therapy (TRNT). This transition metal shares chemical similarities with its congener element technetium, whose nuclear isomer technetium-99m (Tc) is the current workhorse of diagnostic nuclear medicine. The differences between these two elements have a significant impact on the radiolabelling methods and should always receive critical attention. This review aims to highlight what needs to be considered to design a successful radiopharmaceutical incorporating Re. Some of the most effective strategies for preparing therapeutic radiopharmaceuticals with Re are illustrated and rationalized using the concept of the inorganic functional group (core) and a simple ligand field theoretical model combined with a qualitative definition of frontiers orbitals. Of special interest are the Re(V) oxo and Re(V) nitrido functional groups. Suitable ligands for binding to these cores are discussed, successful clinical applications are summarized, and a prediction of viable future applications is presented. Rhenium-188 decays through the emission of a high energy beta particle (2.12 MeV max energy) and a half-life of 16.9 h. An ideal biological target would therefore be a high-capacity target site (transporters, potential gradients, tumour microenvironment) with less emphasis on saturable targets such as overexpressed receptors on smaller metastases.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921938PMC
http://dx.doi.org/10.3390/molecules28031487DOI Listing

Publication Analysis

Top Keywords

fundamentals rhenium-188
4
rhenium-188 radiopharmaceutical
4
radiopharmaceutical chemistry
4
chemistry emitter
4
emitter rhenium-188
4
rhenium-188 long
4
long recognized
4
recognized attractive
4
attractive candidate
4
candidate targeted
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!