Whetter JN, Vaughn BA, Koller AJ, Boros E. An Unusual Pair: Facile Formation and In Vivo Validation of Robust Sc-
18 F Ternary Complexes for Molecular Imaging.
Angew Chem Int Ed Engl 2021;
61:e202114203. [PMID:
34889014 DOI:
10.1002/anie.202114203]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Indexed: 12/11/2022]
Abstract
Fluorine-18 remains the most widely clinically utilized radionuclide globally for positron emission tomography (PET). The emergence of therapeutic isotopes for the management of disease has produced a pronounced interest in matched, theranostic isotope pairs that can be employed in tandem for the diagnosis and stratification of patients for subsequent radiotherapy. 18 F, however, does not have a suitable therapeutic isotopologue. Here, we demonstrate that the formation of [18 F][Sc-F] ternary complexes is feasible under mild, aqueous conditions, producing chemically robust radiopharmaceuticals in high radiochemical yield and specific activity. A corresponding in vivo study with a cancer-targeting [18 F][Sc-F] tracer indicates excellent in vivo stability and produces exquisite PET image quality, rendering the 18 F/47 Sc isotope pair an unusual, yet chemically matched theranostic pair with excellent potential for clinical translation.
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