Skip to Main content Skip to Navigation
Journal articles

Targeted radionuclide therapy with astatine-211: Oxidative dehalogenation of astatobenzoate conjugates

Abstract : 211 At is a most promising radionuclide for targeted alpha therapy. However, its limited availability and poorly known basic chemistry hamper its use. Based on the analogy with iodine, labelling is performed via astatobenzoate conjugates, but in vivo deastatination occurs, particularly when the conjugates are internalized in cells. Actually, the chemical or biological mechanism responsible for deastatination is unknown. In this work, we show that the C−At "organometalloid" bond can be cleaved by oxidative dehalogenation induced by oxidants such as permanganates, peroxides or hydroxyl radicals. Quantum mechanical calculations demonstrate that astatobenzoates are more sensitive to oxidation than iodobenzoates, and the oxidative deastatination rate is estimated to be about 6 × 10 6 faster at 37 °C than the oxidative deiodination one. Therefore, we attribute the "internal" deastatination mechanism to oxidative dehalogenation in biological compartments, in particular lysosomes.
Document type :
Journal articles
Complete list of metadata

http://hal.univ-nantes.fr/hal-03346519
Contributor : Nicolas Galland Connect in order to contact the contributor
Submitted on : Thursday, September 16, 2021 - 2:05:52 PM
Last modification on : Monday, October 11, 2021 - 9:20:04 AM

Files

GallandNicolas_2017.pdf
Publisher files allowed on an open archive

Identifiers

Citation

David Teze, Dumitru-Claudiu Sergentu, Valentina Kalichuk, Jacques Barbet, David Deniaud, et al.. Targeted radionuclide therapy with astatine-211: Oxidative dehalogenation of astatobenzoate conjugates. Scientific Reports, Nature Publishing Group, 2017, 7 (1), ⟨10.1038/s41598-017-02614-2⟩. ⟨hal-03346519⟩

Share

Metrics

Record views

65

Files downloads

132