Academic Journal
Sulfur [ 18 F]Fluoride Exchange Reaction Enables Rapid Access to 18 F-Labeled PET Tracers
| العنوان: | Sulfur [ 18 F]Fluoride Exchange Reaction Enables Rapid Access to 18 F-Labeled PET Tracers |
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| المؤلفون: | Austin Craig, Jürgen Kogler, Fabian Krutzek, Florian Brandt, Markus Laube, Martin Ullrich, Cornelius Kurt Donat, Klaus Kopka, Sven Stadlbauer |
| المصدر: | Medical Sciences Forum, Vol 14, Iss 1, p 127 (2022) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2022 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | fluorine-18, positron emission tomography (PET), 18F-fluorination, [18F]SuFEx, PSMA, FAPI, Medicine |
| الوصف: | Efficient 18 F-fluorination procedures for the production of radiopharmaceuticals are urgently needed to satisfy the increasing demand for clinical diagnostics using positron emission tomography (PET). However, the development of PET tracers is often a time-consuming and challenging process. This work examines the applicability of the recently described sulfur [ 18 F]fluoride exchange ([ 18 F]SuFEx) chemistry as a fast screening approach towards a number of clinically relevant PET tracer preparations. The preparation of a number of 18 F-labeled compounds commenced with [ 18 F]fluoride loading onto a quarternary methylammonium (QMA) cartridge, which was eluted with a methanolic solution containing a base, followed by solvent removal under reduced pressure. Thereafter, the radiolabeling precursors in MeCN were added to the reaction vessels, and allowed to react via [ 18 F]SuFEx at room temperature for 5 min. The radiofluorination reactions were quenched by water dilution followed by C18 cartridge purification. The 18 F-labeled products were isolated by elution from the cartridge with EtOH and the identities of the products were confirmed by radio-ultra high performance liquid chromatography (UHPLC). The optimized preparations of 18 F-labeled prostate-specific membrane antigen (PSMA) inhibitor, Programmed death-ligand 1 (PD-L1) ligand, cyclooxygenase-2 inhibitor (COXIB), and Fibroblast activation protein alpha inhibitor (FAPI) were achieved with high non-decay corrected isolated activity yields (AY) of 33–57% (n = 12) and >95% radiochemical purity (RCP) in 25 min. The automated radiosynthesis procedures afforded the radiolabeled products in an unoptimized 8–15% AY (n = 5), with >95% RCP in 40 min. The ultra-fast [ 18 F]SuFEx reaction permitted several structurally diverse 18 F-labeled compounds for potential imaging to be rapidly achieved in excellent isolated AYs and high RCP. Presently, optimization of the automated radiosynthesis and biological assessment of the 18 F-labeled products is underway. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2673-9992 |
| Relation: | https://www.mdpi.com/2673-9992/14/1/127; https://doaj.org/toc/2673-9992; https://doaj.org/article/54384e0141a64f7d968e1a127df00aef |
| DOI: | 10.3390/ECMC2022-13652 |
| الاتاحة: | https://doi.org/10.3390/ECMC2022-13652 https://doaj.org/article/54384e0141a64f7d968e1a127df00aef |
| رقم الانضمام: | edsbas.16B81B34 |
| قاعدة البيانات: | BASE |
| تدمد: | 26739992 |
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| DOI: | 10.3390/ECMC2022-13652 |