Article (Scientific journals)
Fully automated 18F-fluorination of N-succinimidyl-4-[18F]fluorobenzoate ([18F]SFB) for indirect labelling of nanobodies.
Nagachinta, Surasa; Novelli, Paolo; Joyard, Yoann et al.
2022In Scientific Reports, 12 (1), p. 18655
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Keywords :
Fluorine Radioisotopes; Single-Domain Antibodies; Succinimides; Fluorides; Benzoates; Radiopharmaceuticals; Halogenation; Isotope Labeling/methods; Succinimides/chemistry; Benzoates/chemistry; Radiopharmaceuticals/chemistry; Positron-Emission Tomography/methods; Fluorine Radioisotopes/chemistry; Multidisciplinary
Abstract :
[en] N-succinimidyl-4-[18F]fluorobenzoate ([18F]SFB), a widely used labeling agent to introduce the 4-[18F]fluorobenzoyl-prosthetic group, is normally obtained in three consecutive steps from [18F]fluoride ion. Here, we describe an efficient one-step labeling procedure of [18F]SFB starting from a tin precursor. This method circumvents volatile radioactive side-products and simplifies automatization. [18F]SFB was obtained after HPLC purification in a yield of 42 + 4% and a radiochemical purity (RCP) > 99% (n = 6). In addition, we investigate the automation of the coupling of [18F]SFB to a nanobody (cAbBcII10, targeting β-lactamase enzyme) and purification by size exclusion chromatography (PD-10 desalting column) to remove unconjugated reagent. Production and use of [18F]SFB were implemented on a radiosynthesis unit (Neptis®). The fully automated radiosynthesis process including purification and formulation required 160 min of synthesis time. [18F]SFB-labeled nanobody was obtained in a yield of 21 + 2% (activity yield 12 + 1% non-decay corrected) and a radiochemical purity (RCP) of > 95% (n = 3). This approach simplifies [18F]SFB synthesis to one-step, enhances the yield in comparison to the previous report and enables the production of radiolabeled nanobody on the same synthesis module.
Research Center/Unit :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Disciplines :
Chemistry
Radiology, nuclear medicine & imaging
Author, co-author :
Nagachinta, Surasa ;  Université de Liège - ULiège > Département des sciences cliniques > Neuroimagerie des troubles de la mémoire et revalidation cognitive
Novelli, Paolo ;  Université de Liège - ULiège > Département de chimie (sciences)
Joyard, Yoann;  ORA Neptis, Philippeville, Belgium
Maindron, Nicolas;  ORA Neptis, Philippeville, Belgium
Riss, Patrick ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie organique-nucléaire
Dammicco, Sylvestre ;  Université de Liège - ULiège > Département de chimie (sciences)
Language :
English
Title :
Fully automated 18F-fluorination of N-succinimidyl-4-[18F]fluorobenzoate ([18F]SFB) for indirect labelling of nanobodies.
Publication date :
04 November 2022
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Springer Science and Business Media LLC, England
Volume :
12
Issue :
1
Pages :
18655
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Biowin Program PIT of the Walloon Region
Funders :
BioWin - BioWin : pôle santé de Wallonie
Available on ORBi :
since 08 November 2022

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