Fully Automated Radiosynthesis of [18F]mG4P027 for mGluR4 Imaging.

Fully Automated Radiosynthesis of [18F]mG4P027 for mGluR4 Imaging.
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用于 mGluR4 成像的 [18F]mG4P027 全自动放射合成。

DOI:
10.1002/ird3.25
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发表时间:
2023
期刊:
iRadiology
影响因子:
--
通讯作者:
Wang,Junfeng
Wang,Junfeng
中科院分区:
--
文献类型:
--
作者:
Moon,Sung-Hyun;ElFakhri,Georges;Zhang,Zhaoda;Brownell,Anna-Liisa;Wang,Junfeng

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BackgroundFluorine‐18 labeled N‐(4‐chloro‐3‐(((fluoro‐18F)methyl‐d2)thio)phenyl)picolinamide, [18F]mG4P027, is a potent positron emission tomography (PET) radiotracer for mGluR4. Our previous in vitro and in vivo evaluations have demonstrated that this tracer is promising for further translational studies. However, automated radiosynthesis process poses significant challenges that need to be addressed.MethodsThe automated radiosynthesis was performed using the TRACERlab FX2N module, which comprises two distinct reactors capable of accommodating the two‐step reactions. Several problem‐solving strategies were employed to overcome challenges during the automation process. This included modifications to the reaction solvents, reaction conditions, use of a scavenger, drying methods, and the handling of the precursor.ResultsThe use ofn‐Bu4NN3for scavenging excess compound1along with an efficient drying procedure played a key role in the success of the radiosynthesis. The water was successfully removed by using a different duct to overcome the water sensitivity for the second reaction.ConclusionsSignificant modifications were made to the manual process by carefully examining this process and addressing the root causes of the challenges associated with its automation. We successfully implemented automated radiosynthesis using the TRACERlab FX2N module and consequently, obtained a high‐purity radiolabeled [18F]mG4P027in high yield, meeting the requirements for future human studies.
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