An updated radiosynthesis of [18F]AV1451 for tau PET imaging

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Abstract

Background: [18F]AV1451 is a commonly used radiotracer for imaging tau deposits in Alzheimer’s disease (AD) and related non-AD tauopathies. Existing radiosyntheses of [18F]AV1451 require complex purifications to provide doses suitable for use in clinical imaging studies. To address this issue, we have modified the synthesis of [18F]AV1451 to use only 0.5 mg precursor, optimized the Boc-deprotection step and developed a simplified method for HPLC purification of the radiotracer. Results: An optimized [18F]AV1451 synthesis using a TRACERLab FXFN module led to high radiochemical yield (202 ± 57 mCi per synthesis) and doses with excellent radiochemical purity (98 ± 1%) and good specific activity (2521 ± 623 Ci/mmol). Conclusion: An updated and operationally simple synthesis of [18F]AV1451 has been developed that is fully automated and prepares radiotracer doses suitable for use in clinical tau PET studies.

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Mossine, A. V., Brooks, A. F., Henderson, B. D., Hockley, B. G., Frey, K. A., & Scott, P. J. H. (2017). An updated radiosynthesis of [18F]AV1451 for tau PET imaging. EJNMMI Radiopharmacy and Chemistry, 2(1). https://doi.org/10.1186/s41181-017-0027-7

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