Erschienen in:
09.01.2024 | Original Article
A bis-boron boramino acid PET tracer for brain tumor diagnosis
verfasst von:
Zhu Li, Junyi Chen, Ziren Kong, Yixin Shi, Mengxin Xu, Bo-Shuai Mu, Nan Li, Wenbin Ma, Zhi Yang, Yu Wang, Zhibo Liu
Erschienen in:
European Journal of Nuclear Medicine and Molecular Imaging
|
Ausgabe 6/2024
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Abstract
Purpose
Boramino acids are a class of amino acid biomimics that replace the carboxylate group with trifluoroborate and can achieve the 18F-labeled positron emission tomography (PET) and boron neutron capture therapy (BNCT) with identical chemical structure.
Methods
This study reports a trifluoroborate-derived boronophenylalanine (BBPA), a derived boronophenylalanine (BPA) for BNCT, as a promising PET tracer for tumor imaging.
Results
Competition inhibition assays in cancer cells suggested the cell accumulation of [18F]BBPA is through large neutral amino acid transporter type-1 (LAT-1). Of note, [18F]BBPA is a pan-cancer probe that shows notable tumor uptake in B16-F10 tumor-bearing mice. In the patients with gliomas and metastatic brain tumors, [18F]BBPA-PET shows good tumor uptake and notable tumor-to-normal brain ratio (T/N ratio, 18.7 ± 5.5, n = 11), higher than common amino acid PET tracers. The [18F]BBPA-PET quantitative parameters exhibited no difference in diverse contrast-enhanced status (P = 0.115–0.687) suggesting the [18F]BBPA uptake was independent from MRI contrast-enhancement.
Conclusion
This study outlines a clinical trial with [18F]BBPA to achieve higher tumor-specific accumulation for PET, provides a potential technique for brain tumor diagnosis, and might facilitate the BNCT of brain tumors.