Abstract
Recent advances in the self-shielded cyclotrons, improved targets, videomonitored hot cells design, and automated PET radiopharmaceutical (RPs) synthesis modules, utilizing computer-controlled graphic user interphase (GUI) has revolutionized PET molecular imaging technology for basic biomedical research and theranostics to accomplish the ultimate goal of evidence-based personalized medicine. Particularly, [18F]HX4: (3-[18F]fluoro-2-(4-((2-nitro-1Himidazol-1-yl)methyl)-1H-1,2,3,-triazol-1- yl)-propan-1-ol), 18F-FAZA: 1-(5-[18F]Fluoro-5-deoxy-α-D-arabinofuranosyl)-2- nitroimidazole, and 18F-FMSIO: 18F-Ffluoromisonidazole to assess tumor hypoxia, [18F]FB-VAD-FMK: [18F]4-fluorobenzylcarbonyl-Val-Ala-Asp(OMe)-fluoromethylketone to determine in vivo apoptosis, 64Cu-PTSM: 64Cu-Pyrualdehyde Bis-NMethylthiosemicarbazone for brain and myocardial perfusion imaging, and 68Ga-DOTATOC: 68Ga- DOTAD-Phy1-Tyr3-octreotide and 68Ga-DOTANOC: 68Ga-(1,4,7,10-tetraazacyclododecane- N,N’,N’’,N’’’-tetraacetic acid)-1-NaI3-octreotide for neuroendocrine and neural crest tumors have demonstrated great promise in personalized theranostics. Furthermore, multimodality imaging with 124IPET/ CT and 18FDG-PET/CT rationalizes 131I treatment in thyroid cancer patients to prevent cost and morbid toxicity. In addition to 18F-labeled PET-RPs used in clinical practice, novel discoveries of chemical reactions including transition metal-mediated cross-coupling of carbon-carbon, carbonheterocarbon, and click chemistry at ambient temperature with significantly reduced synthesis times, labeled even with short-lived radionuclides such as 11C, has facilitated development of novel PET-RPs. These innovative approaches to synthesize PET-RPs and efficient image acquisition capabilities have improved the resolution of multimodality imaging and significantly reduced the radiation exposure to patients as well as healthcare professionals. Future developments in novel PET-RPs, utilizing automated microfluidic synthesis modules and multifunctional nanoparticles, will improve biomarker discovery, internal dosimetry, pharmacokinetics, immunotherapy, and stem cell tracking in regenerative medicine. This review provides recent developments in the synthesis of clinically-significant cyclotron and generator- based PET-RPs with potential applications in cardiovascular diseases, neurodegenerative diseases, and cancer to accomplish the ultimate goal of evidence-based personalized theranostics.
Keywords: Click chemistry, immunotherapy, multimodality fusion imaging, personalized theranostics, shielded cyclotron, targets.
Graphical Abstract
Call for Papers in Thematic Issues
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