Radiosynthesis and preliminary biological evaluation of a new (18)F-labeled triethylene glycol derivative of triphenylphosphonium.
J Labelled Comp Radiopharm
; 59(3): 117-23, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-26861736
ABSTRACT
Delocalized lipophilic cations such as [(18)F]fluorobenzyltriphenylphosphonium ([(18)F]FBnTP) can accumulate in mitochondria and have been used in myocardial perfusion imaging (MPI). In this study, we established a simplified method for [(18)F]FBnTP synthesis using triphenylphosphine hydrobromide (PPh3 â¢HBr) without preparing an intermediate that contains benzyl bromide structure. Applying this new method, we synthesized and evaluated a novel (18)F-labeled PEGylated BnTP derivative ([(18)F]FPEGBnTP). In vitro cellular uptake study demonstrated that [(18)F]FPEGBnTP accumulated in cells in proportion to the relative intensity of mitochondrial membrane potential. Biodistribution study revealed that the heart liver uptake ratio of [(18)F]FPEGBnTP (4.00 at 60 min) was superior to that of [(18)F]FBnTP (1.50 at 60 min). However, [(18)F]FPEGBnTP showed slow blood clearance and high radioactivity uptake in bone at 120-min post-injection. These results imply the possibility of [(18)F]FPEGBnTP being used as a MPI agent. However, there is a need of further structural optimization and flow-dependent uptake study.
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01-internacional
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MEDLINE
Assunto principal:
Compostos Organofosforados
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Polietilenoglicóis
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Radioisótopos de Flúor
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Compostos Radiofarmacêuticos
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article