2-[(18)F]Fluoro-L-phenylalanine and 2-[(18)F]fluoro-L-tyrosine have been developed as promising radiopharmaceuticals for molecular imaging using positron emission tomography (PET). However, the lack of a convenient radiosynthetic pathway has limited their practical use. In this work a new three-step nucleophilic synthesis of these
The ribosome-catalyzed peptidyl transferase reaction displays a complex pH profile resulting from two functional groups whose deprotonation is important for the reaction, one within the A-site substrate and a second unidentified group thought to reside in the rRNA peptidyl transferase
Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 37(2), 320-325 (1996-02-01)
L-[methyl-11C]methionine (11C-Met) is a useful tracer for tumor imaging with PET. The drawbacks include a short half-life and high physiological accumulation in abdominal organs. To overcome these shortfalls, the feasible use of [18F]fluorophenylalanine (18F-Phe), which shares the same amino acid
Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 36(7), 1232-1237 (1995-07-01)
Neutral amino acids (NAAs) are transported from the blood to the brain using the same carrier system in a competitive fashion. The purpose of this study is to establish a method for evaluating neutral amino acid transport at the blood-brain
Annals of nuclear medicine, 8(3), 213-217 (1994-08-01)
We studied the brain uptake of amino acid in a patient with acute cerebral infarction with L-[2-(F-18)]fluorophenylalanine and positron emission tomography. The increased accumulation of the ligand was specifically found in the peri-infarct area where oxygen metabolism was still maintained
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