title: The synthesis and evaluation of radioiodinated 14-(iodophenyl)-3-(R,S)methyltetradecanoic acid.
abstract: Radiohalogenated fatty acids (FA) labelled with gamma-emitting isotopes have a potentially important application in studies of impaired myocardial perfusion and metabolism. Evaluation of straight-chain fatty acids radiolabelled in different positions on the FA chain has been reported by many groups. In this paper we extended our recent studies using the betamethyl branched-chain fatty acid. The synthesis, labelling and preliminary evaluation of 131I- and 123I-14-(iodophenyl)-3-(R,S)methyltetradecanoic acid (I-PBMTA) are reported. This radiolabel concentrates in the mouse myocardium with 16% injected dose g-1 and 11% injected dose g-1 at 15 and 30 min, respectively. The images of the canine heart postinjection indicate a high myocardial extraction of the label with activity retained over an hour. The rate of washout of the activity from the heart was very low. This analogue is a potential agent for myocardial imaging studies.
mesh_terms: D000818:Animals; D003327:Coronary Disease / Q000000981:diagnostic imaging; D004285:Dogs; D006321:Heart / Q000000981:diagnostic imaging*; D007457:Iodine Radioisotopes; D007553:Isotope Labeling; D051379:Mice; D009227:Myristic Acids / Q000138:chemical synthesis* / Q000378:metabolism; D011877:Radionuclide Imaging; D014018:Tissue Distribution
chemical_list: D007457:Iodine Radioisotopes; D009227:Myristic Acids; C046420:14-(iodophenyl)-3-methyltetradecanoic acid