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Title: Effect of 3-methyl-branching on the myocardial retention of radioiodinated 19-iodo-18-nonadecenoic acid analogues. Author: Goodman MM, Neff KH, Ambrose KR, Knapp FF. Journal: Int J Rad Appl Instrum B; 1989; 16(8):813-9. PubMed ID: 2621117. Abstract: The effect of methyl-branching at the 3(beta-)-position on myocardial uptake and retention of fatty acids where radioiodide has been stabilized as a terminal trans-(E)-vinyl iodide has been evaluated in fasted rats. The syntheses of two new dimethyl-branched fatty acids, 17-iodo-3,3-dimethylheptadecanoic acid (14) and (E)-19-iodo-3,3-dimethyl-18-nonadecenoic acid (19), are described. Tissue distribution studies in fasted rats with [125I]-19 showed significant heart uptake (2 min, 4.56% dose/g), and prolonged retention (60 min 4.10% dose-g). These results suggest that [123I]-19 is a good candidate for further studies of regional myocardial fatty acid uptake patterns by SPECT.[Abstract] [Full Text] [Related] [New Search]