Abstract
3‐Iodothyronamine (T1AM) is a novel metabolite of thyroid hormone. In HEK‐293 cells expressing an orphan G‐protein coupled receptor, the trace amine receptor, T1AM, potently increased cAMP accumulation. In mice, T1AM rapidly induced hypothermia and bradycardia within minutes of administration. These results suggest the existence of a new signaling pathway, the stimulation of which leads to rapid physiological and behavioral consequences. Isotope‐labeled T1AM derivatives would be useful to study the biology and pharmacology of T1AM. Herein we describe efficient syntheses of [125I]‐, [2H]‐, and [3H]‐T1AM.
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