Abstract
Thyronamines are decarboxylated derivatives of thyroid hormone. 3-Iodothyronamine (T1AM) has been detected in blood and in several tissues. where it is likely produced from thyroid hormone by the consequent action of aromatic amino acid decarboxylase and deiodinases. In vitro, high-affinity interaction has been observed between T1AM and a novel G-protein-coupled receptor known as trace-amine-associated receptor 1 (TAAR1). TAAR1 and other receptors of this family are expressed in several tissues, including the heart. Functional effects have been observed after administration of exogenous T1AM: in the isolated heart, a negative inotropic and chronotropic action was produced, and the resistance to ischemic injury was increased, possibly as a consequence of an action on intracellular calcium homeostasis. Extracardiac effects include reduction of body temperature, increased lipid versus carbohydrate metabolism, modulation of insulin secretion, and inhibition of neuronal catecholamine reuptake. T1AM may play an important physiological or pathophysiological role, and this signaling system might allow the development of new therapeutic agents.
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Zucchi, R., Ghelardoni, S., Chiellini, G. (2009). Cardiac Functional Effects of 3-iodothyronamine, a New Endogenous Thyroid Hormone Derivative. In: Iervasi, G., Pingitore, A. (eds) Thyroid and Heart Failure. Springer, Milano. https://doi.org/10.1007/978-88-470-1143-4_6
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DOI: https://doi.org/10.1007/978-88-470-1143-4_6
Publisher Name: Springer, Milano
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