Characterization of 3-iodothyronamine in vitro dynamics by mathematical modeling.

Abstract:

:3-Iodothyronamine (T1AM) is regarded as a hormone-like substance thanks to its endogenous nature, its interaction with specific receptors trace amine-associated receptor 1 and its biological effects. We characterized T1AM transport and conversion in an in vitro culture of H9c2 murine cells, after a T1AM bolus injection. Samples of cell medium culture and cell lysate were assayed by high-performance liquid chromatography coupled to tandem mass spectrometry. We performed comparative experiments by adding to T1AM bolus amino oxidase inhibitors as iproniazid, pargyline (monoamine oxidase, MAO inhibitors), aminoguanidine, and semicarbazide (semicarbazide-sensitive amino oxidase, SSAO inhibitors). A mathematical model was developed, based on the assumption that T1AM is transported with a mechanism that is typical of hormone transport (i.e., EGF or insulin). We noticed that surface receptors downregulation could play a major role in T1AM dynamics. We also estimated that T1AM catabolism is mainly affected by MAO inhibitors, which produce a dramatic decrease in the kinetic constants related to T1AM degradation, while no significant changes were observed in experiments with SSAO inhibitors.

journal_name

Cell Biochem Biophys

authors

Orsi G,Ghelardoni S,Saba A,Zucchi R,Vozzi G

doi

10.1007/s12013-013-9680-y

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

37-47

issue

1

eissn

1085-9195

issn

1559-0283

journal_volume

68

pub_type

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