A molecularly imprinted polymer (MIP) film based electrochemical sensor for selective determination of tyramine was devised, fabricated, and tested. Tyramine is generated in smoked fermented food products. Therefore, it may serve as a marker the rottenness these Importantly, intake large amounts by patients treated with monoamine oxidase (MAO) inhibitors lead to “cheese effect”, namely, dangero...

SEE CORRESPONDING ARTICLE ON PAGE 16 TAAR1-Dependent and -Independent Actions of Tyramine in Interaction With Glutamate Underlie Central Effects Monoamine Oxidase InhibitionBiological PsychiatryVol. 90Issue 1PreviewMonoamine oxidase inhibitors (MAOIs) exert therapeutic actions by elevating extracellular levels monoamines the brain. Irreversible MAOIs cause serious hypertensive crises owing to p...

The catecholamines norepinephrine and epinephrine regulate important physiological functions in vertebrates. In insects; these neuroactive substances are functionally replaced by the phenolamines octopamine and tyramine. Phenolamines activate specific guanine nucleotide-binding (G) protein-coupled receptors (GPCRs). Type 1 tyramine receptors are better activated by tyramine than by octopamine. ...

BACKGROUND Despite the widespread use of tyramine as a pharmacological tool to assess the effects of norepinephrine release from sympathetic nerve terminals, its vascular effects are not adequately characterized. In particular, previous results indicate that intravenous tyramine produces little if any systemic vasoconstriction, suggesting that tyramine does not cause significant norepinephrine ...

We reported previously that intravenous administration of tyramine induced a paradoxical forearm vasodilation and an increase in plasma dopamine, raising the possibility that dopamine is released by or converted from tyramine in vivo. Alternatively, tyramine can be nonenzymatically oxidized into dopamine in vitro, and this contamination may be responsible for the increase in plasma dopamine and...

The Malpighian (renal) tubule of Drosophila melanogaster is a useful model for studying epithelial transport. The purpose of this study was to identify factors responsible for modulating transepithelial chloride conductance in isolated tubules. I have found that tyrosine and several of its metabolites cause an increase in chloride conductance. The most potent of these agonists is tyramine, whic...

Octopamine biosynthesis requires tyrosine decarboxylase to convert tyrosine into tyramine and tyramine beta-hydroxylase to convert tyramine into octopamine. We identified and characterized a Caenorhabditis elegans tyrosine decarboxylase gene, tdc-1, and a tyramine beta-hydroxylase gene, tbh-1. The TBH-1 protein is expressed in a subset of TDC-1-expressing cells, indicating that C. elegans has t...

Honeybees are well known for their complex division of labor. Each bee sequentially performs a series of social tasks during its life. The changes in social task performance are linked to gross differences in behavior and physiology. We tested whether honeybees performing different social tasks (nursing versus foraging) would differ in their gustatory responsiveness and associative learning beh...

Abstract Two sensitive and effective methods were developed for the detection of catecholamines related biogenic amines (dopamine, epinephrine, norepinephrine, serotonin, levodopa tyramine) using high performance liquid chromatography with fluorescence capillary electrophoresis laser-induced detection. A BODIPY fluorescent dye, 1, 3, 5, 7-tetramethyl-8-( N -hydroxysuccinimidyl propionic ester)-...