Octopamine, unlike other trace amines, inhibits responses of astroglia-enriched cultures to lipopolysaccharide via a β-adrenoreceptor-mediated mechanism
| Autor: | Antonello D'Arrigo, Giovanni D'Andrea, Alberta Leon, Davide Colavito, Elda Del Giudice, Daniele Bernardini, Fabrizio Facchinetti |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Lipopolysaccharides
medicine.medical_specialty Lipopolysaccharide Tyramine Propranolol Nitric Oxide Receptors G-Protein-Coupled Nitric oxide Rats Sprague-Dawley chemistry.chemical_compound Internal medicine medicine Animals Receptor Octopamine Cells Cultured Trace amine-associated receptor General Neuroscience Octopamine (drug) Pathophysiology Rats Endocrinology chemistry Astrocytes Receptors Adrenergic beta-1 medicine.drug |
| Zdroj: | Neuroscience Letters. 517:36-40 |
| ISSN: | 0304-3940 |
| DOI: | 10.1016/j.neulet.2012.04.013 |
| Popis: | Trace amines (TAs), i.e. β-phenylethylamine, tyramine and octopamine, are generally regarded as sympathomimetic compounds with structural and functional analogy with catecholamines. Previous reports have shown particularly high levels of circulating TAs in migraine and cluster headache patients. However, no clues are yet available as to the pathophysiological significance of these alterations. The effect of different TAs on the release of nitric oxide was investigated in rat astroglial cells stimulated with lipopolysaccharide (LPS). Octopamine substantially inhibited the release of NO evoked by LPS. Tyramine and β-PEA were ineffective. The inhibitory effect of octopamine was fully reverted by two selective antagonists of β-adrenergic receptors, while α-adrenergic blockade was ineffective. These data, consistent with a role of octopamine as a modulator of NO release, uncover an interaction between octopamine and β-adrenergic receptors in astroglial cells. These results may have an impact in understanding the mechanisms underlying migraine pathophysiology. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect