Modulatory effect of dopamine receptor 5 on the neurosecretory Dahlgren cells of the olive flounder, Paralichthys olivaceus
| Autor: | Mo Zhou, Huafeng Zou, Weiqun Lu, Jinling Xu, Zhaohui Lan, Yingxin Chen, Wei Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Levodopa medicine.medical_specialty medicine.drug_class Dopamine Population Cell Count Flounder Biology Receptors Dopamine 03 medical and health sciences 0302 clinical medicine Endocrinology Internal medicine medicine Animals RNA Messenger education Receptor education.field_of_study Receptors Dopamine D2 Sequence Analysis RNA Receptor antagonist biology.organism_classification Neurosecretory Systems Olive flounder 030104 developmental biology Hypothalamus Dopamine receptor Dopamine Antagonists Animal Science and Zoology Transcriptome 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | General and Comparative Endocrinology. 266:67-77 |
| ISSN: | 0016-6480 |
| Popis: | A neuromodulatory role for dopamine has been reported for magnocellular neuroendocrine cells in the mammalian hypothalamus. We examined its potential role as a local intercellular messenger in the neuroendocrine Dahlgren cell population of the caudal neurosecretory system (CNSS) of the euryhaline flounder Paralichthys olivaceus . In vitro application of dopamine (DA) caused an increase in electrical activity (firing frequency, recorded extracellularly) of Dahlgren cells, recruitment of previously silent cells, together with a greater proportion of cells showing phasic (irregular) activity. The dopamine precursor, levodopa (L-DOPA), also increased firing frequency, cell recruitment and enhanced bursting and tonic activity. The effect of dopamine was blocked by the D1, D5 receptor antagonist SCH23390, but not by the D2, D3, D4 receptor antagonist amisulpride. Transcriptome sequencing revealed that all DA receptors (D1, D2, D3, D4, and D5) were present in the flounder CNSS. However, quantitative RT-PCR revealed that D5 receptor mRNA expression was significantly increased in the CNSS following dopamine superfusion. These findings suggest that dopamine may modulate CNSS activity in vivo , and therefore neurosecretory output, through D5 receptors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect