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Role of cAMP/PKA pathway and T-type calcium channels in the mechanism of action of serotonin in human adrenocortical cells. | LitMetric

Role of cAMP/PKA pathway and T-type calcium channels in the mechanism of action of serotonin in human adrenocortical cells.

Mol Cell Endocrinol

Normandie Univ, UNIROUEN, INSERM, DC2N, 76000, Rouen, France; Department of Endocrinology, Diabetes and Metabolic Diseases, University Hospital of Rouen, Rouen, France. Electronic address:

Published: February 2017

AI Article Synopsis

Article Abstract

In human adrenal, serotonin (5-HT), produced by mast cells located in zona glomerulosa, stimulates production of corticosteroids through a paracrine mechanism involving the 5-HT receptor type 4 (5-HT). The aim of the present study was to investigate the transduction mechanisms associated with activation of 5-HT receptors in human adrenocortical cells. Our results show that 5-HT receptors are present in the outer adrenal cortex, both in glomerulosa and fasciculata zonae. In the zona glomerulosa. 5-HT receptor was detected both in immunopositive and immunonegative cells for 11β-hydroxylase, an enzyme involved in cortisol synthesis. The data demonstrate that 5-HT receptors are positively coupled to adenylyl cyclases and cAMP-dependent protein kinases (PKA). The activation of the cAMP-PKA pathway is associated with calcium influx through T-type calcium channels. Both the adenylyl cyclase/PKA pathway and the calcium influx are involved in 5-HT-induced cortisol secretion.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5465225PMC
http://dx.doi.org/10.1016/j.mce.2016.10.008DOI Listing

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