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How serotonin receptors regulate morphogenic signalling in neurons.

Authors
  • Wirth, Alexander1
  • Holst, Katrin1
  • Ponimaskin, Evgeni2
  • 1 Department of Cellular Neurophysiology, Hannover Medical School, Hannover, Germany. , (Germany)
  • 2 Department of Cellular Neurophysiology, Hannover Medical School, Hannover, Germany. Electronic address: [email protected] , (Germany)
Type
Published Article
Journal
Progress in neurobiology
Publication Date
April 2017
Volume
151
Pages
35–56
Identifiers
DOI: 10.1016/j.pneurobio.2016.03.007
PMID: 27013076
Source
Medline
Keywords
License
Unknown

Abstract

Serotonin (5-hydroxytrympamine or 5-HT) is one of the phylogenetically oldest neurotransmitters, and the serotonergic system is among the earliest developed neuronal systems. Serotonin is critically involved in regulating multiple physiological functions, acting via a heterogenic receptor family that includes G protein-coupled receptors and ligand-gated ion channels. Although serotonergic neurons comprise a widely distributed and complex network that targets nearly every brain structure, serotonin-mediated signalling is under strict temporal and spatial control. Imbalance in serotonergic signalling is implicated in many pathophysiological conditions, including schizophrenia, Alzheimer's disease, depression, and anxiety. In addition to its well-established role as a neurotransmitter, serotonin is involved in many aspects of neural development, including neurite outgrowth, somatic morphology regulation, growth cone motility, synaptogenesis, and control of dendritic spine shape and density. The morphogenic effects of serotonin are developmentally regulated, and serotonin availability during sensitive developmental stages can modulate the formation and functions of behaviourally relevant neuronal networks in adulthood. Here we provide an overview of the molecular mechanisms responsible for the morphogenic effects of serotonin elicited by its different receptors in neurons. We also discuss the role of serotonin receptor-mediated morphogenic signalling in the development and maintenance of pathophysiological conditions.

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