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Neuromodulatory Effects of Serotonin, 2nd Edition

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Neurobiology".

Deadline for manuscript submissions: 20 September 2026 | Viewed by 2144

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Department of Biomedical Engineering, University of Houston, Houston, TX 77204-5060, USA
Interests: coronary artery disease; stent; noninvasive monitoring; nonlinear dynamics analysis; approximate entropy; 3D co-culture; glioblastoma; astrocytes; tumor microenvironment; PEGDA; addiction; cancer research; data science in medicine
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Special Issue Information

Dear Colleagues,

Serotonin in the central nervous system has been recognized as an important neurotransmitter and neuromodulator which regulates various physiological functions, such as pain sensation, cognition, and emotions like fear, anxiety, and depression. Serotonin implements many complex functions in the body through its widespread and diverse receptors.

Current research activities have found the association of chronic pain and anxiety with synaptic plasticity in the anterior cingulate cortex and the spinal cord. Serotonin shows the multiple modulatory effects of synaptic transmission and plasticity in those structures, including activation, inhibition, and biphasic actions.

GBM, or glioblastoma multiforme, is a brain tumor which is often associated with epileptic seizures. Recent research suggests that neurotransmitters and neuromodulators such as Serotonin, found in the tumor microenvironment, affect the excitability, proliferation, quiescence, and differentiation of neurons, glial cells, and neural stem cells, playing a significant role in various stages of GBMs.

This Special Issue aims to provide selected contributions on advances in the neuromodulatory effects of Serotonin.

Potential topics include, but are not limited to:

  • Large-scale neuromodulation of Serotonin receptor networks.
  • Effects of persistent inward currents on individual motor unit discharge patterns.
  • Effects of Serotonin on retinal inputs in the thalamus.
  • Control of complex adaptive dynamics in the brain.
  • Chronic pain and injury-related anxiety.
  • Peripheral nerve stimulation.
  • Transcranial direct-current stimulation in major depressive disorder.
  • Effects of serotonin on fear learning.
  • Distribution of subcortical neuromodulatory afferents.
  • Emotional memory processing during REM sleep.
  • Role of Serotonin in Glioblastoma Multiforme (GBM).

Dr. Yasemin M. Akay
Guest Editor

Manuscript Submission Information

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Keywords

  • neuromodulation
  • Serotonin
  • pain research
  • cognition
  • emotions
  • depression
  • anxiety
  • GBM

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Published Papers (2 papers)

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Research

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20 pages, 3213 KB  
Article
Impact of 5-HT4 Receptors on Neuron–Glial Network Activity In Vitro
by Elena V. Mitroshina, Ekaterina A. Marasanova and Maria V. Vedunova
Int. J. Mol. Sci. 2025, 26(16), 7718; https://doi.org/10.3390/ijms26167718 - 9 Aug 2025
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Abstract
5-HT4 receptors play an important role in the regulation of synaptic plasticity. However, the effect of 5-HT4Rs on neural network activity and intercellular calcium signaling remains enigmatic. Using calcium imaging and original software, we determined the network-level characteristics of calcium dynamics within primary [...] Read more.
5-HT4 receptors play an important role in the regulation of synaptic plasticity. However, the effect of 5-HT4Rs on neural network activity and intercellular calcium signaling remains enigmatic. Using calcium imaging and original software, we determined the network-level characteristics of calcium dynamics within primary hippocampal cultures. We found that the single activation of 5-HT4 receptors by BIMU8 significantly reduced the correlation of activity within neuron–glial networks of primary cultures, without altering the proportion of active cells or the frequency of calcium events. In contrast, chronic stimulation of 5-HT4Rs promoted greater cell involvement in Ca2+ signal generation and increased the frequency of calcium events, while maintaining the connectivity level of the neuron–glial network. Moreover, our immunocytochemical labeling results indicated that chronic stimulation of 5-HT4Rs increased the size of both presynaptic and postsynaptic terminals. The acute blockade of 5-HT4Rs by RS23597-190 exerted a marked inhibitory effect on calcium activity in primary hippocampal cultures. Network connectivity and correlation of calcium activity were disrupted, and the number of functional connections among cells sharply declined. Our study showed that 5-HT4 receptors exhibit diverse effects based on the type and duration of activation, mediating several key functions in regulating neural network calcium activity. Full article
(This article belongs to the Special Issue Neuromodulatory Effects of Serotonin, 2nd Edition)
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Review

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23 pages, 1209 KB  
Review
Differential Autoregulation of Serotonin Secretion at Different Structures of Serotonergic Neurons
by Citlali Trueta and Montserrat G. Cercós
Int. J. Mol. Sci. 2026, 27(3), 1150; https://doi.org/10.3390/ijms27031150 - 23 Jan 2026
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Abstract
Serotonin (5-HT) performs a wide range of neuromodulatory actions in the nervous system, including the regulation of the neurons that release it, by activation of several types of autoreceptors that modulate their electrical activity, as well as its own release. 5-HT neurons release [...] Read more.
Serotonin (5-HT) performs a wide range of neuromodulatory actions in the nervous system, including the regulation of the neurons that release it, by activation of several types of autoreceptors that modulate their electrical activity, as well as its own release. 5-HT neurons release serotonin in different manners from different subcellular structures, including the presynaptic terminals, the somatodendritic region and the axons. The different releasing structures of the same neurons have different types of autoreceptors, which exert differential auto-regulatory effects. Here we critically review the evidence of serotonergic autoregulation, both in mammals and in invertebrates, with particular emphasis on studies of serotonergic Retzius neurons of the leech, which have been a model for detailed studies of serotonin secretion from different neuronal structures. In these neurons serotonin produces different and even opposite effects on different releasing structures, such as the presynaptic terminals and the soma, through activation of different types of autoreceptors, thus increasing the specialization of the mechanisms that regulate exocytosis from each site. The differential autoregulation of serotonin release from different structures enables a single neuron to exert a variety of different functions in the nervous system. Full article
(This article belongs to the Special Issue Neuromodulatory Effects of Serotonin, 2nd Edition)
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