Cited by 49Neuroscience and Neuropharmacology ResearchNeurogenesis and neuroplasticity mechanismsNeural dynamics and brain function

High serotonin levels during brain development alter the structural input-output connectivity of neural networks in the rat somatosensory layer IV

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Miceli, Stéphanie, Negwer, Moritz, van Eijs, Fenneke, Kalkhoven, Carla, van Lierop, Ilja, Homberg, Judith, Schubert, Dirk·2013·Frontiers in Cellular Neuroscience

Abstract

Homeostatic regulation of serotonin (5-HT) concentration is critical for "normal" topographical organization and development of thalamocortical (TC) afferent circuits. Down-regulation of the serotonin transporter (SERT) and the consequent impaired reuptake of 5-HT at the synapse, results in a reduced terminal branching of developing TC afferents within the primary somatosensory cortex (S1). Despite the presence of multiple genetic models, the effect of high extracellular 5-HT levels on the structure and function of developing intracortical neural networks is far from being understood. Here, using juvenile SERT knockout (SERT(-/-)) rats we investigated, in vitro, the effect of increased 5-HT levels on the structural organization of (i) the TC projections of the ventroposteromedial thalamic nucleus toward S1, (ii) the general barrel-field pattern, and (iii) the electrophysiological and morphological properties of the excitatory cell population in layer IV of S1 [spiny stellate (SpSt) and pyramidal cells]. Our results confirmed previous findings that high levels of 5-HT during development lead to a reduction of the topographical precision of TCA projections toward the barrel cortex. Also, the barrel pattern was altered but not abolished in SERT(-/-) rats. In layer IV, both excitatory SpSt and pyramidal cells showed a significantly reduced intracolumnar organization of their axonal projections. In addition, the layer IV SpSt cells gave rise to a prominent projection toward the infragranular layer Vb. Our findings point to a structural and functional reorganization of TCAs, as well as early stage intracortical microcircuitry, following the disruption of 5-HT reuptake during critical developmental periods. The increased projection pattern of the layer IV neurons suggests that the intracortical network changes are not limited to the main entry layer IV but may also affect the subsequent stages of the canonical circuits of the barrel cortex.

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Crossref · 10.3389/fncel.2013.00088

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  • Serotonin plays important neurotrophic roles during early development, and elevations of 5-HT during critical time periods can alter cognition and sensory processing.

    “Serotonin plays important neurotrophic roles during early development, and elevations of 5-HT during critical time periods can alter cognition and sensory processing [109].”

    From The Gut Microbiota and Dysbiosis in Autism Spectrum Disorders (2018) · cites this paper as [109]

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Authors
Miceli, S., Negwer, M., van Eijs, F., Kalkhoven, C., van Lierop, I., Homberg, J., & Schubert, D.
Affiliations
Radboud University Nijmegen (NL)
Corresponding author
Miceli, Stéphanie
Venue
Frontiers in Cellular Neuroscience
Published
2013
Volume
7
Pages
88-88
ISSN
1662-5102 (ISSN-L)
OpenAlex
W2148476512
Cited by
49
References
98
Citations by year
2026: 4 · 2025: 6 · 2024: 3 · 2022: 1 · 2021: 5 · 2020: 3 · 2019: 2 · 2018: 6 · 2017: 4 · 2016: 7 · 2015: 3 · 2014: 3 · 2013: 2
FWCI
2.45
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Cellular Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Radboud Repository (Radboud University) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Max Planck Digital Library (submittedVersion, other-oa)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • Radboud Repository (Radboud University) (submittedVersion, other-oa)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
serotonin, serotonin transporter, thalamocortical afferents, primary somatosensory cortex, layer 4, barrel cortex, topographic map, spiny stellate cells, pyramidal neurons, cortical development, neural network reorganization

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