Cited by 224Neuroscience and Neuropharmacology ResearchNeural dynamics and brain functionNeurogenesis and neuroplasticity mechanisms

Early somatostatin interneuron connectivity mediates the maturation of deep layer cortical circuits

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Tuncdemir, Sebnem N., Wamsley, Brie, Stam, Floor J., Osakada, Fumitaka, Goulding, Martyn, Callaway, Edward M., Rudy, Bernardo, Fishell, Gord·2016·Neuron

Abstract

The precise connectivity of somatostatin and parvalbumin cortical interneurons is generated during development. An understanding of how these interneuron classes incorporate into cortical circuitry is incomplete but essential to elucidate the roles they play during maturation. Here, we report that somatostatin interneurons in infragranular layers receive dense but transient innervation from thalamocortical afferents during the first postnatal week. During this period, parvalbumin interneurons and pyramidal neurons within the same layers receive weaker thalamocortical inputs, yet are strongly innervated by somatostatin interneurons. Further, upon disruption of the early (but not late) somatostatin interneuron network, the synaptic maturation of thalamocortical inputs onto parvalbumin interneurons is perturbed. These results suggest that infragranular somatostatin interneurons exhibit a transient early synaptic connectivity that is essential for the establishment of thalamic feedforward inhibition mediated by parvalbumin interneurons.

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  • Transient connections made by early-born SST+ interneurons are required for maturation of PV+ basket cells in deep layers.

    “In addition, the transient connections established by early-born SST+ interneurons are also required for the maturation of PV+ basket cells in deep layers (Tuncdemir et al., 2016).”

    From Development and Functional Diversification of Cortical Interneurons (2018) · cites this paper as Tuncdemir et al., 2016

  • Layer 5 SST+ interneurons receive dense transient thalamic inputs during the first postnatal week and innervate layer 4 excitatory neurons, layer 5 pyramidal cells and immature PV+ interneurons.

    “Interestingly, layer 5 SST+ interneurons receive dense transient thalamic inputs during the first week of postnatal development and innervate both layer 4 excitatory neurons and layer 5 pyramidal cells and immature PV+ interneurons (Marques-Smith et al., 2016; Tuncdemir et al., 2016).”

    From Development and Functional Diversification of Cortical Interneurons (2018) · cites this paper as Tuncdemir et al., 2016

  • Interneurons that engage in transient connections during the first postnatal week do not appear to be selectively eliminated by programmed cell death.

    “Although this remains to be investigated thoroughly, interneurons that engage in transient connections during the first week of postnatal development do not seem to be selectively eliminated through programmed cell death (Tuncdemir et al., 2016).”

    From Development and Functional Diversification of Cortical Interneurons (2018) · cites this paper as Tuncdemir et al., 2016

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Authors
Tuncdemir, S. N., Wamsley, B., Stam, F. J., Osakada, F., Goulding, M., Callaway, E. M., Rudy, B., & Fishell, G.
Affiliations
  • New York University (US)
  • Salk Institute for Biological Studies (US)
  • NYU Langone Health (US)
Corresponding author
Fishell, Gord
Venue
Neuron
Publisher
Elsevier BV
Published
2016-02
Volume
89
Issue
3
Pages
521-535
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2257395058
Cited by
224
References
74
Citations by year
2026: 13 · 2025: 22 · 2024: 26 · 2023: 21 · 2022: 19 · 2021: 40 · 2020: 19 · 2019: 20 · 2018: 13 · 2017: 19 · 2016: 12
FWCI
12.00
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5r01ns030989-22)
  • National Institute of Mental Health (R01MH063912, MH0639123, T32MH015174, R01MH068469, R01MH071679, MH095147, R01MH095147, R37MH071679)
  • National Eye Institute (EY022577, R01EY022577)
  • National Institute of Neurological Disorders and Stroke (R01-NS030989, R01NS086372, NS 081297, P01NS074972, NS080586, R01 NS30989, R01NS090919, NS090919, R01NS080586, NS086372, R01NS081297, T32NS086750)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
somatostatin interneurons, parvalbumin interneurons, thalamocortical afferents, synapse maturation, feedforward inhibition, postnatal development, pyramidal neurons
MeSH terms
Animals, Cerebral Cortex, Interneurons, Neural Pathways, Parvalbumins, Somatostatin, Thalamus, Pyramidal Cells, Mice

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