Cited by 161Neurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology ResearchDevelopmental Biology and Gene Regulation

Spatial and temporal bias in the mitotic origins of somatostatin- and parvalbumin-expressing interneuron subgroups and the chandelier subtype in the medial ganglionic eminence

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Inan, M., Welagen, J., Anderson, S. A.·2012·Cerebral Cortex

Abstract

GABAergic interneurons modulate cortical activity through the actions of distinct subgroups. Recent studies using interneuron transplants have shown tremendous promise as cell-based therapies for seizure disorders, Parkinson's disease, and in the study of neocortical plasticity. Previous reports identified a spatial bias for the origins of parvalbumin (PV)- and somatostatin (SST)-expressing interneuron subgroups within the medial ganglionic eminence (MGE). In the current study, the mitotic origins of these interneurons are examined by harvesting MGE cells at 2 time points and evaluating their neurochemical profiles after transplantation into neonatal mouse cortex. Although the dorsal MGE (dMGE)-SST and ventral MGE (vMGE)-PV bias were confirmed, both subgroups originate from progenitors located throughout the MGE. The dMGE bias was also found for SST subgroups that coexpress calretinin or reelin. In contrast, another major subgroup of SST interneuron, neuropeptide Y-expressing, does not appear to originate within the MGE. Finally, novel evidence is provided that a clinically important subtype of PV-expressing interneuron, the chandelier (axo-axonic) cell, is greatly enriched in transplants from the vMGE at embryonic day 15. These findings have important implications both for the study of interneuron fate determination and for studies that use interneuron precursor transplantation to alter cortical activity.

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Crossref · 10.1093/cercor/bhr148

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  • Chandelier cells are most frequent in layers 2 and 6 although they are preferentially generated toward the end of neurogenesis.

    “chandelier cells are most frequent in layers 2 and 6 of neocortex although they are preferentially generated toward the end of neurogenesis”

    From Development and Functional Diversification of Cortical Interneurons (2018) · cites this paper as Inan et al., 2012

  • MGE progenitors generate most SST+ interneurons during the first half of the neurogenic period, whereas PV+ interneurons are produced at an almost constant rate throughout neurogenesis.

    “MGE progenitors generate most SST+ interneurons during the first half of the neurogenic period, whereas PV+ interneurons are produced at an almost constant rate throughout neurogenesis”

    From Development and Functional Diversification of Cortical Interneurons (2018) · cites this paper as Inan et al., 2012

  • The intermediate MGE produces both PV+ and SST+ interneurons with a rostral PV+ to caudal SST+ bias.

    “The intermediate MGE produces both PV+ and SST+ interneurons with a rostral (PV+) to caudal (SST+) bias”

    From Development and Functional Diversification of Cortical Interneurons (2018) · cites this paper as Inan et al., 2012

  • E13.5 MGE and E14.5 CGE/LGE correspond to peak neurogenesis in these structures.

    “We manually dissected the embryonic day (E)13.5 MGE or E14.5 CGE and LGE from wild type mouse embryos, timepoints corresponding to peak neurogenesis in these structures7,8”
  • PV-expressing AAC neurogenesis preferentially occurs beyond E15.5, after the MGE has morphologically flattened into a ventral germinal zone.

    “PV-expressing AAC neurogenesis preferentially occurs beyond E15.5 after the MGE has morphologically flattened out into a ventral germinal zone of the lateral ventricle”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [519]

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Authors
Inan, M., Welagen, J., & Anderson, S. A.
Affiliations
Cornell University (US)
Venue
Cerebral Cortex
Published
2011-06-21
Volume
22
Issue
4
Pages
820-827
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2163007828
Cited by
161
References
49
Citations by year
2026: 5 · 2025: 11 · 2024: 6 · 2023: 9 · 2022: 10 · 2021: 12 · 2020: 14 · 2019: 9 · 2018: 14 · 2017: 17 · 2016: 14 · 2015: 7 · 2014: 19 · 2013: 9 · 2012: 4
FWCI
3.47
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (K02MH070031, R01MH066912)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
medial ganglionic eminence, somatostatin interneurons, parvalbumin interneurons, chandelier cells, calretinin, reelin, GABAergic interneurons
MeSH terms
Reelin Protein, Analysis of Variance, Animals, Animals, Newborn, Bromodeoxyuridine, Cell Count, Cell Differentiation, Embryo, Mammalian, Female, Interneurons, Male, Mice, Transgenic, Nerve Tissue Proteins, Parvalbumins, Pregnancy, Somatostatin, Telencephalon, Time Factors, Gene Expression Regulation, Developmental, Neocortex, Green Fluorescent Proteins, Mice, Embryonic Stem Cells

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