Cited by 69Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Nicotinic α5 Subunits Drive Developmental Changes in the Activation and Morphology of Prefrontal Cortex Layer VI Neurons

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Bailey, Craig D.C., Alves, Nyresa C., Nashmi, Raad, De Biasi, Mariella, Lambe, Evelyn K.·2012·Biological Psychiatry

Abstract

Background Nicotinic signaling in prefrontal layer VI pyramidal neurons is important to the function of mature attention systems. The normal incorporation of α5 subunits into α4β2* nicotinic acetylcholine receptors augments nicotinic signaling in these neurons and is required for normal attention performance in adult mice. However, the role of α5 subunits in the development of the prefrontal cortex is not known. Methods We sought to answer this question by examining nicotinic currents and neuronal morphology in layer VI neurons of medial prefrontal cortex of wild-type and α5 subunit knockout (α5−/−) mice during postnatal development and in adulthood. Results In wild-type but not in α5−/− mice, there is a developmental peak in nicotinic acetylcholine currents in the third postnatal week. At this juvenile time period, the majority of neurons in all mice have long apical dendrites extending into cortical layer I. Yet, by early adulthood, wild-type but not α5−/− mice show a pronounced shift toward shorter apical dendrites. This cellular difference occurs in the absence of genotype differences in overall cortical morphology. Conclusions Normal developmental changes in nicotinic signaling and dendritic morphology in prefrontal cortex depend on α5-comprising nicotinic acetylcholine receptors. It appears that these receptors mediate a specific developmental retraction of apical dendrites in layer VI neurons. This finding provides novel insight into the cellular mechanisms underlying the known attention deficits in α5−/− mice and potentially also into the pathophysiology of developmental neuropsychiatric disorders such as attention-deficit disorder and autism.

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Crossref · 10.1016/j.biopsych.2011.09.011

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  • Key developing PFC circuitry is shaped by acetylcholine, and PFC pyramidal neurons depend on its proper signaling in terms of dendritic branching, spine formation and synaptogenesis.

    “Key developing PFC circuitry is shaped by acetylcholine, and PFC pyramidal neurons depend on its proper signaling in terms of dendritic branching, spine formation and synaptogenesis [224–226].”

    From Development of prefrontal cortex (2022) · cites this paper as [226]

    The Results section reports that α5-containing nicotinic receptors influence dendritic complexity and developmental changes in the apical dendrites of medial PFC layer VI neurons. This supports a role for acetylcholine signaling in dendritic morphology, but the paper does not establish effects on spine formation or synaptogenesis, or extend its findings to all PFC pyramidal neurons. (LLM, conf=0.88)

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Authors
Bailey, C. D. C., Alves, N. C., Nashmi, R., De Biasi, M., & Lambe, E. K.
Affiliations
  • University of Toronto (CA)
  • University of Victoria (CA)
Corresponding author
Lambe, Evelyn K.
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2012-01
Volume
71
Issue
2
Pages
120-128
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2070469268
Cited by
69
References
64
Citations by year
2026: 5 · 2025: 2 · 2024: 2 · 2023: 7 · 2022: 3 · 2021: 6 · 2020: 1 · 2019: 5 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 7 · 2014: 8 · 2013: 5 · 2012: 2
FWCI
1.95
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
Canadian Institutes of Health Research (89825)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
nicotinic acetylcholine receptors, alpha5 subunit, alpha4beta2 nicotinic receptor, prefrontal cortex, dendritic morphology, postnatal development, attention deficits, attention deficit disorder, autism spectrum disorder
MeSH terms
Animals, Male, Membrane Potentials, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Receptors, Nicotinic, Prefrontal Cortex, Mice, Knockout, Mice

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