Skip to main content
Top
Published in: Brain Structure and Function 2/2021

01-03-2021 | Original Article

Loss of α7 nicotinic acetylcholine receptors in GABAergic neurons causes sex-dependent decreases in radial glia-like cell quantity and impairments in cognitive and social behavior

Authors: Samir A. Nacer, Ayland C. Letsinger, Simone Otto, Jemma Strauss DeFilipp, Viktoriya D. Nikolova, Natallia V. Riddick, Korey D. Stevanovic, Jesse D. Cushman, Jerrel L. Yakel

Published in: Brain Structure and Function | Issue 2/2021

Login to get access

Abstract

The dentate gyrus (DG) is a unique brain structure in that neurons can be generated postnatally and integrated within existing circuitry throughout life. The maturation process of these newly generated neurons (granule cells) is modulated by nicotinic acetylcholine receptors (nAChRs) through a variety of mechanisms such as neural stem pool proliferation, cell survival, signal modulation, and dendritic integration. Disrupted nAChR signaling has been implicated in neuropsychiatric and neurodegenerative disorders, potentially via alterations in DG neurogenesis. GABAergic interneurons are known to express nAChRs, predominantly the α7 subtype, and have been shown to shape development, integration, and circuit reorganization of DG granule cells. Therefore, we examined histological and behavioral effects of knocking out α7 nAChRs in GABAergic neurons. Deletion of α7 nAChRs resulted in a reduction of radial glia-like cells within the subgranular zone of the DG and a concomitant trend towards decreased immature neurons, specifically in male mice, as well as sex-dependent changes in several behaviors, including social recognition and spatial learning. Overall, these findings suggest α7 nAChRs expressed in GABAergic neurons play an important role in regulating the adult neural stem cell pool and behavior in a sex-dependent manner. This provides important insight into the mechanisms by which cholinergic dysfunction contributes to the cognitive and behavioral changes associated with neurodevelopmental and neurodegenerative disorders.
Appendix
Available only for authorised users
Literature
go back to reference Catavero C, Bao H, Song J (2018) Neural mechanisms underlying GABAergic regulation of adult hippocampal neurogenesis. Cell Tissue Res 371:33–46CrossRefPubMed Catavero C, Bao H, Song J (2018) Neural mechanisms underlying GABAergic regulation of adult hippocampal neurogenesis. Cell Tissue Res 371:33–46CrossRefPubMed
go back to reference Cushman JD, Fanselow MS (2010) Fear conditioning. In: Encyclopedia of behavioral neuroscience. Elsevier, Oxford Cushman JD, Fanselow MS (2010) Fear conditioning. In: Encyclopedia of behavioral neuroscience. Elsevier, Oxford
go back to reference Foresti ML, Arisi GM, Shapiro LA (2011) Role of glia in epilepsy-associated neuropathology, neuroinflammation and neurogenesis. Brain Res Rev 66:115–122CrossRefPubMed Foresti ML, Arisi GM, Shapiro LA (2011) Role of glia in epilepsy-associated neuropathology, neuroinflammation and neurogenesis. Brain Res Rev 66:115–122CrossRefPubMed
go back to reference Galea LAM (2008) Gonadal hormone modulation of neurogenesis in the dentate gyrus of adult male and female rodents. Brain Res Rev 57:332–341CrossRefPubMed Galea LAM (2008) Gonadal hormone modulation of neurogenesis in the dentate gyrus of adult male and female rodents. Brain Res Rev 57:332–341CrossRefPubMed
go back to reference Gonçalves JT, Schafer ST, Gage FH (2016) Adult neurogenesis in the hippocampus: from stem cells to behavior. Cell 167:897–914CrossRefPubMed Gonçalves JT, Schafer ST, Gage FH (2016) Adult neurogenesis in the hippocampus: from stem cells to behavior. Cell 167:897–914CrossRefPubMed
go back to reference Gotti C, Zoli M, Clementi F (2006) Brain nicotinic acetylcholine receptors: native subtypes and their relevance. Trends Pharmacol Sci 27:482–491CrossRefPubMed Gotti C, Zoli M, Clementi F (2006) Brain nicotinic acetylcholine receptors: native subtypes and their relevance. Trends Pharmacol Sci 27:482–491CrossRefPubMed
go back to reference Jonasson Z (2005) Meta-analysis of sex differences in rodent models of learning and memory: a review of behavioral and biological data. Neurosci Biobehav Rev 28:811–825CrossRefPubMed Jonasson Z (2005) Meta-analysis of sex differences in rodent models of learning and memory: a review of behavioral and biological data. Neurosci Biobehav Rev 28:811–825CrossRefPubMed
go back to reference Ma KG, Qian YH (2019) Alpha 7 nicotinic acetylcholine receptor and its effects on Alzheimer’s disease. Neuropeptides 73:96–106CrossRefPubMed Ma KG, Qian YH (2019) Alpha 7 nicotinic acetylcholine receptor and its effects on Alzheimer’s disease. Neuropeptides 73:96–106CrossRefPubMed
Metadata
Title
Loss of α7 nicotinic acetylcholine receptors in GABAergic neurons causes sex-dependent decreases in radial glia-like cell quantity and impairments in cognitive and social behavior
Authors
Samir A. Nacer
Ayland C. Letsinger
Simone Otto
Jemma Strauss DeFilipp
Viktoriya D. Nikolova
Natallia V. Riddick
Korey D. Stevanovic
Jesse D. Cushman
Jerrel L. Yakel
Publication date
01-03-2021
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function / Issue 2/2021
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-020-02179-3

Other articles of this Issue 2/2021

Brain Structure and Function 2/2021 Go to the issue