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Chronic lithium treatment decreases NG2 cell proliferation in rat dentate hilus, amygdala and corpus callosum

Orre, Karin LU ; Wennström, Malin LU and Tingström, Anders LU (2009) In Progress in Neuro-Psychopharmacology and Biological Psychiatry 33(3). p.503-510
Abstract
An increasing number of investigations suggest volumetric changes and glial pathology in several brain regions of patients with bipolar disorder. Lithium, used in the treatment of this disorder, has been reported to be neuroprotective and increase brain volume. Here we investigate the effect of lithium on the proliferation and survival of glial cells positive for the chondroitin sulphate proteoglycan NG2 (NG2 cells); a continuously dividing cell type implicated in remyelination and suggested to be involved in regulation of neuronal signaling and axonal outgrowth. Adult male rats were treated with lithium for four weeks and injected with the proliferation marker bromodeoxyuridine (BrdU) before or at the end of the treatment period.... (More)
An increasing number of investigations suggest volumetric changes and glial pathology in several brain regions of patients with bipolar disorder. Lithium, used in the treatment of this disorder, has been reported to be neuroprotective and increase brain volume. Here we investigate the effect of lithium on the proliferation and survival of glial cells positive for the chondroitin sulphate proteoglycan NG2 (NG2 cells); a continuously dividing cell type implicated in remyelination and suggested to be involved in regulation of neuronal signaling and axonal outgrowth. Adult male rats were treated with lithium for four weeks and injected with the proliferation marker bromodeoxyuridine (BrdU) before or at the end of the treatment period. Immunohistochemical analysis of brain sections was performed to estimate the number of newly born (BrdU-labeled) NG2 cells and oligodendrocytes in hippocampus, basolateral nuclei of amygdala and corpus callosum. Lithium significantly decreased the proliferation of NG2 cells in dentate hilus of hippocampus, amygdala and corpus callosum, but not in the molecular layer or the cornu ammonis (CA) regions of hippocampus. The effect was more pronounced in the corpus callosum. No effect of lithium on the survival of newborn cells or the number of newly generated oligodendrocytes could be detected. Our results demonstrate that in both white and gray matter brain regions implicated in the pathophysiology of bipolar disorder, chronic lithium treatment significantly decreases the proliferation rate of NG2 cells; the major proliferating cell type of the adult brain. (C) 2009 Elsevier Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cells, NG2, Lithium, Hippocampus, Corpus callosum, Amygdala, Bipolar disorder
in
Progress in Neuro-Psychopharmacology and Biological Psychiatry
volume
33
issue
3
pages
503 - 510
publisher
Elsevier
external identifiers
  • wos:000265470500017
  • pmid:19439244
  • scopus:62849111262
ISSN
0278-5846
DOI
10.1016/j.pnpbp.2009.01.015
language
English
LU publication?
yes
id
614ddb81-207f-462b-825b-dd66d0da2fd4 (old id 1399433)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/19439244?dopt=Abstract
date added to LUP
2009-06-15 15:23:52
date last changed
2017-01-01 05:09:50
@article{614ddb81-207f-462b-825b-dd66d0da2fd4,
  abstract     = {An increasing number of investigations suggest volumetric changes and glial pathology in several brain regions of patients with bipolar disorder. Lithium, used in the treatment of this disorder, has been reported to be neuroprotective and increase brain volume. Here we investigate the effect of lithium on the proliferation and survival of glial cells positive for the chondroitin sulphate proteoglycan NG2 (NG2 cells); a continuously dividing cell type implicated in remyelination and suggested to be involved in regulation of neuronal signaling and axonal outgrowth. Adult male rats were treated with lithium for four weeks and injected with the proliferation marker bromodeoxyuridine (BrdU) before or at the end of the treatment period. Immunohistochemical analysis of brain sections was performed to estimate the number of newly born (BrdU-labeled) NG2 cells and oligodendrocytes in hippocampus, basolateral nuclei of amygdala and corpus callosum. Lithium significantly decreased the proliferation of NG2 cells in dentate hilus of hippocampus, amygdala and corpus callosum, but not in the molecular layer or the cornu ammonis (CA) regions of hippocampus. The effect was more pronounced in the corpus callosum. No effect of lithium on the survival of newborn cells or the number of newly generated oligodendrocytes could be detected. Our results demonstrate that in both white and gray matter brain regions implicated in the pathophysiology of bipolar disorder, chronic lithium treatment significantly decreases the proliferation rate of NG2 cells; the major proliferating cell type of the adult brain. (C) 2009 Elsevier Inc. All rights reserved.},
  author       = {Orre, Karin and Wennström, Malin and Tingström, Anders},
  issn         = {0278-5846},
  keyword      = {cells,NG2,Lithium,Hippocampus,Corpus callosum,Amygdala,Bipolar disorder},
  language     = {eng},
  number       = {3},
  pages        = {503--510},
  publisher    = {Elsevier},
  series       = {Progress in Neuro-Psychopharmacology and Biological Psychiatry},
  title        = {Chronic lithium treatment decreases NG2 cell proliferation in rat dentate hilus, amygdala and corpus callosum},
  url          = {http://dx.doi.org/10.1016/j.pnpbp.2009.01.015},
  volume       = {33},
  year         = {2009},
}