Cited by 19Neurogenesis and neuroplasticity mechanismsTreatment of Major DepressionNeuroscience and Neuropharmacology Research

Antidepressants and Cdk inhibitors: Releasing the brake on neurogenesis?

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Chesnokova, Vera, Pechnick, Robert N.·2008·Cell Cycle

Abstract

It is now clear that neurogenesis occurs in the brain of adult mammals. Many studies have attempted to establish relationships among neurogenesis, depression and the mechanism of action of antidepressant drugs. Therapeutic effects of antidepressants appear to be linked to increased neurogenesis in the hippocampus. Cdk inhibitors are expressed in multiple brain regions, presumably maintaining quiescence in differentiated neurons. Recently, the abundant expression of p21(Cip1) was found in neuroblasts and in newly developing neurons in the subgranular zone of the hippocampus, a region where adult neurogenesis occurs. Chronic treatment with the tricyclic antidepressant imipramine markedly decreased p21(Cip1) mRNA and protein levels and stimulated neurogenesis in this region. These results suggest that p21(Cip1) restrains neurogenesis in the hippocampus, and antidepressant-induced stimulation of neurogenesis might be a consequence of decreased p21(Cip1) expression, with the subsequent release of neuronal progenitor cells from the blockade of proliferation. These findings suggest the potential for new therapeutic strategies for the treatment of depression that target cell cycle proteins. However, there is a possibility that long-term stimulation of neurogenesis might exhaust the proliferation potentials of neuronal progenitors.

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Research works printed but not linked: 3

  1. L A N D E S B I O S C I E N C E . D O N O T D I S T R I B U T E . Cell Cycle 2008; Vol. 7 Issue 15
  2. van Lookeren Campagne M, Gill R. Tumor-suppressor p53 is expressed in proliferating and newly formed neurons of the embryonic and postnatal rat brain: comparison with expres- sion of the cell cycle regulators p21 Waf1/Cip1 , p27 Kip1 , p57 Kip2 , p16 Ink4a , cyclin G 1 , and the proto-oncogene Bax. J Comp Neurol 1998; 397:181-98.
  3. Weiss S, van der Kooy D. CNS stem cells: where's the biology (a.k.a. beef )? J Neurobiol 1998; 36:307-14.

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Authors
Chesnokova, V., & Pechnick, R. N.
Affiliations
Cedars-Sinai Medical Center (US)
Venue
Cell Cycle
Published
2008-08
Volume
7
Issue
15
Pages
2321-2326
ISSN
  • 1538-4101 (ISSN-L)
  • 1551-4005
OpenAlex
W2043768203
Cited by
19
References
98
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 1 · 2021: 1 · 2019: 1 · 2017: 1 · 2015: 1 · 2013: 2 · 2012: 1
FWCI
0.14
Type
journal article
Language
en
Open access
Locations
  • Cell Cycle (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Alliance for Research on Schizophrenia and Depression
  • National Institutes of Health
  • National Institute of Mental Health (MH079370, R21MH078037, MH078037, R21MH079988, MH 079988, R21MH079370)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
adult neurogenesis, antidepressants, cyclin-dependent kinase inhibitors, p21, imipramine, hippocampus, depression, neural progenitor cells, cell cycle regulation, subgranular zone, tricyclic antidepressants
MeSH terms
Animals, Antidepressive Agents, Brain, Cell Cycle, Cell Differentiation, Depression, Humans, Mammals, Neurons, Cyclin-Dependent Kinase Inhibitor Proteins, Adult Stem Cells

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