Abstinence following Alcohol Drinking Produces Depression-Like Behavior and Reduced Hippocampal Neurogenesis in Mice
Open Access
- 18 June 2008
- journal article
- research article
- Published by Springer Science and Business Media LLC in Neuropsychopharmacology
- Vol. 34 (5), 1209-1222
- https://doi.org/10.1038/npp.2008.90
Abstract
Alcoholism and depression show high degrees of comorbidity. Clinical evidence also indicates that depression that emerges during abstinence from chronic alcohol use has a greater negative impact on relapse than pre-existing depression. Although no single neurobiological mechanism can account for the behavioral pathologies associated with these devastating disorders, converging evidence suggests that aspects of both alcoholism and depression are linked to reductions in hippocampal neurogenesis. Here, we report results from a novel preclinical behavioral model showing that abstinence from voluntary alcohol drinking leads to the emergence of depression-like behavior and reductions in neurogenesis. C57BL/6J mice were allowed to self-administer ethanol (10% v/v) vs H2O in the home cage for 28 days. Alcohol was then removed for 1 or 14 days, and mice were tested in the forced swim test to measure depression-like behavior. After 14 days, but not 1 day of abstinence from alcohol drinking, mice showed a significant increase in depression-like behavior. The significant increase in depression-like behavior during abstinence was associated with a reduction in proliferating cell nuclear antigen (PCNA) and doublecortin (DCX) immunoreactivity in the dentate gyrus of the hippocampus indicating that both the number of proliferating neural progenitor cells (NPC) and immature neurons were reduced, respectively. The number of NPCs that were labeled with bromo-deoxyuridine (BrdU) at the beginning of alcohol exposure was not altered indicating that survival of NPCs is not linked to abstinence-induced depression. Chronic treatment (14 days) with the antidepressant desipramine during abstinence prevented both the emergence of depression-like behavior and the reduction in hippocampal neurogenesis indicating that abstinence-induced depression is associated with structural plasticity in the hippocampus. Overall, the results of this study support the conclusion that profound functional (ie behavioral) and structural changes occur during abstinence from alcohol use and suggest that antidepressant treatment may alleviate some of these pathological neurobehavioral adaptations.Keywords
This publication has 89 references indexed in Scilit:
- Elevated anxiety-like behavior following ethanol exposure in mutant mice lacking neuropeptide Y (NPY)Drug and Alcohol Dependence, 2007
- Determination of key aspects of precursor cell proliferation, cell cycle length and kinetics in the adult mouse subgranular zoneNeuroscience, 2007
- Stress and adult neurogenesisHippocampus, 2006
- Moderate ethanol consumption increases hippocampal cell proliferation and neurogenesis in the adult mouseInternational Journal of Neuropsychopharmacology, 2005
- Effects of alcohol on brain-derived neurotrophic factor mRNA expression in discrete regions of the rat hippocampus and hypothalamusJournal of Neuroscience Research, 2001
- Stress-induced changes of norepinephrine uptake sites in the locus coeruleus of C57BL/6J and DBA/2J mice: a quantitative autoradiographic study using [3H]-tomoxetineNeuroscience Letters, 1999
- Comorbidity between DSM-IV drug use disorders and major depression: Results of a national survey of adultsJournal of Substance Abuse, 1995
- Adult neurogenesis is regulated by adrenal steroids in the dentate gyrusNeuroscience, 1994
- Cyclin (PCNA, auxiliary protein of DNA polymerase δ) is a central component of the pathway(s) leading to DNA replication and cell divisionFEBS Letters, 1987
- Acute and chronic stress effects on performance in a forced-swim taskBehavioral and Neural Biology, 1984