Study Report
Reference
| Citation | Hlavacova, 2011 PubMed |
| Full Info | Hlavacova, N., Wes, P.D., Ondrejcakova, M., Flynn, M.E., Poundstone, P.K., Babic, S., Murck, H. and Jezova, D. (2011) Subchronic treatment with aldosterone induces depression-like behaviours and gene expression changes relevant to major depressive disorder. Int J Neuropsychopharmacol, 1-19.
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Study
| Hypothesis or Background |
The potential role of aldosterone in the pathophysiology of depression is unclear. The aim of this study was to test the hypothesis that prolonged elevation of circulating aldosterone induces depression-like behaviour accompanied by disease-relevant changes in gene expression in the hippocampus.
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| Sample Information | rat |
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| Method Detail | Subchronic (2-wk) treatment with aldosterone (2 mug/100 g body weight per day) or vehicle via subcutaneous osmotic minipumps was used to induce hyperaldosteronism in male rats. All rats (n=20/treatment group) underwent a modified sucrose preference test. Half of the animals from each treatment group were exposed to the forced swim test (FST), which served both as a tool to assess depression-like behaviour and as a stress stimulus. Affymetrix microarray analysis was used to screen the entire rat genome for gene expression changes in the hippocampus. Aldosterone treatment induced an anhedonic state manifested by decreased sucrose preference. |
| Method Keywords | dose administration; sucrose preference test; forced swimming test; microarray |
| Result | In the FST, depressogenic action of aldosterone was manifested by decreased latency to immobility and increased time spent immobile. Aldosterone treatment resulted in transcriptional changes of genes in the hippocampus involved in inflammation, glutamatergic activity, and synaptic and neuritic remodelling. Furthermore, aldosterone-regulated genes substantially overlapped with genes affected by stress in the FST. This study demonstrates the existence of a causal relationship between the hyperaldosteronism and depressive behaviour. In addition, aldosterone treatment induced changes in gene expression that may be relevant to the aetiology of major depressive disorder. |
| Conclusions | Subchronic treatment with aldosterone represents a new animal model of depression, which may contribute to the development of novel targets for the treatment of depression. |
Relationships reported by
Hlavacova, 2011
| Component A Approved Name (Name in Paper) |
Component A Type |
Component B Approved Name (Name in Paper) |
Component B Type |
Statistical Result |
Relationship Description |
Result Category (Positive/Negative)) |
|
anhedonic-like behavior from animal model (anhedonic-like behavior)
|
cognition and behavior |
Aldosterone (aldosterone) |
molecule |
|
Aldosterone treatment induced an anhedonic state manifested by decreased sucrose preference |
Positive
|
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inflammatory response (inflammation)
|
pathway |
Aldosterone (aldosterone) |
molecule |
|
Aldosterone treatment resulted in transcriptional changes of genes in the hippocampus involved in inflammation. |
Positive
|
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regulation of synaptic plasticity (synaptic and neuritic remodelling)
|
pathway |
Aldosterone (aldosterone) |
molecule |
|
Aldosterone treatment resulted in transcriptional changes of genes in the hippocampus involved in synaptic and neuritic remodelling |
Positive
|
|
synaptic transmission, glutamatergic (glutamatergic activity)
|
pathway |
Aldosterone (aldosterone) |
molecule |
|
Aldosterone treatment resulted in transcriptional changes of genes in the hippocampus involved in glutamatergic activity. |
Positive
|
|
Hippocampus (hippocampus)
|
brain morphology and function |
Aldosterone (aldosterone) |
molecule |
|
Aldosterone treatment resulted in transcriptional changes of genes in the hippocampus involved in inflammation, glutamatergic activity, and synaptic and neuritic remodelling. |
Positive
|
