The antidepressant- and anxiolytic-like effects of fluoxetine and clozapine in chronically isolated rats involve inhibition of hippocampal TNF-alpha
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2017
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Brain oxidative stress and neuroinflammation are implicated in psychiatric disorders. Thus, it is important to investigate the effects of individual psychotropic agents on antioxidative defense and proinflammatory mediators in brain regions associated with these disorders. Psychosocial stress is recognized as a threat to mental health, and the hippocampus is a primary target of stress-related damage. Chronic social isolation (CSIS) is a mild psychosocial stress used to model the pathophysiology of depression. We examined the antioxidative and anti-inflammatory potential of the antidepressant fluoxetine (FLX) and atypical antipsychotic clozapine (CLZ) in the hippocampus in the CSIS model of depression. We measured the effects of FLX and CLZ on depressive- and anxiety-like behaviors in non-stressed rats and rats exposed to 21d of CSIS. We further evaluated the content of reduced glutathione (GSH), the protein expression and activity of the GSH-related enzymes, the subcellular localizatio...n of nuclear factor-kappa B (NF-kappa B)and protein levels of proinflammatory mediators cyclooxygenase-2 (COX-2), interleukin-lbeta (IL-1 beta), and tumor necrosis factor-alpha (TNF-alpha) in these groups of rats. CSIS resulted in an increase in depressive- and anxiety-like behaviors that corresponded with compromised glutathione peroxidase (GPx)-mediated antioxidative defense and increased TNF-alpha, but not with changes in NF-kappa B, IL-1 beta and COX-2 levels. FLX and CLZ, applied during CSIS, prevented the behavioral changes associated with CSIS, and inhibited the increase in TNF-alpha, but did not affect GPx-mediated antioxidative defense. Furthermore, both drugs decreased hippocampal GPx activity when applied to non-stressed rats. These results emphasize the significance of hippocampal TNF-alpha-mediated proinflammmatory signaling in the pathophysiology of depressive symptoms and the importance of the anti-inflammatory action of both FLX and CLZ in the prevention of these symptoms.
Ključne reči:
Fluoxetine / Clozapine / Chronic social isolation / Hippocampus / GSH-dependent defense / CytokinesIzvor:
Pharmacology Biochemistry and Behavior, 2017, 163, 57-65Finansiranje / projekti:
- Molekularni mehanizmi patofizioloških promena u ćelijama centralnog nervnog sistema i perifernog tkiva kod sisara (RS-MESTD-Basic Research (BR or ON)-173044)
DOI: 10.1016/j.pbb.2017.10.006
ISSN: 0091-3057
PubMed: 29042248
WoS: 000418215800008
Scopus: 2-s2.0-85033334296
Institucija/grupa
VinčaTY - JOUR AU - Todorović, Nevena AU - Filipović, Dragana PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1875 AB - Brain oxidative stress and neuroinflammation are implicated in psychiatric disorders. Thus, it is important to investigate the effects of individual psychotropic agents on antioxidative defense and proinflammatory mediators in brain regions associated with these disorders. Psychosocial stress is recognized as a threat to mental health, and the hippocampus is a primary target of stress-related damage. Chronic social isolation (CSIS) is a mild psychosocial stress used to model the pathophysiology of depression. We examined the antioxidative and anti-inflammatory potential of the antidepressant fluoxetine (FLX) and atypical antipsychotic clozapine (CLZ) in the hippocampus in the CSIS model of depression. We measured the effects of FLX and CLZ on depressive- and anxiety-like behaviors in non-stressed rats and rats exposed to 21d of CSIS. We further evaluated the content of reduced glutathione (GSH), the protein expression and activity of the GSH-related enzymes, the subcellular localization of nuclear factor-kappa B (NF-kappa B)and protein levels of proinflammatory mediators cyclooxygenase-2 (COX-2), interleukin-lbeta (IL-1 beta), and tumor necrosis factor-alpha (TNF-alpha) in these groups of rats. CSIS resulted in an increase in depressive- and anxiety-like behaviors that corresponded with compromised glutathione peroxidase (GPx)-mediated antioxidative defense and increased TNF-alpha, but not with changes in NF-kappa B, IL-1 beta and COX-2 levels. FLX and CLZ, applied during CSIS, prevented the behavioral changes associated with CSIS, and inhibited the increase in TNF-alpha, but did not affect GPx-mediated antioxidative defense. Furthermore, both drugs decreased hippocampal GPx activity when applied to non-stressed rats. These results emphasize the significance of hippocampal TNF-alpha-mediated proinflammmatory signaling in the pathophysiology of depressive symptoms and the importance of the anti-inflammatory action of both FLX and CLZ in the prevention of these symptoms. T2 - Pharmacology Biochemistry and Behavior T1 - The antidepressant- and anxiolytic-like effects of fluoxetine and clozapine in chronically isolated rats involve inhibition of hippocampal TNF-alpha VL - 163 SP - 57 EP - 65 DO - 10.1016/j.pbb.2017.10.006 ER -
@article{ author = "Todorović, Nevena and Filipović, Dragana", year = "2017", abstract = "Brain oxidative stress and neuroinflammation are implicated in psychiatric disorders. Thus, it is important to investigate the effects of individual psychotropic agents on antioxidative defense and proinflammatory mediators in brain regions associated with these disorders. Psychosocial stress is recognized as a threat to mental health, and the hippocampus is a primary target of stress-related damage. Chronic social isolation (CSIS) is a mild psychosocial stress used to model the pathophysiology of depression. We examined the antioxidative and anti-inflammatory potential of the antidepressant fluoxetine (FLX) and atypical antipsychotic clozapine (CLZ) in the hippocampus in the CSIS model of depression. We measured the effects of FLX and CLZ on depressive- and anxiety-like behaviors in non-stressed rats and rats exposed to 21d of CSIS. We further evaluated the content of reduced glutathione (GSH), the protein expression and activity of the GSH-related enzymes, the subcellular localization of nuclear factor-kappa B (NF-kappa B)and protein levels of proinflammatory mediators cyclooxygenase-2 (COX-2), interleukin-lbeta (IL-1 beta), and tumor necrosis factor-alpha (TNF-alpha) in these groups of rats. CSIS resulted in an increase in depressive- and anxiety-like behaviors that corresponded with compromised glutathione peroxidase (GPx)-mediated antioxidative defense and increased TNF-alpha, but not with changes in NF-kappa B, IL-1 beta and COX-2 levels. FLX and CLZ, applied during CSIS, prevented the behavioral changes associated with CSIS, and inhibited the increase in TNF-alpha, but did not affect GPx-mediated antioxidative defense. Furthermore, both drugs decreased hippocampal GPx activity when applied to non-stressed rats. These results emphasize the significance of hippocampal TNF-alpha-mediated proinflammmatory signaling in the pathophysiology of depressive symptoms and the importance of the anti-inflammatory action of both FLX and CLZ in the prevention of these symptoms.", journal = "Pharmacology Biochemistry and Behavior", title = "The antidepressant- and anxiolytic-like effects of fluoxetine and clozapine in chronically isolated rats involve inhibition of hippocampal TNF-alpha", volume = "163", pages = "57-65", doi = "10.1016/j.pbb.2017.10.006" }
Todorović, N.,& Filipović, D.. (2017). The antidepressant- and anxiolytic-like effects of fluoxetine and clozapine in chronically isolated rats involve inhibition of hippocampal TNF-alpha. in Pharmacology Biochemistry and Behavior, 163, 57-65. https://doi.org/10.1016/j.pbb.2017.10.006
Todorović N, Filipović D. The antidepressant- and anxiolytic-like effects of fluoxetine and clozapine in chronically isolated rats involve inhibition of hippocampal TNF-alpha. in Pharmacology Biochemistry and Behavior. 2017;163:57-65. doi:10.1016/j.pbb.2017.10.006 .
Todorović, Nevena, Filipović, Dragana, "The antidepressant- and anxiolytic-like effects of fluoxetine and clozapine in chronically isolated rats involve inhibition of hippocampal TNF-alpha" in Pharmacology Biochemistry and Behavior, 163 (2017):57-65, https://doi.org/10.1016/j.pbb.2017.10.006 . .