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Chronic Treatment with Fluoxetine or Clozapine of Socially Isolated Rats Prevents Subsector-Specific Reduction of Parvalbumin Immunoreactive Cells in the Hippocampus

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2018
Contributors
Filipović, Dragana
Stanisavljević, Andrijana
Jasnić, Nebojša
Bernardi, Rick E.
Inta, Dragos
Perić, Ivana
Gass, Peter
Article (Published version)
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Abstract
The dysfunction of parvalbumin-positive (PV+) interneurons, the most abundant type of hippocampal GABAergic inhibitory interneuron, has been implicated in mood disorders. We recently reported that adult male Wistar rats exposed to three weeks of social isolation show depressive-and anxiety-like behaviors and a reduced number of PV+ interneurons in all hippocampal subregions. As GABA neurotransmission has been proposed as a potential therapeutic target of antidepressant and antipsychotic medications, we examined whether treatment with the antidepressant fluoxetine (Flx) (15 mg/kg/day) or the antipsychotic clozapine (Clz) (20 mg/kg/day) during three weeks of social isolation in rats offered protection from the isolation stress-induced reduction in the number of PV+ interneurons in hippocampal subregions. Using immunofluorescence analysis, we revealed that both chronic Flx and Clz partially prevented the isolation-induced changes. Flx prevented the reduction in the number of PV+ interneur...ons in the CA2, CA3, without affecting the CA1 and dentate gyrus DG areas, whereas Clz prevented this decrement in the CA2, CA3 and DG regions but not in CA1 areas. Moreover, Flx increased the number of PV+ interneurons in CA1 in control animals. These findings suggest that chronic administration of Flx or Clz may offer partial protection from social isolation stress via modulation of the hippocampal GABAergic system. (C) 2017 IBRO. Published by Elsevier Ltd. All rights reserved.

Keywords:
chronic social isolation / fluoxetine / clozapine / parvalbumin / hippocampus
Source:
Neuroscience, 2018, 371, 384-394
Funding / projects:
  • Effects of metabolic and nonmetabolic stressors on the expression and action of neuroendocrine regulators of energy homeostasis (RS-173023)
  • Deutsche Forschungsgemeinschaft [IN168/3-1, SFB636-TP3]; Ingeborg Stander Foundation; Research Fund of the UPK Basel; German Ministry of Education and Research (BMBF) [01GQ1003B]

DOI: 10.1016/j.neuroscience.2017.12.020

ISSN: 0306-4522

PubMed: 29275206

WoS: 000425876200031

Scopus: 2-s2.0-85040029943
[ Google Scholar ]
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31
URI
https://vinar.vin.bg.ac.rs/handle/123456789/7584
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  • WoS Import
Institution/Community
Vinča
TY  - JOUR
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7584
AB  - The dysfunction of parvalbumin-positive (PV+) interneurons, the most abundant type of hippocampal GABAergic inhibitory interneuron, has been implicated in mood disorders. We recently reported that adult male Wistar rats exposed to three weeks of social isolation show depressive-and anxiety-like behaviors and a reduced number of PV+ interneurons in all hippocampal subregions. As GABA neurotransmission has been proposed as a potential therapeutic target of antidepressant and antipsychotic medications, we examined whether treatment with the antidepressant fluoxetine (Flx) (15 mg/kg/day) or the antipsychotic clozapine (Clz) (20 mg/kg/day) during three weeks of social isolation in rats offered protection from the isolation stress-induced reduction in the number of PV+ interneurons in hippocampal subregions. Using immunofluorescence analysis, we revealed that both chronic Flx and Clz partially prevented the isolation-induced changes. Flx prevented the reduction in the number of PV+ interneurons in the CA2, CA3, without affecting the CA1 and dentate gyrus DG areas, whereas Clz prevented this decrement in the CA2, CA3 and DG regions but not in CA1 areas. Moreover, Flx increased the number of PV+ interneurons in CA1 in control animals. These findings suggest that chronic administration of Flx or Clz may offer partial protection from social isolation stress via modulation of the hippocampal GABAergic system. (C) 2017 IBRO. Published by Elsevier Ltd. All rights reserved.
T2  - Neuroscience
T1  - Chronic Treatment with Fluoxetine or Clozapine of Socially Isolated Rats Prevents Subsector-Specific Reduction of Parvalbumin Immunoreactive Cells in the Hippocampus
VL  - 371
SP  - 384
EP  - 394
DO  - 10.1016/j.neuroscience.2017.12.020
ER  - 
@article{
year = "2018",
abstract = "The dysfunction of parvalbumin-positive (PV+) interneurons, the most abundant type of hippocampal GABAergic inhibitory interneuron, has been implicated in mood disorders. We recently reported that adult male Wistar rats exposed to three weeks of social isolation show depressive-and anxiety-like behaviors and a reduced number of PV+ interneurons in all hippocampal subregions. As GABA neurotransmission has been proposed as a potential therapeutic target of antidepressant and antipsychotic medications, we examined whether treatment with the antidepressant fluoxetine (Flx) (15 mg/kg/day) or the antipsychotic clozapine (Clz) (20 mg/kg/day) during three weeks of social isolation in rats offered protection from the isolation stress-induced reduction in the number of PV+ interneurons in hippocampal subregions. Using immunofluorescence analysis, we revealed that both chronic Flx and Clz partially prevented the isolation-induced changes. Flx prevented the reduction in the number of PV+ interneurons in the CA2, CA3, without affecting the CA1 and dentate gyrus DG areas, whereas Clz prevented this decrement in the CA2, CA3 and DG regions but not in CA1 areas. Moreover, Flx increased the number of PV+ interneurons in CA1 in control animals. These findings suggest that chronic administration of Flx or Clz may offer partial protection from social isolation stress via modulation of the hippocampal GABAergic system. (C) 2017 IBRO. Published by Elsevier Ltd. All rights reserved.",
journal = "Neuroscience",
title = "Chronic Treatment with Fluoxetine or Clozapine of Socially Isolated Rats Prevents Subsector-Specific Reduction of Parvalbumin Immunoreactive Cells in the Hippocampus",
volume = "371",
pages = "384-394",
doi = "10.1016/j.neuroscience.2017.12.020"
}
(2018). Chronic Treatment with Fluoxetine or Clozapine of Socially Isolated Rats Prevents Subsector-Specific Reduction of Parvalbumin Immunoreactive Cells in the Hippocampus. in Neuroscience, 371, 384-394.
https://doi.org/10.1016/j.neuroscience.2017.12.020
Chronic Treatment with Fluoxetine or Clozapine of Socially Isolated Rats Prevents Subsector-Specific Reduction of Parvalbumin Immunoreactive Cells in the Hippocampus. in Neuroscience. 2018;371:384-394.
doi:10.1016/j.neuroscience.2017.12.020 .
"Chronic Treatment with Fluoxetine or Clozapine of Socially Isolated Rats Prevents Subsector-Specific Reduction of Parvalbumin Immunoreactive Cells in the Hippocampus" in Neuroscience, 371 (2018):384-394,
https://doi.org/10.1016/j.neuroscience.2017.12.020 . .

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