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The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge

It is well known that neonatal pro-inflammatory challenge (NPC) acquire a predisposition to the development of a number of neuropsychiatric diseases: depression, anxiety disorders, autism, attention deficit hyperactivity disorder. Symptoms of these diseases can manifest themselves in adulthood and a...

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Autores principales: Pavlova, Irina V., Broshevitskaya, Nadezda D., Zaichenko, Mariya I., Grigoryan, Grigory A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10236189/
https://www.ncbi.nlm.nih.gov/pubmed/37274935
http://dx.doi.org/10.1016/j.bbih.2023.100639
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author Pavlova, Irina V.
Broshevitskaya, Nadezda D.
Zaichenko, Mariya I.
Grigoryan, Grigory A.
author_facet Pavlova, Irina V.
Broshevitskaya, Nadezda D.
Zaichenko, Mariya I.
Grigoryan, Grigory A.
author_sort Pavlova, Irina V.
collection PubMed
description It is well known that neonatal pro-inflammatory challenge (NPC) acquire a predisposition to the development of a number of neuropsychiatric diseases: depression, anxiety disorders, autism, attention deficit hyperactivity disorder. Symptoms of these diseases can manifest themselves in adulthood and adolescent after repeated exposure to negative influences. Preventing the development of the negative consequences of NPC is one of the main tasks for researchers. The exposure to an enriched environment (EE) was shown to have anxiolytic, anti-depressive, and pro-cognitive effects. The present work was aimed to investigate the effects of the long-term EE on anxious-depressive and conditioned fear behavior in normal male and female rats and subjected to NPC. The NPC was induced by subcutaneous administration of lipopolysaccharide (LPS, 50 μg/kg) on 3d and 5th PNDs. The control animals received saline (SAL). The rats were placed in the EE from 25 to 120 PND. Animals housed in the standard conditions (STAND) served as controls. In adult female and male rats of the STAND groups, LPS did not affect the anxiety, depressive-like behavior and conditioned fear. The EE increased motor and search activity in males and females. In the open field, the EE reduced anxiety in males of the SAL and LPS groups and in females of SAL groups compared to the STAND housed animals. In the elevated plus maze, the EE decreased anxiety only in males of the SAL group. In the sucrose preference test, the EE did not change sucrose consumption in males and females of SAL and LPS groups, while, in the forced swimming test, the EE reduced depressive-like behavior in females of both SAL and LPS groups. The enrichment decreased the contextual conditioned fear in male and female of SAL groups, but not of the LPS group, and did not affect the cue conditioned fear. The corticosterone reactivity to the forced swimming stress increased in males of the EE groups. The basal level of IL-1beta in blood serum decreased in males of the SAL-EE group. Thus, the EE reduced anxiety in males, depressive-like behavior in females, and contextual conditioned fear in males and females compared to the STAND housed animals. Although the NPC did not affect these behaviors in the STAND groups, LPS prevented the beneficial EE effects on anxiety and conditioned fear. The opposing effects of LPS were dependent on sex and type of testing.
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spelling pubmed-102361892023-06-03 The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge Pavlova, Irina V. Broshevitskaya, Nadezda D. Zaichenko, Mariya I. Grigoryan, Grigory A. Brain Behav Immun Health Full Length Article It is well known that neonatal pro-inflammatory challenge (NPC) acquire a predisposition to the development of a number of neuropsychiatric diseases: depression, anxiety disorders, autism, attention deficit hyperactivity disorder. Symptoms of these diseases can manifest themselves in adulthood and adolescent after repeated exposure to negative influences. Preventing the development of the negative consequences of NPC is one of the main tasks for researchers. The exposure to an enriched environment (EE) was shown to have anxiolytic, anti-depressive, and pro-cognitive effects. The present work was aimed to investigate the effects of the long-term EE on anxious-depressive and conditioned fear behavior in normal male and female rats and subjected to NPC. The NPC was induced by subcutaneous administration of lipopolysaccharide (LPS, 50 μg/kg) on 3d and 5th PNDs. The control animals received saline (SAL). The rats were placed in the EE from 25 to 120 PND. Animals housed in the standard conditions (STAND) served as controls. In adult female and male rats of the STAND groups, LPS did not affect the anxiety, depressive-like behavior and conditioned fear. The EE increased motor and search activity in males and females. In the open field, the EE reduced anxiety in males of the SAL and LPS groups and in females of SAL groups compared to the STAND housed animals. In the elevated plus maze, the EE decreased anxiety only in males of the SAL group. In the sucrose preference test, the EE did not change sucrose consumption in males and females of SAL and LPS groups, while, in the forced swimming test, the EE reduced depressive-like behavior in females of both SAL and LPS groups. The enrichment decreased the contextual conditioned fear in male and female of SAL groups, but not of the LPS group, and did not affect the cue conditioned fear. The corticosterone reactivity to the forced swimming stress increased in males of the EE groups. The basal level of IL-1beta in blood serum decreased in males of the SAL-EE group. Thus, the EE reduced anxiety in males, depressive-like behavior in females, and contextual conditioned fear in males and females compared to the STAND housed animals. Although the NPC did not affect these behaviors in the STAND groups, LPS prevented the beneficial EE effects on anxiety and conditioned fear. The opposing effects of LPS were dependent on sex and type of testing. Elsevier 2023-05-24 /pmc/articles/PMC10236189/ /pubmed/37274935 http://dx.doi.org/10.1016/j.bbih.2023.100639 Text en © 2023 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Full Length Article
Pavlova, Irina V.
Broshevitskaya, Nadezda D.
Zaichenko, Mariya I.
Grigoryan, Grigory A.
The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
title The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
title_full The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
title_fullStr The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
title_full_unstemmed The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
title_short The influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
title_sort influence of long-term housing in enriched environment on behavior of normal rats and subjected to neonatal pro-inflammatory challenge
topic Full Length Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10236189/
https://www.ncbi.nlm.nih.gov/pubmed/37274935
http://dx.doi.org/10.1016/j.bbih.2023.100639
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