| Home > Articles > Published articles > Prenatal immune activation in rats and adult exposure to inescapable shocks reveal sex-dependent effects on fear conditioning that might be relevant for schizophrenia |
| Date: | 2024 |
| Abstract: | Prenatal infection is considered a relevant factor for neurodevelopmental alterations and psychiatric diseases. Administration of bacterial and viral components during pregnancy in rodents results in maternal immune activation (MIA), leading to schizophrenia-like neurochemical and behavioral changes. Despite some evidence for abnormal fear conditioning in schizophrenia, only a few animal studies have focused on this issue. Therefore, we addressed the impact of the administration of the viral mimetic polyI:C to pregnant Long-Evans rats on the adult offspring response to inescapable shocks (IS) and contextual fear conditioning. In males, polyI:C induced a greater endocrine (plasma ACTH) response to IS and both polyI:C and IS enhanced fear conditioning and generalization to a completely different novel environment (hole-board), with no additive effects, probably due to a ceiling effect. In contrast, a modest impact of polyI:C and a lower impact of IS on contextual fear conditioning and generalization was observed in females. Thus, the present results demonstrate that polyI:C dramatically affected fear response to IS in adult males and support the hypothesis that males are more sensitive than females to this treatment. This model might allow to explore neurobiological mechanisms underlying abnormal responsiveness to fear conditioning and stressors in schizophrenia. |
| Grants: | Instituto de Salud Carlos III AC19/00129 Agencia Estatal de Investigación PID2020-118844RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00158 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00789 Ministerio de Ciencia e Innovación RED2022-134191-T |
| Note: | Altres ajuts: acords transformatius de la UAB |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | PolyI:C ; Maternal immune activation ; ACTH ; Corticosterone ; Footshock ; Contextual fear ; Fear generalization |
| Published in: | Psychiatry research, Vol. 342 (december 2024) , ISSN 1872-7123 |
10 p, 1.5 MB |