Estrogen attenuates physical and psychological stress‐induced cognitive impairments in ovariectomized rats

Autor: Mina Khaleghi, Mohammad Amin Rajizadeh, Hamideh Bashiri, Kristi Anne Kohlmeier, Fatemeh Mohammadi, Mohammad Khaksari, Mohammad Shabani
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Brain and Behavior, Vol 11, Iss 5, Pp n/a-n/a (2021)
Druh dokumentu: article
ISSN: 2162-3279
DOI: 10.1002/brb3.2139
Popis: Abstract Introduction Women are more vulnerable to stress‐related disorders than men, which is counterintuitive as female sex hormones, especially estrogen, have been shown to be protective against stress disorders. Methods In this study, we investigated whether two different models of stress act differently on ovariectomized (OVX) rats and the impact of estrogen on physical or psychological stress‐induced impairments in cognitive‐behaviors. Adult female Wistar rats at 21–22 weeks of age were utilized for this investigation. Sham and OVX rats were subjected to physical and psychological stress for 1 hr/day for 7 days, and cognitive performance was assessed using morris water maze (MWM) and passive avoidance (PA) tests. The open field and elevated plus maze tests (EPM) evaluated exploratory and anxiety‐like behaviors. Results In sham and OVX rats, both physical and psychological stressors were associated with an increase in EPM‐determined anxiety‐like behavior. OVX rats exhibited decreased explorative behavior in comparison with nonstressed sham rats (p
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