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- W2783281721 abstract "Microglia are resident immune cells of the brain that can regulate neural communication and excitability. Any environmental influence on microglial activity has the potential to alter subsequent neural physiology and behavior. Within the prefrontal cortex, several types of stressors have been shown to increase microglial expression of activation markers such as ionized calcium-binding adapter molecule-1 (Iba-1), which suggests altered microglial activity. Recent reports in rodents suggest that exposure to forms of early-life stress such as maternal separation can alter microglial responsivity to subsequent challenges. Several learning paradigms used in rodents require food restriction to provoke motivational states that facilitate approach behaviors. Here, we tested whether food restriction (increasing from 13 g/day–23 g/day in males and 10 g/day–20 g/day in females, which reduced body weight to 72–84% free-fed weight) in adolescent rats is a sufficient challenge to affect microglial Iba-1 expression, and whether previous exposure to postnatal maternal separation influenced microglial outcomes. We measured prefrontal cortex Iba-1 expression and microglial morphology after 20 days of ad libitum or restricted food availability in males and females with or without exposure to maternal separation. Food-restricted animals displayed higher levels of Iba-1 in the prefrontal cortex, with hyper-ramified microglial morphology in maternally separated males and control females, compared to those that were free-fed. Together, our data provide evidence that food restriction paradigms may have unintended effects in some behavioral protocols." @default.
- W2783281721 created "2018-01-26" @default.
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- W2783281721 date "2018-01-08" @default.
- W2783281721 modified "2023-09-27" @default.
- W2783281721 title "Adolescent food restriction in rats alters prefrontal cortex microglia in an experience-dependent manner" @default.
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- W2783281721 doi "https://doi.org/10.1080/10253890.2017.1423054" @default.
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