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- W2891159424 abstract "The aim of this study was to examine the effects of non-peptide corticotropin-releasing factor receptor 1 (CRF1) antagonist (antalarmin) administration on rat conditioned fear responses and gamma-aminobutyric acid (GABA)-ergic brain activity (GAD67 expression and GABA concentration) in low-anxiety (LR) and high-anxiety (HR) rats. The animals were divided into the LR and HR groups based on the duration of their conditioned freezing response in the first contextual fear test. After 28 days, the animals were re-subjected to the contextual fear training and test. The rats received an antalarmin injection (10 mg/kg or 20 mg/kg) 80 min before the second exposure to the aversive context. Antalarmin significantly attenuated the conditioned fear response only in the HR rats. The behavioral effect of a lower dose (10 mg/kg) of antalarmin was accompanied by increased GAD67 expression in the prelimbic cortex (PL) and central nucleus of the amygdala (CeA) and an increased GABA concentration in the amygdala. These studies showed that HR rats were more susceptible to the anxiolytic effects of CRF1 antagonist administration, which were associated with increased GABAergic activity in the medial prefrontal cortex and amygdala. The current data may provide insights into the neurobiological mechanism operating within the mesolimbic CRF-GABA neurotransmitter systems, which may be responsible for individual differences in stress-related diseases. This knowledge can be applied to further elucidate the pathophysiology of anxiety and trauma/stress-related disorders." @default.
- W2891159424 created "2018-09-27" @default.
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- W2891159424 date "2017-02-01" @default.
- W2891159424 modified "2023-10-13" @default.
- W2891159424 title "Corticotropin releasing factor receptor 1 antagonist differentially inhibits freezing behavior and changes gamma-aminobutyric acidergic activity in the amygdala in low- and high-anxiety rats." @default.
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