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- W2008616860 abstract "Parallel lines of research suggest that dysfunction affecting both corticotropin-releasing factor (CRF) and serotonin (5-HT) systems is involved in the pathophysiology of psychiatric illnesses such as anxiety and depression. The effect of CRF on behavior and on the accompanying change in activity of 5-HT neurons in the dorsal and median raphe nuclei (DR and MR) that project to the ventral medial prefrontal cortex (mPFC), a brain area implicated in mood and anxiety disorders, was studied.Male Sprague-Dawley rats with intra-mPFC deposits of fluorescent microspheres received injections of CRF (1 microg, intracerebroventricular [i.c.v.]) and were tested for CRF-enhanced startle, a behavioral assay believed to reflect stress- or anxiety-like states. C-Fos immunohistochemistry was used to measure CRF-induced activity in retrogradely labeled neurons in the DR and MR and correlate this level of activity with the level of CRF-enhanced startle.The CRF-enhanced startle was accompanied by an increased c-Fos expression in retrogradely labeled cells in the raphe. In the DR and MR, there was a clear topography of activation, with a higher-percent activation in retrogradely labeled neurons in caudal sections. In the caudal DR, this effect was positively correlated with the level of CRF-enhanced startle. Co-expression of retrogradely labeled cells with tryptophan hydroxylase showed that the majority (> 90%) of raphe efferents to the mPFC were from serotonergic neurons.These data indicate that CRF activates a subpopulation of cortical-projecting 5-HT raphe neurons and suggest that increased 5-HT release in the mPFC might be an important component driving some types of anxiety-like behaviors." @default.
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- W2008616860 date "2008-05-01" @default.
- W2008616860 modified "2023-10-16" @default.
- W2008616860 title "Activation of Raphe Efferents to the Medial Prefrontal Cortex by Corticotropin-Releasing Factor: Correlation with Anxiety-Like Behavior" @default.
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- W2008616860 doi "https://doi.org/10.1016/j.biopsych.2007.10.016" @default.
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