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Psychogenic stress activates C-Fos in nucleus accumbens-projecting neurons of the hippocampal ventral subiculum

Lipski, WJ and Dibble, SM and Rinaman, L and Grace, AA (2017) Psychogenic stress activates C-Fos in nucleus accumbens-projecting neurons of the hippocampal ventral subiculum. International Journal of Neuropsychopharmacology, 20 (10). 855 - 860. ISSN 1461-1457

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Abstract

© The Author 2017. Background: The ventral subiculum is known to be activated by the presentation of novel stressors. It has been hypothesized that neuronal ensembles at the ventral aspect of the hippocampal formation are involved in context-dependent processing and can guide the learning of appropriate action selections in response to threatening contexts. Artificial activation of the ventral subiculum can excite medium spiny neurons of the nucleus accumbens and can increase the excitability of mesolimbic dopamine neurons via a polysynaptic pathway through the basal ganglia. However, it remains unknown whether this circuit can be activated by aversive experience, and if so, whether ventral subiculum engages nucleus accumbens monosynaptically. Methods: To address this, the retrograde tracer fluorogold was used in rats to label neurons projecting to the caudomedial nucleus accumbens. One to 2 weeks later, the same rats were exposed to psychogenic stress (i.e., acute restraint in a novel test room) or served as nonhandled controls, followed by dual immunocytochemical localization of retrogradely transported tracer and nuclear Fos. Results: Compared with controls, rats exposed to psychogenic stress displayed more fluorogold-positive ventral subiculum neurons that were double-labeled for Fos. Conclusion: This study establishes that the direct pathway from ventral subiculum to the caudomedial nucleus accumbens is activated by stressful experience.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Lipski, WJ
Dibble, SM
Rinaman, Lrinaman@pitt.eduRINAMAN
Grace, AAgraceaa@pitt.eduGRACEAA
Date: 1 October 2017
Date Type: Publication
Journal or Publication Title: International Journal of Neuropsychopharmacology
Volume: 20
Number: 10
Page Range: 855 - 860
DOI or Unique Handle: 10.1093/ijnp/pyx054
Schools and Programs: Dietrich School of Arts and Sciences > Neuroscience
Refereed: Yes
ISSN: 1461-1457
Date Deposited: 03 Jul 2017 18:52
Last Modified: 23 Jan 2019 03:55
URI: http://d-scholarship.pitt.edu/id/eprint/32690

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