scholarly journals Prefrontal/Amygdalar System Determines Stress Coping Behavior Through 5-HT/GABA Connection

2013 ◽  
Vol 38 (10) ◽  
pp. 2057-2067 ◽  
Author(s):  
Diego Andolina ◽  
Dario Maran ◽  
Alessandro Valzania ◽  
David Conversi ◽  
Stefano Puglisi-Allegra
Keyword(s):  
Coping Behavior ◽  
Stress Coping

scholarly journals A stress-coping model of mental illness stigma: II. Emotional stress responses, coping behavior and outcome

2009 ◽  
Vol 110 (1-3) ◽  
pp. 65-71 ◽  
Author(s):  
Nicolas Rüsch ◽  
Patrick W. Corrigan ◽  
Karina Powell ◽  
Anita Rajah ◽  
Manfred Olschewski ◽  
...  
Keyword(s):  
Mental Illness ◽  
Emotional Stress ◽  
Stress Responses ◽  
Coping Behavior ◽  
Mental Illness Stigma ◽  
Stress Coping ◽  
Coping Model

Convergence of clinically relevant manipulations on dopamine-regulated prefrontal activity underlying stress-coping responses

2021 ◽  
Author(s):  
Scott A. Wilke ◽  
Karen Lavi ◽  
Sujin Byeon ◽  
Vikaas S. Sohal
Keyword(s):  
Prefrontal Cortex ◽  
Coping Behavior ◽  
Brain Slices ◽  
Stress Coping ◽  
Coping Responses ◽  
Genetic Manipulations ◽  
Correlated Activity ◽  
Susceptibility Model ◽  
Dopamine Signaling ◽  
Network States

ABSTRACTBackgroundDepression is a pleiotropic condition that can be produced or ameliorated by diverse genetic, environmental, and pharmacological manipulations. In this context, identifying patterns of circuit activity on which many of these manipulations converge would be important, because studying these patterns could reveal underlying biological processes related to depression and/or new therapies. In particular, the prefrontal cortex and dopaminergic signaling have both been implicated in depression. Nevertheless, how dopamine influences disease-relevant patterns of prefrontal circuit activity remains unknown.MethodsWe used calcium imaging in brain slices to identify depression-relevant patterns of activity in prefrontal microcircuits, and measure how these are modulated by dopamine D2 receptors (D2Rs). Then, we used optogenetic and genetic manipulations to test how dopamine and D2Rs contribute to stress-coping behavior in a paradigm commonly used to assay how manipulations promote or ameliorate depression-like states.ResultsPatterns of correlated activity in prefrontal microcircuits are enhanced by D2R stimulation as well as by two mechanistically distinct antidepressants: ketamine and fluoxetine. Conversely, this D2R-driven effect was disrupted in two etiologically distinct models of depression: a genetic susceptibility model and chronic social defeat. Phasic stimulation of dopamine afferents to prefrontal cortex increased effortful responses to tail suspension stress. Conversely, deleting prefrontal D2R receptors reduced the duration of individual struggling episodes.ConclusionsCorrelated prefrontal microcircuit activity represents a point of convergence for multiple depression-related manipulations. Prefrontal D2Rs enhance this activity. Through this mechanism, prefrontal dopamine signaling may promote network states associated with antidepressant actions that manifest as effortful responses to stress.

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