TY - JOUR T1 - Corticotropin-Releasing Hormone Drives Anandamide Hydrolysis in the Amygdala to Promote Anxiety JF - The Journal of Neuroscience JO - J. Neurosci. SP - 3879 LP - 3892 DO - 10.1523/JNEUROSCI.2737-14.2015 VL - 35 IS - 9 AU - J. Megan Gray AU - Haley A. Vecchiarelli AU - Maria Morena AU - Tiffany T.Y. Lee AU - Daniel J. Hermanson AU - Alexander B. Kim AU - Ryan J. McLaughlin AU - Kowther I. Hassan AU - Claudia Kühne AU - Carsten T. Wotjak AU - Jan M. Deussing AU - Sachin Patel AU - Matthew N. Hill Y1 - 2015/03/04 UR - http://www.jneurosci.org/content/35/9/3879.abstract N2 - Corticotropin-releasing hormone (CRH) is a central integrator in the brain of endocrine and behavioral stress responses, whereas activation of the endocannabinoid CB1 receptor suppresses these responses. Although these systems regulate overlapping functions, few studies have investigated whether these systems interact. Here we demonstrate a novel mechanism of CRH-induced anxiety that relies on modulation of endocannabinoids. Specifically, we found that CRH, through activation of the CRH receptor type 1 (CRHR1), evokes a rapid induction of the enzyme fatty acid amide hydrolase (FAAH), which causes a reduction in the endocannabinoid anandamide (AEA), within the amygdala. Similarly, the ability of acute stress to modulate amygdala FAAH and AEA in both rats and mice is also mediated through CRHR1 activation. This interaction occurs specifically in amygdala pyramidal neurons and represents a novel mechanism of endocannabinoid–CRH interactions in regulating amygdala output. Functionally, we found that CRH signaling in the amygdala promotes an anxious phenotype that is prevented by FAAH inhibition. Together, this work suggests that rapid reductions in amygdala AEA signaling following stress may prime the amygdala and facilitate the generation of downstream stress-linked behaviors. Given that endocannabinoid signaling is thought to exert “tonic” regulation on stress and anxiety responses, these data suggest that CRH signaling coordinates a disruption of tonic AEA activity to promote a state of anxiety, which in turn may represent an endogenous mechanism by which stress enhances anxiety. These data suggest that FAAH inhibitors may represent a novel class of anxiolytics that specifically target stress-induced anxiety. ER -