NDLI: Endocannabinoid Signaling in Hypothalamic-Pituitary-Adrenocortical Axis Recovery Following Stress: Effects of Indirect Agonists and Comparison of Male and Female Mice

Content Provider	PubMed Central
Author	Roberts, Christopher J. Stuhr, Kara L. Hutz, Michael J. Raff, Hershel Hillard, Cecilia J.
Copyright Year	2013
Abstract	Studies in male rodents have shown that stress-induced increases in circulating corticosterone are increased by both CB1 receptor (CB1R) antagonist treatment and genetic deletion. The purposes of the current study were to determine whether female mice respond in the same manner as males, and whether indirect CB1R agonists accelerate the return of corticosterone to baseline. In agreement with earlier studies, CB1R null and rimonabant-treated male mice had significantly increased circulating corticosterone 30 minutes following the end of a restraint episode compared to wild type and vehicle-treated, respectively. Females treated with rimonabant had significantly higher circulating corticosterone compared to vehicle. However, corticosterone concentrations were not different between CB1R null and wild type females at 30 minutes recovery, although CB1R null mice had higher corticosterone concentrations at 90 minutes of recovery. Female CB1R null mice exhibited greater serum binding capacity for corticosterone than wild type. The monoacylglycerol lipase inhibitor, JZL184, attenuated corticosterone concentrations at restraint offset in male, and at 30 minutes recovery in female mice compared to vehicle. Male mice treated with JZL184 exhibited greater concentrations of circulating corticosterone at 120 minutes recovery, even in the absence of restraint. JZL184 had no effect on corticosterone concentrations in CB1R null mice. The fatty acid amide hydrolase inhibitor, URB597, did not affect corticosterone responses to restraint in male or female, wild type or CB1R null mice. These data suggest that 2-arachidonoylglycerol is the primary endocannabinoid involved in CB1R regulation of the recovery of the HPA axis from restraint stress. These data support a role for endocannabinoid-CB1R signaling in the regulation of the corticosterone response to restraint stress and suggest that female mice with life-long loss of the CB1R undergo compensatory changes that minimize the impact of loss of endocannabinoid signaling on circulating corticosterone.
Related Links	http://dx.doi.org/10.1016/j.pbb.2013.11.026
Ending Page	24
Page Count	8
Starting Page	17
File Format	PDF
ISSN	00913057
e-ISSN	18735177
Journal	Pharmacology, biochemistry, and behavior
Volume Number	117
Language	English
Publisher Date	2014-02-01
Access Restriction	Open
Subject Keyword	Toxicology Clinical Biochemistry Biochemistry Biological Psychiatry Behavioral Neuroscience Pharmacology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Biological Psychiatry Behavioral Neuroscience Biochemistry Clinical Biochemistry Toxicology Pharmacology

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Endocannabinoid Signaling in Hypothalamic-Pituitary-Adrenocortical Axis Recovery Following Stress: Effects of Indirect Agonists and Comparison of Male and Female Mice

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