Psychosocial stress is a major risk factor for the precipitation and exacerbation of mental illness in susceptible individuals. Understanding the neuroadaptations induced by chronic stress could afford new opportunities for therapeutic intervention for stress-related psychiatric disorders. The candidate has shown that levels of the endocannabinoid 2-arachidonoylglycerol (2-AG) exhibit a progressive increase in response to repeated stress exposure in limbic brain regions including the amygdala, and that this increase contributes stress-response habituation.
In aim 1 of this proposal the candidate will determine the temporal dynamics of the 2-AG response to stress and the molecular mechanisms subserving these effects. The candidate will test the hypothesis that the stress hormone corticosterone is required for the adaptations in endogenous cannabinoid signaling to occur in response to repeated stress exposure. Although stress increases 2-AG in the amygdala, it is not known if this increase is associated with enhanced endocannabinoid-mediated synaptic signaling.
In aim 2 the candidate will test the hypothesis that this stress-induced increase in 2-AG in the amygdala is associated with enhanced capacity of amygdala neurons to participate in endocannabinoid-mediated synaptic signaling. Finally, in aim 3, the candidate will test the hypothesis that stress-induced increases in 2-AG levels contribute to the behavioral dysregulation induced by chronic stress. Elucidating the stress-induced adaptations in endocannabinoids signaling could provide novel molecular targets for drug development for the treatment of affective disorders.
Psychosocial stress is major risk factor for development and exacerbation of many forms of metal illness including mood disorders, anxiety disorder, schizophrenia, and substance dependence. Understanding the brain's adaptive response to stress could uncover novel therapeutic approaches to treat these disorders. Determining the adaptations in the endogenous cannabinoid system in response to stress could provide a novel array of endocannabinoid-based molecular targets for drug discovery for the treatment and prevention of a broad spectrum of mental illnesses affected by psychosocial stress.
|Gunduz-Cinar, Ozge; Flynn, Shaun; Brockway, Emma et al. (2016) Fluoxetine Facilitates Fear Extinction Through Amygdala Endocannabinoids. Neuropsychopharmacology 41:1598-609|
|Hartley, N D; Gunduz-Cinar, O; Halladay, L et al. (2016) 2-arachidonoylglycerol signaling impairs short-term fear extinction. Transl Psychiatry 6:e749|
|Gamble-George, Joyonna Carrie; Baldi, Rita; Halladay, Lindsay et al. (2016) Cyclooxygenase-2 inhibition reduces stress-induced affective pathology. Elife 5:|
|BÃ¡ldi, Rita; Ghosh, Dipanwita; Grueter, Brad A et al. (2016) Electrophysiological Measurement of Cannabinoid-Mediated Synaptic Modulation in Acute Mouse Brain Slices. Curr Protoc Neurosci 75:6.29.1-6.29.19|
|Gray, J Megan; Wilson, Christopher D; Lee, Tiffany T Y et al. (2016) Sustained glucocorticoid exposure recruits cortico-limbic CRH signaling to modulate endocannabinoid function. Psychoneuroendocrinology 66:151-8|
|Morena, Maria; Patel, Sachin; Bains, Jaideep S et al. (2016) Neurobiological Interactions Between Stress and the Endocannabinoid System. Neuropsychopharmacology 41:80-102|
|Gray, J Megan; Vecchiarelli, Haley A; Morena, Maria et al. (2015) Corticotropin-releasing hormone drives anandamide hydrolysis in the amygdala to promote anxiety. J Neurosci 35:3879-92|
|Shonesy, Brian C; Winder, Danny G; Patel, Sachin et al. (2015) The initiation of synaptic 2-AG mobilization requires both an increased supply of diacylglycerol precursor and increased postsynaptic calcium. Neuropharmacology 91:57-62|
|Brown, J A; Ramikie, T S; Schmidt, M J et al. (2015) Inhibition of parvalbumin-expressing interneurons results in complex behavioral changes. Mol Psychiatry 20:1499-507|
|Bukalo, Olena; Pinard, Courtney R; Silverstein, Shana et al. (2015) Prefrontal inputs to the amygdala instruct fear extinction memory formation. Sci Adv 1:|
Showing the most recent 10 out of 25 publications