Therapeutic Potential of Inhibitors of Endocannabinoid Degradation for the Treatment of Stress-Related Hyperalgesia in an Animal Model of Chronic Pain
| Autor: | Ermelinda Lomazzo, Ulrich Hoheisel, Laura Bindila, Beat Lutz, Claudia Schwitter, Floor Remmers, Raissa Lerner |
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| Rok vydání: | 2014 |
| Předmět: |
Male
Anxiety Pharmacology Amidohydrolases chemistry.chemical_compound Piperidines Fatty acid amide hydrolase Nerve Growth Factor Animals Medicine Chronic stress Benzodioxoles Enzyme Inhibitors JZL184 Depression business.industry Uncertainty Chronic pain Brain Analgesics Non-Narcotic URB597 medicine.disease Endocannabinoid system Monoacylglycerol Lipases Mice Inbred C57BL Disease Models Animal Psychiatry and Mental health Nociception chemistry Hyperalgesia Anesthesia Benzamides Original Article Carbamates Chronic Pain medicine.symptom business Stress Psychological Endocannabinoids |
| Zdroj: | Neuropsychopharmacology. 40:488-501 |
| ISSN: | 1740-634X 0893-133X |
| DOI: | 10.1038/npp.2014.198 |
| Popis: | The occurrence of chronic stress, depression, and anxiety can increase nociception in humans and may facilitate the transition from localized to chronic widespread pain. The mechanisms underlying chronic widespread pain are still unknown, hindering the development of effective pharmacological therapies. Here, we exposed C57BL/6J mice to chronic unpredictable stress (CUS) to investigate how persistent stress affects nociception. Next, mice were treated with multiple intramuscular nerve growth factor (NGF) injections, which induced chronic widespread nociception. Thus, combination of CUS and NGF served as a model where psychophysiological impairment coexists with long-lasting hyperalgesia. We found that CUS increased anxiety- and depression-like behavior and enhanced basal nociception in mice. When co-applied with repeated NGF injections, CUS elicited a sustained long-lasting widespread hyperalgesia. In order to evaluate a potential therapeutic strategy for the treatment of chronic pain associated with stress, we hypothesized that the endocannabinoid system (ECS) may represent a target signaling system. We found that URB597, an inhibitor of the anandamide-degrading enzyme fatty acid amide hydrolase (FAAH), and JZL184, an inhibitor of the 2-arachidonoyl glycerol-degrading enzyme monoacylglycerol lipase (MAGL), increased eCB levels in the brain and periphery and were both effective in reducing CUS-induced anxiety measured by the light–dark test and CUS-induced thermal hyperalgesia. Remarkably, the long-lasting widespread hyperalgesia induced by combining CUS and NGF was effectively reduced by URB597, but not by JZL184. Simultaneous inhibition of FAAH and MAGL did not improve the overall therapeutic response. Therefore, our findings indicate that enhancement of anandamide signaling with URB597 is a promising pharmacological approach for the alleviation of chronic widespread nociception in stress-exposed mice, and thus, it could represent a potential treatment strategy for chronic pain associated with neuropsychiatric disorders in humans. |
| Databáze: | OpenAIRE |
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