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Neddenriep B, Bagdas D, Contreras KM, Ditre JW, Wolstenholme JT, Miles MF, Damaj MI. Pharmacological mechanisms of alcohol analgesic-like properties in mouse models of acute and chronic pain. Neuropharmacology 2019; 160:107793. [PMID: 31562845 DOI: 10.1016/j.neuropharm.2019.107793] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/17/2019] [Accepted: 09/22/2019] [Indexed: 12/16/2022]
Abstract
Alcohol use and chronic pain are highly comorbid. Acute alcohol use typically produces an analgesic effect. However, chronic use can worsen the progression of chronic pain. In rodent models, acute models of pain have primarily been used to investigate the relationship between alcohol and pain analgesia. Here, we use two models of chronic pain, chronic inflammatory and peripheral neuropathic pain, to investigate acute alcohol's antinociceptive and analgesic properties. We hypothesize that acute ethanol is acting through opioid receptors to create an analgesic-like effect in both reflexive and affective dimensions of pain. Using male and female C57BL/6J mice, oral ethanol administration (0-1.25 g/kg) showed a dose-dependent reversal of mechanical hypersensitivity in both Complete Freund's Adjuvant (CFA) and chronic constriction injury (CCI) models of chronic inflammatory and neuropathic pain. No sex differences were observed. Using the conditioned place preference (CPP) task to assess the subjective responses to ethanol's anti-nociceptive properties, CCI-injured animals showed a preference for the ethanol-paired side, suggesting a reduction in an aversive and pain-like state produced by nerve injury. These effects are likely mediated through the kappa and possibly the mu opioid systems, since ethanol-induced anti-nociception following CCI was fully reversed by pretreatment with the kappa selective antagonist, nor-BNI, or high doses of naltrexone. These data show that ethanol possesses analgesic-like properties in chronic inflammatory and neuropathic pain models in mice and provide new insight into ethanol as it relates to chronic pain.
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Affiliation(s)
- Bradley Neddenriep
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA; Translational Research Initiative for Pain and Neuropathy, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA
| | - Deniz Bagdas
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA; Translational Research Initiative for Pain and Neuropathy, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA
| | - Katherine M Contreras
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA; Translational Research Initiative for Pain and Neuropathy, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA
| | - Joseph W Ditre
- Department of Psychology, Syracuse University, Syracuse, NY, USA
| | - Jennifer T Wolstenholme
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA; VCU-Alcohol Research Center, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA
| | - Michael F Miles
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA; VCU-Alcohol Research Center, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA
| | - M Imad Damaj
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA; Translational Research Initiative for Pain and Neuropathy, Virginia Commonwealth University, Virginia Commonwealth University, Richmond, VA, 23298-0613, USA.
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Butler RK, Finn DP. Stress-induced analgesia. Prog Neurobiol 2009; 88:184-202. [PMID: 19393288 DOI: 10.1016/j.pneurobio.2009.04.003] [Citation(s) in RCA: 433] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Revised: 03/15/2009] [Accepted: 04/15/2009] [Indexed: 12/21/2022]
Abstract
For over 30 years, scientists have been investigating the phenomenon of pain suppression upon exposure to unconditioned or conditioned stressful stimuli, commonly known as stress-induced analgesia. These studies have revealed that individual sensitivity to stress-induced analgesia can vary greatly and that this sensitivity is coupled to many different phenotypes including the degree of opioid sensitivity and startle response. Furthermore, stress-induced analgesia is influenced by age, gender, and prior experience to stressful, painful, or other environmental stimuli. Stress-induced analgesia is mediated by activation of the descending inhibitory pain pathway. Pharmacological and neurochemical studies have demonstrated involvement of a large number of neurotransmitters and neuropeptides. In particular, there are key roles for the endogenous opioid, monoamine, cannabinoid, gamma-aminobutyric acid and glutamate systems. The study of stress-induced analgesia has enhanced our understanding of the fundamental physiology of pain and stress and can be a useful approach for uncovering new therapeutic targets for the treatment of pain and stress-related disorders.
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Affiliation(s)
- Ryan K Butler
- Department of Pharmacology and Therapeutics, NCBES Neuroscience Cluster and Centre for Pain Research, National University of Ireland, Galway, University Road, Galway, Ireland
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Kenunen OG, Prakh'e IV, Kozlovskii VL. Changes in anxiety levels are followed by changes in behavioral strategy in mice subjected to stress and in the extent of stress-induced analgesia. ACTA ACUST UNITED AC 2006; 36:151-6. [PMID: 16380828 DOI: 10.1007/s11055-005-0173-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Revised: 07/26/2004] [Indexed: 10/25/2022]
Abstract
The experiments reported here demonstrated that corasol increased the extent of analgesia induced by stress and decreased the duration of immobility in mice in a forced swimming test in cold water. Administration of diazepam led to the opposite changes and counteracted the actions of the anxiogen. The effects of the anxiolytic were more apparent in NMRI than mongrel mice, while in mongrel mice the effects of the anxiogen were more marked. Changes in measures following administration of agents were reciprocal in nature. These results lead to the conclusion that that these changes are determined by the level of anxiety, and that the strain differences between mongrel and NMRI mice are also linked with this factor.
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Affiliation(s)
- O G Kenunen
- V. M. Bekhterev Science Research Institute of Psychoneurology, 3 Bekhterev Street, 193019 St. Petersburg, Russia
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Brennan FX, Stromberg MF. Ethanol consumption improves avoidance learning in rats: role of deprivation interval. Alcohol 2004; 34:159-64. [PMID: 15902909 DOI: 10.1016/j.alcohol.2004.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Voluntary oral self-administration of ethanol in rats has been used to model ethanol consumption and abuse in human beings, with contradictory results. The purpose of the current study was to assess the effect of voluntary ethanol consumption on acquisition of a lever press escape/avoidance task in rats. Male Wistar rats were exposed to ethanol in a limited-access procedure, and either 1 day or 10 days after their last ethanol exposure, animals received a 4-h lever press escape/avoidance session. Control animals were not exposed to ethanol at any time. Animals in the 1-day ethanol-deprivation group performed significantly better than did the other two groups with respect to avoidance responding. There were no group differences in number of lever presses during a safety period, a measure of anxiety. Further, we obtained a significant negative correlation between behavioral performance and change in ethanol consumption after the escape/avoidance session, as well as a significant positive correlation between baseline ethanol consumption and avoidance performance. Results are discussed in terms of the potential neural mediators of the improved avoidance effect in animals in the 1-day ethanol-deprivation group.
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Affiliation(s)
- Francis X Brennan
- Medical Research Service (151), Philadelphia VA Medical Center, 3900 Woodland Avenue, Philadelphia, PA 19104, USA.
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Abstract
This paper is the twenty-first installment of our annual review of research concerning the opiate system. It summarizes papers published during 1998 that studied the behavioral effects of the opiate peptides and antagonists, excluding the purely analgesic effects, although stress-induced analgesia is included. The specific topics covered this year include stress; tolerance and dependence; eating and drinking; alcohol; gastrointestinal, renal, and hepatic function; mental illness and mood; learning, memory, and reward; cardiovascular responses; respiration and thermoregulation; seizures and other neurologic disorders; electrical-related activity; general activity and locomotion; sex, pregnancy, and development; immunologic responses; and other behaviors.
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Affiliation(s)
- A L Vaccarino
- Department of Psychology, University of New Orleans, LA 70148, USA.
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