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Chen Y, Yan P, Wei S, Zhu Y, Lai J, Zhou Q. Ketamine metabolite alleviates morphine withdrawal-induced anxiety via modulating nucleus accumbens parvalbumin neurons in male mice. Neurobiol Dis 2023; 186:106279. [PMID: 37661023 DOI: 10.1016/j.nbd.2023.106279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/20/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023] Open
Abstract
Opioid withdrawal generates extremely unpleasant physical symptoms and negative affective states. A rapid relief of opioid withdrawal-induced anxiety has obvious clinical relevance but has been rarely reported. We have shown that injection of ketamine metabolite (2R,6R)-hydroxynorketamine (HNK) leads to a rapid alleviation of anxiety-like behaviors in male mice undergoing chronic morphine withdrawal. Here we investigated the contribution of nucleus accumbens shell (sNAc) parvalbumin (PV)-neurons to this process. Chronic morphine withdrawal was associated with higher intrinsic excitability of sNAc PV-neurons via reduced voltage-dependent potassium currents. Chemogenetic inhibition of sNAc PV-neurons reversed the enhanced excitability of PV-neurons and anxiety-like behaviors in these morphine withdrawal male mice, while activation of sNAc PV-neurons induced anxiety-like behaviors in naive male mice. (2R,6R)-HNK reversed the altered potassium currents and intrinsic excitability of sNAc PV-neurons. Our findings demonstrate an important contribution of sNAc PV-neurons to modulating morphine withdrawal-induced anxiety-like behaviors and rapid relief of anxiety-like behaviors by (2R,6R)-HNK, this newly identified target may have therapeutic potentials in treating opioid addiction and anxiety disorders.
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Affiliation(s)
- Yuanyuan Chen
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, China; School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Peng Yan
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, China
| | - Shuguang Wei
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, China
| | - Yongsheng Zhu
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, China
| | - Jianghua Lai
- College of Forensic Science, Xi'an Jiaotong University, Xi'an, China.
| | - Qiang Zhou
- School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China.
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Ozdemir D, Allain F, Kieffer BL, Darcq E. Advances in the characterization of negative affect caused by acute and protracted opioid withdrawal using animal models. Neuropharmacology 2023; 232:109524. [PMID: 37003572 PMCID: PMC10844657 DOI: 10.1016/j.neuropharm.2023.109524] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 03/03/2023] [Accepted: 03/23/2023] [Indexed: 04/03/2023]
Abstract
Opioid use disorder (OUD) is a chronic brain disease which originates from long-term neuroadaptations that develop after repeated opioid consumption and withdrawal episodes. These neuroadaptations lead among other things to the development of a negative affect, which includes loss of motivation for natural rewards, higher anxiety, social deficits, heightened stress reactivity, an inability to identify and describe emotions, physical and/or emotional pain, malaise, dysphoria, sleep disorders and chronic irritability. The urge for relief from this negative affect is one of major causes of relapse, and thus represents a critical challenge for treatment and relapse prevention. Animal models of negative affect induced by opioid withdrawal have recapitulated the development of a negative emotional state with signs such as anhedonia, increased anxiety responses, increased despair-like behaviour and deficits in social interaction. This research has been critical to determine neurocircuitry adaptations during chronic opioid administration or upon withdrawal. In this review, we summarize the recent literature of rodent models of (i) acute withdrawal, (ii) protracted abstinence from passive administration of opioids, (iii) withdrawal or protracted abstinence from opioid self-administration. Finally, we describe neurocircuitry involved in acute withdrawal and protracted abstinence. This article is part of the Special Issue on "Opioid-induced changes in addiction and pain circuits".
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Affiliation(s)
- Dersu Ozdemir
- INSERM U1114, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, France
| | - Florence Allain
- INSERM U1114, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, France
| | - Brigitte L Kieffer
- INSERM U1114, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, France
| | - Emmanuel Darcq
- INSERM U1114, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, France.
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3
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Galasso L, Cappella A, Mulè A, Castelli L, Ciorciari A, Stacchiotti A, Montaruli A. Polyamines and Physical Activity in Musculoskeletal Diseases: A Potential Therapeutic Challenge. Int J Mol Sci 2023; 24:9798. [PMID: 37372945 DOI: 10.3390/ijms24129798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/02/2023] [Accepted: 06/04/2023] [Indexed: 06/29/2023] Open
Abstract
Autophagy dysregulation is commonplace in the pathogenesis of several invalidating diseases, such as musculoskeletal diseases. Polyamines, as spermidine and spermine, are small aliphatic cations essential for cell growth and differentiation, with multiple antioxidant, anti-inflammatory, and anti-apoptotic effects. Remarkably, they are emerging as natural autophagy regulators with strong anti-aging effects. Polyamine levels were significantly altered in the skeletal muscles of aged animals. Therefore, supplementation of spermine and spermidine may be important to prevent or treat muscle atrophy. Recent in vitro and in vivo experimental studies indicate that spermidine reverses dysfunctional autophagy and stimulates mitophagy in muscles and heart, preventing senescence. Physical exercise, as polyamines, regulates skeletal muscle mass inducing proper autophagy and mitophagy. This narrative review focuses on the latest evidence regarding the efficacy of polyamines and exercise as autophagy inducers, alone or coupled, in alleviating sarcopenia and aging-dependent musculoskeletal diseases. A comprehensive description of overall autophagic steps in muscle, polyamine metabolic pathways, and effects of the role of autophagy inducers played by both polyamines and exercise has been presented. Although literature shows few data in regard to this controversial topic, interesting effects on muscle atrophy in murine models have emerged when the two "autophagy-inducers" were combined. We hope these findings, with caution, can encourage researchers to continue investigating in this direction. In particular, if these novel insights could be confirmed in further in vivo and clinical studies, and the two synergic treatments could be optimized in terms of dose and duration, then polyamine supplementation and physical exercise might have a clinical potential in sarcopenia, and more importantly, implications for a healthy lifestyle in the elderly population.
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Affiliation(s)
- Letizia Galasso
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
| | - Annalisa Cappella
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
- U.O. Laboratorio di Morfologia Umana Applicata, I.R.C.C.S. Policlinico San Donato, San Donato Milanese, 20097 Milan, Italy
| | - Antonino Mulè
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
| | - Lucia Castelli
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
| | - Andrea Ciorciari
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
| | - Alessandra Stacchiotti
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
- U.O. Laboratorio di Morfologia Umana Applicata, I.R.C.C.S. Policlinico San Donato, San Donato Milanese, 20097 Milan, Italy
| | - Angela Montaruli
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy
- I.R.C.C.S. Ospedale Galeazzi-Sant'Ambrogio, 20157 Milan, Italy
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Laboureyras E, Boujema MB, Mauborgne A, Simmers J, Pohl M, Simonnet G. Fentanyl-induced hyperalgesia and analgesic tolerance in male rats: common underlying mechanisms and prevention by a polyamine deficient diet. Neuropsychopharmacology 2022; 47:599-608. [PMID: 34621016 PMCID: PMC8674360 DOI: 10.1038/s41386-021-01200-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/20/2021] [Accepted: 09/24/2021] [Indexed: 01/03/2023]
Abstract
Opioids are a mainstay of pain management but can induce unwanted effects, including analgesic tolerance and paradoxical hyperalgesia, either of which leads to increased pain. Clinically, however, the relationship between these two phenomena remains elusive. By evaluating changes in mechanical nociceptive threshold in male rats, we found that in contrast to a purely analgesic control response to a single subcutaneous administration of fentanyl (25 μg/kg), in rats subjected to inflammatory pain 2 weeks previously (Day0), the same test dose (D13) induced a bi-phasic response: initial decreased analgesia (tolerance) followed by hyperalgesia lasting several hours. Both the tolerance and hyperalgesia were further enhanced in rats that had additionally received fentanyl on D0. The dose-response profiles (5 fg to 50 μg/kg) of pain- and opioid-experienced rats were very different from pain/drug-naive rats. At ultra-low fentanyl doses (<5 ng/kg and <500 ng/kg for naïve control and pain/drug-experienced rats, respectively), solely hyperalgesia was observed in all cases. At higher doses, which now produced analgesia alone in naive rats, reduced analgesia (tolerance) coupled with hyperalgesia occurred in pain/fentanyl-experienced rats, with both phases increasing with dose. Transcriptomic and pharmacological data revealed that an overactivation of the spinal N-methyl-D-aspartate receptor-inducible NO synthase cascade plays a critical role in both acute tolerance and hyperalgesia, and together with the finding that the magnitudes of analgesia and associated hyperalgesia are negatively correlated, is indicative of closely related phenomena. Finally, a polyamine deficient diet prevented inducible NO synthase transcript upregulation, restored fentanyl's analgesic efficacy and suppressed the emergence of hyperalgesia.
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Affiliation(s)
- Emilie Laboureyras
- grid.462004.40000 0004 0383 7404Univ. de Bordeaux, INCIA, 33076 Bordeaux, France ,grid.462004.40000 0004 0383 7404CNRS, INCIA, UMR 5287, 33076 Bordeaux, France
| | - Meric Ben Boujema
- grid.462004.40000 0004 0383 7404Univ. de Bordeaux, INCIA, 33076 Bordeaux, France ,grid.462004.40000 0004 0383 7404CNRS, INCIA, UMR 5287, 33076 Bordeaux, France
| | - Annie Mauborgne
- grid.462844.80000 0001 2308 1657Univ. Pierre et Marie Curie, INSERM UMRS 975, 75013 Paris, France
| | - John Simmers
- grid.462004.40000 0004 0383 7404Univ. de Bordeaux, INCIA, 33076 Bordeaux, France ,grid.462004.40000 0004 0383 7404CNRS, INCIA, UMR 5287, 33076 Bordeaux, France
| | - Michel Pohl
- grid.508487.60000 0004 7885 7602Univ. Paris Descartes, INSERM UMR 894, 75014 Paris, France
| | - Guy Simonnet
- Univ. de Bordeaux, INCIA, 33076, Bordeaux, France. .,CNRS, INCIA, UMR 5287, 33076, Bordeaux, France.
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Vazquez M, Frazier JH, Reichel CM, Peters J. Acute ovarian hormone treatment in freely cycling female rats regulates distinct aspects of heroin seeking. Learn Mem 2020; 27:6-11. [PMID: 31843977 PMCID: PMC6919190 DOI: 10.1101/lm.050187.119] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/20/2019] [Indexed: 12/15/2022]
Abstract
Females are at higher risk for certain opioid addictive behaviors, but the influence of ovarian hormones is unknown. In our rat model of heroin self-administration, females exhibited higher relapse rates that correlated with rates of heroin seeking on the first extinction session. We administered estradiol alone, or in combination with progesterone, 30 min prior to the first extinction session in freely cycling, heroin-seeking female rats. Although neither treatment produced long-term effects on relapse, each treatment regulated distinct aspects of heroin seeking. Estradiol treatment enhanced extinction memory retention, whereas the combination treatment acutely reduced expression of heroin seeking.
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Affiliation(s)
- Maribel Vazquez
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina 29425, USA
| | - Jessica H Frazier
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina 29425, USA
| | - Carmela M Reichel
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina 29425, USA
| | - Jamie Peters
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina 29425, USA
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Sánchez-Jiménez F, Medina MÁ, Villalobos-Rueda L, Urdiales JL. Polyamines in mammalian pathophysiology. Cell Mol Life Sci 2019; 76:3987-4008. [PMID: 31227845 PMCID: PMC11105599 DOI: 10.1007/s00018-019-03196-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/11/2019] [Accepted: 06/14/2019] [Indexed: 02/07/2023]
Abstract
Polyamines (PAs) are essential organic polycations for cell viability along the whole phylogenetic scale. In mammals, they are involved in the most important physiological processes: cell proliferation and viability, nutrition, fertility, as well as nervous and immune systems. Consequently, altered polyamine metabolism is involved in a series of pathologies. Due to their pathophysiological importance, PA metabolism has evolved to be a very robust metabolic module, interconnected with the other essential metabolic modules for gene expression and cell proliferation/differentiation. Two different PA sources exist for animals: PA coming from diet and endogenous synthesis. In the first section of this work, the molecular characteristics of PAs are presented as determinant of their roles in living organisms. In a second section, the metabolic specificities of mammalian PA metabolism are reviewed, as well as some obscure aspects on it. This second section includes information on mammalian cell/tissue-dependent PA-related gene expression and information on crosstalk with the other mammalian metabolic modules. The third section presents a synthesis of the physiological processes described as modulated by PAs in humans and/or experimental animal models, the molecular bases of these regulatory mechanisms known so far, as well as the most important gaps of information, which explain why knowledge around the specific roles of PAs in human physiology is still considered a "mysterious" subject. In spite of its robustness, PA metabolism can be altered under different exogenous and/or endogenous circumstances so leading to the loss of homeostasis and, therefore, to the promotion of a pathology. The available information will be summarized in the fourth section of this review. The different sections of this review also point out the lesser-known aspects of the topic. Finally, future prospects to advance on these still obscure gaps of knowledge on the roles on PAs on human physiopathology are discussed.
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Affiliation(s)
- Francisca Sánchez-Jiménez
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, and IBIMA (Biomedical Research Institute of Málaga), Málaga, Spain
- UNIT 741, CIBER de Enfermedades Raras (CIBERER), 29071, Málaga, Spain
| | - Miguel Ángel Medina
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, and IBIMA (Biomedical Research Institute of Málaga), Málaga, Spain
- UNIT 741, CIBER de Enfermedades Raras (CIBERER), 29071, Málaga, Spain
| | - Lorena Villalobos-Rueda
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, and IBIMA (Biomedical Research Institute of Málaga), Málaga, Spain
| | - José Luis Urdiales
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Andalucía Tech, and IBIMA (Biomedical Research Institute of Málaga), Málaga, Spain.
- UNIT 741, CIBER de Enfermedades Raras (CIBERER), 29071, Málaga, Spain.
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Aberoumandi SM, Vousooghi N, Tabrizi BA, Karimi P. Heroin-based crack induces hyperalgesia through β-arrestin 2 redistribution and phosphorylation of Erk1/2 and JNK in the periaqueductal gray area. Neurosci Lett 2019; 698:133-139. [PMID: 30641110 DOI: 10.1016/j.neulet.2019.01.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/11/2018] [Accepted: 01/10/2019] [Indexed: 01/23/2023]
Abstract
Continuous use of crack induces hyperalgesia which is related to drug tolerance. Despite cumulative evidence based on the growth rate of crack abuse, no serious study has been focused on the mechanisms of crack-induced hyperalgesia. This study aimed to elucidate whether extracellular signal-regulated kinases (Erk1/2)/β-arrestin pathways are involved in the crack-induced hyperalgesia. Fifty adult male Wistar rats were randomly divided into five groups: normal saline (NS), crack (0.9 mg/kg/day), heroin (1 mg/kg/day), crack + barbadin (100 μM), and heroin + barbadin groups, which received their intraperitoneal (i.p) treatments for four weeks. The thermal sensitivity was assessed using the hot-plate test. Moreover, phosphorylation of the Erk1/2 and JNK, as well as expression of protein kinase C-alpha (PKC-α), Mu-receptor (MOR), and β-arrestin 2 were determined in the whole lysate and membrane fraction using immunoblotting assay in the periaqueductal gray (PAG) area. The results demonstrated that chronic administration of crack and heroin significantly decreased hind-paw withdrawal latency compared to the NS group. Furthermore, crack as well as heroin administration increased phosphorylated Erk1/2 and JNK in the PAG. In addition, membrane β-arrestin 2 and PKC-α were significantly increased in the crack and heroin-received groups, while membrane MOR expression was decreased in the PAG. Nevertheless, co-administration of barbadin, an inhibitor of β-arrestin, and crack or heroin reversed all these changes. Our findings may partially confirm the role of β-arrestin 2 and PKC rearrangements, Erk1/2 and JNK phosphorylation in crack-induced hyperalgesia and provide potential therapeutic targets to attenuate crack-induced hyperalgesia.
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Affiliation(s)
- Seyed Mohsen Aberoumandi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran; Neurosciences Research Center (NSRC), Tabriz University Of Medical Sciences, Tabriz, Iran
| | - Nasim Vousooghi
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahram Amoughli Tabrizi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran
| | - Pouran Karimi
- Neurosciences Research Center (NSRC), Tabriz University Of Medical Sciences, Tabriz, Iran.
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Skatchkov SN, Antonov SM, Eaton MJ. Glia and glial polyamines. Role in brain function in health and disease. BIOCHEMISTRY MOSCOW SUPPLEMENT SERIES A-MEMBRANE AND CELL BIOLOGY 2016. [DOI: 10.1134/s1990747816010116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Tolerance and efficacy of a polyamine-deficient diet for the treatment of perioperative pain. Nutrition 2016; 36:33-40. [PMID: 28336105 DOI: 10.1016/j.nut.2016.02.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Revised: 02/07/2016] [Accepted: 02/21/2016] [Indexed: 11/21/2022]
Abstract
BACKGROUND Polyamines have been identified as pain agonists and interact with N-methyl-D-aspartate receptors. A prospective, randomized, multicenter, and blinded phase II clinical trial was conducted to evaluate a polyamine-deficient diet for the treatment of perioperative pain in patients during spinal surgery. METHODS All analyses followed the intention-to-treat principle. The trial was designed to evaluate the dose-ranging effect of a low polyamine diet with respect to a total (group 1) or partial (group 2) polyamine diet on perioperative pain (7 d before and 5 d after surgery). Pain (numerical scale at rest and motion), quality of life questionnaires (Brief Pain Inventory, EIFEL questionnaire, and Short Form-12 acute questionnaire), and tolerance of and compliance with the nutritional program were measured. RESULTS Compliance (preoperatively: 100% in group 1 and 83% in group 2; postoperatively: 83% in group 1 and 71% in group 2) and tolerance were good. After 7 d following the diet before surgery, decreased pain was observed in group 1 whereas no effect was observed in group 2 (P = 0.144). This analgesic effect became significant in group 1 in the subgroup of patients with initial high levels of pain (NS ≥ 4) at rest (P = 0.03) and during motion (P = 0.011). Quality of life was significantly improved in group 1 (P = 0.0465). In the postoperative period, pain was significantly decreased in group 1 compared to group 2 at rest (P = 0.022) and during motion (P = 0.029). The effect was significantly better on patients with higher initial pain both at rest (P = 0.013) and during motion (P = 0.005) in group 1 compared to group 2. CONCLUSION Suppression of polyamines from the diet offers a nutrition-based treatment option for perioperative pain reduction independent of and complementary to typical analgesic approaches.
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Abstract
This review focuses on the roles of glia and polyamines (PAs) in brain function and dysfunction, highlighting how PAs are one of the principal differences between glia and neurons. The novel role of PAs, such as putrescine, spermidine, and spermine and their precursors and derivatives, is discussed. However, PAs have not yet been a focus of much glial research. They affect many neuronal and glial receptors, channels, and transporters. They are therefore key elements in the development of many diseases and syndromes, thus forming the rationale for PA-focused and glia-focused therapy for these conditions.
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Affiliation(s)
- Serguei N Skatchkov
- Department of Biochemistry, School of Medicine, Universidad, Central del Caribe, PO Box 60-327, Bayamón, PR 00960-6032, USA; Department of Physiology, School of Medicine, Universidad, Central del Caribe, PO Box 60-327, Bayamón, PR 00960-6032, USA.
| | - Michel A Woodbury-Fariña
- Department of Psychiatry, University of Puerto Rico School of Medicine, 307 Calle Eleonor Roosevelt, San Juan, PR 00918-2720, USA
| | - Misty Eaton
- Department of Biochemistry, School of Medicine, Universidad, Central del Caribe, PO Box 60-327, Bayamón, PR 00960-6032, USA
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Abstract
This paper is the thirty-sixth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2013 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY 11367, United States.
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The phosphodiesterase-4 inhibitor rolipram attenuates heroin-seeking behavior induced by cues or heroin priming in rats. Int J Neuropsychopharmacol 2014; 17:1397-407. [PMID: 24832929 DOI: 10.1017/s1461145714000595] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Inhibition of phosphodiesterase-4 (PDE4), an enzyme that specifically hydrolyzes cyclic adenosine monophosphate (cAMP) increases intracellular cAMP/cAMP-response element binding protein (CREB) signaling. Activation of this signaling is considered as an important compensatory response that decreases motivational properties of drugs of abuse. However, it is not known whether PDE4 is involved in heroin seeking. Self-administration of heroin (50 μg/kg/infusion) was performed under the fixed ratio 1 (FR1) schedule for 14 d and then drug seeking was extinguished for 10 d. The progressive ratio schedule was used to evaluate the relative motivational value of heroin reinforcement. After training, the conditioned cue or heroin priming (250 μg/kg) was introduced for the reinstatement of heroin-seeking behavior. Pretreatment (i.p.) with rolipram (0.03-0.3 mg/kg), a prototypical, selective PDE4 inhibitor, failed to inhibit heroin self-administration under the FR1 schedule, but decreased the reward values under the progressive ratio schedule in a dose-dependent manner. In addition, rolipram decreased the reinstatement of heroin seeking induced by cues or heroin priming even at the lowest dose (0.03 mg/kg); in contrast, the highest dose (0.3 mg/kg) of rolipram was required to decrease sucrose reinforcement. Finally, the effects of rolipram on heroin-seeking behavior were correlated with the increases in expression of phosphorylated CREB in the nucleus accumbens. The study demonstrated that rolipram inhibited heroin reward and heroin-seeking behavior. The results suggest that PDE4 plays an essential role in mediating heroin seeking and that PDE4 inhibitors may be used as a potential pharmacotherapeutic approach for heroin addiction.
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