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Kumar J, Naina Mohamed I, Mohamed R, Ugusman A, Muzaimi M, Mohamed W, Yahaya MF, Teoh SL, Kamaluddin MR, Abdul Hamid H, Mehat MZ, Shanmugam PK. Locomotion changes in methamphetamine and amphetamine withdrawal: a systematic review. Front Pharmacol 2024; 15:1428492. [PMID: 39086393 PMCID: PMC11288965 DOI: 10.3389/fphar.2024.1428492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Accepted: 06/26/2024] [Indexed: 08/02/2024] Open
Abstract
Despite extensive preclinical research over the years, a significant gap remains in our understanding of the specific effects of methamphetamine (METH) and amphetamine (AMPH) withdrawal. Understanding these differences could be pivotal to unveiling the unique pathophysiology underlying each stimulant. This may facilitate the development of targeted and effective treatment strategies tailored to the specific characteristics of each substance. Following PRISMA guidelines, this systematic review was conducted to examine alterations in spontaneous locomotor activity, specifically horizontal activity, in animals experiencing withdrawal from extended and repeated administration of AMPH or METH. Original articles were retrieved from four electronic databases, supplemented by a review of the references cited in the published papers. A total of thirty-one full-length articles (n = 31) were incorporated in the analysis. The results indicated that six studies documented a significant increase in horizontal activity among animals, seven studies reported decreased locomotion, and eighteen studies (8 AMPH; 10 METH) reported no significant alterations in the animals' locomotor activity. Studies reporting heightened locomotion mainly employed mice undergoing withdrawal from METH, studies reporting diminished locomotion predominantly involved rats undergoing withdrawal from AMPH, and studies reporting no significant changes in horizontal activity employed both rats and mice (12 rats; 6 mice). Drug characteristics, routes of administration, animal models, dosage regimens, duration, and assessment timing seem to influence the observed outcomes. Despite more than 50% of papers enlisted in this review indicate no significant changes in the locomotion during the stimulant withdrawal, the unique reactions of animals to withdrawal from METH and AMPH reported by some underscore the need for a more nuanced understanding of stimulant withdrawal.
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Affiliation(s)
- Jaya Kumar
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Isa Naina Mohamed
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Rashidi Mohamed
- Department of Family Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Azizah Ugusman
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Mustapha Muzaimi
- Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia
| | - Wael Mohamed
- Basic Medical Science Department, Kulliyyah of Medicine, International Islamic University Malaysia, Kuantan, Malaysia
- Department of Clinical Pharmacology, Faculty of Medicine, Menoufia University, Shebin El Kom, Egypt
| | - Mohamad Fairuz Yahaya
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Seong Lin Teoh
- Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Malaysia
| | - Mohammad Rahim Kamaluddin
- The Centre for Research in Psychology and Human Well-Being, Faculty of Social Sciences and Humanities, The National University of Malaysia, Bangi, Malaysia
| | - Hafizah Abdul Hamid
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, Malaysia
| | - Muhammad Zulfadli Mehat
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, Malaysia
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Cole RH, Moussawi K, Joffe ME. Opioid modulation of prefrontal cortex cells and circuits. Neuropharmacology 2024; 248:109891. [PMID: 38417545 PMCID: PMC10939756 DOI: 10.1016/j.neuropharm.2024.109891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/30/2024] [Accepted: 02/26/2024] [Indexed: 03/01/2024]
Abstract
Several neurochemical systems converge in the prefrontal cortex (PFC) to regulate cognitive and motivated behaviors. A rich network of endogenous opioid peptides and receptors spans multiple PFC cell types and circuits, and this extensive opioid system has emerged as a key substrate underlying reward, motivation, affective behaviors, and adaptations to stress. Here, we review the current evidence for dysregulated cortical opioid signaling in the pathogenesis of psychiatric disorders. We begin by providing an introduction to the basic anatomy and function of the cortical opioid system, followed by a discussion of endogenous and exogenous opioid modulation of PFC function at the behavioral, cellular, and synaptic level. Finally, we highlight the therapeutic potential of endogenous opioid targets in the treatment of psychiatric disorders, synthesizing clinical reports of altered opioid peptide and receptor expression and activity in human patients and summarizing new developments in opioid-based medications. This article is part of the Special Issue on "PFC circuit function in psychiatric disease and relevant models".
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Affiliation(s)
- Rebecca H Cole
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, 15219, USA; Translational Neuroscience Program, University of Pittsburgh, Pittsburgh, PA, USA; Center for Neuroscience University of Pittsburgh, Pittsburgh, PA, USA
| | - Khaled Moussawi
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, 15219, USA; Translational Neuroscience Program, University of Pittsburgh, Pittsburgh, PA, USA; Center for Neuroscience University of Pittsburgh, Pittsburgh, PA, USA
| | - Max E Joffe
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, 15219, USA; Translational Neuroscience Program, University of Pittsburgh, Pittsburgh, PA, USA; Center for Neuroscience University of Pittsburgh, Pittsburgh, PA, USA.
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3
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Vincent B, Shukla M. The common denominators of Parkinson's disease pathogenesis and methamphetamine abuse. Curr Neuropharmacol 2023; 22:CN-EPUB-134343. [PMID: 37691228 PMCID: PMC11337683 DOI: 10.2174/1570159x21666230907151226] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 09/12/2023] Open
Abstract
The pervasiveness and mortality associated with methamphetamine abuse has doubled during the past decade suggesting a possible worldwide substance use crisis. Epitomizing the pathophysiology and toxicology of methamphetamine abuse proclaims severe signs and symptoms of neurotoxic and neurobehavioral manifestations in both humans and animals. Most importantly, chronic use of this drug enhances the probability of developing neurodegenerative diseases manifolds. Parkinson's disease is one such neurological disorder, which significantly and evidently not only shares a number of toxic pathogenic mechanisms induced by methamphetamine exposure but is also interlinked both structurally andgenetically. Methamphetamine-induced neurodegeneration involves altered dopamine homeostasis that promotes the aggregation of α-synuclein protofibrils in the dopaminergic neurons and drives these neurons to make them more vulnerable to degeneration as recognized in Parkinson's disease. Moreover, the pathologic mechanisms such as mitochondrial dysfunction, oxidative stress, neuroinflammation and decreased neurogenesis detected in methamphetamine abusers dramatically resemble to what is observed in Parkinson's disease cases. Therefore, the present review comprehensively cumulates a holistic illustration of various genetic and molecular mechanisms putting across the notion of how methamphetamine administration and intoxication might lead to Parkinson's disease-like pathology and Parkinsonism.
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Affiliation(s)
- Bruno Vincent
- Institute of Molecular and Cellular Pharmacology, Laboratory of Excellence DistALZ, Université Côte d'Azur, INSERM, CNRS, Sophia-Antipolis, 06560, Valbonne, France
| | - Mayuri Shukla
- Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 10210, Bangkok, Thailand
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Alizamini MM, Li Y, Zhang JJ, Liang J, Haghparast A. Endocannabinoids and addiction memory: Relevance to methamphetamine/morphine abuse. World J Biol Psychiatry 2022; 23:743-763. [PMID: 35137652 DOI: 10.1080/15622975.2022.2039408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
AIM This review aims to summarise the role of endocannabinoid system (ECS), incluing cannabinoid receptors and their endogenous lipid ligands in the modulation of methamphetamine (METH)/morphine-induced memory impairments. METHODS Here, we utilized the results from researches which have investigated regulatory role of ECS (including cannabinoid receptor agonists and antagonists) on METH/morphine-induced memory impairments. RESULTS Among the neurotransmitters, glutamate and dopamine seem to play a critical role in association with the ECS to heal the drug-induced memory damages. Also, the amygdala, hippocampus, and prefrontal cortex are three important brain regions that participate in both drug addiction and memory task processes, and endocannabinoid neurotransmission have been investigated. CONCLUSION ECS can be regarded as a treatment for the side effects of METH and morphine, and their memory-impairing effects.
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Affiliation(s)
- Mirmohammadali Mirramezani Alizamini
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Yonghui Li
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Jian-Jun Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Jing Liang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Abbas Haghparast
- Neuroscience Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Althobaiti YS, Almutairi FM, Alshehri FS, Altowairqi E, Marghalani AM, Alghorabi AA, Alsanie WF, Gaber A, Alsaab HO, Almalki AH, Hakami AY, Alkhalifa T, Almalki AD, Hardy AMG, Shah ZA. Involvement of the dopaminergic system in the reward-related behavior of pregabalin. Sci Rep 2021; 11:10577. [PMID: 34011976 PMCID: PMC8134490 DOI: 10.1038/s41598-021-88429-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 04/08/2021] [Indexed: 01/23/2023] Open
Abstract
There has been an increase in cases of drug addiction and prescription drug abuse worldwide. Recently, pregabalin abuse has been a focus for many healthcare agencies, as highlighted by epidemiological studies. We previously evaluated the possibility of pregabalin abuse using the conditioned place preference (CPP) paradigm. We observed that a 60 mg/kg dose could induce CPP in mice and that pregabalin-rewarding properties were mediated through glutamate neurotransmission. Notably, the dopaminergic reward circuitry is also known to play a crucial role in medication-seeking behavior. Therefore, this study aimed to explore the possible involvement of dopaminergic receptor-1 in pregabalin-induced CPP. Mice were randomly allocated to receive saline or the dopamine-1 receptor antagonist SKF-83566 (0.03 mg/kg, intraperitoneal). After 30 min, the mice received either saline or pregabalin (60 mg/kg) during the conditioning phase. Among the control groups that received saline or SKF-83566, the time spent in the two conditioning chambers was not significantly altered. However, among the pregabalin-treated group, there was a marked increase in the time spent in the drug-paired chamber compared to the time spent in the vehicle-paired chamber. Notably, blocking dopamine-1 receptors with SKF-83566 completely prevented pregabalin-induced place preference, thus demonstrating the engagement of the dopaminergic system in pregabalin-induced reward-related behavior.
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Affiliation(s)
- Yusuf S Althobaiti
- Department of Pharmacology and Toxicology, College of Pharmacy, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
- General Administration for Precursors and Laboratories, General Directorate of Narcotics Control, Ministry of Interior, Riyadh, Saudi Arabia.
| | - Farooq M Almutairi
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
- Deanship of Scientific Research, Taif University, Taif, 21944, Saudi Arabia
- Department of Clinical Laboratories Sciences, University of Hafar Al-Batin, College of Clinical Laboratories Sciences, Hafar Al-Batin, 39923, Saudi Arabia
| | - Fahad S Alshehri
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
| | - Ebtehal Altowairqi
- Department of Pharmacology and Toxicology, College of Pharmacy, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Aliyah M Marghalani
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Amal A Alghorabi
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Walaa F Alsanie
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, 21944, Saudi Arabia
| | - Ahmed Gaber
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
- Department of Biology, Faculty of Science, Taif University, Taif, 21944, Saudi Arabia
| | - Hashem O Alsaab
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
- Department of Pharmaceutics and Pharmaceutical Technology, Taif University, Taif, 21944, Saudi Arabia
| | - Atiah H Almalki
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Alqassem Y Hakami
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia
- King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
| | - Turki Alkhalifa
- General Administration for Precursors and Laboratories, General Directorate of Narcotics Control, Ministry of Interior, Riyadh, Saudi Arabia
| | - Ahmad D Almalki
- General Administration for Precursors and Laboratories, General Directorate of Narcotics Control, Ministry of Interior, Riyadh, Saudi Arabia
| | - Ana M G Hardy
- Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH, USA
| | - Zahoor A Shah
- Department of Medicinal and Biological Chemistry, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH, USA
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Cannabidiol enhanced the development of sensitization to the expression of methamphetamine-induced conditioned place preference in male rats. J Psychiatr Res 2021; 137:260-265. [PMID: 33725638 DOI: 10.1016/j.jpsychires.2021.02.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 01/18/2021] [Accepted: 02/17/2021] [Indexed: 02/06/2023]
Abstract
Cannabis and ecstasy are illicit substances, and currently, there are no approved treatments for methamphetamine (METH) use disorder. Some studies have proposed that cannabidiol (CBD) decreases the motivation for METH seeking, but reports indicate that the therapeutic benefits are only for heroin. Here, we studied the interaction between CBD and METH during the sensitization phase on the rewarding effect of METH, using the conditioned place preference (CPP) paradigm to measure possible alterations in sensitivity. Our data showed that i. p. injection of METH created METH-induced CPP at two of the highest applied doses (1 and 2 mg/kg), and injection of METH during the sensitization period caused an establishment of METH-induced CPP at lower doses (0.25 and 0.5 mg/kg). Data also revealed that i. c.v. administration of CBD during the sensitization phase, shifted the establishment of METH-induced CPP toward a lower dose (0.5 mg/kg). Concurrent administration of CBD (10 μg/5 μl, i. c.v.) and METH (0.25 mg/kg, i. p.) during sensitization phase established METH-induced CPP with sub-threshold doses of METH (0.125, 0.25, and 0.5 mg/kg). Our results suggest the involvement of CBD and prior exposure to METH in creating sensitization to METH CPP.
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Ordak M, Zmysłowska A, Bielski M, Rybak D, Tomaszewska M, Wyszomierska K, Kmiec A, Garlicka N, Zalewska M, Zalewski M, Nasierowski T, Muszynska E, Bujalska-Zadrozny M. Pharmacotherapy of Patients Taking New Psychoactive Substances: A Systematic Review and Analysis of Case Reports. Front Psychiatry 2021; 12:669921. [PMID: 33967865 PMCID: PMC8102790 DOI: 10.3389/fpsyt.2021.669921] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 03/31/2021] [Indexed: 11/13/2022] Open
Abstract
Background: In recent years, an increase in the frequency of hospitalizations of patients taking newer and newer psychoactive substances has been observed around the world. Each year, authors publish case reports of patients who consumed previously unknown NPS. Most publications of this type concern the period between 2014 and 2016. However, no publication systematically reviews the pharmacotherapy used in these cases. This study aims to review the case reports of patients taking NPS published between 2010 and 2019, as well as analyzing the pharmacotherapy used. Methods: We searched the Thomson (Web of Knowledge), PubMed/Medline, Science Direct, Scopus and Google Scholar databases. The search was performed using all possible combinations of the term "case report" describing the use of NPS, also referred to as designer medications, internet medications, research chemicals and herbal highs. Results: We analyzed 51 case reports on the intake of various types of NPS. Most of them (p < 0.001) concerned the use of synthetic cannabinoids (41.2%) and cathinones (31.4%). The pharmacotherapy applied primarily (p < 0.001) consisted of administering benzodiazepines to patients (62.7%), most of whom took only this group of medications (25.5%), followed by groups receiving benzodiazepines combined with neuroleptics (15.7%) and muscle relaxants (11.8%). Opioids were administered primarily to patients taking synthetic opioids (p < 0.001). Of the 5 cases of deaths from NPS reported in the literature, three relate specifically to the synthetic opioid MT-45. The later the time period, the more medications patients were administered (p = 0.02). Conclusion: In the pharmacotherapy for NPS poisoning, one should focus primarily on combating psychomotor agitation.
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Affiliation(s)
- Michal Ordak
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Aleksandra Zmysłowska
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Miłosz Bielski
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Daniel Rybak
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Maja Tomaszewska
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Katarzyna Wyszomierska
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Aleksandra Kmiec
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Natalia Garlicka
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Maria Zalewska
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | - Michal Zalewski
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
| | | | - Elzbieta Muszynska
- Department of Medical Biology, Medical University of Bialystok, Bialystok, Poland
| | - Magdalena Bujalska-Zadrozny
- Department of Pharmacodynamics, Centre for Preclinical, Research and Technology (CePT), Medical University of Warsaw, Warsaw, Poland
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Sun K, Mu Q, Chang H, Zhang C, Wang Y, Rong S, Liu S, Zuo D, He Z, Wan D, Yang H, Wang F, Sun T. Postretrieval Microinjection of Baclofen Into the Agranular Insular Cortex Inhibits Morphine-Induced CPP by Disrupting Reconsolidation. Front Pharmacol 2020; 11:743. [PMID: 32508658 PMCID: PMC7248341 DOI: 10.3389/fphar.2020.00743] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 05/04/2020] [Indexed: 12/15/2022] Open
Abstract
Environmental cues associated with drug abuse are powerful mediators of drug craving and relapse in substance-abuse disorders. Consequently, attenuating the strength of cue-drug memories could reduce the number of factors that cause drug craving and relapse. Interestingly, impairing cue-drug memory reconsolidation is a generally accepted strategy aimed at reducing the intensity of cues that trigger drug-seeking and drug-taking behaviors. In addition, the agranular insular cortex (AI) is an important component of the neural circuits underlying drug-related memory reconsolidation. GABAB receptors (GABABRs) are potential targets for the treatment of addiction, and baclofen (BLF) is the only prototypical GABAB agonist available for application in clinical addiction treatment. Furthermore, ΔFosB is considered a biomarker for the evaluation of potential therapeutic interventions for addiction. Here, we used the morphine-induced conditioned place preference (CPP) paradigm to investigate whether postretrieval microinjections of BLF into the AI could affect reconsolidation of drug-reward memory, reinstatement of CPP, and the level of ΔFosB in mice. Our results showed that BLF infused into the AI immediately following morphine CPP memory retrieval, but not 6 h postretrieval or following nonretrieval, could eliminate the expression of a morphine CPP memory. This effect persisted in a morphine-priming–induced reinstatement test, suggesting that BLF in the AI was capable of preventing the reconsolidation of the morphine CPP memory. Our results also showed that the elimination of morphine CPP memory was associated with reduced morphine-associated ΔFosB expression in the longer term. Taken together, the results of our research provide evidence to support that GABABRs in the AI have an important role in drug-cue memory reconsolidation and further our understanding of the role of the AI in drug-related learning and memory.
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Affiliation(s)
- Kuisheng Sun
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, The People's Hospital of Gaozhou, Gaozhou, China
| | - Qingchun Mu
- Department of Neurosurgery, The People's Hospital of Gaozhou, Gaozhou, China
| | - Haigang Chang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Chun Zhang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Yehua Wang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Shikuo Rong
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Shenhai Liu
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Di Zuo
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Zhenquan He
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China
| | - Ding Wan
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Hua Yang
- Department of Critical Care Medicine, The People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
| | - Feng Wang
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Tao Sun
- Ningxia Key Laboratory of Cerebrocranial Disease, Incubation Base of National Key Laboratory, Ningxia Medical University, Yinchuan, China.,Department of Neurosurgery, General Hospital of Ningxia Medical University, Yinchuan, China
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9
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mGluR5 upregulation and the effects of repeated methamphetamine administration and withdrawal on the rewarding efficacy of ketamine and social interaction. Toxicol Appl Pharmacol 2018; 360:58-68. [DOI: 10.1016/j.taap.2018.09.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/18/2018] [Accepted: 09/23/2018] [Indexed: 11/17/2022]
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10
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Fan Y, Chen Y, Zhang S, Huang M, Wang S, Li Y, Bai J. Morphine reverses the effects of 1-methyl-4-phenylpyridinium in PC12 cells through activating PI3K/Akt. Int J Neurosci 2018; 129:30-35. [PMID: 29936883 DOI: 10.1080/00207454.2018.1492575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
AIM OF THE STUDY Parkinson's disease (PD) is a neurodegenerative disorder. It is caused by the degeneration of dopaminergic neurons and the dopamine (DA) deletion in the substantia nigra pars compacta (SNpc). Morphine elevates the level of dopamine in the mesolimbic dopamine system and plays a role in alleviating PD symptoms. However, the molecular mechanism is still unclear. The aim of the study is to investigate the mechanism on morphine alleviating PD symptoms. MATERIALS AND METHODS The viability of PC12 cells was measured by using MTT assay. The expressions of tyrosine hydroxylase (TH), thioredoxin-1 (Trx-1), CyclinD1 and Cyclin-dependent kinase5 (Cdk5) were detected by Western Blot. RESULTS In present study, we found that morphine increased the cell viability in PC12 cells. 1-methyl-4-phenylpyridi-nium (MPP+) reduced the cell viability and TH expression, which were reversed by morphine. MPP+ decreased the expressions of Trx-1, CyclinD1, Cdk5, which were restored by morphine. Moreover, the role of morphine in restoring the expressions of Trx-1, CyclinD1 and Cdk5 decreased by MPP+ was abolished by LY294002, phosphatidylinositol-3-kinase (PI3K)/Akt inhibitor. CONCLUSIONS These results suggest that morphine reverses effects induced by MPP þ through activating PI3K/Akt pathway.
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Affiliation(s)
- Yuan Fan
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , China.,b Medical Faculty , Kunming University of Science and Technology , Kunming , China
| | - Yan Chen
- b Medical Faculty , Kunming University of Science and Technology , Kunming , China
| | - Se Zhang
- b Medical Faculty , Kunming University of Science and Technology , Kunming , China
| | - Mengbing Huang
- b Medical Faculty , Kunming University of Science and Technology , Kunming , China
| | - Shengdong Wang
- b Medical Faculty , Kunming University of Science and Technology , Kunming , China
| | - Ye Li
- b Medical Faculty , Kunming University of Science and Technology , Kunming , China
| | - Jie Bai
- b Medical Faculty , Kunming University of Science and Technology , Kunming , China
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11
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Serotonin-1A receptor dependent modulation of pain and reward for improving therapy of chronic pain. Pharmacol Res 2018; 134:212-219. [DOI: 10.1016/j.phrs.2018.06.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/12/2018] [Accepted: 06/29/2018] [Indexed: 12/24/2022]
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12
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Jacobskind JS, Rosinger ZJ, Gonzalez T, Zuloaga KL, Zuloaga DG. Chronic Methamphetamine Exposure Attenuates Neural Activation in Hypothalamic-Pituitary-Adrenal Axis-Associated Brain Regions in a Sex-specific Manner. Neuroscience 2018; 380:132-145. [PMID: 29679646 DOI: 10.1016/j.neuroscience.2018.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 03/16/2018] [Accepted: 04/09/2018] [Indexed: 12/15/2022]
Abstract
Sex differences in methamphetamine (MA) abuse and consequences of MA have been reported with females showing an increased addiction phenotype and withdrawal symptoms. One mechanism through which these effects might occur is via sex-specific alterations in the hypothalamic-pituitary-adrenal (HPA) axis and its associated brain regions. In this study, mice were administered MA (5 mg/kg) or saline for 10 consecutive days. During early withdrawal, anxiety-like behaviors were assessed in the open field, light/dark box, and elevated plus maze. At ten days of withdrawal, mice were injected with a final dose of MA (5 mg/kg) or saline. Chronic MA did not alter anxiety-like behaviors or corticosterone responses to a final dose of MA, although females showed elevated corticosterone responses compared to males. Chronic MA attenuated final MA-induced c-Fos in both sexes in the paraventricular hypothalamus (PVH), bed nucleus of the stria terminalis (BNST), cingulate cortex, central and basolateral amygdala. In CA1 and CA3 hippocampal areas, c-Fos attenuation by chronic MA occurred only in females. Within the PVH, final MA injection increased c-Fos to a greater extent in females compared to males regardless of prior MA exposure. Dual-labeling of c-Fos with glucocorticoid receptor revealed a specific attenuation of neural activation within this cell type in the PVH, central and basolateral amygdala, and BNST. Together these findings demonstrate that chronic MA can suppress subsequent activation of HPA axis-associated brain regions and cell phenotypes. Further, in select regions this reduction is sex-specific. These changes may contribute to reported sex differences in MA abuse patterns.
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Affiliation(s)
- Jason S Jacobskind
- University at Albany, Department of Psychology, Albany, NY 12222, United States
| | - Zachary J Rosinger
- University at Albany, Department of Psychology, Albany, NY 12222, United States
| | - Tiffany Gonzalez
- University at Albany, Department of Psychology, Albany, NY 12222, United States
| | - Kristen L Zuloaga
- Albany Medical College, Department of Neuroscience & Experimental Therapeutics, Albany, NY 12208, United States
| | - Damian G Zuloaga
- University at Albany, Department of Psychology, Albany, NY 12222, United States.
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Ghrelin receptor antagonism of morphine-induced conditioned place preference and behavioral and accumbens dopaminergic sensitization in rats. Neurochem Int 2017; 110:101-113. [DOI: 10.1016/j.neuint.2017.09.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 08/17/2017] [Accepted: 09/24/2017] [Indexed: 01/06/2023]
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Yuan J, Liu XD, Han M, Lv RB, Wang YK, Zhang GM, Li Y. Comparison of striatal dopamine transporter levels in chronic heroin-dependent and methamphetamine-dependent subjects. Addict Biol 2017; 22:229-234. [PMID: 26040446 DOI: 10.1111/adb.12271] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
To compare the effects of heroin and methamphetamine (METH) addiction on dopamine transporters (DATs) in the same dose and duration, we assessed DAT levels in the striatum by 99m Tc-TRODAT-1 single-photon emission computed tomography (SPECT) brain images in people with heroin and METH dependence. We recruited 21 healthy human controls, 23 heroin-dependent subjects and 25 METH abusers. The heroin- and METH-dependent subjects exhibited negative urine toxicology after undergoing physiological detoxification. All subjects underwent SPECT brain imaging, and specific tracer uptake ratios (SURs) were assessed bilaterally in the regions of interest. A significant SUR reduction in heroin-dependent subjects and METH-dependent subjects compared with healthy controls was found in the left striatum, right striatum, left caudate nucleus, right caudate nucleus, left putamen and right putamen. There were no significant differences in the heroin group and METH group for the left striatum, right striatum, left caudate nucleus, right caudate nucleus, left putamen and right putamen. The scores of craving, HAMA (Hamilton Anxiety Rating Scale), in heroin abusers were lower than in the METH abusers. Our results show that people with heroin and METH dependence who are currently abstinent had lower DAT levels in the striatum than healthy controls. There were no differences in striatal DAT in heroin and METH users. These results suggest that chronic heroin and METH abuse appears to produce similar effects in striatal DAT in humans. METH users may have more serious craving and anxiety symptoms than heroin users with prolonged abstinence.
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Affiliation(s)
- Jie Yuan
- Department of Nuclear Medicine; Fudan University; China
| | - Xing Dang Liu
- Department of Nuclear Medicine; Fudan University; China
| | - Mei Han
- Department of Huashan Hospital; Fudan University; China
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry; Beijing Normal University; China
| | - Rong Bin Lv
- Department of Nuclear Medicine; Fudan University; China
| | - Yuan Kai Wang
- Department of Nuclear Medicine; Fudan University; China
| | | | - Yu Li
- Drug Rehabilitation Centre; China
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15
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Chauchard E, Goncharov O, Krupitsky E, Gorelick DA. Cannabis withdrawal in patients with and without opioid dependence. Subst Abus 2015; 35:230-4. [PMID: 24745656 DOI: 10.1080/08897077.2014.898605] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cannabis use is common among opioid-dependent individuals, but little is known about cannabis withdrawal in this population. METHODS Thirty inpatients (57% men) completed the Marijuana Quit Questionnaire (MJQQ) after completing acute heroin detoxification treatment in Saint Petersburg, Russia. The MJQQ collected data on motivations for quitting, withdrawal symptoms, and coping strategies used to help maintain abstinence during their most "serious" (self-defined) quit attempt made without formal treatment outside a controlled environment. RESULTS At the start of their quit attempt, 70% of participants smoked cannabis at least weekly (40% daily), averaging [SD] 2.73 [1.95] joints daily; 60% were heroin dependent. Subjects with heroin dependence were significantly older at the start of their quit attempt (22.9 [3.6] vs. 19.1 [2.9] years), were significantly less likely to report withdrawal irritability/anger/aggression (22% vs. 58%), restlessness (0% vs. 25%), or physical symptoms (6% vs. 33%), or to meet diagnostic criteria for DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th edition) cannabis withdrawal syndrome (6% vs. 33%), and had shorter duration of abstinence (29.6 [28.7] vs 73.7 [44.1] months) than those without heroin dependence. CONCLUSION Cannabis users with opioid dependence are less likely to experience cannabis withdrawal, suggesting that opiate use may prevent or mask the experience of cannabis withdrawal. RESULTS should be considered preliminary due to small convenience sample and retrospective data.
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Affiliation(s)
- Emeline Chauchard
- a Centre d'étude et de recherche en psychopathologie (CERPP) , Université de Toulouse-Le Mirail , Toulouse , France
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16
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Salum C, Schmidt F, Michel PP, Del-Bel E, Raisman-Vozari R. Signaling Mechanisms in the Nitric Oxide Donor- and Amphetamine-Induced Dopamine Release in Mesencephalic Primary Cultured Neurons. Neurotox Res 2015; 29:92-104. [DOI: 10.1007/s12640-015-9562-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/27/2015] [Accepted: 09/09/2015] [Indexed: 12/30/2022]
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17
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Aguilar M, Roger-Sánchez C, Rodríguez-Arias M, Miñarro J. Cocaine enhances the conditioned rewarding effects of MDMA in adolescent mice. Brain Res Bull 2015; 113:27-33. [DOI: 10.1016/j.brainresbull.2015.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 02/12/2015] [Accepted: 02/16/2015] [Indexed: 01/20/2023]
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Increased functional connectivity in the resting-state basal ganglia network after acute heroin substitution. Transl Psychiatry 2015; 5:e533. [PMID: 25803496 PMCID: PMC4354356 DOI: 10.1038/tp.2015.28] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 01/06/2015] [Accepted: 01/20/2015] [Indexed: 01/17/2023] Open
Abstract
Reinforcement signals in the striatum are known to be crucial for mediating the subjective rewarding effects of acute drug intake. It is proposed that these effects may be more involved in early phases of drug addiction, whereas negative reinforcement effects may occur more in later stages of the illness. This study used resting-state functional magnetic resonance imaging to explore whether acute heroin substitution also induced positive reinforcement effects in striatal brain regions of protracted heroin-maintained patients. Using independent component analysis and a dual regression approach, we compared resting-state functional connectivity (rsFC) strengths within the basal ganglia/limbic network across a group of heroin-dependent patients receiving both an acute infusion of heroin and placebo and 20 healthy subjects who received placebo only. Subsequent correlation analyses were performed to test whether the rsFC strength under heroin exposure correlated with the subjective rewarding effect and with plasma concentrations of heroin and its main metabolites morphine. Relative to the placebo treatment in patients, heroin significantly increased rsFC of the left putamen within the basal ganglia/limbic network, the extent of which correlated positively with patients' feelings of rush and with the plasma level of morphine. Furthermore, healthy controls revealed increased rsFC of the posterior cingulate cortex/precuneus in this network relative to the placebo treatment in patients. Our results indicate that acute heroin substitution induces a subjective rewarding effect via increased striatal connectivity in heroin-dependent patients, suggesting that positive reinforcement effects in the striatum still occur after protracted maintenance therapy.
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Buchta WC, Riegel AC. Chronic cocaine disrupts mesocortical learning mechanisms. Brain Res 2015; 1628:88-103. [PMID: 25704202 DOI: 10.1016/j.brainres.2015.02.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 01/28/2015] [Accepted: 02/01/2015] [Indexed: 01/06/2023]
Abstract
The addictive power of drugs of abuse such as cocaine comes from their ability to hijack natural reward and plasticity mechanisms mediated by dopamine signaling in the brain. Reward learning involves burst firing of midbrain dopamine neurons in response to rewards and cues predictive of reward. The resulting release of dopamine in terminal regions is thought to act as a teaching signaling to areas such as the prefrontal cortex and striatum. In this review, we posit that a pool of extrasynaptic dopaminergic D1-like receptors activated in response to dopamine neuron burst firing serve to enable synaptic plasticity in the prefrontal cortex in response to rewards and their cues. We propose that disruptions in these mechanisms following chronic cocaine use contribute to addiction pathology, in part due to the unique architecture of the mesocortical pathway. By blocking dopamine reuptake in the cortex, cocaine elevates dopamine signaling at these extrasynaptic receptors, prolonging D1-receptor activation and the subsequent activation of intracellular signaling cascades, and thus inducing long-lasting maladaptive plasticity. These cellular adaptations may account for many of the changes in cortical function observed in drug addicts, including an enduring vulnerability to relapse. Therefore, understanding and targeting these neuroadaptations may provide cognitive benefits and help prevent relapse in human drug addicts.
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Affiliation(s)
- William C Buchta
- Neurobiology of Addiction Research Center (NARC), Medical University of South Carolina, Charleston, SC 29425, USA
| | - Arthur C Riegel
- Neurobiology of Addiction Research Center (NARC), Medical University of South Carolina, Charleston, SC 29425, USA.
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20
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Cotter R, Pei Y, Mus L, Harmeier A, Gainetdinov RR, Hoener MC, Canales JJ. The trace amine-associated receptor 1 modulates methamphetamine's neurochemical and behavioral effects. Front Neurosci 2015; 9:39. [PMID: 25762894 PMCID: PMC4327507 DOI: 10.3389/fnins.2015.00039] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 01/27/2015] [Indexed: 11/13/2022] Open
Abstract
The newly discovered trace amine-associated receptor 1 (TAAR1) has the ability to regulate both dopamine function and psychostimulant action. Here, we tested in rats the ability of RO5203648, a selective TAAR1 partial agonist, to modulate the physiological and behavioral effects of methamphetamine (METH). In experiment 1, RO5203468 dose- and time-dependently altered METH-induced locomotor activity, manifested as an early attenuation followed by a late potentiation of METH's stimulating effects. In experiment 2, rats received a 14-day treatment regimen during which RO5203648 was co-administered with METH. RO5203648 dose-dependently attenuated METH-stimulated hyperactivity, with the effects becoming more apparent as the treatments progressed. After chronic exposure and 3-day withdrawal, rats were tested for locomotor sensitization. RO5203648 administration during the sensitizing phase prevented the development of METH sensitization. However, RO5203648, at the high dose, cross-sensitized with METH. In experiment 3, RO5203648 dose-dependently blocked METH self-administration without affecting operant responding maintained by sucrose, and exhibited lack of reinforcing efficacy when tested as a METH's substitute. Neurochemical data showed that RO5203648 did not affect METH-mediated DA efflux and uptake inhibition in striatal synaptosomes. In vivo, however, RO5203648 was able to transiently inhibit METH-induced accumulation of extracellular DA levels in the nucleus accumbens. Taken together, these data highlight the significant potential of TAAR1 to modulate METH's neurochemical and behavioral effects.
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Affiliation(s)
- Rachel Cotter
- Department of Psychology, University of Canterbury Christchurch, New Zealand
| | - Yue Pei
- Department of Psychology, University of Canterbury Christchurch, New Zealand ; Behavioural Neuroscience, School of Psychology, University of Leicester Leicester, UK
| | - Liudmila Mus
- Department of Neuroscience and Brain Technologies, Istituto Italiano di Tecnologia Genoa, Italy
| | - Anja Harmeier
- Neuroscience Research, Pharmaceuticals Division, F. Hoffmann-La Roche Ltd. Basel, Switzerland
| | - Raul R Gainetdinov
- Department of Neuroscience and Brain Technologies, Istituto Italiano di Tecnologia Genoa, Italy ; Skolkovo Institute of Science and Technology Skolkovo, Moscow, Russia ; Faculty of Biology, St. Petersburg State University St. Petersburg, Russia
| | - Marius C Hoener
- Neuroscience Research, Pharmaceuticals Division, F. Hoffmann-La Roche Ltd. Basel, Switzerland
| | - Juan J Canales
- Behavioural Neuroscience, School of Psychology, University of Leicester Leicester, UK
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21
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Mu Y, Ren Z, Jia J, Gao B, Zheng L, Wang G, Friedman E, Zhen X. Inhibition of phosphodiesterase10A attenuates morphine-induced conditioned place preference. Mol Brain 2014; 7:70. [PMID: 25252626 PMCID: PMC4180334 DOI: 10.1186/s13041-014-0070-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 09/12/2014] [Indexed: 12/22/2022] Open
Abstract
Background Phosphodiesterase (PDE) 10A is selectively expressed in medium spiny neurons of the striatum. Nucleus accumbens (NAc) is a key region that mediates drug reward and addiction-related behaviors. To investigate the potential role of PDE10A in the reinforcement properties of morphine, we tested the effect of MP-10, a selective inhibitor of PDE10A, on acquisition, expression, and extinction of morphine-induced conditioned place preference (CPP). Results The results show that 2.5 mg/kg MP-10, administered subcutaneously, significantly inhibited the acquisition of morphine-induced CPP. The same dose of MP-10 alone did not result in the CPP. Moreover, MP-10 did not alter the expression of morphine-induced CPP, but did accelerate the extinction of morphine-induced CPP. Additionally, chronic treatment with 2.5 mg/kg MP-10 decreased expression of phosphorylated CREB (pCREB), activated cAMP response element binding protein, in dorsomedial striatum, in shell of NAc, and in anterior cingulate cortex (ACC) as well as decreased expression of ΔFosB in the shell of NAc and ACC. Conclusion The results suggest that inhibition of PDE10A may have therapeutic potential in the treatment of opioid addiction.
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Pipkin JA, Kaplan GJ, Plant CP, Eaton SE, Gil SM, Zavala AR, Crawford CA. Nicotine exposure beginning in adolescence enhances the acquisition of methamphetamine self-administration, but not methamphetamine-primed reinstatement in male rats. Drug Alcohol Depend 2014; 142:341-4. [PMID: 25042760 PMCID: PMC4127152 DOI: 10.1016/j.drugalcdep.2014.06.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/20/2014] [Accepted: 06/21/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND Nicotine is commonly abused in adolescence and is believed to be a "gateway" to other drugs of abuse [e.g., methamphetamine (METH)]. The relationship between early nicotine exposure and later METH use is complicated because the majority of juvenile smokers continue to use cigarettes into adulthood. Thus, the present investigation examined the individual and combined contribution of adolescent and adult nicotine exposure on METH self-administration. METHODS Forty-three male rats were pretreated with saline or nicotine (0.16 or 0.64 mg/kg, SC) from postnatal day (PD) 35-50. On PD 51, subjects were split into the following groups: SAL-SAL, 0.16-0.16, 0.16-SAL, 0.64-0.64, and 0.64-SAL. Rats were then trained to lever press for METH (0.05 mg/kg) for seven days on an FR1 and seven days on an FR3 reinforcement schedule. After acquisition training, rats underwent 14 days of extinction and were then tested for METH-induced primed reinstatement (1.0mg/kg, IP). RESULTS Data showed that rats receiving continuous injections of the low dose of nicotine (0.16-0.16) obtained more METH infusions versus the control group (SAL-SAL) on an FR1 and FR3 schedule. In addition, rats on the FR3 schedule that received a low dose of nicotine during the adolescent period only (0.16-SAL) had more METH intake than the control group (SAL-SAL). Interestingly, the high dose of nicotine exposure had no effect on METH intake and neither nicotine dose altered METH seeking behavior. CONCLUSIONS Low dose exposure to nicotine during adolescence enhances the reinforcing effects of METH, while heavier exposure has no effect on METH intake.
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Affiliation(s)
- Joseph A. Pipkin
- Department of Psychology, California State University, San Bernardino, 5500 University Parkway, San Bernardino, CA, 92407
| | - Graham J. Kaplan
- Department of Psychology, California State University, San Bernardino, 5500 University Parkway, San Bernardino, CA, 92407
| | - Christopher P. Plant
- Department of Psychology, California State University, San Bernardino, 5500 University Parkway, San Bernardino, CA, 92407
| | - Shannon E. Eaton
- Department of Psychology, California State University, San Bernardino, 5500 University Parkway, San Bernardino, CA, 92407
| | - Susan M. Gil
- Department of Psychology, California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA, 90840
| | - Arturo R. Zavala
- Department of Psychology, California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA, 90840
| | - Cynthia A. Crawford
- Department of Psychology, California State University, San Bernardino, 5500 University Parkway, San Bernardino, CA, 92407
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Hadad NA, Knackstedt LA. Addicted to palatable foods: comparing the neurobiology of Bulimia Nervosa to that of drug addiction. Psychopharmacology (Berl) 2014; 231:1897-912. [PMID: 24500676 PMCID: PMC4484591 DOI: 10.1007/s00213-014-3461-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Accepted: 01/20/2014] [Indexed: 12/18/2022]
Abstract
RATIONALE Bulimia nervosa (BN) is highly comorbid with substance abuse and shares common phenotypic and genetic predispositions with drug addiction. Although treatments for the two disorders are similar, controversy remains about whether BN should be classified as addiction. OBJECTIVES Here, we review the animal and human literature with the goal of assessing whether BN and drug addiction share a common neurobiology. RESULTS Similar neurobiological features are present following administration of drugs and bingeing on palatable food, especially sugar. Specifically, both disorders involve increases in extracellular dopamine (DA), D1 binding, D3 messenger RNA (mRNA), and ΔFosB in the nucleus accumbens (NAc). Animal models of BN reveal increases in ventral tegmental area (VTA) DA and enzymes involved in DA synthesis that resemble changes observed after exposure to addictive drugs. Additionally, alterations in the expression of glutamate receptors and prefrontal cortex activity present in human BN or following sugar bingeing in animals are comparable to the effects of addictive drugs. The two disorders differ in regards to alterations in NAc D2 binding, VTA DAT mRNA expression, and the efficacy of drugs targeting glutamate to treat these disorders. CONCLUSIONS Although additional empirical studies are necessary, the synthesis of the two bodies of research presented here suggests that BN shares many neurobiological features with drug addiction. While few Food and Drug Administration-approved options currently exist for the treatment of drug addiction, pharmacotherapies developed in the future, which target the glutamate, DA, and opioid systems, may be beneficial for the treatment of both BN and drug addiction.
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Affiliation(s)
- Natalie A Hadad
- Department of Psychology, University of Florida, P.O. Box 112250, Gainesville, FL, 32611-2250, USA
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Acute morphine treatments alleviate tremor in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-treated monkeys. PLoS One 2014; 9:e88404. [PMID: 24520383 PMCID: PMC3919785 DOI: 10.1371/journal.pone.0088404] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 01/05/2014] [Indexed: 11/24/2022] Open
Abstract
Parkinson’s disease (PD) is a chronic and progressive neurodegenerative disorder associated with decreased striatal dopamine levels. Morphine has been found to elevate dopamine levels, which indicates a potential therapeutic effect in PD treatment that has not been investigated previously. To evaluate this hypothesis, an investigation of the acute effects of morphine on PD symptoms was carried out in male rhesus PD monkeys that had been induced with MPTP. All MPTP induced monkeys displayed progressive and irreversible PD motor symptoms. The behavioral response of these animals to morphine and L-Dopa were quantified with the Kurlan scale. It was found that L-Dopa alleviated bradykinesia, but did not significantly improve tremor. In contrast, acute morphine alleviated tremor significantly. These results suggested that, compared to L-Dopa, morphine has different therapeutic effects in PD therapy and may act through different biological mechanisms to alleviate PD symptoms.
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Levo-tetrahydropalmatine attenuates the development and expression of methamphetamine-induced locomotor sensitization and the accompanying activation of ERK in the nucleus accumbens and caudate putamen in mice. Neuroscience 2014; 258:101-10. [DOI: 10.1016/j.neuroscience.2013.11.025] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 10/24/2013] [Accepted: 11/12/2013] [Indexed: 11/20/2022]
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Meyer AC, Neugebauer NM, Zheng G, Crooks PA, Dwoskin LP, Bardo MT. Effects of VMAT2 inhibitors lobeline and GZ-793A on methamphetamine-induced changes in dopamine release, metabolism and synthesis in vivo. J Neurochem 2013; 127:187-98. [PMID: 23875705 PMCID: PMC3795981 DOI: 10.1111/jnc.12373] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 06/29/2013] [Accepted: 07/15/2013] [Indexed: 11/29/2022]
Abstract
Vesicular monoamine transporter-2 (VMAT2) inhibitors reduce methamphetamine (METH) reward in rats. The current study determined the effects of VMAT2 inhibitors lobeline (LOB; 1 or 3 mg/kg) and N-(1,2R-dihydroxylpropyl)-2,6-cis-di(4-methoxyphenethyl)piperidine hydrochloride (GZ-793A; 15 or 30 mg/kg) on METH-induced (0.5 mg/kg, SC) changes in extracellular dopamine (DA) and its metabolite dihydroxyphenylacetic acid (DOPAC) in the reward-relevant nucleus accumbens (NAc) shell using in vivo microdialysis. The effect of GZ-793A (15 mg/kg) on DA synthesis in tissue also was investigated in NAc, striatum, medial prefrontal cortex and orbitofrontal cortex. In NAc shell, METH produced a time-dependent increase in extracellular DA and decrease in DOPAC. Neither LOB nor GZ-793A alone altered extracellular DA; however, both drugs increased extracellular DOPAC. In combination with METH, LOB did not alter the effects of METH on DA; however, GZ-793A, which has greater selectivity than LOB for inhibiting VMAT2, reduced the duration of the METH-induced increase in extracellular DA. Both LOB and GZ-793A enhanced the duration of the METH-induced decrease in extracellular DOPAC. METH also increased tissue DA synthesis in NAc and striatum, whereas GZ-793A decreased synthesis; no effect of METH or GZ-793A on DA synthesis was found in medial prefrontal cortex or orbitofrontal cortex. These results suggest that selective inhibition of VMAT2 produces a time-dependent decrease in DA release in NAc shell as a result of alterations in tyrosine hydroxylase activity, which may play a role in the ability of GZ-793A to decrease METH reward.
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Affiliation(s)
- Andrew C. Meyer
- Department of Psychiatry, University of Vermont, Burlington, VT 05401, USA
| | - Nichole M. Neugebauer
- Department of Psychiatry and Behavioral Neurosciences, University of Chicago, Chicago, IL 60637, USA
| | - Guangrong Zheng
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Peter A. Crooks
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Linda P. Dwoskin
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, KY 40536, USA
| | - Michael T. Bardo
- Department of Psychology, University of Kentucky, Lexington, KY 40536, USA
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Abstract
This paper is the thirty-fourth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2011 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 (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration (Section 16); and immunological responses (Section 17).
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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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Hutchinson AJ, Hudson RL, Dubocovich ML. Genetic deletion of MT(1) and MT(2) melatonin receptors differentially abrogates the development and expression of methamphetamine-induced locomotor sensitization during the day and the night in C3H/HeN mice. J Pineal Res 2012; 53:399-409. [PMID: 22672659 PMCID: PMC3568497 DOI: 10.1111/j.1600-079x.2012.01010.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This study explored the role of the melatonin receptors in methamphetamine (METH)-induced locomotor sensitization during the light and dark phases in C3H/HeN mice with genetic deletion of the MT(1) and/or MT(2) melatonin receptors. Six daily treatments with METH (1.2 mg/kg, i.p.) in a novel environment during the light phase led to the development of locomotor sensitization in wild-type (WT), MT(1)KO and MT(2)KO mice. Following four full days of abstinence, METH challenge (1.2 mg/kg, i.p.) triggered the expression of locomotor sensitization in METH-pretreated but not in vehicle (VEH)-pretreated mice. In MT(1)/MT(2)KO mice, the development of sensitization during the light phase was significantly reduced and the expression of sensitization was completely abrogated upon METH challenge. During the dark phase the development of locomotor sensitization in METH-pretreated WT, MT(1)KO and MT(2)KO mice was statistically different from VEH-treated controls. However, WT and MT(2)KO, but not MT(1)KO mice receiving repeated VEH pretreatments during the dark phase expressed a sensitized response to METH challenge that is of an identical magnitude to that observed upon 6 days of METH pretreatment. We conclude that exposure to a novel environment during the dark phase, but not during the light phase, facilitated the expression of sensitization to a METH challenge in a manner dependent on MT(1) melatonin receptor activation by endogenous melatonin. We suggest that MT(1) and MT(2) melatonin receptors are potential targets for pharmacotherapeutic intervention in METH abusers.
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MESH Headings
- Animals
- Behavior, Animal/drug effects
- Behavior, Animal/radiation effects
- Central Nervous System/drug effects
- Central Nervous System/metabolism
- Central Nervous System/radiation effects
- Central Nervous System Sensitization/drug effects
- Central Nervous System Sensitization/radiation effects
- Central Nervous System Stimulants/pharmacology
- Gene Deletion
- Male
- Melatonin/metabolism
- Methamphetamine/pharmacology
- Mice
- Mice, Inbred C3H
- Mice, Knockout
- Motor Activity/drug effects
- Motor Activity/radiation effects
- Photoperiod
- Receptor, Melatonin, MT1/deficiency
- Receptor, Melatonin, MT1/genetics
- Receptor, Melatonin, MT2/deficiency
- Receptor, Melatonin, MT2/genetics
- Time Factors
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Affiliation(s)
- Anthony J. Hutchinson
- Department of Pharmacology and Toxicology, School of Medicine and Biomedical Sciences. University at Buffalo (SUNY), Buffalo, NY, USA
| | - Randall L. Hudson
- Department of Physiology and Biophysics, School of Medicine and Biomedical Sciences. University at Buffalo (SUNY), Buffalo, NY, USA
| | - Margarita L. Dubocovich
- Department of Pharmacology and Toxicology, School of Medicine and Biomedical Sciences. University at Buffalo (SUNY), Buffalo, NY, USA
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Niu H, Zheng Y, Huma T, Rizak JD, Li L, Wang G, Ren H, Xu L, Yang J, Ma Y, Lei H. Lesion of olfactory epithelium attenuates expression of morphine-induced behavioral sensitization and reinstatement of drug-primed conditioned place preference in mice. Pharmacol Biochem Behav 2012; 103:526-34. [PMID: 23103203 DOI: 10.1016/j.pbb.2012.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 09/21/2012] [Accepted: 10/17/2012] [Indexed: 10/27/2022]
Abstract
Previous studies have shown that olfactory impairment by disrupting the olfactory epithelium prior to morphine administration attenuated the development addiction-related behaviors. However, it is unclear whether olfactory impairment will affect the expression of already established addiction-related behaviors. To address this issue, mice were conditioned with morphine to induce behavioral sensitization and condition placed preference (CPP). After an abstinence period, the animals were subjected to either an intranasal ZnSO(4) effusion (ZnE) or sham treatment with saline. Behavioral sensitization and CPP reinstatement were evaluated 24h later, as well as the expression of c-Fos protein, a marker of activated neural sites, in brain regions of interest. It was found that ZnE treatment attenuated morphine-induced behavioral sensitization and reinstatement of CPP. Compared to the saline-treated ones, the ZnE-treated animals showed reduced c-Fos expression in the nucleus accumbens (NAc) associated with behavioral sensitization, and in the NAc, cingulate cortex, dentate gyrus, amygdala, lateral hypothalamus and ventral tegmental area associated with CPP reinstatement. Together, these results demonstrated that acute olfactory impairment could attenuate already established addiction-related behaviors and expression of c-Fos in drug addiction related brain regions, perhaps by affecting the coordination between reward and motivational systems in the brain.
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Affiliation(s)
- Haichen Niu
- Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 43007, PR China
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30
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Rezayof A, Assadpour S, Alijanpour S. Morphine-induced anxiolytic-like effect in morphine-sensitized mice: involvement of ventral hippocampal nicotinic acetylcholine receptors. Pharmacol Biochem Behav 2012; 103:460-6. [PMID: 23067878 DOI: 10.1016/j.pbb.2012.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2012] [Revised: 10/01/2012] [Accepted: 10/06/2012] [Indexed: 10/27/2022]
Abstract
In the present study, the effects of repeated intra-ventral hippocampal (intra-VH) microinjections of nicotinic acetylcholine receptor agonist or antagonist on morphine-induced anxiolytic-like behavior were investigated in morphine-sensitized mice using elevated plus-maze. Intraperitoneal (i.p.) administration of different doses of morphine (5, 7.5 and 10mg/kg) increased the percentage of open arm time (%OAT), open arm entries (%OAE), but not locomotor activity, indicating an anxiolytic-like response to morphine. The maximum response was obtained by 7.5mg/kg of the opioid. The anxiety-like behavior which was induced by a lower dose of morphine (5mg/kg) was significantly increased in mice that had previously received once daily injections of morphine (10 and 20mg/kg, i.p.) for 3 days. It should be considered that this treatment also increased locomotor activity in morphine-sensitized mice. Furthermore, the response to an ineffective dose of morphine (5mg/kg, i.p.) in the EPM was significantly increased in the animals that had previously received nicotine for 3 days (0.1, 0.3, 0.5 and 0.7 μg/mouse; intra-VH), 5 min prior to the injections of morphine (5mg/kg/day × 3 days; i.p.). On the other hand, the increase of morphine-induced anxiolytic-like effect in animals that had previously received the 3-day morphine (20mg/kg) was dose dependently suppressed by once daily injections of mecamylamine (0.5, 1 and 2 μg/mouse/day × 3 days; intra-VH). It is important to note that repeated intra-VH administrations of the same doses of nicotine or mecamylamine alone caused no significant change in morphine (5mg/kg)-induced anxiety-like parameters in the EPM. In conclusion, it seems that morphine sensitization affects the anxiety-like behavior in the EPM and the cholinergic system in the ventral hippocampus, via nicotinic receptors, may play an important role in this effect.
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Affiliation(s)
- Ameneh Rezayof
- Department of Animal Biology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.
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31
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Berry JN, Neugebauer NM, Bardo MT. Reinstatement of methamphetamine conditioned place preference in nicotine-sensitized rats. Behav Brain Res 2012; 235:158-65. [PMID: 22884606 DOI: 10.1016/j.bbr.2012.07.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 07/03/2012] [Accepted: 07/29/2012] [Indexed: 10/28/2022]
Abstract
The current experiments examined the effects of repeated nicotine prior to acquisition, extinction, and reinstatement of methamphetamine-induced conditioned place preference (CPP). Methamphetamine-induced (METH; 0.25, 0.5, or 1 mg/kg, s.c.) CPP was established using separate groups of adult male Sprague-Dawley rats with an unbiased conditioning procedure. Following extinction of METH CPP, drug-primed reinstatement (0, 0.25, 0.5 or 1 mg/kg, s.c.) of METH CPP was assessed in order to determine whether METH-induced reinstatement depends on the METH dose used to induce CPP. In a second experiment, separate groups of rats received nicotine (NIC; 0 or 0.2 mg/kg, s.c.) for 7 days prior to undergoing METH (0 or 0.5 mg/kg, s.c.) conditioning, extinction, and drug-primed reinstatement. Results indicate that METH-primed reinstatement varied as a function of dose such that priming with the conditioning dose did not reinstate CPP, but reinstatement was observed following priming doses of METH that were either lower or higher than the conditioning dose. Prior NIC exposure had no effect on METH CPP, extinction, or reinstatement. Interestingly, at a METH dose (0.5 mg/kg) that did not induce reinstatement alone, acute NIC (0.2 mg/kg) in combination with METH induced reinstatement, suggesting that NIC produced a leftward shift in the dose-response effect of METH to reinstate CPP. These studies indicate that prior NIC exposure may not be necessary for enhancement of the rewarding effects of METH, in contrast to previous self-administration reports.
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Affiliation(s)
- Jennifer N Berry
- University of Kentucky, Department of Psychology, Spinal Cord and Brain Injury Research Center, B449 Biomedical and Biological Sciences Research Building, 741 S. Limestone St., Lexington, KY 40536-0509, United States
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Sani G, Serra G, Kotzalidis GD, Romano S, Tamorri SM, Manfredi G, Caloro M, Telesforo CL, Caltagirone SS, Panaccione I, Simonetti A, Demontis F, Serra G, Girardi P. The role of memantine in the treatment of psychiatric disorders other than the dementias: a review of current preclinical and clinical evidence. CNS Drugs 2012; 26:663-90. [PMID: 22784018 DOI: 10.2165/11634390-000000000-00000] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Memantine, a non-competitive NMDA receptor antagonist approved for Alzheimer's disease with a good safety profile, is increasingly being studied in a variety of non-dementia psychiatric disorders. We aimed to critically review relevant literature on the use of the drug in such disorders. We performed a PubMed search of the effects of memantine in animal models of psychiatric disorders and its effects in human studies of specific psychiatric disorders. The bulk of the data relates to the effects of memantine in major depressive disorder and schizophrenia, although more recent studies have provided data on the use of the drug in bipolar disorder as an add-on. Despite interesting preclinical data, results in major depression are not encouraging. Animal studies investigating the possible usefulness of memantine in schizophrenia are controversial; however, interesting findings were obtained in open studies of schizophrenia, but negative placebo-controlled, double-blind studies cast doubt on their validity. The effects of memantine in anxiety disorders have been poorly investigated, but data indicate that the use of the drug in obsessive-compulsive disorder and post-traumatic stress disorder holds promise, while findings relating to generalized anxiety disorder are rather disappointing. Results in eating disorders, catatonia, impulse control disorders (pathological gambling), substance and alcohol abuse/dependence, and attention-deficit hyperactivity disorder are inconclusive. In most psychiatric non-Alzheimer's disease conditions, the clinical data fail to support the usefulness of memantine as monotherapy or add-on treatment However, recent preclinical and clinical findings suggest that add-on memantine may show antimanic and mood-stabilizing effects in treatment-resistant bipolar disorder.
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Affiliation(s)
- Gabriele Sani
- NeSMOS Department (Neurosciences, Mental Health, and Sensory Organs), School of Medicine and Psychology, Sapienza University, UOC Psychiatry, SantAndrea Hospital, Rome, Italy.
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Gonçalves J, Ribeiro CF, Malva JO, Silva AP. Protective role of neuropeptide Y Y2receptors in cell death and microglial response following methamphetamine injury. Eur J Neurosci 2012; 36:3173-83. [DOI: 10.1111/j.1460-9568.2012.08232.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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34
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Overexpression of VMAT-2 and DT-diaphorase protects substantia nigra-derived cells against aminochrome neurotoxicity. Biochim Biophys Acta Mol Basis Dis 2012; 1822:1125-36. [PMID: 22483869 DOI: 10.1016/j.bbadis.2012.03.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/16/2012] [Accepted: 03/20/2012] [Indexed: 12/31/2022]
Abstract
We tested the hypothesis that both VMAT-2 and DT-diaphorase are an important cellular defense against aminochrome-dependent neurotoxicity during dopamine oxidation. A cell line with VMAT-2 and DT-diaphorase over-expressed was created. The transfection of RCSN-3 cells with a bicistronic plasmid coding for VMAT-2 fused with GFP-IRES-DT-diaphorase cDNA induced a significant increase in protein expression of VMAT-2 (7-fold; P<0.001) and DT-diaphorase (9-fold; P<0.001), accompanied by a 4- and 5.5-fold significant increase in transport and enzyme activity, respectively. Studies with synaptic vesicles from rat substantia nigra revealed that VMAT-2 uptake of ³H-aminochrome 6.3 ± 0.4nmol/min/mg was similar to dopamine uptake 6.2 ± 0.3nmol/min/mg that which were dependent on ATP. Interestingly, aminochrome uptake was inhibited by 2μM lobeline but not reserpine (1 and 10μM). Incubation of cells overexpressing VMAT-2 and DT-diaphorase with 20μM aminochrome resulted in (i) a significant decrease in cell death (6-fold, P<0.001); (ii) normal ultra structure determined by transmission electron microscopy contrasting with a significant increase of autophagosome and a dramatic remodeling of the mitochondrial inner membrane in wild type cells; (iii) normal level of ATP (256 ± 11μM) contrasting with a significant decrease in wild type cells (121±11μM, P<0.001); and (iv) a significant decrease in DNA laddering (21 ± 8pixels, P<0.001) cells in comparison with wild type cells treated with 20μM aminochrome (269 ± 9). These results support our hypothesis that VMAT-2 and DT-diaphorase are an important defense system against aminochrome formed during dopamine oxidation.
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