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Doyle MR, Beltran NM, Bushnell MSA, Syed M, Acosta V, Desai M, Rice KC, Serafine KM, Gould GG, Daws LC, Collins GT. Effects of access condition on substance use disorder-like phenotypes in male and female rats self-administering MDPV or cocaine. Drug Alcohol Depend 2024; 263:112408. [PMID: 39141975 DOI: 10.1016/j.drugalcdep.2024.112408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 07/23/2024] [Accepted: 08/06/2024] [Indexed: 08/16/2024]
Abstract
Substance use disorder (SUD) is a heterogeneous disorder, where severity, symptoms, and patterns of use vary across individuals. Yet, when rats self-administer cocaine under short-access conditions, their behavior tends to be well-regulated, though individual differences can emerge with long- or intermittent-access. In contrast, significant individual differences emerge when rats self-administer 3,4-methylenedioxypyrovalerone (MDPV), even under short-access conditions, wherein ~30 % of rats exhibit high levels of drug-taking. This study assessed SUD-like phenotypes of male and female rats self-administering MDPV or cocaine by comparing level of drug intake, responding during periods of signaled drug unavailability, and sensitivity to footshock punishment to determine whether: (1) under short-access conditions, rats that self-administer MDPV will exhibit a more robust SUD-like phenotype than rats that self-administer cocaine; (2) female rats will have a more severe phenotype than male rats; and (3) compared to short-access, long- and intermittent-access to MDPV or cocaine self-administration will result in a more robust SUD-like phenotype. Compared to cocaine, rats that self-administered MDPV exhibited a more severe phenotype, even under short-access conditions. Long- and intermittent-access to cocaine and MDPV temporarily altered drug-taking patterns but did not systematically change SUD-like phenotypes. Behavioral and quantitative autoradiography studies suggest phenotypic differences are not due to expression of dopamine transporter, dopamine D2 or D3 receptors, or 5-HT1B, 5-HT2A, or 5-HT2C receptors. This study suggests individuals who use synthetic cathinones may be at greater risk for developing a SUD, and short-access MDPV self-administration may provide a useful method to study the transition to disordered substance use in humans.
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Affiliation(s)
- Michelle R Doyle
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Nina M Beltran
- Department of Psychology, University of Texas at El Paso, El Paso, TX, USA
| | - Mark S A Bushnell
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Maaz Syed
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Valeria Acosta
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Marisa Desai
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Kenner C Rice
- Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, MD, USA
| | | | - Georgianna G Gould
- Department of Cellular and Integrative Physiology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Lynette C Daws
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA; Department of Cellular and Integrative Physiology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Gregory T Collins
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA; South Texas Veterans Health Care System, San Antonio, TX, USA.
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Bassi M, Bilel S, Tirri M, Corli G, Di Rosa F, Gregori A, Alkilany AM, Rachid O, Roda E, De Luca F, Papa P, Buscaglia E, Zauli G, Locatelli CA, Marti M. The synthetic cathinones MDPHP and MDPV: Comparison of the acute effects in mice, in silico ADMET profiles and clinical reports. Neurotoxicology 2024; 103:230-255. [PMID: 38955288 DOI: 10.1016/j.neuro.2024.06.014] [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: 03/26/2024] [Revised: 06/17/2024] [Accepted: 06/26/2024] [Indexed: 07/04/2024]
Abstract
The 3,4-methylenedioxy-alpha-pyrrolidinohexanophenone (MDPHP) is a synthetic cathinone closely related to 3,4-methylenedioxypyrovalerone (MDPV), one of the most common synthetic cathinones present in the "bath salts". MDPHP has recently gained attention due to increasing seizures and involvement in human intoxications which occurred in Europe and Italy in the last years, but currently there is a lack of information about its pharmaco-toxicological effects. With the aim at filling this gap, the present study is endeavoured to (i) evaluate the effects of acute administration of MDPHP (0.01-20 mg/kg; i.p.) on behaviour, cardiorespiratory and cardiovascular parameters in CD-1 male mice, comparing them to those observed after administration of MDPV; (ii) predict the ADMET profile of the two analogues using the Plus ADMET Predictor®; (iii) present clinical data related to MDPHP and MDPV-induced intoxications recorded between 2011 and 2023 by the Pavia Poison Control Centre (PCC) - National Toxicology Information Centre (Istituti Clinici Scientifici Maugeri, IRCCS Pavia, Italy). Our results substantiated that MDPHP and MDPV similarly affect sensorimotor and behavioural responses in mice, importantly increased locomotion and induced aggressive behaviour, and, at higher dosage, increased heart rate and blood pressure. These findings are in line with those observed in humans, revealing severe toxidromes typically characterized by Central Nervous System (CNS) alterations (behavioural/neuropsychiatric symptoms), including psychomotor agitation and aggressiveness, cardiovascular and respiratory disorders (e.g. tachycardia, hypertension, dyspnoea), and other peripheral symptoms (e.g. hyperthermia, acidosis, rhabdomyolysis).
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Affiliation(s)
- Marta Bassi
- Department of Translational Medicine, Section of Legal Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Sabrine Bilel
- Department of Translational Medicine, Section of Legal Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Micaela Tirri
- Department of Translational Medicine, Section of Legal Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Giorgia Corli
- Department of Translational Medicine, Section of Legal Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Fabiana Di Rosa
- Department of Scientific Investigation (RIS), Carabinieri, Rome 00191, Italy
| | - Adolfo Gregori
- Department of Scientific Investigation (RIS), Carabinieri, Rome 00191, Italy
| | - Alaaldin M Alkilany
- Department of Pharmaceutical Sciences, College of Pharmacy, QU Health, Qatar University, Qatar
| | - Ousama Rachid
- Department of Pharmaceutical Sciences, College of Pharmacy, QU Health, Qatar University, Qatar
| | - Elisa Roda
- Laboratory of Clinical & Experimental Toxicology, Pavia Poison Centre, National Toxicology Information Centre, Toxicology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Pavia, Italy
| | - Fabrizio De Luca
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Pavia 27100, Italy
| | - Pietro Papa
- Laboratory of Analytical Toxicology-Clinical Chemistry, IRCCS Fondazione Policlinico S. Matteo, Pavia, Italy
| | - Eleonora Buscaglia
- Laboratory of Clinical & Experimental Toxicology, Pavia Poison Centre, National Toxicology Information Centre, Toxicology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Pavia, Italy
| | - Giorgio Zauli
- Research Department, King Khaled Eye Specialistic Hospital, Riyadh, Saudi Arabia
| | - Carlo Alessandro Locatelli
- Laboratory of Clinical & Experimental Toxicology, Pavia Poison Centre, National Toxicology Information Centre, Toxicology Unit, Istituti Clinici Scientifici Maugeri, IRCCS, Pavia, Italy
| | - Matteo Marti
- Department of Translational Medicine, Section of Legal Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy; Department of Anti-Drug Policies, Collaborative Center for the Italian National Early Warning System, Presidency of the Council of Ministers, Ferrara, Italy.
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Doyle MR, Beltran NM, Bushnell MSA, Syed M, Acosta V, Desai M, Rice KC, Serafine KM, Gould GG, Daws LC, Collins GT. Effects of access condition on substance use disorder-like phenotypes in male and female rats self-administering MDPV or cocaine. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.04.583431. [PMID: 38496609 PMCID: PMC10942381 DOI: 10.1101/2024.03.04.583431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Substance use disorder (SUD) is a heterogeneous disorder, where severity, symptoms, and patterns of substance use vary across individuals. Yet, when rats are allowed to self-administer drugs such as cocaine under short-access conditions, their behavior tends to be well-regulated and homogeneous in nature; though individual differences can emerge when rats are provided long- or intermittent-access to cocaine. In contrast to cocaine, significant individual differences emerge when rats are allowed to self-administer 3,4-methylenedioxypyrovalerone (MDPV), even under short-access conditions, wherein ~30% of rats rapidly transition to high levels of drug-taking. This study assessed the SUD-like phenotypes of male and female Sprague Dawley rats self-administering MDPV (0.032 mg/kg/infusion) or cocaine (0.32 mg/kg/infusion) by comparing level of drug intake, responding during periods of signaled drug unavailability, and sensitivity to footshock punishment to test the hypotheses that: (1) under short-access conditions, rats that self-administer MDPV will exhibit a more robust SUD-like phenotype than rats that self-administered cocaine; (2) female rats will have a more severe phenotype than male rats; and (3) compared to short-access, long- and intermittent-access to MDPV or cocaine self-administration will result in a more robust SUD-like phenotype. After short-access, rats that self-administered MDPV exhibited a more severe phenotype than rats that self-administered cocaine. Though long- and intermittent-access to cocaine and MDPV self-administration altered drug-taking patterns, manipulating access conditions did not systematically alter their SUD-like phenotype. Evidence from behavioral and quantitative autoradiography studies suggest that these differences are unlikely due to changes in expression levels of dopamine transporter, dopamine D2 or D3 receptors, or 5-HT1B, 5-HT2A, or 5-HT2C receptors, though these possibilities cannot be ruled out. These results show that the phenotype exhibited by rats self-administering MDPV differs from that observed for rats self-administering cocaine, and suggests that individuals that use MDPV and/or related cathinones may be at greater risk for developing a SUD, and that short-access MDPV self-administration may provide a useful method to understand the factors that mediate the transition to problematic or disordered substance use in humans.
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Affiliation(s)
- Michelle R. Doyle
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Nina M. Beltran
- Department of Psychology, University of Texas at El Paso, El Paso, TX, USA
| | - Mark S. A. Bushnell
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Maaz Syed
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Valeria Acosta
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Marisa Desai
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Kenner C. Rice
- Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, MD
| | | | - Georgianna G. Gould
- Department of Cellular and Integrative Physiology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Lynette C. Daws
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
- Department of Cellular and Integrative Physiology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Gregory T. Collins
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
- South Texas Veterans Health Care System, San Antonio, TX, USA
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Nagy EK, Leyrer-Jackson JM, Hood LE, Acuña AM, Olive MF. Effects of repeated binge intake of the pyrovalerone cathinone derivative 3,4-methylenedioxypyrovalerone on prefrontal cytokine levels in rats - a preliminary study. Front Behav Neurosci 2023; 17:1275968. [PMID: 38025384 PMCID: PMC10668493 DOI: 10.3389/fnbeh.2023.1275968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/12/2023] [Indexed: 12/01/2023] Open
Abstract
Drugs of abuse activate neuroimmune signaling in addiction-related regions of the brain, including the prefrontal cortex (PFC) which mediates executive control, attention, and behavioral inhibition. Traditional psychostimulants including methamphetamine and cocaine are known to induce PFC inflammation, yet the effects of synthetic cathinone derivatives are largely unexplored. In this study, we examined the ability of repeated binge-like intake of the pyrovalerone cathinone derivative 3,4-methylenedioxypyrovalerone (MDPV) to alter cytokine profiles in the PFC. Male and female rats were allowed to intravenously self-administer MDPV (0.05 mg/kg/infusion) or saline as a control under conditions of prolonged binge-like access, consisting of three 96 h periods of drug access interspersed with 72 h of forced abstinence. Three weeks following cessation of drug availability, PFC cytokine levels were assessed using antibody arrays. Employing the unsupervised clustering and regression analysis tool CytoMod, a single module of co-signaling cytokines associated with MDPV intake regardless of sex was identified. With regards to specific cytokines, MDPV intake was positively associated with PFC levels of VCAM-1/CD106 and negatively associated with levels of Flt-3 ligand. These findings indicate that prolonged MDPV intake causes changes in PFC cytokine levels that persist into abstinence; however, the functional ramifications of these changes remain to be fully elucidated.
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Affiliation(s)
- Erin K. Nagy
- Department of Psychology, Behavioral Neuroscience and Comparative Psychology Area, Arizona State University, Tempe, AZ, United States
| | - Jonna M. Leyrer-Jackson
- Department of Medical Education, School of Medicine, Creighton University, Phoenix, AZ, United States
| | - Lauren E. Hood
- Department of Psychology, Behavioral Neuroscience and Comparative Psychology Area, Arizona State University, Tempe, AZ, United States
| | - Amanda M. Acuña
- Department of Psychology, Behavioral Neuroscience and Comparative Psychology Area, Arizona State University, Tempe, AZ, United States
- Interdisciplinary Graduate Program in Neuroscience, School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - M. Foster Olive
- Department of Psychology, Behavioral Neuroscience and Comparative Psychology Area, Arizona State University, Tempe, AZ, United States
- Interdisciplinary Graduate Program in Neuroscience, School of Life Sciences, Arizona State University, Tempe, AZ, United States
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Manke HN, Nunn SS, Sulima A, Rice KC, Riley AL. Effects of Serial Polydrug Use on the Rewarding and Aversive Effects of the Novel Synthetic Cathinone Eutylone. Brain Sci 2023; 13:1294. [PMID: 37759895 PMCID: PMC10526358 DOI: 10.3390/brainsci13091294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/31/2023] [Accepted: 09/02/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND As individual synthetic cathinones become scheduled and regulated by the Drug Enforcement Administration (DEA), new ones regularly are produced and distributed. One such compound is eutylone, a novel third-generation synthetic cathinone whose affective properties (and abuse potential) are largely unknown. The following experiments begin to characterize these effects and how they may be impacted by drug history (a factor affecting reward/aversion for other drugs of abuse). METHODS Eutylone was assessed for its ability to induce conditioned taste avoidance (CTA; aversive effect) and conditioned place preference (CPP; rewarding effect) and their relationship (Experiment 1). Following this, the effects of exposure to cocaine or 3,4-methylenedioxymethamphetamine [MDMA] on eutylone's affective properties were investigated (Experiment 2). RESULTS Eutylone produced dose-dependent CTA and CPP (Experiment 1), and these endpoints were unrelated. Pre-exposure to cocaine and MDMA differentially impacted taste avoidance induced by eutylone (MDMA > cocaine) and did not impact eutylone-induced place preference. CONCLUSIONS These data indicate that eutylone, like other synthetic cathinones, has co-occurring, independent rewarding and aversive effects that may contribute to its abuse potential and that these effects are differentially impacted by drug history. Although these studies begin the characterization of eutylone, future studies should examine the impact of other factors on eutylone's affective properties and its eventual reinforcing effects (i.e., intravenous self-administration [IVSA]) to predict its use and abuse liability.
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Affiliation(s)
- Hayley N. Manke
- Psychopharmacology Laboratory, Center for Neuroscience and Behavior, Department of Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA; (H.N.M.)
| | - Samuel S. Nunn
- Psychopharmacology Laboratory, Center for Neuroscience and Behavior, Department of Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA; (H.N.M.)
| | - Agnieszka Sulima
- Drug Design and Synthesis Section, National Institute on Drug Abuse (NIDA), National Institute on Alcohol Abuse and Alcoholism (NIAAA), Bethesda, MD 20892, USA (K.C.R.)
| | - Kenner C. Rice
- Drug Design and Synthesis Section, National Institute on Drug Abuse (NIDA), National Institute on Alcohol Abuse and Alcoholism (NIAAA), Bethesda, MD 20892, USA (K.C.R.)
| | - Anthony L. Riley
- Psychopharmacology Laboratory, Center for Neuroscience and Behavior, Department of Neuroscience, American University, 4400 Massachusetts Ave, NW, Washington, DC 20016, USA; (H.N.M.)
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Doyle MR, Peng LN, Cao J, Rice KC, Newman AH, Collins GT. 3,4-Methylenedioxypyrovalerone High-Responder Phenotype as a Tool to Evaluate Candidate Medications for Stimulant Use Disorder. J Pharmacol Exp Ther 2023; 384:353-362. [PMID: 36627204 PMCID: PMC9976791 DOI: 10.1124/jpet.122.001419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/02/2022] [Accepted: 12/13/2022] [Indexed: 01/12/2023] Open
Abstract
Despite decades of research, there are no medications approved by the United States Food and Drug Administration to treat stimulant use disorders. Self-administration procedures are widely used to screen candidate medications for stimulant use disorder, although preclinical reductions in stimulant self-administration have not translated to meaningful reductions in stimulant use in humans. One possible reason for this discordance is that most preclinical studies evaluate candidate medications under conditions that promote predictable, and well-regulated patterns of drug-taking rather than the dysregulated and/or compulsive patterns of drug-taking characteristic of a stimulant use disorder. A subset of rats ("high-responders") that self-administer 3,4-methelyendioxypyrovalerone (MDPV), a monoamine uptake inhibitor, develop high levels of dysregulated drug-taking consistent with behaviors related to stimulant use disorders. Because MDPV acts on dopamine, serotonin (5-HT), and sigma receptor systems, the current studies compared the potency and effectiveness of a dopamine D3 receptor partial agonist (VK4-40) or antagonist (VK4-116), a sigma receptor antagonist (BD1063), a dopamine D2/D3/sigma receptor antagonist (haloperidol), and a 5-HT2C receptor agonist (CP-809,101) to reduce MDPV (0.0032-0.1 mg/kg/infusion) self-administration in high- and low-responding rats as well as rats self-administering cocaine (0.032-1 mg/kg/infusion). VK4-40, VK4-116, haloperidol, and CP-809,101 were equipotent and effective at reducing drug-taking in all three groups of rats, including the high-responders; however, VK4-116 and CP-809,101 were less potent at reducing drug-taking in female compared with male rats. Together, these studies suggest that drugs targeting dopamine D3 or 5-HT2C receptors can effectively reduce dysregulated patterns of stimulant use, highlighting their potential utility for treating stimulant use disorders. SIGNIFICANCE STATEMENT: There are no United States Food and Drug Administration-approved treatments for stimulant use disorder, perhaps in part because candidate medications are most often evaluated in preclinical models using male subjects with well-regulated drug-taking. In an attempt to better model aberrant drug taking, this study found compounds acting at dopamine D3 or 5-HT2C receptors can attenuate drug-taking in male and female rats that self-administered two different stimulants and exhibited either a high or low substance use disorder-like phenotype.
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Affiliation(s)
- Michelle R Doyle
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., L.N.P., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, Baltimore, Maryland (J.C., A.H.N.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, Maryland (K.C.R.)
| | - Lindsey N Peng
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., L.N.P., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, Baltimore, Maryland (J.C., A.H.N.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, Maryland (K.C.R.)
| | - Jianjing Cao
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., L.N.P., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, Baltimore, Maryland (J.C., A.H.N.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, Maryland (K.C.R.)
| | - Kenner C Rice
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., L.N.P., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, Baltimore, Maryland (J.C., A.H.N.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, Maryland (K.C.R.)
| | - Amy Hauck Newman
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., L.N.P., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, Baltimore, Maryland (J.C., A.H.N.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, Maryland (K.C.R.)
| | - Gregory T Collins
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., L.N.P., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse - Intramural Research Program, Baltimore, Maryland (J.C., A.H.N.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism - Intramural Research Program, Bethesda, Maryland (K.C.R.)
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7
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Doyle MR, Sulima A, Rice KC, Collins GT. Influence of Contingent and Noncontingent Drug Histories on the Development of High Levels of MDPV Self-Administration. J Pharmacol Exp Ther 2021; 379:108-116. [PMID: 34413199 DOI: 10.1124/jpet.121.000655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/16/2021] [Indexed: 11/22/2022] Open
Abstract
A subset of rats that self-administer 3,4-methylenedioxypyrovalerone (MDPV) develop unusually high levels of drug taking. A history of responding maintained by cocaine, but not food, prevents the development of this high-responder phenotype; however, it is unclear how histories of noncontingent cocaine exposure or self-administering drugs from other pharmacological classes would affect its development. In the current studies, 5 groups of male Sprague-Dawley rats were used to determine whether histories of responding maintained by drugs from different pharmacological classes (e.g., MDPV, cocaine, fentanyl, nicotine, or ketamine) would differentially impact the development of the high-responder phenotype when MDPV was available for self-administration. Two additional groups were used to determine whether noncontingent exposure to cocaine would prevent the development of the high-responder phenotype when MDPV was available for self-administration, and whether noncontingent exposure to MDPV would facilitate the development of the high-responder phenotype when cocaine was available for self-administration. Consistent with previous reports, a history of response-contingent cocaine, and to a lesser extent noncontingent cocaine, prevented the MDPV high-responder phenotype; however, when responding was initially maintained by fentanyl, nicotine, or ketamine, the MDPV high-responder phenotype developed in ∼45% of rats. By manipulating behavioral and pharmacological histories prior to evaluating MDPV self-administration, the current studies provide additional evidence that a history of response-contingent (or noncontingent) cocaine can prevent the transition from well regulated to aberrant drug-taking when responding is maintained by MDPV. Although the mechanism(s) that underlies this novel high-responder phenotype are unknown, elucidation may provide insight into individual differences relating to substance use disorder. SIGNIFICANCE STATEMENT: A subset of outbred Sprague-Dawley rats self-administer high levels of the synthetic cathinone 3,4-methylenedioxypyrovalerone (MDPV). Understanding the behavioral and/or pharmacological factors that can prevent the development of dysregulated MDPV self-administration may provide insight into individual differences in vulnerability to develop a substance use disorder.
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Affiliation(s)
- Michelle R Doyle
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
| | - Agnieszka Sulima
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
| | - Kenner C Rice
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
| | - Gregory T Collins
- Department of Pharmacology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas (M.R.D., G.T.C.); South Texas Veterans Health Care System, San Antonio, Texas (M.R.D., G.T.C.); and Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch, NIDA and NIAAA, Bethesda, Maryland (A.S., K.C.R.)
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