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Beliveau CM, McMahan VM, Arenander J, Angst MS, Kushel M, Torres A, Santos GM, Coffin PO. Stimulant use for self-management of pain among safety-net patients with chronic non-cancer pain. Subst Abus 2022; 43:179-186. [PMID: 33798030 PMCID: PMC8791072 DOI: 10.1080/08897077.2021.1903654] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Chronic pain affects one-fifth of US adults. Reductions in opioid prescribing have been associated with increased non-prescription opioid use and, chronologically, increased stimulant (methamphetamine and cocaine) use. While non-prescription opioid use is commonly attributed to pain self-management, the role of stimulants in managing pain is unclear. METHODS We analyzed baseline data from a longitudinal study of patients with chronic non-cancer pain in an urban safety-net healthcare system who had been prescribed an opioid for ≥3 of the last 12 months, and had a history of non-prescription opioid, cocaine, or amphetamine use (N = 300). We estimated the prevalence and identified correlates of stimulant use to treat pain among a subgroup of patients who reported past-year stimulant use (N = 105). Data sources included computer-assisted questionnaire (demographics, substance use, pain), clinical exam and procedures (pain, pain tolerance), and chart abstraction (opioid prescriptions). We conducted bivariate analyses to assess associations between demographics, pain characteristics, non-opioid therapies, substance use, opioid prescriptions, and self-reported symptoms, with reporting using stimulants to treat pain. Demographic variables and those with significant bivariate associations were included in a multivariable logistic regression model. RESULTS Fifty-two percent of participants with past-year stimulant use reported using stimulants in the past year to treat pain. Participants who used stimulants for pain reported slightly higher average pain in the past 3 months (median of 8 (IQR: 6-8) vs 7 (7-9) out of 10, p = 0.049). In the multivariable analysis, female gender (AOR= 3.20, 95% CI: 1.06-9.63, p = 0.039) and higher score on the Douleur Neuropathique 4 neuropathic pain questionnaire (AOR = 1.34, 95% CI: 1.05-1.70, p = 0.017) were associated with past-year stimulant use to treat pain. CONCLUSION Stimulants may be used for pain self-management, particularly for neuropathic pain and among women. Our findings suggest an underexplored motivation for stimulant use in an era of reduced access to prescribed opioids.
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Affiliation(s)
- Cathleen M. Beliveau
- Center on Substance Use and Health, San Francisco Department of Public Health, San Francisco, CA, USA
| | - Vanessa M. McMahan
- Center on Substance Use and Health, San Francisco Department of Public Health, San Francisco, CA, USA
| | - Justine Arenander
- Center on Substance Use and Health, San Francisco Department of Public Health, San Francisco, CA, USA
| | - Martin S. Angst
- Department of Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Margot Kushel
- University of California San Francisco, San Francisco, CA, USA
| | - Andrea Torres
- Center on Substance Use and Health, San Francisco Department of Public Health, San Francisco, CA, USA
| | - Glenn-Milo Santos
- Center on Substance Use and Health, San Francisco Department of Public Health, San Francisco, CA, USA.,University of California San Francisco, San Francisco, CA, USA
| | - Phillip O. Coffin
- Center on Substance Use and Health, San Francisco Department of Public Health, San Francisco, CA, USA.,University of California San Francisco, San Francisco, CA, USA
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Guarraci FA, Ali M, Gonzalez CMF, Lucero D, Clemons LW, Davis LK, Henneman EL, Odell SE, Meerts SH. I. Antidepressants and sexual behavior: Weekly ketamine injections increase sexual behavior initially in female and male rats. Pharmacol Biochem Behav 2020; 199:173039. [PMID: 32926881 DOI: 10.1016/j.pbb.2020.173039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/03/2020] [Accepted: 09/07/2020] [Indexed: 12/28/2022]
Abstract
The present study characterized the effects of weekly ketamine injections on sexual behavior and anxiety in female and male rats, using a dosing protocol that mimics human therapeutic treatment for depression. In Experiment 1A, ketamine (10 mg/kg, i.p.) or saline was injected once per week for four consecutive weeks. The partner preference paradigm was used to measure sexual motivation 30 min after each weekly injection. Briefly, subjects were first given a 10-min test during which they could choose to spend time in the vicinity of a sexually receptive female stimulus or a sexually experienced male stimulus, however physical contact was restricted (no-contact). Immediately after, subjects were given unrestricted access to the stimulus animals (contact). After a washout period, subjects received four additional weekly injections of ketamine or saline, and then were tested for anxiety-like behavior on the elevated plus maze (EPM) after the last injection (Experiment 1B). For Experiment 2, similar procedures were used to test the effects of weekly ketamine injections on sexual motivation (Experiment 2A) and anxiety (Experiment 2B) in male subjects. In female subjects, ketamine increased sexual motivation as measured by greater time spent with the male stimulus, decreased likelihood of leaving after receiving mounts, and shorter return latencies after receiving intromissions, when compared to saline controls. In male subjects, ketamine shortened latency to first mount and first intromission, as well as increased time spent with the female stimulus. Very little anxiety was observed in either group (ketamine or saline) of female or male subjects when tested on the EPM. In conclusion, even after four weeks of ketamine exposure, sexual dysfunction did not emerge in either females or males. In contrast, ketamine increased sexual motivation in both females and males, with an initial robust response. However, as both groups gained sexual experience, the impact of ketamine diminished.
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Affiliation(s)
- Fay A Guarraci
- Department of Psychology, Southwestern University, Georgetown, TX 78626, USA.
| | - Maryam Ali
- Department of Psychology, Southwestern University, Georgetown, TX 78626, USA
| | | | - Devon Lucero
- Department of Psychology, Southwestern University, Georgetown, TX 78626, USA
| | - Larry W Clemons
- Department of Psychology, Southwestern University, Georgetown, TX 78626, USA
| | - Lourdes K Davis
- Department of Psychology, Southwestern University, Georgetown, TX 78626, USA
| | | | - Shannon E Odell
- Department of Psychology, Southwestern University, Georgetown, TX 78626, USA
| | - Sarah H Meerts
- Neuroscience Program and Department of Psychology, Carleton College, Northfield, MN 55057, USA
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Ogata M, Akita H, Ishibashi H. Behavioral responses to anxiogenic tasks in young adult rats with neonatal dopamine depletion. Physiol Behav 2019; 204:10-19. [PMID: 30738032 DOI: 10.1016/j.physbeh.2019.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 01/29/2019] [Accepted: 02/05/2019] [Indexed: 12/19/2022]
Abstract
The dopaminergic neural system plays a crucial role in motor regulation as well as regulation of anxiety-related behaviors. Although rats with neonatal dopamine depletion exhibit motor hyperactivity and have been utilized as animal models of attention deficit hyperactivity disorder, characterization of their behavior under anxiogenic conditions is lacking. In the present study, we investigated behavioral responses to anxiogenic stimuli in young adult rats with neonatal dopamine depletion using the open field (OF), elevated plus maze (EPM), and light/dark (L/B) box tests. The OF and EPM tests were performed under low-light and bright-light conditions. The ameliorative effects of pretreatment with methamphetamine (MAP) or atomoxetine (ATX) on abnormal behaviors induced by neonatal dopamine depletion were also assessed. Rats that underwent 6-hydroxydopamine treatment 4 day after birth showed significant increases in motor activity and decreases in anxiety-related behaviors in OF tests under both conditions and in EPM tests under bright-light conditions. Furthermore, rats with neonatal dopamine depletion did not show normal behavioral responsiveness to changes in the intensity of anxiogenic stimuli. Pretreatment with MAP (4 mg/kg) and ATX (1.2 mg/kg/day) ameliorated motor hyperactivity but not abnormal anxiety-related behaviors. These results suggest that the dopaminergic system plays a crucial role in the development of neural networks involved in locomotion as well as in those involved in anxiety-related behavior. The results indicate that the mechanisms underlying the abnormal anxiolytic responses partially differ from those underlying motor hyperactivity.
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Affiliation(s)
- Masanori Ogata
- Department of Physiology, School of Allied Health Sciences, Kitasato University, 1-15-1, Kitasato Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.
| | - Hisanao Akita
- Department of Physiology, School of Allied Health Sciences, Kitasato University, 1-15-1, Kitasato Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.
| | - Hitoshi Ishibashi
- Department of Physiology, School of Allied Health Sciences, Kitasato University, 1-15-1, Kitasato Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.
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Garton DR, Ross SG, Maldonado-Hernández R, Quick M, Lasalde-Dominicci JA, Lizardi-Ortiz JE. Amphetamine enantiomers inhibit homomeric α7 nicotinic receptor through a competitive mechanism and within the intoxication levels in humans. Neuropharmacology 2018; 144:172-183. [PMID: 30359640 DOI: 10.1016/j.neuropharm.2018.10.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 10/10/2018] [Accepted: 10/21/2018] [Indexed: 11/28/2022]
Abstract
Amphetamine-type stimulants (ATS) are the second most consumed illicit drug worldwide and lack good treatments for associated substance use disorders, lagging behind other addictive drugs. For this reason, a deeper understanding of the pharmacodynamics of ATS is required. The present study seeks to determine amphetamine (AMPH) enantiomers' effects on the homomeric α7 nicotinic acetylcholine receptor (α7 nAChR). Here we have shown that AMPH enantiomers bind to the α7 nAChR and competitively inhibit acetylcholine responses. Our in silico docking analysis suggests that AMPH binds close to the β7 strand of the B-loop of a chimera comprising of the human α7 nAChR and the acetylcholine binding protein from Lymnaea stagnalis. This may inhibit the required movement of the C-loop for channel opening, due to steric hindrance, providing a structural mechanism for its antagonist effect. Finally, we have shown that, in α7 nAChR full knockout mice, the behavioral response to D-AMPH is attenuated, providing direct evidence for the role of α7 nAChRs on the physiological response to D-AMPH. Importantly, D-AMPH exerts these effects at concentrations predicted to be pharmacologically relevant for chronic methamphetamine users and during binges. In conclusion, our data present new findings that implicate the α7 nAChR on the pharmacodynamics of ATS, which may be important for behavioral responses to these drugs, indicating a potential role for α7 nAChRs in ATS substance-use disorders.
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Affiliation(s)
- Daniel R Garton
- Columbia College of Columbia University, New York, NY, 10027, USA
| | - Sharmaine G Ross
- Department of Biobehavioral Sciences, Teachers College Columbia University, New York, NY, 10027, USA
| | | | - Matthias Quick
- Department of Psychiatry, Molecular Therapeutics Division, Columbia University Medical Center, New York, NY, 10032, USA
| | - José A Lasalde-Dominicci
- Departments of Biology and Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, PR, 00931, USA; Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR, 00927, USA
| | - José E Lizardi-Ortiz
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR, 00927, USA; Departments of Neurology and Psychiatry, Columbia University Medical Center, New York, NY, 10032, USA.
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Ogata M, Noda K, Akita H, Ishibashi H. Characterization of nociceptive response to chemical, mechanical, and thermal stimuli in adolescent rats with neonatal dopamine depletion. Neuroscience 2015; 289:43-55. [DOI: 10.1016/j.neuroscience.2015.01.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/27/2014] [Accepted: 01/05/2015] [Indexed: 12/26/2022]
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Lei BH, Chen JH, Yin HS. Repeated amphetamine treatment alters spinal magnetic resonance signals and pain sensitivity in mice. Neurosci Lett 2014; 583:70-5. [PMID: 25246351 DOI: 10.1016/j.neulet.2014.09.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 09/10/2014] [Accepted: 09/12/2014] [Indexed: 10/24/2022]
Abstract
Manganese-enhanced magnetic resonance imaging (MEMRI) has been extensively used in studying the structural and functional features of the central nervous system (CNS). Divalent manganese ion (Mn(2+)) not only enhances MRI contrast, but also enters cells via voltage-gated calcium channels or ionotropic glutamate receptors, which represents an index of neural activities. In the current mouse model, following the repeated amphetamine (Amph) treatment, a reduction of reactivity to thermal pain stimulus was noticed. Since the spinal dorsal horn is the first relay station for pain transmission in CNS, we examined the changes of neural activity in the dorsal spinal cord, particularly the superficial dorsal horn, by analyzing manganese-enhanced T1-weighted MR images (T1WIs). Our data revealed a temporal correlation between reduced pain sensitivity and increased MEMR signals in the spinal dorsal horn subsequent to repeated Amph treatments.
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Affiliation(s)
- Bing-Hsuan Lei
- Interdisciplinary MRI/MRS Lab, Graduate Institute of Electrical Engineering, National Taiwan University, Taiwan, ROC; National Taiwan University Molecular Imaging Center, Taiwan, ROC
| | - Jyh-Horng Chen
- Interdisciplinary MRI/MRS Lab, Graduate Institute of Electrical Engineering, National Taiwan University, Taiwan, ROC; National Taiwan University Molecular Imaging Center, Taiwan, ROC; Neurobiology and Cognitive Science Center, National Taiwan University, Taiwan, ROC.
| | - Hsiang-Shu Yin
- Neurobiology and Cognitive Science Center, National Taiwan University, Taiwan, ROC; Graduate Institute of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taiwan, ROC.
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Protracted treatment with MDMA induces heteromeric nicotinic receptor up-regulation in the rat brain: an autoradiography study. Prog Neuropsychopharmacol Biol Psychiatry 2014; 53:1-8. [PMID: 24614096 DOI: 10.1016/j.pnpbp.2014.02.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 02/10/2014] [Accepted: 02/26/2014] [Indexed: 11/23/2022]
Abstract
Previous studies indicate that 3,4-methylenedioxy-methamphetamine (MDMA, ecstasy) can induce a heteromeric nicotinic acetylcholine receptor (nAChR, mainly of α4β2 subtype) up-regulation. In this study we treated male Sprague-Dawley rats twice-daily for 10 days with either saline or MDMA (7 mg/kg) and sacrificed them the day after to perform [(125)I]Epibatidine binding autoradiograms on serial coronal slices. MDMA induced significant increases in nAChR density in the substantia nigra, ventral tegmental area, nucleus accumbens, olfactory tubercle, anterior caudate-putamen, somatosensory, motor, auditory and retrosplenial cortex, laterodorsal thalamus nuclei, amygdala, postsubiculum and pontine nuclei. These increases ranged from 3% (retrosplenial cortex) to 30 and 34% (amygdala and substantia nigra). No increased α4 subunit immunoreactivity was found in up-regulated areas compared with saline-treated rats, suggesting a post-translational mechanism as occurs with nicotine. The heteromeric nAChR up-regulation in certain areas could account, at least in part, for the reinforcing, sensitizing and psychiatric disorders observed after long-term consumption of MDMA.
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Llabrés S, García-Ratés S, Cristóbal-Lecina E, Riera A, Borrell JI, Camarasa J, Pubill D, Luque FJ, Escubedo E. Molecular basis of the selective binding of MDMA enantiomers to the alpha4beta2 nicotinic receptor subtype: Synthesis, pharmacological evaluation and mechanistic studies. Eur J Med Chem 2014; 81:35-46. [DOI: 10.1016/j.ejmech.2014.04.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Varela RB, Valvassori SS, Lopes-Borges J, Fraga DB, Resende WR, Arent CO, Zugno AI, Quevedo J. Evaluation of acetylcholinesterase in an animal model of mania induced by D-amphetamine. Psychiatry Res 2013; 209:229-34. [PMID: 23245536 DOI: 10.1016/j.psychres.2012.11.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 09/21/2012] [Accepted: 11/11/2012] [Indexed: 12/23/2022]
Abstract
The present study aims to investigate the effects of mood stabilizers, lithium (Li) and valproate (VPA), on acetylcholinesterase (AChE) activity in the brains of rats subjected to an animal model of mania induced by D-amphetamine (D-AMPH). In the reversal treatment, Wistar rats were first given D-AMPH or saline (Sal) for 14 days. Between days 8 and 14, the rats were treated with Li, VPA, or Sal. In the prevention treatment, rats were pretreated with Li, VPA, or Sal. AChE activity was measured in the brain structures (prefrontal cortex, hippocampus, and striatum). Li, alone in reversion and prevention treatments, increased AChE activity in the brains of rats. VPA, alone in prevention treatment, increased AChE activity in all brain regions evaluated; in the reversion, only in the prefrontal. However, D-AMPH decreased activity of AChE in the striatum of rats in both the reversion and prevention treatments. VPA was able to revert and prevent this AChE activity alteration in the rat striatum. Our findings further support the notion that the mechanisms of mood stabilizers also involve changes in AChE activity, thus reinforcing the need for more studies to better characterize the role of acetylcholine in bipolar disorder.
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Affiliation(s)
- Roger B Varela
- Laboratory of Neurosciences, National Institute for Translational Medicine (INCT-TM), Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina, 88806-000 Criciúma, SC, Brazil
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Ciudad-Roberts A, Camarasa J, Pubill D, Escubedo E. Heteromeric nicotinic receptors are involved in the sensitization and addictive properties of MDMA in mice. Prog Neuropsychopharmacol Biol Psychiatry 2013; 44:201-9. [PMID: 23466442 DOI: 10.1016/j.pnpbp.2013.02.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 01/30/2013] [Accepted: 02/21/2013] [Indexed: 12/12/2022]
Abstract
We have investigated the effect of nicotinic receptor ligands in the behavioral sensitization (hyperlocomotion) and rewarding properties (conditioned place preference paradigm, CPP) of 3,4-methylenedioxy-methamphetamine (MDMA) in mice. Each animal received intraperitoneal pretreatment with either saline, dihydro-β-erythroidine (DHβE, 1 mg/kg) or varenicline (VAR, 0.3 mg/kg), 15 min prior to subcutaneous saline or MDMA (5 mg/kg), for 10 consecutive days. On day 1, both DHβE and VAR inhibited the MDMA-induced hyperlocomotion. After 10 days of treatment, MDMA induced a hyperlocomotion that was not reduced (rather enhanced) in antagonist-pretreated animals. This early hyperlocomotion was accompanied by a significant increase in heteromeric nicotinic receptors in cortex that was not blocked by DHβE or VAR. Behavioral sensitization to MDMA was highest 2 weeks after the discontinuation of MDMA treatment. This additional increase in sensitivity was prevented in animals pretreated with DHβE or VAR. At this time, MDMA-treated mice showed a significant increase in heteromeric receptors in cortex that was prevented by DHβE and VAR. An involvement of α7 nicotinic receptors in this effect is ruled out. MDMA (10 mg/kg) induced positive CPP that was abolished by DHβE (2 mg/kg) and VAR (2 mg/kg). Moreover, chronic nicotine pretreatment (2 mg/kg, ip, b.i.d., for 14 days) caused MDMA, administered at a low dose (3 mg/kg), to induce CPP, which would otherwise not occur. Finally, present results point out that heteromeric nicotinic receptors are involved in locomotor sensitization and addictive potential induced by MDMA. Thus, varenicline might be a useful drug to treat both tobacco and MDMA abuse at once.
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Affiliation(s)
- Andrés Ciudad-Roberts
- Department of Pharmacology and Therapeutic Chemistry (Pharmacology Section), Institute of Biomedicine (IBUB), University of Barcelona, Barcelona, Spain
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López-Arnau R, Martínez-Clemente J, Pubill D, Escubedo E, Camarasa J. Comparative neuropharmacology of three psychostimulant cathinone derivatives: butylone, mephedrone and methylone. Br J Pharmacol 2013; 167:407-20. [PMID: 22509960 DOI: 10.1111/j.1476-5381.2012.01998.x] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND AND PURPOSE Here, we have compared the neurochemical profile of three new cathinones, butylone, mephedrone and methylone, in terms of their potential to inhibit plasmalemmal and vesicular monoamine transporters. Their interaction with 5-HT and dopamine receptors and their psychostimulant effect was also studied. EXPERIMENTAL APPROACH Locomotor activity was recorded in mice following different doses of cathinones. Monoamine uptake assays were performed in purified rat synaptosomes. Radioligand-binding assays were carried out to assess the affinity of these compounds for monoamine transporters or receptors. KEY RESULTS Butylone, mephedrone and methylone (5-25 mg·kg(-1) ) caused hyperlocomotion, which was prevented with ketanserin or haloperidol. Methylone was the most potent compound inhibiting both [(3) H]5-HT and [(3) H]dopamine uptake with IC(50) values that correlate with its affinity for dopamine and 5-HT transporter. Mephedrone was found to be the cathinone derivative with highest affinity for vesicular monoamine transporter-2 causing the inhibition of dopamine uptake. The affinity of cathinones for 5-HT(2A) receptors was similar to that of MDMA. CONCLUSIONS AND IMPLICATIONS Butylone and methylone induced hyperlocomotion through activating 5-HT(2A) receptors and increasing extra-cellular dopamine. They inhibited 5-HT and dopamine uptake by competing with substrate. Methylone was the most potent 5-HT and dopamine uptake inhibitor and its effect partly persisted after withdrawal. Mephedrone-induced hyperlocomotion was dependent on endogenous 5-HT. Vesicular content played a key role in the effect of mephedrone, especially for 5-HT uptake inhibition. The potency of mephedrone in inhibiting noradrenaline uptake suggests a sympathetic effect of this cathinone.
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Affiliation(s)
- Raul López-Arnau
- Department of Pharmacology and Therapeutic Chemistry (Pharmacology Section) and Institute of Biomedicine (IBUB), University of Barcelona, Barcelona, Spain
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Brensilver M, Heinzerling KG, Swanson AN, Telesca D, Furst BA, Shoptaw SJ. Cigarette smoking as a target for potentiating outcomes for methamphetamine abuse treatment. Drug Alcohol Rev 2012; 32:96-9. [PMID: 22385210 DOI: 10.1111/j.1465-3362.2012.00423.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
INTRODUCTION AND AIMS Cigarette smoking occurs frequently among individuals with methamphetamine (MA) dependence. Preclinical and clinical evidence has suggested that the common co-abuse of MA and cigarettes represents a pharmacologically meaningful pattern. METHODS The present study is a secondary analysis of a randomised, placebo-controlled trial of bupropion treatment for MA dependence (bupropion n = 36; placebo n = 37). A hierarchical logistic modelling approach assessed the efficacy of bupropion for reducing MA use separately among smokers and non-smokers. Among smokers, relations between cigarettes smoked and MA use were assessed. RESULTS Smoking status did not affect treatment responsiveness in either the bupropion condition or the placebo condition. In the placebo condition, increased cigarette use was associated with an increased probability of MA use during the same time period. This effect was not observed in the bupropion condition. DISCUSSION AND CONCLUSIONS Initial smoking status did not impact treatment outcomes. Among smokers, results suggest that bupropion may dissociate cigarette and MA use. The effect was modest and a precise pharmacological mechanism remains elusive. Cholinergic systems may be relevant for MA use outcomes. Future studies should continue to assess the role of smoking in MA treatment outcomes.
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Affiliation(s)
- Matthew Brensilver
- Department of Family Medicine, David Geffen School of Medicine at UCLA, Los Angeles, USA.
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Li SF, Wu MN, Wang XH, Yuan L, Yang D, Qi JS. Requirement of α7 nicotinic acetylcholine receptors for amyloid beta protein-induced depression of hippocampal long-term potentiation in CA1 region of rats in vivo. Synapse 2011; 65:1136-43. [DOI: 10.1002/syn.20951] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 05/07/2011] [Accepted: 05/11/2011] [Indexed: 11/09/2022]
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Rahman S. Brain nicotinic receptors as emerging targets for drug addiction: neurobiology to translational research. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 98:349-65. [PMID: 21199776 DOI: 10.1016/b978-0-12-385506-0.00008-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Drug addiction, a chronic relapsing disorder, is a serious public health problem around the world. A growing body of preclinical and clinical evidence suggests that mammalian brain nicotinic acetylcholine receptors (nAChRs), the heterogeneous family of ion channels, play a pivotal role in drug addiction, including nicotine and alcohol dependence. As a result, there is an increasing interest in developing nAChR-based therapies for the treatment of addictive disorders. The current review summarizes the important preclinical and clinical data, demonstrating the ability of nAChR ligands to modulate nicotine and alcohol-induced biobehavioral and neurochemical changes in laboratory animals and humans. Recent studies suggest that partial agonists and antagonists at nAChRs have therapeutic potential for the management of nicotine and alcohol dependence. The complexity of nAChRs and their regulation for the development of nAChR-based drug candidates as novel pharmacotherapy for other addictive disorders will also be discussed. Taken together, this review will provide new insights into nAChR-based compounds and offer innovative translational strategies for combating drug addictive disorders.
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Affiliation(s)
- Shafiqur Rahman
- Department of Pharmaceutical Sciences, College of Pharmacy, South Dakota State University, Brookings, South Dakota, USA
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