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https://www.readbyqxmd.com/read/29778945/self-administration-of-the-synthetic-cathinone-mpdv-enhances-reward-function-via-a-nicotinic-receptor-dependent-mechanism
#1
Jean R Geste, Marjory Pompilus, Marcelo Febo, Adriaan W Bruijnzeel
Methylenedioxypyrovalerone (MDPV) is an addictive synthetic drug with severe side effects. Previous studies have shown that MDPV has positive reinforcing properties. However, little is known about the effect of MDPV self-administration on the state of the brain reward system and the neuronal mechanisms by which MDPV mediates its effects. The goal of the present studies was to determine the effect of MDPV self-administration on reward function and the role of cholinergic neurotransmission in the reinforcing effects of MDPV...
May 9, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29776349/randomised-controlled-trial-rct-of-cannabinoid-replacement-therapy-nabiximols-for-the-management-of-treatment-resistant-cannabis-dependent-patients-a-study-protocol
#2
Anjali K Bhardwaj, David J Allsop, Jan Copeland, Iain S McGregor, Adrian Dunlop, Marian Shanahan, Raimondo Bruno, Nghi Phung, Mark Montebello, Craig Sadler, Jessica Gugusheff, Melissa Jackson, Jennifer Luksza, Nicholas Lintzeris
BACKGROUND: The cannabis extract nabiximols (Sativex®) effectively supresses withdrawal symptoms and cravings in treatment resistant cannabis dependent individuals, who have high relapse rates following conventional withdrawal treatments. This study examines the efficacy, safety and cost-effectiveness of longer-term nabiximols treatment for outpatient cannabis dependent patients who have not responded to previous conventional treatment approaches. METHODS/DESIGN: A phase III multi-site outpatient, randomised, double-blinded, placebo controlled parallel design, comparing a 12-week course of nabiximols to placebo, with follow up at 24 weeks after enrolment...
May 18, 2018: BMC Psychiatry
https://www.readbyqxmd.com/read/29775959/adolescent-smokers-response-to-reducing-the-nicotine-content-of-cigarettes-acute-effects-on-withdrawal-symptoms-and-subjective-evaluations
#3
Rachel N Cassidy, Suzanne M Colby, Jennifer W Tidey, Kristina M Jackson, Patricia A Cioe, Suchitra Krishnan-Sarin, Dorothy Hatsukami
BACKGROUND: Mandating a reduction in the nicotine content of cigarettes to a minimally addictive level could dramatically reduce smoking rates in the US. However, little is known about the effects of reduced nicotine content cigarettes in adolescents. METHODS: Following overnight abstinence, adolescent daily smokers (ages 15-19, n = 50) reported on their craving, withdrawal, and positive and negative affect pre- and post- ad lib smoking of one cigarette containing varying nicotine content (15...
May 15, 2018: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29775302/free-base-nicotine-determination-in-electronic-cigarette-liquids-by-1-h-nmr-spectroscopy
#4
Anna K Duell, James F Pankow, David H Peyton
E-liquids usually contain significant nicotine, which will exist primarily in two forms, monoprotonated and free-base the proportions are alterable through the effective pH of the medium. The fraction of nicotine in the free-base form is αfb , with 0 < αfb < 1. When dosed via aerosol, the two nicotine forms have different mechanisms and kinetics of delivery, as well as differing implications for harshness of the inhaled aerosol, so αfb is relevant regarding abuse liability. Previous attempts to determine αfb in electronic cigarette liquids and vapor have been flawed...
May 18, 2018: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29771559/body-mass-index-across-adolescence-and-substance-use-problems-in-early-adulthood
#5
Ashley N Gearhardt, Rebecca Waller, Jennifer M Jester, Luke W Hyde, Robert A Zucker
Excessive substance use and obesity are underpinned by a number of shared risk factors (e.g., reward dysfunction, impulsivity). Food and drugs of abuse engage similar reward-related neural circuitry and the food-drug competition hypothesis proposes that excess consumption of food may diminish desire for drugs of abuse by competing for neural receptors associated with reward and motivation. Adolescence is a high-risk period for both increased substance use and excessive weight gain. In the present study, the authors tested whether, consistent with the food-drug competition hypothesis, elevated body mass index (BMI) across adolescence predicted fewer substance use problems in young adulthood...
May 2018: Psychology of Addictive Behaviors: Journal of the Society of Psychologists in Addictive Behaviors
https://www.readbyqxmd.com/read/29763835/predictors-of-reduced-smoking-quantity-among-recovering-alcohol-dependent-men-in-a-smoking-cessation-trial
#6
Matthew J Worley, Melodie Isgro, Jaimee L Heffner, Soo Yong Lee, Belinda E Daniel, Robert M Anthenelli
INTRODUCTION: Adults with alcohol dependence (AD) have exceptionally high smoking rates and poor smoking cessation outcomes. Discovery of factors that predict reduced smoking among AD smokers may help improve treatment. This study examined baseline predictors of smoking quantity among AD smokers in a pharmacotherapy trial for smoking cessation. METHODS: The sample includes male, AD smokers (N = 129) with 1-32 months of alcohol abstinence who participated in a 12-week trial of medication (topiramate vs...
May 9, 2018: Addictive Behaviors
https://www.readbyqxmd.com/read/29761343/role-of-exogenous-progesterone-in-the-treatment-of-men-and-women-with-substance-use-disorders-a-narrative-review
#7
REVIEW
MacKenzie R Peltier, Mehmet Sofuoglu
Substance use disorders (SUDs) remain problematic as many individuals are untreated or do not benefit from the currently available interventions. Thus, there is an urgent need to develop novel pharmacological interventions to treat SUDs. Evidence suggests that the female sex hormone, progesterone, attenuates the craving for and the euphoric effects of drugs of abuse. Research to date has demonstrated that progesterone may modulate responses to drugs of abuse and may have utility as a novel treatment for SUDs...
May 14, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29759132/the-gamma-aminobutyric-acid-b-receptor-in-depression-and-reward
#8
REVIEW
Laura H Jacobson, Styliani Vlachou, David A Slattery, Xia Li, John F Cryan
The metabotropic gamma-aminobutyric acid B (GABAB ) receptor was the first described obligate G protein-coupled receptor heterodimer and continues to set the stage for discoveries in G protein-coupled receptor signaling complexity. In this review, dedicated to the life and work of Athina Markou, we explore the role of GABAB receptors in depression, reward, and the convergence of these domains in anhedonia, a shared symptom of major depressive disorder and withdrawal from drugs of abuse. GABAB receptor expression and function are enhanced by antidepressants and reduced in animal models of depression...
June 1, 2018: Biological Psychiatry
https://www.readbyqxmd.com/read/29746451/tobacco-cessation-interventions-and-smoke-free-policies-in-mental-health-and-substance-abuse-treatment-facilities-united-states-2016
#9
Kristy Marynak, Brenna VanFrank, Sonia Tetlow, Margaret Mahoney, Elyse Phillips, Ahmed Jamal Mbbs, Anna Schecter, Doug Tipperman, Stephen Babb
Persons with mental or substance use disorders or both are more than twice as likely to smoke cigarettes as persons without such disorders and are more likely to die from smoking-related illness than from their behavioral health conditions (1,2). However, many persons with behavioral health conditions want to and are able to quit smoking, although they might require more intensive treatment (2,3). Smoking cessation reduces smoking-related disease risk and could improve mental health and drug and alcohol recovery outcomes (1,3,4)...
May 11, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29725702/assessment-of-the-abuse-liability-of-three-menthol-vuse-solo-electronic-cigarettes-relative-to-combustible-cigarettes-and-nicotine-gum
#10
Mitchell F Stiles, Leanne R Campbell, Tao Jin, Donald W Graff, Reginald V Fant, Jack E Henningfield
RATIONALE: We previously reported that following a short-term product use period, use of non-menthol Vuse Solo electronic cigarettes (ECs) resulted in product effect-related subjective responses and nicotine uptake between those of combustible cigarettes (high-abuse liability comparator) and nicotine gum (low-abuse liability comparator); the results were generally closer to those of nicotine gum. OBJECTIVE: Using a similar design to the previous study, we evaluated the abuse liability of three menthol-flavored Vuse Solo ECs with the same nicotine contents (14, 29, and 36 mg) in a group of EC-naïve, menthol cigarette smokers, relative to comparator products...
May 3, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29704599/erysodine-a-competitive-antagonist-at-neuronal-nicotinic-acetylcholine-receptors-decreases-ethanol-consumption-in-alcohol-preferring-uchb-rats
#11
Gabriel Quiroz, Nicolás Guerra-Díaz, Patricio Iturriaga-Vásquez, Mario Rivera-Meza, María Elena Quintanilla, Ramón Sotomayor-Zárate
Alcohol abuse is a worldwide health problem with high economic costs to health systems. Emerging evidence suggests that modulation of brain nicotinic acetylcholine receptors (nAChRs) may be a therapeutic target for alcohol dependence. In this work, we assess the effectiveness of four doses of erysodine (1.5, 2.0, 4.0 or 8.0 mg/kg/day, i.p.), a competitive antagonist of nAChRs, on voluntary ethanol consumption behavior in alcohol-preferring UChB rats, administered during three consecutive days. Results show that erysodine administration produces a dose-dependent reduction in ethanol consumption respect to saline injection (control group)...
April 25, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29692206/pilot-investigation-of-the-effect-of-carvedilol-on-stress-precipitated-smoking-lapse-behavior
#12
Terril L Verplaetse, Andrea H Weinberger, Rebecca L Ashare, Brian P Pittman, Julia M Shi, Jeanette M Tetrault, Meaghan Lavery, Sherry A McKee
INTRODUCTION: Separate α1- and β-adrenergic antagonists have shown efficacy in reducing nicotine-motivated behaviors in rodents and humans, supporting a role for the noradrenergic system in mediating the reinforcing properties of drugs of abuse. However, the effect of the combined α1- and β-adrenergic antagonist, carvedilol, on stress-related smoking is unknown. METHODS: Using a well-established human laboratory model of stress-precipitated smoking-lapse behavior, we examined whether carvedilol (0 or 50 mg/day; between subject, n=17 per group), administered to steady-state, would attenuate the ability to resist smoking following stress imagery (vs...
April 1, 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29690521/the-gaba-a-receptor-%C3%AE-2-subunit-activates-a-neuronal-tlr4-signal-in-the-ventral-tegmental-area-that-regulates-alcohol-and-nicotine-abuse
#13
Irina Balan, Kaitlin T Warnock, Adam Puche, Marjorie C Gondre-Lewis, Harry June, Laure Aurelian
Alcoholism initiates with episodes of excessive alcohol drinking, known as binge drinking, which is one form of excessive drinking (NIAAA Newsletter, 2004) that is related to impulsivity and anxiety (Ducci et al., 2007; Edenberg et al., 2004) and is also predictive of smoking status. The predisposition of non-alcohol exposed subjects to initiate binge drinking is controlled by neuroimmune signaling that includes an innately activated neuronal Toll-like receptor 4 (TLR4) signal. This signal also regulates cognitive impulsivity, a heritable trait that defines drug abuse initiation...
April 21, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29653137/hyperactivity-and-memory-learning-deficits-evoked-by-developmental-exposure-to-nicotine-and-or-ethanol-are-mitigated-by-camp-and-cgmp-signaling-cascades-activation
#14
Yael Abreu-Villaça, Anna C Carvalho-Graça, Gabriela Skinner, Bruna M Lotufo, Vitor H S Duarte-Pinheiro, Anderson Ribeiro-Carvalho, Alex C Manhães, Claudio C Filgueiras
Pregnant smoking women are frequently episodic drinkers. Here, we investigated whether ethanol exposure restricted to the brain growth spurt period when combined with chronic developmental exposure to nicotine aggravates memory/learning deficits and hyperactivity, and associated cAMP and cGMP signaling disruption. To further investigate the role of these signaling cascades, we verified whether vinpocetine (a phosphodiesterase inhibitor) ameliorates the neurochemical and behavioral outcomes. Swiss mice had free access to nicotine (NIC, 50 μg/ml) or water to drink during gestation and until the 8th postnatal day (PN8)...
April 10, 2018: Neurotoxicology
https://www.readbyqxmd.com/read/29644427/-gender-specific-differences-of-the-early-postoperative-and-oncosurgical-long-term-outcome-in-rectal-cancer-data-obtained-in-a-prospective-multicenter-observational-study
#15
J Katzenstein, R Steinert, H Ptok, R Otto, I Gastinger, H Lippert, F Meyer
BACKGROUND: Gender-specific aspects have been increasingly considered in clinical medicine, also in oncological surgery. AIM: To analyze gender-specific differences of early postoperative and oncological outcomes after rectal cancer resection based on data obtained in a prospective multicenter observational study. PATIENTS AND METHODS: As part of the multicenter prospective observational study "Quality assurance in primary rectal cancer", data on tumor site, exogenic and endogenic risk factors, neoadjuvant treatment, surgical procedures, tumor stage, intraoperative and postoperative complications of patients with the histological diagnosis of rectal cancer were registered...
April 11, 2018: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/29606560/biospecimens-and-the-abcd-study-rationale-methods-of-collection-measurement-and-early-data
#16
REVIEW
Kristina A Uban, Megan K Horton, Joanna Jacobus, Charles Heyser, Wesley K Thompson, Susan F Tapert, Pamela A F Madden, Elizabeth R Sowell
Biospecimen collection in the Adolescent Brain Cognitive Development (ABCD) study - of hair samples, shed deciduous (baby) teeth, and body fluids - will serve dual functions of screening for study eligibility, and providing measures of biological processes thought to predict or correlate with key study outcomes on brain and cognitive development. Biosamples are being collected annually to screen for recency of drug use prior to the neuroimaging or cognitive testing visit, and to store for the following future studies: (1) on the effects of exposure to illicit and recreational drugs (including alcohol and nicotine); (2) of pubertal hormones on brain and cognitive developmental trajectories; (3) on the contribution of genomics and epigenomics to child and adolescent development and behavioral outcomes; and (4) with pre- and post-natal exposure to environmental neurotoxicants and drugs of abuse measured from novel tooth analyses...
March 16, 2018: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/29587564/mirtazapine-attenuates-nicotine-seeking-behavior-in-rats
#17
Susana Barbosa-Méndez, Alberto Salazar-Juárez
BACKGROUND: Nicotine is the major psychoactive component of tobacco. A number of pharmacological therapies have been evaluated, with poor results. Given the lack of success of these therapies, several authors have proposed alternative therapeutic strategies. One of these is the use of antidepressant drugs that may have a specific effect on the neural pathways or receptors underlying nicotine addiction. Mirtazapine is an antagonist of α2 NE receptors (noradrenergic receptor), 5-HT2A/C and 5-HT3 receptors and has demonstrated efficacy in reducing behavioral effects induced by drugs of abuse in human and animal models...
March 1, 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29580953/effects-of-drugs-of-abuse-on-channelrhodopsin-2-kinetics
#18
Dominic Gioia, Minfu Xu, Wesley Wayman, John Woodward
Channelrhodopsins are light activated ion channels used extensively over the past decade to probe the function of genetically defined neuronal populations and distinct neural circuits with high temporal and spatial precision. The widely used Channelrhodopsin-2 variant (ChR2) is an excitatory opsin that undergoes conformational changes in response to blue light, allowing non-selective passage of protons and cations across the plasma membrane thus leading to depolarization. In the addiction neuroscience field, opsins such as ChR2 provide a means to disambiguate the overlapping circuitry involved in mediating the reinforcing and aversive effects of drugs of abuse as well as to determine the plasticity that can occur in these circuits during the development of dependence...
March 23, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29573650/does-exposure-to-parental-substance-use-disorders-increase-offspring-risk-for-a-substance-use-disorder-a-longitudinal-follow-up-study-into-young-adulthood
#19
Amy M Yule, Timothy E Wilens, MaryKate Martelon, Lindsay Rosenthal, Joseph Biederman
OBJECTIVE: The main aim of this study was to examine the risk of exposure to parental substance use disorders (SUD; alcohol or drug abuse or dependence) on the risk for SUD in offspring with and without attention deficit hyperactivity disorder (ADHD) followed into young adult years. METHODS: Subjects were derived from two longitudinal case-control studies of probands of both sexes, 6-17 years, with and without DSM-III-R ADHD and their parents. Probands were followed for ten years into young adulthood...
March 10, 2018: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29551733/impacts-of-cannabinoid-receptor-ligands-on-nicotine-and-chronic-mild-stress-induced-cognitive-and-depression-like-effects-in-mice
#20
Karolina Pekala, Agnieszka Michalak, Marta Kruk-Slomka, Barbara Budzynska, Grazyna Biala
Taking into account the rather frequent concomitance of nicotine abuse and stress, we aimed to research memory- and depression-related effects of nicotine administration in combination with chronic mild unpredictable stress (CMUS) in mice and an involvement of the endocannabinoid system through CB1 and CB2 receptors. Mice were submitted to the CMUS for 4 weeks. Effects on depression-like behaviors and cognition, exerted by a combined administration of CB1, i.e., Oleamide (2.5, 5.0 mg/kg), AM 251 (0.1, 0.25 mg/kg) and CB2, i...
March 15, 2018: Behavioural Brain Research
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