Abstract:
:Replacement therapy with the synthetic mu-opioid agonist methadone is an efficacious treatment for opioid abuse. While much is known about methadone's pharmacology, its discriminative stimulus properties remain largely unexplored. The present study sought to establish methadone discrimination in rats. Moreover, some research suggests that route of administration alters the discriminative stimulus of methadone. Thus, the present study also compared intraperitoneal (i.p.) and subcutaneous (s.c.) routes of administration. Male Sprague-Dawley rats were trained to discriminate 3.0mg/kg methadone (i.p.) from vehicle in a two-lever discrimination procedure. Generalization tests were conducted with a variety of compounds administered i.p. and s.c. Methadone fully substituted for itself, yielding ED(50)s of 1.5mg/kg (i.p.) and 0.2mg/kg (s.c.). Naltrexone (i.p.), an opioid antagonist produced a dose-dependent reduction in methadone-appropriate responding. The methadone stereoisomers fully substituted for methadone when given s.c.; however, when administered i.p., (+) and (-) methadone produced partial and no substitution, respectively. Heroin fully generalized to methadone regardless of administration route, while morphine fully substituted when given s.c., but not i.p. The kappa-agonist U50-488 failed to generalize to methadone with either route of administration. These results demonstrated that methadone's discriminative stimulus is mediated through mu-opioid receptor activity and is similar to that of commonly abused opioids (heroin, morphine). Additionally, route of administration produced differential results for many of the drugs tested, suggesting decreased drug bioavailability following i.p. administration due to hepatic first pass metabolism. Taken together, these results suggest that methadone's shared subjective effects with abused opioids, as well as its unique metabolic properties contribute to its efficacy in opioid maintenance therapy.
journal_name
Drug Alcohol Dependjournal_title
Drug and alcohol dependenceauthors
Vann RE,Wise LE,Varvel SA,Philibin SD,Walentiny DM,Porter JHdoi
10.1016/j.drugalcdep.2009.02.015subject
Has Abstractpub_date
2009-08-01 00:00:00pages
124-30issue
3eissn
0376-8716issn
1879-0046pii
S0376-8716(09)00106-9journal_volume
103pub_type
杂志文章abstract::Prolactin (PRL) and thyrotropin (TSH) serum levels were determined in a group of young female heroin addicts treated in hospital with methadone in tapered doses. At admission, from 24 to 3 h after the last dose of 'street' heroin, basal PRL values were 21 +/- 2.6 ng/ml, i.e. significantly higher (P less than 0.001) th...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/0376-8716(87)90034-2
更新日期:1987-11-30 00:00:00
abstract::The leading cause of death among heroin users is drug overdose. The present study examined the relationship between history of self-reported drug overdoses and social network characteristics among cocaine and opiate users. Data were from cross-sectional surveys administered from March 2001 through February 2003 as par...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2003.09.005
更新日期:2004-01-07 00:00:00
abstract:BACKGROUND:Healthcare professionals are crucial in access to treatment for patients with substance use disorders. However, healthcare professionals often have negative attitudes towards this patient group. Healthcare professionals' regard for working with patients with substance use disorders was examined and three sec...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.drugalcdep.2013.09.012
更新日期:2014-01-01 00:00:00
abstract::Cerebral spinal fluid (CSF) levels of methadone were measured in nine methadone maintenance patients requiring lumbar punctures for medical or surgical treatment. Concurrent serum methadone levels were also determined. The CSF concentration of methadone in all cases was a fraction of the corresponding serum level--ran...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/0376-8716(78)90022-4
更新日期:1978-03-01 00:00:00
abstract:BACKGROUND:Alcohol protective behavioral strategies (PBS) have been proposed as mechanisms of change underlying interventions for reducing alcohol use and alcohol-related problems. Few studies have examined PBS use among non-college student populations and no study has examined PBS use among adult injured patients. The...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.drugalcdep.2019.06.037
更新日期:2019-12-01 00:00:00
abstract:BACKGROUND:HIV-infected people who use drugs (PWUD) have poor HIV outcomes. Few studies tested interventions to improve HIV outcomes among PWUD. Abstinence-reinforcing contingency management (CM) reduces drug use and could also improve HIV outcomes. METHODS:From 2012-2017, we conducted a randomized controlled trial te...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2020.108230
更新日期:2020-11-01 00:00:00
abstract:BACKGROUND:Injecting drug use is associated with a range of harms, however cessation of injecting is rare. There is a lack of evidence on factors associated with cessation, notably those related to health services other than drug treatment. We examined the incidence and identified longitudinal correlates of first episo...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2015.06.037
更新日期:2015-09-01 00:00:00
abstract:BACKGROUND:This study presents an integrative data analysis of the association between frequency of cannabis use and severity of depressive symptoms using data from four Australasian cohort studies. The integrated data comprised observations on over 6900 individuals studied on up to seven occasions between adolescence ...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2012.06.002
更新日期:2012-12-01 00:00:00
abstract:BACKGROUND:Prenatal tobacco smoke exposure is associated with alterations in motivated behavior in offspring, such as increased consumption of highly palatable foods and abused drugs. Animal models show that gestational nicotine (GN) exposure mediates changes in responding for sucrose and drug reward. METHODS:A novel,...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2012.01.025
更新日期:2012-08-01 00:00:00
abstract::The need for comprehensive analysis to compare and combine data across multiple studies in order to validate and extend results is widely recognized. This paper aims to assess the extent of data compatibility in the substance abuse and addiction (SAA) sciences through an examination of measure commonality, defined as ...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2014.04.029
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:Neonatal abstinence syndrome (NAS) is a collection of symptoms that occurs primarily due to antenatal opioid exposure. National data on incidence, hospital resource utilization, and demographic features of NAS have not been previously described for Canada. METHODS:Secondary analysis was performed with data ...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2017.12.019
更新日期:2018-04-01 00:00:00
abstract::The goal of this study was to determine the contribution of substance abuse to the expression of suicidal ideation in a sample of patients referred for evaluation of chemical dependency in a large urban Psychiatric Emergency Service (PES). Records from 777 consecutive patients referred to the chemical dependency servi...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/s0376-8716(02)00337-x
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND:A cascade of care framework has been proposed to identify and address implementation gaps in addiction medicine. Using this framework, we characterized temporal trends in engagement in care for opioid use disorder (OUD) in Vancouver, Canada. METHODS:Using data from two cohorts of people who use drugs, we as...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2018.04.026
更新日期:2018-08-01 00:00:00
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...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2014.06.029
更新日期:2014-09-01 00:00:00
abstract:BACKGROUND:Despite harmful consequences of drug addiction, it is common for individuals with substance use disorders to deny having problems with drugs. Emerging evidence suggests that some drug users lack insight into their behavior due to neurocognitive dysfunction, but little research has examined potential neurocog...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2015.03.004
更新日期:2015-06-01 00:00:00
abstract:BACKGROUND:Clock genes have been demonstrated to play a role in behavioral responses to a variety of drugs of abuse, including cocaine, amphetamine, morphine, and ethanol. However, no studies to date have examined the role of Clock genes on nicotine-mediated behaviors. We examined the involvement of Clock, one of sever...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2013.08.024
更新日期:2013-12-01 00:00:00
abstract::The weight, histology and RNA, DNA, protein and lipid content of the liver and arterial and portal plasma amino acid concentrations were determined in male Sprague-Dawley rats fed a liquid diet which met AIN-76A standards with 36% of the calories supplied by ethanol. The dietary components of the dry mixture in percen...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/0376-8716(88)90036-1
更新日期:1988-10-01 00:00:00
abstract::Data from research with laboratory animals indicate that cocaine self-administration can be reduced by lambda-aminobutyric acid (GABA) agonists. Yet, the effectiveness of GABA agonists to decrease human cocaine self-administration has not been investigated under controlled laboratory conditions. The purpose of this st...
journal_title:Drug and alcohol dependence
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/j.drugalcdep.2003.10.015
更新日期:2004-03-08 00:00:00
abstract:BACKGROUND:Mortality rates are elevated among heroin-dependent populations compared to the general population. Liver disease is emerging as an important contributor to mortality as the heroin-dependent population ages. Two major risk factors for liver disease are hepatitis C virus infection and chronic heavy alcohol us...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2012.11.012
更新日期:2013-08-01 00:00:00
abstract::The effects of subchronic nicotine treatment on the development of tolerance and on two nicotinic ligand binding sites were investigated. After subcutaneous injection of nicotine (0.45 mg nicotine base/kg) or saline twice a day for 14 days the body weight of rats was significantly lower than that of control animals. A...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/0376-8716(86)90034-7
更新日期:1986-05-01 00:00:00
abstract:BACKGROUND:Harm associated with injecting drug use is a significant public health issue and a major cause of morbidity and mortality, with global estimates of 3 million injectors infected with HIV and 8 million living with chronic hepatitis C virus (HCV) infection. Estimates of program coverage are widely used in the c...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2011.09.030
更新日期:2012-05-01 00:00:00
abstract:BACKGROUND:Individuals with a family history of alcoholism are at much greater risk for developing an alcohol use disorder (AUD) than youth or adults without such history. A large body of research suggests that there are premorbid differences in brain structure and function in family history positive (FHP) individuals ...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章,评审
doi:10.1016/j.drugalcdep.2015.10.021
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:Cannabidiol, a therapeutic with potential serotonin (5-hydroxytryptamine; 5-HT) 5-HT1A receptor agonist activity, is the second most prevalent cannabinoid in Cannabis after Δ(9)-THC. The extent to which cannabidiol modifies the effects of Δ(9)-THC has not been firmly established, especially with respect to a...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2016.05.016
更新日期:2016-08-01 00:00:00
abstract:BACKGROUND:Co-use of alcohol and cannabis is highly prevalent among young adults and college students. Between-person reports suggest that co-use is associated with the experience of more frequent consumption and related consequences, compared to single substance use. However, recent studies have found conflicting evid...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2020.108339
更新日期:2021-01-01 00:00:00
abstract::Providing information about substances injected can reduce the negative impact of illicit drug consumption and support people who inject drugs to make informed decisions. In Australia, information about drugs injected relies largely on periodic self-report surveys. For the first time, the analysis of the residual cont...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2020.107909
更新日期:2020-04-01 00:00:00
abstract::In this experiment we compared three different schedules of reinforcement for promoting and sustaining short-term drug abstinence. For pragmatic reasons, cigarette smoking was studied as an exemplar of drug self-administration. The three schedules studied were a fixed magnitude of reinforcement for abstinence, a progr...
journal_title:Drug and alcohol dependence
pub_type: 临床试验,杂志文章
doi:10.1016/s0376-8716(99)00073-3
更新日期:2000-02-01 00:00:00
abstract::In a sample of families from a midwestern community study of cigarette smoking, we examined adolescents' and adults' definitions of "addiction", and related these definitions to their perceived addictiveness of cigarette smoking. Both adolescents and adults viewed addiction as multi-faceted, including both appetitive ...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2006.07.006
更新日期:2007-02-23 00:00:00
abstract:BACKGROUND:Past research identified individuals who experienced adverse childhood experiences (ACEs) are at a higher risk of drug use. There is evidence to suggest that identifying as a man who has sex with other men (MSM) may increase the likelihood of drug use when adverse childhood experiences are prevalent. However...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2019.01.024
更新日期:2019-05-01 00:00:00
abstract:BACKGROUND:Research on the relation of stress to alcohol consumption is inconsistent regarding the direction of effects, and this association has been shown to vary by sex and type of stress. We sought to build upon the stress-drinking literature by examining the direction of the stress-drinking association over time a...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2010.10.022
更新日期:2011-06-01 00:00:00
abstract:BACKGROUND:With the emergence of illicit fentanyl, fentanyl-involved overdose rates increased from 2013 to 2017 in the United States (US). We describe US trends in opioid-related overdose mortality rates by race, age, urbanicity, and opioid type before and after the emergence of fentanyl. METHODS:Using the Centers for...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章
doi:10.1016/j.drugalcdep.2020.108321
更新日期:2020-11-01 00:00:00