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Ethanol-responsive brain region expression networks: implications for behavioral responses to acute ethanol in DBA/2J versus C57BL/6J mice.

Activation of the mesolimbic dopamine reward pathway by acute ethanol produces reinforcement and changes in gene expression that appear to be crucial to the molecular basis for adaptive behaviors and addiction. The inbred mouse strains DBA/2J and C57BL/6J exhibit contrasting acute behavioral responses to ethanol. We used oligonucleotide microarrays and bioinformatics methods to characterize patterns of gene expression in three brain regions of the mesolimbic reward pathway of these strains. Expression profiling included examination of both differences in gene expression 4 h after saline injection or acute ethanol (2 g/kg). Using a rigorous stepwise method for microarray analysis, we identified 788 genes differentially expressed in control DBA/2J versus C57BL/6J mice and 307 ethanol-regulated genes in the nucleus accumbens, prefrontal cortex, and ventral tegmental area. There were strikingly divergent patterns of ethanol-responsive gene expression in the two strains. Ethanol-responsive genes also showed clustering at discrete chromosomal regions, suggesting local chromatin effects in regulation. Ethanol-regulated genes were generally related to neuroplasticity, but regulation of discrete functional groups and pathways was brain region specific: glucocorticoid signaling, neurogenesis, and myelination in the prefrontal cortex; neuropeptide signaling and developmental genes, including factor Bdnf, in the nucleus accumbens; and retinoic acid signaling in the ventral tegmental area. Bioinformatics analysis identified several potential candidate genes for quantitative trait loci linked to ethanol behaviors, further supporting a role for expression profiling in identifying genes for complex traits. Brain region-specific changes in signaling and neuronal plasticity may be critical components in development of lasting ethanol behavioral phenotypes such as dependence, sensitization, and craving.

Animals↗

Problems of adjustment reported among a group of heroin addicts.

Many reports in the literature concerning the heroin addict and his addiction have been related to psychological tests and the personality and behavior among addicts. However, studies have not cited his adjustment problems. Forty-seven narcotic addicts were surveyed to determine their adjustment difficulties by an administration of the Mooney Problem Checklist. The results indicate that the most difficult areas of adjustment were related to personality, self-improvement, the home and family, and occupation. It was concluded that among these participating narcotic addicts, four areas were noted as frequent problems while five additional areas were reported as less of an adjustment difficulty.

Adaptation, Psychological↗

Confirmatory factor analysis of internet use and addiction.

The ever-changing nature of the Internet continues to fuel questions as to its benefits and possible drawbacks. One issue that is particularly problematic is the validity of claims that the Internet is addictive. The present study used a confirmatory factor analysis (CFA) on a data set of 527 participants using the same survey developed by Pratarelli et al. (1) We propose a theoretical model of the relationship between (1) Internet addiction, (2) a sexual factor, and (3) an Internet use factor. These three factors were tested using two structural equation models generated on LISREL. The CFA revealed that the three factors are not orthogonal to each other, but instead are related to some degree as one would expect if a supposed Internet addicted individual exhibited behaviors related to each factor. We next tested whether the addiction was the causal factor leaving the sex and User factors as endogenous (i.e., resulting from the addiction). The second structural equation tested the contrasting possibility that sex and User related activities were exogenous to the addiction factor (i.e., the addiction resulted from these two activities). The analysis revealed that model 1, where the addiction is the causal factor behind the sex and User factors, had a stronger model fit index. On the basis of these current data it appears that Internet addiction may involve an addictive performance profile which in turn leads to excessive behaviors that involve (1) use of the Internet for sexual purposes and (2) its functional usefulness for a variety of professional and personal goals.

Adolescent↗

The shifting sands of self: a framework for the experience of self in addiction.

The self is a common yet unclear theme in addiction studies. William James's model of self provides a framework to explore the experience of self. His model details the subjective and objective constituents, the sense of self-continuity through time, and the ephemeral and plural nature of the changing self. This exploration yields insights into the self that can be usefully applied to subjective experiences with psychoactive drugs of addiction. Results of this application add depth to the common understanding of self in addiction, acknowledge the importance of feelings and choice in the sense of self created in addiction experiences, and affirm the values salient to these interior experiences in addiction. These results suggest meaning derived from those values, and provide important background knowledge for the nurse interacting with these clients.

Behavior, Addictive↗

Mothering through addiction: a survival strategy among Puerto Rican addicts.

In this article, the importance of motherhood in the lives of Puerto Rican addicts is examined. Using a life history method, the authors interviewed 20 Latina females in various stages of recovery from addiction to crack-cocaine or heroin. Their lives as mothers took place in a context of poverty, marginalization, and abuse. Motherhood provided an identity and a line of work that grounded them amidst this dislocation. As their life options became more restricted over time, motherhood provided a lifeline through addiction and into recovery. While using drugs, they relied on a number of strategies to maintain mothering. In recovery, children became the markers of success in a treatment program. These findings challenge public images of female addicts as parents.

Adult↗

Training and fidelity monitoring of behavioral interventions in multi-site addictions research.

AIMS: Methods for the training and fidelity monitoring of behavioral interventions in multi-site addictions research are reviewed, including five published studies and seven ongoing studies sponsored by the National Institute on Drug Abuse-funded Clinical Trials Network. METHODS: Methods are categorized and reviewed consistent with a technology model of treatment delivery. Topics include: therapist selection, training, certification, and supervision; selection, training, and certification of supervisors; scales and processes used for monitoring of the quality of treatment; and processes followed to provide new training for replacement staff once trials have begun. RESULTS: The review reveals both a wide array of procedures and emerging standards for multi-site trials. Methodological weakness was observed with respect to limited empirical support for many adherence scales, little or no evaluation of supervisory processes, and no evaluation of re-training practices. CONCLUSIONS: Methods used in multi-site trials are important not only to ensure validity of those trials, but also to inform the wider dissemination of empirically based treatment into community agencies. Studies examining noted weaknesses are needed. Training and fidelity models that delegate responsibility to participating sites appear most relevant for establishing best practices for dissemination of behavioral interventions. The effectiveness of these distributed training and supervision models should be subjected to empirical study at a level of rigor comparable to the evaluation of their corresponding treatments.

Behavior↗

Net-generation attributes and seductive properties of the internet as predictors of online activities and internet addiction.

Born between 1977 and 1997, Net-generation is the first generation to grow up surrounded by home computers, video games, and the Internet. As children of the Baby Boomers, the Internet is the medium of choice for the Net-geners. Based on the assumption that Net-generation has unique characteristics, this study examined (1) how Net-geners addicted to the Internet differ from the non-addicted and (2) how these attributes, together with the seductive properties of the Internet, are related to Internet addiction. Data were gathered from a probability sample of 699 Net-geners between the ages of 16 and 24. Results show that Net-geners addicted to the Internet tend to be young female students. Being emotionally open on the Net and a heavy user of ICQ were most influential in predicting Net-geners' problematic use of the Internet. Addicted Net-geners are also strongly linked to the pleasure of being able to control the simulated world in online games. The finding reinforces previous research that "dependents" of the Internet spend most of their time in the synchronous communication environment engaging in interactive online games, chat rooms, and ICQ for pleasure-seeking or escape, while "non-dependents" use information-gathering functions available on the Internet. Furthermore, Internet addicts tend to watch television significantly less, indicating a displacement effect on traditional media use for the Net-generation.

Adolescent↗

Alprazolam-reinforced medication use in outpatients with anxiety.

The reinforcing effects of alprazolam were investigated in 14 patients who had generalized anxiety or panic disorder, but were not current users/abusers of other psychoactive substances. Using a double-blind outpatient choice procedure, color-coded alprazolam (0.5 mg) and placebo capsules were provided to patients for use 'as needed' in the treatment of anxiety symptoms. Comparisons of alprazolam and placebo during a 2 week sampling period in which placebo and alprazolam were available sequentially revealed no significant differences on measures of medication usage or anxiety levels, although alprazolam did increase subjective ratings of drug effects side effects. During a 4 week choice period, alprazolam was strongly preferred over placebo in 11 out of 14 patients indicating that alprazolam functioned as a reinforcer. Medication usage ranged from zero to 4.0 mg alprazolam in a day. Variations in daily medication-use were positively correlated with anxiety level fluctuations for a majority of patients. For a majority of patients, the results indicate that alprazolam functioned as a reinforcer without accompanying signs of abuse or addiction.

Adult↗

Violent behaviors associated with cocaine use: possible pharmacological mechanisms.

Violent behaviors are increasingly noted in clinical practice to be associated with cocaine use; however, few studies actually characterize these behaviors. Cocaine addicts who made self-inquiries for themselves to obtain information about the effects, diagnosis, and treatment of cocaine dependence were interviewed. The study examined in a structured telephone interview their violent behaviors associated with cocaine use. The types of violent behavior reported by these cocaine addicts ranged from minor psychological aggressions to major physical acts that included murder and rape. The pharmacological mechanisms underlying the induction of cocaine-associated violence may involve known neurotransmitter systems affected by cocaine. A possible explanation may be that cocaine acts in those areas of the brain, particularly the limbic system, that subserve aggressive and violent behaviors.

Adult↗