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Brain morphology at entry into treatment for alcohol dependence is related to relapse propensity.

ABSTRACT: We examined whether any differences in brain volumes at entry into alcohol dependence treatment differentiate subsequent Abstainers from Relapsers.Individuals in alcohol dependence treatment (n = 75) underwent magnetic resonance imaging approximately 6 ± 4 days after their last alcoholic drink, and 40 age-matched nonsmoking light drinkers (LD) were studied as control subjects. At follow-up 7.8 ± 2.6 months later, 23 alcoholics (31%) had abstained from drinking and 52 (69%) had relapsed. Deformation morphometry compared Relapsers, Abstainers, and LD.Compared with LD, future Abstainers had smaller brain tissue volumes in the left amygdala, hippocampal head, and entorhinal cortex and bilaterally in the thalamus and adjacent subcortical white matter (WM) and had larger volume in the left lateral orbitofrontal region. Compared with LD, future Relapsers had smaller brain tissue volumes in the right middle temporal, occipital, and superior frontal WM. Compared with future Abstainers, future Relapsers had smaller tissue volumes primarily in bilateral orbitofrontal cortex and surrounding WM. Results were virtually unaffected after controlling for common comorbidities.At entry into alcohol dependence treatment, the brain structure of future Relapsers differs from that of future Abstainers. Future Relapsers have smaller brain volumes in regions of the mesocorticolimbic reward system that are critically involved in impulse control, emotional regulation, craving, and evaluation and anticipation of stimulus salience and hedonics. Structural abnormalities of this circuitry might confer greater risk for resumption of hazardous drinking after treatment and might contribute to the definition of a neurobiological relapse risk profile in alcohol dependence.

SUBMITTER: Cardenas VA

PROVIDER: S-EPMC3162109 | biostudies-literature | 2011 Sep

REPOSITORIES: biostudies-literature

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Brain morphology at entry into treatment for alcohol dependence is related to relapse propensity.

Cardenas Valerie A VA Durazzo Timothy C TC Gazdzinski Stefan S Mon Anderson A Studholme Colin C Meyerhoff Dieter J DJ

Biological psychiatry 20110520 6

<h4>Background</h4>We examined whether any differences in brain volumes at entry into alcohol dependence treatment differentiate subsequent Abstainers from Relapsers.<h4>Methods</h4>Individuals in alcohol dependence treatment (n = 75) underwent magnetic resonance imaging approximately 6 ± 4 days after their last alcoholic drink, and 40 age-matched nonsmoking light drinkers (LD) were studied as control subjects. At follow-up 7.8 ± 2.6 months later, 23 alcoholics (31%) had abstained from drinking ...[more]

PMID: 21601177

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Project description:The purpose of this study was to examine relationships between genetic markers of central serotonin (5-HT) and dopamine function, and risk for post-treatment relapse, in a sample of alcohol-dependent patients.The study included 154 patients from addiction treatment programs in Poland, who met DSM-IV criteria for alcohol dependence. After assessing demographics, severity of alcohol use, suicidality, impulsivity, depression, hopelessness, and severity of alcohol use at baseline, patients were followed for approximately 1 year to evaluate treatment outcomes. Genetic polymorphisms in several genes (TPH2, SLC6A4, HTR1A, HTR2A, COMT, and BDNF) were tested as predictors of relapse (defined as any drinking during follow-up) while controlling for baseline measures.Of 154 eligible patients, 123 (80%) completed follow-up and 48% (n = 59) of these individuals relapsed. Patients with the Val allele in the Val66Met BDNF polymorphism and the Met allele in the Val158Met COMT polymorphism were more likely to relapse. Only the BDNF Val/Val genotype predicted post-treatment relapse [odds ratio (OR) = 2.62; p = 0.019], and time to relapse (OR = 2.57; p = 0.002), after adjusting for baseline measures and other significant genetic markers. When the analysis was restricted to patients with a family history of alcohol dependence (n = 73), the associations between the BDNF Val/Val genotype and relapse (OR = 5.76, p = 0.0045) and time to relapse (hazard ratio = 4.93, p = 0.001) were even stronger.The Val66Met BDNF gene polymorphism was associated with a higher risk and earlier occurrence of relapse among patients treated for alcohol dependence. The study suggests a relationship between genetic markers and treatment outcomes in alcohol dependence. Because a large number of statistical tests were conducted for this study and the literature on genetics and relapse is so novel, the results should be considered as hypothesis generating and need to be replicated in independent studies.

Project description:BackgroundThe tradition of consuming alcohol has long been a part of Italian culture and is responsible for a large health burden. This burden may be reduced with effective interventions, one of the more important of which is treatment for Alcohol Dependence (AD). The aim of this article is to estimate the burden of disease in Italy attributable to alcohol consumption, heavy alcohol consumption, and AD. An additional aim of this paper is to examine the effects of increasing the coverage of treatment for AD on the alcohol-attributable burden of disease.MethodsAlcohol-attributable deaths and the effects of treatments for AD were estimated using alcohol-attributable fractions and simulations. Deaths, potential years of life lost, years lived with disability, and disability adjusted life years lost were obtained for 2004 for Italy and for the European Union from the Global Burden of Disease study. Alcohol consumption data were obtained from the Global Information System on Alcohol and Health. The prevalences of current drinkers, former drinkers, and lifetime abstainers were obtained from the GENder Alcohol and Culture International Study. The prevalence of AD was obtained from the World Mental Health Survey. Alcohol relative risks were obtained from various meta-analyses.Results5,320 deaths (1,530 female deaths; 3,790 male deaths) or 5.9% of all deaths (4.9% of all female deaths; 6.3% of all male deaths) of people 15 to 64 years of age were estimated to be alcohol-attributable. Of these deaths, 74.5% (61.3% for females; 79.8% for males) were attributable to heavy drinking, and 26.9% (25.6% for females; 27.5% for males) were attributable to AD. Increasing pharmacological AD treatment coverage to 40% would result in an estimated reduction of 3.3% (50 deaths/year) of all female and 7.6% (287 deaths/year) of all male alcohol-attributable deaths.ConclusionsAlcohol was responsible for a large proportion of the burden of disease in Italy in 2004. Increasing treatment coverage for AD in Italy could reduce that country's alcohol-attributable burden of disease.

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Brain morphology at entry into treatment for alcohol dependence is related to relapse propensity.

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Brain morphology at entry into treatment for alcohol dependence is related to relapse propensity.

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