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Association of Protein Phosphatase PPM1G With Alcohol Use Disorder and Brain Activity During Behavioral Control in a Genome-Wide Methylation Analysis

Research output: Contribution to journalArticle

Barbara Ruggeri, Charlotte Nymberg, Eero Vuoksimaa, Anbarasu Lourdusamy, Cybele P Wong, Fabiana M Carvalho, Tianye Jia, Anna Cattrell, Christine Macare, Tobias Banaschewski, Gareth J Barker, Arun L W Bokde, Uli Bromberg, Christian Büchel, Patricia J Conrod, Mira Fauth-Bühler, Herta Flor, Vincent Frouin, Jürgen Gallinat, Hugh Garavan & 22 more Penny Gowland, Andreas Heinz, Bernd Ittermann, Jean-Luc Martinot, Frauke Nees, Zdenka Pausova, Tomáš Paus, Marcella Rietschel, Trevor Robbins, Michael N Smolka, Rainer Spanagel, Georgy Bakalkin, Jonathan Mill, Wolfgang H Sommer, Richard J Rose, Jia Yan, Fazil Aliev, Danielle Dick, Jaakko Kaprio, Sylvane Desrivières, Gunter Schumann, IMAGEN Consortium

Original languageEnglish
Pages (from-to)543-552
Number of pages10
JournalThe American Journal of Psychiatry
Volume172
Issue number6
Early online date18 May 2015
DOIs
Publication statusPublished - 1 Jun 2015

King's Authors

Abstract

OBJECTIVE: The genetic component of alcohol use disorder is substantial, but monozygotic twin discordance indicates a role for nonheritable differences that could be mediated by epigenetics. Despite growing evidence associating epigenetics and psychiatric disorders, it is unclear how epigenetics, particularly DNA methylation, relate to brain function and behavior, including drinking behavior.

METHOD: The authors carried out a genome-wide analysis of DNA methylation of 18 monozygotic twin pairs discordant for alcohol use disorder and validated differentially methylated regions. After validation, the authors characterized these differentially methylated regions using personality trait assessment and functional MRI in a sample of 499 adolescents.

RESULTS: Hypermethylation in the 3'-protein-phosphatase-1G (PPM1G) gene locus was associated with alcohol use disorder. The authors found association of PPM1G hypermethylation with early escalation of alcohol use and increased impulsiveness. They also observed association of PPM1G hypermethylation with increased blood-oxygen-level-dependent response in the right subthalamic nucleus during an impulsiveness task.

CONCLUSIONS: Overall, the authors provide first evidence for an epigenetic marker associated with alcohol consumption and its underlying neurobehavioral phenotype.

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