Volume 110, Issue 2 pp. 289-299
Research Report

Interaction effects between the 5-hydroxy tryptamine transporter-linked polymorphic region (5-HTTLPR) genotype and family conflict on adolescent alcohol use and misuse

Jueun Kim

Jueun Kim

Department of Psychology, Syracuse University, Syracuse, NY, USA

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Aesoon Park

Corresponding Author

Aesoon Park

Department of Psychology, Syracuse University, Syracuse, NY, USA

Correspondence to: Aesoon Park, Syracuse University, Department of Psychology, 430 Huntington Hall, Syracuse, NY 13244, USA. E-mail: [email protected]Search for more papers by this author
Stephen J. Glatt

Stephen J. Glatt

The Psychiatric Genetic Epidemiology and Neurobiology Laboratory, Medical Genetics Research Center, Department of Psychiatry and Behavioral Sciences and Neuroscience and Physiology, SUNY Upstate Medical University, Syracuse, NY, USA

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Tanya L. Eckert

Tanya L. Eckert

Department of Psychology, Syracuse University, Syracuse, NY, USA

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Peter A. Vanable

Peter A. Vanable

Department of Psychology, Syracuse University, Syracuse, NY, USA

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Lori A. J. Scott-Sheldon

Lori A. J. Scott-Sheldon

Centers for Behavioral and Preventive Medicine, The Miriam Hospital, Providence, RI, USA

Department of Psychiatry, Human Behavior, Alpert Medical School, Brown University, Providence, RI, USA

Department of Behavioral and Social Sciences, Brown University, School of Public Health, Providence, RI, USA

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Kate B. Carey

Kate B. Carey

Department of Behavioral and Social Sciences, Brown University, School of Public Health, Providence, RI, USA

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Craig K. Ewart

Craig K. Ewart

Department of Psychology, Syracuse University, Syracuse, NY, USA

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Michael P. Carey

Michael P. Carey

Centers for Behavioral and Preventive Medicine, The Miriam Hospital, Providence, RI, USA

Department of Psychiatry, Human Behavior, Alpert Medical School, Brown University, Providence, RI, USA

Department of Behavioral and Social Sciences, Brown University, School of Public Health, Providence, RI, USA

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First published: 08 October 2014
Citations: 7

Abstract

Aims

To investigate whether the effects of family conflict on adolescent drinking differed as a function of 5-hydroxy tryptamine transporter-linked polymorphic region (5-HTTLPR) genotype cross-sectionally and prospectively in two independent samples of adolescents.

Design

Path analysis and multi-group analysis of two prospective datasets were conducted.

Settings

United States and United Kingdom.

Participants

Sample 1 was 175 adolescents in the United States (mean age = 15 at times 1 and 2 with a 6-month interval); Sample 2 was 4916 adolescents in the United Kingdon (mean age = 12 at time 1 and 15 at time 2).

Measurements

In both samples, demographics, tri-allelic 5-HTTLPR genotype and perceived family conflict were assessed at time 1. Alcohol use (frequency of drinking) and alcohol misuse (frequency of intoxication, frequency of drinking three or more drinks, maximum number of drinks) were assessed at times 1 and 2.

Findings

A significant gene–environment interaction on alcohol misuse at time 1 was found in both sample 1 (β = 0.57, P = 0.001) and sample 2 (β = 0.19, P = 0.01), indicating that the 5-HTTLPR low-activity allele carriers exposed to higher levels of family conflict were more likely to engage in alcohol misuse than non-carriers. A significant gene–environment interaction effect on change in alcohol misuse over time was found only in sample 1 (β = 0.48, P = 0.04) but not in sample 2.

Conclusions

Compared with non-carriers, adolescents carrying the 5-HTTLPR low-activity allele are more susceptible to the effects of family conflict on alcohol misuse.

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