Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Email this article to a Colleague Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to My Articles & Searches Download to citation manager Citing Articles via HighWire Citing Articles via Google Scholar Articles by Arbelle, S. Articles by Ebstein, R. P. Search for Related Content PubMed Citation Articles by Arbelle, S. Articles by Ebstein, R. P. Child/Adolescent Psychiatry Autism Obsessive-Compulsive Disorder Phobic Disorders Genetics

Relation of Shyness in Grade School Children to the Genotype for the Long Form of the Serotonin Transporter Promoter Region Polymorphism

OBJECTIVE: Studies have shown that genetic factors are significant in predisposing individuals to shyness and social phobia. Toward further elucidating the genetic structure of shyness, the authors examined four functional polymorphisms that make biological sense for contributing to the development of this phenotype: serotonin transporter promoter region 44 base pair insertion/deletion (5-HTTLPR), dopamine D₄ receptor exon III repeat (DRD4), catechol O-methyltransferase (COMT), and monoamine oxidase A promoter region repeat (MAO_A). METHOD: The authors assessed shyness after recruitment of a nonclinical sample (N=118, unscreened second-grade children) using a composite scale derived from questionnaires administered to the children, parents, and teachers. DNA from buccal smears successfully obtained from 98 children was genotyped by polymerase chain reaction methods for the 5-HTTLPR, DRD4, COMT, and MAO_A polymorphisms. RESULTS: Significant correlations were observed for parents’, teachers’, and children’s ratings of shyness, and Cronbach’s alpha reliability was high for all three scales. A significant association was observed between the long 5-HTTLPR polymorphism and shyness, both by the functional classification of Lesch as well as by consideration of all three genotypes. No significant association was observed for the DRD4, COMT, or MAO_A polymorphisms. CONCLUSIONS: This study provisionally identifies a common genetic polymorphism, 5-HTTLPR, that modestly (effect size=7%) contributed to greater shyness scores in a nonclinical group of second-grade students. These first findings may be relevant to previous reports that have shown an association between the 5-HTTLPR long form and obsessive-compulsive disorder and autism.

This article has been cited by other articles:

				N. J. van der Wee, J. F. van Veen, H. Stevens, I. M. van Vliet, P. P. van Rijk, and H. G. Westenberg Increased Serotonin and Dopamine Transporter Binding in Psychotropic Medication-Naive Patients with Generalized Social Anxiety Disorder Shown by 123I-{beta}-(4-Iodophenyl)-Tropane SPECT J. Nucl. Med., May 1, 2008; 49(5): 757 - 763. [Abstract] [Full Text] [PDF]

				C. W. Brune, S.-J. Kim, J. Salt, B. L. Leventhal, C. Lord, and E. H. Cook Jr. 5-HTTLPR Genotype-Specific Phenotype in Children and Adolescents With Autism Am J Psychiatry, December 1, 2006; 163(12): 2148 - 2156. [Abstract] [Full Text] [PDF]

				M. Battaglia, A. Ogliari, A. Zanoni, A. Citterio, U. Pozzoli, R. Giorda, C. Maffei, and C. Marino Influence of the Serotonin Transporter Promoter Gene and Shyness on Children's Cerebral Responses to Facial Expressions Arch Gen Psychiatry, January 1, 2005; 62(1): 85 - 94. [Abstract] [Full Text] [PDF]

				N. H. KALIN and S. E. SHELTONA Nonhuman Primate Models to Study Anxiety, Emotion Regulation, and Psychopathology Ann. N.Y. Acad. Sci., December 1, 2003; 1008(1): 189 - 200. [Abstract] [Full Text] [PDF]

				J. Arehart-Treichel Clues to Shyness May Lie in Our Genes Psychiatr News, May 2, 2003; 38(9): 51 - 51. [Full Text]

Get information about faster international access.

Privacy Policy

Copyright © 2003 American Psychiatric Association. All rights reserved.

Home | Search | Current Issue | Past Issues | Subscribe | All APPI Journals | Help | Contact Us