title: DRD4 gene variant associated with body mass: the National Longitudinal Study of Adolescent Health.
abstract: In this article we report a novel statistically significant association between the D4.7/D4.7 genotype of the DRD4 gene and the body mass of black and Hispanic participants in the National Longitudinal Study of Adolescent Health (Add Health). We investigated the role of the 48-bp repeat polymorphism of the dopamine receptor 4 gene (DRD4) in body mass regulation in 2,277 adolescents and young adults followed in 1995 (12-18 years old), 1996, and 2002 by Add Health. After the effects of age, sex, and ethnicity were adjusted, the D4.7/D4.7 genotype reduced the body mass index (BMI)-percentile score by 15 and 12.5, as compared to those with other genotypes, for African-Americans (P = 0.0047) and Hispanic-Americans (P = 0.037), respectively. Although the D4.7/D4.7 genotype was associated with a lower BMI-percentile score in white individuals compared to other genotypes, the difference was not significant. Individuals heterozygous for D4.7 did not differ from those with the other/other genotype.
authors.affiliation: Carolina Population Center, University of North Carolina, Chapel Hill, North Carolina 27599-3210, USA. guang_guo@unc.edu
authors.forename: Guang
authors.initials: G
authors.lastname: Guo
authors.forename: Kari
authors.initials: K
authors.lastname: North
authors.forename: Seulki
authors.initials: S
authors.lastname: Choi
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000483:Alleles; D044383:Black People; D015992:Body Mass Index; D002648:Child; D005260:Female; D005838:Genotype; D006720:Homozygote; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D050638:Receptors, Dopamine D4 / Q000235:genetics*; D012737:Sex Factors; D035781:Siblings; D044465:White People; D001741:Black or African American
chemical_list: C493599:DRD4 protein, human; D050638:Receptors, Dopamine D4