title: The Trp(64)Arg polymorphism of the beta(3)-adrenergic receptor gene is not associated with body weight or body mass index in Japanese: a longitudinal analysis.
abstract: The beta(3)-adrenergic receptor (ADRB3) is expressed mainly in visceral adipose tissue and is thought to contribute to lipolysis and the delivery of free fatty acids to the portal vein. Although many studies have examined the relationship between the Trp(64)Arg mutation of ADRB3 and obesity, the results have been inconsistent. We examined the cross-sectional relationship of ADRB3 variants with indexes of obesity, and their longitudinal changes over 10 yr, in men and women, aged 40-69 yr, who were randomly selected from the Japanese rural population. The study considered both dietary energy intake and physical activity levels. Among the 746 participants, the genotype frequencies of the Trp(64)Trp, Trp(64)Arg, and Arg(64)Arg variants were 483, 224, and 39, respectively. The cross-sectional analysis showed no significant differences in height, weight, body mass index, blood pressure, serum total and high density lipoprotein cholesterols, and hemoglobin A(1c) among the genotype groups even after adjustments for gender, age, smoking, alcohol drinking, physical activity, and energy intake. No significant differences in the weight changes between the genotype groups were evident in the longitudinal analysis. We conclude that the Trp(64)Arg mutation of ADRB3 has little or no influence on either body weight or body mass index in the general Japanese population.
authors.affiliation: Graduate School, Tokyo Medical and Dental University, Tokyo 101-0062, Japan. ym.hcm@tmd.ac.jp
authors.forename: Yumi
authors.initials: Y
authors.lastname: Matsushita
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Yokoyama
authors.forename: Nobuo
authors.initials: N
authors.lastname: Yoshiike
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Matsumura
authors.forename: Chigusa
authors.initials: C
authors.lastname: Date
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kawahara
authors.forename: Heizo
authors.initials: H
authors.lastname: Tanaka
mesh_terms: D000328:Adult; D000368:Aged; D001120:Arginine / Q000235:genetics; D044466:Asian People / Q000235:genetics*; D015992:Body Mass Index; D001835:Body Weight / Q000235:genetics*; D003430:Cross-Sectional Studies; D005260:Female; D005838:Genotype; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D022702:Receptors, Adrenergic, beta-3 / Q000235:genetics*; D014364:Tryptophan / Q000235:genetics
chemical_list: D022702:Receptors, Adrenergic, beta-3; D014364:Tryptophan; D001120:Arginine