Interaction of smoking and obesity susceptibility loci on adolescent BMI: The National Longitudinal Study of Adolescent to Adult Health

Citation

Young, K. L.; Graff, M.; North, K. E.; Richardson, A. S.; Mohlke, K. L.; Lange, L. A.; Lange, E. M.; Harris, K. M.; & Gordon-Larsen, P. (2015). Interaction of smoking and obesity susceptibility loci on adolescent BMI: The National Longitudinal Study of Adolescent to Adult Health. BMC Genetics. vol. 16 (1) pp. 131

Abstract

BACKGROUND: Adolescence is a sensitive period for weight gain and risky health behaviors, such as smoking. Genome-wide association studies (GWAS) have identified loci contributing to adult body mass index (BMI). Evidence suggests that many of these loci have a larger influence on adolescent BMI. However, few studies have examined interactions between smoking and obesity susceptibility loci on BMI. This study investigates the interaction of current smoking and established BMI SNPs on adolescent BMI. Using data from the National Longitudinal Study of Adolescent to Adult Health, a nationally-representative, prospective cohort of the US school-based population in grades 7 to 12 (12-20 years of age) in 1994-95 who have been followed into adulthood (Wave II 1996; ages 12-21, Wave III; ages 18-27), we assessed (in 2014) interactions of 40 BMI-related SNPs and smoking status with percent of the CDC/NCHS 2000 median BMI (%MBMI) in European Americans (n = 5075), African Americans (n = 1744) and Hispanic Americans (n = 1294). RESULTS: Two SNPs showed nominal significance for interaction (p < 0.05) between smoking and genotype with %MBMI in European Americans (EA) (rs2112347 (POC5): beta = 1.98 (0.06, 3.90), p = 0.04 and near rs571312 (MC4R): beta 2.15 (-0.03, 4.33) p = 0.05); and one SNP showed a significant interaction effect after stringent correction for multiple testing in Hispanic Americans (HA) (rs1514175 (TNNI3K): beta 8.46 (4.32, 12.60), p = 5.9E-05). Stratifying by sex, these interactions suggest a stronger effect in female smokers. CONCLUSIONS: Our study highlights potentially important sex differences in obesity risk by smoking status in adolescents, with those who may be most likely to initiate smoking (i.e., adolescent females), being at greatest risk for exacerbating genetic obesity susceptibility.

URL

http://dx.doi.org/10.1186/s12863-015-0289-6

Reference Type

Journal Article

Journal Title

BMC Genetics

Author(s)

Young, K. L.
Graff, M.
North, K. E.
Richardson, A. S.
Mohlke, K. L.
Lange, L. A.
Lange, E. M.
Harris, K. M.
Gordon-Larsen, P.

Year Published

2015

Volume Number

16

Issue Number

1

Pages

131

Edition

11/06

ISSN/ISBN

1471-2156

DOI

10.1186/s12863-015-0289-6

Reference ID

7770