Abstract
Scope: Body weight responds variably to the intake of dairy foods. Genetic variation may contribute to inter-individual variability in associations between body weight and dairy consumption. Methods and results: A genome-wide interaction study to discover genetic variants that account for variation in BMI in the context of low-fat, high-fat and total dairy intake in cross-sectional analysis was conducted. Data from nine discovery studies (up to 25 513 European descent individuals) were meta-analyzed. Twenty-six genetic variants reached the selected significance threshold (p-interaction <10−7), and six independent variants (LINC01512-rs7751666, PALM2/AKAP2-rs914359, ACTA2-rs1388, PPP1R12A-rs7961195, LINC00333-rs9635058, AC098847.1-rs1791355) were evaluated meta-analytically for replication of interaction in up to 17 675 individuals. Variant rs9635058 (128 kb 3’ of LINC00333) was replicated (p-interaction = 0.004). In the discovery cohorts, rs9635058 interacted with dairy (p-interaction = 7.36 × 10−8) such that each serving of low-fat dairy was associated with 0.225 kg m−2 lower BMI per each additional copy of the effect allele (A). A second genetic variant (ACTA2-rs1388) approached interaction replication significance for low-fat dairy exposure. Conclusion: Body weight responses to dairy intake may be modified by genotype, in that greater dairy intake may protect a genetic subgroup from higher body weight.
| Original language | English |
|---|---|
| Article number | 1700347 |
| Journal | Molecular Nutrition and Food Research |
| Volume | 62 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 1 2018 |
Bibliographical note
Publisher Copyright:© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Funding
Complete funding information is located in the Supporting Information, Table 8. B. P. serves on the DSMB of a clinical trial funded by the manufacturer (Zoll LifeCor) and on the Steering Committee of the Yale Open Data Access Project funded by Johnson & Johnson. M. N.’ participation is supported by a consulting contract between Kelly Services and the National Institute on Aging, NIH, Bethesda, MD, USA. Young Finns Study: The expert technical assistance in the statistical analyses by Irina Lisinen and Mika Helminen is gratefully acknowledged.
| Funders | Funder number |
|---|---|
| Contractor/consultant with Kelly Services | |
| National Institutes of Health (NIH) | |
| National Institute on Aging | |
| National Center for Advancing Translational Sciences (NCATS) | KL2TR001109 |
| National Center for Advancing Translational Sciences (NCATS) |
Keywords
- CHARGE consortium
- body mass index
- dairy intake
- genome-wide interaction study
- meta-analysis
ASJC Scopus subject areas
- Biotechnology
- Food Science