Blood lipid response to a given dietary intervention could be determined by the effect of diet, gene variants or gene-diet interactions. The objective of the present study was to investigate whether variants in presumed nutrient-sensitive genes involved in lipid metabolism modified lipid profile after weight loss and in response to a given diet, among overweight European adults participating in the Diet Obesity and Genes study. By multiple linear regressions, 240 SNPs in twenty-four candidate genes were investigated for SNP main and SNP-diet interaction effects on total cholesterol, LDL-cholesterol, HDL-cholesterol and TAG after an 8-week low-energy diet (only main effect) ,and a 6-month ad libitum weight maintenance diet, with different contents of dietary protein or glycaemic index. After adjusting for multiple testing, a SNP-dietary protein interaction effect on TAG was identified for lipin 1 (LPIN1) rs4315495, with a decrease in TAG of 20.26 mmol/l per A-allele/protein unit (95% CI 20.38, 20.14, P=0.000043). In conclusion, we investigated SNP-diet interactions for blood lipid profiles for 240 SNPs in twenty-four candidate genes, selected for their involvement in lipid metabolism pathways, and identified one significant interaction between LPIN1 rs4315495 and dietary protein for TAG concentration.

Original publication

DOI

10.1017/S0007114512006058

Type

Journal article

Journal

Br J Nutr

Publication Date

14/09/2013

Volume

110

Pages

790 - 796

Keywords

Activating Transcription Factor 6, Adult, Cholesterol, HDL, Dietary Proteins, Fatty Acid-Binding Proteins, Female, Gene Expression Regulation, Glycemic Index, Humans, Lipid Metabolism, Lipids, Lipoprotein Lipase, Male, Nuclear Proteins, Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Phosphatidate Phosphatase, Polymorphism, Single Nucleotide, Transcription Factors