Influence of SNPs in nutrient-sensitive candidate genes and gene-diet interactions on blood lipids: the DiOGenes study.

Journal article

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.

Authors: Brahe, L; Ängquist, L; Larsen, L; Vimaleswaran, K; Hager, J

• Publication status: Published
• Journal: British journal of nutrition
• Volume: 110
• Issue: 5
• Pages: 790-796
• Publication date: 2013-09-01
• DOI: 10.1017/s0007114512006058
• EISSN: 1475-2662
• ISSN: 0007-1145
• Language: English
• Keywords: Activating Transcription Factor 6; Transcription Factors; Nuclear Proteins; Dietary Proteins; Lipid Metabolism; Glycemic Index; Humans; Male; Adult; Cholesterol, HDL; Lipids; Polymorphism, Single Nucleotide; Fatty Acid-Binding Proteins; Phosphatidate Phosphatase; Gene Expression Regulation; Lipoprotein Lipase; Female