Associations of the SREBP-1c gene polymorphism with gender-specific changes in serum lipids induced by a high-carbohydrate diet in healthy Chinese youth
We investigated the possible association between the sterol regulatory element-binding protein-1c gene (SREBP-1c) rs2297508 polymorphism and the changes in lipid profiles in a high-carbohydrate and low-fat (high-CHO/LF) diet in a Chinese population well characterized by a lower
incidence of coronary heart disease and a diet featuring higher carbohydrate and lower fat. Fifty-six healthy youth (aged 22.89 ± 1.80 years) were given wash-out diets of 31% fat and 54% carbohydrate for 7 days, followed by the high-CHO/LF diet of 15% fat and 70% carbohydrate
for 6 days, without total energy restriction. Fasting blood samples were collected. Serum variables of lipid and glucose metabolism after the wash-out and high-CHO/LF diets, as well as the rs2297508 polymorphism, were analyzed. Compared with the male subjects on the wash-out diet, significantly
elevated levels of high-density lipoprotein cholesterol (HDL-C) and decreased levels of apolipoprotein B-100 were observed in the male carriers of the C allele after the high-CHO/LF diet. In the female subjects, significantly increased triacylglycerol levels, insulin, and homeostasis model
assessment of insulin resistance (HOMA-IR) were found in the GG genotype after the high-CHO/LF diet. These results suggest that the C allele of the rs2297508 polymorphism is associated with a retardation of the increases in serum triacylglycerol, serum insulin, and HOMA-IR in females and with
the elevated serum HDL-C in males after the high-CHO/LF diet.
Keywords: alimentation personnalisée; coronaropathie; coronary heart disease; hypertriacylglycerolemia; hypertriacylglycérolémie; personalized nutrition; protéine SREBP-1c; sterol regulatory element-binding protein-1c
Document Type: Research Article
Affiliations: 1: Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine and State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, P.R. China. 2: Department of Thoracic and Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu 610041, P.R. China. 3: School of Medicine, Deakin University, Waurn Ponds, Victoria 3217, Australia.
Publication date: 13 April 2011
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