Interaction of PPARG Pro12Ala with dietary fat influences plasma lipids in subjects at cardiometabolic risk

AlSaleh, A, O'Dell, SD, Frost, GS, Griffin, BA, Lovegrove, JA, Jebb, SA and Sanders, TAB (2011) Interaction of PPARG Pro12Ala with dietary fat influences plasma lipids in subjects at cardiometabolic risk Journal of Lipid Research, 52 (12). 2298 - 2303. ISSN 0022-2275

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Abstract

Objective: The PPARG SNP rs1801282 (Pro12Ala C>G) has shown variable association with metabolic syndrome traits in healthy subjects. We investigated genotype association with plasma lipids and the influence of dietary polyunsaturated:saturated fat ratio (P:S) in subjects at increased cardiometabolic risk. Methods: Habitual dietary intake was recorded at recruitment to the RISCK Study. PPARG rs1801282 was genotyped in 466 subjects aged 30-70 y. Genotype associations with plasma lipids were assessed at recruitment, after a 4-wk high-SFA (HS) diet and a 24-wk intervention with reference (HS), high-MUFA (HM) and low-fat (LF) diets. The interaction of habitual P:S intake x genotype on plasma lipid concentrations was investigated. Results: PPARG rs1801282 G-allele frequency was 0.09. At recruitment, G-allele carriers had higher plasma total cholesterol concentration (n=415; P=0.05) after adjustment for BMI, gender, age and ethnicity. Dietary P:S ratio x genotype interaction influenced plasma LDLcholesterol (P=0.02) and triglyceride (P=0.03) concentrations. At P:S ratio 0.33, mean LDLcholesterol concentration in G-allele carriers was higher than in non-carriers, but fell between 0.34-0.65. Triglyceride concentration followed a similar pattern. After the 4-wk HS diet, Gallele carriers had higher concentrations of total cholesterol (P=0.03), LDL-cholesterol (P=0.04) and apo B (P=0.04) than non-carriers, after adjustments. After the 24-wk interventions, diet x genotype interaction did not significantly influence either LDLcholesterol (P=0.58) or triglyceride (P=0.57) concentrations. Conclusion: A high dietary P:S ratio would help to reduce plasma LDL-cholesterol and triglyceride concentrations in PPARG rs1801282 G-allele carriers at increased cardiometabolic risk.

Item Type:	Article
Additional Information:	This research was originally published in Journal of Lipid Research. AlSaleh A, O'Dell SD, Frost GS, Griffin BA, Lovegrove JA, Jebb SA, Sanders TAB. Interaction of PPARG Pro12Ala with dietary fat influences plasma lipids in subjects at cardiometabolic risk. Journal of Lipid Research. 2011. 52(12): 2298-2303. © the American Society for Biochemistry and Molecular Biology
Divisions:	Faculty of Health and Medical Sciences > Nutrition and Metabolism
Depositing User:	Symplectic Elements
Date Deposited:	22 Jun 2012 11:50
Last Modified:	23 Sep 2013 19:09
URI:	http://epubs.surrey.ac.uk/id/eprint/191641

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