scholarly journals Genetic Variants in Lipid Metabolism Pathways Interact with Diet to Influence Blood Lipid Concentrations in Adults with Overweight and Obesity

2020 ◽  
Vol 13 (6) ◽  
pp. 155-163
Author(s):  
Bridget A. Hannon ◽  
Caitlyn G. Edwards ◽  
Sharon V. Thompson ◽  
Sarah K. Burke ◽  
Nicholas A. Burd ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Dietary Intake ◽  
Dietary Fat ◽  
Genetic Variants ◽  
Blood Lipid ◽  
Overweight And Obesity ◽  
Cardiometabolic Health ◽  
Fat Intake ◽  
Dietary Fat Intake ◽  
Increased Risk

<b><i>Introduction:</i></b> The effect of various types of dietary fat on cardiometabolic health continues to be debated, due in part to the high heterogeneity of results following clinical trials investigating the effects of saturated (SFA) and unsaturated fat intake. This variability may be due to genetic differences. Individuals with obesity are at an increased risk for adverse cardiometabolic health and dyslipidemia, and often present with the combined phenotype of elevated triglyceride (TG) and decreased high-density lipoprotein (HDL) cholesterol concentrations. Studying genetic variants relevant to lipid and lipoprotein metabolism can elucidate the mechanisms by which diet might interact with genotype to influence these phenotypes. The objective of this study was to determine relationships of genetic variation, dietary fat intake, and blood lipid concentrations in adults with overweight and obesity. <b><i>Methods:</i></b> Genomic DNA, blood lipid concentrations (HDL and TG), and 7-day diet records were obtained from 101 adults (25–45 years of age) with overweight or obesity. Resting energy expenditure (REE) was measured using indirect calorimetry and used to determine implausible intakes using a modified Goldberg method (kilocalories/REE). Genetic variants included 23 single-nucleotide polymorphisms (SNPs) from 15 genes in lipid metabolism pathways. Variants were analyzed with dietary fat intake (total fat, SFA, monounsaturated fat [MUFA], and polyunsaturated fat [PUFA]) via regression analyses. All models were adjusted for age, sex, ancestry, visceral adipose tissue mass, and total kilocalorie intake. The Bonferroni correction was applied for multiple comparisons. <b><i>Results:</i></b> Two interactions were detected for TG concentrations. Five gene-diet interactions were associated with HDL concentrations. There was a significant interaction detected between the rs5882 variant of cholesterol-esterase transfer protein (<i>CETP</i>) and MUFA intake to associate with TG concentrations (interaction <i>p</i> = 0.004, <i>R</i><sup>2</sup> = 0.306). Among carriers of the <i>CETP-</i>rs5882 major allele (G), TG concentrations were significantly lower in individuals consuming more than the median MUFA intake (31 g/day) than in those with an intake below the median. Total dietary fat intake interacted with the rs13702 polymorphism of lipoprotein lipase (<i>LPL</i>) to associate with HDL concentrations (interaction <i>p</i> = 0.041, <i>R</i><sup>2</sup> = 0.419), by which individuals with the risk allele (G) had significantly higher HDL concentrations when consuming a higher-fat diet (&#x3e;92 g/day) than those with a lower-fat diet (56 ± 3 vs. 46 ± 2 mg/dL, <i>p</i> = 0.033). <b><i>Conclusions:</i></b> Interactions between dietary intake and genes in lipid metabolism pathways were found to be associated with blood lipid concentrations in adults with overweight and obesity. Fatty acid intake may not modulate blood lipid concentrations uniformly across all individuals. Additional research is needed to determine the biological causes of individual variability in response to dietary intake. Understanding the influence of nutrigenetic interactions on dyslipidemia can aid in the development and implementation of personalized dietary strategies to improve health.

scholarly journals Genetic Variants in Lipid Metabolism Pathways Interact with Diet to Influence Blood Lipid Concentrations in Adults with Overweight and Obesity (P15-015-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Bridget Hannon ◽  
Caitlyn Edwards ◽  
Sharon Thompson ◽  
Nicholas Burd ◽  
Hannah Holscher ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Genetic Variants ◽  
Blood Lipid ◽  
Overweight And Obesity ◽  
Minor Allele ◽  
Cardiometabolic Health ◽  
Fat Intake ◽  
Nucleotide Polymorphisms ◽  
Monounsaturated Fat ◽  
Total Fat

Abstract Objectives There is substantial controversy regarding the role of saturated (SFA) and unsaturated fat intake for optimal cardiometabolic health due to the heterogeneity of blood lipid changes in clinical trials. This variance may be due to genetic differences. Studying physiologically relevant variants can elucidate the mechanisms between genotype and metabolism. The objective of this study was to determine relationships between genetic variation, fat intake, and blood lipid concentrations. Methods DNA, blood lipid concentrations (total cholesterol, high-density lipoprotein cholesterol [HDL], and triglycerides [TG]), and 7-day diet records were obtained from 87 adults (25–45 years) with overweight or obesity. Resting energy expenditure (REE) was measured using indirect calorimetry and used to determine implausible intake using a modified Goldberg method (kilocalories/REE). Genetic variants included 22 single nucleotide polymorphisms (SNPs) from genes in lipid metabolism pathways. Variants were analyzed with dietary fat intake (total fat, SFA, monounsaturated fat [MUFA], and polyunsaturated fat) via regression analyses. Results Nine SNPs (ANGPTL3 rs10889337, ANGPTL4 rs7255436, APOE rs1044250, CETP rs5882, FADS1 rs174548 and rs174550, LPL rs13702 and rs328, PPARG rs12639162) were associated with one or more blood lipid traits. Two significant diet-gene interactions were detected: the interaction of total fat intake and LPL rs13702 was associated with HDL concentrations (P = 0.01), and the interaction of MUFA intake and CETP rs5882 was associated with TG concentrations (P = 0.01). Carriers of the minor allele that reported higher total fat intake exhibited higher HDL concentrations, while minor allele carriers with higher MUFA intake exhibited lower TG concentrations. Conclusions Interactions between diet and genes in lipid metabolism pathways were predictors of blood lipid concentrations in adults. Fat intake may not affect blood lipid concentrations uniformly across all individuals. Therefore, personalized diet recommendations for chronic disease prevention are warranted. Funding Sources Support is provided by the Hass Avocado Board, the Division of Nutritional Sciences at the University of Illinois at Urbana-Champaign, the USDA National Institute of Food and Agriculture Hatch Project, and the Agriculture and Food Research Initiative. Supporting Tables, Images and/or Graphs

scholarly journals The effect of the amount and type of dietary fat on milk fat secretion in the cow

1967 ◽  
Vol 21 (2) ◽  
pp. 425-438 ◽  
Author(s):  
J. E. Storry ◽  
J. A. F. Rook ◽  
A. J. Hall
Keyword(s):  
Fatty Acids ◽  
Dietary Intake ◽  
Dietary Fat ◽  
Milk Fat ◽  
Total Yield ◽  
Basal Diet ◽  
Fat Intake ◽  
Groundnut Oil ◽  
Triglyceride Fraction ◽  
Dietary Fat Intake

1. Two experiments are described in which the effects of dietary fat on the synthesis of milk fat in the dairy cow have been investigated. In the first experiment a change-over design was used with two cows to study the effect of removing a mixed-oil supplement to a basal diet low in fat on the concentration and composition of plasma lipids and on the yield and composition of milk fat.2. Reducing the dietary fat intake from about 430 to 170 g/day caused falls in the concentrations in plasma of phospholipid and of free and esterified cholesterol and, in one cow, also of triglyceride. The changes in composition and concentration of the fatty acids in the plasma triglyceride fraction also reflected changes in dietary intake of fatty acids. No effect of dietary fat intake on the total synthesis of milk fat was observed, but the composition of the milk fat reflected that of the dietary fat, and the yields of lauric, myristic, stearic and oleic acids were decreased in association with a decreased dietary intake of these acids.3. In the second experiment the effect of supplementing a basal diet low in fat with either coconut, red palm or groundnut oil on the composition and yield of milk fat was studied in four cows using a 4 x 4 Latin square design balanced with respect to residual effects.4. With each oil, increasing the dietary fat intake from about 100 to 400 g/day significantly increased the total yield of milk fat. Also, coconut and red palm oils significantly increased the fat content of milk, and groundnut oil the yield of milk.5. With the exception of linoleic and palmitic acids, the increased dietary intake of the major fatty acids characteristic of the various oil supplements led to increased yields of these acids in the milk.

scholarly journals Influence of habitual high dietary fat intake on endothelium-dependent vasodilation

2015 ◽  
Vol 40 (7) ◽  
pp. 711-715 ◽  
Author(s):  
Caitlin A. Dow ◽  
Brian L. Stauffer ◽  
Jared J. Greiner ◽  
Christopher A. DeSouza
Keyword(s):  
Cardiovascular Risk ◽  
Sodium Nitroprusside ◽  
Dietary Fat ◽  
High Fat Diet ◽  
Heart Association ◽  
Underlying Mechanism ◽  
Fat Intake ◽  
High Fat ◽  
Dietary Fat Intake ◽  
Increased Risk

High-fat diets are associated with an increased risk of cardiovascular disease. A potential underlying mechanism for the increased cardiovascular risk is endothelial dysfunction. Nitric oxide (NO)-mediated endothelium-dependent vasodilation is critical in the regulation of vascular tone and overall vascular health. The aim of this study was to determine the influence of dietary fat intake on endothelium-dependent vasodilation. Forty-four middle-aged and older sedentary, healthy adults were studied: 24 consumed a lower fat diet (LFD; 29% ± 1% calories from fat) and 20 consumed a high-fat diet (HFD; 41% ± 1% calories from fat). Four-day diet records were used to assess fat intake, and classifications were based on American Heart Association guidelines (<35% of total calories from fat). Forearm blood flow (FBF) responses to acetylcholine, in the absence and presence of the endothelial NO synthase inhibitor NG-monomethyl-l-arginine (L-NMMA), as well as responses to sodium nitroprusside were determined by plethysmography. The FBF response to acetylcholine was lower (∼15%; P < 0.05) in the HFD group (4.5 ± 0.2 to 12.1 ± 0.8 mL/100 mL tissue/min) than in the LFD group (4.6 ± 0.2 to 14.4 ± 0.6 mL/100 mL tissue/min). L-NMMA significantly reduced the FBF response to acetylcholine in the LFD group (∼25%) but not in the HFD group. There were no differences between groups in the vasodilator response to sodium nitroprusside. These data indicate that a high-fat diet is associated with endothelium-dependent vasodilator dysfunction due, in part, to diminished NO bioavailability. Impaired NO-mediated endothelium-dependent vasodilation may contribute to the increased cardiovascular risk with high dietary fat intake.

scholarly journals Trends in Dietary Intake of Total Fat and Fatty Acids Among Korean Adolescents from 2007 to 2017

Nutrients ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 3073 ◽  
Author(s):  
SuJin Song ◽  
Jae Eun Shim
Keyword(s):  
Fatty Acids ◽  
Dietary Intake ◽  
Dietary Fat ◽  
Saturated Fatty Acids ◽  
Fat Intake ◽  
Survey Period ◽  
Korean Adolescents ◽  
Dietary Fat Intake ◽  
Total Fat ◽  
Over Time

We analyzed the trends in dietary intake of total fat and fatty acids among Korean adolescents during 2007–2017. A total of 6406 adolescents from the 2007–2017 Korea National Health and Examination Surveys were selected. Total fat and fatty acids intakes were calculated based on single 24-hour recall data and presented as grams (g) and percentage of energy intake (% kcal) across the survey period. Linear trends in intake across the survey period were compared using the multiple regression model. Total fat intake increased during the 11-year period from 54.3 g (21.7% kcal) to 61.8 g (25.2% kcal). Saturated fatty acids (SFA) and monounsaturated fatty acids (MUFA) intakes changed from 17.8 g (7.1% kcal) and 17.2 g (6.8% kcal) to 20.6 g (8.4% kcal) and 20.7 g (8.4% kcal) over time, respectively. For polyunsaturated fatty acids (PUFA), n-3 fatty acid intake did not change during the survey period. The proportions of individuals who had total fat and SFA above the recommendations increased across the survey period: 13.7% to 27.5% for total fat and 36.0% to 49.7% for SFA. Among Korean adolescents, dietary fat intake increased over time and the increases in SFA and MUFA intake were prominent. Monitoring dietary fat intake is helpful to suggest dietary guidelines and health policies.

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