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Courville AB, Majchrzak-Hong S, Yang S, Turner S, Wilhite B, Ness Shipley K, Horneffer Y, Domenichiello AF, Schwandt M, Cutler RG, Chen KY, Hibbeln JR, Ramsden CE. Dietary linoleic acid lowering alone does not lower arachidonic acid or endocannabinoids among women with overweight and obesity: A randomized, controlled trial. Lipids 2023; 58:271-284. [PMID: 38100748 PMCID: PMC10767670 DOI: 10.1002/lipd.12382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/23/2023] [Accepted: 11/02/2023] [Indexed: 12/17/2023]
Abstract
The linoleic acid (LA)-arachidonic acid (ARA)-inflammatory axis suggests dietary LA lowering benefits health because it lowers ARA and ARA-derived endocannabinoids (ECB). Dietary LA reduction increases concentrations of omega-3 eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and DHA derived ECB. The aim of this study was to examine targeted reduction of dietary LA, with and without EPA and DHA, on plasma EPA and DHA and ECB (2-arachidonoyl glycerol [2-AG], anandamide [AEA], and docosahexaenoyl ethanolamide [DHA-EA]). Healthy, pre-menopausal women (n = 62, BMI 30 ± 3 kg/m2 , age 35 ± 7 years; mean ± SD) were randomized to three 12-week controlled diets: (1) high LA, low omega-3 EPA and DHA (H6L3); (2) low LA, low omega-3 EPA and DHA (L6L3); or (3) low LA, high omega-3 EPA and DHA (L6H3). Baseline plasma fatty acids and ECB were similar between diets. Starting at 4 weeks, L6L3 and L6H3 lowered plasma LA compared to H6L3 (p < 0.001). While plasma ARA changed from baseline by 8% in L6L3 and -8% in L6H3, there were no group differences. After 4 weeks, plasma EPA and DHA increased from baseline in women on the L6H3 diet (ps < 0.001) and were different than the H6L3 and L6L3 diets. No differences were found between diets for AEA or 2-AG, however, in L6L3 and L6H3, AEA increased by 14% (ps < 0.02). L6H3 resulted in 35% higher DHA-EA (p = 0.013) whereas no changes were seen with the other diets. Lowering dietary LA did not result in the expected changes in fatty acids associated with the LA-ARA inflammatory axis in women with overweight and obesity.
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Affiliation(s)
- Amber B Courville
- National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Sharon Majchrzak-Hong
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Shanna Yang
- National Institutes of Health, Clinical Center, Bethesda, Maryland, USA
| | - Sara Turner
- National Institutes of Health, Clinical Center, Bethesda, Maryland, USA
| | - Breanne Wilhite
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Katherine Ness Shipley
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Yvonne Horneffer
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Anthony F Domenichiello
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
- National Institutes of Health, National Institute of Neurological Disorders and Stroke, Bethesda, Maryland, USA
| | - Melanie Schwandt
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Roy G Cutler
- National Institutes of Health, National Institute on Aging, Bethesda, Maryland, USA
| | - Kong Y Chen
- National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Joseph R Hibbeln
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
| | - Christopher E Ramsden
- National Institutes of Health, National Institute on Alcohol Abuse and Alcoholism, Bethesda, Maryland, USA
- National Institutes of Health, National Institute on Aging, Bethesda, Maryland, USA
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Chiusolo S, Bork CS, Gentile F, Lundbye-Christensen S, Harris WS, Schmidt EB, De Caterina R. Adipose tissue n-3/n-6 fatty acids ratios versus n-3 fatty acids fractions as predictors of myocardial infarction. Am Heart J 2023; 262:38-48. [PMID: 37086938 DOI: 10.1016/j.ahj.2023.03.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Tissue levels of n-3 polyunsaturated fatty acids (PUFAs) have been inversely related with risk of myocardial infarction (MI). Whether ratios of n-3 to n-6 PUFAs, reflecting both dietary intake of n-3 PUFAs and competing n-6 PUFAs, are better predictors of future MI than n-3 PUFA fractions is unclear. We aimed at investigating whether such ratios in adipose tissue better predict MI than n-3 PUFA fractions. METHODS Subcutaneous adipose tissue biopsies were obtained in a random sample (n=3,500) of the Diet, Cancer and Health cohort (n=57,053). Adipose tissue content of eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA), docosahexaenoic acid (DHA), alpha-linolenic acid (ALA), arachidonic acid (AA) and linoleic acid (LA) was determined using gas chromatography. Fractions of selected n-3 PUFAs and n-3/n-6 PUFA ratios were correlated to the 15-year occurrence of MI in a case-cohort design. RESULTS A total of 2,406 participants experienced an MI during follow-up. Adipose tissue total marine n-3 PUFAs, EPA+DHA, EPA, EPA/AA, DHA/AA and (EPA+DPA+DHA)/AA were all inversely associated with risk of incident MI. Evaluating the predictive power (Harrel's C-index) of the selected metrics, fractions of marine n-3 PUFAs and ratios of EPA/AA, DHA/AA, (EPA+DHA)/AA and (EPA+DPA+DHA)/AA all refined risk prediction over age and sex alone. At multivariable analyses, however, the above ratios were the only metrics providing additional risk prediction. Differences in ratios were related to differences in food intake. CONCLUSIONS Both adipose tissue n-3 PUFAs fractions and ratios of n-3 PUFAs/AA were associated with a lower occurrence of MI, but ratios provided superior risk prediction. Dietary strategies affecting n-3/n-6 PUFA ratios should be further investigated for prediction of MI with dietary interventions at the population level and in intervention studies.
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Affiliation(s)
- Simona Chiusolo
- Cardiology Division, University of Modena and Reggio Emilia, Modena Hospital, Modena, Italy
| | | | - Francesco Gentile
- Cardiology Division, Pisa University Hospital and University of Pisa, Pisa, Italy
| | - Søren Lundbye-Christensen
- Department of Clinical Medicine, Aalborg University, Aalborg, Denmark; Unit of Clinical Biostatistics, Aalborg University Hospital, and Department of Clinical Medicine-Aalborg University, Aalborg, Denmark
| | - William S Harris
- Fatty Acid Research Institute and the Department of Internal Medicine, Sanford School of Medicine, University of South Dakota, Sioux Falls, South Dakota, U.S.A
| | - Erik Berg Schmidt
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Raffaele De Caterina
- Cardiology Division, Pisa University Hospital and University of Pisa, Pisa, Italy.
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Ruscica M, Sirtori CR, Carugo S, Calder PC, Corsini A. OMEGA-3 AND CARDIOVASCULAR PREVENTION – IS THIS STILL A CHOICE? Pharmacol Res 2022; 182:106342. [DOI: 10.1016/j.phrs.2022.106342] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/01/2022] [Accepted: 07/01/2022] [Indexed: 02/07/2023]
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Chacko S, Mamas MA, El-Omar M, Simon D, Haseeb S, Fath-Ordoubadi F, Clarke B, Neyses L, Dunn WB. Perturbations in cardiac metabolism in a human model of acute myocardial ischaemia. Metabolomics 2021; 17:76. [PMID: 34424431 PMCID: PMC8382649 DOI: 10.1007/s11306-021-01827-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 07/29/2021] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Acute myocardial ischaemia and the transition from reversible to irreversible myocardial injury are associated with abnormal metabolic patterns. Advances in metabolomics have extended our capabilities to define these metabolic perturbations on a metabolome-wide scale. OBJECTIVES This study was designed to identify cardiac metabolic changes in serum during the first 5 min following early myocardial ischaemia in humans, applying an untargeted metabolomics approach. METHODS Peripheral venous samples were collected from 46 patients in a discovery study (DS) and a validation study (VS) (25 for DS, 21 for VS). Coronary sinus venous samples were collected from 7 patients (4 for DS, 3 for VS). Acute myocardial ischaemia was induced by transient coronary occlusion during percutaneous coronary intervention (PCI). Plasma samples were collected at baseline (prior to PCI) and at 1 and 5 min post-coronary occlusion. Samples were analyzed by Ultra Performance Liquid Chromatography-Mass Spectrometry in an untargeted metabolomics approach. RESULTS The study observed changes in the circulating levels of metabolites at 1 and 5 min following transient coronary ischaemia. Both DS and VS identified 54 and 55 metabolites as significant (P < 0.05) when compared to baseline levels, respectively. Fatty acid beta-oxidation and anaerobic respiration, lysoglycerophospholipids, arachidonic acid, docosahexaenoic acid, tryptophan metabolism and sphingosine-1-phosphate were identified as mechanistically important. CONCLUSION Using an untargeted metabolomics approach, the study identified important cardiac metabolic changes in peripheral and coronary sinus plasma, in a human model of controlled acute myocardial ischaemia. Distinct classes of metabolites were shown to be involved in the rapid cardiac response to ischemia and provide insights into diagnostic and interventional targets.
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Affiliation(s)
- Sanoj Chacko
- Division of Cardiology, Queen's University, Kingston, ON, Canada.
- Institute of Cardiovascular Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK.
- Keele Cardiovascular Research Group, Keele University, Stoke-on-Trent, UK.
- Manchester Heart Centre, Manchester Royal Infirmary, Central Manchester University Hospitals NHS Trust, Manchester, UK.
- Kingston Health Sciences Centre, Queen's University, 76 Stuart St, Kingston, ON, Canada.
| | - Mamas A Mamas
- Institute of Cardiovascular Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Keele Cardiovascular Research Group, Keele University, Stoke-on-Trent, UK
| | - Magdi El-Omar
- Institute of Cardiovascular Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Manchester Heart Centre, Manchester Royal Infirmary, Central Manchester University Hospitals NHS Trust, Manchester, UK
| | - David Simon
- Department of Chemistry, Queen's University, Kingston, ON, Canada
| | - Sohaib Haseeb
- Division of Cardiology, Queen's University, Kingston, ON, Canada
| | - Farzin Fath-Ordoubadi
- Institute of Cardiovascular Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Manchester Heart Centre, Manchester Royal Infirmary, Central Manchester University Hospitals NHS Trust, Manchester, UK
| | - Bernard Clarke
- Institute of Cardiovascular Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- School of Chemistry and Manchester Centre for Integrative Systems Biology, Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
| | - Ludwig Neyses
- Institute of Cardiovascular Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- University of Luxembourg, 4365, Esch-sur-Alzette, Luxembourg
| | - Warwick B Dunn
- School of Chemistry and Manchester Centre for Integrative Systems Biology, Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
- School of Biosciences and Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
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Effect of n-3 long-chain polyunsaturated fatty acid intake on the eicosanoid profile in individuals with obesity and overweight: a systematic review and meta-analysis of clinical trials. J Nutr Sci 2021; 10:e53. [PMID: 34367628 PMCID: PMC8327393 DOI: 10.1017/jns.2021.46] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 06/25/2021] [Indexed: 12/20/2022] Open
Abstract
Dietary n-3 polyunsaturated fatty acids (PUFAs) present beneficial effects on counteracting inflammation status, displaying a critical anti-inflammatory role and maintaining physiological homeostasis in obesity. The primary objective of this systematic review was to evaluate the effect of n-3 PUFAs intake on the eicosanoid profile of people with obesity and overweight. The search strategy on Embase, Scopus, PubMed, Web of Science, Cochrane Library, Google Scholar and ProQuest was undertaken until November 2019 and updated January 2021. The effect size of n-3 PUFAs on prostaglandins was estimated by Glass's, type 1 in a random-effect model for the meta-analysis. Seven clinical trials met the eligible criteria and a total of 610 subjects were included in this systematic review, and four of seven studies were included in meta-analysis. The intake of n-3 PUFAs promoted an overall reduction in serum pro-inflammatory eicosanoids. Additionally, n-3 PUFAs intake significantly decreased the arachidonic acid COX-derived PG eicosanoid group levels (Glass's Δ -0⋅35; CI -0⋅62, -0⋅07, I 2 31⋅48). Subgroup analyses showed a higher effect on periods up to 8 weeks (Glass's Δ -0⋅51; CI -0⋅76, -0⋅27) and doses higher than 0⋅5 g of n-3 PUFAs (Glass's Δ -0⋅46; CI -0⋅72, -0⋅27). Dietary n-3 PUFAs intake contributes to reduce pro-inflammatory eicosanoids of people with obesity and overweight. Subgroup's analysis showed that n-3 PUFAs can reduce the overall arachidonic acid COX-derived PG when adequate dose and period are matched.
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Metelcová T, Vaňková M, Zamrazilová H, Hovhannisyan M, Staňková B, Tvrzická E, Hill M, Hainer V, Včelák J, Kunešová M. FADS1 gene polymorphism(s) and fatty acid composition of serum lipids in adolescents. Lipids 2021; 56:499-508. [PMID: 34189740 DOI: 10.1002/lipd.12317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 06/14/2021] [Accepted: 06/14/2021] [Indexed: 11/09/2022]
Abstract
Polyunsaturated fatty acids (PUFA) influence many physiological functions. Associations have been found between single nucleotide polymorphisms (SNP) in the FADS1 (Fatty acid desaturase 1) gene and the relative abundance of PUFA in serum lipids. This study examines the relationship between two SNPs in the FADS1 gene (rs174546, rs174537) and the fatty acid (FA) composition of serum lipids in adolescents (13-18 years). We used DNA samples (670 children; 336 girls and 334 boys) from the Childhood Obesity Prevalence and Treatment (COPAT) project. Genomic DNA was extracted from peripheral blood leukocytes in whole blood samples. For genotype analysis, TaqMan SNP Genotyping assays (Applied Biosystems) were used. Fatty acid composition of serum lipids was assessed using gas chromatography. The T-statistic and regression were used for statistical evaluations. Minor allele T carriers in both SNPs had significant lower level of palmitic acid (16:0, phospholipids) and arachidonic acid (20:4[n-6], phospholipids) in both sexes. In girls, we found a significant positive association between minor allele T carriers and eicosadienoic acid (20:2[n-6], cholesteryl esters) in both SNPs. Being a minor allele T carrier was significantly positively associated with dihomo-γ-linolenic acid (20:3[n-6], phospholipids) in boys in both SNPs. SNPs (including rs174546, rs174537) in the FADS gene cluster should have impacted desaturase activity, which may contribute to different efficiency of PUFA synthesis.
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Affiliation(s)
- Tereza Metelcová
- Institute of Endocrinology, Prague, The Czech Republic.,1st Medical Faculty, Charles University, Prague, The Czech Republic
| | | | | | | | - Barbora Staňková
- 4th Department of Internal Medicine, 1st Medical Faculty, Charles University, Prague, The Czech Republic
| | - Eva Tvrzická
- 4th Department of Internal Medicine, 1st Medical Faculty, Charles University, Prague, The Czech Republic
| | - Martin Hill
- Institute of Endocrinology, Prague, The Czech Republic
| | | | - Josef Včelák
- Institute of Endocrinology, Prague, The Czech Republic
| | - Marie Kunešová
- Institute of Endocrinology, Prague, The Czech Republic.,4th Department of Internal Medicine, 1st Medical Faculty, Charles University, Prague, The Czech Republic
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Linoleic acid in adipose tissue and the risk of myocardial infarction: a case-cohort study. Eur J Nutr 2021; 60:3639-3646. [PMID: 33687534 DOI: 10.1007/s00394-021-02526-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 02/19/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE We investigated risk of myocardial infarction (MI) associated with the content of linoleic acid (LA) in adipose tissue, a biomarker of long-term dietary intake of LA and a marker of endogenous LA exposure. METHODS Between 1993 and 1997, 57,053 middle-aged subjects were included in the Danish Diet, Cancer and Health cohort. We performed a case-cohort study that included a random sample of the full cohort (n = 3167) and all incident MI cases appearing during 16 years of follow-up (n = 2819). Information on incident MI cases was obtained by linkage with Danish nationwide registries. Adipose tissue biopsies were taken from the buttocks of the participants, and their fatty acid composition was determined using gas chromatography. HRs (hazard ratios) with 95% confidence intervals (CIs) were used to describe the associations between content of LA in adipose tissue and the risk of MI. HRs were calculated using weighted Cox proportional hazards regression with robust variance. RESULTS After adjustment for established risk factors of MI, adipose tissue content of LA was not associated with the risk of MI in men and women combined (quintiles 5 versus 1, HR, 1.03 (95% CI, 0.85-1.25), P-trend = 0.970) or in men and women separately (quintiles 5 versus 1, HR, 1.05 (95% CI, 0.83-1.33), P-trend = 0.871 and quintiles 5 versus 1, HR, 0.99 (95% CI 0.72-1.37), P-trend = 0.928, respectively). Investigating the association between LA and MI with a shorter, 5- or 10-year duration of follow-up provided similar results. CONCLUSION Content of LA in adipose tissue was not associated with the risk of MI.
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Zhang T, Zhao JV, Schooling CM. The associations of plasma phospholipid arachidonic acid with cardiovascular diseases: A Mendelian randomization study. EBioMedicine 2021; 63:103189. [PMID: 33418501 PMCID: PMC7804604 DOI: 10.1016/j.ebiom.2020.103189] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/27/2020] [Accepted: 12/09/2020] [Indexed: 12/11/2022] Open
Abstract
Background Arachidonic acid (AA), a major long-chain n-6 polyunsaturated fatty acid in animal foods, has been linked to inflammation, coagulation, and testosterone, which might relate to atherosclerotic cardiovascular diseases (ASCVD). We assessed the associations of genetically predicted plasma phospholipid AA with ASCVD and other CVD overall and by sex using Mendelian randomization (MR). Methods We conducted two-sample MR, applying eight genetic variants, independent of a highly pleiotropic variant (rs174547), strongly (p < 5 × 10−8) predicting AA, primarily to summary statistics of genetic associations with ASCVD, including ischaemic heart disease (IHD), ischaemic stroke, and peripheral artery disease (PAD) from CARDIoGRAMplusC4D 1000 Genomes (60,801 IHD cases, 123,504 controls), MEGASTROKE (34,217 ischaemic stroke cases, 406,111 controls), and Pan-UK Biobank (n=~420,531), and secondarily to genetic associations with other CVD from Pan-UK Biobank, Atrial Fibrillation Consortium, HERMES consortium, and FinnGen. We also assessed sex differences. Findings Genetically predicted AA was associated with ASCVD (odds ratio (OR) per % of total fatty acids increase 1.03, 95% confidence interval (CI) 1.01 to 1.05) and its subtypes IHD (OR 1.03, 95% CI 1.004 to 1.05), ischaemic stroke (OR 1.03, 95% CI 1.004 to 1.06) and possibly PAD (OR 1.08, 95% CI 1.00 to 1.17), possibly more strongly in men than women. AA was also associated with venous thromboembolism (OR 1.12, 95% CI 1.05 to 1.19). A similar pattern was observed when using rs174547 to genetically predict AA. Interpretation Our study suggests positive associations of AA with ASCVD and venous thromboembolism, with possibly stronger associations in men than women. Funding No funding.
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Affiliation(s)
- Ting Zhang
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Jie V Zhao
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - C Mary Schooling
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; School of Public Health and Health Policy, City University of New York, New York, NY, USA.
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Chang X, Dorajoo R, Sun Y, Wang L, Ong CN, Liu J, Khor CC, Yuan JM, Koh WP, Friedlander Y, Heng CK. Effect of plasma polyunsaturated fatty acid levels on leukocyte telomere lengths in the Singaporean Chinese population. Nutr J 2020; 19:119. [PMID: 33126880 PMCID: PMC7602302 DOI: 10.1186/s12937-020-00626-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 09/15/2020] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Shorter telomere length (TL) has been associated with poor health behaviors, increased risks of chronic diseases and early mortality. Excessive shortening of telomere is a marker of accelerated aging and can be influenced by oxidative stress and nutritional deficiency. Plasma n6:n3 polyunsaturated fatty acid (PUFA) ratio may impact cell aging. Increased dietary intake of marine n-3 PUFA is associated with reduced telomere attrition. However, the effect of plasma PUFA on leukocyte telomere length (LTL) and its interaction with genetic variants are not well established. METHODS A nested coronary artery disease (CAD) case-control study comprising 711 cases and 638 controls was conducted within the Singapore Chinese Health Study (SCHS). Samples genotyped with the Illumina ZhongHua-8 array. Plasma n-3 and n-6 PUFA were quantified using mass spectrometry (MS). LTL was measured with quantitative PCR method. Linear regression was used to test the association between PUFA and LTL. The interaction between plasma PUFAs and genetic variants was assessed by introducing an additional term (PUFA×genetic variant) in the regression model. Analysis was carried out in cases and controls separately and subsequently meta-analyzed using the inverse-variance weighted method. We further assessed the association of PUFA and LTL with CAD risk by Cox Proportional-Hazards model and whether the effect of PUFA on CAD was mediated through LTL by using structural equation modeling. RESULTS Higher n6:n3 ratio was significantly associated with shorter LTL (p = 0.018) and increased CAD risk (p = 0.005). These associations were mainly driven by elevated plasma total n-3 PUFAs, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) (p < 0.05). There was a statistically significant interaction for an intergenic single nucleotide polymorphism (SNP) rs529143 with plasma total n-3 PUFA and DHA on LTL beyond the genome-wide threshold (p < 5 × 10- 8). Mediation analysis showed that PUFA and LTL affected CAD risk independently. CONCLUSIONS Higher plasma n6:n3 PUFA ratio, and lower EPA and DHA n-3 PUFAs were associated with shorter LTL and increased CAD risk in this Chinese population. Furthermore, genetic variants may modify the effect of PUFAs on LTL. PUFA and LTL had independent effect on CAD risk in our study population.
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Affiliation(s)
- Xuling Chang
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 12, 1E Kent Ridge Road, Singapore, 119228, Singapore
- Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore
| | - Rajkumar Dorajoo
- Genome Institute of Singapore, Agency for Science, Technology and Research, Singapore, Singapore
| | - Ye Sun
- Nestlé Research Singapore Hub, Singapore, 21 Biopolis Drive, Nucleos, Singapore, Singapore
| | - Ling Wang
- Genome Institute of Singapore, Agency for Science, Technology and Research, Singapore, Singapore
| | - Choon Nam Ong
- Saw Swee Hock School of Public Health, National University of Singapore, National University Health System, Singapore, Singapore
- NUS Environmental Research Institute, National University of Singapore, Singapore, Singapore
| | - Jianjun Liu
- Genome Institute of Singapore, Agency for Science, Technology and Research, Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Chiea Chuen Khor
- Genome Institute of Singapore, Agency for Science, Technology and Research, Singapore, Singapore
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore
| | - Jian-Min Yuan
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Woon Puay Koh
- Saw Swee Hock School of Public Health, National University of Singapore, National University Health System, Singapore, Singapore
- Health Systems and Services Research, Duke-NUS Medical School Singapore, Singapore, Singapore
| | - Yechiel Friedlander
- School of Public Health and Community Medicine, Hebrew University of Jerusalem, Jerusalem, Israel.
- Unit of Epidemiology, Hebrew University-Hadassah Braun School of Public Health, POB 12272, 91120, Jerusalem, Israel.
| | - Chew-Kiat Heng
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 12, 1E Kent Ridge Road, Singapore, 119228, Singapore.
- Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore.
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10
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Straub RH. The memory of the fatty acid system. Prog Lipid Res 2020; 79:101049. [PMID: 32589906 DOI: 10.1016/j.plipres.2020.101049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/03/2020] [Accepted: 06/19/2020] [Indexed: 12/15/2022]
Abstract
Mental memory system has sensory memory, short-term memory, working memory, and long-term memory. Working memory "keeps things in mind in parallel" when performing complex tasks. Similar aspects can be found for immunological memory. However, there exists another one, the memory of the fatty acid system. This article shows sensory memory of the fatty acid system, which is the perception apparatus of small intestine enterocytes (CD36, SR-B1, FATP4, FABP1, FABP2) and hepatocytes. In these cells, the fatty acid short-term memory is located, consisting of a cytoplasmic lipid droplet cycle. Similar like a working memory in the brain, the short-term memory of enterocytes and hepatocytes use parallel processing and recourse to long-term fatty acid memory. The fatty acid long-term memory is far away from these primary points of uptake. It is located in the adipocyte and in cellular membranes. The process of building a fatty acid memory is described with constructs like sensing environmental material, encoding, consolidation, long-term storage, retrieval, re-encoding, re-consolidation, and renewed long-term storage. The article illustrates the dynamics of building a fatty acid memory, the information content of fatty acids including the code, the roles of fatty acids in the body, and a new understanding of the expression "you are what you eat". The memory of the fatty acid system, plays a decisive role in integrating environmental signals over time (diet and microbiome).
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Affiliation(s)
- Rainer H Straub
- Laboratory of Experimental Rheumatology and Neuroendocrine Immunology, Department of Internal Medicine, University Hospital, Regensburg, Germany.
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Fontaine D, Figiel S, Félix R, Kouba S, Fromont G, Mahéo K, Potier-Cartereau M, Chantôme A, Vandier C. Roles of endogenous ether lipids and associated PUFAs in the regulation of ion channels and their relevance for disease. J Lipid Res 2020; 61:840-858. [PMID: 32265321 PMCID: PMC7269763 DOI: 10.1194/jlr.ra120000634] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/29/2020] [Indexed: 12/16/2022] Open
Abstract
Ether lipids (ELs) are lipids characterized by the presence of either an ether linkage (alkyl lipids) or a vinyl ether linkage [i.e., plasmalogens (Pls)] at the sn1 position of the glycerol backbone, and they are enriched in PUFAs at the sn2 position. In this review, we highlight that ELs have various biological functions, act as a reservoir for second messengers (such as PUFAs) and have roles in many diseases. Some of the biological effects of ELs may be associated with their ability to regulate ion channels that control excitation-contraction/secretion/mobility coupling and therefore cell physiology. These channels are embedded in lipid membranes, and lipids can regulate their activities directly or indirectly as second messengers or by incorporating into membranes. Interestingly, ELs and EL-derived PUFAs have been reported to play a key role in several pathologies, including neurological disorders, cardiovascular diseases, and cancers. Investigations leading to a better understanding of their mechanisms of action in pathologies have opened a new field in cancer research. In summary, newly identified lipid regulators of ion channels, such as ELs and PUFAs, may represent valuable targets to improve disease diagnosis and advance the development of new therapeutic strategies for managing a range of diseases and conditions.
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Affiliation(s)
- Delphine Fontaine
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France
| | - Sandy Figiel
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France
| | - Romain Félix
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France
| | - Sana Kouba
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France
| | - Gaëlle Fromont
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France; Department of Pathology, CHRU Bretonneau, F-37044 Tours CEDEX 9, France
| | - Karine Mahéo
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France; Faculté de Pharmacie, Université de Tours, F-37200 Tours, France
| | | | - Aurélie Chantôme
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France; Faculté de Pharmacie, Université de Tours, F-37200 Tours, France
| | - Christophe Vandier
- Inserm N2C UMR1069, Université de Tours, F-37032 Tours CEDEX 1, France. mailto:
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Nelson JR, Raskin S. The eicosapentaenoic acid:arachidonic acid ratio and its clinical utility in cardiovascular disease. Postgrad Med 2019; 131:268-277. [PMID: 31063407 DOI: 10.1080/00325481.2019.1607414] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Eicosapentaenoic acid (EPA) is a key anti-inflammatory/anti-aggregatory long-chain polyunsaturated omega-3 fatty acid. Conversely, the omega-6 fatty acid, arachidonic acid (AA) is a precursor to a number of pro-inflammatory/pro-aggregatory mediators. EPA acts competitively with AA for the key cyclooxygenase and lipoxygenase enzymes to form less inflammatory products. As a result, the EPA:AA ratio may be a marker of chronic inflammation, with a lower ratio corresponding to higher levels of inflammation. It is now well established that inflammation plays an important role in cardiovascular disease. This review examines the role of the EPA:AA ratio as a marker of cardiovascular disease and the relationship between changes in the ratio (mediated by EPA intake) and changes in cardiovascular risk. Epidemiological studies have shown that a lower EPA:AA ratio is associated with an increased risk of coronary artery disease, acute coronary syndrome, myocardial infarction, stroke, chronic heart failure, peripheral artery disease, and vascular disease. Increasing the EPA:AA ratio through treatment with purified EPA has been shown in clinical studies to be effective in primary and secondary prevention of coronary artery disease and reduces the risk of cardiovascular events following percutaneous coronary intervention. The EPA:AA ratio is a valuable predictor of cardiovascular risk. Results from ongoing clinical trials will help to define thresholds for EPA treatment associated with better clinical outcomes.
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Affiliation(s)
- J R Nelson
- a California Cardiovascular Institute , Fresno , CA , USA
| | - S Raskin
- b Lipid Clinic , Sutter East Bay Medical Foundation , Oakland , CA , USA
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13
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Abstract
n-3 PUFA may exert favourable effects on several processes that may inhibit the atherosclerotic process. However, the role of n-3 PUFA in lowering the risk of atherosclerotic CVD (ASCVD) has been fiercely debated. In the present paper, we summarise the main findings from previous follow-up studies of intake and studies using adipose tissue as an objective biomarker to investigate exposure to n-3 PUFA in relation to ASCVD risk and discuss some perspectives for further research. The majority of previous studies investigating intake of marine- and plant-based n-3 PUFA have focused on CHD while other ASCVD such as ischaemic stroke and peripheral artery disease have been less studied. However, recent data from Danish Diet, Cancer and Health cohort suggest that marine n-3 PUFA may be inversely associated with risk of myocardial infarction, ischaemic stroke and peripheral arterial disease caused by atherosclerosis. The effect of the plant-derived n-3 PUFA α-linolenic acid on ASCVD is less clear and several gaps in the literature remain to be explored.
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14
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Burns JL, Nakamura MT, Ma DWL. Differentiating the biological effects of linoleic acid from arachidonic acid in health and disease. Prostaglandins Leukot Essent Fatty Acids 2018; 135:1-4. [PMID: 30103919 DOI: 10.1016/j.plefa.2018.05.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 05/24/2018] [Indexed: 10/14/2022]
Abstract
Dietary fatty acids are associated with the development of many chronic diseases, such as obesity, diabetes, cardiovascular disease, metabolic syndrome, and several cancers. This review explores the literature surrounding the combined and individual roles of n-6 PUFAs linoleic acid (LA) and arachidonic acid (AA) as they relate to immune and inflammatory response, cardiovascular health, liver health, and cancer. The evidence suggests that a pro-inflammatory view of LA and AA may be over simplified. Overall, this review highlights gaps in our understanding of the biological roles of LA, AA and their complex relationship with n-3 PUFA and the need for future studies that examine the roles of individual fatty acids, rather than groups.
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Affiliation(s)
- Jessie L Burns
- Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road East Guelph, Ontario N1G 2W1, Canada
| | - Manabu T Nakamura
- Department of Food Science and Human Nutrition, University of Illinois, Chicago, USA
| | - David W L Ma
- Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road East Guelph, Ontario N1G 2W1, Canada.
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15
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Chilton FH, Dutta R, Reynolds LM, Sergeant S, Mathias RA, Seeds MC. Precision Nutrition and Omega-3 Polyunsaturated Fatty Acids: A Case for Personalized Supplementation Approaches for the Prevention and Management of Human Diseases. Nutrients 2017; 9:E1165. [PMID: 29068398 PMCID: PMC5707637 DOI: 10.3390/nu9111165] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/07/2017] [Accepted: 10/19/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Dietary essential omega-6 (n-6) and omega-3 (n-3) 18 carbon (18C-) polyunsaturated fatty acids (PUFA), linoleic acid (LA) and α-linolenic acid (ALA), can be converted (utilizing desaturase and elongase enzymes encoded by FADS and ELOVL genes) to biologically-active long chain (LC; >20)-PUFAs by numerous cells and tissues. These n-6 and n-3 LC-PUFAs and their metabolites (ex, eicosanoids and endocannabinoids) play critical signaling and structural roles in almost all physiologic and pathophysiologic processes. METHODS This review summarizes: (1) the biosynthesis, metabolism and roles of LC-PUFAs; (2) the potential impact of rapidly altering the intake of dietary LA and ALA; (3) the genetics and evolution of LC-PUFA biosynthesis; (4) Gene-diet interactions that may lead to excess levels of n-6 LC-PUFAs and deficiencies of n-3 LC-PUFAs; and (5) opportunities for precision nutrition approaches to personalize n-3 LC-PUFA supplementation for individuals and populations. CONCLUSIONS The rapid nature of transitions in 18C-PUFA exposure together with the genetic variation in the LC-PUFA biosynthetic pathway found in different populations make mal-adaptations a likely outcome of our current nutritional environment. Understanding this genetic variation in the context of 18C-PUFA dietary exposure should enable the development of individualized n-3 LC-PUFA supplementation regimens to prevent and manage human disease.
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Affiliation(s)
- Floyd H Chilton
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Rahul Dutta
- Department of Urology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Lindsay M Reynolds
- Department of Epidemiology and Prevention, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Susan Sergeant
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Rasika A Mathias
- GeneSTAR Research Program, General Internal Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21224, USA.
| | - Michael C Seeds
- Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
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16
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Omega-6 fatty acids: Opposing associations with risk—The Ludwigshafen Risk and Cardiovascular Health Study. J Clin Lipidol 2017. [DOI: 10.1016/j.jacl.2017.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Bork CS, Jakobsen MU, Lundbye-Christensen S, Tjønneland A, Schmidt EB, Overvad K. Dietary intake and adipose tissue content of α-linolenic acid and risk of myocardial infarction: a Danish cohort study. Am J Clin Nutr 2016; 104:41-8. [PMID: 27169831 DOI: 10.3945/ajcn.115.127019] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/12/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Intake of the plant-derived ω-3 (n-3) fatty acid α-linolenic acid (ALA, 18:3; n-3) may reduce coronary heart disease (CHD) risk, but the results of previous studies have been inconsistent. OBJECTIVE We aimed to investigate the association between dietary intake of ALA, adipose tissue content of ALA, and risk of incident myocardial infarction (MI). DESIGN A total of 57,053 participants, aged 50-64 y, were enrolled in the prospective Danish cohort study Diet, Cancer and Health between 1993 and 1997. Dietary intake of ALA was assessed with the use of a validated semiquantitative food-frequency questionnaire in the full cohort, whereas the adipose tissue content of ALA was determined with the use of gas chromatography in all incident MI cases and in a random sex-stratified sample of the total cohort (n = 3500). RESULTS During a median of 17 y of follow-up, we identified 2177 male and 912 female cases of MI. After appropriate exclusions, we included 2124 men and 854 women for analyses of dietary intake of ALA, whereas 1994 men and 770 women were included in the analysis of the adipose tissue content of ALA. In multivariate analyses that were conducted with the use of restricted cubic splines and adjusted for established CHD risk factors, weak positive associations in men and weak U-shaped associations in women were shown between both dietary intake and the adipose tissue content of ALA and risk of MI, but these associations were not statistically significant. Additional adjustments for dietary factors did not influence the observed associations numerically. CONCLUSION This study suggests that ALA has no appreciable association with risk of incident MI in either men or women.
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Affiliation(s)
| | - Marianne U Jakobsen
- Department of Public Health, Section for Epidemiology, Aarhus University, Aarhus, Denmark; and
| | - Søren Lundbye-Christensen
- Unit of Clinical Biostatistics, and Aalborg AF Study Group, Aalborg University Hospital, Aalborg, Denmark
| | | | | | - Kim Overvad
- Department of Cardiology, Department of Public Health, Section for Epidemiology, Aarhus University, Aarhus, Denmark; and
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18
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Sun Y, Koh HWL, Choi H, Koh WP, Yuan JM, Newman JW, Su J, Fang J, Ong CN, van Dam RM. Plasma fatty acids, oxylipins, and risk of myocardial infarction: the Singapore Chinese Health Study. J Lipid Res 2016; 57:1300-7. [PMID: 27371261 DOI: 10.1194/jlr.p066423] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Indexed: 11/20/2022] Open
Abstract
We aimed to examine the prospective association between plasma FAs, oxylipins, and risk of acute myocardial infarction (AMI) in a Singapore Chinese population. A nested case-control study with 744 incident AMI cases and 744 matched controls aged 47-83 years was conducted within the Singapore Chinese Health Study. Nineteen plasma FAs and 12 oxylipins were quantified using MS. These were grouped into 12 FA clusters and 5 oxylipin clusters using hierarchical clustering, and their associations with AMI risk were assessed. Long-chain n-3 FAs [odds ratio (OR) = 0.67 per SD increase, 95% confidence interval (CI): 0.53-0.84, P < 0.001] and stearic acid (OR = 0.65, 95% CI: 0.44-0.97, P = 0.03) were inversely associated with AMI risk, whereas arachidonic acid (AA) was positively associated with AMI risk (OR = 1.25, 95% CI: 1.03-1.52, P = 0.02) in the multivariable model with adjustment for other FAs. Further adjustment for oxylipins did not substantially change these associations. An inverse association was observed between AA-derived oxylipin, thromboxane (TX)B2, and AMI risk (OR = 0.81, 95% CI: 0.71-0.93, P = 0.003). Circulating long-chain n-3 FAs and stearic acid were associated with a lower and AA was associated with a higher AMI risk in this Chinese population. The association between the oxylipin TXB2 and AMI requires further research.
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Affiliation(s)
- Ye Sun
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore Departments of Psychological Medicine National University of Singapore and National University Health System, Singapore
| | - Hiromi W L Koh
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore
| | - Hyungwon Choi
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore
| | - Woon-Puay Koh
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore Duke-NUS Graduate Medical School Singapore, Singapore
| | - Jian-Min Yuan
- Division of Cancer Control and Population Sciences, University of Pittsburgh Cancer Institute and Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh PA
| | - John W Newman
- Department of Nutrition, University of California Davis and US Department of Agriculture, Agricultural Research Sservice, Western Human Nutrition Research Center, Davis CA
| | - Jin Su
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore
| | - Jinling Fang
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore
| | - Choon Nam Ong
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore National University of Singapore Environmental Research Institute, National University of Singapore, Singapore
| | - Rob M van Dam
- Saw Swee Hock School of Public Health National University of Singapore and National University Health System, Singapore Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA
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19
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Farías JG, Carrasco-Pozo C, Carrasco Loza R, Sepúlveda N, Álvarez P, Quezada M, Quiñones J, Molina V, Castillo RL. Polyunsaturated fatty acid induces cardioprotection against ischemia-reperfusion through the inhibition of NF-kappaB and induction of Nrf2. Exp Biol Med (Maywood) 2016; 242:1104-1114. [PMID: 27190274 DOI: 10.1177/1535370216649263] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The mechanistic evidence to support the cardioprotective effects of polyunsaturated fatty acids (PUFA) are controversial. The aim was to test cardioprotective mechanisms induced by PUFA supplementation against cardiac ischemia-reperfusion (IR) injury. Ten-week-old male Wistar rats (225 ± 14 g, n = 14) were divided in two groups: rats without supplementation ( n = 7) and a PUFA group, supplemented by PUFA (0.6 g/kg/day; DHA:EPA = 3:1) for eight weeks ( n = 7). Hearts were perfused with Krebs-Henseleit buffer for 20 min (control conditions); others were subjected to control conditions, 30 min of global ischemia and 120 min of reperfusion (IR group). Infarct size (IS) and left ventricular developed pressure (LVDP) were measured at 120 min of reperfusion. Oxidative stress biomarkers (TBARS, total carbonyls), antioxidant status (CAT, catalase; SOD, superoxide dismutase; GSH-Px, glutathione peroxidase activity and GSH/GSSG ratio), myeloperoxidase activity, ATP levels and nuclear transcription factor erythroid 2-related factor 2 (Nrf2) and nuclear factor kappaB (NF-κB) were determined in both experimental conditions. At the end of reperfusion, hearts supplemented with PUFA showed lower IS and a higher LVDP compared with the nonsupplemented rats. Hearts in the group supplemented with PUFA showed lower levels of oxidative stress markers and higher antioxidant activity, decreased MPO activity and NF-κB and Nrf2 activation compared with the nonsupplemented group. Cardioprotective effects of PUFA are exerted through induction of anti-inflammatory and antioxidant mechanism at tissue level.
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Affiliation(s)
- Jorge G Farías
- 1 Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco 4811230, Chile
| | - Catalina Carrasco-Pozo
- 2 Departamento de Nutrición, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile
| | - Rodrigo Carrasco Loza
- 3 Laboratorio de Investigación Biomédica, Facultad de Medicina Oriente, Hospital del Salvador, Universidad de Chile, Santiago 7500922, Chile
| | - Néstor Sepúlveda
- 4 Laboratorio de Producción Animal, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4811230, Chile
| | - Pedro Álvarez
- 5 Servicio Anestesiología, Hospital San Juan de Dios, Santiago 8380453, Chile
| | - Mauricio Quezada
- 6 Facultad de Medicina, Universidad Finis Terrae, Santiago 7501015, Chile.,7 Programa de Fisiopatología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile
| | - John Quiñones
- 4 Laboratorio de Producción Animal, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco 4811230, Chile
| | - Víctor Molina
- 8 Hospital de Niños, Roberto del Río, Santiago 8380418, Chile
| | - Rodrigo L Castillo
- 7 Programa de Fisiopatología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile
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Farvid MS, Ding M, Pan A, Sun Q, Chiuve SE, Steffen LM, Willett WC, Hu FB. Dietary linoleic acid and risk of coronary heart disease: a systematic review and meta-analysis of prospective cohort studies. Circulation 2014; 130:1568-78. [PMID: 25161045 PMCID: PMC4334131 DOI: 10.1161/circulationaha.114.010236] [Citation(s) in RCA: 330] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 07/29/2014] [Indexed: 11/16/2022]
Abstract
BACKGROUND Previous studies on intake of linoleic acid (LA), the predominant n-6 fatty acid, and coronary heart disease (CHD) risk have generated inconsistent results. We performed a systematic review and meta-analysis of prospective cohort studies to summarize the evidence regarding the relation of dietary LA intake and CHD risk. METHODS AND RESULTS We searched MEDLINE and EMBASE databases through June 2013 for prospective cohort studies that reported the association between dietary LA and CHD events. In addition, we used unpublished data from cohort studies in a previous pooling project. We pooled the multivariate-adjusted relative risk (RR) to compare the highest with the lowest categories of LA intake using fixed-effect meta-analysis. We identified 13 published and unpublished cohort studies with a total of 310 602 individuals and 12 479 total CHD events, including 5882 CHD deaths. When the highest category was compared with the lowest category, dietary LA was associated with a 15% lower risk of CHD events (pooled RR, 0.85; 95% confidence intervals, 0.78-0.92; I(2)=35.5%) and a 21% lower risk of CHD deaths (pooled RR, 0.79; 95% confidence intervals, 0.71-0.89; I(2)=0.0%). A 5% of energy increment in LA intake replacing energy from saturated fat intake was associated with a 9% lower risk of CHD events (RR, 0.91; 95% confidence intervals, 0.87-0.96) and a 13% lower risk of CHD deaths (RR, 0.87; 95% confidence intervals, 0.82-0.94). CONCLUSIONS In prospective observational studies, dietary LA intake is inversely associated with CHD risk in a dose-response manner. These data provide support for current recommendations to replace saturated fat with polyunsaturated fat for primary prevention of CHD.
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Affiliation(s)
- Maryam S Farvid
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - Ming Ding
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - An Pan
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - Qi Sun
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - Stephanie E Chiuve
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - Lyn M Steffen
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - Walter C Willett
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN
| | - Frank B Hu
- From the Departments of Nutrition (M.S.F., M.D., Q.S., S.E.C., W.C.W., F.B.H.) and Epidemiology (W.C.W., F.B.H.), Harvard School of Public Health, Boston, MA; Department of Community Nutrition (M.S.F.), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Saw Swee Hock School of Public Health and Yong Loo Lin School of Medicine (A.P.), National University of Singapore and National University Health System, Republic of Singapore; Channing Division of Network Medicine, Department of Medicine (Q.S., W.C.W., F.B.H.) and Division of Preventive Medicine, Department of Medicine (S.E.C.), Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and Division of Epidemiology and Community Health (L.M.S.), University of Minnesota School of Public Health, Minnesota, MN.
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Monteiro J, Leslie M, Moghadasian MH, Arendt BM, Allard JP, Ma DWL. The role of n - 6 and n - 3 polyunsaturated fatty acids in the manifestation of the metabolic syndrome in cardiovascular disease and non-alcoholic fatty liver disease. Food Funct 2014; 5:426-35. [PMID: 24496399 DOI: 10.1039/c3fo60551e] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cardiovascular disease (CVD) and non-alcoholic fatty liver disease (NAFLD) are manifestations of the metabolic syndrome. CVD remains the number one cause of mortality in the West, while NAFLD is the most common liver disease. Growing evidence suggests that polyunsaturated fatty acids (PUFA) influence risk factors including circulating lipids and inflammation on the development of CVD and NAFLD. N - 6 and n - 3 PUFA are comprised of distinct family members, which are increasingly recognized for their individual effects. Therefore, this review examines what is currently known about the specific effects of the major n - 3 and n - 6 PUFA on CVD and NAFLD. Overall, this review supports a beneficial effect of n - 3 PUFA and highlights distinctive effects between alpha-linolenic acid found in plant oils relative to marine derived eicosapentaenoic acid and docosahexaenoic acid. This review also highlights contrasting health effects between the n - 6 PUFA, linoleic and arachidonic acid.
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Affiliation(s)
- Jessica Monteiro
- Department of Human Health and Nutritional Sciences, College of Biological Science, 491 Gordon Street, University of Guelph, Animal Science/Nutrition Building, Room 342, Guelph, Ontario N1G 2W1, Canada.
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22
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Hellstrand S, Ericson U, Gullberg B, Hedblad B, Orho-Melander M, Sonestedt E. Genetic variation in FADS1 has little effect on the association between dietary PUFA intake and cardiovascular disease. J Nutr 2014; 144:1356-63. [PMID: 25008580 PMCID: PMC4130826 DOI: 10.3945/jn.114.192708] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The unclear link between intake of polyunsaturated fatty acids (PUFAs) and risk of cardiovascular disease (CVD) could depend on genetic differences between individuals. Minor alleles of single-nucleotide polymorphisms (SNPs) in the ∆5 fatty acid desaturase (FADS) 1 gene were associated with lower blood concentrations of long-chain ω-3 (n-3) and ω-6 (n-6) PUFAs, indicating an associated loss of function effect. We examined whether the SNP rs174546 in FADS1 modifies the association between PUFA intakes and CVD risk. We included 24,032 participants (62% women, aged 44-74 y) from the Malmö Diet and Cancer cohort without prevalent CVD and diabetes. During a mean follow-up of 14 y, 2648 CVD cases were identified. Diet was assessed by a modified diet history method. A borderline interaction was observed between the α-linolenic acid (ALA) (18:3n-3)-to-linoleic acid (LA) (18:2n-6) intake ratio and FADS1 genotype on CVD incidence (P = 0.06). The ALA-to-LA intake ratio was inversely associated with CVD risk only among participants homozygous for the minor T-allele (HR for quintile 5 vs. quintile 1 = 0.72; 95% CI: 0.50, 1.04; P-trend = 0.049). When excluding participants reporting unstable food habits in the past (35%), the interaction between the ALA-to-LA intake ratio and FADS1 genotype on CVD incidence was strengthened and statistically significant (P = 0.04). Additionally, we observed a significant interaction between ALA and FADS1 genotype on ischemic stroke incidence (P = 0.03). ALA was inversely associated with ischemic stroke only among TT genotype carriers (HR for quintile 5 vs. quintile 1 = 0.50; 95% CI: 0.27, 0.94; P-trend = 0.02). In this large cohort, we found some weak, but not convincing, evidence of effect modification by genetic variation in FADS1 on the associations between PUFA intakes and CVD risk. For the 11% of the population homozygous for the minor T-allele of rs174546 that associates with lower ∆5 FADS activity, high ALA intake and ALA-to-LA intake ratio may be preferable in the prevention of CVD and ischemic stroke.
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Affiliation(s)
| | - Ulrika Ericson
- Diabetes and Cardiovascular Disease–Genetic Epidemiology
| | | | - Bo Hedblad
- Cardiovascular Epidemiology, Department of Clinical Sciences in Malmö, Lund University, Lund, Sweden
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23
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Guan W, Steffen BT, Lemaitre RN, Wu JH, Tanaka T, Manichaikul A, Foy M, Rich SS, Wang L, Nettleton JA, Tang W, Gu X, Bandinelli S, King IB, McKnight B, Psaty BM, Siscovick D, Djousse L, Chen YDI, Ferrucci L, Fornage M, Mozafarrian D, Tsai MY, Steffen LM. Genome-wide association study of plasma N6 polyunsaturated fatty acids within the cohorts for heart and aging research in genomic epidemiology consortium. CIRCULATION. CARDIOVASCULAR GENETICS 2014; 7:321-331. [PMID: 24823311 PMCID: PMC4123862 DOI: 10.1161/circgenetics.113.000208] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Omega6 (n6) polyunsaturated fatty acids (PUFAs) and their metabolites are involved in cell signaling, inflammation, clot formation, and other crucial biological processes. Genetic components, such as variants of fatty acid desaturase (FADS) genes, determine the composition of n6 PUFAs. METHODS AND RESULTS To elucidate undiscovered biological pathways that may influence n6 PUFA composition, we conducted genome-wide association studies and meta-analyses of associations of common genetic variants with 6 plasma n6 PUFAs in 8631 white adults (55% women) across 5 prospective studies. Plasma phospholipid or total plasma fatty acids were analyzed by similar gas chromatography techniques. The n6 fatty acids linoleic acid (LA), γ-linolenic acid (GLA), dihomo-GLA, arachidonic acid, and adrenic acid were expressed as percentage of total fatty acids. We performed linear regression with robust SEs to test for single-nucleotide polymorphism-fatty acid associations, with pooling using inverse-variance-weighted meta-analysis. Novel regions were identified on chromosome 10 associated with LA (rs10740118; P=8.1×10(-9); near NRBF2), on chromosome 16 with LA, GLA, dihomo-GLA, and arachidonic acid (rs16966952; P=1.2×10(-15), 5.0×10(-11), 7.6×10(-65), and 2.4×10(-10), respectively; NTAN1), and on chromosome 6 with adrenic acid after adjustment for arachidonic acid (rs3134950; P=2.1×10(-10); AGPAT1). We confirmed previous findings of the FADS cluster on chromosome 11 with LA and arachidonic acid, and further observed novel genome-wide significant association of this cluster with GLA, dihomo-GLA, and adrenic acid (P=2.3×10(-72), 2.6×10(-151), and 6.3×10(-140), respectively). CONCLUSIONS Our findings suggest that along with the FADS gene cluster, additional genes may influence n6 PUFA composition.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Aging/blood
- Aging/genetics
- Chromosomes, Human, Pair 10/genetics
- Chromosomes, Human, Pair 16/genetics
- Chromosomes, Human, Pair 6/genetics
- Fatty Acid Desaturases/genetics
- Fatty Acids, Omega-6/blood
- Female
- Genome-Wide Association Study
- Genomics
- Heart Diseases/blood
- Heart Diseases/epidemiology
- Heart Diseases/genetics
- Humans
- Male
- Middle Aged
- Polymorphism, Single Nucleotide
- Prospective Studies
- Sequence Analysis, DNA
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Affiliation(s)
- Weihua Guan
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN
| | - Brian T. Steffen
- Laboratory Medicine & Pathology, University of Minnesota, Minneapolis, MN
| | - Rozenn N. Lemaitre
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA
| | - Jason H.Y. Wu
- Department of Epidemiology and Nutrition, Harvard School of Public Health, Boston, MA
- School of Medicine and Pharmacology, University of Western Australia, Perth, Australia
| | - Toshiko Tanaka
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD
| | - Ani Manichaikul
- Center for Public Health Genomics, Division of Biostatistics and Epidemiology, University of Virginia, Charlottesville, VA
| | - Millennia Foy
- Institute of Molecular Medicine, University of Texas Health Sciences Center in Houston, Houston, TX
| | - Stephen S. Rich
- Center for Public Health Genomics, Division of Biostatistics and Epidemiology, University of Virginia, Charlottesville, VA
| | - Lu Wang
- Department of Epidemiology and Nutrition, Harvard School of Public Health, Boston, MA
| | - Jennifer A. Nettleton
- Department of Epidemiology, University of Texas Health Sciences Center in Houston, Houston, TX
| | - Weihong Tang
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
| | - Xiangjun Gu
- Institute of Molecular Medicine, University of Texas Health Sciences Center in Houston, Houston, TX
| | - Stafania Bandinelli
- Geriatric Rehabilitation Unit, Azienda Sanitaria Firenze (ASF), Florence, Italy
| | - Irena B. King
- Department of Internal Medicine, University of New Mexico, Albuquerque, New Mexico
| | - Barbara McKnight
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA
| | - Bruce M. Psaty
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology and Health Services, University of Washington, Seattle, WA
- Group Health Research Institute, Group Health Cooperative, Seattle, WA
| | - David Siscovick
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology and Health Services, University of Washington, Seattle, WA
| | - Luc Djousse
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School & Boston VA Healthcare System, Boston, MA
| | | | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD
| | - Myriam Fornage
- Institute of Molecular Medicine, University of Texas Health Sciences Center in Houston, Houston, TX
- Department of Epidemiology, University of Texas Health Sciences Center in Houston, Houston, TX
| | - Dariush Mozafarrian
- Division of Cardiovascular Medicine, Brigham and Women's Hospital and Harvard Medical School; Department of Epidemiology, Harvard School of Public Health, Boston, MA
| | - Michael Y. Tsai
- Laboratory Medicine & Pathology, University of Minnesota, Minneapolis, MN
| | - Lyn M. Steffen
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
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Tosi F, Sartori F, Guarini P, Olivieri O, Martinelli N. Delta-5 and Delta-6 Desaturases: Crucial Enzymes in Polyunsaturated Fatty Acid-Related Pathways with Pleiotropic Influences in Health and Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 824:61-81. [DOI: 10.1007/978-3-319-07320-0_7] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Nielsen MS, Grønholdt MLM, Vyberg M, Overvad K, Andreasen A, Due KM, Schmidt EB. Adipose tissue arachidonic acid content is associated with the expression of 5-lipoxygenase in atherosclerotic plaques. Lipids Health Dis 2013; 12:7. [PMID: 23351835 PMCID: PMC3561201 DOI: 10.1186/1476-511x-12-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Accepted: 01/22/2013] [Indexed: 11/13/2022] Open
Abstract
Background The content of arachidonic acid in adipose tissue is positively associated with the risk of myocardial infarction, whereas the content of eicosapentaenoic acid in adipose tissue has been reported to be negatively associated with the risk of myocardial infarction. Both arachidonic acid and eicosapentaenoic acid are substrates for the synthesis of pro-inflammatory leukotrienes and leukotrienes derived from eicosapentaenoic acid are generally much less potent. In this study we hypothesized that a high content of arachidonic acid in adipose tissue would reflect a high formation of arachidonic acid derived leukotrienes and a high expression of 5-lipoxygenase in atherosclerotic plaques. Likewise, we hypothesized that a high content of eicosapentaenoic acid in adipose tissue would reflect a low formation of arachidonic acid derived leukotrienes and a low expression of 5-lipoxygenase in plaques. Methods In a cross sectional study we included 45 consecutive subjects undergoing femoral thrombendarterectomy. The expression of 5-lipoxygenase in plaques was assessed by a semi-automated image analysis computer programme after immunohistochemical staining with mono-clonal 5-lipoxygenase antibodies. Leukotriene B4 and cysteinyl leukotriene formation from stimulated femoral artery plaques was quantified using ELISA methods. The fatty acid content of adipose tissue biopsies from the thigh was analyzed using gas chromatography. Associations between variables were assessed by Pearson correlations and were further explored in a multivariable linear regression model adjusting for potential confounders. Results A high content of arachidonic acid in adipose tissue was associated with a higher expression of 5-lipoxygenase in plaques (r = 0.32, p = 0.03), but no significant associations with leukotriene B4 (r = 0.22, p = 0.14) and cysteinyl leukotriene (r = −0.11, p = 0.46) formation was seen. No significant associations were found between the content of eicosapentaenoic acid in adipose tissue and 5-lipoxygenase expression or leukotriene formation in plaque. Conclusions Adipose tissue arachidonic acid contents correlated positively with the expression of 5-lipoxygenase in plaques. This association might represent a causal link between adipose tissue arachidonic acid and the risk of myocardial infarction but confirmatory studies are needed.
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Affiliation(s)
- Michael S Nielsen
- Department of Cardiology, Center for Cardiovascular Research, Aalborg University Hospital, Soendre Skovvej 15, 9000, Aalborg, Denmark.
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Nielsen MS, Schmidt EB, Stegger J, Gorst-Rasmussen A, Tjonneland A, Overvad K. Adipose tissue arachidonic acid content is associated with the risk of myocardial infarction: a Danish case-cohort study. Atherosclerosis 2013; 227:386-90. [PMID: 23390891 DOI: 10.1016/j.atherosclerosis.2012.12.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 12/20/2012] [Accepted: 12/24/2012] [Indexed: 01/07/2023]
Abstract
OBJECTIVE The primary aim of the study was to evaluate the association between adipose tissue arachidonic acid (AA) content and the risk of myocardial infarction (MI). The secondary aim was to assess the correlation between adipose tissue AA and dietary intake of AA and linoleic acid (LA). METHODS We conducted a case-cohort study nested within the Danish prospective Diet, Cancer and Health (DCH) study. After appropriate exclusions, the study included 2134 incident MI cases. Gluteal adipose tissue biopsies were collected at recruitment, and the fatty acid composition was determined by gas chromatography. A weighted Cox proportional hazards model was used to evaluate the association between adipose tissue AA content and the risk of MI. RESULTS After adjusting for confounders we found a positive association between adipose tissue AA content and the risk of MI. Hazard ratios (HR) of MI relative to the lowest quintile of adipose tissue AA content, increased across quintiles; second quintile (HR 1.19 95%CI: 0.97-1.45), third (HR 1.24 95%CI: 1.02-1.52), fourth (HR 1.28 95%CI: 1.03-1.60), and fifth quintile (HR 1.39 95%CI: 1.10-1.77). Adipose tissue AA levels were not correlated with dietary intake of AA (r=0.03, 95%CI: -0.01, 0.06) and weakly negatively correlated with dietary intake of LA (r=-0.12, 95%CI: -0.15, -0.08). CONCLUSIONS The adipose tissue content of AA was positively associated with the risk of MI but did not correlate with dietary intake of neither AA nor LA.
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Affiliation(s)
- Michael Skjelbo Nielsen
- Department of Cardiology, Center for Cardiovascular Research, Aalborg Hospital, Aarhus University Hospital, Soendre Skovvej 15, 9000 Aalborg, Denmark.
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Petrone AB, Weir N, Hanson NQ, Glynn R, Tsai MY, Gaziano JM, Djoussé L. Omega-6 fatty acids and risk of heart failure in the Physicians' Health Study. Am J Clin Nutr 2013; 97:66-71. [PMID: 23193008 PMCID: PMC3522140 DOI: 10.3945/ajcn.112.048991] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Although 1 in 5 adults will develop heart failure (HF) in their lifetime, data on the effect of plasma omega-6 (n-3) PUFAs on risk of HF are currently sparse. OBJECTIVES We investigated whether plasma phospholipid omega-6 concentrations are associated with risk of HF in US male physicians. In a secondary analysis, we evaluated whether such an association differs between HF with and without previous myocardial infarction (MI). DESIGN With the use of a nested case-control design, this ancillary study comprised 788 cases and 788 matched controls from the Physicians' Health Study. Plasma omega-6 PUFAs were measured by using gas chromatography. RESULTS The mean age of subjects was 58.7 y with a mean follow-up time of 17.1 y. We did not show any evidence of a statistically significant relation between total omega-6 PUFAs and HF [OR (95% CI): 1.00; 0.85 (0.63, 1.14); 0.84 (0.63, 1.13); and 0.87 (0.63, 1.20) across consecutive quartiles of omega-6 PUFAs; P-linear trend = 0.39]. Results were similar for HF with and without previous MI. CONCLUSION Our data showed no significant association between total plasma omega-6 PUFAs and risk of developing HF.
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28
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SONE Y, KIDO T, AINUKI T, SONODA M, ICHI I, KODAMA S, SONE H, KONDO K, MORITA Y, EGAWA S, KAWAHARA K, OTSUKA Y, FUJIWARA Y. Genetic Variants of the Fatty Acid Desaturase Gene Cluster Are Associated with Plasma LDL Cholesterol Levels in Japanese Males. J Nutr Sci Vitaminol (Tokyo) 2013; 59:325-35. [DOI: 10.3177/jnsv.59.325] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Pan A, Chen M, Chowdhury R, Wu JHY, Sun Q, Campos H, Mozaffarian D, Hu FB. α-Linolenic acid and risk of cardiovascular disease: a systematic review and meta-analysis. Am J Clin Nutr 2012; 96:1262-73. [PMID: 23076616 PMCID: PMC3497923 DOI: 10.3945/ajcn.112.044040] [Citation(s) in RCA: 215] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Prior studies of α-linolenic acid (ALA), a plant-derived omega-3 (n-3) fatty acid, and cardiovascular disease (CVD) risk have generated inconsistent results. OBJECTIVE We conducted a meta-analysis to summarize the evidence regarding the relation of ALA and CVD risk. DESIGN We searched multiple electronic databases through January 2012 for studies that reported the association between ALA (assessed as dietary intake or as a biomarker in blood or adipose tissue) and CVD risk in prospective and retrospective studies. We pooled the multivariate-adjusted RRs comparing the top with the bottom tertile of ALA using random-effects meta-analysis, which allowed for between-study heterogeneity. RESULTS Twenty-seven original studies were identified, including 251,049 individuals and 15,327 CVD events. The overall pooled RR was 0.86 (95% CI: 0.77, 0.97; I² = 71.3%). The association was significant in 13 comparisons that used dietary ALA as the exposure (pooled RR: 0.90; 95% CI: 0.81, 0.99; I² = 49.0%), with similar but nonsignificant trends in 17 comparisons in which ALA biomarkers were used as the exposure (pooled RR: 0.80; 95% CI: 0.63, 1.03; I² = 79.8%). An evaluation of mean participant age, study design (prospective compared with retrospective), exposure assessment (self-reported diet compared with biomarker), and outcome [fatal coronary heart disease (CHD), nonfatal CHD, total CHD, or stroke] showed that none were statistically significant sources of heterogeneity. CONCLUSIONS In observational studies, higher ALA exposure is associated with a moderately lower risk of CVD. The results were generally consistent for dietary and biomarker studies but were not statistically significant for biomarker studies. However, the high unexplained heterogeneity highlights the need for additional well-designed observational studies and large randomized clinical trials to evaluate the effects of ALA on CVD.
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Affiliation(s)
- An Pan
- Department of Nutrition, Harvard School of Public Health, Harvard Medical School, Boston, MA 02115, USA.
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30
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Chiuve SE, Rimm EB, Sandhu RK, Bernstein AM, Rexrode KM, Manson JE, Willett WC, Albert CM. Dietary fat quality and risk of sudden cardiac death in women. Am J Clin Nutr 2012; 96:498-507. [PMID: 22854398 PMCID: PMC3417213 DOI: 10.3945/ajcn.112.040287] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 06/21/2012] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Dietary n-3 PUFAs are inversely associated with risk of sudden cardiac death (SCD); however, little is known about other fats and SCD. Furthermore, concerns have been raised that high n-6 PUFA intake may attenuate the benefits of n-3 PUFAs. OBJECTIVE We examined associations and selected interactions between dietary fatty acids, expressed as a proportion of total fat and SCD. DESIGN We conducted a prospective cohort study among 91,981 women aged 34-59 y from the Nurses' Health Study in 1980. Over 30 y, we documented 385 SCDs. RESULTS In multivariable models, women in the highest compared with the lowest quintile of SFA intake had an RR of SCD of 1.44 (95% CI: 1.04, 1.98). Conversely, women in the highest compared with the lowest quintile of PUFA intake had an RR of SCD of 0.57 (95% CI: 0.41, 0.78). Intakes of n-6 and n-3 PUFAs were both significantly associated with a lower risk of SCD, and n-6 PUFAs did not modify the association between n-3 PUFAs and SCD. MUFAs and trans fats were not associated with SCD risk. After further adjustment for coronary heart disease (CHD) and CHD risk factors potentially in the causal pathway, the association between PUFAs and SCD remained significant, whereas the association for SFAs was no longer significant. CONCLUSIONS Intake of PUFAs as a proportion of fat was inversely associated with SCD risk, independent of traditional CHD risk factors. These results support dietary guidelines to improve dietary fat quality by replacing intake of SFAs with n-6 and n-3 PUFAs.
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MESH Headings
- Adult
- Cohort Studies
- Coronary Disease/epidemiology
- Coronary Disease/etiology
- Coronary Disease/prevention & control
- Death, Sudden, Cardiac/epidemiology
- Death, Sudden, Cardiac/etiology
- Death, Sudden, Cardiac/prevention & control
- Dietary Fats/adverse effects
- Dietary Fats/therapeutic use
- Fatty Acids, Omega-3/therapeutic use
- Fatty Acids, Omega-6/therapeutic use
- Female
- Follow-Up Studies
- Health Promotion
- Humans
- Incidence
- Middle Aged
- Models, Biological
- Models, Statistical
- Prospective Studies
- Risk Factors
- Surveys and Questionnaires
- United States/epidemiology
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Affiliation(s)
- Stephanie E Chiuve
- Center for Arrhythmia Prevention, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
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Dal Bosco A, Mugnai C, Mourvaki E, Castellini C. Seasonal changes in the fillet fatty acid profile and nutritional characteristics of wild Trasimeno Lake goldfish (Carassius auratus L.). Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.11.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Kark JD, Goldberger N, Kimura M, Sinnreich R, Aviv A. Energy intake and leukocyte telomere length in young adults. Am J Clin Nutr 2012; 95:479-87. [PMID: 22237065 PMCID: PMC3260074 DOI: 10.3945/ajcn.111.024521] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Dietary energy restriction in mammals, particularly at a young age, extends the life span. Leukocyte telomere length (LTL) is thought to be a bioindicator of aging in humans. High n-6 (omega-6) PUFA intake may accelerate LTL attrition. OBJECTIVE We determined whether lower energy and higher PUFA intakes in young adulthood are associated with shorter LTL in cross-sectional and longitudinal analyses. DESIGN In a longitudinal observational study (405 men, 204 women), diet was determined at baseline by a semiquantitative food-frequency questionnaire, and LTL was determined by Southern blots at mean ages of 30.1 y (baseline) and 43.2 y (follow-up). Spearman correlations and multivariable linear regression were used. RESULTS Baseline energy intake was inversely associated with follow-up LTL in men (standardized β = -0.171, P = 0.0005) but not in women (P = 0.039 for sex interaction). The difference in men between the highest and lowest quintiles of energy was 244 base pairs (bp) (95% CI: 59, 429 bp) and between extreme quintiles of LTL was 440 kcal (95% CI: 180, 700 kcal). Multivariable adjustment modestly attenuated the association (β = -0.157, P = 0.002). Inverse associations, which were noted for all macronutrients, were strongest for the unsaturated fatty acids. In multivariable models including energy and the macronutrients (as percentage of energy), the significant inverse energy-LTL association (but not the PUFA-LTL association) persisted. The energy-LTL association was restricted to never smokers (standardized β = -0.259, P = 0.0008; P = 0.050 for the smoking × calorie interaction). CONCLUSIONS The inverse calorie intake-LTL association is consistent with trial data showing beneficial effects of calorie restriction on aging biomarkers. Further exploration of energy intake and LTL dynamics in the young is needed.
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Affiliation(s)
- Jeremy D Kark
- Hebrew University-Hadassah School of Public Health and Community Medicine, Ein Kerem, Jerusalem, Israel.
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Steffen BT, Steffen LM, Tracy R, Siscovick D, Jacobs D, Liu K, He K, Hanson NQ, Nettleton JA, Tsai MY. Ethnicity, plasma phospholipid fatty acid composition and inflammatory/endothelial activation biomarkers in the Multi-Ethnic Study of Atherosclerosis (MESA). Eur J Clin Nutr 2012; 66:600-5. [PMID: 22215136 DOI: 10.1038/ejcn.2011.215] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND/OBJECTIVES It has been recognized that certain long-chain polyunsaturated fatty acids (LC-PUFAs) are involved in inflammation and its resolution. It has also been shown that ethnicity may be a factor in affecting systemic inflammation, and limited evidence suggests it may influence plasma LC-PUFA composition. Given the links among these three factors, we aim to determine ethnicity-based differences in plasma LC-PUFA composition among White, Black, Hispanic and Chinese participants, and whether such differences contribute to variations in markers of inflammation and endothelial activation in a sub-cohort of the Multi-Ethnic Study of Atherosclerosis (MESA). SUBJECTS/METHODS Plasma phospholipid LC-PUFAs levels (%) were determined in 2848 MESA participants using gas chromatography-flame ionization detection. Enzyme immunoassays determined inflammatory markers levels for high-sensitivity C-reactive protein (n=2848), interleukin-6 (n=2796), soluble tumor necrosis factor-α receptor type 1 (n=998), and endothelial activation markers soluble intercellular adhesion molecule-1 (n=1192) and soluble E-selectin (n=998). The modifying influence of ethnicity was tested by linear regression analysis. RESULTS Chinese adults were found to have the highest mean levels of plasma eicosapentaenoic acid (EPA, 1.24%) and docosahexaenoic acid (DHA, 4.95%), and the lowest mean levels of γ-linolenic (0.10%), dihomo-γ-linolenic (DGLA, 2.96%) and arachidonic (10.72%) acids compared with the other ethnicities (all P ≤ 0.01). In contrast, Hispanics had the lowest mean levels of plasma EPA (0.70%) and DHA (3.49%), and the highest levels of DGLA (3.59%; all P ≤ 0.01). Significant differences in EPA and DHA among ethnicities were attenuated following adjustment for dietary non-fried fish and fish oil supplementation. Ethnicity did not modify the associations of LC-PUFAs with markers of inflammation or endothelial activation (all P (interaction)>0.05). CONCLUSIONS The absence of a modifying effect of ethnicity indicates that the putative benefits of LC-PUFAs with respect to inflammation are pan-ethnic. Future longitudinal studies may elucidate the origin(s) of ethnicity-based differences in LC-PUFA composition and whether certain patterns, that is, high plasma levels of DGLA and low levels of EPA/DHA, contribute to inflammation-associated health outcomes.
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Affiliation(s)
- B T Steffen
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455-0392, USA
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No scientific support for linking dietary saturated fat to CHD. Br J Nutr 2011; 107:455-7; author reply 458-60. [DOI: 10.1017/s000711451100660x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Linoleic acid intake, plasma cholesterol and 10-year incidence of CHD in 20,000 middle-aged men and women in the Netherlands. Br J Nutr 2011; 107:1070-6. [PMID: 21816117 DOI: 10.1017/s0007114511003837] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We studied the associations of a difference in linoleic acid or carbohydrate intake with plasma cholesterol levels and risk of CHD in a prospective cohort study in the Netherlands. Data on diet (FFQ) and plasma total and HDL-cholesterol were available at baseline (1993-7) of 20,069 men and women, aged 20-65 years, who were initially free of CVD. Incidence of CHD was assessed through linkage with mortality and morbidity registers. During an average of 10 years of follow-up, 280 CHD events occurred. The intake of linoleic acid ranged from 3·6 to 8·0 % of energy (en%), whereas carbohydrate intake ranged from 47·6 to 42·5 en% across quintiles of linoleic acid intake. Linoleic acid intake was inversely associated with total cholesterol and HDL-cholesterol in women but not in men. Linoleic acid intake was not associated with the ratio of total to HDL-cholesterol. No association was observed between linoleic acid intake and CHD incidence, with hazard ratios varying between 0·83 and 1·00 (all P>0·05) compared to the bottom quintile. We conclude that a 4-5 en% difference in linoleic acid or carbohydrate intake did not translate into either a different ratio of total to HDL-cholesterol or a different CHD incidence.
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Labayen I, Moreno LA, Ruiz JR, Ortega FB, Sjostrom M, Huybrechts I, Gonzalez-Gross M, Spinneker A, De Henauw S, Manios Y, Molnar D, Leclercq C, Gottrand F. Associations of birth weight with serum long chain polyunsaturated fatty acids in adolescents; the HELENA study. Atherosclerosis 2011; 217:286-91. [DOI: 10.1016/j.atherosclerosis.2011.03.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 03/14/2011] [Accepted: 03/25/2011] [Indexed: 11/16/2022]
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Woodward M, Tunstall-Pedoe H, Batty GD, Tavendale R, Hu FB, Czernichow S. The prognostic value of adipose tissue fatty acids for incident cardiovascular disease: results from 3944 subjects in the Scottish Heart Health Extended Cohort Study. Eur Heart J 2011; 32:1416-23. [PMID: 21345851 DOI: 10.1093/eurheartj/ehr036] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
AIMS Dietary fats are routinely considered key determinants of cardiovascular risk, yet the scientific basis of this association has never been demonstrated using objective measures of fat intakes in a large prospective study in a general population. METHODS AND RESULTS Adipose tissue was taken from 3944 participants, predominantly aged 40-59 years, in Scotland, 1984-87. Percentages of individual fatty acids were measured using gas chromatography. Over a median of 19.5 years, 870 incident cardiovascular disease (CVD) events occurred. Hazard ratios (HRs) were obtained from Cox models and the additional prognostic value, accounting for variables in the Framingham and ASSIGN CVD risk scores, were assessed using discrimination indices. Adjusting for age, sex, total and HDL-cholesterol, systolic blood pressure, smoking, hypertensive medication use, diabetes, socio-economic status and family history, the percentage of monounsaturated adipose tissue fatty acids had a positive log-linear relationship with incident CVD: the HR comparing risk between the fourth and first quartiles was 1.29 (95% confidence interval: 1.05, 1.59). n-3 polyunsaturated fat showed the reverse trend, the corresponding result being 0.77 (0.63, 0.94). These two composite variables improved the classification of incident CVD events by 1.0 and 6.4%, respectively, with only the latter being significant at the 5% level. CONCLUSIONS A diet which is proportionately rich in polyunsaturated fat, as opposed to other fats, is expected to decrease the risk of CVD independently of the effects of common CVD risk factors, including social deprivation. Taking account of such diets improves the classification of future CVD events.
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Affiliation(s)
- Mark Woodward
- Cardiovascular Epidemiology, Institute of Cardiovascular Research, University of Dundee, Dundee, UK.
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Kwak JH, Paik JK, Kim OY, Jang Y, Lee SH, Ordovas JM, Lee JH. FADS gene polymorphisms in Koreans: association with ω6 polyunsaturated fatty acids in serum phospholipids, lipid peroxides, and coronary artery disease. Atherosclerosis 2010; 214:94-100. [PMID: 21040914 DOI: 10.1016/j.atherosclerosis.2010.10.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 09/26/2010] [Accepted: 10/04/2010] [Indexed: 01/28/2023]
Abstract
OBJECTIVE We investigated the association of polymorphisms in FADS genes with polyunsaturated fatty acids (PUFAs) in serum phospholipids, lipid peroxides, and coronary artery disease (CAD) in Koreans. METHODS In this case-control study, CAD patients (n=756, 40-79 years) and healthy controls (n=890) were genotyped for rs174537 near FADS1 (FEN1 rs174537G>T), FADS2 (rs174575, rs2727270), and FADS3 (rs1000778). We calculated the odds ratios (ORs) for CAD risk and measured serum PUFA composition and lipid peroxide. RESULTS Among four SNPs, only rs174537G>T differed in allele frequencies between controls and CAD patients after adjustment for age, BMI, cigarette smoking, alcohol consumption, hypertension, diabetes mellitus, and hyperlipidemia (P=0.017). The minor T allele was associated with a lower risk of CAD [OR 0.75 (95%CI 0.61-0.92), P=0.006] after adjustment. rs174537T carriers had a significantly higher proportion of linoleic acid (LA, 18:2ω6), lower arachidonic acid (AA, 20:4ω6), and lower ratios of AA/dihomo-γ-linolenic acid (DGLA, 20:3ω6) and AA/LA than G/G subjects in both control and CAD groups. In the control group, 174537T carriers had significantly lower levels of total- and LDL-cholesterol, malondialdehyde, and ox-LDL. In CAD patients, rs174537T carriers showed a larger LDL particle size than G/G subjects. The proportion of AA in serum phospholipids positively correlated with LDL-cholesterol, ox-LDL, and malondialdehyde in controls and with 8-epi-prostaglandin F(2α) in both control and CAD groups. CONCLUSION The rs174537T is associated with a lower proportion of AA in serum phospholipids and reduced CAD risk, in association with reduced total- and LDL-cholesterol and lipid peroxides.
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Affiliation(s)
- Jung Hyun Kwak
- Interdisciplinary Course of Science for Aging, Yonsei University, Seoul, South Korea
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Park JY, Paik JK, Kim OY, Chae JS, Jang Y, Lee JH. Interactions between the APOA5 -1131T>C and the FEN1 10154G>T polymorphisms on ω6 polyunsaturated fatty acids in serum phospholipids and coronary artery disease. J Lipid Res 2010; 51:3281-8. [PMID: 20802161 DOI: 10.1194/jlr.m010330] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We determined the contribution of the combination of FEN1 10154G>T with the most significant association in the analysis of plasma arachidonic acid (AA, 20:4ω6) and the APOA5-1131T>C on phospholipid ω6PUFA and coronary artery disease (CAD). Patients with CAD (n = 807, 27-81 years of age) and healthy controls (n = 1123) were genotyped for FEN1 10154G>T and APOA5-1131T>C. We found a significant interaction between these two genes for CAD risk (P = 0.007) adjusted for confounding factors. APOA5-1131C allele carriers had a higher CAD risk [odds ratio (OR):1.484, 95% confidence interval (CI):1.31-1.96; P = 0.005] compared with APOA5-1131TT individuals in the FEN1 10154GG genotype group but not in the FEN1 10154T allele group (OR:1.096, 95%CI:0.84-1.43; P = 0.504). Significant interactions between these two genes were also observed for the AA proportion (P = 0.04) and the ratio of AA/linoleic acid (LA, 18:2ω6) (P = 0.004) in serum phospholipids of controls. The APOA5-1131C allele was associated with lower AA (P = 0.027) and AA/LA (P = 0.014) only in controls carrying the FEN1 10154T allele. In conclusion, the interaction between these genes suggests that the FEN1 10154T variant allele decreases AA and AA/LA in the serum phospholipids of carriers of the APOA5-1131C allele, but contributes no significant increase in CAD risk for this population subset despite their increased triglylcerides and decreased apoA5.
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Affiliation(s)
- Ju Yeon Park
- National Research Laboratory of Clinical Nutrigenetics/Nutrigenomics, Department of Food and Nutrition, College of Human Ecology, Yonsei University, Seoul, Korea
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Simopoulos AP. Genetic variants in the metabolism of omega-6 and omega-3 fatty acids: their role in the determination of nutritional requirements and chronic disease risk. Exp Biol Med (Maywood) 2010; 235:785-95. [PMID: 20558833 DOI: 10.1258/ebm.2010.009298] [Citation(s) in RCA: 167] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The tissue composition of polyunsaturated fatty acids is important to health and depends on both dietary intake and metabolism controlled by genetic polymorphisms that should be taken into consideration in the determination of nutritional requirements. Therefore at the same dietary intake of linoleic acid (LA) and alpha-linolenic acid (ALA), their respective health effects may differ due to genetic differences in metabolism. Delta-5 and delta-6 desaturases, FADS1 and FADS2, respectively, influence the serum, plasma and membrane phospholipid levels of LA, ALA and long-chain polyunsaturated fatty acids during pregnancy, lactation, and may influence an infant's IQ, atopy and coronary heart disease (CHD) risk. At low intakes of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), polymorphisms at the 5-lipoxygenase (5-LO) level increase the risk for CHD whereas polymorphisms at cyclooxgenase-2 increase the risk for prostate cancer. At high intakes of LA the risk for breast cancer increases. EPA and DHA influence gene expression. In future, intervention studies on the biological effects of LA, ALA and LC-PUFAs, and the effects of genetic variants in FADS1 and FADS2, 5-LO and cyclooxygenase-2 should be taken into consideration both in the determination of nutritional requirements and chronic disease risk. Furthermore, genome-wide association studies need to include environmental exposures and include diet in the interaction between genetic variation and disease association.
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Affiliation(s)
- Artemis P Simopoulos
- The Center for Genetics, Nutrition and Health, 2001 S Street NW, Washington, DC 20009, USA.
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Lattka E, Illig T, Koletzko B, Heinrich J. Genetic variants of the FADS1 FADS2 gene cluster as related to essential fatty acid metabolism. Curr Opin Lipidol 2010; 21:64-9. [PMID: 19809313 DOI: 10.1097/mol.0b013e3283327ca8] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
PURPOSE OF REVIEW The delta-5 and delta-6 desaturases have long been known to be important enzymes in the endogenous formation of long-chain polyunsaturated fatty acids (LC-PUFAs). Cloning of the coding sequences and chromosomal localization of the desaturase encoding genes fatty acid desaturase 1 and 2 (FADS1 and FADS2) opened the way for analyses of genetic factors as regulators of desaturase activity and LC-PUFA homeostasis. The present review summarizes the recent association studies on FADS genotypes and LC-PUFA levels and suggests ideas how FADS genotypes can be integrated in future research. RECENT FINDINGS An initial candidate gene study reported highly significant associations between FADS gene cluster polymorphisms and fatty acid levels in serum phospholipids with an extraordinary high genetically explained variance for arachidonic acid levels of 28.5%. Carriers of the minor alleles had enhanced levels of desaturase substrates and decreased levels of desaturase products, suggesting a decline in desaturase expression or activity because of the polymorphisms. These results were replicated in several association studies additionally showing an effect in different human tissues as well as in a recent genome-wide association study on LC-PUFA levels. SUMMARY The validated strong association between FADS genotypes and fatty acid levels in diverse human tissues shows that FADS gene cluster polymorphisms are, in addition to nutritional regulation of fatty acid synthesis, a very important regulator of LC-PUFA synthesis.
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Affiliation(s)
- Eva Lattka
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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Friesen RW, Innis SM. Dietary arachidonic acid to EPA and DHA balance is increased among Canadian pregnant women with low fish intake. J Nutr 2009; 139:2344-50. [PMID: 19864401 DOI: 10.3945/jn.109.112565] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Arachidonic [ARA, 20:4(n-6)], eicosapentaenoic [EPA, 20:5(n-3)], and docosahexaenoic acids [DHA, 22:6(n-3)] occur in the diet in animal tissue lipids, play important roles in human development and health, but have interactive and opposing functions. Meat and poultry have higher ARA and fish are richer in EPA and DHA. National databases were recently revised to include complete data on ARA in foods. We used a validated FFQ and the revised nutrient databases to quantify the distribution of ARA, EPA, and DHA intakes and balance for 204 healthy Canadian pregnant women. We focused on intake distributions because risk of adverse health effects increases at lower nutrient intakes. RBC fatty acids were analyzed concurrenly with dietary assessment. The distribution of ARA, EPA, and DHA intakes were skewed (P < 0.001), with a median (5-95th percentile) of 107 (41-225), 65 (10-228), and 105 (10-430) mg/d ARA, EPA, and DHA, respectively. Fish provided 66 and 76% of EPA and DHA, respectively, whereas eggs, poultry, and meats provided 81% of ARA. Women consuming <101 g fish/wk consumed less EPA and DHA and had markedly elevated median dietary ARA:EPA and ARA:DHA ratios and RBC lipid ARA:EPA + DHA ratios compared with women consuming >or=101 g fish/wk (P < 0.001). Relatively small increases in fish intake of 1-2 servings (25-50 g)/wk corrected the distorted dietary (n-6):(n-3) fatty acid balance among women consuming meats, but not fish. Median fish and DHA intakes below the recommended 1-2 servings/wk fish for pregnant women suggest major changes in the availability, cost, or acceptance of fish are needed.
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Affiliation(s)
- Russell W Friesen
- Child and Family Research Institute, Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
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Do FADS genotypes enhance our knowledge about fatty acid related phenotypes? Clin Nutr 2009; 29:277-87. [PMID: 19948371 DOI: 10.1016/j.clnu.2009.11.005] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 10/22/2009] [Accepted: 11/15/2009] [Indexed: 11/22/2022]
Abstract
Several physiological processes, such as visual and cognitive development in early life, are dependent on the availability of long-chain polyunsaturated fatty acids (LC-PUFAs). Furthermore, the concentration of LC-PUFAs in phospholipids has been associated with numerous complex diseases like cardiovascular disease, atopic disease and metabolic syndrome. The level and composition of LC-PUFAs in the human body is mainly dependent on their dietary intake or on the intake of fatty acid precursors, which are endogenously elongated and desaturated to physiologically active LC-PUFAs. The delta-5 and delta-6 desaturase are the most important enzymes in this reaction cascade. In the last few years, several studies have reported an association between single nucleotide polymorphisms (SNPs) in the two desaturase encoding genes (FADS1 and FADS2) and the concentration of omega-6 and omega-3 fatty acids. This shows that beside nutrition, genetic factors play an important role in the regulation of LC-PUFAs as well. This review focuses on current knowledge of the impact of FADS genotypes on LC-PUFA and lipid metabolism and discusses their influence on infant intellectual development, neurological conditions, metabolic disease as well as cardiovascular disease.
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Pezeshkian M, Noori M, Najjarpour-Jabbari H, Abolfathi A, Darabi M, Darabi M, Shaaker M, Shahmohammadi G. Fatty acid composition of epicardial and subcutaneous human adipose tissue. Metab Syndr Relat Disord 2009; 7:125-31. [PMID: 19422139 DOI: 10.1089/met.2008.0056] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Epicardial adipose tissue has special properties that distinguish it from the more widely studied depots of adipose tissue. OBJECTIVES We undertook this study to investigate regional differences between epicardial and subcutaneous adipose tissue fat composition, as well as associations between these measures and metabolic variables. METHODS Epicardial and subcutaneous peripheral adipose tissue were collected during coronary artery bypass grafting from 42 patients (ages 37-65) with coronary artery disease (CAD). The fatty acid composition of adipose tissue was determined by gas liquid chromatography (GLC). RESULTS The saturated fatty acids, including myristic acid (14:0), palmitic acid (16:0), and stearic acid (18:0), were higher, and the unsaturated fatty acids, including palmitoleic acid (16:1n-7), oleic acid (18:1n-9), linoleic acid (18:2n-6), and linolenic acid (18:3n-3), were lower than the subcutaneous adipose tissue. The presence of hypertension was positively correlated with the 16:1n-7 (r = 0.407, P = 0.032) and 18:1n-11(r = 0.370, P = 0.027), and negatively correlated with 18:1n-9 (r = -0.367, P = 0.036) and 18:2n-6 (r = -0.446, P = 0.006) contents of epicardial adipose tissue after adjustment for body mass index. CONCLUSIONS Regional differences may be observed in fatty acid composition, suggesting a depot specific impact of stored fatty acids on adipocyte function and metabolism.
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Affiliation(s)
- Masoud Pezeshkian
- Cardiovascular Research Center and 2Department of Biochemistry, School of Medicine, Tabriz University, Medical Sciences, Tabriz, Iran
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Harris WS, Mozaffarian D, Rimm E, Kris-Etherton P, Rudel LL, Appel LJ, Engler MM, Engler MB, Sacks F. Omega-6 fatty acids and risk for cardiovascular disease: a science advisory from the American Heart Association Nutrition Subcommittee of the Council on Nutrition, Physical Activity, and Metabolism; Council on Cardiovascular Nursing; and Council on Epidemiology and Prevention. Circulation 2009; 119:902-7. [PMID: 19171857 DOI: 10.1161/circulationaha.108.191627] [Citation(s) in RCA: 516] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Campbell KL, Makar KW, Kratz M, Foster-Schubert KE, McTiernan A, Ulrich CM. A pilot study of sampling subcutaneous adipose tissue to examine biomarkers of cancer risk. Cancer Prev Res (Phila) 2009; 2:37-42. [PMID: 19139016 PMCID: PMC2785801 DOI: 10.1158/1940-6207.capr-08-0073] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Examination of adipose tissue biology may provide important insight into mechanistic links for the observed association between higher body fat and risk of several types of cancer, in particular colorectal and breast cancer. We tested two different methods of obtaining adipose tissue from healthy individuals. Ten overweight or obese (body mass index, 25-40 kg/m(2)), postmenopausal women were recruited. Two subcutaneous abdominal adipose tissue samples were obtained per individual (i.e., right and left lower abdominal regions) using two distinct methods (method A: 14-gauge needle with incision, versus method B: 16-gauge needle without incision). Gene expression was examined at the mRNA level for leptin, adiponectin, aromatase, interleukin 6 (IL-6), and tumor necrosis factor-alpha (TNF-alpha) in flash-frozen tissue, and at the protein level for leptin, adiponectin, IL-6, and TNF-alpha following short-term culture. Participants preferred biopsy method A and few participants reported any of the usual minor side effects. Gene expression was detectable for leptin, adiponectin, and aromatase, but was below detectable limits for IL-6 and TNF-alpha. For detectable genes, relative gene expression in adipose tissue obtained by methods A and B was similar for adiponectin (r = 0.64, P = 0.06) and leptin (r = 0.80, P = 0.01), but not for aromatase (r = 0.37,P = 0.34). Protein levels in tissue culture supernatant exhibited good intra-assay agreement [coefficient of variation (CV), 1-10%], with less agreement for intraindividual agreement (CV, 17-29%) and reproducibility, following one freeze-thaw cycle (CV, >14%). Subcutaneous adipose tissue biopsies from healthy, overweight individuals provide adequate amounts for RNA extraction, gene expression, and other assays of relevance to cancer prevention research.
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Affiliation(s)
- Kristin L Campbell
- Cancer Prevention Program, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, M4-B402, Seattle, WA 98109-1024, USA
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Noori M, Darabi M, Rahimipour A, Rahbani M, Abadi NA, Darabi M, Ghatrehsamani K. Fatty acid composition of HDL phospholipids and coronary artery disease. J Clin Lipidol 2008; 3:39-44. [PMID: 21291787 DOI: 10.1016/j.jacl.2008.11.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2008] [Revised: 11/19/2008] [Accepted: 11/29/2008] [Indexed: 11/29/2022]
Abstract
BACKGROUND The phospholipid fatty acid content of high-density lipoprotein (HDL) partially reflects that of the diet and has been reported to be associated with several important biological functions that might serve as risk markers for coronary heart disease. OBJECTIVE To investigate whether fatty acid composition of HDL phospholipids correlates with angiographically documented coronary artery disease (CAD). METHODS The population included 212 patients who underwent clinically indicated coronary angiography. The patients were classified with significantly diseased arteries (SDA) if one or more coronary arteries had a stenosis >50% and with minimally diseased arteries (MDA) if there was no significant stenosis (<40%) in any artery. The severity of CAD was expressed by the number of affected vessels. The fatty acid composition of HDL phospholipids was determined by gas liquid chromatography. Multivariate analyses were used to test the independence of associations between the presence and severity of CAD as outcome variables and fatty acid composition of HDL phospholipids. RESULTS Patients with SDA showed significantly lower levels of linoleic acid (P = .041), eicosapentaenoic acid (EPA) (P = .027), and docosahexaenoic acid (DHA) (P = .026) than patients with MDA in univariate analyses. The association of linoleic acid (odds ratio [OR] .90, P < .05), EPA (OR, 0.41, P < .02), and DHA (OR, 0.48, P < .02) remained statistically significant in the multivariate analyses. The content of EPA (β = -0.23, P < .01) and DHA (β = -0.17, P < .05) remained inversely significantly associated with the severity of CAD. CONCLUSIONS This study shows that polyunsaturated fatty acids, including EPA and DHA content of HDL particles, are independently associated with the presence and severity of angiographically documented CAD.
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Affiliation(s)
- Mohammad Noori
- Department of Biochemistry, School of Medicine, Tabriz University of Medical Sciences, Golgasht Avenue, Tabriz
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Martinelli N, Girelli D, Malerba G, Guarini P, Illig T, Trabetti E, Sandri M, Friso S, Pizzolo F, Schaeffer L, Heinrich J, Pignatti PF, Corrocher R, Olivieri O. FADS genotypes and desaturase activity estimated by the ratio of arachidonic acid to linoleic acid are associated with inflammation and coronary artery disease. Am J Clin Nutr 2008; 88:941-9. [PMID: 18842780 DOI: 10.1093/ajcn/88.4.941] [Citation(s) in RCA: 246] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND The delta-5 and delta-6 desaturases, encoded by FADS1 and FADS2 genes, are key enzymes in polyunsaturated fatty acid (PUFA) metabolism that catalyze the conversion of linoleic acid (LA) into arachidonic acid (AA) and that of alpha-linolenic acid (ALA) into eicosapentaenoic acid (EPA). Single-nucleotide polymorphisms (SNPs) in FADS1 and FADS2 have been associated with different concentrations of AA and LA, and those associations have possible functional consequences for desaturase activity. OBJECTIVE We aimed to evaluate the possible association among FADS genotypes, desaturase activity, inflammation, and coronary artery disease (CAD). DESIGN Thirteen FADS SNPs and the ratio of AA to LA (AA/LA) on red blood cell (RBC) membranes, a marker of desaturase activity, were evaluated in 876 subjects with (n = 610) or without (n = 266) angiographically documented CAD. RESULTS Both AA/LA and the ratio of EPA to ALA (EPA/ALA) were higher in patients with CAD than in those without CAD, but, in a multiple logistic regression model, only a higher AA/LA resulted an independent risk factor for CAD (odds ratio: 2.55; 95% CI: 1.61, 4.05 for higher compared with lower ratio tertile; P for trend < 0.001). Furthermore, concentrations of high-sensitivity C-reactive protein increased progressively across tertiles of AA/LA. Graded increases in high-sensitivity C-reactive protein concentrations and CAD risk were related to the carriership of FADS haplotypes, including the alleles associated with a higher ratio. CONCLUSION In populations following a Western diet, subjects carrying FADS haplotypes that are associated with higher desaturase activity may be prone to a proinflammatory response favoring atherosclerotic vascular damage.
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Affiliation(s)
- Nicola Martinelli
- Department of Clinical and Experimental Medicine and the Section of Biology and Genetics, University of Verona, Verona, Italy
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Lemaitre RN, Siscovick DS, Berry EM, Kark JD, Friedlander Y. Familial aggregation of red blood cell membrane fatty acid composition: the Kibbutzim Family Study. Metabolism 2008; 57:662-8. [PMID: 18442630 DOI: 10.1016/j.metabol.2007.12.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2007] [Accepted: 12/12/2007] [Indexed: 10/22/2022]
Abstract
The fatty acid composition of membranes plays an important role in health and diseases. Whether genetic factors play a role in interindividual variability in membrane fatty acid levels has received limited attention. Using variance decomposition methods, we estimated the heritability of red blood cell (RBC) membrane fatty acids in an unselected population sample of 80 families (205 male and 212 female subjects) living in kibbutz settlements in Israel. Fatty acid levels were measured by gas chromatography. We estimated that polygenes explained 40% to 70% of the sex- and age-adjusted interindividual variability in all RBC fatty acids: saturated, monounsaturated, and polyunsaturated. The heritability estimates remained very similar after further adjustment for smoking, alcohol consumption, physical activity, lipoproteins, body mass index, waist to hip ratio, education, and religiosity. In bivariate genetic analyses, we observed positive genetic correlations for the fatty acid pairs 20:4n6-22:6n3 and 20:5n3-22:6n3, and negative genetic correlations for the pairs 16:0-20:4n6, 16:0-22:6n3, 18:1n9-20:3n6, 18:2n6-20:4n6, 18:2n6-24:0, and 20:3n6-20:4n6, suggesting that shared effects of the same sets of loci account for 12% to 30% of the additive genetic variance in these pairs of fatty acids. This study suggests a considerable polygenic component for all RBC membrane fatty acids and provides evidence that shared genetic effects account for the additive genetic variance in various fatty acid pairs. Future studies are needed to map the genes underlying the interindividual variation in these inherited phenotypes.
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Affiliation(s)
- Rozenn N Lemaitre
- Department of Medicine, Cardiovascular Health Research Unit, University of Washington, Seattle, WA 98101, USA.
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