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Li J, Hu SB, He YM, Zhuo CF, Zhou RL, Chen F, Li HY, Deng ZY. 9c11tCLA modulates 11t18:1 and 9t18:1 induced inflammations differently in human umbilical vein endothelial cells. Sci Rep 2018; 8:1535. [PMID: 29367652 PMCID: PMC5784167 DOI: 10.1038/s41598-018-19729-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 01/04/2018] [Indexed: 02/02/2023] Open
Abstract
Endothelial inflammation is recognized as the initial stage of a multistep process leading to coronary heart disease (CHD). Recently, the different effects of industrial trans fatty acids (elaidic acid, 9t18:1) and ruminant trans fatty acids (vaccenic acid, 11t18:1) on CHD have been reported in epidemiological and animal studies, however, the mechanism was not fully studied. Therefore, the objective of this study was to explore the underlying mechanism by which 9t18:1 and 11t18:1 affect human umbilical vein endothelial cells (HUVECs) inflammation. We found that 9c11t-CLA modulated the inflammation of HUVECs induced by 9t18:1 and 11t18:1. Fatty acid composition, pro-inflammatory factors, phosphorylation of MAPKs, and the TLR4 level in HUVECs altered by 11t18:1 induction, collectively suggest that the bio-conversion of 11t18:1 to 9c11tCLA might be the cause why 11t18:1 and 9t18:1 have distinct influences on endothelial injuries. It was concluded that it is biosynthesis of 9c11t CLA from11t18:1, and the modulation of TLR4-MAPK pathway by 9c11t CLA, which at least partially account for the slight effect of 11t18:1 on endothelial inflammation.
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Affiliation(s)
- Jing Li
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Sheng-Ben Hu
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Yue-Ming He
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Cheng-Fei Zhuo
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Ruo-Lin Zhou
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Fang Chen
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Hong-Yan Li
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China
| | - Ze-Yuan Deng
- State Key Lab of Food Science and Technology, Nanchang University, Nanchang, 330047, China. .,Institute for Advanced Study, Nanchang University, Nanchang, 330031, China.
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2
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The effects of trans-fatty acids on TAG regulation in mice depend on dietary unsaturated fatty acids. Br J Nutr 2017; 116:611-20. [PMID: 27464460 DOI: 10.1017/s0007114516002415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The aim of this study was to investigate the effects of trans-fatty acids (TFA) on liver and serum TAG regulation in mice fed diets containing different proportions of n-3, n-6 and n-9 unsaturated fatty acids (UFA) from olive (O), maize (C) or rapeseed (R) oils partially substituted or not with TFA (Ot, Ct and Rt, respectively). Male CF1 mice were fed (30 d) one of these diets. The effects of the partial substitution (1 %, w/w) of different UFA with TFA on the activity and expression of hepatic enzymes involved in lipogenesis and fatty acids oxidation were evaluated, as well as their transcription factor expressions. Some of the mechanisms involved in the serum TAG regulation, hepatic VLDL rich in TAG (VLDL-TAG) secretion rate and lipoprotein lipase (LPL) activity were assessed. In liver, TFA induced an increase in TAG content in the Ot and Rt groups, and this effect was associated with an imbalance between lipogenesis and β-oxidation. In the Ot group, exacerbated lipogenesis may be one of the mechanisms responsible for the liver steatosis induced by TFA, whereas in Rt it has been related to a decreased β-oxidation, compared with their respective controls. The enhanced hepatic VLDL-TAG secretion in the Ot and Rt groups was compensated with a differential removal of TAG by LPL enzyme in extrahepatic tissues, leading to unchanged serum TAG levels. In brief, the effects of low levels of TFA on liver and serum TAG regulation in mice depend on the dietary proportions of n-3, n-6 and n-9 UFA.
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Da Silva MS, Julien P, Bilodeau JF, Barbier O, Rudkowska I. Trans Fatty Acids Suppress TNF-α-Induced Inflammatory Gene Expression in Endothelial (HUVEC) and Hepatocellular Carcinoma (HepG2) Cells. Lipids 2017; 52:315-325. [PMID: 28315997 DOI: 10.1007/s11745-017-4243-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 03/07/2017] [Indexed: 12/12/2022]
Abstract
Trans fatty acids (TFA) intake has been linked to cardiovascular diseases and liver diseases; yet the effect of TFA on inflammation remains controversial. Accordingly, the objective of this paper was to determine the in vitro effects of TFA on inflammatory gene expression. Human umbilical vein endothelial cells (HUVEC) and human hepatocellular carcinoma (HepG2) cells were treated for 24 h with either trans-vaccenic acid (tVA), trans-palmitoleic acid (tPA) or elaidic acid (EA) at concentrations of 5-150 µM, or with a mixture of tVA and tPA (150/50 µM). All TFA were highly incorporated into cell membranes, as determined by gas chromatography, representing 15-20% of total fatty acids in HUVEC and 3-8% in HepG2 cells. Incorporation of EA, a common industrial TFA, increased the ratio of the stearoyl-CoA desaturase (SCD-1), a key enzyme involved in fatty acid metabolism. Ruminant TFA, including tVA, tPA and the mixture of tVA and tPA, significantly reduced the TNF-α-induced gene expression of TNF, VCAM-1 and SOD2 in HUVEC, as well as TNF and IL-8 in HepG2 cells. EA also decreased inflammatory gene expression in HUVEC, but not in HepG2 cells. The inhibition of peroxisome proliferator-activated receptor (PPAR)-γ did not influence the effects of TFA on gene expression. Overall, physiological and supraphysiological concentrations of TFA, especially tVA and tPA, prevented inflammatory gene expression in vitro. This effect is independent of PPAR-γ activation and may be due to an alteration of fatty acid metabolism in cell membranes caused by the high incorporation of TFA.
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Affiliation(s)
- Marine S Da Silva
- Endocrinology and Nephrology Unit, Centre de recherche du CHU de Québec, Université Laval, 2705, boul. Laurier, Québec City, QC, G1V 4G2, Canada.,The Department of Kinesiology, Faculty of Medicine, Université Laval, 2325 rue de l'Université, Québec City, QC, G1V 0A6, Canada
| | - Pierre Julien
- Endocrinology and Nephrology Unit, Centre de recherche du CHU de Québec, Université Laval, 2705, boul. Laurier, Québec City, QC, G1V 4G2, Canada.,The Department of Medicine, Faculty of Medicine, Université Laval, 2325 rue de l'Université, Québec City, QC, G1V 0A6, Canada
| | - Jean-François Bilodeau
- Endocrinology and Nephrology Unit, Centre de recherche du CHU de Québec, Université Laval, 2705, boul. Laurier, Québec City, QC, G1V 4G2, Canada.,The Department of Medicine, Faculty of Medicine, Université Laval, 2325 rue de l'Université, Québec City, QC, G1V 0A6, Canada
| | - Olivier Barbier
- Laboratory of Molecular Pharmacology, Centre de recherche du CHU de Québec, Université Laval, 2705, boul. Laurier, Québec City, QC, G1V 4G2, Canada.,The Faculty of Pharmacy, Université Laval, 2325 rue de l'Université, Québec City, QC, G1V 0A6, Canada
| | - Iwona Rudkowska
- Endocrinology and Nephrology Unit, Centre de recherche du CHU de Québec, Université Laval, 2705, boul. Laurier, Québec City, QC, G1V 4G2, Canada. .,The Department of Kinesiology, Faculty of Medicine, Université Laval, 2325 rue de l'Université, Québec City, QC, G1V 0A6, Canada.
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Krogager TP, Nielsen LV, Kahveci D, Dyrlund TF, Scavenius C, Sanggaard KW, Enghild JJ. Hepatocytes respond differently to major dietary trans fatty acid isomers, elaidic acid and trans-vaccenic acid. Proteome Sci 2015; 13:31. [PMID: 26628894 PMCID: PMC4665887 DOI: 10.1186/s12953-015-0084-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 11/22/2015] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND It has been discussed if the adverse health effect associated with the ingestion of trans fatty acids correlates with the food source, as the composition of the isomers varies in different foods. We have investigated the hepatocellular responses to the predominant trans fatty acid isomers in industrially produced partially hydrogenated vegetable oils (elaidic acid) and products of ruminant origin (trans-vaccenic acid). RESULTS The responses of HepG2-SF cells exposed to 100 μM fatty acids during 7 days were examined. Elaidic acid decreased the cellular proliferation rate while trans-vaccenic acid had no effect. Analysis of cellular triacylglycerol fractions showed, that both trans fatty acids were metabolized by HepG2-SF cells, although elaidic acid, to a higher degree than trans-vaccenic, accumulated in the triacylglycerol fraction. Proteome analysis revealed that the overlap of differentially regulated proteins only contained four proteins, suggesting that the two trans fatty acid isomers affect the cells in different ways. The data are available via ProteomeXchange with identifier PXD000760. CONCLUSIONS Our investigations revealed that the hepatocellular response to the two most abundant dietary positional C18:1 trans fatty acid isomers differ substantially. In addition, the results suggest that trans-vaccenic acid does not affect cholesterol metabolism adversely compared to elaidic acid.
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Affiliation(s)
- Toke P Krogager
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Lone Vendel Nielsen
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Derya Kahveci
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Thomas F Dyrlund
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Carsten Scavenius
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Kristian W Sanggaard
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Jan J Enghild
- Department of Molecular Biology and Genetics and iNANO, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
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Beppu F, Asanuma M, Kawamura Y, Nagai T, Yoshinaga K, Mizobe H, Kojima K, Kasatani S, Nagao K, Kubo A, Kanda J, Gotoh N. Trans-octadecenoic Acid Positional Isomers Have Different Accumulation and Catabolism Properties in Mice. J Oleo Sci 2015; 64:1159-67. [PMID: 26521809 DOI: 10.5650/jos.ess15139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Trans fatty acids (TFA) are considered risk factors for cardiovascular disease (CVD), while the details of distribution and metabolism of the individual isomers are not clear. Here we investigated the accumulation and catabolic rate of TFA positional isomers of octadecenoic acid (18:1) in mice. ICR mice were fed deuterium- and [1-(13)C] stable isotope-labeled trans-9-18:1 (9t-18:1*), trans-10-18:1 (10t-18:1*), or trans-11-18:1 (11t-18:1*) for 2 or 4 weeks, or a TFA mixture (9t-18:1*, 10t-18:1*, and 11t-18:1*) for 3 weeks. Analysis of whole-body tissues by gas chromatography-chemical ionization mass spectrometry revealed the highest 9t-18:1* levels in the heart. Significant differences in the accumulation of the respective trans-18:1 were observed in the heart and erythrocytes, where 9t- > 11t- > 10t-18:1*, but no significant difference was observed in the liver or white adipose tissue (WAT). Mice fed on 11t-18:1 demonstrated accumulation of endogenously synthesized conjugated linoleic acid in the liver, WAT, and heart, but any other metabolites were not found in other groups. Furthermore, we analyzed catabolic rates of single-dose-administered trans-18:1* isomers into [(13)C]-labeled CO2 using isotope-ratio mass spectrometry, and the 10t-18:1*catabolic rate was significantly higher than those of 9t- and 11t-18:1*. We found that the accumulation and catabolism of trans-18:1 positional isomers varied in these mice. Differential accumulation in tissues suggests that individual TFA positional isomers may play different roles in human health.
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Affiliation(s)
- Fumiaki Beppu
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology
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Gomes A, Correia G, Coelho M, Araújo JR, Pinho MJ, Teixeira AL, Medeiros R, Ribeiro L. Dietary unsaturated fatty acids differently affect catecholamine handling by adrenal chromaffin cells. J Nutr Biochem 2015; 26:563-70. [DOI: 10.1016/j.jnutbio.2014.12.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 11/25/2014] [Accepted: 12/10/2014] [Indexed: 01/21/2023]
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Fariña AC, González MA, Scalerandi MV, Lavandera JV, Bernal CA. Nutritional and metabolic effects of dietary
trans
fats depend on the intake of linoleic acid. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201400288] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Ana Clara Fariña
- Cátedra Bromatología y Nutrición, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del LitoralCiudad UniversitariaSanta FeArgentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Santa FeArgentina
| | - Marcela Aída González
- Cátedra Bromatología y Nutrición, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del LitoralCiudad UniversitariaSanta FeArgentina
| | - María Victoria Scalerandi
- Cátedra Bromatología y Nutrición, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del LitoralCiudad UniversitariaSanta FeArgentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Santa FeArgentina
| | - Jimena Verónica Lavandera
- Cátedra Bromatología y Nutrición, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del LitoralCiudad UniversitariaSanta FeArgentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Santa FeArgentina
| | - Claudio Adrián Bernal
- Cátedra Bromatología y Nutrición, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del LitoralCiudad UniversitariaSanta FeArgentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Santa FeArgentina
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Vahmani P, Meadus WJ, Turner TD, Duff P, Rolland DC, Mapiye C, Dugan MER. Individual trans 18:1 Isomers are Metabolised Differently and Have Distinct Effects on Lipogenesis in 3T3-L1 Adipocytes. Lipids 2014; 50:195-204. [DOI: 10.1007/s11745-014-3982-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 11/25/2014] [Indexed: 12/21/2022]
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Enke U, Jaudszus A, Schleussner E, Seyfarth L, Jahreis G, Kuhnt K. Fatty acid distribution of cord and maternal blood in human pregnancy: special focus on individual trans fatty acids and conjugated linoleic acids. Lipids Health Dis 2011; 10:247. [PMID: 22208621 PMCID: PMC3295739 DOI: 10.1186/1476-511x-10-247] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Accepted: 12/30/2011] [Indexed: 01/21/2023] Open
Abstract
Background Maternal nutrition in pregnancy has a crucial impact on the development of the fetus. Dietary trans fatty acids (tFA) are known to have adverse health effects, especially during pregnancy. However, the distribution of tFA produced via partial hydrogenation of vegetable oils (mainly elaidic acid; t9) differs compared to ruminant-derived tFA (mainly vaccenic acid; t11). Recent findings indicate that they may have different impact on human health. Therefore, in this study, plasma and erythrocytes of mother-child pairs (n = 55) were sampled to investigate the distribution of tFA, including individual trans C18:1 fatty acids and conjugated linoleic acids (CLA) in fetal related to maternal lipids; with additional consideration of maternal dairy fat intake. Results Portion of t9 and t11, but also of c9,t11 CLA was higher in maternal than in fetal blood lipids. The portion of t9 in maternal and fetal lipids differed only slightly. In contrast, the portion of fetal t11 was only half of that in maternal blood. This led to a fetal t9/t11-index in plasma and erythrocytes being twice as high compared to the maternal values. A high dairy fat intake resulted in elevated portions of t11 and its Δ9-desaturation product c9,t11 CLA in maternal blood. In contrast, in the respective fetal blood lipids only c9,t11 CLA, but not t11 was increased. Nevertheless, a positive association between maternal and fetal plasma exists for both t11 and c9,t11 CLA. Furthermore, in contrast to t9, t11 was not negatively associated with n-3 LC-PUFA in fetal blood lipids. Conclusions Fetal blood fatty acid composition essentially depends on and is altered by the maternal fatty acid supply. However, in addition to dietary factors, other aspects also contribute to the individual fatty acid distribution (oxidation, conversion, incorporation). The lower portion of fetal t11 compared to maternal t11, possibly results from Δ9-desaturation to c9,t11 CLA and/or oxidation. Based on the fatty acid distribution, it can be concluded that t11 differs from t9 regarding its metabolism and their impact on fetal LC-PUFA.
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Affiliation(s)
- Uta Enke
- Placenta Laboratory, Department of Obstetrics, Jena University Hospital,Friedrich Schiller University Jena, Bachstrasse 18, Jena, Germany
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Du ZY, Degrace P, Gresti J, Loreau O, Clouet P. Vaccenic and elaidic acid equally esterify into triacylglycerols, but differently into phospholipids of fed rat liver cells. Lipids 2011; 46:647-57. [PMID: 21614647 DOI: 10.1007/s11745-011-3569-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 05/02/2011] [Indexed: 10/18/2022]
Abstract
Elaidic acid (trans-9-C₁₈:₁ or trans-9) is assumed to exert atherogenic effects due to its double bond configuration. The possibility that trans-9 and vaccenic acid (trans-11-C₁₈:₁ or trans-11), its positional isomer, were biochemically equivalent and interchangeable compounds, was investigated by reference to their cis-isomers through esterification-related activities using rat liver cells and subcellular fractions. In hepatocytes, both trans-C₁₈:₁ were incorporated to the same extent in triacylglycerols, but trans-9 was more esterified than trans-11 into phospholipids (P < 0.05). Glycerol-3-phosphate acyltransferase activity in microsomes was lower with trans-11 than with trans-9, while this activity in mitochondria was ~40% greater with trans-11 than with trans-9 (P < 0.05). Activity of 2-lysophosphatidic acid acyltransferase in microsomes was of comparable extent with both trans isomers, but activity of 2-lysophosphatidylcholine acyltransferase was significantly greater with trans-9 than with trans-11 at P < 0.01. Lipoproteins secreted by hepatocytes reached equivalent levels in the presence of any isomers, but triacylglycerol production was more elevated with trans-11 than with trans-9 at P < 0.05. Cholesterol efflux from previously labelled hepatocytes was lower with trans-11 than with trans-9. When these cells were exposed to either trans-C₁₈:₁, the gene expression of proteins involved in fatty acid esterification and lipoprotein synthesis was unaffected, which indicates that the biochemical differences essentially depended on enzyme/substrate affinities. On the whole, vaccenic and elaidic acid were shown to incorporate cell phospholipids unequally, at least in vitro, which suggests they can differently affect lipid metabolic pathways in normal cells.
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Affiliation(s)
- Zhen-Yu Du
- Faculté des Sciences Gabriel, UMR 866, INSERM-UB, 21000, Dijon, France
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