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Li C, Zhang Y, Ge Y, Qiu B, Zhang D, Wang X, Liu W, Tao H. Comparative transcriptome and microbiota analyses provide new insights into the adverse effects of industrial trans fatty acids on the small intestine of C57BL/6 mice. Eur J Nutr 2020; 60:975-987. [PMID: 32564148 DOI: 10.1007/s00394-020-02297-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 06/04/2020] [Indexed: 12/25/2022]
Abstract
PURPOSE To reveal the mechanism that links industrial trans fatty acids (iTFAs) to various chronic diseases, we examined the impact of iTFAs on the local microenvironment of the small intestine (duodenum, jejunum and ileum). METHODS Forty male 8-week-old mice were fed diets containing one of the following: (1) low soybean oil (LS); (2) high soybean oil (HS); (3) low partially hydrogenated oil (LH), and (4) high partially hydrogenated oil (HH). The analysis of microbiota from small intestinal content was performed by real-time qPCR. The fatty acid composition of small intestine mucosa was measured by GC/MS, and comparative transcriptome of the small intestinal mucosa was analyzed by RNA-sequencing. RESULTS The intake of iTFAs changed the fatty acid spectrum of the small intestine mucosa, especially the excessive accumulation of iTFA (mainly elaidic acid). For microbiota, the relative abundance of δ- and γ-proteobacteria, Lactobacillus, Desulfovibrio, Peptostreptococcus and Turicibacter were significantly different in the iTFA diet groups compared to the control group. Based on the identification of differently expressed genes(DEGs) and pathway annotation, comparative transcriptome analysis of the small intestine mucosa revealed obvious overexpression of genes involved in the extracellular matrix (ECM)-receptor interaction and the peroxisome proliferator-activated receptor signaling pathway, which suggests that ECM remodeling and abnormal lipid metabolism may have occurred with iTFA ingestion. CONCLUSION Our research demonstrated multiple adverse effects of iTFA that may have originated from the small intestine. This finding could be to facilitate the development of new strategies to suppress iTFA-related diseases by reversing the adverse effects of iTFA on intestinal health.
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Affiliation(s)
- Can Li
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250353, China
| | - Yuhan Zhang
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China.,College of Life Science, Shandong Normal University, Jinan, 250014, China
| | - Yueting Ge
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
| | - Bin Qiu
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
| | - Di Zhang
- Qilu Hospital, Shandong University, Jinan, 250012, China
| | - Xianshu Wang
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
| | - Wei Liu
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China.
| | - Haiteng Tao
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250353, China.
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Abstract
The gut microbiota is directly influenced by dietary components, and it plays critical roles in chronic diseases. Excessive consumption of trans-fatty acids (TFA) is associated with obesity induced by alterations in gut microbiota, but the links between obesity and gut microbiota remain unclear. Therefore, studies examining the impact of TFA on intestinal microflora are essential. In our study, we performed 16S ribosomal RNA gene sequencing on faecal samples from Sprague-Dawley rats fed a basal diet (control (CON) group), high-fat (HF) diet (diet-induced obesity (DIO) group) or TFA diets (1 % TFA group and 8 % TFA group) for 8 weeks to investigate the effects of TFA/HF diets on obesity and gut microbiota composition. We found that the TFA/HF diets significantly induced obesity and changes in blood and brain physiological parameters of the rats. The relative abundance of the phyla Firmicutes and Bacteroidetes was inversely altered in the three test groups compared with the CON group. Proteobacteria increased slightly in the DIO, 1 % TFA and 8 % TFA groups. The genus Bacteroides increased in the DIO and 1 % TFA groups, but Muribaculaceae decreased in all experimental groups compared with the CON group. Moreover, significant differences were observed among clusters of orthologous group functional categories of the four dietary groups. Our observations suggested that the TFA/HF diets induced obesity and dysfunction of gut microbiota. Gut dysbiosis might mediate the obesity effects of TFA/HF diets.
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Kwon Y. Effect oftrans–fatty acids on lipid metabolism: Mechanisms for their adverse health effects. FOOD REVIEWS INTERNATIONAL 2015. [DOI: 10.1080/87559129.2015.1075214] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Garshick M, Mochari-Greenberger H, Mosca L. Reduction in dietary trans fat intake is associated with decreased LDL particle number in a primary prevention population. Nutr Metab Cardiovasc Dis 2014; 24:100-106. [PMID: 24099723 PMCID: PMC3943937 DOI: 10.1016/j.numecd.2013.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 05/28/2013] [Accepted: 06/09/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND AND AIMS Increased trans fat intake has been associated with an increased risk of cardiovascular disease (CVD). While the effect of trans fat on traditional lipids is known, it's association with LDL particle number (LDL-P), a novel marker of CVD risk, has not been established. The purpose of this study was to determine the association between trans fat intake and LDL-P over 1-year among individuals participating in a lifestyle intervention trial. METHODS AND RESULTS Family members (N = 400, 33% male, mean age 48 ± 13) of patients hospitalized with CVD who participated in a 1-year randomized controlled primary prevention lifestyle intervention trial and had complete dietary data and LDL-P measures at baseline and 1-year. Change in trans fat as a percentage of total diet and mean absolute change in LDL-P at 1-year was assessed using multivariate adjusted linear regression models. At baseline, there was a significant positive correlation between dietary trans fat intake and LDL-P (Beta = 37, p = 0.04). For every 1 percent change in trans fat intake there was a 27 nmol/L change in LDL-P (Beta = 27, p = 0.04) over 1-year which was independent of baseline predictors and confounders (age, sex, smoking, statin use, waist size and physical activity; Beta = 30, p = 0.03). CONCLUSION A reduction in trans fat intake over 1-year was significantly associated with a reduction in LDL-P independent of potential confounders. Healthcare providers should reinforce the beneficial impact of a healthy diet, and in particular modifications in trans fat intake on improving lipid profiles.
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Affiliation(s)
- M Garshick
- Preventive Cardiology Program, Columbia University Medical Center/New York-Presbyterian Hospital, New York, NY, USA
| | - H Mochari-Greenberger
- Preventive Cardiology Program, Columbia University Medical Center/New York-Presbyterian Hospital, New York, NY, USA
| | - L Mosca
- Preventive Cardiology Program, Columbia University Medical Center/New York-Presbyterian Hospital, New York, NY, USA.
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Dewell A, Weidner G, Sumner MD, Chi CS, Ornish D. A very-low-fat vegan diet increases intake of protective dietary factors and decreases intake of pathogenic dietary factors. ACTA ACUST UNITED AC 2008; 108:347-56. [PMID: 18237581 DOI: 10.1016/j.jada.2007.10.044] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Indexed: 11/30/2022]
Abstract
There is increasing evidence that dietary factors in plant-based diets are important in the prevention of chronic disease. This study examined protective (eg, antioxidant vitamins, carotenoids, and fiber) and pathogenic (eg, saturated fatty acids and cholesterol) dietary factors in a very-low-fat vegan diet. Ninety-three early-stage prostate cancer patients participated in a randomized controlled trial and were assigned to a very-low-fat (10% fat) vegan diet supplemented with soy protein and lifestyle changes or to usual care. Three-day food records were collected at baseline (n=42 intervention, n=43 control) and after 1 year (n=37 in each group). Analyses of changes in dietary intake of macronutrients, vitamins, minerals, carotenoids, and isoflavones from baseline to 1 year showed significantly increased intake of most protective dietary factors (eg, fiber increased from a mean of 31 to 59 g/day, lycopene increased from 8,693 to 34,464 mug/day) and significantly decreased intake of most pathogenic dietary factors (eg, saturated fatty acids decreased from 20 to 5 g/day, cholesterol decreased from 200 to 10 mg/day) in the intervention group compared to controls. These results suggest that a very-low-fat vegan diet can be useful in increasing intake of protective nutrients and phytochemicals and minimizing intake of dietary factors implicated in several chronic diseases.
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Affiliation(s)
- Antonella Dewell
- Stanford Prevention Research Center, Stanford University School of Medicine, Stanford, CA, USA
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Bauchart D, Roy A, Lorenz S, Chardigny JM, Ferlay A, Gruffat D, Sébédio JL, Chilliard Y, Durand D. Butters Varying in trans 18:1 and cis-9,trans-11 Conjugated Linoleic Acid Modify Plasma Lipoproteins in the Hypercholesterolemic Rabbit. Lipids 2007; 42:123-33. [PMID: 17393218 DOI: 10.1007/s11745-006-3018-0] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Accepted: 12/15/2006] [Indexed: 01/20/2023]
Abstract
The experiment was designed to study the effects of butters differing in conjugated linoleic acid (CLA) and trans 18:1 contents on lipoproteins associated with the risk of atherogenesis. New Zealand White male rabbits (9.6 weeks; 2.1 kg) were assigned for 6 or 12 weeks to three diets (n = 6 per diet) made of conventional pellets with 0.2% cholesterol and with 12% fat provided from a butter poor in trans-10 and trans-11 18:1 and in CLA (standard group), or rich in trans-10 18:1 (trans-10 18:1 group) or rich in trans-11 18:1 and in cis-9,trans-11 CLA (trans-11 18:1/CLA group). Blood samples were collected at the end of dietary treatments. Lipoproteins were separated by gradient-density ultracentrifugation. Lipid classes were determined enzymatically and apolipoproteins A-I and B by radial immunodiffusion. Mainly in the 12-week rabbits, higher plasma triglycerides and apolipoprotein B levels shown in the standard and trans-10 18:1 groups compared with those in the trans-11 18:1/CLA group are associated with higher plasma levels of very low density lipoproteins (VLDL) and low density lipoproteins (LDL) also shown in these two groups. In the 12-week rabbits, a shift towards denser LDL, considered as more atherogenic, was shown only in the trans-10 18:1 group. In these animals, the VLDL + LDL to HDL ratio was 1.7-2.3 times higher in the trans-10 18:1 group than in the other groups (P = 0.076). These results suggest a rather neutral effect of trans-11 18:1/CLA butter towards the risk of atherogenesis, whereas trans-10 18:1 butter would tend to be detrimental.
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Affiliation(s)
- Dominique Bauchart
- UR1213 Herbivores, Research Unit on Herbivores, Nutrients and Metabolisms Group, INRA, Site de Theix, Saint-Genès-Champanelle, France.
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KOGA T, GU JY, NONAKA M, SUGANO M. Elaidic Acid and Oleic Acid Have Opposite Effects on Serum Glucose, Insulin and Immunoglobulin Levels and Eicosanoid Production in Streptozotocin-Induced Diabetic Rats. J Oleo Sci 2006. [DOI: 10.5650/jos.55.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
Epistaxis is one of the commonest ENT emergencies. Although most patients can be treated within an accident and emergency setting, some are complex and may require specialist intervention. There are multiple risk factors for the development of epistaxis and it can affect any age group, but it is the elderly population with their associated morbidity who often require more intensive treatment and subsequent admission. Treatment strategies have been broadly similar for decades. However, with the evolution of endoscopic technology, new ways of actively managing epistaxis are now available. Recent evidence suggests that this, combined with the use of stepwise management plans, should limit patient complications and the need for admission. This review discusses the various treatment options and integrates the traditional methods with modern techniques.
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Affiliation(s)
- L E R Pope
- Department of Otolaryngology and Head and Neck Surgery, St Michael's Hospital, Bristol, UK
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Gruffat D, De La Torre A, Chardigny JM, Durand D, Loreau O, Bauchart D. Vaccenic acid metabolism in the liver of rat and bovine. Lipids 2005; 40:295-301. [PMID: 15957256 DOI: 10.1007/s11745-005-1385-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Hepatic metabolism of vaccenic acid (VA), especially its conversion into CLA, was studied in the bovine (ruminant species that synthesizes CLA) and in the rat (model for non-ruminant) by using the in vitro technique of liver explants. Liver tissue samples were collected from fed animals (5 male Wistar rats and 5 Charolais steers) and incubated at 37 degrees C for 17 h under an atmosphere of 95% O2/5% CO2 in medium supplemented with 0.75 mM of FA mixture and with 55 microM [1-14C]VA. VA uptake was about sixfold lower in bovine than in rat liver slices (P< 0.01). For both species, VA that was oxidized to partial oxidation products represented about 20% of VA incorporated by cells. The chemical structure of VA was not modified in bovine liver cells, whereas in rat liver cells, 3.2% of VA was converted into 16:0 and only 0.33% into CLA. The extent of esterification of VA was similar for both animal species (70-80% of incorporated VA). Secretion of VA as part of VLDL particles was very low and similar in rat and bovine liver (around 0.07% of incorporated VA). In conclusion, characteristics of the hepatic metabolism of VA were similar for rat and bovine animals, the liver not being involved in tissue VA conversion into CLA in spite of its high capacity for FA desaturation especially in the rat. This indicates that endogenous synthesis of CLA should take place exclusively in peripheral tissues.
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Affiliation(s)
- Dominique Gruffat
- Institut National de la Recherche Agronomique, Research Unit on Herbivores, Nutrients and Metabolisms Group, 63122 Saint Genès-Champanelle, France.
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Matthan NR, Welty FK, Barrett PHR, Harausz C, Dolnikowski GG, Parks JS, Eckel RH, Schaefer EJ, Lichtenstein AH. Dietary Hydrogenated Fat Increases High-Density Lipoprotein apoA-I Catabolism and Decreases Low-Density Lipoprotein apoB-100 Catabolism in Hypercholesterolemic Women. Arterioscler Thromb Vasc Biol 2004; 24:1092-7. [PMID: 15087307 DOI: 10.1161/01.atv.0000128410.23161.be] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To determine mechanisms contributing to decreased high-density lipoprotein cholesterol (HDL-C) and increased low-density lipoprotein cholesterol (LDL-C) concentrations associated with hydrogenated fat intake, kinetic studies of apoA-I, apoB-100, and apoB-48 were conducted using stable isotopes. METHODS AND RESULTS Eight postmenopausal hypercholesterolemic women were provided in random order with 3 diets for 5-week periods. Two-thirds of the fat was soybean oil (unsaturated fat), stick margarine (hydrogenated fat), or butter (saturated fat). Total and LDL-C levels were highest after the saturated diet (P<0.05; saturated versus unsaturated) whereas HDL-C levels were lowest after the hydrogenated diet (P<0.05; hydrogenated versus saturated). Plasma apoA-I levels and pool size (PS) were lower, whereas apoA-I fractional catabolic rate (FCR) was higher after the hydrogenated relative to the saturated diet (P<0.05). LDL apoB-100 levels and PS were significantly higher, whereas LDL apoB-100 FCR was lower with the saturated and hydrogenated relative to the unsaturated diet. There was no significant difference among diets in apoA-I or B-100 production rates or apoB-48 kinetic parameters. HDL-C concentrations were negatively associated with apoA-I FCR (r=-0.56, P=0.03) and LDL-C concentrations were negatively correlated with LDL apoB-100 FCR (r=-0.48, P=0.05). CONCLUSIONS The mechanism for the adverse lipoprotein profile observed with hydrogenated fat intake is determined in part by increased apoA-I and decreased LDL apoB-100 catabolism.
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Affiliation(s)
- Nirupa R Matthan
- Cardiovascular Nutrition Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, 711 Washington Street, Boston Mass 02111, USA.
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Mauger JF, Lichtenstein AH, Ausman LM, Jalbert SM, Jauhiainen M, Ehnholm C, Lamarche B. Effect of different forms of dietary hydrogenated fats on LDL particle size. Am J Clin Nutr 2003; 78:370-5. [PMID: 12936917 DOI: 10.1093/ajcn/78.3.370] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Dietary trans fatty acids (FAs), which are formed during the process of hydrogenating vegetable oil, are known to increase plasma LDL-cholesterol concentrations. However, their effect on LDL particle size has yet to be investigated. OBJECTIVE We investigated the effect of trans FA consumption on the electrophoretic characteristics of LDL particles. DESIGN Eighteen women and 18 men each consumed 5 experimental diets in random order for 35-d periods. Fat represented 30% of total energy intake in each diet, with two-thirds of the fat in the form of semiliquid margarine (0.6 g trans FAs/100 g fat), soft margarine (9.4 g trans FAs/100 g fat), shortening (13.6 g trans FAs/100 g fat), stick margarine (26.1 g trans FAs/100 g fat), or butter, which was low in trans FAs (2.6 g trans FAs/100 g fat) but rich in saturated fat. LDL particle size and distribution were characterized by nondenaturing, 2-16% polyacrylamide gradient gel electrophoresis. RESULTS Relative to the LDL particle size observed after consumption of the butter-enriched diet, LDL particle size decreased significantly and in a dose-dependent fashion with increasing amounts of dietary trans FAs (P < 0.001). Cholesterol concentrations in large (> 260 A) and medium-sized (255-260 A) LDL particles also increased proportionately to the amount of trans FAs in the diet. CONCLUSION Consumption of dietary trans FAs is associated with a deleterious increase in small, dense LDL, which further reinforces the importance of promoting diets low in trans FAs to favorably affect the lipoprotein profile.
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Affiliation(s)
- Jean-François Mauger
- Institute on Nutraceuticals and Functional Foods, Laval University, Quebec, Canada
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Buchgraber M, Ulberth F. Determination of low leveltrans unsaturation in physically refined vegetable oils by capillary GLC — Results of 3 intercomparison studies. EUR J LIPID SCI TECH 2002. [DOI: 10.1002/1438-9312(200212)104:12<792::aid-ejlt792>3.0.co;2-b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Dietary therapy is the cornerstone of lipid management in patients with type 2 diabetes mellitus. The key strategies are the reduction of intake of saturated fat, trans unsaturated fat and cholesterol, and the reduction of energy intake to promote weight loss. This approach will produce significant improvements in the serum levels of low-density lipoprotein (LDL) cholesterol, triglycerides, and high-density lipoprotein (HDL) cholesterol. According to both the American Diabetes Association and the National Cholesterol Education Program (NCEP), the primary target of therapy is the serum LDL cholesterol level, with the secondary targets being non-HDL cholesterol, triglycerides, and HDL cholesterol. The recently updated guidelines of the NCEP place new emphasis on increasing soluble fiber intake to 10 to 25 g/d and adding foods fortified with plant stanols/sterols (2 g/d) as options to enhance the LDL cholesterol-lowering effect of diet.
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Affiliation(s)
- Nilo B Cater
- Department of Internal Medicine, Center for Human Nutrition, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390-9052, USA
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Santos AA, Silva MV, Guerreiro LT, Alves MV, Cunha Bastos VL, Cunha Bastos J, Kovary K. Influence of norbixin on plasma cholesterol-associated lipoproteins, plasma arylesterase/paraoxonase activity and hepatic lipid peroxidation of Swiss mice on a high fat diet. Food Chem 2002. [DOI: 10.1016/s0308-8146(01)00363-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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BEARDSELL DAVID, FRANCIS JULIE, RIDLEY DAN, ROBARDS KEVIN. HEALTH PROMOTING CONSTITUENTS IN PLANT DERIVED EDIBLE OILS. ACTA ACUST UNITED AC 2002. [DOI: 10.1111/j.1745-4522.2002.tb00205.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Accumulating evidence suggests that oxidized fats and lipid oxidation products in the diet can contribute to the pathogenesis of atherosclerosis. The present review summarizes studies that show that oxidized fat and lipid oxidation products are present in human foods; that these compounds are absorbed by the intestine and appear in the blood circulation; and that these ingested substances can have deleterious cardiovascular effects in both humans and experimental animals. However, considerable additional research is required to establish the extent to which dietary fat oxidation poses a threat to human health and/or longevity.
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Affiliation(s)
- Jeffrey S Cohn
- Hyperlipidemia and Atherosclerosis Research Group, Clinical Research Institute of Montréal, Québec, Canada.
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Lombardi VR, Cagiao A, Fernández-Novoa L, Álvarez XA, Corzo MD, Zas R, Sampedro C, Cacabelos R. Short term food supplementation effects of a fish derived extract on the immunological status of pregnant rats and their sucking pups. Nutr Res 2001. [DOI: 10.1016/s0271-5317(01)00361-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Krishna UM, Reddy MM, Xia J, Falck JR, Balazy M. Stereospecific synthesis of trans-arachidonic acids. Bioorg Med Chem Lett 2001; 11:2415-8. [PMID: 11549436 DOI: 10.1016/s0960-894x(01)00442-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An effective synthesis is described for the preparation of all four mono trans isomers of arachidonic acid via deoxidation of epoxide precursors with lithium diphenylphosphide and quaternization with methyl iodide.
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Affiliation(s)
- U M Krishna
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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Misra A, Sharma R, Pandey RM, Khanna N. Adverse profile of dietary nutrients, anthropometry and lipids in urban slum dwellers of northern India. Eur J Clin Nutr 2001; 55:727-34. [PMID: 11528485 DOI: 10.1038/sj.ejcn.1601214] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2000] [Revised: 01/15/2001] [Accepted: 02/13/2001] [Indexed: 11/09/2022]
Abstract
OBJECTIVES The intra-country rural to urban migrant populations undergo radical socio-economic and lifestyle changes in a developing country. Therefore, it is an interesting sample in which to study nutrition pattern, anthropometry and metabolic profile. The aim of this study was to assess nutrient profile and its association with the anthropometry, percentage body fat (%BF) and blood lipids in the urban slum dwellers in northern India. DESIGN A cross sectional epidemiological descriptive study. SETTINGS The study was conducted in urban slum colony of Gautam Nagar, situated in a southern area of New Delhi. SUBJECTS The data was recorded in 227 subjects (52 males and 175 females). RESULTS The diets averaged approximately 59-60% of energy from carbohydrates, 12-13% energy from protein, and 24-27% energy from dietary total fat. Lower intake of monounsaturated fatty acids (MUFA), a low ratio of n-6/n-3 fatty acids, a high ratio of polyunsaturated and saturated fatty acids, a high intake of erucic acid, and a low consumption of fibre and vitamin E intake were significant observations. Although their mean body mass index (BMI) was in a low range (20.5+/-4.2), %BF was high in females (26.7+/-8.6%; P=0.001), and a high prevalence of abdominal obesity was observed in both males (22%) and females (16%). Moreover, there was high prevalence of hypercholesterolemia, hypertriglyceridemia and, in particular, low levels of high-density lipoprotein cholesterol. Those consuming a high-fat diet (>30%) also consumed high MUFA, n-3 fatty acids, saturated fat and dietary cholesterol. Carbohydrate intake as percentage energy was a significant predictor of the levels of triacylglycerol in males, while in females significant predictors for triacylglycerol include intake of carbohydrate as percentage energy, age, %BF and BMI. CONCLUSION In this economically deprived population, now constituting approximately 30-50% of the urban population of major cities in India, such adverse dietary, anthropometric and metabolic factors are predictors of early and accelerated atherosclerosis. SPONSORSHIP This study was fully supported by a financial grant from the Science and Society Division, Department of Science and Technology, Ministry of Science and Technology, Government of India.
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Affiliation(s)
- A Misra
- Department of Medicine, All India Institute of Medicine, New Delhi, India.
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Abstract
It has been suggested that the molecular species or structure of the triglyceride, i.e. not only what fatty acids are present but also their relative order in the sn1, 2, or 3 position on the triglyceride, can influence the metabolism of the triglyceride and its fatty acids, including lipoprotein metabolism. One rationale for this possibility assumes that the fatty acid in the sn2 position can be absorbed intact, i.e. as the sn2 monoglyceride, whereas the sn1,3 fatty acids are absorbed as free fatty acids that metabolize independently. Some sn2 monoglyceride might ultimately serve as the backbone for gut or liver phospholipids, exerting downstream influence on lipid metabolism. Experiments that test this hypothesis directly by feeding triglycerides with modified structure during carefully controlled fat intake are few, particularly in humans, but their results tend to support the paradigm.
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Affiliation(s)
- K C Hayes
- Foster Biomedical Research Laboratory, Brandeis University, Waltham, Massachusetts 02454, USA.
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