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Guo Y, Wang L, Hanson A, Urriola PE, Shurson GC, Chen C. Identification of Protective Amino Acid Metabolism Events in Nursery Pigs Fed Thermally Oxidized Corn Oil. Metabolites 2023; 13:metabo13010103. [PMID: 36677028 PMCID: PMC9866068 DOI: 10.3390/metabo13010103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/28/2022] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Feeding thermally oxidized lipids to pigs has been shown to compromise growth and health, reduce energy digestibility, and disrupt lipid metabolism. However, the effects of feeding oxidized lipids on amino acid metabolism in pigs have not been well defined even though amino acids are indispensable for the subsistence of energy metabolism, protein synthesis, the antioxidant system, and many other functions essential for pig growth and health. In this study, oxidized corn oil (OCO)-elicited changes in amino acid homeostasis of nursery pigs were examined by metabolomics-based biochemical analysis. The results showed that serum and hepatic free amino acids and metabolites, including tryptophan, threonine, alanine, glutamate, and glutathione, as well as associated metabolic pathways, were selectively altered by feeding OCO, and more importantly, many of these metabolic events possess protective functions. Specifically, OCO activated tryptophan-nicotinamide adenosine dinucleotide (NAD+) synthesis by the transcriptional upregulation of the kynurenine pathway in tryptophan catabolism and promoted adenine nucleotide biosynthesis. Feeding OCO induced oxidative stress, causing decreases in glutathione (GSH)/oxidized glutathione (GSSG) ratio, carnosine, and ascorbic acid in the liver but simultaneously promoted antioxidant responses as shown by the increases in hepatic GSH and GSSG as well as the transcriptional upregulation of GSH metabolism-related enzymes. Moreover, OCO reduced the catabolism of threonine to α-ketobutyrate in the liver by inhibiting the threonine dehydratase (TDH) route. Overall, these protective metabolic events indicate that below a certain threshold of OCO consumption, nursery pigs are capable of overcoming the oxidative stress and metabolic challenges posed by the consumption of oxidized lipids by adjusting antioxidant, nutrient, and energy metabolism, partially through the transcriptional regulation of amino acid metabolism.
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Affiliation(s)
- Yue Guo
- Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Ave., St. Paul, MN 55108, USA
| | - Lei Wang
- Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Ave., St. Paul, MN 55108, USA
| | - Andrea Hanson
- Department of Animal Science, University of Minnesota, 1364 Eckles Ave., St. Paul, MN 55108, USA
| | - Pedro E. Urriola
- Department of Animal Science, University of Minnesota, 1364 Eckles Ave., St. Paul, MN 55108, USA
| | - Gerald C. Shurson
- Department of Animal Science, University of Minnesota, 1364 Eckles Ave., St. Paul, MN 55108, USA
| | - Chi Chen
- Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Ave., St. Paul, MN 55108, USA
- Department of Animal Science, University of Minnesota, 1364 Eckles Ave., St. Paul, MN 55108, USA
- Correspondence: ; Tel.: +1-612-624-7704; Fax: +1-612-625-5272
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Cho HM, Macelline SP, Wickramasuriya SS, Shin TK, Kim E, Son HC, Heo JM. Moderate dietary boron supplementation improved growth performance, crude protein digestibility and diarrhea index in weaner pigs regardless to the sanitary condition. Anim Biosci 2021; 35:434-443. [PMID: 34293844 PMCID: PMC8902220 DOI: 10.5713/ab.21.0110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 06/14/2021] [Indexed: 11/30/2022] Open
Abstract
Objective The study was conducted to investigate the impact of boron supplementation on nutrient digestibility, inflammatory responses, blood metabolites and diarrhea index, and their relevance to growth performance in weaned pigs housed in good and poor sanitary environments for 14 days after weaning. Methods A total of 108 male pigs (Duroc×[Yorkshire×Landrace]) weaned at 21 days of age were used in a randomized complete block design with 2×3 factorial arrangement. Pigs were assigned to three boron treatments (0, 5, and 10 mg/kg) under two environments (good and poor sanitary) to give six replicates per treatment (3 pigs per replicate). On 0, 7, and 14 days, one pig per replicate was euthanized to collect, ileum tissue samples, and rectal fecal samples. Results Boron supplementation quadratically influenced (p<0.001) feed intake and weight gain in pigs housed in good sanitary conditions from 1 to 14 days post-weaning where pigs offered 5 mg/kg boron optimized weight gain and feed intake. There is a quadratic interaction (p = 0.019) on feed intake for 1 to 14 days post-weaning where 5 mg/kg boron increased feed intake in good sanitary conditions. Pigs housed in the poor sanitary environment decreased (p<0.001) villus height and crypt depth in ileum at days 7 and 14. On day 7 and 14, crude protein digestibility was quadratically influenced (p<0.05) by boron supplementation. Boron supplementation linearly increased (p<0.05) plasma calcium and cholesterol levels whilst linearly (p = 0.005) reducing plasma triglyceride concentrations. Diarrhea index was quadratically influenced (p<0.05) by boron supplementations regardless of sanitary conditions where 5 mg/kg boron inclusion achieved the lowest diarrhea index. Conclusion Pigs offered 5 mg/kg of boron increased weight gain which may be deduced by improved dry matter, crude protein, and energy digestibility regardless of the sanitary conditions.
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Affiliation(s)
- Hyun Min Cho
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea
| | - Shemil Priyan Macelline
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea.,Current affiliation: School of Life and Environmental Sciences. The University of Sydney, NSW 2006, Australia
| | | | - Taeg Kyun Shin
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea
| | - Eunjoo Kim
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea
| | - Hong Cheol Son
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea
| | - Jung Min Heo
- Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea
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Abstract
PURPOSE OF REVIEW The purpose of this review is to assess whether dietary fish oil supplements can be appropriate for patients with elevated triglycerides and cardiovascular risk based on a comprehensive analysis of their composition, and level of regulatory oversight. RECENT FINDINGS Approximately 19 million people in the United States take fish oil supplements, many for the purpose of treating or preventing heart disease. Unlike prescription products, fish oil supplements are classified as food by the Food and Drug Administration (FDA) and are not required to undergo manufacturing oversight or clinical testing. Analysis of widely used dietary fish oil supplements show that they may have lower amounts of ω-3 than advertised as well as significant levels of saturated fat and oxidized oils which actually may contribute to dyslipidemia. Clinical outcome trials have failed to show a consistent cardiovascular benefit with fish oil supplements and other low-dose mixed ω-3 fatty acids. SUMMARY In light of limited regulatory oversight and evidence of quality concerns, dietary fish oil supplements are not an appropriate substitute for FDA approved prescription ω-3 fatty acids for their indicated use in treatment of elevated triglycerides or the prevention of cardiovascular events.
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Affiliation(s)
| | - Michael Lero
- Elucida Research LLC, Beverly, MA, USA
- University of Massachusetts School of Medicine, Worcester, MA, USA
| | - R. Preston Mason
- Elucida Research LLC, Beverly, MA, USA
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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Guo Q, Li F, Wen C, Zhang L, Duan Y, Wang W, Huang R, Yin Y. The changes in growth performance and lipid metabolism of pigs with yellow fat induced by high dietary fish oil. CANADIAN JOURNAL OF ANIMAL SCIENCE 2020. [DOI: 10.1139/cjas-2019-0094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The aim of this study was to investigate the alteration in growth performance and lipid metabolism during the development of yellow fat in pigs. A total of 30 pigs (9.23 ± 0.21 kg) were assigned to three treatments: (1) low fish oil (LFO), basal diet + 2% fresh fish oil; (2) high fish oil (HFO), basal diet + 8% fresh fish oil; and (3) oxidized fish oil (OFO), basal diet + 8% OFO (peroxide value = 250 meqO2kg−1). Pigs fed HFO and OFO diets showed yellow staining of fat and decreased growth performance, including average daily gain, average daily feed intake, and final body weight (P < 0.01). The oxidized lipid markers malondialdehyde, yellowness b* of backfat, perirenal fat, and abdominal fat were markedly increased in the pigs fed with HFO and OFO (P < 0.05). Furthermore, following HFO feeding, pigs showed significant decreases in n-6 polyunsaturated fatty acid, n-6/n-3 polyunsaturated fatty acid ratio and mRNA expression levels of CCAAT-/enhancer-binding protein alpha, fatty acid synthase, lipoprotein lipase, and hormone-sensitive lipase in backfat (P < 0.01). Overall, pigs with yellow-fat trait showed decreased growth performance and altered lipid metabolism by the high fish oil feeding.
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Affiliation(s)
- Qiuping Guo
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science
- University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Fengna Li
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science
- Hunan Co-Innovation Center of Animal Production Safety, CICAPS; Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, Changsha, Hunan 410128, People’s Republic of China
| | - Chaoyue Wen
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, People’s Republic of China
| | - Lingyu Zhang
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science
- University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
| | - Yehui Duan
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science
| | - Wenlong Wang
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, People’s Republic of China
| | - Ruilin Huang
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science
- Hunan Co-Innovation Center of Animal Production Safety, CICAPS; Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, Changsha, Hunan 410128, People’s Republic of China
| | - Yulong Yin
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science
- Laboratory of Animal Nutrition and Human Health, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, People’s Republic of China
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Wang L, Yao D, Urriola PE, Hanson AR, Saqui-Salces M, Kerr BJ, Shurson GC, Chen C. Identification of activation of tryptophan-NAD + pathway as a prominent metabolic response to thermally oxidized oil through metabolomics-guided biochemical analysis. J Nutr Biochem 2018; 57:255-267. [PMID: 29800812 DOI: 10.1016/j.jnutbio.2018.04.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 04/13/2018] [Accepted: 04/17/2018] [Indexed: 02/08/2023]
Abstract
Consumption of thermally oxidized oil is associated with metabolic disorders, but oxidized oil-elicited changes in the metabolome are not well defined. In this study, C57BL/6 mice were fed the diets containing either control soybean oil or heated soybean oil (HSO) for 4 weeks. HSO-responsive metabolic events were examined through untargeted metabolomics-guided biochemical analysis. HSO directly contributed to the presence of new HSO-derived metabolites in urine and the decrease of polyunsaturated fatty acid-containing phospholipids in serum and the liver. HSO disrupted redox balance by decreasing hepatic glutathione and ascorbic acid. HSO also activated peroxisome proliferator-activated receptors, leading to the decrease of serum triacylglycerols and the changes of cofactors and products in fatty acid oxidation pathways. Most importantly, multiple metabolic changes, including the decrease of tryptophan in serum; the increase of NAD+ in the liver; the increases of kynurenic acid, nicotinamide and nicotinamide N-oxide in urine; and the decreases of the metabolites from pyridine nucleotide degradation in the liver indicated that HSO activated tryptophan-NAD+ metabolic pathway, which was further confirmed by the upregulation of gene expression in this pathway. Because NAD+ and its metabolites are essential cofactors in many HSO-induced metabolic events, the activation of tryptophan-NAD+ pathway should be considered as a central metabolic response to the exposure of HSO.
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Affiliation(s)
- Lei Wang
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA
| | - Dan Yao
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA
| | - Pedro E Urriola
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Andrea R Hanson
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Milena Saqui-Salces
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Brian J Kerr
- USDA-ARS-National Laboratory for Agriculture and the Environment, USDA, Ames, IA 50011, USA
| | - Gerald C Shurson
- Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA
| | - Chi Chen
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA; Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA.
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Hasanpour S, Salati AP, Falahatkar B, Azarm HM. Effects of dietary green tea (Camellia sinensis L.) supplementation on growth performance, lipid metabolism, and antioxidant status in a sturgeon hybrid of Sterlet (Huso huso ♂ × Acipenser ruthenus ♀) fed oxidized fish oil. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:1315-1323. [PMID: 28488192 DOI: 10.1007/s10695-017-0374-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 04/24/2017] [Indexed: 06/07/2023]
Abstract
Lipid content of diet is very susceptible to oxidation, especially when stored for a long time, so for evaluating protective effects of green tea in fish received oxidized oil, this study was done. Lipid content of diet was replaced by oxidized fish oil (OFO) in 0, 50, and 100%. Green tea extract (GTE) was added to diet in three levels, 0, 5, and 100 mg/kg giving a total of nine experimental diets. Two hundred and seventy sturgeon hybrid of Sterlet (Huso huso ♀ × Acipenser ruthenus ♂) with initial weight of 212.6 ± 0.7 g after 2 weeks adaptation randomly divided in 27 fiberglass tanks with 700 L volume. Fish were fed satiated three times daily. After 6 weeks, biometry was done to evaluate growth performance and blood samples were taken for biochemical analysis. The result showed that feeding with oxidized oil had no effects on growth. However, in fish fed GTE, growth indices improved slightly. Feeding with OFO reduced serum total cholesterol, triacylglycerol, and low-density lipoprotein, while increased high density lipoprotein. Dietary GTE moderated the effects of OFO on lipid metabolism. Feeding with the OFO increased activity of serum superoxide dismutase, catalase, glutathione peroxidase, and malondialdehyde contents. In fish received both OFO and GTE, reduced activity of serum antioxidant enzymes and malondialdehyde content was recorded in compare to fish fed only OFO. According to the result of the present study, it can be argued that feeding of sturgeon hybrid of Sterlet with OFO has negative effects on lipid metabolism and antioxidant status, whereas GTE dosages used in this study have protective effects on fish from the adverse effects of oxidized oil.
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Affiliation(s)
- Soleiman Hasanpour
- Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, PO Box: 699, Khorramshahr, Iran
| | - Amir Parviz Salati
- Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, PO Box: 699, Khorramshahr, Iran.
| | - Bahram Falahatkar
- Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Guilan, Iran
- Department of Marine Sciences, The Caspian Sea Basin Research Center, University of Guilan, Rasht, Guilan, Iran
| | - Hamid Mohammadi Azarm
- Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, PO Box: 699, Khorramshahr, Iran
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Shang W, Si X, Strappe P, Zhou Z, Blanchard C. Resistant starch attenuates impaired lipid biosynthesis induced by dietary oxidized oil via activation of insulin signaling pathways. RSC Adv 2017. [DOI: 10.1039/c7ra08855h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The current study found that deep-frying process led to an increased content of oxidized triacylglycerols in canola oil, 3.5 times higher than that of fresh canola oil (not used for frying).
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Affiliation(s)
- Wenting Shang
- Key Laboratory of Food Nutrition and Safety
- Ministry of Education
- School of Food Engineering and Biotechnology
- Tianjin University of Science and Technology
- Tianjin 300457
| | - Xu Si
- Key Laboratory of Food Nutrition and Safety
- Ministry of Education
- School of Food Engineering and Biotechnology
- Tianjin University of Science and Technology
- Tianjin 300457
| | - Padraig Strappe
- School of Medical and Applied Sciences
- Central Queensland University
- Rockhampton
- Australia
| | - Zhongkai Zhou
- Key Laboratory of Food Nutrition and Safety
- Ministry of Education
- School of Food Engineering and Biotechnology
- Tianjin University of Science and Technology
- Tianjin 300457
| | - Chris Blanchard
- ARC Industrial Transformation Training Centre for Functional Grains
- Charles Sturt University
- Wagga Wagga
- Australia
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Liu P, Chen C, Kerr BJ, Weber TE, Johnston LJ, Shurson GC. Influence of thermally oxidized vegetable oils and animal fats on growth performance, liver gene expression, and liver and serum cholesterol and triglycerides in young pigs1. J Anim Sci 2014; 92:2960-70. [DOI: 10.2527/jas.2012-5709] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- P. Liu
- University of Minnesota, St. Paul 55108
| | - C. Chen
- University of Minnesota, St. Paul 55108
| | - B. J. Kerr
- USDA-ARS-National Laboratory for Agriculture and the Environment, Ames, IA 50011
| | - T. E. Weber
- USDA-ARS-National Laboratory for Agriculture and the Environment, Ames, IA 50011
| | - L. J. Johnston
- West Central Research and Outreach Center, Morris, MN 56267
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Varady J, Ringseis R, Eder K. Dietary moderately oxidized oil induces expression of fibroblast growth factor 21 in the liver of pigs. Lipids Health Dis 2012; 11:34. [PMID: 22394566 PMCID: PMC3807756 DOI: 10.1186/1476-511x-11-34] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Accepted: 03/06/2012] [Indexed: 12/03/2022] Open
Abstract
Background Fibroblast growth factor 21 (FGF21), whose expression is induced by peroxisome proliferator-activated receptor α (PPARα), has been recently identified as a novel metabolic regulator which plays a crucial role in glucose homeostasis, lipid metabolism, insulin sensitivity and obesity. Previous studies have shown that administration of oxidized fats leads to an activation of PPARα in the liver. Therefore, the present study investigated the hypothesis that feeding of oxidized fats causes an induction of FGF21 in the liver. Methods Twenty four crossbred pigs were allocated to two groups of 12 pigs each and fed nutritionally adequate diets with either fresh rapeseed oil or oxidized rapeseed oil prepared by heating at a temperature of 175°C for 72 h. Results In pigs fed the oxidized fat mRNA abundance and protein concentrations of FGF21 in liver were significantly increased (P < 0.05), and the protein concentrations of FGF21 in plasma tended to be increased (P < 0.1) in comparison to control pigs. Moreover, pigs fed the oxidized fat had increased transcript levels of the PPARα target genes acyl-CoA oxidase, carnitine palmitoyltransferase-1 and novel organic cation transporter 2 in the liver (P < 0.05), indicative of PPARα activation. Conclusion The present study shows for the first time that administration of an oxidized fat induces the expression of FGF21 in the liver, probably mediated by activation of PPARα. Induction of FGF21 could be involved in several effects observed in animals administered an oxidized fat.
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Affiliation(s)
- Juliane Varady
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Giessen, Germany
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Varady J, Gessner DK, Most E, Eder K, Ringseis R. Dietary moderately oxidized oil activates the Nrf2 signaling pathway in the liver of pigs. Lipids Health Dis 2012; 11:31. [PMID: 22364167 PMCID: PMC3299602 DOI: 10.1186/1476-511x-11-31] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Accepted: 02/24/2012] [Indexed: 11/23/2022] Open
Abstract
Background Previous studies have shown that administration of oxidized oils increases gene expression and activities of various enzymes involved in xenobiotic metabolism and stress response in the liver of rats and guinea pigs. As these genes are controlled by nuclear factor erythroid-derived 2-like 2 (Nrf2), we investigated the hypothesis that feeding of oxidized fats causes an activation of that transcription factor in the liver which in turn activates the expression of antioxidant, cytoprotective and detoxifying genes. Methods Twenty four crossbred pigs were allocated to two groups of 12 pigs each and fed nutritionally adequate diets with either fresh rapeseed oil (fresh fat group) or oxidized rapeseed oil prepared by heating at a temperature of 175°C for 72 h (oxidized fat group). Results After 29 days of feeding, pigs of the oxidized fat group had a markedly increased nuclear concentration of the transcription factor Nrf2 and a higher activity of cellular superoxide dismutase and T4-UDP glucuronosyltransferase in liver than the fresh fat group (P < 0.05). In addition, transcript levels of antioxidant and phase II genes in liver, like superoxide dismutase 1, heme oxygenase 1, glutathione peroxidase 1, thioredoxin reductase 1, microsomal glutathione-S-transferase 1, UDP glucuronosyltransferase 1A1 and NAD(P)H:quinone oxidoreductase 1 in the liver were higher in the oxidized fat group than in the fresh fat group (P < 0.05). Moreover, pigs of the oxidized fat group had an increased hepatic nuclear concentration of the transcription factor NF-κB which is also an important transcription factor mediating cellular stress response. Conclusion The present study shows for the first time that administration of an oxidized fat activates the Nrf2 in the liver of pigs which likely reflects an adaptive mechanism to prevent cellular oxidative damage. Activation of the NF-κB pathway might also contribute to this effect of oxidized fat.
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Affiliation(s)
- Juliane Varady
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Giessen, Germany
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Açıkgöz Z, Bayraktar H, Altan O, Akhisaroglu ST, Kırkpınar F, Altun Z. The effects of moderately oxidised dietary oil with or without vitamin E supplementation on performance, nutrient digestibility, some blood traits, lipid peroxidation and antioxidant defence of male broilers. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:1277-1282. [PMID: 21337576 DOI: 10.1002/jsfa.4311] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 12/21/2010] [Accepted: 01/01/2011] [Indexed: 05/30/2023]
Abstract
BACKGROUND The experiment was conducted to determine the effects of dietary supplementation of oxidised oil with or without vitamin E on performance, nutrient digestibility, some blood traits, lipid peroxidation and antioxidant defence system of male broilers. RESULTS The supplementation of oxidised oil with or without vitamin E to the grower diets did not significantly affect performance, the pH and viscosity values of excreta and nutrient digestibilities in male broilers. Oxidised oil supplementation slightly increased plasma triglyceride and cholesterol concentrations but did not alter plasma glucose concentration. Although malondialdehyde (MDA) and nitric oxide concentrations tended to be higher in the oxidised oil group, these increases were not significant. Birds fed the diet containing oxidised oil had significantly lower superoxide dismutase (SOD) activity. However, no differences were observed in glutathione peroxidase (GSH-Px) activity and uric acid concentrations of broilers fed oxidised oil as compared to the control group. Dietary vitamin E supplementation decreased MDA concentration whereas increasing SOD activity, suggesting that vitamin E supplementation reduced susceptibility to lipid peroxidation. CONCLUSION The results showed that a milder oxidative stress occurred by supplementation of moderately oxidised oil to the diet of broilers and vitamin E supplementation had been helpful in alleviating lipid peroxidation.
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Affiliation(s)
- Zümrüt Açıkgöz
- Department of Animal Science, Faculty of Agriculture, Ege University, 35100 Bornova, Izmir, Turkey.
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12
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Regulation of genes involved in lipid metabolism by dietary oxidized fat. Mol Nutr Food Res 2010; 55:109-21. [DOI: 10.1002/mnfr.201000424] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 10/12/2010] [Accepted: 10/14/2010] [Indexed: 11/07/2022]
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Turner R, McLean CH, Silvers KM. Are the health benefits of fish oils limited by products of oxidation? Nutr Res Rev 2007; 19:53-62. [DOI: 10.1079/nrr2006117] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Human clinical trials have shown that fish oils reduce the risk of a variety of disorders including CVD. Despite this, results have been inconsistent. Fish oils are easily oxidised and some fish oils contain higher than recommended levels of oxidised products, but their effects have not been investigated. Recent evidence indicates that dietary oxidised fats can contribute to the development of atherosclerosis and thrombosis. This review summarises findings from cellular, animal and human trials that have examined the effects of oxidised lipids and their potential to affect health outcomes, and proposes that oxidised products in fish oils may attenuate their beneficial effects. More research is required to determine the magnitude of negative effects of fish oil on health outcomes in clinical trials.
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Koch A, König B, Spielmann J, Leitner A, Stangl GI, Eder K. Thermally oxidized oil increases the expression of insulin-induced genes and inhibits activation of sterol regulatory element-binding protein-2 in rat liver. J Nutr 2007; 137:2018-23. [PMID: 17709436 DOI: 10.1093/jn/137.9.2018] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Administration of oxidized oils to rats or pigs causes a reduction of their cholesterol concentrations in liver and plasma. The reason for this effect is unknown. We tested the hypothesis that oxidized oils lower cholesterol concentrations by inhibiting the proteolytic activation of sterol regulatory element-binding protein (SREBP)-2 in the liver and transcription of its target genes involved in cholesterol synthesis and uptake through an upregulation of gene expression of insulin-induced genes (Insig). For 6 d, 18 rats were orally administered either sunflower oil (control group) or an oxidized oil prepared by heating sunflower oil. Rats administered the oxidized oil had higher messenger RNA (mRNA) concentrations of acyl-CoA oxidase and cytochrome P450 4A1 in the liver than control rats (P < 0.05), indicative of activation of PPARalpha. Furthermore, rats administered the oxidized oil had higher mRNA concentrations of Insig-1 and Insig-2a, a lower concentration of the mature SREBP-2 in the nucleus, lower mRNA concentrations of the SREBP-2 target genes 3-hydroxy-3-methylglutaryl CoA reductase and LDL receptor in their livers, and a lower concentration of cholesterol in liver, plasma, VLDL, and HDL than control rats (P < 0.05). In conclusion, this study shows that reduced cholesterol concentrations in liver and plasma of rats administered an oxidized oil were due to an inhibition of the activation of SREBP-2 by an upregulation of Insig, which in turn inhibited transcription of proteins involved in hepatic cholesterol synthesis and uptake.
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Affiliation(s)
- Alexander Koch
- Institute of Agricultural and Nutritional Sciences, Martin Luther University, D-06108 Halle (Saale), Germany
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Effect of dietary fats on blood cholesterol and lipid and the development of atherosclerosis in rabbits. Nutr Res 2005. [DOI: 10.1016/j.nutres.2005.09.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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EL-SAYED FYKAEDRESS, ALLAM SAMAHSAIDMAHMOUD. THERMOXIDATIVE AND HYDROLYTIC CHANGES IN OILS USED FOR FRYING OF FROZEN PREFRIED FOODS. ACTA ACUST UNITED AC 2003. [DOI: 10.1111/j.1745-4522.2003.tb00022.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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Eder K, Keller U, Hirche F, Brandsch C. Thermally oxidized dietary fats increase the susceptibility of rat LDL to lipid peroxidation but not their uptake by macrophages. J Nutr 2003; 133:2830-7. [PMID: 12949373 DOI: 10.1093/jn/133.9.2830] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The aim of this study was to investigate the effect of dietary oxidized fats on the lipoprotein profile and the atherogenicity of LDL. Two experiments with male Sprague-Dawley rats were conducted. In Experiment 1, diets with either fresh fat or oxidized fat, prepared by heating at temperatures of 50, 105 or 190 degrees C, containing either 25 or 250 mg alpha-tocopherol equivalents/kg were used. In Experiment 2, diets with fresh or oxidized fat, heated at a temperature of 55 degrees C, containing 25 mg alpha-tocopherol equivalents/kg, were used. In Experiment 1, rats fed all types of oxidized fats had higher concentrations of HDL cholesterol and lower ratios between plasma and HDL cholesterol than rats fed the diet containing the fresh fat. As determined from the lag time, the susceptibility of LDL to copper-induced lipid peroxidation was higher in rats fed oxidized fats heated at 105 or 190 degrees C than in rats fed the diets containing the fresh fat or the oxidized fat treated at 50 degrees C, irrespective of the dietary vitamin E concentration. However, in Experiment 2, the composition of LDL apolipoproteins and uptake of LDL by macrophages were not different between rats fed the fresh fat diet and those fed the oxidized fat diet. We conclude that ingestion of oxidized fats does not adversely affect the lipoprotein profile in the rat model used, and does not cause modifications of apolipoproteins that would lead to enhanced uptake of LDL via macrophage scavenger receptors.
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Affiliation(s)
- Klaus Eder
- Institute of Nutritional Sciences, Martin-Luther-University of Halle-Wittenberg, Emil-Abderhalden-Strassse 26, D-06108 Halle/Saale, Germany.
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Abstract
PURPOSE OF REVIEW Lipid oxidation is the cause of important deteriorative changes in chemical, sensory and nutritional food properties. In particular, the question of whether oxidized fats in the diet may be detrimental to health is nowadays of the upmost concern, but finding an answer is not easy and requires careful consideration of different aspects of lipid oxidation. RECENT FINDINGS In this review, the most recent works on the formation, nature and evaluation of oxidized dietary lipids are addressed; important issues such as the difficulties encountered in estimating their intake and the relationships between oxidants and antioxidants in the diet are discussed, and the latest studies on health implications of oxidized lipids are summarized. SUMMARY The current literature reflects various important points. At present, there is no information on the intake of oxidized fats, which is essential to know if the amount of oxidized lipids in normal diets is sufficient to cause the physiological effects claimed. Recently, relevant advances in analytical methodologies for quantitation of specific oxidation compounds have been reported, although their application to improve the analytical definition of the oxidized substrate used in nutritional studies is still a goal to be reached. Alternatively, one of the most promising current tendencies in this field is the study of the molecular targets by which dietary oxidized lipids can influence health. Overall, more selected research based on coordinated multidisciplinary studies is needed to define the role of dietary oxidized fats in health.
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Eder K, Skufca P, Brandsch C. Thermally oxidized dietary fats increase plasma thyroxine concentrations in rats irrespective of the vitamin E and selenium supply. J Nutr 2002; 132:1275-81. [PMID: 12042446 DOI: 10.1093/jn/132.6.1275] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A recent study demonstrated that feeding a diet with a thermally oxidized fat increases the concentration of thyroxine in plasma of miniature pigs. This study was undertaken to investigate whether the effect of thermally oxidized fats on plasma thyroid hormones is influenced by the supply of vitamin E or selenium. Two experiments were conducted using male Sprague-Dawley rats. The first experiment included eight groups of rats fed diets with either fresh fat or three different types of oxidized fat prepared by heating at 50 degrees C, 105 degrees C or 190 degrees C for 42 d. The diets contained either 25 or 250 mg alpha-tocopherol equivalents per kg. The second experiment included four groups of rats fed diets with fresh fat or oxidized fat heated at 55 degrees C, containing either 70 or 570 microg selenium per kg for 56 d. Rats fed all types of oxidized fats had higher concentrations of free and total thyroxine in plasma than rats fed the equivalent diets with fresh oil; the concentrations of triiodothyronine and thyroid-stimulating hormone did not differ between rats fed fresh and those fed oxidized fats. The effect of the oxidized fat on the plasma thyroxine concentration was completely independent of the supply of vitamin E (expt. 1) and the supply of selenium (expt. 2). Our results confirm that oxidized dietary fats raise the plasma thyroxine concentration and show that this phenomenon is independent of the vitamin E and selenium status.
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Affiliation(s)
- Klaus Eder
- Institut für Ernährungswissenschaften, Martin Luther Universität Halle-Wittenberg, D-06108 Halle/Saale, Germany.
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DANA D, SAGUY IS. Frying of Nutritious Foods: Obstacles and Feasibility. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2001. [DOI: 10.3136/fstr.7.265] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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