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A Mix of Natural Bioactive Compounds Reduces Fat Accumulation and Modulates Gene Expression in the Adipose Tissue of Obese Rats Fed a Cafeteria Diet. Nutrients 2020; 12:nu12113251. [PMID: 33114190 PMCID: PMC7690777 DOI: 10.3390/nu12113251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/21/2020] [Accepted: 10/20/2020] [Indexed: 12/02/2022] Open
Abstract
Scientists are focusing on bioactive ingredients to counteract obesity. We evaluated whether a mix containing grape seed proanthocyanidin extract (GSPE), anthocyanins, conjugated linoleic acid (CLA), and chicken feet hydrolysate (CFH) could reduce body fat mass and also determined which mechanisms in the white adipose tissue (WAT) and the brown adipose tissue (BAT) were affected by the treatment. The mix or vehicle (VH) were administered for three weeks to obese rats fed a cafeteria (CAF) diet. Biometric measures, indirect calorimetry, and gene expression in WAT and BAT were analyzed as was the histology of the inguinal WAT (IWAT). The individual compounds were also tested in the 3T3-L1 cell line. The mix treatment resulted in a significant 15% reduction in fat (25.01 ± 0.91 g) compared to VH treatment (21.19 ± 1.59 g), and the calorimetry results indicated a significant increase in energy expenditure and fat oxidation. We observed a significant downregulation of Fasn mRNA and an upregulation of Atgl and Hsl mRNA in adipose depots in the group treated with the mix. The IWAT showed a tendency of reduction in the number of adipocytes, although no differences in the total adipocyte area were found. GSPE and anthocyanins modulated the lipid content and downregulated the gene and protein levels of Fasn compared to the untreated group in 3T3-L1 cells. In conclusion, this mix is a promising treatment against obesity, reducing the WAT of obese rats fed a CAF diet, increasing energy expenditure and fat oxidation, and modifying the expression of genes involved in lipid metabolism of the adipose tissue.
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Chen XY, Liao DC, Yu YT, Wei CM, Xuan LY, Li S, Wang HB. Coix seed oil prolongs lifespan and enhances stress resistance in Caenorhabditis elegans. Biogerontology 2020; 21:245-256. [PMID: 31960183 DOI: 10.1007/s10522-020-09857-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 01/10/2020] [Indexed: 12/13/2022]
Abstract
Coix seed oil (CSO) has many beneficial effects, but there is limited research on its influence on the processes and mechanisms related to senescence. Here, we used Caenorhabditis elegans as an in vivo model to investigate CSO's bioeffects on longevity. CSO (1 mg/mL) significantly extended the mean lifespan of C. elegans by over 22.79% and markedly improved stress resistance. Gene-specific mutant studies showed that the CSO-mediated increase in life expectancy was dependent on mev-1, hsf-1 and daf-16, but not daf-2. Furthermore, CSO significantly upregulated stress-inducible genes, including daf-16 and its downstream genes (sod-3, hsp-16.2 and gst-4). In addition, four major fatty acids, linoleic, oleic, palmitic and stearic, played leading roles in C. elegans' extended lifespan. Thus, CSO increased the life expectancy of, and enhanced the stress resistance in, C. elegans mainly through daf-16 and its downstream genes, but not through the insulin/insulin-like growth factor 1 signaling pathway.
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Affiliation(s)
- Xin-Yan Chen
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - De-Chun Liao
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Ying-Ting Yu
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Cong-Min Wei
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Ling-Yan Xuan
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Shan Li
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
| | - Hong-Bing Wang
- Putuo District People's Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
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Sun Z, Yang X, Liu QS, Li C, Zhou Q, Fiedler H, Liao C, Zhang J, Jiang G. Butylated hydroxyanisole isomers induce distinct adipogenesis in 3T3-L1 cells. JOURNAL OF HAZARDOUS MATERIALS 2019; 379:120794. [PMID: 31238218 DOI: 10.1016/j.jhazmat.2019.120794] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 06/15/2019] [Accepted: 06/18/2019] [Indexed: 06/09/2023]
Abstract
Butylated hydroxyanisole (BHA) isomers, as the widely used anthropogenic antioxidants in food, have been revealed to induce endocrine disrupting effects, while the mechanism how BHA isomers regulate the lipogenic differentiation remains to be elucidated. Using 3T3-L1 differentiation model, the effects of BHA isomers, including 2-tert-butyl-4-hydroxyanisole (2-BHA), 3-tert-butyl-4-hydroxyanisole (3-BHA) and their mixture (BHA), on adipogenesis were tested. The results showed that 3-BHA and BHA promoted adipocyte differentiation and enhanced the cellular lipid accumulation through the regulation of the transcriptional and protein levels of the adipogenetic biomarkers, while 2-BHA had no effect. The effective window for 3-BHA induced lipogenesis was the first four days during 3T3-L1 differentiation. BHA isomers showed no binding affinities for peroxisome proliferator activated receptor γ (PPARγ). Instead, the upstream of PPARγ signaling pathway, i.e. the phosphorylation of cAMP-response element binding protein (CREB), upregulation of CAAT/enhancer-binding proteins β (C/EBPβ) and elevated cell proliferation during postconfluent mitosis stage were induced by 3-BHA exposure. Altogether, this study revealed the adipogenic effect of 3-BHA through interference with the upstream events of the PPARγ signaling pathway. The authorized usage of BHA as food additives and its occurrence in human sera can potentially contribute to the incidence of obesity, which is of high concern.
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Affiliation(s)
- Zhendong Sun
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoxi Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian S Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuanhai Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qunfang Zhou
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Environment and Health, Jianghan University, Wuhan 430056, China.
| | - Heidelore Fiedler
- Örebro University, School of Science and Technology, MTM Research Centre, SE-701 82 Örebro, Sweden; UN Environment (UNEP), Chemicals Branch, CH-1219 Châtelaine GE, Switzerland
| | - Chunyang Liao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianqing Zhang
- Department of POPs Lab, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
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Nihei N, Okamoto H, Furune T, Ikuta N, Sasaki K, Rimbach G, Yoshikawa Y, Terao K. Dietary α-cyclodextrin modifies gut microbiota and reduces fat accumulation in high-fat-diet-fed obese mice. Biofactors 2018; 44:336-347. [PMID: 29733482 DOI: 10.1002/biof.1429] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 04/02/2018] [Accepted: 04/05/2018] [Indexed: 12/19/2022]
Abstract
We investigated the effect of α-cyclodextrin (α-CD) on the bacterial populations of gut microbiota, production of organic acids, and short-chain fatty acids (SCFAs), and lipid metabolism in obese mice induced by feeding a high-fat diet (HFD). Male C57BL/6J mice were assigned to three diet groups: normal diet (ND) (5% [w/w] fat), HFD (35% [w/w] fat), and HFD (35% [w/w] fat) + 5.5% (w/w) α-CD for 16 weeks. Increases in body and epididymal adipose tissue weights were observed in the HFD group compared with the ND group, which were attenuated in the HFD+α-CD group. The supplementation of α-CD increased the total number of bacteria, Bacteroides, Bifidobacterium, and Lactobacillus that were decreased in gut microbiota of mice by feeding the HFD. Importantly, α-CD administration increased the concentrations of lactic acid and SCFAs, such as acetic, propionic, and butyric acids, and decreased glucose concentrations in cecal contents. Furthermore, supplementation of α-CD upregulated the gene expression of peroxisome proliferator-activated receptor (PPAR)γ involved in adipocyte differentiation and PPARα involved in energy expenditure and downregulated that of sterol regulatory element-binding protein-1c (SREBP-1c) and fatty acid synthase involved in fatty acid and triglyceride synthesis in adipose tissue. This study revealed that the alteration in gut microbiota and increased production of lactic acid and SCFAs by supplementation of α-CD have beneficial antiobesity effects via modulating the expression of genes related to lipid metabolism, indicating a prebiotic property of α-CD. © 2018 BioFactors, 2018.
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Affiliation(s)
- Nanako Nihei
- CycloChem Bio Co., Ltd, Chuo-ku, Kobe, Hyogo, Japan
| | - Hinako Okamoto
- CycloChem Bio Co., Ltd, Chuo-ku, Kobe, Hyogo, Japan
- Division of Food and Drug Evaluation Science, Graduate School of Medicine, Kobe University, Chuo-ku, Kobe, Hyogo, Japan
| | | | - Naoko Ikuta
- Division of Food and Drug Evaluation Science, Graduate School of Medicine, Kobe University, Chuo-ku, Kobe, Hyogo, Japan
| | - Kengo Sasaki
- Graduate School of Science, Technology and Innovation, Kobe University, Nada-ku, Kobe, Hyogo, Japan
| | - Gerald Rimbach
- Division of Food Science, Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany
| | - Yutaka Yoshikawa
- Department of Health, Sports, and Nutrition, Faculty of Health and Welfare, Kobe Women's University, Chuo-ku, Kobe, Hyogo, Japan
| | - Keiji Terao
- CycloChem Bio Co., Ltd, Chuo-ku, Kobe, Hyogo, Japan
- Division of Food and Drug Evaluation Science, Graduate School of Medicine, Kobe University, Chuo-ku, Kobe, Hyogo, Japan
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Garibay-Nieto N, Queipo-García G, Alvarez F, Bustos M, Villanueva E, Ramírez F, León M, Laresgoiti-Servitje E, Duggirala R, Macías T, Cuevas S, Jalife A, Fonseca-Sánchez M, Serratos F, López-Alvarenga JC. Effects of Conjugated Linoleic Acid and Metformin on Insulin Sensitivity in Obese Children: Randomized Clinical Trial. J Clin Endocrinol Metab 2017; 102:132-140. [PMID: 27778642 DOI: 10.1210/jc.2016-2701] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 10/21/2016] [Indexed: 11/19/2022]
Abstract
CONTEXT Insulin resistance precedes metabolic syndrome abnormalities and may promote cardiovascular disease and type 2 diabetes in children with obesity. Results of lifestyle modification programs have been discouraging, and the use of adjuvant strategies has been necessary. OBJECTIVE This study aimed to evaluate the effects of metformin and conjugated linoleic acid (CLA) on insulin sensitivity, measured via euglycemic-hyperinsulinemic clamp technique and insulin pathway expression molecules in muscle biopsies of children with obesity. DESIGN A randomized, double-blinded, placebo-controlled clinical trial was conducted. SETTING Children with obesity were randomly assigned to receive metformin, CLA, or placebo. RESULTS Intervention had a positive effect in all groups. For insulin sensitivity Rd value (mg/kg/min), there was a statistically significant difference between the CLA vs placebo (6.53 ± 2.54 vs 5.05 ± 1.46, P = 0.035). Insulinemia and homeostatic model assessment of insulin resistance significantly improved in the CLA group (P = 0.045). After analysis of covariance was performed and the influence of body mass index, age, Tanner stage, prescribed diet, and fitness achievement was controlled, a clinically relevant effect size on insulin sensitivity remained evident in the CLA group (37%) and exceeded lifestyle program benefits. Moreover, upregulated expression of the insulin receptor substrate 2 was evident in muscle biopsies of the CLA group. CONCLUSIONS Improvement of insulin sensitivity, measured via euglycemic-hyperinsulinemic clamp and IRS2 upregulation, favored patients treated with CLA.
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Affiliation(s)
- Nayely Garibay-Nieto
- Children and Adolescent Obesity Clinic
- Department of Human Genetics, Hospital General de México Eduardo Liceaga-Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico
| | - Gloria Queipo-García
- Department of Human Genetics, Hospital General de México Eduardo Liceaga-Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico
| | | | | | | | - Fernando Ramírez
- Specialized Center for Diabetes Control, Public Health Services, Mexico City, Mexico 11340
| | | | | | - Ravindranath Duggirala
- School of Medicine, South Texas Diabetes and Obesity Institute, University of Texas Rio Grande Valley, Edinburg, Texas 78539
| | - Teresa Macías
- Department of Human Genetics, Hospital General de México Eduardo Liceaga-Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico
| | - Sergio Cuevas
- Department of Human Genetics, Hospital General de México Eduardo Liceaga-Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico
| | - Abel Jalife
- Department of Surgery, Hospital General de México Eduardo Liceaga, 06726 Mexico City, Mexico
| | - Miguel Fonseca-Sánchez
- Department of Human Genetics, Hospital General de México Eduardo Liceaga-Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico
| | | | - Juan Carlos López-Alvarenga
- School of Medicine, South Texas Diabetes and Obesity Institute, University of Texas Rio Grande Valley, Edinburg, Texas 78539
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Vahmani P, Meadus WJ, Rolland DC, Duff P, Dugan MER. Trans10,cis15 18:2 Isolated from Beef Fat Does Not Have the Same Anti-Adipogenic Properties as Trans10,cis12–18:2 in 3T3-L1 Adipocytes. Lipids 2016; 51:1231-1239. [DOI: 10.1007/s11745-016-4192-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 08/22/2016] [Indexed: 10/21/2022]
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Martins SV, Pires VMR, Madeira AP, Nascimento M, Alfaia CM, Castro MF, Soveral G, Prates JA, Lopes PA. Novel anti-adipogenic properties of the individualtrans8,cis10 conjugated linoleic acid (CLA) isomer in 3T3-L1 adipocytes. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201600042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Susana V. Martins
- Faculdade de Medicina Veterinária; CIISA; Universidade de Lisboa; Av. da Universidade Técnica; Pólo Universitário do Alto da Ajuda; Lisboa Portugal
| | - Virgínia M. R. Pires
- Faculdade de Medicina Veterinária; CIISA; Universidade de Lisboa; Av. da Universidade Técnica; Pólo Universitário do Alto da Ajuda; Lisboa Portugal
| | - Ana P. Madeira
- Faculdade de Farmácia; Research Institute for Medicines (iMed.UL); Universidade de Lisboa; Lisboa Portugal
| | - Mafalda Nascimento
- Faculdade de Medicina Veterinária; CIISA; Universidade de Lisboa; Av. da Universidade Técnica; Pólo Universitário do Alto da Ajuda; Lisboa Portugal
| | - Cristina M. Alfaia
- Faculdade de Medicina Veterinária; CIISA; Universidade de Lisboa; Av. da Universidade Técnica; Pólo Universitário do Alto da Ajuda; Lisboa Portugal
| | - Matilde F. Castro
- Faculdade de Farmácia; Research Institute for Medicines (iMed.UL); Universidade de Lisboa; Lisboa Portugal
| | - Graça Soveral
- Faculdade de Farmácia; Research Institute for Medicines (iMed.UL); Universidade de Lisboa; Lisboa Portugal
- Faculdade de Farmácia; Dep. Bioquímica e Biologia Humana; Universidade de Lisboa; Lisboa Portugal
| | - José A.M. Prates
- Faculdade de Medicina Veterinária; CIISA; Universidade de Lisboa; Av. da Universidade Técnica; Pólo Universitário do Alto da Ajuda; Lisboa Portugal
| | - Paula A. Lopes
- Faculdade de Medicina Veterinária; CIISA; Universidade de Lisboa; Av. da Universidade Técnica; Pólo Universitário do Alto da Ajuda; Lisboa Portugal
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Yeganeh A, Taylor CG, Tworek L, Poole J, Zahradka P. Trans-10,cis-12 conjugated linoleic acid (CLA) interferes with lipid droplet accumulation during 3T3-L1 preadipocyte differentiation. Int J Biochem Cell Biol 2016; 76:39-50. [PMID: 27131602 DOI: 10.1016/j.biocel.2016.04.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 04/14/2016] [Accepted: 04/25/2016] [Indexed: 12/22/2022]
Abstract
In this study, we hypothesize that the biologically active isomers of conjugated linoleic acid (CLA), cis-9,trans-11 (c9,t11) and trans-10,cis-12 (t10,c12) CLA, have different effects on early and late stages 3T3-L1 preadipocyte differentiation. Both c9-t11 and t10-c12CLA stimulated early stage pre-adipocyte differentiation (day 2), while t10-c12CLA inhibited late differentiation (day 8) as determined by lipid droplet numbers and both perilipin-1 levels and phosphorylation state. At day 8, the adipokines adiponectin, chemerin and adipsin were all reduced in t10-c12CLA treated cells versus control cells. Immunofluorescence microscopy showed perilipin-1 was present solely on lipid droplets on day 8 in t10-c12 treated 3T3-L1 cells, whereas preilipin-1 was also located in the perinuclear region in control and c9-t11 treated cells. The t10-c12CLA isomer also decreased levels of hormone-sensitive lipase and inhibited lipolysis. These findings indicate that the decrease in lipid droplets caused by t10-c12CLA is the result of an inhibition of lipid droplet production during adipogenesis rather than a stimulation of lipolysis. Additionally, treatment with Gö6976 blocked the effect of t10-c12CLA on perilipin-1 phosphorylation, implicating PKCα in perilipin-1 phosphorylation, and thus a regulator of triglyceride catabolism. These data are supported by evidence that t10-c12CLA activated PKCα. These are the first data to show that CLA isomers can affect lipid droplet dynamics in adipocytes through PKCα.
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Affiliation(s)
- Azadeh Yeganeh
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Canada
| | - Carla G Taylor
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, Canada; Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Canada
| | - Leslee Tworek
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Canada
| | - Jenna Poole
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Canada
| | - Peter Zahradka
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, Canada; Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, Canada; Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Canada.
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Da Silva MS, Rudkowska I. Dairy nutrients and their effect on inflammatory profile in molecular studies. Mol Nutr Food Res 2015; 59:1249-63. [DOI: 10.1002/mnfr.201400569] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/23/2014] [Accepted: 12/29/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Marine S. Da Silva
- Department of Endocrinology and Nephrology; CHU de Québec Research Center; Quebec QC Canada
| | - Iwona Rudkowska
- Department of Endocrinology and Nephrology; CHU de Québec Research Center; Quebec QC Canada
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Scientific Opinion on the substantiation of a health claim related to an equimolar mixture of the CLA isomers c9,t11 and t10,c12 (marketed as Clarinol® and Tonalin®) and “contributes to a reduction in body fat mass” pursuant to Article 13(5) of Regulation. EFSA J 2015. [DOI: 10.2903/j.efsa.2015.3953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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11
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Niezgoda N, Wawrzeńczyk C. An efficient method for enzymatic purification of cis-9,trans-11 isomer of conjugated linoleic acid. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.11.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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den Hartigh LJ, Han CY, Wang S, Omer M, Chait A. 10E,12Z-conjugated linoleic acid impairs adipocyte triglyceride storage by enhancing fatty acid oxidation, lipolysis, and mitochondrial reactive oxygen species. J Lipid Res 2013; 54:2964-78. [PMID: 23956445 DOI: 10.1194/jlr.m035188] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Conjugated linoleic acid (CLA) is a naturally occurring dietary trans fatty acid found in food from ruminant sources. One specific CLA isomer, 10E,12Z-CLA, has been associated with health benefits, such as reduced adiposity, while simultaneously promoting deleterious effects, such as systemic inflammation, insulin resistance, and dyslipidemia. The precise mechanisms by which 10E,12Z-CLA exerts these effects remain unknown. Despite potential health consequences, CLA continues to be advertised as a natural weight loss supplement, warranting further studies on its effects on lipid metabolism. We hypothesized that 10E,12Z-CLA impairs lipid storage in adipose tissue by altering the lipid metabolism of white adipocytes. We demonstrate that 10E,12Z-CLA reduced triglyceride storage due to enhanced fatty acid oxidation and lipolysis, coupled with diminished glucose uptake and utilization in cultured adipocytes. This switch to lipid utilization was accompanied by a potent proinflammatory response, including the generation of cytokines, monocyte chemotactic factors, and mitochondrial superoxide. Disrupting fatty acid oxidation restored glucose utilization and attenuated the inflammatory response to 10E,12Z-CLA, suggesting that fatty acid oxidation is critical in promoting this phenotype. With further investigation into the biochemical pathways involved in adipocyte responses to 10E,12Z-CLA, we can discern more information about its safety and efficacy in promoting weight loss.
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Affiliation(s)
- Laura J den Hartigh
- Diabetes Obesity Center for Excellence and the Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington, Seattle, WA 98109
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14
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Current issues surrounding the definition of trans-fatty acids: implications for health, industry and food labels. Br J Nutr 2013; 110:1369-83. [PMID: 23597388 DOI: 10.1017/s0007114513001086] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The definition of trans-fatty acids (TFA) was established by the Codex Alimentarius to guide nutritional and legislative regulations to reduce TFA consumption. Currently, conjugated linoleic acid (CLA) is excluded from the TFA definition based on evidence (primarily preclinical studies) implying health benefits on weight management and cancer prevention. While the efficacy of CLA supplements remains inconsistent in randomised clinical trials, evidence has emerged to associate supplemental CLA with negative health outcomes, including increased subclinical inflammation and oxidative stress (particularly at high doses). This has resulted in concerns regarding the correctness of excluding CLA from the TFA definition. Here we review recent clinical and preclinical literature on health implications of CLA and ruminant TFA, and highlight several issues surrounding the current Codex definition of TFA and how it may influence interpretation for public health. We find that CLA derived from ruminant foods differ from commercial CLA supplements in their isomer composition/distribution, consumption level and bioactivity. We conclude that health concerns associated with the use of supplemental CLA do not repudiate the exclusion of all forms of CLA from the Codex TFA definition, particularly when using the definition for food-related purposes. Given the emerging differential bioactivity of TFA from industrial v. ruminant sources, we advocate that regional nutrition guidelines/policies should focus on eliminating industrial forms of trans-fat from processed foods as opposed to all TFA per se.
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Basak S, Duttaroy AK. cis-9,trans-11 conjugated linoleic acid stimulates expression of angiopoietin like-4 in the placental extravillous trophoblast cells. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1831:834-43. [DOI: 10.1016/j.bbalip.2013.01.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Revised: 01/08/2013] [Accepted: 01/11/2013] [Indexed: 12/11/2022]
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16
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Choi SH, Chung KY, Johnson BJ, Go GW, Kim KH, Choi CW, Smith SB. Co-culture of bovine muscle satellite cells with preadipocytes increases PPARγ and C/EBPβ gene expression in differentiated myoblasts and increases GPR43 gene expression in adipocytes. J Nutr Biochem 2013; 24:539-43. [DOI: 10.1016/j.jnutbio.2012.01.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 12/14/2011] [Accepted: 01/26/2012] [Indexed: 12/01/2022]
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Martorell P, Llopis S, González N, Montón F, Ortiz P, Genovés S, Ramón D. Caenorhabditis elegans as a model to study the effectiveness and metabolic targets of dietary supplements used for obesity treatment: the specific case of a conjugated linoleic acid mixture (Tonalin). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:11071-11079. [PMID: 23072574 DOI: 10.1021/jf3031138] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The antiobesity effect of conjugated linoleic acid (CLA) has previously been described in different animal models. The aim of the present study was to investigate the effect of a commercial mixture (Tonalin) on Caenorhabditis elegans to assess their potential use for functional ingredient screenings. Body-fat reduction with Tonalin was demonstrated in wild-type strain N2. The 1 μg/mL dose was the most effective, either alone or added to a food matrix, and also significantly decreased triglyceride content in nematodes fed on the CLA mixture. Furthermore, the antiobesity effect was related to the CLA isomer trans-10, cis-12. Finally, the transcriptional study showed C. elegans fed with Tonalin (1 μg/mL) underwent an upregulation of energy metabolism, reproduction, protein metabolism and oxidative stress processes. In conclusion, the results presented here clearly correlate well with other animal studies, demonstrating the value of C. elegans as a useful model to evaluate antiobesity compounds/ingredients.
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Affiliation(s)
- Patricia Martorell
- Cell Biology Laboratory, Food Biotechnology Department, Biópolis SL, Paterna, Valencia, 46980, Spain
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Vaughan RA, Garcia-Smith R, Bisoffi M, Conn CA, Trujillo KA. Conjugated linoleic acid or omega 3 fatty acids increase mitochondrial biosynthesis and metabolism in skeletal muscle cells. Lipids Health Dis 2012; 11:142. [PMID: 23107305 PMCID: PMC3515476 DOI: 10.1186/1476-511x-11-142] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 10/09/2012] [Indexed: 11/21/2022] Open
Abstract
Background Polyunsaturated fatty acids are popular dietary supplements advertised to contribute to weight loss by increasing fat metabolism in liver, but the effects on overall muscle metabolism are less established. We evaluated the effects of conjugated linoleic acid (CLA) or combination omega 3 on metabolic characteristics in muscle cells. Methods Human rhabdomyosarcoma cells were treated with either DMSO control, or CLA or combination omega 3 for 24 or 48 hours. RNA was determined using quantitative reverse transcriptase polymerase chain reaction (qRT-PCR). Mitochondrial content was determined using flow cytometry and immunohistochemistry. Metabolism was quantified by measuring extracellular acidification and oxygen consumption rates. Results Omega 3 significantly induced metabolic genes as well as oxidative metabolism (oxygen consumption), glycolytic capacity (extracellular acidification), and metabolic rate compared with control. Both treatments significantly increased mitochondrial content. Conclusion Omega 3 fatty acids appear to enhance glycolytic, oxidative, and total metabolism. Moreover, both omega 3 and CLA treatment significantly increase mitochondrial content compared with control.
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Affiliation(s)
- Roger A Vaughan
- Department of Health, Exercise and Sports Science, University of New Mexico, 1 University Blvd, Albuquerque, NM 87131, USA.
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Cai D, Li H, Zhou B, Han L, Zhang X, Yang G, Yang G. Conjugated linoleic acid supplementation caused reduction of perilipin1 and aberrant lipolysis in epididymal adipose tissue. Biochem Biophys Res Commun 2012; 422:621-6. [PMID: 22609209 DOI: 10.1016/j.bbrc.2012.05.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 05/09/2012] [Indexed: 11/18/2022]
Abstract
Perilipin1, a coat protein of lipid droplet, plays a key role in adipocyte lipolysis and fat formation of adipose tissues. However, it is not clear how the expression of perilipin1 is affected in the decreased white adipose tissues (WAT) of mice treated with dietary supplement of conjugated linoleic acids (CLA). Here we obtained lipodystrophic mice by dietary administration of CLA which exhibited reduced epididymal (EPI) WAT, aberrant adipocytes and decreased expression of leptin in this tissue. We found both transcription and translation of perilipin1 was suppressed significantly in EPI WAT of CLA-treated mice compared to that of control mice. The gene expression of negative regulator tumor necrosis factor α (TNFα) and the positive regulator Peroxisome Proliferator-Activated Receptor-γ (PPARγ) of perilipin1 was up-regulated and down-regulated, respectively. In cultured 3T3-L1 cells the promoter activity of perilipin1 was dramatically inhibited in the presence of CLA. Using ex vivo experiment we found that the basal lipolysis was elevated but the hormone-stimulated lipolysis blunted in adipose explants of CLA-treated mice compared to that of control mice, suggesting that the reduction of perilipin1 in white adipose tissues may at least in part contribute to CLA-mediated alternation of lipolysis of WAT.
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Affiliation(s)
- Demin Cai
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan Province, People's Republic of China
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Abstract
This article reviews the current knowledge and experimental research about the mechanisms by which fatty acids and their derivatives control specific gene expression involved during carcinogenesis. Changes in dietary fatty acids, specifically the polyunsaturated fatty acids of the ω-3 and ω-6 families and some derived eicosanoids from lipoxygenases, cyclooxygenases, and cytochrome P-450, seem to control the activity of transcription factor families involved in cancer cell proliferation or cell death. Their regulation may be carried out either through direct binding to DNA as peroxisome proliferator-activated receptors or via modulation in an indirect manner of signaling pathway molecules (e.g., protein kinase C) and other transcription factors (nuclear factor kappa B and sterol regulatory element binding protein). Knowledge of the mechanisms by which fatty acids control specific gene expression may identify important risk factors for cancer and provide insight into the development of new therapeutic strategies for a better management of whole body lipid metabolism.
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Relationship between proteome changes of Longissimus muscle and intramuscular fat content in finishing pigs fed conjugated linoleic acid. Br J Nutr 2010; 105:1-9. [DOI: 10.1017/s0007114510003181] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The present experiment was conducted to determine proteome changes in Longissimus muscle of finishing pigs fed conjugated linoleic acid (CLA), in association with alteration of intramuscular fat content. Previously, seventy-two Duroc × Landrace × Large White gilts (approximately 60 kg) had been fed maize–soyabean meal-based diets with 0, 12·5 and 25 g CLA/kg diet. The CLA contained 369·1 mg/g cis-9, trans-11 CLA, 374·6 mg/g trans-10, cis-12 CLA and 53·7 mg/g other isomers. Six pigs per treatment were slaughtered when they reached a body weight of approximately 100 kg. Data published from a previous experiment demonstrated that supplementation with 12·5 or 25 g CLA/kg diet increased intramuscular fat content (P < 0·05). The present study investigated the proteome changes in Longissimus muscle of control and pigs supplemented with 25 g CLA/kg diet. CLA significantly influenced the abundance of proteins related to energy metabolism, fatty acid oxidation and synthesis, amino acid metabolism, defence, transport and other miscellaneous processes (P < 0·05). The increase in intramuscular fat content was positively correlated with the increased abundance of carbonic anhydrase 3 and aspartate aminotransferase (P < 0·05). We suggest that the proteome changes in Longissimus muscle contributed to greater intramuscular lipid content in CLA-supplemented pigs.
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Overexpression of stearoyl-CoA desaturase-1 results in an increase of conjugated linoleic acid (CLA) and n-7 fatty acids in 293 cells. Biochem Biophys Res Commun 2010; 398:473-6. [DOI: 10.1016/j.bbrc.2010.06.102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 06/23/2010] [Indexed: 11/19/2022]
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