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El-Bana MA, Ashour MN, Rasheed WI, Diab YM, Medhat D. Bombax ceiba Linn. leaf extract rich in phenolic compounds to mitigate non-alcoholic fatty liver-related complications in experimental model. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2023; 20:343-352. [PMID: 36935561 DOI: 10.1515/jcim-2021-0479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 02/24/2023] [Indexed: 06/16/2023]
Abstract
OBJECTIVES Obesity, diabetes mellitus, insulin resistance (IR), and hypertriglyceridemia are common features observed in non-alcoholic fatty liver diseases (NAFLD). There is a critical medical necessity to find novel therapeutics that can halt the development of NAFLD. METHODS Bombax ceiba Linn. leaf extract was prepared and its phytochemical profile was determined. Standard and high carbohydrate high-fat diets (HCHF) were prepared. Rats were fed HCHF for 18 weeks to induce a non-alcoholic fatty liver (NAFL) model. Forty male rats were divided into control, B. ceiba Linn. leaf extract, NAFL, prophylactic, and treated groups. Serum fasting blood sugar (FBS), insulin, insulin resistance (HOMA-IR), cholesterol, high-density lipoprotein (HDL), triglycerides (TG), low density lipoprotein (LDL), alanine aminotransferase (ALT), aspartate aminotransferase (AST), intelectin-1 (ITLN1), p38 MAP kinase (MAPK), peroxisome proliferator-activated receptor alpha (PPAR-α), and interleukin-6 (IL-6) were evaluated. RESULTS Data obtained showed that HCHF-induced NAFL resulting in a significant increase in FBS, serum insulin, HOMA-IR, cholesterol, LDL, TG, ALT, AST, and IL-6 and a significant decrease in serum levels of HDL, ITLN1, p38 MAP kinase, and PPAR-α compared to the control group. The analysis of B. ceiba Linn. leaf extract showed high content of phenol compounds which may cause a significant decrease in the levels of FBS, insulin, HOMA-IR values, lipid profile, and levels of IL-6 while a significant increase in serum levels of LDL, ITLN1, p38 MAP kinase, and PPAR-α compared to the NAFL group. CONCLUSIONS B. ceiba Linn. Leaf extract is a highly protective and promising therapeutic agent against inflammation and oxidative stress in the NAFLD model induced by HCHF.
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Affiliation(s)
- Mona A El-Bana
- Department of Medical Biochemistry, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Giza, Egypt
| | - Magdi N Ashour
- Department of Medical Biochemistry, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Giza, Egypt
| | - Wafaa I Rasheed
- Department of Medical Biochemistry, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Giza, Egypt
| | - Yasser M Diab
- Department of Biochemistry, Faculty of Agriculture, Fayoum University, Fayoum, Egypt
| | - Dalia Medhat
- Department of Medical Biochemistry, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Giza, Egypt
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Mechanism of Huo-Xue-Qu-Yu Formula in Treating Nonalcoholic Hepatic Steatosis by Regulating Lipid Metabolism and Oxidative Stress in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6026319. [PMID: 34007294 PMCID: PMC8102110 DOI: 10.1155/2021/6026319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 01/11/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022]
Abstract
Huo-Xue-Qu-Yu formula (HXQYF) is a prescription consisting of Ginkgo biloba leaf and Paeonia lactiflora Pall. for treating hyperlipidemia and NAFLD in China. Here, we investigated the hepatic and renal function, oxidative stress and lipid metabolism, and potential mechanisms of HXQYF on nonalcoholic fatty liver disease (NAFLD) rat models. NAFLD rat models were induced with high-fat diet (HFD) and 10% fructose water for 18 weeks and orally administered with or without HXQYF simultaneously. The results showed that HXQYF (22.5, 45, 90 mg/kg) significantly improved blood lipid levels via reducing serum TC, TG, LDL-C, and APOB values and elevating HDL-C and APOA1 levels in NAFLD rats. The higher levels of ALT, AST, CR, and BUN in serum induced by HFD were reduced by HXQYF. HE staining showed that HXQYF (90 mg/kg) reduced the accumulation of fat droplets and alleviated inflammatory response in liver cells. Three doses of HXQYF exhibited notable antioxidant effects by elevating SOD, GSH, and CAT activities and decreasing MDA and OH-1 levels in the liver. Furthermore, abnormal lipid metabolism caused by HFD was alleviated by HXQYF, which was associated with the upregulation of PPAR-α, AdipoR2, and CPT1 mRNAs as well as the downregulation of CYP2E1 and SREBP-1c mRNAs in liver tissue. In conclusion, our work verified that HXQYF could reduce the degree of hepatic steatosis, suppress oxidative stress, and attenuate lipid metabolism, thus preventing NAFLD.
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Ambreen G, Siddiq A, Hussain K. Association of long-term consumption of repeatedly heated mix vegetable oils in different doses and hepatic toxicity through fat accumulation. Lipids Health Dis 2020; 19:69. [PMID: 32284066 PMCID: PMC7155260 DOI: 10.1186/s12944-020-01256-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 04/06/2020] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Hepatic diseases are one of the chief reasons for worldwide morbidity and mortality. The increased incidence in Asian countries is driving researchers to explore preventive ways from nature. It is more practical to go with healthy routine edibles like vegetable oils to avoid environmental and chemical hepatic injuries. With the use of thermally oxidized oils overproduction of reactive oxygen species (ROS) with overwhelmed cellular antioxidants defense system results in oxidative stress, the known cause of cardiovascular diseases (CVDs), cancers and neurodegenerative disorders. Little is investigated about the effect of daily used oxidized cooking oils on hepatic function changes with oxidative stress especially in the animal model that mimics the human situation. METHODS In this study, healthy adult male rabbits of local strain were divided into 4 groups (n = 12). First, two sets of rabbits were treated with 1 and 2 ml/kg/day of repeatedly heated mix vegetable oils (RHMVO) respectively. The third set of rabbits was given 1 ml/kg/day of single time heated mix vegetable oils (STHMVO) and the fourth set of rabbits served as controls and fed with normal rabbit diet to for 16 weeks. Serum liver function markers including total-protein, albumin, serum glutamic-oxaloacetic transaminase (SGOT), serum glutamic-pyruvic transaminase (SGPT) and alkaline phosphatase (ALP) along with the activity of hepatic antioxidant-enzymes including superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and malondialdehyde (MDA) for lipid peroxidation were compared among different groups of rabbits. Histopathological examination was performed for all four groups. RESULTS Significantly (p < 0.05) elevated hepatic enzymes and MDA levels, with lower total protein, serum albumin, GPx, SOD and CAT levels were found in high and low doses RHMVO treated groups, in comparison to control. In the STHMVO group, all mentioned markers were insignificantly changed. Accumulation of liver fat in low and high dose oil-treated groups was further confirmed under the microscopic examination of liver tissues, presented significant fat accumulation in liver tissues, in addition, 40-60% increased oxidative stress compared to control, in a dose-dependent manner. CONCLUSIONS These results conclude that consumption of thermally oxidized mix vegetable oils for longer duration can impair the liver function and destroy its histological structure significantly through fat accumulation and oxidative stress both in high as well as low doses.
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Affiliation(s)
- Gul Ambreen
- Department of Pharmacy, Aga Khan University Hospital, Stadium Road (Main Pharmacy), P.O Box 3500, Karachi, 74800, Pakistan.
| | - Afshan Siddiq
- Department of Pharmacology, University of Karachi, Karachi, Pakistan
| | - Kashif Hussain
- Department of Pharmacy, Aga Khan University Hospital, Stadium Road (Main Pharmacy), P.O Box 3500, Karachi, 74800, Pakistan
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Simoes IC, Janikiewicz J, Bauer J, Karkucinska-Wieckowska A, Kalinowski P, Dobrzyń A, Wolski A, Pronicki M, Zieniewicz K, Dobrzyń P, Krawczyk M, Zischka H, Wieckowski MR, Potes Y. Fat and Sugar-A Dangerous Duet. A Comparative Review on Metabolic Remodeling in Rodent Models of Nonalcoholic Fatty Liver Disease. Nutrients 2019; 11:nu11122871. [PMID: 31771244 PMCID: PMC6950566 DOI: 10.3390/nu11122871] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 02/07/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a common disease in Western society and ranges from steatosis to steatohepatitis to end-stage liver disease such as cirrhosis and hepatocellular carcinoma. The molecular mechanisms that are involved in the progression of steatosis to more severe liver damage in patients are not fully understood. A deeper investigation of NAFLD pathogenesis is possible due to the many different animal models developed recently. In this review, we present a comparative overview of the most common dietary NAFLD rodent models with respect to their metabolic phenotype and morphological manifestation. Moreover, we describe similarities and controversies concerning the effect of NAFLD-inducing diets on mitochondria as well as mitochondria-derived oxidative stress in the progression of NAFLD.
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Affiliation(s)
- Ines C.M. Simoes
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland (J.J.); (A.D.); (P.D.); (Y.P.)
| | - Justyna Janikiewicz
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland (J.J.); (A.D.); (P.D.); (Y.P.)
| | - Judith Bauer
- Institute of Toxicology and Environmental Hygiene, Technical University Munich, School of Medicine, Biedersteiner Strasse 29, D-80802 Munich, Germany; (J.B.); (H.Z.)
| | | | - Piotr Kalinowski
- Department of General, Transplant and Liver Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland; (P.K.); (K.Z.)
| | - Agnieszka Dobrzyń
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland (J.J.); (A.D.); (P.D.); (Y.P.)
| | - Andrzej Wolski
- Department of Interventional Radiology and Neuroradiology, Medical University of Lublin, 20-090 Lublin, Poland;
| | - Maciej Pronicki
- Department of Pathology, The Children’s Memorial Health Institute, 04-730 Warsaw, Poland; (A.K.-W.); (M.P.)
| | - Krzysztof Zieniewicz
- Department of General, Transplant and Liver Surgery, Medical University of Warsaw, 02-091 Warsaw, Poland; (P.K.); (K.Z.)
| | - Paweł Dobrzyń
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland (J.J.); (A.D.); (P.D.); (Y.P.)
| | - Marcin Krawczyk
- Laboratory of Metabolic Liver Diseases, Department of General, Transplant and Liver Surgery, Centre for Preclinical Research, Medical University of Warsaw, 02-091 Warsaw, Poland;
- Department of Medicine II, Saarland University Medical Center, 66421 Homburg, Germany
| | - Hans Zischka
- Institute of Toxicology and Environmental Hygiene, Technical University Munich, School of Medicine, Biedersteiner Strasse 29, D-80802 Munich, Germany; (J.B.); (H.Z.)
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, D-85764 Neuherberg, Germany
| | - Mariusz R. Wieckowski
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland (J.J.); (A.D.); (P.D.); (Y.P.)
- Correspondence: ; Tel.: +48-22-5892372
| | - Yaiza Potes
- Nencki Institute of Experimental Biology of Polish Academy of Sciences, 02-093 Warsaw, Poland (J.J.); (A.D.); (P.D.); (Y.P.)
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Díaz-Casado ME, Quiles JL, Barriocanal-Casado E, González-García P, Battino M, López LC, Varela-López A. The Paradox of Coenzyme Q 10 in Aging. Nutrients 2019; 11:nu11092221. [PMID: 31540029 PMCID: PMC6770889 DOI: 10.3390/nu11092221] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/06/2019] [Accepted: 09/08/2019] [Indexed: 12/14/2022] Open
Abstract
Coenzyme Q (CoQ) is an essential endogenously synthesized molecule that links different metabolic pathways to mitochondrial energy production thanks to its location in the mitochondrial inner membrane and its redox capacity, which also provide it with the capability to work as an antioxidant. Although defects in CoQ biosynthesis in human and mouse models cause CoQ deficiency syndrome, some animals models with particular defects in the CoQ biosynthetic pathway have shown an increase in life span, a fact that has been attributed to the concept of mitohormesis. Paradoxically, CoQ levels decline in some tissues in human and rodents during aging and coenzyme Q10 (CoQ10) supplementation has shown benefits as an anti-aging agent, especially under certain conditions associated with increased oxidative stress. Also, CoQ10 has shown therapeutic benefits in aging-related disorders, particularly in cardiovascular and metabolic diseases. Thus, we discuss the paradox of health benefits due to a defect in the CoQ biosynthetic pathway or exogenous supplementation of CoQ10.
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Affiliation(s)
- M Elena Díaz-Casado
- Institute of Biotechnology, Department of Physiology, Biomedical Research Center, University of Granada, Avda del Conocimiento sn, 18016 Granada, Spain.
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), 18016 Granada, Spain.
| | - José L Quiles
- Institute of Nutrition and Food Technology "José Mataix Verdú", Department of Physiology, Biomedical Research Center, University of Granada, Avda del Conocimiento sn, 18016 Granada, Spain.
| | - Eliana Barriocanal-Casado
- Institute of Biotechnology, Department of Physiology, Biomedical Research Center, University of Granada, Avda del Conocimiento sn, 18016 Granada, Spain.
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), 18016 Granada, Spain.
| | - Pilar González-García
- Institute of Biotechnology, Department of Physiology, Biomedical Research Center, University of Granada, Avda del Conocimiento sn, 18016 Granada, Spain.
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), 18016 Granada, Spain.
| | - Maurizio Battino
- Department of Clinical Sicences, Università Politecnica delle Marche, 60131 Ancona, Italy.
- Nutrition and Food Science Group, Department of Analytical and Food Chemistry, CITACA, CACTI, University of Vigo, 36310 Vigo, Spain.
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China.
| | - Luis C López
- Institute of Biotechnology, Department of Physiology, Biomedical Research Center, University of Granada, Avda del Conocimiento sn, 18016 Granada, Spain.
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), 18016 Granada, Spain.
| | - Alfonso Varela-López
- Institute of Nutrition and Food Technology "José Mataix Verdú", Department of Physiology, Biomedical Research Center, University of Granada, Avda del Conocimiento sn, 18016 Granada, Spain.
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Zhu H, Wang Z, Wu Y, Jiang H, Zhou F, Xie X, Wang R, Hua C. Untargeted metabonomics reveals intervention effects of chicory polysaccharide in a rat model of non-alcoholic fatty liver disease. Int J Biol Macromol 2019; 128:363-375. [PMID: 30690116 DOI: 10.1016/j.ijbiomac.2019.01.141] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/18/2019] [Accepted: 01/20/2019] [Indexed: 01/01/2023]
Abstract
In the current study, serum metabolomics techniques were used to evaluate the potential mechanism of the effect of chicory polysaccharides in non-alcoholic fatty liver disease (NAFLD) rats. A rat model of NAFLD was constructed according to the histopathological data and biochemical parameters, while the underlying mechanisms of high-fat diet (HFD) induced NAFLD and the therapeutic effects of chicory polysaccharides (CP) were studied by the adoption of serum metabolomics. The serum metabolites were analyzed by GC/MS. Multivariate statistical approaches such as principal component analysis, revealed significant differences with HFD model and CP groups against the control. Results indicated that CP plays a regulatory role in the occurrence of NAFLD. Meantime, a total of 65 candidate biomarkers were screened and identified. Cluster analysis, enrichment analysis and metabolic pathway analysis of differential metabolites also indicated that amino acid metabolism and fatty acid biosynthesis in NAFLD rats, the β-oxidation and urea cycle of very long-chain fatty acids were mainly disturbed when compared against the control group. The corresponding metabolic pathways in the CP group were relieved compared against the NAFLD rats. These results showed that untargeted metabonomics helps to explain intervention effects of chicory polysaccharide with the rat model of NAFLD.
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Affiliation(s)
- Hua Zhu
- School of Life Sciences, Nanjing Normal University, Nanjing 210023, People's Republic of China; School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China
| | - Zhenjiong Wang
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China.
| | - Yulong Wu
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China
| | - Haitao Jiang
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China
| | - Feng Zhou
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China
| | - Xiaohong Xie
- School of Life Sciences, Nanjing Normal University, Nanjing 210023, People's Republic of China; School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China
| | - Renlei Wang
- Biology Department, Jiangsu Second Normal University, Nanjing 210013, People's Republic of China
| | - Chun Hua
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, People's Republic of China; Jiangsu Provincial Key Construction Laboratory of Special Biomass Byproduct Resource Utilization, Nanjing 211171, People's Republic of China.
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Jensen VS, Hvid H, Damgaard J, Nygaard H, Ingvorsen C, Wulff EM, Lykkesfeldt J, Fledelius C. Dietary fat stimulates development of NAFLD more potently than dietary fructose in Sprague-Dawley rats. Diabetol Metab Syndr 2018; 10:4. [PMID: 29410708 PMCID: PMC5781341 DOI: 10.1186/s13098-018-0307-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 01/16/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND In humans and animal models, excessive intake of dietary fat, fructose and cholesterol has been linked to the development of non-alcoholic fatty liver disease (NAFLD). However, the individual roles of the dietary components remain unclear. To investigate this further, we compared the effects of a high-fat diet, a high-fructose diet and a combination diet with added cholesterol on the development of NAFLD in rats. METHODS Forty male Sprague-Dawley rats were randomized into four groups receiving either a control-diet (Control: 10% fat); a high-fat diet (HFD: 60% fat, 20% carbohydrate), a high-fructose diet [HFr: 10% fat, 70% carbohydrate (mainly fructose)] or a high-fat/high-fructose/high-cholesterol-diet (NASH: 40% fat, 40% carbohydrate (mainly fructose), 2% cholesterol) for 16 weeks. RESULTS After 16 weeks, liver histology revealed extensive steatosis and inflammation in both NASH- and HFD-fed rats, while hepatic changes in HFr-rats were much more subtle. These findings were corroborated by significantly elevated hepatic triglyceride content in both NASH- (p < 0.01) and HFD-fed rats (p < 0.0001), elevated hepatic cholesterol levels in NASH-fed rats (p < 0.0001), but no changes in HFr-fed rats, compared to Control. On the contrary, only HFr-fed rats developed dyslipidemia as characterized by higher levels of plasma triglycerides compared to all other groups (p < 0.0001). Hepatic dysfunction and inflammation was confirmed in HFD-fed rats by elevated levels of hepatic MCP-1 (p < 0.0001), TNF-alpha (p < 0.001) and plasma β-hydroxybutyrate (p < 0.0001), and in NASH-fed rats by elevated levels of hepatic MCP-1 (p < 0.01), increased hepatic macrophage infiltration (p < 0.001), and higher plasma levels of alanine aminotransferase (p < 0.0001) aspartate aminotransferase (p < 0.05), haptoglobin (p < 0.001) and TIMP-1 (p < 0.01) compared to Control. CONCLUSION These findings show that dietary fat and cholesterol are the primary drivers of NAFLD development and progression in rats, while fructose mostly exerts its effect on the circulating lipid pool.
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Affiliation(s)
- Victoria Svop Jensen
- Department of Veterinary and Animal Science, Faculty of Health and Medical Sciences, University of Copenhagen, Ridebanevej 9, 1870 Frederiksberg, Denmark
- Insulin Pharmacology, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
| | - Henning Hvid
- Insulin Pharmacology, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
| | - Jesper Damgaard
- Insulin Pharmacology, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
| | - Helle Nygaard
- Insulin Pharmacology, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
| | - Camilla Ingvorsen
- Histology and Imaging, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
| | - Erik Max Wulff
- Obesity and Diabetes Pharmacology, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
| | - Jens Lykkesfeldt
- Department of Veterinary and Animal Science, Faculty of Health and Medical Sciences, University of Copenhagen, Ridebanevej 9, 1870 Frederiksberg, Denmark
| | - Christian Fledelius
- Insulin Pharmacology, Novo Nordisk A/S, Novo Nordisk Park 1, 2760 Maaloev, Denmark
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Emamat H, Foroughi F, Eini-Zinab H, Taghizadeh M, Rismanchi M, Hekmatdoost A. The effects of onion consumption on treatment of metabolic, histologic, and inflammatory features of nonalcoholic fatty liver disease. J Diabetes Metab Disord 2016; 15:25. [PMID: 27453880 PMCID: PMC4957858 DOI: 10.1186/s40200-016-0248-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 07/14/2016] [Indexed: 12/11/2022]
Abstract
Background The aim of this study was to evaluate the effects of onion powder consumption on treatment of Non-alcoholic Fatty Liver Disease (NAFLD) in an experimental model of disease. Methods Sprague–Dawley rats were fed high-fat (HF) diet for seven weeks to induce the NAFLD. Then, they were treated by either the same diet (HF), or high-fat diet plus 7 % onion powder (HF + onion), or chow diet (control), or chow diet plus 7 % onion powder (control + onion)ad libitum for four weeks. Serum levels of fasting glucose, triglyceride, cholesterol, liver enzymes, insulin, and hepatic tumor necrosis factor-alpha (TNF-α) gene expression were determined. Hepatic histology was examined by Hematoxylin and Eosin stain. Results Dietary food intakes and weigh gain were significantly more in animals fed control + onion diet in comparison to the other groups. Animals fed control or control + onion diet had significantly lower plasma levels of hepatic enzymes, lipid profile, glycemic indices, and hepatic TNF-α gene expression as compared with HF diet fed groups; however, there was no significant difference in the histopathologic features of NAFLD among different groups. Conclusion Our results indicate that onion consumption can be effective in NAFLD management when it is combined with a healthy diet. Electronic supplementary material The online version of this article (doi:10.1186/s40200-016-0248-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hadi Emamat
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Forough Foroughi
- Department of Pathology, Taleghani Hospital, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hassan Eini-Zinab
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohsen Taghizadeh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Marjan Rismanchi
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Azita Hekmatdoost
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Emamat H, Noori M, Foroughi F, Rismanchi M, Eini-Zinab H, Hekmatdoost A. An Accessible and Pragmatic Experimental Model of Nonalcoholic Fatty Liver Disease. Middle East J Dig Dis 2016; 8:109-15. [PMID: 27252817 PMCID: PMC4885609 DOI: 10.15171/mejdd.2016.15] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND
There is no convenient cheap pragmatic experimental model for Nonalcoholic Fatty
Liver Disease (NAFLD)/Nonalcoholic Steatohepatitis (NASH). Objective: Our objective
was to create a pragmatic model of NAFLD/NASH.
METHODS
Sprague-Dawley rats were fed a high-fat, high sugar homemade diet ad libitum for
seven weeks. The high-fat, high sugar diet included 59% of energy derived from fat,
30% from carbohydrates, and 11% from protein. Serum levels of fasting glucose, triglyceride,
cholesterol, liver enzymes, insulin, and hepatic tumor necrosis factor-alpha
(TNF-α) gene expression were determined. Hepatic histology was examined by H&E
stain.
RESULTS
Rats fed the high-fat, high sugar diet developed hepatic steatosis, and a moderate
inflammation, which was associated with increased serum levels of liver enzymes,
glucose, insulin, triglyceride, cholesterol, and hepatic TNF-α gene expression.
CONCLUSION
This rat model resembles the key features of human NAFLD/NASH and provides a
simple pragmatic experimental model for elucidating the disease prevention and treatment.
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Affiliation(s)
- Hadi Emamat
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Noori
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Forough Foroughi
- Department of Pathology, Taleghani Hospital, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Marjan Rismanchi
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hassan Eini-Zinab
- Department of Community Nutrition, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Azita Hekmatdoost
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Varela-López A, Giampieri F, Battino M, Quiles JL. Coenzyme Q and Its Role in the Dietary Therapy against Aging. Molecules 2016; 21:373. [PMID: 26999099 PMCID: PMC6273282 DOI: 10.3390/molecules21030373] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 03/10/2016] [Accepted: 03/11/2016] [Indexed: 12/12/2022] Open
Abstract
Coenzyme Q (CoQ) is a naturally occurring molecule located in the hydrophobic domain of the phospholipid bilayer of all biological membranes. Shortly after being discovered, it was recognized as an essential electron transport chain component in mitochondria where it is particularly abundant. Since then, more additional roles in cell physiology have been reported, including antioxidant, signaling, death prevention, and others. It is known that all cells are able to synthesize functionally sufficient amounts of CoQ under normal physiological conditions. However, CoQ is a molecule found in different dietary sources, which can be taken up and incorporated into biological membranes. It is known that mitochondria have a close relationship with the aging process. Additionally, delaying the aging process through diet has aroused the interest of scientists for many years. These observations have stimulated investigation of the anti-aging potential of CoQ and its possible use in dietary therapies to alleviate the effects of aging. In this context, the present review focus on the current knowledge and evidence the roles of CoQ cells, its relationship with aging, and possible implications of dietary CoQ in relation to aging, lifespan or age-related diseases.
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Affiliation(s)
- Alfonso Varela-López
- Department of Physiology, Institute of Nutrition and Food Technology "José Mataix", Biomedical Research Center (CIBM), University of Granada, Avda. del Conocimiento s.n., Armilla, Granada 18100, Spain.
| | - Francesca Giampieri
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO), Facoltà di Medicina, Università Politecnica delle Marche, Ancona 60131, Italy.
| | - Maurizio Battino
- Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche (DISCO), Facoltà di Medicina, Università Politecnica delle Marche, Ancona 60131, Italy.
- Centre for Nutrition & Health, Universidad Europea del Atlantico (UEA), Santander 39011, Spain.
| | - José L Quiles
- Department of Physiology, Institute of Nutrition and Food Technology "José Mataix", Biomedical Research Center (CIBM), University of Granada, Avda. del Conocimiento s.n., Armilla, Granada 18100, Spain.
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11
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Krishna S, Lin Z, de La Serre CB, Wagner JJ, Harn DH, Pepples LM, Djani DM, Weber MT, Srivastava L, Filipov NM. Time-dependent behavioral, neurochemical, and metabolic dysregulation in female C57BL/6 mice caused by chronic high-fat diet intake. Physiol Behav 2016; 157:196-208. [PMID: 26852949 DOI: 10.1016/j.physbeh.2016.02.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 01/05/2016] [Accepted: 02/03/2016] [Indexed: 02/08/2023]
Abstract
High-fat diet (HFD) induced obesity is associated not only with metabolic dysregulation, e.g., impaired glucose homeostasis and insulin sensitivity, but also with neurological dysfunction manifested with aberrant behavior and/or neurotransmitter imbalance. Most studies have examined HFD's effects predominantly in male subjects, either in the periphery or on the brain, in isolation and after a finite feeding period. In this study, we evaluated the time-course of selected metabolic, behavioral, and neurochemical effects of HFD intake in parallel and at multiple time points in female (C57BL/6) mice. Peripheral effects were evaluated at three feeding intervals (short: 5-6 weeks, long: 20-22 weeks, and prolonged: 33-36 weeks). Central effects were evaluated only after long and prolonged feeding durations; we have previously reported those effects after the short (5-6 weeks) feeding duration. Ongoing HFD feeding resulted in an obese phenotype characterized by increased visceral adiposity and, after prolonged HFD intake, an increase in liver and kidney weights. Peripherally, 5 weeks of HFD intake was sufficient to impair glucose tolerance significantly, with the deleterious effects of HFD being greater with prolonged intake. Similarly, 5 weeks of HFD consumption was sufficient to impair insulin sensitivity. However, sensitivity to insulin after prolonged HFD intake was not different between control, low-fat diet (LFD) and HFD-fed mice, most likely due to age-dependent decrease in insulin sensitivity in the LFD-fed mice. HFD intake also induced bi-phasic hepatic inflammation and it increased gut permeability. Behaviorally, prolonged intake of HFD caused mice to be hypoactive and bury fewer marbles in a marble burying task; the latter was associated with significantly impaired hippocampal serotonin homeostasis. Cognitive (short-term recognition memory) function of mice was unaffected by chronic HFD feeding. Considering our prior findings of short-term (5-6 weeks) HFD-induced central (hyperactivity/anxiety and altered ventral hippocampal neurochemistry) effects and our current results, it seems that in female mice some metabolic/inflammatory dysregulations caused by HFD, such as gut permeability, appear early and persist, whereas others, such as glucose intolerance, are exaggerated with continuous HFD feeding; behaviorally, prolonged HFD consumption mainly affects locomotor activity and anxiety-like responses, likely due to the advanced obesity phenotype; neurochemically, the serotonergic system appears to be most sensitive to continued HFD feeding.
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Affiliation(s)
- Saritha Krishna
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Zhoumeng Lin
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Claire B de La Serre
- Department of Foods and Nutrition, College of Family and Consumer Sciences, University of Georgia, Athens, GA, 30602, USA
| | - John J Wagner
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Donald H Harn
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Lacey M Pepples
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Dylan M Djani
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Matthew T Weber
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Leena Srivastava
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Nikolay M Filipov
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA.
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Botham KM, Napolitano M, Bravo E. The Emerging Role of Disturbed CoQ Metabolism in Nonalcoholic Fatty Liver Disease Development and Progression. Nutrients 2015; 7:9834-46. [PMID: 26633474 PMCID: PMC4690053 DOI: 10.3390/nu7125501] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/10/2015] [Accepted: 11/12/2015] [Indexed: 12/16/2022] Open
Abstract
Although non-alcoholic fatty liver disease (NAFLD), characterised by the accumulation of triacylglycerol in the liver, is the most common liver disorder, the causes of its development and progression to the more serious non-alcoholic steatohepatitis (NASH) remain incompletely understood. Oxidative stress has been implicated as a key factor in both these processes, and mitochondrial dysfunction and inflammation are also believed to play a part. Coenzyme Q (CoQ) is a powerful antioxidant found in all cell membranes which has an essential role in mitochondrial respiration and also has anti-inflammatory properties. NAFLD has been shown to be associated with disturbances in plasma and liver CoQ concentrations, but the relationship between these changes and disease development and progression is not yet clear. Dietary supplementation with CoQ has been found to be hepatoprotective and to reduce oxidative stress and inflammation as well as improving mitochondrial dysfunction, suggesting that it may be beneficial in NAFLD. However, studies using animal models or patients with NAFLD have given inconclusive results. Overall, evidence is now emerging to indicate that disturbances in CoQ metabolism are involved in NAFLD development and progression to NASH, and this highlights the need for further studies with human subjects to fully clarify its role.
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Affiliation(s)
- Kathleen M Botham
- Department of Comparative Biomedical Sciences, The Royal Veterinary College, Royal College St., London NW1-0TU, UK.
| | - Mariarosaria Napolitano
- Department of Haematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome 00161, Italy.
| | - Elena Bravo
- Department of Haematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome 00161, Italy.
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Bogdański P, Suliburska J, Szulińska M, Sikora M, Walkowiak J, Jakubowski H. L-Arginine and vitamin C attenuate pro-atherogenic effects of high-fat diet on biomarkers of endothelial dysfunction in rats. Biomed Pharmacother 2015; 76:100-6. [PMID: 26653556 DOI: 10.1016/j.biopha.2015.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 10/23/2015] [Indexed: 12/26/2022] Open
Abstract
High-fat diet (HFD) is known to cause endothelial dysfunction and contribute to atherosclerosis progression. The objective of this study was to evaluate the efficacy of L-arginine (L-Arg) and vitamin C supplementation as a potentially useful strategy for modulation of serum homocysteine (Hcy) levels, tumor necrosis factor alpha (TNF-α), oxidative stress, and insulin resistance induced by HFD in rats. Six weeks-old female and male Wistar rats were divided into five groups of twelve rats each and treated for six weeks with: group 1, standard diet; group 2, HFD; group 3, HFD supplemented with L-Arg (20g/kg diet); group 4, HFD supplemented with L-Arg (20g/kg diet) plus vitamin C (100mg/kg diet); group 5, HFD supplemented with vitamin C (100mg/kg diet). HFD significantly elevated TNF-α, reduced total antioxidant status (TAS), and increased insulin resistance (HOMA-IR). Significant increases of total cholesterol (TCH), LDL cholesterol (LDL), triglyceride (TG) and a decrease of HDL cholesterol (HDL) were observed in HFD rats. Supplementation with l-Arg prevented the decrease of TAS and the increases in HOMA-IR, LDL, and TG levels. Moreover, Hcy and TNF-α levels were reduced in L-Arg supplemented group. Supplementation with vitamin C significantly atenuated TAS decrease and lowered LDL levels. L-Arg plus vitamin C enhanced L-Arg effect on TAS and protected against TNF-α increase. Western blot analysis showed that l-Arg supplementation of HFD rats reduced the level of protein carbonyls. Taken together, these findings indicate that supplemental l-arginine and/or vitamin C, by their abilities to modulate biomarkers of HFD-induced endothelial dysfunction, are anti-atherogenic.
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Affiliation(s)
- Paweł Bogdański
- Department of Education and Obesity Treatment and Metabolic Disorders, Poznan University of Medical Sciences, Szamarzewskiego 84 Str., 60-569 Poznan, Poland
| | - Joanna Suliburska
- Department of Human Nutrition and Hygiene, Poznan University of Life Sciences, Wojska Polskiego 31 Str., 60-624 Poznan, Poland
| | - Monika Szulińska
- Department of Education and Obesity Treatment and Metabolic Disorders, Poznan University of Medical Sciences, Szamarzewskiego 84 Str., 60-569 Poznan, Poland
| | - Marta Sikora
- European Centre for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Piotrowo 1 Str., 61-138 Poznan, Poland
| | - Jarosław Walkowiak
- Department of Pediatric Gastroenterology and Metabolic Diseases, University of Medical Sciences, Szpitalna 27/33 Str., 60-572 Poznan, Poland
| | - Hieronim Jakubowski
- Department of Biochemistry and Biotechnology, University of Life Sciences, Dojazd 11 Str., 60-632 Poznan, Poland; Institute of Bioorganic Chemistry, Noskowskiego 12/14 Str., 61-704 Poznan, Poland; Department of Microbiology, Biochemistry & Molecular Genetics, Rutgers University, New Jersey Medical School, International Center for Public Health, Newark, NJ 07103-3535, USA.
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Varela-Lopez A, Bullon P, Battino M, Ramirez-Tortosa MC, Ochoa JJ, Cordero MD, Ramirez-Tortosa CL, Rubini C, Zizzi A, Quiles JL. Coenzyme Q Protects Against Age-Related Alveolar Bone Loss Associated to n-6 Polyunsaturated Fatty Acid Rich-Diets by Modulating Mitochondrial Mechanisms. J Gerontol A Biol Sci Med Sci 2015. [DOI: 10.1093/gerona/glv063] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yan Z, Fan R, Yin S, Zhao X, Liu J, Li L, Zhang W, Ge L. Protective effects of Ginkgo biloba leaf polysaccharide on nonalcoholic fatty liver disease and its mechanisms. Int J Biol Macromol 2015; 80:573-80. [PMID: 26047899 DOI: 10.1016/j.ijbiomac.2015.05.054] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 05/27/2015] [Accepted: 05/30/2015] [Indexed: 12/11/2022]
Abstract
A water-soluble polysaccharide fraction extracted from the leaf of Ginkgo biloba was named GBLP. The protective effect of GBLP on nonalcoholic fatty liver disease (NAFLD) was observed and underlying mechanism was explored. Wistar male rats were randomly divided into five groups, namely, normal control group, model control group and GBLP groups (100, 200 and 400 mg/kg/d). A rat model of NAFLD was established in male Wistar rats by feeding with high-fat diet (HFD) for 8 weeks. On day 57, the intragastric administration of GBLP started once daily for 4 weeks. The results showed that GBLP supplementation significantly and dose-dependently lowered the weight gain of body, liver index and serum lipid parameters in HFD-fed rat. Meanwhile, GBLP attenuated HFD-induced liver injury through reducing hepatic steatosis, TG accumulation, serum ALT, AST and ALP levels. GBLP had a positive effect on obesity-associated insulin resistance (IR) via reducing serum glucose and insulin levels. Furthermore, GBLP enhanced the activities of antioxidant enzymes and reduced MDA levels in serum and liver. These results indicate that GBLP can play a certain protective role against HFD-induced NAFLD, and the protective effects may be associated with attenuating IR, preserving liver function, enhancing antioxidant defense system, and reducing lipid peroxidation.
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Affiliation(s)
- Zhengui Yan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China.
| | - Ruifeng Fan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
| | - Shaojie Yin
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
| | - Xiaona Zhao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
| | - Jianzhu Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
| | - Liuhui Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
| | - Wenqi Zhang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
| | - Lijiang Ge
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, PR China
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Fujii TMDM, Jacob PS, Yamada M, Borges MC, Norde MM, Pantaleão LC, Oliveira DMD, Tirapegui J, Castro IAD, Borelli P, Fock RA, Rogero MM. Yerba Mate (Ilex paraguariensis) modulates NF-kappaB pathway and AKT expression in the liver of rats fed on a high-fat diet. Int J Food Sci Nutr 2014; 65:967-76. [DOI: 10.3109/09637486.2014.945153] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Alam MA, Rahman MM. Mitochondrial dysfunction in obesity: potential benefit and mechanism of Co-enzyme Q10 supplementation in metabolic syndrome. J Diabetes Metab Disord 2014; 13:60. [PMID: 24932457 PMCID: PMC4057567 DOI: 10.1186/2251-6581-13-60] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 05/03/2014] [Indexed: 02/06/2023]
Abstract
Co-enzyme Q10 (Co-Q10) is an essential component of the mitochondrial electron transport chain. Most cells are sensitive to co-enzyme Q10 (Co-Q10) deficiency. This deficiency has been implicated in several clinical disorders such as heart failure, hypertension, Parkinson's disease and obesity. The lipid lowering drug statin inhibits conversion of HMG-CoA to mevalonate and lowers plasma Co-Q10 concentrations. However, supplementation with Co-Q10 improves the pathophysiological condition of statin therapy. Recent evidence suggests that Co-Q10 supplementation may be useful for the treatment of obesity, oxidative stress and the inflammatory process in metabolic syndrome. The anti-inflammatory response and lipid metabolizing effect of Co-Q10 is probably mediated by transcriptional regulation of inflammation and lipid metabolism. This paper reviews the evidence showing beneficial role of Co-Q10 supplementation and its potential mechanism of action on contributing factors of metabolic and cardiovascular complications.
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Affiliation(s)
- Md Ashraful Alam
- School of Biomedical Science, The University of Queensland, Brisbane, Australia
- Department of Pharmaceutical Sciences, North South University, Dhaka, Bangladesh
| | - Md Mahbubur Rahman
- Department of Pharmaceutical Sciences, North South University, Dhaka, Bangladesh
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18
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Ameliorative potential of Tamarindus indica on high fat diet induced nonalcoholic fatty liver disease in rats. ScientificWorldJournal 2014; 2014:507197. [PMID: 24688399 PMCID: PMC3932208 DOI: 10.1155/2014/507197] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Accepted: 12/16/2013] [Indexed: 12/13/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD), the prevalence of which is rising globally with current upsurge in obesity, is one of the most frequent causes of chronic liver diseases. The present study evaluated the ameliorative effect of extract of Tamarindus indica seed coat (ETS) on high fat diet (HFD) induced NAFLD, after daily administration at 45, 90, and 180 mg/kg body weight dose levels for a period of 6 weeks, in albino Wistar rats. Treatment with ETS at all tested dose levels significantly attenuated the pathological alterations associated with HFD induced NAFLD viz. hepatomegaly, elevated hepatic lipid and lipid peroxides, serum alanine aminotransferase, and free fatty acid levels as well as micro-/macrohepatic steatosis. Moreover, extract treatment markedly reduced body weight and adiposity along with an improvement in insulin resistance index. The study findings, therefore suggested the therapeutic potential of ETS against NAFLD, acting in part through antiobesity, insulin sensitizing, and antioxidant mechanisms.
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Sasidharan SR, Joseph JA, Anandakumar S, Venkatesan V, Ariyattu Madhavan CN, Agarwal A. An experimental approach for selecting appropriate rodent diets for research studies on metabolic disorders. BIOMED RESEARCH INTERNATIONAL 2013; 2013:752870. [PMID: 24151620 PMCID: PMC3787574 DOI: 10.1155/2013/752870] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 07/29/2013] [Accepted: 07/30/2013] [Indexed: 11/17/2022]
Abstract
Diverse high energy diets have been utilized to precipitate obesity and related metabolic disorders in rodent models, though the dietary intervention has not absolutely been standardized. The present study established usage of a customized semipurified normal control diet (NCD) and high fat diet (HFD), for research studies on diet-induced metabolic disorders in albino rats. Male Wistar rats were fed with normal pellet diet (NPD) or customized NCDs I, II, III or HFDs I, II, III for 12 weeks and parameters, namely, body weight, visceral adiposity, serum triglycerides, cholesterol, and glucose were evaluated to select an appropriate NCD and HFD. The selected HFD was further evaluated for induction of fatty liver, whilst type 2 diabetes (T2D) induction was confirmed in HFD and streptozotocin (STZ) induced diabetes model in Wistar rats. Amongst different diets tested, NCD-I and HFD-I were selected, since NCD-I exhibited close resemblance to NPD, whereas HFD-I induced metabolic alterations, particularly obesity and dyslipidemia consistently. Moreover, HFD-I elevated terminal hepatic lipids, while HFD-I/STZ treatment augmented insulin resistance index and serum glucose levels significantly indicating effective induction of fatty liver and T2D, respectively. Therefore, customized semipurified NCD-I and HFD-I can be recommended for research studies on diet-induced metabolic disorders in albino Wistar rats.
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Affiliation(s)
| | - Joshua Allan Joseph
- R&D Centre, Natural Remedies, Plot No. 5B, Veerasandra Indl. Area, 19th K.M. Stone, Hosur Road, Electronic City, Bangalore, Karnataka 560 100, India
| | - Senthilkumar Anandakumar
- R&D Centre, Natural Remedies, Plot No. 5B, Veerasandra Indl. Area, 19th K.M. Stone, Hosur Road, Electronic City, Bangalore, Karnataka 560 100, India
| | - Vijayabalaji Venkatesan
- R&D Centre, Natural Remedies, Plot No. 5B, Veerasandra Indl. Area, 19th K.M. Stone, Hosur Road, Electronic City, Bangalore, Karnataka 560 100, India
| | | | - Amit Agarwal
- R&D Centre, Natural Remedies, Plot No. 5B, Veerasandra Indl. Area, 19th K.M. Stone, Hosur Road, Electronic City, Bangalore, Karnataka 560 100, India
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Radika M, Viswanathan P, Anuradha C. Nitric oxide mediates the insulin sensitizing effects of β-sitosterol in high fat diet-fed rats. Nitric Oxide 2013; 32:43-53. [DOI: 10.1016/j.niox.2013.04.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 04/10/2013] [Accepted: 04/17/2013] [Indexed: 02/07/2023]
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Activation of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase during high fat diet feeding. Biochim Biophys Acta Mol Basis Dis 2013; 1832:1560-8. [PMID: 23651731 DOI: 10.1016/j.bbadis.2013.04.024] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 12/12/2022]
Abstract
The liver plays a central role in regulating cholesterol homeostasis. High fat diets have been shown to induce obesity and hyperlipidemia. Despite considerable advances in our understanding of cholesterol metabolism, the regulation of liver cholesterol biosynthesis in response to high fat diet feeding has not been fully addressed. The aim of the present study was to investigate mechanisms by which a high fat diet caused activation of liver 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMG-CoA reductase) leading to increased cholesterol biosynthesis. Mice were fed a high fat diet (60% kcal fat) for 5weeks. High fat diet feeding induced weight gain and elevated lipid levels (total cholesterol and triglyceride) in both the liver and serum. Despite cholesterol accumulation in the liver, there was a significant increase in hepatic HMG-CoA reductase mRNA and protein expression as well as enzyme activity. The DNA binding activity of sterol regulatory element binding protein (SREBP)-2 and specific protein 1 (Sp1) were also increased in the liver of mice fed a high fat diet. To validate the in vivo findings, HepG2 cells were treated with palmitic acid. Such a treatment activated SREBP-2 as well as increased the mRNA and enzyme activity of HMG-CoA reductase leading to intracellular cholesterol accumulation. Inhibition of Sp1 by siRNA transfection abolished palmitic acid-induced SREBP-2 and HMG-CoA reductase mRNA expression. These results suggest that Sp1-mediated SREBP-2 activation contributes to high fat diet induced HMG-CoA reductase activation and increased cholesterol biosynthesis. This may play a role in liver cholesterol accumulation and hypercholesterolemia.
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Macedo LFL, Rogero MM, Guimarães JP, Granato D, Lobato LP, Castro IA. Effect of red wines with different in vitro antioxidant activity on oxidative stress of high-fat diet rats. Food Chem 2013. [DOI: 10.1016/j.foodchem.2012.10.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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23
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Botelho PB, Mariano KDR, Rogero MM, de Castro IA. Effect of Echium oil compared with marine oils on lipid profile and inhibition of hepatic steatosis in LDLr knockout mice. Lipids Health Dis 2013; 12:38. [PMID: 23510369 PMCID: PMC3627902 DOI: 10.1186/1476-511x-12-38] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 03/01/2013] [Indexed: 12/22/2022] Open
Abstract
Background In an effort to identify new alternatives for long-chain n-3 polyunsaturated fatty acids (LC n-3 PUFA) supplementation, the effect of three sources of omega 3 fatty acids (algae, fish and Echium oils) on lipid profile and inflammation biomarkers was evaluated in LDL receptor knockout mice. Methods The animals received a high fat diet and were supplemented by gavage with an emulsion containing water (CON), docosahexaenoic acid (DHA, 42.89%) from algae oil (ALG), eicosapentaenoic acid (EPA, 19.97%) plus DHA (11.51%) from fish oil (FIS), and alpha-linolenic acid (ALA, 26.75%) plus stearidonic acid (SDA, 11.13%) from Echium oil (ECH) for 4 weeks. Results Animals supplemented with Echium oil presented lower cholesterol total and triacylglycerol concentrations than control group (CON) and lower VLDL than all of the other groups, constituting the best lipoprotein profile observed in our study. Moreover, the Echium oil attenuated the hepatic steatosis caused by the high fat diet. However, in contrast to the marine oils, Echium oil did not affect the levels of transcription factors involved in lipid metabolism, such as Peroxisome Proliferator Activated Receptor α (PPAR α) and Liver X Receptor α (LXR α), suggesting that it exerts its beneficial effects by a mechanism other than those observed to EPA and DHA. Echium oil also reduced N-6/N-3 FA ratio in hepatic tissue, which can have been responsible for the attenuation of steatosis hepatic observed in ECH group. None of the supplemented oils reduced the inflammation biomarkers. Conclusion Our results suggest that Echium oil represents an alternative as natural ingredient to be applied in functional foods to reduce cardiovascular disease risk factors.
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Affiliation(s)
- Patrícia Borges Botelho
- LADAF, NAPAN, Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of São Paulo, Av. Lineu Prestes 580, São Paulo B14-05508-900, Brazil
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Chen S, Lin G, Lei L, You X, Wu C, Xu W, Huang M, Luo L, Wang Z, Li Y, Zhao X, Yan F. Hyperlipidemia Modifies Innate Immune Responses to Lipopolysaccharide via the TLR-NF-κB Signaling Pathway. Inflammation 2013; 36:968-76. [DOI: 10.1007/s10753-013-9628-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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25
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Borges MC, Vinolo MA, Crisma AR, Fock RA, Borelli P, Tirapegui J, Curi R, Rogero MM. High-fat diet blunts activation of the nuclear factor-κB signaling pathway in lipopolysaccharide-stimulated peritoneal macrophages of Wistar rats. Nutrition 2013; 29:443-9. [DOI: 10.1016/j.nut.2012.06.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 04/29/2012] [Accepted: 06/16/2012] [Indexed: 12/24/2022]
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Chen P, Xia K, Zhao Z, Deng X, Yang T. Atorvastatin modulates the DDAH1/ADMA system in high-fat diet-induced insulin-resistant rats with endothelial dysfunction. Vasc Med 2012. [PMID: 23184902 DOI: 10.1177/1358863x12467492] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Dimethylarginine dimethyl-aminohydrolase 1 (DDAH1) is a metabolic enzyme for asymmetric dimethylarginine (ADMA), both of which are closely related to endothelial function. Endothelial dysfunction, a main risk factor of cardiovascular diseases, can be attributed to insulin resistance. We aimed to determine the effects of atorvastatin, an endothelium-protective drug, on DDAH1/ADMA in insulin-resistant rats. Insulin resistance in male Sprague-Dawley rats was induced with a high-fat diet for 8 weeks. Some rats received atorvastatin (30 mg/kg/day) for an additional 8 weeks. Insulin-resistant rats exhibited not only decreases in the DDAH activity and aortic expression of DDAH1 and sterol regulatory element-binding protein 1 (SREBP1) but also increases in plasma ADMA levels, all of which were inhibited by atorvastatin. Insulin sensitivity and DDAH activity showed a significant positive correlation. In conclusion, our results suggest that atorvastatin may modulate DDAH1/ADMA to improve endothelial function in insulin-resistant rats; SREBP1 may also play a role in this.
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Affiliation(s)
- Po Chen
- Cardiology Department, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Ke Xia
- Cardiology Department, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
- Institute of Molecular Medicine and Surgery (MMK), Rolf Luft Centrum, Karolinska Hospital, Stockholm, Sweden
| | - Zhenyu Zhao
- Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, PR China
| | - Xu Deng
- Cardiology Department, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Tianlun Yang
- Cardiology Department, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
- Institute of Hypertension, Central South University, Changsha, Hunan, PR China
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Jacob PS, de Meneses Fujii TM, Yamada M, Borges MC, Pantaleão LC, Borelli P, Fock R, Rogero MM. Isocaloric intake of a high-fat diet promotes insulin resistance and inflammation in Wistar rats. Cell Biochem Funct 2012; 31:244-53. [PMID: 23008133 DOI: 10.1002/cbf.2894] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Revised: 08/19/2012] [Accepted: 08/20/2012] [Indexed: 12/22/2022]
Abstract
The aim of this study was to investigate the effect of isocaloric intake from a high-fat diet (HFD) on insulin resistance and inflammation in rats. Male Wistar rats were fed on an HFD (n = 12) or control diet (n = 12) for 12 weeks. Subsequently, all animals were euthanized, and blood glucose, insulin, free fatty acids, C-reactive protein, lipid profile, cytokines and hepatic-enzyme activity were determined. Carcass chemical composition was also analyzed. During the first and the twelfth weeks of the experimental protocol, the oral glucose tolerance test and insulin tolerance test were performed and demonstrated insulin resistance (P < 0.05) in the HFD group. Although food intake (g) was lower (P < 0.05) in the HFD group compared with the control group, the concentration of total cholesterol, low-density lipoprotein, C-reactive protein and liver weight were all significantly higher. The kinase inhibitor of κB, c-Jun N-terminal kinase and protein kinase B expressions were determined in the liver and skeletal muscle. After an insulin stimulus, the HFD group demonstrated decreased (P = 0.05) hepatic protein kinase B expression, whereas the kinase inhibitor of κB phospho/total ratio was elevated in the HFD muscle (P = 0.02). In conclusion, the isocaloric intake from the HFD induced insulin resistance, associated with impaired insulin signalling in the liver and an inflammatory response in the muscle.
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Affiliation(s)
- Patrícia Silva Jacob
- Department of Nutrition, School of Public Health, University of Sao Paulo, Sao Paulo, Brazil
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28
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Coenzyme Q metabolism is disturbed in high fat diet-induced non-alcoholic fatty liver disease in rats. Int J Mol Sci 2012; 13:1644-1657. [PMID: 22408414 PMCID: PMC3291983 DOI: 10.3390/ijms13021644] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 01/12/2012] [Accepted: 01/29/2012] [Indexed: 01/21/2023] Open
Abstract
Oxidative stress is believed to be a major contributory factor in the development of non alcoholic fatty liver disease (NAFLD), the most common liver disorder worldwide. In this study, the effects of high fat diet-induced NAFLD on Coenzyme Q (CoQ) metabolism and plasma oxidative stress markers in rats were investigated. Rats were fed a standard low fat diet (control) or a high fat diet (57% metabolizable energy as fat) for 18 weeks. The concentrations of total (reduced + oxidized) CoQ9 were increased by >2 fold in the plasma of animals fed the high fat diet, while those of total CoQ10 were unchanged. Reduced CoQ levels were raised, but oxidized CoQ levels were not, thus the proportion in the reduced form was increased by about 75%. A higher percentage of plasma CoQ9 as compared to CoQ10 was in the reduced form in both control and high fat fed rats. Plasma protein thiol (SH) levels were decreased in the high fat-fed rats as compared to the control group, but concentrations of lipid hydroperoxides and low density lipoprotein (LDL) conjugated dienes were unchanged. These results indicate that high fat diet-induced NAFLD in rats is associated with altered CoQ metabolism and increased protein, but not lipid, oxidative stress.
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29
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Non-alcoholic fatty liver disease impairs hippocampal-dependent memory in male rats. Physiol Behav 2012; 106:133-41. [PMID: 22280920 DOI: 10.1016/j.physbeh.2012.01.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 11/19/2011] [Accepted: 01/10/2012] [Indexed: 12/29/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a disorder observed in children and adults characterized by an accumulation of liver fat (>5% wet weight) in the absence of excessive alcohol intake. NAFLD affects 10 to 30% of the American population and is the most common cause of liver disease in the United States. NAFLD leads to serious disturbances in cardiovascular and hormonal function; however, possible effects on brain function have been overlooked. The aims of the present study were to test whether diet-induced NAFLD impairs hippocampal-dependent memory and to determine whether any observed deficits are associated with changes in hippocampal insulin signaling or concentrations of brain-derived neurotrophic factor (BDNF) and insulin-like growth factor-1 (IGF-1). Post-weanling male Sprague-Dawley rats were fed a high fructose (60% of calories) or control diet for 12 weeks and then trained and tested in a spatial water maze. NAFLD was confirmed with postmortem measures of liver mass and liver lipid concentrations. NAFLD did not affect acquisition of the spatial water maze, but did impair retention tested 48 h later. Specifically, both groups demonstrated similar decreases in latency to swim to the escape platform over training trials, but on the memory test NAFLD rats took longer to reach the platform and made fewer visits to the platform location than control diet rats. There were no differences between the groups in terms of insulin-stimulated phosphorylation of insulin receptor β subunit (IR-β) and protein kinase B (PKB/AKT) in hippocampal slices or hippocampal BDNF or IGF-1 concentrations. Thus, these data indicate that NAFLD impairs hippocampal-dependent memory function and that the deficit does not appear attributable to alterations in hippocampal insulin signaling or hippocampal BDNF or IGF-1 concentrations.
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Dhibi M, Brahmi F, Mnari A, Houas Z, Chargui I, Bchir L, Gazzah N, Alsaif MA, Hammami M. The intake of high fat diet with different trans fatty acid levels differentially induces oxidative stress and non alcoholic fatty liver disease (NAFLD) in rats. Nutr Metab (Lond) 2011; 8:65. [PMID: 21943357 PMCID: PMC3192664 DOI: 10.1186/1743-7075-8-65] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Accepted: 09/23/2011] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Trans-fatty acids (TFA) are known as a risk factor for coronary artery diseases, insulin resistance and obesity accompanied by systemic inflammation, the features of metabolic syndrome. Little is known about the effects on the liver induced by lipids and also few studies are focused on the effect of foods rich in TFAs on hepatic functions and oxidative stress. This study investigates whether high-fat diets with different TFA levels induce oxidative stress and liver dysfunction in rats. METHODS Male Wistar rats were divided randomly into four groups (n = 12/group): C receiving standard-chow; Experimental groups that were fed high-fat diet included 20% fresh soybean oil diet (FSO), 20% oxidized soybean oil diet (OSO) and 20% margarine diet (MG). Each group was kept on the treatment for 4 weeks. RESULTS A liver damage was observed in rats fed with high-fat diet via increase of liver lipid peroxidation and decreased hepatic antioxidant enzyme activities (superoxide dismutase, catalase and glutathione peroxidase). The intake of oxidized oil led to higher levels of lipid peroxidation and a lower concentration of plasma antioxidants in comparison to rats fed with FSO. The higher inflammatory response in the liver was induced by MG diet. Liver histopathology from OSO and MG groups showed respectively moderate to severe cytoplasm vacuolation, hypatocyte hypertrophy, hepatocyte ballooning, and necroinflammation. CONCLUSION It seems that a strong relationship exists between the consumption of TFA in the oxidized oils and lipid peroxidation and non alcoholic fatty liver disease (NAFLD). The extent of the peroxidative events in liver was also different depending on the fat source suggesting that feeding margarine with higher TFA levels may represent a direct source of oxidative stress for the organism. The present study provides evidence for a direct effect of TFA on NAFLD.
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Affiliation(s)
- Madiha Dhibi
- Laboratory of Biochemistry, UR: "Human Nutrition and Metabolic Disorder" Faculty of Medicine of Monastir 5019, Tunisia
| | - Faten Brahmi
- Laboratory of Biochemistry, UR: "Human Nutrition and Metabolic Disorder" Faculty of Medicine of Monastir 5019, Tunisia
| | - Amira Mnari
- Laboratory of Biochemistry, UR: "Human Nutrition and Metabolic Disorder" Faculty of Medicine of Monastir 5019, Tunisia
| | - Zohra Houas
- Laboratory of Histology Cytology and Genetics, Faculty of Medicine, Monastir 5019, Tunisia
| | - Issam Chargui
- Laboratory of Histology Cytology and Genetics, Faculty of Medicine, Monastir 5019, Tunisia
| | - Linda Bchir
- Laboratory of Biochemistry, UR: "Human Nutrition and Metabolic Disorder" Faculty of Medicine of Monastir 5019, Tunisia
| | - Noureddine Gazzah
- Laboratory of Biochemistry, UR: "Human Nutrition and Metabolic Disorder" Faculty of Medicine of Monastir 5019, Tunisia
| | - Mohammed A Alsaif
- College of Applied Medical Sciences, VPP Unit, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed Hammami
- Laboratory of Biochemistry, UR: "Human Nutrition and Metabolic Disorder" Faculty of Medicine of Monastir 5019, Tunisia
- College of Applied Medical Sciences, VPP Unit, King Saud University, Riyadh, Saudi Arabia
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Morris EM, Rector RS, Thyfault JP, Ibdah JA. Mitochondria and redox signaling in steatohepatitis. Antioxid Redox Signal 2011; 15:485-504. [PMID: 21128703 PMCID: PMC3118705 DOI: 10.1089/ars.2010.3795] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alcoholic and nonalcoholic fatty liver diseases are potentially pathological conditions that can progress to steatohepatitis, fibrosis, and cirrhosis. These conditions affect millions of people throughout the world in part through poor lifestyle choices of excess alcohol consumption, overnutrition, and lack of regular physical activity. Abnormal mitochondrial and cellular redox homeostasis has been documented in steatohepatitis and results in alterations of multiple redox-sensitive signaling cascades. Ultimately, these changes in signaling lead to altered enzyme function and transcriptional activities of proteins critical to mitochondrial and cellular function. In this article, we review the current hypotheses linking mitochondrial redox state to the overall pathophysiology of alcoholic and nonalcoholic steatohepatitis and briefly discuss the current therapeutic options under investigation.
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Affiliation(s)
- E Matthew Morris
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Missouri, Columbia, Missouri 65212, USA
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Bravo E, Palleschi S, Aspichueta P, Buqué X, Rossi B, Cano A, Napolitano M, Ochoa B, Botham KM. High fat diet-induced non alcoholic fatty liver disease in rats is associated with hyperhomocysteinemia caused by down regulation of the transsulphuration pathway. Lipids Health Dis 2011; 10:60. [PMID: 21504583 PMCID: PMC3096990 DOI: 10.1186/1476-511x-10-60] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 04/19/2011] [Indexed: 12/13/2022] Open
Abstract
Background Hyperhomocysteinemia (HHcy) causes increased oxidative stress and is an independent risk factor for cardiovascular disease. Oxidative stress is now believed to be a major contributory factor in the development of non alcoholic fatty liver disease, the most common liver disorder worldwide. In this study, the changes which occur in homocysteine (Hcy) metabolism in high fat-diet induced non alcoholic fatty liver disease (NAFLD) in rats were investigated. Methods and results After feeding rats a standard low fat diet (control) or a high fat diet (57% metabolisable energy as fat) for 18 weeks, the concentration of homocysteine in the plasma was significantly raised while that of cysteine was lowered in the high fat as compared to the control diet fed animals. The hepatic activities of cystathionine β-synthase (CBS) and cystathionine γ-lyase (CGS), the enzymes responsible for the breakdown of homocysteine to cysteine via the transsulphuration pathway in the liver, were also significantly reduced in the high fat-fed group. Conclusions These results indicate that high fat diet-induced NAFLD in rats is associated with increased plasma Hcy levels caused by down-regulation of hepatic CBS and CGL activity. Thus, HHcy occurs at an early stage in high fat diet-induced NAFLD and is likely to contribute to the increased risk of cardiovascular disease associated with the condition.
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Affiliation(s)
- Elena Bravo
- Department of Cellular Biology and Neuroscience, Istituto Superiore Sanità, Rome, Italy.
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33
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Jung HL, Kang HY. Effects of endurance exercise and high-fat diet on insulin resistance and ceramide contents of skeletal muscle in sprague-dawley rats. KOREAN DIABETES JOURNAL 2010; 34:244-52. [PMID: 20835342 PMCID: PMC2932894 DOI: 10.4093/kdj.2010.34.4.244] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Accepted: 06/24/2010] [Indexed: 11/23/2022]
Abstract
Background We evaluated the effects of endurance exercise and a high-fat diet on insulin resistance and ceramide contents of skeletal muscle in Sprague-Dawley rats. Methods We randomly divided 32 rats into four groups: control (CON, n = 8), high fat diet (HF, n = 8), exercise (Ex, 24 m/min for 2 hours, 5 days/wk, n = 8), HF/Ex (n = 8). After 4-week treatments, plasma lipid profiles, glucose and insulin concentrations were measured. The triglycerides (TG), ceramide, and glucose transporter 4 (GLUT-4) contents were measured in the skeletal muscle. The rate of glucose transport was determined under submaximal insulin concentration during the muscle incubation. Results Free fatty acid levels were significantly higher in CON and HF than Ex (P = 0.032). Plasma glucose levels in HF were significantly higher than the two Ex groups (P = 0.002), and insulin levels were significantly higher in HF than in other three groups (P = 0.021). Muscular TG concentrations were significantly higher in HF than CON and Ex and also in HF/Ex than Ex, respectively (P = 0.005). Hepatic TG concentrations were significantly higher in HF than other three groups but Ex was significantly lower than HF/Ex (P = 0.000). Muscular ceramide content in HF was significantly greater than that in either Ex or HF/Ex (P = 0.031). GLUT-4 levels in CON and HF were significantly lower than those in Ex and HF/Ex (P = 0.009, P = 0.003). The glucose transport rate in submaximal insulin concentration was lower in CON than in either Ex or HF/Ex (P = 0.043), but not different from HF. Conclusion This study suggests that high fat diet for 4 weeks selectively impairs insulin resistance, but not glucose transport rate, GLUT-4 and ceramide content in skeletal muscle per se. However, endurance exercise markedly affects the content of ceramide and insulin resistance in muscle.
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Affiliation(s)
- Hyun Lyung Jung
- Exercise Metabolism Laboratory, Department of Physical Education, Kyungpook National University, Daegu, Korea
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Zhang X, Yang J, Guo Y, Ye H, Yu C, Xu C, Xu L, Wu S, Sun W, Wei H, Gao X, Zhu Y, Qian X, Jiang Y, Li Y, He F. Functional proteomic analysis of nonalcoholic fatty liver disease in rat models: enoyl-coenzyme a hydratase down-regulation exacerbates hepatic steatosis. Hepatology 2010; 51:1190-9. [PMID: 20162621 DOI: 10.1002/hep.23486] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
UNLABELLED Nonalcoholic fatty liver disease (NAFLD) has emerged as a common public health problem that can progress to end-stage liver disease. A high-fat diet (HFD) may promote the development of NAFLD through a mechanism that is poorly understood. We adopted a proteomic approach to examine the effect of HFD on the liver proteome during the progression of NAFLD. Male Sprague-Dawley rats fed an HFD for 4, 12, and 24 weeks replicated the progression of human NAFLD: steatosis, nonspecific inflammation, and steatohepatitis. Using two-dimensional difference gel electrophoresis (DIGE) combined with matrix-assisted laser desorption ionization time of flight/time of flight analysis, 95 proteins exhibiting significant changes (ratio > or = 1.5 or < or =-1.5, P < 0.05) during the development of NAFLD were identified. Biological functions for these proteins reflected phase-specific characteristics during the progression of the disease. The potential role of enoyl-coenzyme A hydratase (ECHS1), an enzyme that catalyzes the second step of mitochondrial fatty acid beta-oxidation, received further investigation. First, the reduced protein level of ECHS1 was validated both in rat models and in patients with biopsy-proven hepatic simple steatosis via immunoblotting or immunohistochemical analysis. Then the small interfering RNA (siRNA)-mediated knockdown of ECHS1 in the murine hepatocyte cell line alpha mouse liver 12 (AML12) demonstrated increased cellular lipid accumulation induced by free fatty acid (FFA) overload. Furthermore, using a hydradynamic transfection method, the in vivo silencing effect of siRNA duplexes targeting ECHS1 was further investigated in mice. Administering ECHS1 siRNA specifically reduced the expression of ECHS1 protein in mice liver, which significantly exacerbated the hepatic steatosis induced by an HFD. CONCLUSION Our results revealed that ECHS1 down-regulation contributed to HFD-induced hepatic steatosis, which may help clarify the pathogenesis of NAFLD and point to potential targets for therapeutic interventions.
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Affiliation(s)
- Xuequn Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China
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Tan Y, Chen JH, Zhang JN, Wang LJ, Liu HX. Therapeutic effects of diet change on nonalcoholic fatty liver disease. Shijie Huaren Xiaohua Zazhi 2009; 17:3394-3401. [DOI: 10.11569/wcjd.v17.i33.3394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the therapeutic effects of diet change on nonalcoholic fatty liver disease (NAFLD) and explore potential mechanisms involved.
METHODS: Eighty Sprague-Dawley male rats were randomly and equally divided into five groups: two normal control groups (NG8 and NG12 groups; fed a normal diet for 8 and 12 weeks, respectively), two high-fat diet groups (HG8 and HG12 groups; fed a high-fat diet for 8 and 12 weeks, respectively), and one diet change group (DG group; fed a high-fat diet for 8 weeks and a normal diet for another 4 weeks). The glucose infusion rate (GIR) was detected by the euglycemic hyperinsulinemic clamp test. The levels of ALT, AST, TG, TC, FFAs, FBS, FIns, TNF-α, SOD and MDA in the serum or liver were tested using a biochemistry automatic analyzer or by radioimmunoassay (RIA). The expression of c-Jun N-terminal protein kinase 1 (JNK1), insulin receptor substrate-1 (IRS-1) and phospho-IRS-1 Ser307 (p-IRS-1Ser307) was detected by Western blot.
RESULTS: Compared with the two matched NG groups, the body weight, liver index, the levels of ALT, AST, TG, TC, FFAs, FIns and TNF-α in the serum and TG, TC, FFAs and MDA in the liver increased (all P < 0.05 or 0.01), the level of SOD in the liver and GIR decreased (t = 4.88 and 7.92, respectively; both P < 0.05), and the expression of JNK1 protein and p-IRS-1Ser307 in the liver was upregulated in the two HG groups (t = 4.39, 5.81; 4.60, and 6.48, respectively). Significant differences were also noted in the above parameters between the HG8 and HG12 groups (all P < 0.05 or 0.01). A positive correlation was found between the expression intensity of JNK1 and insulin resistance (IR). The fatty degeneration of hepatocytes was aggravated in the HG groups with the prolongation of feeding time. In the DG group, all the above parameters were improved but did not return to normal levels as those in the NG groups (all P < 0.05).
CONCLUSION: A rat model of NAFLD and a rat model of NASH are established by feeding rats a high-fat diet for 8 weeks and 12 weeks, respectively. Diet change can improve NAFLD induced by a high fat diet.
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Zhang M, Wang XQ, Zhou YK, Ma YL, Shen TY, Chen HQ, Chu ZX, Qin HL. Effects of oral Lactobacillus plantarum on hepatocyte tight junction structure and function in rats with obstructive jaundice. Mol Biol Rep 2009; 37:2989-99. [PMID: 19816788 DOI: 10.1007/s11033-009-9866-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Accepted: 09/29/2009] [Indexed: 01/16/2023]
Abstract
Surgery and infection are prominent risk factors for the development of obstructive cholestasis which in turn is associated with failure of the liver barrier. We studied the effects of oral Lactobacillus plantarum (LP) supplementation on endotoxemia, oxidative stress, apoptosis, and tight junctions of hepatocytes in an experimental model of obstructive jaundice. Fifty male Wistar rats were randomly divided into five groups of 10 each: group I, sham-operated; group II, ligation and division of the common bile duct (BDL); group III, BLD followed by oral LP treatment; group IV, BDL followed by internal biliary drainage (IBD); group V, BDL followed by IBD and oral LP treatment. Hepatocyte apoptosis, plasma reduced glutathione (GSH) and oxidized glutathione (GSSG) levels, and portal blood endotoxin levels were measured and changes in tight junction-associated proteins occludin, claudin-1, claudin-4, and ZO-1 were observed. Compared to the sham-operated group I, significant increases in endotoxemia, apoptosis, and GSSG were observed in group II and significant decreases were observed in group V. Tight junctions were destroyed in group II animals but were not in animals treated with oral LP (groups III and V). An increase in occludin, claudin-1, claudin-4, and ZO-1 mRNA and protein levels were detected in livers in LP-treated animals (group V) compared with group II levels. Oral LP treatment of rats with obstructive jaundice assisted in the return of active hepatic barrier function. These results may lead to treatments to prevent the deleterious effects of obstructive jaundice.
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Affiliation(s)
- Ming Zhang
- Department of Surgery, The Sixth People's Hospital Affiliated to Shanghai Jiaotong University, 600 Yishan Road, 200233 Shanghai, China
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