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Lee HL, Kim JM, Go MJ, Joo SG, Kim TY, Lee HS, Kim JH, Son JS, Heo HJ. Fermented Protaetia brevitarsis Larvae Ameliorates Chronic Ethanol-Induced Hepatotoxicity in Mice via AMPK and TLR-4/TGF-β1 Pathways. J Microbiol Biotechnol 2024; 34:606-621. [PMID: 38111317 PMCID: PMC11016765 DOI: 10.4014/jmb.2310.10003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 12/20/2023]
Abstract
This study evaluated the hepatoprotective effect of fermented Protaetia brevitarsis larvae (FPB) in ethanol-induced liver injury mice. As a result of amino acids in FPB, 18 types of amino acids including essential amino acids were identified. In the results of in vitro tests, FPB increased alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) activities. In addition, FPB treatment increased cell viability on ethanol- and H2O2-induced HepG2 cells. FPB ameliorated serum biomarkers related to hepatoxicity including glutamic oxaloacetic transaminase, glutamine pyruvic transaminase, total bilirubin, and lactate dehydrogenase and lipid metabolism including triglyceride, total cholesterol, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol. Also, FPB controlled ethanol metabolism enzymes by regulating the protein expression levels of ADH, ALDH, and cytochrome P450 2E1 in liver tissue. FPB protected hepatic oxidative stress by improving malondialdehyde content, reduced glutathione, and superoxide dismutase levels. In addition, FPB reversed mitochondrial dysfunction by regulating reactive oxygen species production, mitochondrial membrane potential, and ATP levels. FPB protected ethanol-induced apoptosis, fatty liver, and hepatic inflammation through p-AMP-activated protein kinase and TLR-4/NF-κB signaling pathways. Furthermore, FPB prevented hepatic fibrosis by decreasing TGF-β1/Smad pathway. In summary, these results suggest that FPB might be a potential prophylactic agent for the treatment of alcoholic liver disease via preventing liver injury such as fatty liver, hepatic inflammation due to chronic ethanol-induced oxidative stress.
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Affiliation(s)
- Hyo Lim Lee
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jong Min Kim
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Min Ji Go
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Seung Gyum Joo
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Tae Yoon Kim
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Han Su Lee
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Ju Hui Kim
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jin-Sung Son
- HMO Health Dream Agricultural Association Corporation, Republic of Korea
| | - Ho Jin Heo
- Division of Applied Life Science (BK21), Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
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Thilakarathna WPDW, Rupasinghe HPV. Proanthocyanidins-Based Synbiotics as a Novel Strategy for Nonalcoholic Fatty Liver Disease (NAFLD) Risk Reduction. Molecules 2024; 29:709. [PMID: 38338453 PMCID: PMC10856248 DOI: 10.3390/molecules29030709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 01/29/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD), the most common liver disease worldwide, is a spectrum of liver abnormalities ranging from steatosis to nonalcoholic steatohepatitis (NASH) characterized by excessive lipid accumulation. The prevalence of NAFLD is predicted to increase rapidly, demanding novel approaches to reduce the global NAFLD burden. Flavonoids, the most abundant dietary polyphenols, can reduce the risk of NAFLD. The majority of dietary flavonoids are proanthocyanidins (PACs), which are oligomers and polymers of the flavonoid sub-group flavan-3-ols. The efficacy of PAC in reducing the NAFLD risk can be significantly hindered by low bioavailability. The development of synbiotics by combining PAC with probiotics may increase effectiveness against NAFLD by biotransforming PAC into bioavailable metabolites. PAC and probiotic bacteria are capable of mitigating steatosis primarily through suppressing de novo lipogenesis and promoting fatty acid β-oxidation. PAC and probiotic bacteria can reduce the progression of steatosis to NASH mainly through ameliorating hepatic damage and inflammation induced by hepatic oxidative stress, endoplasmic reticulum stress, and gut microbiota dysbiosis. Synbiotics of PAC are superior in reducing the risk of NAFLD compared to independent administration of PAC and probiotics. The development of PAC-based synbiotics can be a novel strategy to mitigate the increasing incidence of NAFLD.
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Affiliation(s)
- Wasitha P. D. W. Thilakarathna
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada;
| | - H. P. Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada;
- Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4H7, Canada
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Alhasaniah AH. l-carnitine: Nutrition, pathology, and health benefits. Saudi J Biol Sci 2023; 30:103555. [PMID: 36632072 PMCID: PMC9827390 DOI: 10.1016/j.sjbs.2022.103555] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/09/2022] [Accepted: 12/28/2022] [Indexed: 12/31/2022] Open
Abstract
Carnitine is a medically needful nutrient that contributes in the production of energy and the metabolism of fatty acids. Bioavailability is higher in vegetarians than in people who eat meat. Deficits in carnitine transporters occur as a result of genetic mutations or in combination with other illnesses such like hepatic or renal disease. Carnitine deficit can arise in diseases such endocrine maladies, cardiomyopathy, diabetes, malnutrition, aging, sepsis, and cirrhosis due to abnormalities in carnitine regulation. The exogenously provided molecule is obviously useful in people with primary carnitine deficits, which can be life-threatening, and also some secondary deficiencies, including such organic acidurias: by eradicating hypotonia, muscle weakness, motor skills, and wasting are all improved l-carnitine (LC) have reported to improve myocardial functionality and metabolism in ischemic heart disease patients, as well as athletic performance in individuals with angina pectoris. Furthermore, although some intriguing data indicates that LC could be useful in a variety of conditions, including carnitine deficiency caused by long-term total parenteral supplementation or chronic hemodialysis, hyperlipidemias, and the prevention of anthracyclines and valproate-induced toxicity, such findings must be viewed with caution.
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Key Words
- AD, Alzheimer's disease
- AIF, Apoptosis-inducing factor
- Anti-wasting effect
- BBB, Blood–brain barrier
- CC, Cancer cachexia
- CHF, Chronic heart failure
- COPD, Chronic obstructive pulmonary disease
- ESRD, End-stage renal disease
- GOT, Glutamic oxaloacetic transaminase
- HCC, Hepatocellular carcinoma
- HFD, High-Fat Diet
- HOI, Highest observed intake
- Health benefits
- LC, l-carnitine
- MI, myocardial infarction
- MTX, Methotrexate
- NF-kB, Nuclear factor-kB
- Nutrition
- OSL, Observed safe level
- PCD, Primary carnitine deficiency
- Pathology
- ROS, Reactive oxygen species
- SCD, Secondary carnitine deficiency
- TLE, Temporal lobe epilepsy
- VD, Vascular dementia
- l-carnitine
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Affiliation(s)
- Abdulaziz Hassan Alhasaniah
- Department of Clinical Laboratory Sciences, Faculty of Applied Medical Sciences, Najran University, P.O. Box 1988, Najran 61441, Saudi Arabia
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4
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Huguenard CJC, Cseresznye A, Darcey T, Nkiliza A, Evans JE, Hazen SL, Mullan M, Crawford F, Abdullah L. Age and APOE affect L-carnitine system metabolites in the brain in the APOE-TR model. Front Aging Neurosci 2023; 14:1059017. [PMID: 36688151 PMCID: PMC9853982 DOI: 10.3389/fnagi.2022.1059017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/12/2022] [Indexed: 01/07/2023] Open
Abstract
With age the apolipoprotein E (APOE) E4 allele (involved in lipid homeostasis) is associated with perturbation of bioenergetics pathways in Alzheimer's disease (AD). We therefore hypothesized that in aging mice APOE genotype would affect the L-carnitine system (central to lipid bioenergetics), in the brain and in the periphery. Using liquid chromatography-mass spectrometry, levels of L-carnitine and associated metabolites: γ-butyrobetaine (GBB), crotonobetaine, as well as acylcarnitines, were evaluated at 10-, 25-, and 50-weeks, in the brain and the periphery, in a targeted replacement mouse model of human APOE (APOE-TR). Aged APOE-TR mice were also orally administered 125 mg/kg of L-carnitine daily for 7 days followed by evaluation of brain, liver, and plasma L-carnitine system metabolites. Compared to E4-TR, an age-dependent increase among E2- and E3-TR mice was detected for medium- and long-chain acylcarnitines (MCA and LCA, respectively) within the cerebrovasculature and brain parenchyma. While following L-carnitine oral challenge, E4-TR mice had higher increases in the L-carnitine metabolites, GBB and crotonobetaine in the brain and a reduction of plasma to brain total acylcarnitine ratios compared to other genotypes. These studies suggest that with aging, the presence of the E4 allele may contribute to alterations in the L-carnitine bioenergetic system and to the generation of L-carnitine metabolites that could have detrimental effects on the vascular system. Collectively the E4 allele and aging may therefore contribute to AD pathogenesis through aging-related lipid bioenergetics as well as cerebrovascular dysfunctions.
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Affiliation(s)
- Claire J. C. Huguenard
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
- School of Life, Health and Chemical Sciences, Open University, Milton Keynes, United Kingdom
| | - Adam Cseresznye
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
| | - Teresa Darcey
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
| | - Aurore Nkiliza
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
- James A. Haley VA Hospital, Tampa, FL, United States
| | - James E. Evans
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
| | - Stanley L. Hazen
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Cleveland, OH, United States
| | - Michael Mullan
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
- School of Life, Health and Chemical Sciences, Open University, Milton Keynes, United Kingdom
| | - Fiona Crawford
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
- School of Life, Health and Chemical Sciences, Open University, Milton Keynes, United Kingdom
- James A. Haley VA Hospital, Tampa, FL, United States
| | - Laila Abdullah
- Department of Metabolomics, Roskamp Institute, Sarasota, FL, United States
- School of Life, Health and Chemical Sciences, Open University, Milton Keynes, United Kingdom
- James A. Haley VA Hospital, Tampa, FL, United States
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Reduction of Obesity and Insulin Resistance through Dual Targeting of VAT and BAT by a Novel Combination of Metabolic Cofactors. Int J Mol Sci 2022; 23:ijms232314923. [PMID: 36499250 PMCID: PMC9738317 DOI: 10.3390/ijms232314923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/24/2022] [Accepted: 11/26/2022] [Indexed: 12/02/2022] Open
Abstract
Obesity is an epidemic disease worldwide, characterized by excessive fat accumulation associated with several metabolic perturbations, such as metabolic syndrome, insulin resistance, hypertension, and dyslipidemia. To improve this situation, a specific combination of metabolic cofactors (MC) (betaine, N-acetylcysteine, L-carnitine, and nicotinamide riboside) was assessed as a promising treatment in a high-fat diet (HFD) mouse model. Obese animals were distributed into two groups, orally treated with the vehicle (obese + vehicle) or with the combination of metabolic cofactors (obese + MC) for 4 weeks. Body and adipose depots weights; insulin and glucose tolerance tests; indirect calorimetry; and thermography assays were performed at the end of the intervention. Histological analysis of epidydimal white adipose tissue (EWAT) and brown adipose tissue (BAT) was carried out, and the expression of key genes involved in both fat depots was characterized by qPCR. We demonstrated that MC supplementation conferred a moderate reduction of obesity and adiposity, an improvement in serum glucose and lipid metabolic parameters, an important improvement in lipid oxidation, and a decrease in adipocyte hypertrophy. Moreover, MC-treated animals presented increased adipose gene expression in EWAT related to lipolysis and fatty acid oxidation. Furthermore, MC supplementation reduced glucose intolerance and insulin resistance, with an increased expression of the glucose transporter Glut4; and decreased fat accumulation in BAT, raising non-shivering thermogenesis. This treatment based on a specific combination of metabolic cofactors mitigates important pathophysiological characteristics of obesity, representing a promising clinical approach to this metabolic disease.
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Microbiota Dysbiosis and Gut Barrier Dysfunction Associated with Non-Alcoholic Fatty Liver Disease Are Modulated by a Specific Metabolic Cofactors' Combination. Int J Mol Sci 2022; 23:ijms232213675. [PMID: 36430154 PMCID: PMC9692973 DOI: 10.3390/ijms232213675] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/31/2022] [Accepted: 11/04/2022] [Indexed: 11/10/2022] Open
Abstract
The gut is a selective barrier that not only allows the translocation of nutrients from food, but also microbe-derived metabolites to the systemic circulation that flows through the liver. Microbiota dysbiosis occurs when energy imbalances appear due to an unhealthy diet and a sedentary lifestyle. Dysbiosis has a critical impact on increasing intestinal permeability and epithelial barrier deterioration, contributing to bacterial and antigen translocation to the liver, triggering non-alcoholic fatty liver disease (NAFLD) progression. In this study, the potential therapeutic/beneficial effects of a combination of metabolic cofactors (a multi-ingredient; MI) (betaine, N-acetylcysteine, L-carnitine, and nicotinamide riboside) against NAFLD were evaluated. In addition, we investigated the effects of this metabolic cofactors' combination as a modulator of other players of the gut-liver axis during the disease, including gut barrier dysfunction and microbiota dysbiosis. Diet-induced NAFLD mice were distributed into two groups, treated with the vehicle (NAFLD group) or with a combination of metabolic cofactors (NAFLD-MI group), and small intestines were harvested from all animals for histological, molecular, and omics analysis. The MI treatment ameliorated gut morphological changes, decreased gut barrier permeability, and reduced gene expression of some proinflammatory cytokines. Moreover, epithelial cell proliferation and the number of goblet cells were increased after MI supplementation. In addition, supplementation with the MI combination promoted changes in the intestinal microbiota composition and diversity, as well as modulating short-chain fatty acids (SCFAs) concentrations in feces. Taken together, this specific combination of metabolic cofactors can reverse gut barrier disruption and microbiota dysbiosis contributing to the amelioration of NAFLD progression by modulating key players of the gut-liver axis.
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Alterations in Energy Metabolism, Mitochondrial Function and Redox Homeostasis in GK Diabetic Rat Tissues Treated with Aspirin. LIFE (BASEL, SWITZERLAND) 2022; 12:life12010104. [PMID: 35054496 PMCID: PMC8780217 DOI: 10.3390/life12010104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/04/2022] [Accepted: 01/10/2022] [Indexed: 11/22/2022]
Abstract
Our recent studies have demonstrated that aspirin treatment prevents inflammatory and oxidative stress-induced alterations in mitochondrial function, improves glucose tolerance and pancreatic endocrine function and preserves tissue-specific glutathione (GSH)-dependent redox homeostasis in Goto-Kakizaki (GK) diabetic rats. In the current study, we have investigated the mechanism of action of aspirin in maintaining mitochondrial bioenergetics and redox metabolism in the liver and kidneys of GK rats. Aspirin reduced the production of reactive oxygen species (ROS) and oxidative stress-induced changes in GSH metabolism. Aspirin treatment also improved mitochondrial respiratory function and energy metabolism, in addition to regulating the expression of cell signaling proteins that were altered in diabetic animals. Ultrastructural electron microscopy studies revealed decreased accumulation of glycogen in the liver of aspirin-treated diabetic rats. Hypertrophic podocytes with irregular fusion of foot processes in the renal glomerulus and detached microvilli, condensed nuclei and degenerated mitochondria observed in the proximal convoluted tubules of GK rats were partially restored by aspirin. These results provide additional evidence to support our previous observation of moderation of diabetic complications by aspirin treatment in GK rats and may have implications for cautious use of aspirin in the therapeutic management of diabetes.
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Abdel-Emam RA, Ali MF. Effect of l-carnitine supplementation on lead acetate-induced liver cell apoptosis and inflammation: role of caspase-3 and glycogen synthase kinase-3β enzymes. Life Sci 2021; 291:120277. [PMID: 34979196 DOI: 10.1016/j.lfs.2021.120277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/11/2021] [Accepted: 12/24/2021] [Indexed: 01/09/2023]
Abstract
AIM The study aimed at studying the hepatoprotective effect of l-carnitine against lead (Pb) acetate-induced hepatocellular injury, emphasizing the role of caspase-3 and glycogen synthase kinase-3β in hepatocellular apoptosis and inflammation. MATERIALS AND METHODS Male Wistar rats were used. The experimental approach involved estimation of the liver enzymes' serum levels. Oxidative and inflammatory biomarkers were measured in hepatic tissue homogenates. Paraffin-embedded hepatic sections were prepared for histopathology and immunohistochemistry. Quantitative determination of the phosphorylated glycogen synthase kinase-3 beta was performed. KEY FINDINGS The serum showed a significant elevation in ALT, AST, and LDH; tissue homogenates showed significant elevation in lipid peroxide and inflammatory biomarkers with significant reduction in reduced glutathione in the Pb acetate-treated group. Co-administration of l-carnitine with Pb acetate produced significant reduction in liver enzymes with significant improvement in oxidant, antioxidant and inflammatory markers. Lead acetate treatment significantly reduced the phosphorylated glycogen synthase kinase-3 beta, while l-carnitine enhanced its phosphorylation. Histopathological examination showed inflammatory reaction around blood vessels with fatty degeneration in hepatocytes of the Pb acetate intoxicated group. l-Carnitine caused a decrease in hepatic damage with minimal vascular alterations in central vein. Caspase-3 expression in hepatocytes was decreased in Pb-treated group supplemented with l-carnitine. SIGNIFICANCE Our study reveals that oxidative stress and inflammation participate in Pb acetate-induced hepatocellular injury. Glycogen synthase kinase-3β and caspase-3 play role in Pb acetate-induced hepatic damage. l-Carnitine shows significant protective effects against hepatocellular apoptosis and inflammation induced by Pb acetate through antioxidant, anti-inflammatory and anti-apoptotic pathways in part mediated by GSK-3β inhibition.
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Affiliation(s)
- Rania A Abdel-Emam
- Department of Pharmacology, Faculty of Medicine, Assiut University, Assiut 71526, Egypt.
| | - Marwa F Ali
- Department of Pathology and Clinical Pathology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.
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Quesada-Vázquez S, Colom-Pellicer M, Navarro-Masip È, Aragonès G, Del Bas JM, Caimari A, Escoté X. Supplementation with a Specific Combination of Metabolic Cofactors Ameliorates Non-Alcoholic Fatty Liver Disease, Hepatic Fibrosis, and Insulin Resistance in Mice. Nutrients 2021; 13:3532. [PMID: 34684533 PMCID: PMC8541294 DOI: 10.3390/nu13103532] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 11/21/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH) have emerged as the leading causes of chronic liver disease in the world. Obesity, insulin resistance, and dyslipidemia are multifactorial risk factors strongly associated with NAFLD/NASH. Here, a specific combination of metabolic cofactors (a multi-ingredient; MI) containing precursors of glutathione (GSH) and nicotinamide adenine dinucleotide (NAD+) (betaine, N-acetyl-cysteine, L-carnitine and nicotinamide riboside) was evaluated as effective treatment for the NAFLD/NASH pathophysiology. Six-week-old male mice were randomly divided into control diet animals and animals exposed to a high fat and high fructose/sucrose diet to induce NAFLD. After 16 weeks, diet-induced NAFLD mice were distributed into two groups, treated with the vehicle (HFHFr group) or with a combination of metabolic cofactors (MI group) for 4 additional weeks, and blood and liver were obtained from all animals for biochemical, histological, and molecular analysis. The MI treatment reduced liver steatosis, decreasing liver weight and hepatic lipid content, and liver injury, as evidenced by a pronounced decrease in serum levels of liver transaminases. Moreover, animals supplemented with the MI cocktail showed a reduction in the gene expression of some proinflammatory cytokines when compared with their HFHFr counterparts. In addition, MI supplementation was effective in decreasing hepatic fibrosis and improving insulin sensitivity, as observed by histological analysis, as well as a reduction in fibrotic gene expression (Col1α1) and improved Akt activation, respectively. Taken together, supplementation with this specific combination of metabolic cofactors ameliorates several features of NAFLD, highlighting this treatment as a potential efficient therapy against this disease in humans.
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Affiliation(s)
- Sergio Quesada-Vázquez
- Eurecat, Technology Centre of Catalunya, Nutrition and Health Unit, 43204 Reus, Spain; (S.Q.-V.); (J.M.D.B.)
| | - Marina Colom-Pellicer
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (È.N.-M.); (G.A.)
| | - Èlia Navarro-Masip
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (È.N.-M.); (G.A.)
| | - Gerard Aragonès
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007 Tarragona, Spain; (M.C.-P.); (È.N.-M.); (G.A.)
| | - Josep M. Del Bas
- Eurecat, Technology Centre of Catalunya, Nutrition and Health Unit, 43204 Reus, Spain; (S.Q.-V.); (J.M.D.B.)
| | - Antoni Caimari
- Eurecat, Centre Tecnològic de Catalunya, Biotechnology Area, 43204 Reus, Spain;
| | - Xavier Escoté
- Eurecat, Technology Centre of Catalunya, Nutrition and Health Unit, 43204 Reus, Spain; (S.Q.-V.); (J.M.D.B.)
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Saneian H, Khalilian L, Heidari-Beni M, Khademian M, Famouri F, Nasri P, Hassanzadeh A, Kelishadi R. Effect of l-carnitine supplementation on children and adolescents with nonalcoholic fatty liver disease (NAFLD): a randomized, triple-blind, placebo-controlled clinical trial. J Pediatr Endocrinol Metab 2021; 34:897-904. [PMID: 33939897 DOI: 10.1515/jpem-2020-0642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 04/03/2021] [Indexed: 02/04/2023]
Abstract
OBJECTIVES Nonalcoholic fatty liver disease (NAFLD) is one of the most common liver diseases in the pediatric population at global level. Present study aims to assess the effect of l-carnitine supplementation on the NAFLD in children and adolescents. METHODS This randomized, triple-blind, placebo-controlled clinical trial was conducted in 2018-2019. Study was carried out in NAFLD participants (5-15 years). They were randomly assigned to receive either 50 mg/kg/day l-carnitine twice a day or identical placebo per day for three months. Liver enzymes and liver ultrasonography were assessed before and after the intervention. Both groups received similar consultation for lifestyle changes. RESULTS Overall, 55 participants completed the study, 30 patients in the l-carnitine group and 25 patients in placebo group. Mean changes of anthropometric measurements did not have significant differences between groups (p>0.05). No significant differences in the mean changes of aspartate aminotransferase (AST) (p=0.82) and alanine aminotransferase (ALT) (p=0.76) levels were documented between two groups. Based on within-group analysis, there were significant changes in AST and ALT levels before and after the intervention in both groups. The sonographic grades of fatty liver were not significantly different between two groups before (p=0.94) and after intervention (p=0.93). CONCLUSIONS In the present clinical trial, L-carnitine did not have significant effect on improving biochemical and sonographic markers of NAFLD in children and adolescents. Future studies are necessary to evaluate the applicability and efficacy of long-term l-carnitine supplementation to treatment of NAFLD in pediatric population. TRIAL REGISTRATION IRCT20170628034786N2.
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Affiliation(s)
- Hossein Saneian
- Department of Pediatrics, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Leila Khalilian
- Department of Pediatrics, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Motahar Heidari-Beni
- Department of Nutrition, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Majid Khademian
- Department of Pediatrics, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Famouri
- Department of Pediatrics, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Peyman Nasri
- Department of Pediatrics, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Akbar Hassanzadeh
- Department of Statistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Roya Kelishadi
- Department of Pediatrics, Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
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Al-Saeedi FJ, Al-Waheeb SK, Rajendran P, Khan KM, Sadan M. Early initiation of insulin attenuates histological and functional changes in the liver of streptozotocin-induced diabetic rats using 99mTc-sulfur colloid functional imaging. J Recept Signal Transduct Res 2021; 42:261-267. [PMID: 33853491 DOI: 10.1080/10799893.2021.1912097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study aimed to investigate the effect of insulin on the reticuloendothelial system (RES) in the liver and spleen in diabetic rats. Sprague Dawley rats were divided into control, diabetic rats (DM) and diabetic rats treated with insulin (IDM) for 2 weeks. Rats were imaged with technetium-99m-sulfur colloid (99mTc-SC) tracer to determine regional distributions of the tracer for all groups by drawing regions of interest and then obtained the ratios as the cumulative counts of heart, liver, and spleen to the whole body (WB). Liver tissue from sacrificed rats from each group was examined by light and electron microscopy. 99mTc-SC uptake ratios showed a lower liver to WB uptake ratio in the DM rats compared to both controls and IDM rats. Electron microscopy showed severe vacuolization of the hepatocytes of DM rats. The IDM rats show complete resolution of the vacuolization. The early administration of insulin for 2 weeks to diabetic rats could significantly resolve the phagocytic RES function and histological changes in the liver.
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Affiliation(s)
- Fatma J Al-Saeedi
- Department of Nuclear Medicine, Faculty of Medicine, Kuwait University, Kuwait city, Kuwait
| | - Salah Kh Al-Waheeb
- Department of Pathology, Faculty of Medicine, Kuwait University, Kuwait city, Kuwait
| | - Peramaiyan Rajendran
- Department of Biological Sciences, College of Science, King Faisal University, Al Ahsa, Saudi Arabia
| | - Khalid M Khan
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait city, Kuwait
| | - Moudhi Sadan
- Royal College of Surgeons in Ireland, Dublin, Ireland
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12
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Zhao HY, Li HY, Jin J, Jin JZ, Zhang LY, Xuan MY, Jin XM, Jiang YJ, Zheng HL, Jin YS, Jin YJ, Choi BS, Yang CW, Piao SG, Li C. L-carnitine treatment attenuates renal tubulointerstitial fibrosis induced by unilateral ureteral obstruction. Korean J Intern Med 2021; 36:S180-S195. [PMID: 32942841 PMCID: PMC8009152 DOI: 10.3904/kjim.2019.413] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/05/2020] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND/AIMS Accumulating evidence indicates that L-carnitine (LC) protects against multiorgan damage through its antioxidant properties and preservation of the mitochondria. Little information is available about the effects of LC on renal fibrosis. This study examined whether LC treatment would provide renoprotection in a rat model of unilateral ureteral obstruction (UUO) and in vitro. METHODS Sprague-Dawley rats that underwent UUO were treated daily with LC for 7 or 14 days. The influence of LC on renal injury caused by UUO was evaluated by histopathology, and analysis of gene expression, oxidative stress, mitochondrial function, programmed cell death, and phosphatidylinositol 3-kinase (PI3K)/ AKT/forkhead box protein O 1a (FoxO1a) signaling. In addition, H2O2-exposed human kidney cells (HK-2) were treated with LC. RESULTS LC treatment inhibited expression of proinflammatory and profibrotic cytokines, and was followed by a significant attenuation of tubulointerstitial inflammation and fibrosis. The increased oxidative stress caused by UUO was associated with mitochondrial dysfunction and excessive apoptosis and autophagy via PI3K/AKT/FoxO1a-dependent signaling, and this was abrogated by administration of LC. In H2O2-exposed HK-2 cells, LC decreased intracellular production of reactive oxygen species, and suppressed expression of profibrotic cytokines and reduced the number of apoptotic cells. CONCLUSION LC protects against the progression of tubulointerstitial fibrosis in an obstructed kidney.
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Affiliation(s)
- Hai Yan Zhao
- Department of Nephrology, Yanbian University Hospital, Yanji, China
- Health Examination Center, Yanbian University Hospital, Yanji, China
- Postdoctoral Research Institute, Yanbian University Hospital, Yanji, China
| | - Hui Ying Li
- Department of Nephrology, Yanbian University Hospital, Yanji, China
- Postdoctoral Research Institute, Yanbian University Hospital, Yanji, China
| | - Jian Jin
- Department of Nephrology, Yanbian University Hospital, Yanji, China
| | - Ji Zhe Jin
- Department of Nephrology, Yanbian University Hospital, Yanji, China
| | - Long Ye Zhang
- Department of Nephrology, Yanbian University Hospital, Yanji, China
| | - Mei Ying Xuan
- Health Examination Center, Yanbian University Hospital, Yanji, China
| | - Xue Mei Jin
- Department of Pathology, Yanbian University Hospital, Yanji, China
| | - Yu Ji Jiang
- Department of Nephrology, Yanbian University Hospital, Yanji, China
| | - Hai Lan Zheng
- Department of Nephrology, Yanbian University Hospital, Yanji, China
| | - Ying Shun Jin
- Department of Nephrology, Yanbian University Hospital, Yanji, China
| | - Yong Jie Jin
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Bum Soon Choi
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chul Woo Yang
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Shang Guo Piao
- Department of Nephrology, Yanbian University Hospital, Yanji, China
- Correspondence to Shang Guo Piao, M.D. Department of Nephrology, Yanbian University Hospital, #1327 Juzi St., Yanji 133000, China Tel: +86-155-2677-0987 Fax: +86-433-251-3610 E-mail:
| | - Can Li
- Department of Nephrology, Yanbian University Hospital, Yanji, China
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13
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Arroyave-Ospina JC, Wu Z, Geng Y, Moshage H. Role of Oxidative Stress in the Pathogenesis of Non-Alcoholic Fatty Liver Disease: Implications for Prevention and Therapy. Antioxidants (Basel) 2021; 10:antiox10020174. [PMID: 33530432 PMCID: PMC7911109 DOI: 10.3390/antiox10020174] [Citation(s) in RCA: 192] [Impact Index Per Article: 64.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 02/07/2023] Open
Abstract
Oxidative stress (OxS) is considered a major factor in the pathophysiology of inflammatory chronic liver diseases, including non-alcoholic liver disease (NAFLD). Chronic impairment of lipid metabolism is closely related to alterations of the oxidant/antioxidant balance, which affect metabolism-related organelles, leading to cellular lipotoxicity, lipid peroxidation, chronic endoplasmic reticulum (ER) stress, and mitochondrial dysfunction. Increased OxS also triggers hepatocytes stress pathways, leading to inflammation and fibrogenesis, contributing to the progression of non-alcoholic steatohepatitis (NASH). The antioxidant response, regulated by the Nrf2/ARE pathway, is a key component in this process and counteracts oxidative stress-induced damage, contributing to the restoration of normal lipid metabolism. Therefore, modulation of the antioxidant response emerges as an interesting target to prevent NAFLD development and progression. This review highlights the link between disturbed lipid metabolism and oxidative stress in the context of NAFLD. In addition, emerging potential therapies based on antioxidant effects and their likely molecular targets are discussed.
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14
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Vincent RK, Williams DM, Evans M. A look to the future in non-alcoholic fatty liver disease: Are glucagon-like peptide-1 analogues or sodium-glucose co-transporter-2 inhibitors the answer? Diabetes Obes Metab 2020; 22:2227-2240. [PMID: 32945071 DOI: 10.1111/dom.14196] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/19/2020] [Accepted: 09/03/2020] [Indexed: 12/18/2022]
Abstract
The increasing prevalence of diabetes and non-alcoholic fatty liver disease (NAFLD) is a growing public health concern associated with significant morbidity, mortality and economic cost, particularly in those who progress to cirrhosis. Medical treatment is frequently limited, with no specific licensed treatments currently available for people with NAFLD. Its association with diabetes raises the possibility of shared mechanisms of disease progression and treatment. With the ever-growing interest in the non-glycaemic effects of diabetes medications, studies and clinical trials have investigated hepatic outcomes associated with the use of drug classes used for people with type 2 diabetes (T2D), such as glucagon-like peptide-1 (GLP-1) analogues or sodium-glucose co-transporter-2 (SGLT2) inhibitors. Studies exploring the use of GLP-1 analogues or SGLT2 inhibitors in people with NAFLD have observed improved measures of hepatic inflammation, liver enzymes and radiological features over short periods. However, these studies tend to have variable study populations and inconsistent reported outcomes, limiting comparison between drugs and drug classes. As these drugs appear to improve biomarkers of NAFLD, clinicians should consider their use in patients with NAFLD and T2D. However, further evidence with greater participant numbers and longer trial durations is required to support specific licensing for people with NAFLD. Larger trials would allow reporting of major adverse hepatic events, akin to cardiovascular and renal outcome trials, to be determined. This would provide a more meaningful evaluation of the impact of these drugs in NAFLD. Nevertheless, these drugs represent a future potential therapeutic avenue in this difficult-to-treat population and may beget significant health and economic impacts.
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Affiliation(s)
- Rebecca K Vincent
- Department of Gastroenterology, University Hospital Llandough, Cardiff, UK
| | - David M Williams
- Department of Diabetes and Endocrinology, University Hospital Llandough, Cardiff, UK
| | - Marc Evans
- Department of Diabetes and Endocrinology, University Hospital Llandough, Cardiff, UK
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15
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Savic D, Hodson L, Neubauer S, Pavlides M. The Importance of the Fatty Acid Transporter L-Carnitine in Non-Alcoholic Fatty Liver Disease (NAFLD). Nutrients 2020; 12:E2178. [PMID: 32708036 PMCID: PMC7469009 DOI: 10.3390/nu12082178] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 12/16/2022] Open
Abstract
L-carnitine transports fatty acids into the mitochondria for oxidation and also buffers excess acetyl-CoA away from the mitochondria. Thus, L-carnitine may play a key role in maintaining liver function, by its effect on lipid metabolism. The importance of L-carnitine in liver health is supported by the observation that patients with primary carnitine deficiency (PCD) can present with fatty liver disease, which could be due to low levels of intrahepatic and serum levels of L-carnitine. Furthermore, studies suggest that supplementation with L-carnitine may reduce liver fat and the liver enzymes alanine aminotransferase (ALT) and aspartate transaminase (AST) in patients with Non-Alcoholic Fatty Liver Disease (NAFLD). L-carnitine has also been shown to improve insulin sensitivity and elevate pyruvate dehydrogenase (PDH) flux. Studies that show reduced intrahepatic fat and reduced liver enzymes after L-carnitine supplementation suggest that L-carnitine might be a promising supplement to improve or delay the progression of NAFLD.
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Affiliation(s)
- Dragana Savic
- Radcliffe Department of Medicine, Oxford Centre for Magnetic Resonance Research, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK; (S.N.); (M.P.)
| | - Leanne Hodson
- Radcliffe Department of Medicine, Oxford Centre for Diabetes, Endocrinology & Metabolism, Churchill Hospital, University of Oxford, Oxford OX3 7LE, UK;
- Oxford NIHR Biomedical Research Centre, University of Oxford, Oxford OX3 7LE, UK
| | - Stefan Neubauer
- Radcliffe Department of Medicine, Oxford Centre for Magnetic Resonance Research, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK; (S.N.); (M.P.)
| | - Michael Pavlides
- Radcliffe Department of Medicine, Oxford Centre for Magnetic Resonance Research, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK; (S.N.); (M.P.)
- Oxford NIHR Biomedical Research Centre, University of Oxford, Oxford OX3 7LE, UK
- Translational Gastroenterology Unit, University of Oxford, Oxford OX3 9DU, UK
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16
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Liu Y, Chen X, Qu Y, Song L, Lin Q, Li M, Su K, Li Y, Dong J. Central nesfatin-1 activates lipid mobilization in adipose tissue and fatty acid oxidation in muscle via the sympathetic nervous system. Biofactors 2020; 46:454-464. [PMID: 31898375 DOI: 10.1002/biof.1600] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 12/09/2019] [Indexed: 01/14/2023]
Abstract
Little is known about the influence of central nesfatin-1 on lipid metabolism under diabetic conditions. The main objective of this study was to characterize the mechanisms by which central nesfatin-1 regulates lipid metabolism in streptozotocin (STZ)-induced type 2 diabetes mellitus (T2DM) and whether the sympathetic nervous system is involved. Male Kunming mice were fed high-fat diets (HFDs) and were treated twice with low-dose STZ (100 mg/kg, intraperitoneal [IP]) to generate the T2DM model. Pharmacological adrenergic blockage (phentolamine 10 mg/kg, propranolol 0.017 mmol) and surgical denervation of sympathetic nervous system of the hindlimb and inguinal fat were used to block nerve conduction to determine whether the effect of central nesfatin-1 required the hypothalamic-sympathetic nervous system axis. Plasma free fatty acid (FFA) and insulin levels were measured. AMP-activated protein kinase (AMPK) levels in skeletal muscle and hormone-sensitive lipase and adipose triglycerides lipase (HSL/ATGL) levels in white adipose tissue (WAT) were measured using western blot. mRNA expression of AMPK was measured. We found that there were significantly fewer NUCB2/nesfatin-1 immunoreactive neurons in the paraventricular nucleus (PVN) and supraoptic nucleus (SON) in T2DM mice. Central nesfatin-1 administration decreased levels of plasma FFA significantly and activated AMPK to enhance fatty-acid oxidation in skeletal muscle in T2DM mice. In addition, HSL and ATGL were significantly activated during triglyceride mobilization in WAT triggered by central nesfatin-1 administration. Adrenergic blockade and morphological denervation of the sciatic and femoral nerves reduced these changes. Taken together, these data suggest that central nesfatin-1 regulates peripheral lipid metabolism in type 2 diabetes via the sympathetic nervous system.
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Affiliation(s)
- Yuan Liu
- Special Medicine Department, Basic Medical College, Qingdao University, Qingdao, China
| | - Xi Chen
- Physiology Department, Basic Medical College, Qingdao University, Qingdao, China
| | - Yan Qu
- Physiology Department, Basic Medical College, Qingdao University, Qingdao, China
| | - Limin Song
- Special Medicine Department, Basic Medical College, Qingdao University, Qingdao, China
| | - Qian Lin
- Special Medicine Department, Basic Medical College, Qingdao University, Qingdao, China
| | - Manwen Li
- Special Medicine Department, Basic Medical College, Qingdao University, Qingdao, China
| | - Kaizhen Su
- Clinical medicine, Medical College, Qingdao University, Qingdao, China
| | - Yanrun Li
- Clinical medicine, Medical College, Qingdao University, Qingdao, China
| | - Jing Dong
- Special Medicine Department, Basic Medical College, Qingdao University, Qingdao, China
- Physiology Department, Basic Medical College, Qingdao University, Qingdao, China
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17
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Yuan J, Jiang Q, Song L, Liu Y, Li M, Lin Q, Li Y, Su K, Ma Z, Wang Y, Liu D, Dong J. L-Carnitine Is Involved in Hyperbaric Oxygen-Mediated Therapeutic Effects in High Fat Diet-Induced Lipid Metabolism Dysfunction. Molecules 2020; 25:molecules25010176. [PMID: 31906305 PMCID: PMC6982999 DOI: 10.3390/molecules25010176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/14/2019] [Accepted: 12/25/2019] [Indexed: 11/16/2022] Open
Abstract
Lipid metabolism dysfunction and obesity are serious health issues to human beings. The current study investigated the effects of hyperbaric oxygen (HBO) against high fat diet (HFD)-induced lipid metabolism dysfunction and the roles of L-carnitine. C57/B6 mice were fed with HFD or normal chew diet, with or without HBO treatment. Histopathological methods were used to assess the adipose tissues, serum free fatty acid (FFA) levels were assessed with enzymatic methods, and the endogenous circulation and skeletal muscle L-carnitine levels were assessed with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Additionally, western blotting was used to assess the expression levels of PPARα, CPT1b, pHSL/HSL, and UCP1. HFD treatment increased body/adipose tissue weight, serum FFA levels, circulation L-carnitines and decreased skeletal muscle L-carnitine levels, while HBO treatment alleviated such changes. Moreover, HFD treatment increased fatty acid deposition in adipose tissues and decreased the expression of HSL, while HBO treatment alleviated such changes. Additionally, HFD treatment decreased the expression levels of PPARα and increased those of CPT1b in skeletal muscle, while HBO treatment effectively reverted such changes as well. In brown adipose tissues, HFD increased the expression of UCP1 and the phosphorylation of HSL, which was abolished by HBO treatment as well. In summary, HBO treatment may alleviate HFD-induced fatty acid metabolism dysfunction in C57/B6 mice, which seems to be associated with circulation and skeletal muscle L-carnitine levels and PPARα expression.
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Affiliation(s)
- Junhua Yuan
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Qixiao Jiang
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao 266071, China
- Correspondence: (Q.J.); (J.D.); Tel.: +86-18300267138 (Q.J.); +86-0532-83780035 (J.D.)
| | - Limin Song
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Yuan Liu
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Manwen Li
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Qian Lin
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Yanrun Li
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Kaizhen Su
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Zhengye Ma
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Yifei Wang
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Defeng Liu
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Jing Dong
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
- Department of Physiology, School of Basic Medicine, Qingdao University, Qingdao 266071, China
- Correspondence: (Q.J.); (J.D.); Tel.: +86-18300267138 (Q.J.); +86-0532-83780035 (J.D.)
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18
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Yang H, Yang T, Heng C, Zhou Y, Jiang Z, Qian X, Du L, Mao S, Yin X, Lu Q. Quercetin improves nonalcoholic fatty liver by ameliorating inflammation, oxidative stress, and lipid metabolism in db/db mice. Phytother Res 2019; 33:3140-3152. [PMID: 31452288 DOI: 10.1002/ptr.6486] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 08/02/2019] [Accepted: 08/06/2019] [Indexed: 12/18/2022]
Abstract
Multiphase pathological processes involve in Type 2 diabetes (T2DM)-induced nonalcoholic fatty liver disease (NAFLD). However, the therapies are quite limited. In the present study, the hepatoprotective effects and underlying mechanisms of quercetin in T2DM-induced NAFLD were investigated. T2DM-induced NAFLD and quercetin treatment models were established in vivo and in vitro. The results revealed that quercetin alleviated serum transaminase levels and markedly reduced T2DM-induced histological alterations of livers. Additionally, quercetin restored superoxide dismutase, catalase, and glutathione content in livers. Not only that, quercetin markedly attenuated T2DM-induced production of interleukin 1 beta, interleukin 6, and TNF-α. Accompanied by the restoration of the increased serum total bile acid (p = .0001) and the decreased liver total bile acid (p = .0005), quercetin could reduce lipid accumulation in the liver of db/db mice. Further mechanism studies showed that farnesoid X receptor 1/Takeda G-protein-coupled receptor 5 signaling pathways was involved in quercetin regulation of lipid metabolism in T2DM-induced NAFLD. In high D-glucose and free fatty acid cocultured HepG2 cells model, quercetin eliminated lipid droplets and restored the upregulated total cholesterol and triglyceride levels. Similar to the findings in mice, quercetin could also activate farnesoid X receptor 1/Takeda G-protein-coupled receptor 5 signaling pathway. These findings suggested that quercetin might be a potentially effective drug for the treatment of T2DM-induced NAFLD.
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Affiliation(s)
- Hao Yang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Tingting Yang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Cai Heng
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Yi Zhou
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Zhenzhou Jiang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China
| | - Xuan Qian
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Lei Du
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Shiyu Mao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Xiaoxing Yin
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Qian Lu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
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19
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Characteristics of Selected Antioxidative and Bioactive Compounds in Meat and Animal Origin Products. Antioxidants (Basel) 2019; 8:antiox8090335. [PMID: 31443517 PMCID: PMC6769838 DOI: 10.3390/antiox8090335] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/11/2019] [Accepted: 08/19/2019] [Indexed: 01/15/2023] Open
Abstract
Meat and meat products have a high nutritional value. Besides major components, meat is rich in bioactive components, primarily taurine, l-carnitine, choline, alpha-lipoic acid, conjugated linoleic acid, glutathione, creatine, coenzyme Q10 and bioactive peptides. Many studies have reported their antioxidant and health-promoting properties connected with their lipid-lowering, antihypertensive, anti-inflammatory, immunomodulatory activity and protecting the organism against oxidative stress. The antioxidant activity of meat components results, among others, from the capability of scavenging reactive oxygen and nitrogen species, forming complexes with metal ions and protecting cells against damage. This review is focused to gather accurate information about meat components with antioxidant and biological activity.
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20
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Wang R, Wang L, Zhang C, Zhang Y, Liu Y, Song L, Ma R, Dong J. L-carnitine ameliorates peripheral neuropathy in diabetic mice with a corresponding increase in insulin‑like growth factor‑1 level. Mol Med Rep 2018; 19:743-751. [PMID: 30431101 DOI: 10.3892/mmr.2018.9647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 10/22/2018] [Indexed: 11/05/2022] Open
Abstract
Diabetic peripheral neuropathy (DPN) is one of the common complications in diabetes, affecting more than half of patients with diabetes. L‑carnitine (LC) was recently demonstrated to serve a positive role in ameliorating DPN. Therefore, the aim of the present study was to investigate the underlying mechanisms of LC in ameliorating DPN. Male Kunming mice were randomly assigned into five groups, including the control group, diabetes mellitus group, pre‑treatment group, treatment group and post‑treatment group. Type 2 diabetes was induced in mice using a combination of high‑fat diet and streptozotocin injection. Subsequently, peripheral neuropathy was measured and the levels of LC, insulin and insulin‑like growth factor‑1 (IGF‑1) were detected. When diabetic mice were treated with LC, the levels of IGF‑1 in the plasma and pancreas were increased. In addition, hyperalgesia, as determined by the tail‑flick test as well as food intake, body weight and blood glucose levels were decreased. An amelioration of demyelination, axonal atrophy and mitochondria swelling in the nerve fibres of diabetic mice was also observed. The present study demonstrated that LC ameliorated peripheral neuropathy in type 2 diabetic mice and the effect of LC may in part be mediated by an increase in local and circulatory IGF‑1 levels.
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Affiliation(s)
- Rui Wang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Liuxin Wang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Caishun Zhang
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Yan Zhang
- Department of Nephrology, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Yuan Liu
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Limin Song
- Department of Special Medicine, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Ruixia Ma
- Department of Nephrology, Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, P.R. China
| | - Jing Dong
- Department of Physiology, Medical College, Qingdao University, Qingdao, Shandong 266071, P.R. China
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21
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Smith RL, Soeters MR, Wüst RCI, Houtkooper RH. Metabolic Flexibility as an Adaptation to Energy Resources and Requirements in Health and Disease. Endocr Rev 2018; 39:489-517. [PMID: 29697773 PMCID: PMC6093334 DOI: 10.1210/er.2017-00211] [Citation(s) in RCA: 332] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 04/19/2018] [Indexed: 12/15/2022]
Abstract
The ability to efficiently adapt metabolism by substrate sensing, trafficking, storage, and utilization, dependent on availability and requirement, is known as metabolic flexibility. In this review, we discuss the breadth and depth of metabolic flexibility and its impact on health and disease. Metabolic flexibility is essential to maintain energy homeostasis in times of either caloric excess or caloric restriction, and in times of either low or high energy demand, such as during exercise. The liver, adipose tissue, and muscle govern systemic metabolic flexibility and manage nutrient sensing, uptake, transport, storage, and expenditure by communication via endocrine cues. At a molecular level, metabolic flexibility relies on the configuration of metabolic pathways, which are regulated by key metabolic enzymes and transcription factors, many of which interact closely with the mitochondria. Disrupted metabolic flexibility, or metabolic inflexibility, however, is associated with many pathological conditions including metabolic syndrome, type 2 diabetes mellitus, and cancer. Multiple factors such as dietary composition and feeding frequency, exercise training, and use of pharmacological compounds, influence metabolic flexibility and will be discussed here. Last, we outline important advances in metabolic flexibility research and discuss medical horizons and translational aspects.
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Affiliation(s)
- Reuben L Smith
- Laboratory of Genetic Metabolic Diseases, Academic Medical Center, AZ Amsterdam, Netherlands.,Amsterdam Gastroenterology and Metabolism, Academic Medical Center, AZ Amsterdam, Netherlands
| | - Maarten R Soeters
- Amsterdam Gastroenterology and Metabolism, Academic Medical Center, AZ Amsterdam, Netherlands.,Department of Endocrinology and Metabolism, Internal Medicine, Academic Medical Center, AZ Amsterdam, Netherlands
| | - Rob C I Wüst
- Laboratory of Genetic Metabolic Diseases, Academic Medical Center, AZ Amsterdam, Netherlands.,Amsterdam Cardiovascular Sciences, Academic Medical Center, AZ Amsterdam, Netherlands.,Amsterdam Movement Sciences, Academic Medical Center, AZ Amsterdam, Netherlands
| | - Riekelt H Houtkooper
- Laboratory of Genetic Metabolic Diseases, Academic Medical Center, AZ Amsterdam, Netherlands.,Amsterdam Gastroenterology and Metabolism, Academic Medical Center, AZ Amsterdam, Netherlands.,Amsterdam Cardiovascular Sciences, Academic Medical Center, AZ Amsterdam, Netherlands
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Effects of Lactobacillus on Mice with Diabetes Induced by High-Fat Diet with Streptozotocin (STZ). APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8081249] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This study aimed to evaluate and compare the effects of heat-killed and live Lactobacillus on mice with diabetes induced by high-fat diet with streptozotocin (STZ). Results based on body weight and liver pathological changes, oral glucose tolerance test, and related serum index (AST (aspartate aminotransferase), ALT (alanine aminotransferase), MDA (malondialdehyde), TNF-α (tumor necrosis factor α), INS (insulin), and GC (glucagon) and gene expression of IL-1β (Interleukin 1β), IRS-1(Insulin receptor substrate 1), GLUT-4 (glucose transporter type 4), PPARγ (peroxisome proliferators-activated receptor γ), and SREBP-1c (sterol-regulatory element-binding protein-1c) levels indicated that Lactobacillus fermentum (LF) and Lactobacillus plantarum (LP) could increase the average weight, alleviate the degree of damage in the liver, and improve the glucose tolerance of mice with diabetes. LF and LP also participated in the downregulation of AST, ALT, MDA, TNF-α, INS, and GC in serum, as well as the inhibition of IL-1β, TNF-α, IRS-1, GLUT-4, PPARγ, and SREBP-1c expression. These regulating effects were remarkable, and the regulating effect of the live group was significantly better than that of the heat-killed group. This study suggested that LF and LP can significantly alleviate liver damage and hepatic insulin resistance in mice with diabetes and that the acting mechanisms of LF and LP were related to cellular components and their activities.
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Effect of L-carnitine administration on serum insulin and adiponectin levels, and AMPK, APPL1 and PPAR? gene expression in STZ-induced diabetic rat liver. UKRAINIAN BIOCHEMICAL JOURNAL 2017. [DOI: 10.15407/ubj89.06.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Evaluation of the effects of L-carnitine on medaka (Oryzias latipes) fatty liver. Sci Rep 2017; 7:2749. [PMID: 28584294 PMCID: PMC5459862 DOI: 10.1038/s41598-017-02924-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 04/19/2017] [Indexed: 12/21/2022] Open
Abstract
Lifestyle-related diseases have become a major issue in recent years. The increasing incidence of fatty liver underlines the urgency with which the issues of non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH) need to be addressed. L-carnitine is a compound known to transport fatty acids into the mitochondria to enhance β-oxidation-mediated metabolism of fats. In this study, the effects of L-carnitine administration on fatty liver of medaka (Oryzias latipes) were analysed, to check for disease improvement and metabolic changes. Additionally, the effects of the concomitant administration of L-carnitine and eicosapentaenoic acid (20:5n-3) (EPA) were investigated. Findings indicated reduced lipid deposition, increase in metabolites associated with β-oxidation, and significant reduction in fatty acid levels in the liver, implying improvement in fatty liver condition. Concomitant administration of L-carnitine and EPA resulted in further benefits, via changes in fatty acid composition in the medaka fatty liver model.
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Banan B, Watson R, Xu M, Lin Y, Chapman W. Development of a normothermic extracorporeal liver perfusion system toward improving viability and function of human extended criteria donor livers. Liver Transpl 2016; 22:979-93. [PMID: 27027254 DOI: 10.1002/lt.24451] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 03/08/2016] [Accepted: 03/21/2016] [Indexed: 12/23/2022]
Abstract
Donor organ shortages have led to an increased interest in finding new approaches to recover organs from extended criteria donors (ECD). Normothermic extracorporeal liver perfusion (NELP) has been proposed as a superior preservation method to reduce ischemia/reperfusion injury (IRI), precondition suboptimal grafts, and treat ECD livers so that they can be successfully used for transplantation. The aim of this study was to investigate the beneficial effects of a modified NELP circuit on discarded human livers. Seven human livers that were rejected for transplantation were placed on a modified NELP circuit for 8 hours. Perfusate samples and needle core biopsies were obtained at hourly intervals. A defatting solution that contained exendin-4 (50 nM) and L-carnitine (10 mM) was added to the perfusate for 2 steatotic livers. NELP provided normal temperature, electrolytes, and pH and glucose levels in the perfusate along with physiological vascular flows and pressures. Functional, biochemical, and microscopic evaluation revealed no additional injuries to the grafts during NELP with an improved oxygen extraction ratio (>0.5) and stabilized markers of hepatic injury. All livers synthesized adequate amounts of bile and coagulation factors. We also demonstrated a mild reduction (10%) of macroglobular steatosis with the use of the defatting solution. Histology demonstrated normal parenchymal architecture and a minimal to complete lack of IRI at the end of NELP. In conclusion, a modified NELP circuit preserved hepatocyte architecture, recovered synthetic functions, and hepatobiliary parameters of ECD livers without additional injuries to the grafts. This approach has the potential to increase the donor pool for clinical transplantation. Liver Transplantation 22 979-993 2016 AASLD.
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Affiliation(s)
- Babak Banan
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Rao Watson
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO.,Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Min Xu
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Yiing Lin
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
| | - William Chapman
- Departments of Surgery, Washington University School of Medicine, St. Louis, MO
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Pedersen BA, Wang W, Taylor JF, Khattab OS, Chen YH, Edwards RA, Yazdi PG, Wang PH. Hepatic proteomic analysis revealed altered metabolic pathways in insulin resistant Akt1(+/-)/Akt2(-/-) mice. Metabolism 2015; 64:1694-703. [PMID: 26455965 PMCID: PMC4641788 DOI: 10.1016/j.metabol.2015.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 08/19/2015] [Accepted: 09/08/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The aim of this study was to identify liver proteome changes in a mouse model of severe insulin resistance and markedly decreased leptin levels. METHODS Two-dimensional differential gel electrophoresis was utilized to identify liver proteome changes in AKT1(+/-)/AKT2(-/-) mice. Proteins with altered levels were identified with tandem mass spectrometry. Ingenuity Pathway Analysis was performed for the interpretation of the biological significance of the observed proteomic changes. RESULTS 11 proteins were identified from 2 biological replicates to be differentially expressed by a ratio of at least 1.3 between age-matched insulin resistant (Akt1(+/-)/Akt2(-/-)) and wild type mice. Albumin and mitochondrial ornithine aminotransferase were detected from multiple spots, which suggest post-translational modifications. Enzymes of the urea cycle were common members of top regulated pathways. CONCLUSION Our results help to unveil the regulation of the liver proteome underlying altered metabolism in an animal model of severe insulin resistance.
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Affiliation(s)
- Brian A Pedersen
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
- Department of Medicine, University of California at Irvine, Irvine, CA 92697, USA
| | - Weiwen Wang
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
- Department of Medicine, University of California at Irvine, Irvine, CA 92697, USA
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Miami, FL, 33136
| | - Jared F Taylor
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
- Department of Medicine, University of California at Irvine, Irvine, CA 92697, USA
| | - Omar S Khattab
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
| | - Yu-Han Chen
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
- Department of Physiology & Biophysics, University of California at Irvine, Irvine, CA 92697, USA
| | - Robert A Edwards
- Department of Pathology, University of California at Irvine, Irvine, CA 92697, USA
| | - Puya G Yazdi
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
- Department of Medicine, University of California at Irvine, Irvine, CA 92697, USA
| | - Ping H Wang
- UC Irvine Diabetes Center, University of California at Irvine, Irvine, CA 92697, USA
- Sue and Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, CA 92697, USA
- Department of Medicine, University of California at Irvine, Irvine, CA 92697, USA
- Department of Biological Chemistry, University of California at Irvine, Irvine, CA 92697, USA
- Department of Physiology & Biophysics, University of California at Irvine, Irvine, CA 92697, USA
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Morigi M, Perico L, Rota C, Longaretti L, Conti S, Rottoli D, Novelli R, Remuzzi G, Benigni A. Sirtuin 3-dependent mitochondrial dynamic improvements protect against acute kidney injury. J Clin Invest 2015; 125:715-26. [PMID: 25607838 DOI: 10.1172/jci77632] [Citation(s) in RCA: 304] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 12/10/2014] [Indexed: 12/31/2022] Open
Abstract
Acute kidney injury (AKI) is a public health concern with an annual mortality rate that exceeds those of breast and prostate cancer, heart failure, and diabetes combined. Oxidative stress and mitochondrial damage are drivers of AKI-associated pathology; however, the pathways that mediate these events are poorly defined. Here, using a murine cisplatin-induced AKI model, we determined that both oxidative stress and mitochondrial damage are associated with reduced levels of renal sirtuin 3 (SIRT3). Treatment with the AMPK agonist AICAR or the antioxidant agent acetyl-l-carnitine (ALCAR) restored SIRT3 expression and activity, improved renal function, and decreased tubular injury in WT animals, but had no effect in Sirt3-/- mice. Moreover, Sirt3-deficient mice given cisplatin experienced more severe AKI than WT animals and died, and neither AICAR nor ALCAR treatment prevented death in Sirt3-/- AKI mice. In cultured human tubular cells, cisplatin reduced SIRT3, resulting in mitochondrial fragmentation, while restoration of SIRT3 with AICAR and ALCAR improved cisplatin-induced mitochondrial dysfunction. Together, our results indicate that SIRT3 is protective against AKI and suggest that enhancing SIRT3 to improve mitochondrial dynamics has potential as a strategy for improving outcomes of renal injury.
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Jayanthy G, Subramanian S. RA abrogates hepatic gluconeogenesis and insulin resistance by enhancing IRS-1 and AMPK signalling in experimental type 2 diabetes. RSC Adv 2015. [DOI: 10.1039/c5ra04605j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
RA abrogates hyperglycemia and insulin resistance, the primary features of type 2 diabetes (T2DM).
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Affiliation(s)
- G. Jayanthy
- Department of Biochemistry
- University of Madras
- Guindy Campus
- Chennai
- India
| | - S. Subramanian
- Department of Biochemistry
- University of Madras
- Guindy Campus
- Chennai
- India
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Wu T, Guo A, Shu Q, Qi Y, Kong Y, Sun Z, Sun S, Fu Z. L-Carnitine intake prevents irregular feeding-induced obesity and lipid metabolism disorder. Gene 2014; 554:148-54. [PMID: 25445284 DOI: 10.1016/j.gene.2014.10.040] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 10/20/2014] [Accepted: 10/23/2014] [Indexed: 01/07/2023]
Abstract
L-Carnitine supplementation has been used to reduce obesity caused by high-fat diet, which is beneficial for lowering blood and hepatic lipid levels, and for ameliorating fatty liver. However, whether l-carnitine may affect irregular feeding-induced obesity and lipid metabolism disorder is still largely unknown. In the present study, we developed a time-delayed pattern of eating, and investigated the effects of l-carnitine on the irregular eating induced adiposity in mice. After an experimental period of 8 weeks with l-carnitine supplementation, l-carnitine significantly inhibited body weight increase and epididymal fat weight gain induced by the time-delayed feeding. In addition, l-carnitine administration decreased levels of serum alanine aminotransferase (GPT), glutamic oxalacetic transaminase (GOT) and triglyceride (TG), which were significantly elevated by the irregular feeding. Moreover, mice supplemented with l-carnitine did not display glucose intolerance-associated hallmarks, which were found in the irregular feeding-induced obesity. Furthermore, quantitative real-time polymerase chain reaction (qRT-PCR) analysis indicated that l-carnitine counteracted the negative alterations of lipid metabolic gene expression (fatty acid synthase, 3-hydroxy-3-methyl-glutaryl coenzyme A reductase, cholesterol 7α-hydroxylase, carnitine/acylcarnitine translocase) in the liver and fat of mice caused by the irregular feeding. Therefore, our results suggest that the time-delayed pattern of eating can induce adiposity and lipid metabolic disorders, while l-carnitine supplementation might prevent these negative symptoms.
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Affiliation(s)
- Tao Wu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Anqi Guo
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Qingyu Shu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Yangjian Qi
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Ying Kong
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Zhiping Sun
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Shumin Sun
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China
| | - Zhengwei Fu
- College of Biological and Environmental Engineering, Zhejiang University of Technology, China.
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Reyes-Esparza J, Mendoza-Rivera B, De la Cruz-Cordero R, Duarte-Vázquez MÁ, Rosado JL, Rodríguez-Fragoso L. Pharmacokinetic and pharmacological effects of β-hydroxyphosphocarnitine in animal models. Pharmacology 2014; 94:90-8. [PMID: 25227138 DOI: 10.1159/000366205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 07/28/2014] [Indexed: 11/19/2022]
Abstract
The purpose of this research was to describe the pharmacokinetic parameters of β-hydroxyphosphocarnitine (β-HPC; CAS No. 1220955-20-3) after a single oral dose in rats and rabbits as well as to assess the impact of 14 weeks of β-HPC (100 mg/kg) treatment on the serum metabolites and liver enzymes, body weight, and hepatic steatosis of lean and obese Zucker fa/fa rats. In the case of the rat and rabbit study, the β-HPC area under the curve, biological half-life, and clearance were 2,174.4 versus 3,128 μg ∙ h/ml, 23.7 versus 8.87 h, and 13.9 versus 151.1 ml/h in the rats versus the rabbits, respectively. The values for the time of maximal concentration were 0.58 versus 1.53 h, for the maximal concentration, they were 62.4 versus 221.4 μg/ml, and for the absorption rate constant 0.02 versus 2.40 h(-1), respectively. In the case of the Zucker fa/fa rat study, β-HPC administered orally once a day reduced insulin, triglyceride, and cholesterol levels in the liver and serum; it also reduced weight gain and decreased liver steatosis in obese rats after 14 weeks. β-HPC could therefore potentially be used in the treatment of metabolic syndrome.
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Affiliation(s)
- Jorge Reyes-Esparza
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
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Ishikawa H, Takaki A, Tsuzaki R, Yasunaka T, Koike K, Shimomura Y, Seki H, Matsushita H, Miyake Y, Ikeda F, Shiraha H, Nouso K, Yamamoto K. L-carnitine prevents progression of non-alcoholic steatohepatitis in a mouse model with upregulation of mitochondrial pathway. PLoS One 2014; 9:e100627. [PMID: 24983359 PMCID: PMC4077577 DOI: 10.1371/journal.pone.0100627] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 05/29/2014] [Indexed: 12/14/2022] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is a severe form of non-alcoholic fatty liver disease characterized by lobular inflammation, hepatocellular ballooning, and fibrosis with an inherent risk for progression to cirrhosis and hepatocellular carcinoma (HCC). Mitochondrial dysfunction appears to play a role in the progression from simple steatosis to NASH. L-carnitine (L-b-hydroxy-g-N-trimethylaminobutyric acid), an essential nutrient that converts fat into energy in mitochondria, has been shown to ameliorate liver damage. The aim of the present study was to explore the preventive and therapeutic effect of L-carnitine in NASH model mice. Eight-week-old male STAM mice, a NASH-cirrhosis-hepatocarcinogenic model, were divided into 3 experimental groups and fed as follows: 1) high-fat diet (HFD) (control group); 2) HFD mixed with 0.28% L-carnitine (L-carnitine group); and 3) HFD mixed with 0.01% α-tocopherol (α-tocopherol group). After 4 or 8 weeks, mice were sacrificed. Blood samples and livers were collected, and hepatic tumors were counted and measured. Livers were subjected to histological study, immunohistochemical staining of 4-hydroxynonenal and ferritin, determination of 8-OHdG levels, mRNA and protein expressions for multiple genes, and metabolomic analysis. The intestinal microbiome was also analyzed. L-carnitine increased hepatic expression of genes related to long-chain fatty acid transport, mitochondrial β-oxidation, and antioxidant enzymes following suppression of hepatic oxidative stress markers and inflammatory cytokines in NASH, and mice treated with L-carnitine developed fewer liver tumors. Although α-tocopherol resulted in NASH improvement in the same manner as L-carnitine, it increased periodontitis-related microbiotic changes and hepatic iron transport-related gene expression and led to less effective for anti-hepatocarcinogenesis. Conclusion L-carnitine prevents progression of non-alcoholic steatohepatitis in a mouse model by upregulating the mitochondrial β-oxidation and redox system.
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Affiliation(s)
- Hisashi Ishikawa
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Akinobu Takaki
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
- * E-mail:
| | - Ryuichiro Tsuzaki
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tetsuya Yasunaka
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kazuko Koike
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuyuki Shimomura
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiroyuki Seki
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiroshi Matsushita
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuhiro Miyake
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Fusao Ikeda
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hidenori Shiraha
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kazuhiro Nouso
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kazuhide Yamamoto
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Xiang Y, Piao SG, Zou HB, Jin J, Fang MR, Lei DM, Gao BH, Yang CW, Li C. L-carnitine protects against cyclosporine-induced pancreatic and renal injury in rats. Transplant Proc 2014; 45:3127-34. [PMID: 24157049 DOI: 10.1016/j.transproceed.2013.08.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND L-carnitine has protective effects against various types of injury. This study was designed to evaluate the beneficial effects of L-carnitine on pancreatic and renal injuries caused by cyclosporine (CsA). METHODS Rats maintained on a low sodium diet were given vehicle (olive oil, 1 mL/kg/d), CsA (15 mg/kg/d), L-carnitine (50 or 200 mg/kg/d), or a combination of CsA and L-carnitine for 4 weeks. The impact of L-carnitine on pancreatic injury was assessed by blood glucose levels, plasma insulin concentrations, and hemoglobulin A1c (HbA1c). In addition, the protective effects of L-carnitine against CsA-induced kidney injury were evaluated in terms of renal function, histopathology (inflammatory cell influx and tubulointerstitial fibrosis), oxidative stress (8-hydroxy 2'-deoxyguanosine, 8-OHdG), transforming growth factor-betal (TGF-β1), apoptosis (caspase-3), and autophagy (LC3-II). RESULTS CsA treatment caused diabetes, renal dysfunction, tubulointerstitial inflammation (ED-1-positive cells), and fibrosis, which were accompanied by an increase in 8-OHdG production and upregulation of TGF-β1, caspase-3, and LC3-II. Concomitant administration of L-carnitine increased plasma insulin concentrations, decreasing plasma glucose and HbA1c levels. In the kidney, L-carnitine induced dose-dependent improvement of renal function, inflammation, and fibrosis in parallel with suppression of the expression of TGF-β1 and 8-OHdG. Furthermore, the administration of L-carnitine at a high dose inhibited the expression of caspase-3 and LC3-II. CONCLUSION These findings suggest that L-carnitine has a protective effect against CsA-induced pancreatic and renal injuries.
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Affiliation(s)
- Y Xiang
- Nephrology & Dialysis Unit, Department of Internal Medicine, YanBian University Hospital, YanJi, JiLin, PR China
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Takaki A, Kawai D, Yamamoto K. Molecular mechanisms and new treatment strategies for non-alcoholic steatohepatitis (NASH). Int J Mol Sci 2014; 15:7352-79. [PMID: 24786095 PMCID: PMC4057677 DOI: 10.3390/ijms15057352] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 03/28/2014] [Accepted: 04/10/2014] [Indexed: 02/07/2023] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is a severe form of non-alcoholic fatty liver disease (NAFLD), in which most patients exhibit non-progressive, non-alcoholic fatty liver (NAFL) attributable to simple steatosis. Multiple hits, including genetic differences, fat accumulation, insulin resistance and intestinal microbiota changes, account for the progression of NASH. NAFLD is strongly associated with obesity, which induces adipokine secretion, endoplasmic reticulum (ER) and oxidative stress at the cellular level, which in turn induces hepatic steatosis, inflammation and fibrosis. Among these factors, gut microbiota are acknowledged as having an important role in initiating this multifactorial disease. Oxidative stress is considered to be a key contributor in the progression from NAFL to NASH. Macrophage infiltration is apparent in NAFL and NASH, while T-cell infiltration is apparent in NASH. Although several clinical trials have shown that antioxidative therapy with vitamin E can effectively control hepatitis pathology in the short term, the long-term effects remain obscure and have often proved to be ineffective in many other diseases. Several long-term antioxidant protocols have failed to reduce mortality. New treatment modalities that incorporate current understanding of NAFLD molecular pathogenesis must be considered.
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Affiliation(s)
- Akinobu Takaki
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan.
| | - Daisuke Kawai
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan.
| | - Kazuhide Yamamoto
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan.
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Dong J, Xu H, Xu H, Wang PF, Cai GJ, Song HF, Wang CC, Dong ZT, Ju YJ, Jiang ZY. Nesfatin-1 stimulates fatty-acid oxidation by activating AMP-activated protein kinase in STZ-induced type 2 diabetic mice. PLoS One 2013; 8:e83397. [PMID: 24391760 PMCID: PMC3877039 DOI: 10.1371/journal.pone.0083397] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 11/05/2013] [Indexed: 11/19/2022] Open
Abstract
Nesfatin-1 is an anorexigenic peptide involved in energy homeostasis. Recently, nesfatin-1 was reported to decrease blood glucose level and improve insulin sensitivity in high-fat diet-fed rats. However, little information is known about the influence of nesfatin-1 on lipid metabolism either in physiological or diabetic condition. This study undertook whether nesfatin-1 was involved in the pathophysiology in Streptozotocin-induced type 2 diabetic mice (T2DM), which was induced by a combination of high-calorie diet and two low-doses Streptozotocin. We observed that plasma nesfatin-1 was significantly increased while expression of nesfatin-1 neurons were decreased in hypothalamus in diabetes group compared to only high-calorie diet control group; intravenous injection of nesfatin-1 decreased 0–1h, 0–2h, 0–3h cumulative food intake in T2DM, but 0–24h total food intake had no difference between groups. Body weight and plasma FFA were normalized after nesfatin-1(10 µg/Kg) administration for 6 days. These results suggested that nesfatin-1 improved lipid disorder in T2DM. It was found that blood glucose and insulin resistance coefficient decreased with treatment of nesfatin-1 (both in 1 µg/Kg and 10 µg/Kg doses) in diabetes mice. For further understanding the role of nesfatin-1 on lipid metabolism, we detected p-AMPK and p-ACC of skeletal muscle in T2DM using western blotting. The expression of p-AMPK and p-ACC increased when nesfatin-1 was given with doses 1 µg/Kg but not in doses 10 µg/Kg. Taken together, nesfatin-1 participated in the development of T2DM and stimulated free fatty acid utilization via AMPK-ACC pathway in skeletal muscle in T2DM.
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MESH Headings
- AMP-Activated Protein Kinases/metabolism
- Acetyl-CoA Carboxylase/metabolism
- Animals
- Blood Glucose/metabolism
- Calcium-Binding Proteins/administration & dosage
- Calcium-Binding Proteins/blood
- Calcium-Binding Proteins/metabolism
- DNA-Binding Proteins/administration & dosage
- DNA-Binding Proteins/blood
- DNA-Binding Proteins/metabolism
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/etiology
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/etiology
- Diabetes Mellitus, Type 2/metabolism
- Diet, High-Fat/adverse effects
- Enzyme Activation
- Fatty Acids, Nonesterified/blood
- Fatty Acids, Nonesterified/metabolism
- Gastric Mucosa/metabolism
- Hypothalamus/metabolism
- Insulin/blood
- Insulin Resistance
- Male
- Mice
- Muscle, Skeletal/metabolism
- Nerve Tissue Proteins/administration & dosage
- Nerve Tissue Proteins/blood
- Nerve Tissue Proteins/metabolism
- Nucleobindins
- Oxidation-Reduction
- Phosphorylation
- Streptozocin/toxicity
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Affiliation(s)
- Jing Dong
- Physiology Department of Medical College, Qingdao University, Qingdao, China
- Special Medicine Department of Medical College, Qingdao University, Qingdao, China
- * E-mail: (JD); (Z-YJ)
| | - Huan Xu
- Class 2, Grade 2009, Medical College, Qingdao University, Qingdao, China
| | - Huan Xu
- Grade 2009, Medical College, Qingdao University, Qingdao, China
| | - Peng-fei Wang
- Grade 2008, Medical College, Qingdao University, Qingdao, China
| | - Gui-ju Cai
- Grade 2008, Medical College, Qingdao University, Qingdao, China
| | - Hai-feng Song
- Grade 2009, Medical College, Qingdao University, Qingdao, China
| | - Chang-chen Wang
- Grade 2009, Medical College, Qingdao University, Qingdao, China
| | - Zhao-tong Dong
- Grade 2010, Medical College, Qingdao University, Qingdao, China
| | - Yan-jiao Ju
- Grade 2010, Medical College, Qingdao University, Qingdao, China
| | - Zheng-yao Jiang
- Physiology Department of Medical College, Qingdao University, Qingdao, China
- * E-mail: (JD); (Z-YJ)
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Brown MV, Compton SA, Milburn MV, Lawton KA, Cheatham B. Metabolomic signatures in lipid-loaded HepaRGs reveal pathways involved in steatotic progression. Obesity (Silver Spring) 2013; 21:E561-70. [PMID: 23512965 PMCID: PMC3689848 DOI: 10.1002/oby.20440] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 02/21/2013] [Indexed: 12/30/2022]
Abstract
OBJECTIVES A spectrum of disorders including simple steatosis, nonalcoholic steatohepatitis, fibrosis, and cirrhosis is described by nonalcoholic fatty liver disease (NAFLD). With the increased prevalence of obesity, and consequently NAFLD, there is a need for novel therapeutics in this area. To facilitate this effort, a cellular model of hepatic steatosis was developed using HepaRG cells and the resulting biochemical alterations were determined. DESIGN AND METHODS Using global metabolomic profiling, by means of a novel metabolite extraction procedure, the metabolic profiles in response to the saturated fatty acid palmitate, and a mixture of saturated and unsaturated fatty acids, palmitate and oleate (1:2) were examined. RESULTS We observed elevated levels of the branched chain amino acids, tricarboxylic acid cycle intermediates, sphingosine and acylcarnitines, and reduced levels of carnitine in the steatotic HepaRG model with both palmitate and palmitate:oleate treatments. In addition, elevated levels of diacylglycerols and monoacylglycerols as well as altered bile acid metabolism were selectively displayed by palmitate-induced steatotic cells. CONCLUSIONS Biochemical changes in pathways important in the transition to hepatic steatosis including insulin resistance, altered mitochondrial metabolism, and oxidative stress are revealed by this global metabolomic approach. Moreover, the utility of this in vitro model for investigating the mechanisms of steatotic progression, insulin resistance, and lipotoxicity in NAFLD was demonstrated.
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Acetyl-L-carnitine and lipoic acid improve mitochondrial abnormalities and serum levels of liver enzymes in a mouse model of nonalcoholic fatty liver disease. Nutr Res 2013; 33:932-41. [PMID: 24176233 DOI: 10.1016/j.nutres.2013.08.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 08/01/2013] [Accepted: 08/02/2013] [Indexed: 12/21/2022]
Abstract
Mitochondrial abnormalities are suggested to be associated with the development of nonalcoholic fatty liver. Liver mitochondrial content and function have been shown to improve in oral feeding of acetyl-L-carnitine (ALC) to rodents. Carnitine is involved in the transport of acyl-coenzyme A across the mitochondrial membrane to be used in mitochondrial β-oxidation. We hypothesized that oral administration ALC with the antioxidant lipoic acid (ALC + LA) would benefit nonalcoholic fatty liver. To test our hypothesis, we fed Balb/C mice a standard diet (SF) or SF with ALC + LA or high-fat diet (HF) or HF with ALC + LA for 6 months. Acetyl-L-carnitine and LA were dissolved at 0.2:0.1% (wt/vol) in drinking water, and mice were allowed free access to food and water. Along with physical parameters, insulin resistance (blood glucose, insulin, glucose tolerance), liver function (alanine transaminase [ALT], aspartate transaminase [AST]), liver histology (hematoxylin and eosin), oxidative stress (malondialdehyde), and mitochondrial abnormalities (carbamoyl phosphate synthase 1 and electron microscopy) were done. Compared with SF, HF had higher body, liver, liver-to-body weight ratio, white adipose tissue, ALT, AST, liver fat, oxidative stress, and insulin resistance. Coadministration of ALC + LA to HF animals significantly improved the mitochondrial marker carbamoyl phosphate synthase 1 and the size of the mitochondria in liver. Alanine transaminase and AST levels were decreased. In a nonalcoholic fatty liver mice model, ALC + LA combination improved liver mitochondrial content, size, serum ALT, and AST without significant changes in oxidative stress, insulin resistance, and liver fat accumulation.
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37
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Akgul EO, Toygar M, Poyrazoglu Y. Evaluating the mitochondrial function. Diabetol Metab Syndr 2012; 4:11. [PMID: 22475619 PMCID: PMC3339514 DOI: 10.1186/1758-5996-4-11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Accepted: 04/04/2012] [Indexed: 11/10/2022] Open
Affiliation(s)
- Emin Ozgur Akgul
- Department of Clinical Chemistry, Gulhane School Of Medicine, Ankara, Turkey
| | - Mehmet Toygar
- Department of Forensic Medicine, Gulhane School Of Medicine, Ankara, Turkey
| | - Yavuz Poyrazoglu
- Department of General Surgery, Gulhane School Of Medicine, Ankara, Turkey
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38
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Mouzaki M, Allard J. Non-alcoholic steatohepatitis: the therapeutic challenge of a global epidemic. Ann Gastroenterol 2012; 25:207-217. [PMID: 24713803 PMCID: PMC3959359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 04/02/2012] [Indexed: 11/23/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most common liver disease worldwide. Nonalcoholic steatohepatitis (NASH) reflects severe liver disease within the NAFLD spectrum and can progress to end-stage liver disease. Within this manuscript we review the available evidence for the treatment of NASH as well as the newer therapeutic agents that are currently being investigated.
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Affiliation(s)
- Marialena Mouzaki
- Department of Pediatrics, Division of Gastroenterology, Hospital for Sick Children (Marialena Mouzaki),Department of Medicine, University Health Network (Marialena Mouzaki, Johane Allard), Toronto, ON, Canada
| | - Johane Allard
- Department of Medicine, University Health Network (Marialena Mouzaki, Johane Allard), Toronto, ON, Canada,
Correspondence to: Johane Allard, MD, FRCPC, Department of Medicine, Toronto General Hospital, University Health Network, 585 University Avenue, Suite 9-N-973, Toronto, Ontario, Canada M5G 2C4, Tel: +416 340 5159, Fax: +416 348 0065, e-mail: Johane.
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