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Umeki Y, Hala D, Petersen LH. Optimization of an in situ liver perfusion method to evaluate hepatic function of juvenile American alligators (Alligator mississippiensis). Biol Open 2024; 13:bio060532. [PMID: 39189399 DOI: 10.1242/bio.060532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Accepted: 06/28/2024] [Indexed: 08/28/2024] Open
Abstract
American alligators (Alligator mississippiensis) are a sentinel species whose health is representative of environmental quality. However, their susceptibility to various natural or anthropogenic stressors is yet to be comprehensively studied. Understanding hepatic function in such assessments is essential as the liver is the central organ in the metabolic physiology of an organism, and therefore influences its adaptive capability. In this study, a novel liver perfusion system was developed to study the hepatic physiology of juvenile alligators. First, a cannulation procedure was developed for an in situ liver perfusion preparation. Second, an optimal flow rate of 0.5 ml/min/g liver was determined based on the oxygen content in the effluent perfusate. Third, the efficacy of the liver preparation was tested by perfusing the liver with normoxic or hypoxic Tyrode's buffer while various biomarkers of hepatic function were monitored in the effluent perfusate. Our results showed that in the normoxic perfusion, the aspartate transferase (AST) and lactate/pyruvate ratio in the perfusate remained stable and within an acceptable physiological range for 6 h. In contrast, hypoxia exposure significantly increased the lactate/pyruvate ratio in the perfusate after 2 h, indicating an induction of anaerobic metabolism. These results suggest that the perfused liver remained viable during the perfusion period and exhibited the expected physiological response under hypoxia exposure. The liver perfusion system developed in this study provides an experimental framework with which to study the basic hepatic physiology of alligators and elucidate the effects of environmental or anthropogenic stressors on the metabolic physiology of this sentinel species.
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Affiliation(s)
- Yu Umeki
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX, 77553,USA
| | - David Hala
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX, 77553,USA
| | - Lene Hebsgaard Petersen
- Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX, 77553,USA
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Hsieh HC, Chang WP, Huang PJ, Wang CH, Lin YH. Effectiveness of Exercise Interventions on Body Composition, Exercise Capacity, Fatigue, and Quality of Life in Patients with Liver Cirrhosis: A Meta-Analysis of Randomized Controlled Trials. Dig Dis Sci 2024; 69:2655-2666. [PMID: 38656415 DOI: 10.1007/s10620-024-08447-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 04/09/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Diminished muscle protein synthesis in cirrhosis leads to reduced strength and mass, impacting daily activities and overall quality of life. AIMS This study aimed to examine the effectiveness of exercise intervention in body composition, exercise capacity, fatigue, and quality of life in patients with liver cirrhosis. METHODS A systematic search of medical databases, including PubMed, Embase, Cochrane, and CINAHL, was executed from their inception to November 2022. The inclusion criteria were randomized controlled trials comparing exercise interventions with a control group that did not receive exercise interventions. RESULTS From the initially identified 2,565 articles, eight studies with a total of 220 patients were eligible for inclusion in this meta-analysis. According to the meta-analysis, exercise significantly improved the six-minute walk distance (6MWD) by 68.93 m (95% CI 14.29-123.57) compared to the control group. Furthermore, the subgroup analysis revealed that combing exercise with amino acid supplementation had a greater positive effect on the 6MWD (MD = 144.72, 95% CI 87.44-202.01). Exercise also significantly increased thigh circumference (MD = 1.26, 95% CI 0.12-2.39) and the thigh ultrasound average compression index (MD = 0.07, 95% CI 0.00-0.14). Moreover, exercise significantly decreased fatigue levels by 0.7 points in patients with liver cirrhosis (95% CI 0.38-1.03). However, no significant effects were observed on body mass index (BMI), fat mass, fat-free mass, and quality of life. CONCLUSIONS Exercise can improve exercise capacity, thigh muscle thickness, and fatigue in patients with cirrhosis, but it does not have a significant impact on fat mass, BMI, or quality of life.
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Affiliation(s)
- Huei-Chi Hsieh
- Department of Nursing, Hsinchu MacKay Memorial Hospital, Hsinchu, Taiwan
| | - Wen-Pei Chang
- Department of Nursing, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Po-Jui Huang
- Division of Gastroenterology, Wan Fang Hospital, Taipei Medical University, Taipei, 110301, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, 250 Wuxing St., Xinyi Dist., Taipei, 11031, Taiwan
| | - Chia-Hui Wang
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Yu-Huei Lin
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, 250 Wu-Hsing Street, Taipei, 11031, Taiwan.
- Research Center in Nursing Clinical Practice, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.
- Department of Nursing, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.
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Zdyrski C, Gabriel V, Gessler TB, Ralston A, Sifuentes-Romero I, Kundu D, Honold S, Wickham H, Topping NE, Sahoo DK, Bista B, Tamplin J, Ospina O, Piñeyro P, Arriaga M, Galan JA, Meyerholz DK, Allenspach K, Mochel JP, Valenzuela N. Establishment and characterization of turtle liver organoids provides a potential model to decode their unique adaptations. Commun Biol 2024; 7:218. [PMID: 38388772 PMCID: PMC10883927 DOI: 10.1038/s42003-024-05818-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/15/2024] [Indexed: 02/24/2024] Open
Abstract
Painted turtles are remarkable for their freeze tolerance and supercooling ability along with their associated resilience to hypoxia/anoxia and oxidative stress, rendering them an ideal biomedical model for hypoxia-induced injuries (including strokes), tissue cooling during surgeries, and organ cryopreservation. Yet, such research is hindered by their seasonal reproduction and slow maturation. Here we developed and characterized adult stem cell-derived turtle liver organoids (3D self-assembled in vitro structures) from painted, snapping, and spiny softshell turtles spanning ~175My of evolution, with a subset cryopreserved. This development is, to the best of our knowledge, a first for this vertebrate Order, and complements the only other non-avian reptile organoids from snake venom glands. Preliminary characterization, including morphological, transcriptomic, and proteomic analyses, revealed organoids enriched in cholangiocytes. Deriving organoids from distant turtles and life stages demonstrates that our techniques are broadly applicable to chelonians, permitting the development of functional genomic tools currently lacking in herpetological research. Such platform could potentially support studies including genome-to-phenome mapping, gene function, genome architecture, and adaptive responses to climate change, with implications for ecological, evolutionary, and biomedical research.
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Affiliation(s)
- Christopher Zdyrski
- SMART Pharmacology, Department of Biomedical Sciences, Iowa State University, Ames, IA, USA.
- 3D Health Solutions Inc., Ames, IA, USA.
- SMART Pharmacology, Precision One Health Initiative, University of Georgia, Athens, GA, USA.
| | - Vojtech Gabriel
- SMART Pharmacology, Department of Biomedical Sciences, Iowa State University, Ames, IA, USA
| | - Thea B Gessler
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA
| | | | - Itzel Sifuentes-Romero
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA
| | - Debosmita Kundu
- Department of Statistics, Iowa State University, Ames, IA, USA
| | - Sydney Honold
- SMART Pharmacology, Department of Biomedical Sciences, Iowa State University, Ames, IA, USA
| | - Hannah Wickham
- SMART Pharmacology, Department of Biomedical Sciences, Iowa State University, Ames, IA, USA
| | - Nicholas E Topping
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA
| | - Dipak Kumar Sahoo
- Department of Veterinary Clinical Sciences, Iowa State University, Ames, IA, USA
| | - Basanta Bista
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA
| | - Jeffrey Tamplin
- Department of Biology, University of Northern Iowa, Cedar Falls, IA, USA
| | - Oscar Ospina
- Department of Biostatistics and Bioinformatics, Moffitt Cancer Center, Tampa, FL, USA
| | - Pablo Piñeyro
- Veterinary Diagnostic Laboratory, Iowa State University, Ames, IA, USA
| | - Marco Arriaga
- Department of Human Genetics, University of Texas Rio Grande Valley, Brownsville, TX, USA
| | - Jacob A Galan
- Department of Human Genetics, University of Texas Rio Grande Valley, Brownsville, TX, USA
| | | | - Karin Allenspach
- SMART Pharmacology, Department of Biomedical Sciences, Iowa State University, Ames, IA, USA
- 3D Health Solutions Inc., Ames, IA, USA
- Department of Veterinary Clinical Sciences, Iowa State University, Ames, IA, USA
- SMART Pharmacology, Precision One Health Initiative, University of Georgia, Athens, GA, USA
| | - Jonathan P Mochel
- SMART Pharmacology, Department of Biomedical Sciences, Iowa State University, Ames, IA, USA
- 3D Health Solutions Inc., Ames, IA, USA
- SMART Pharmacology, Precision One Health Initiative, University of Georgia, Athens, GA, USA
| | - Nicole Valenzuela
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA.
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Ducros L, Touaibia M, Pichaud N, Lamarre SG. Resilience and phenotypic plasticity of Arctic char ( Salvelinus alpinus) facing cyclic hypoxia: insights into growth, energy stores and hepatic metabolism. CONSERVATION PHYSIOLOGY 2023; 11:coad099. [PMID: 38107465 PMCID: PMC10724465 DOI: 10.1093/conphys/coad099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 09/13/2023] [Accepted: 11/22/2023] [Indexed: 12/19/2023]
Abstract
Arctic char (Salvelinus alpinus) is facing the decline of its southernmost populations due to several factors including rising temperatures and eutrophication. These conditions are also conducive to episodes of cyclic hypoxia, another possible threat to this species. In fact, lack of oxygen and reoxygenation can both have serious consequences on fish as a result of altered ATP balance and an elevated risk of oxidative burst. Thus, fish must adjust their phenotype to survive and equilibrate their energetic budget. However, their energy allocation strategy could imply a reduction in growth which could be deleterious for their fitness. Although the impact of cyclic hypoxia is a major issue for ecosystems and fisheries worldwide, our knowledge on how salmonid deal with high oxygen fluctuations remains limited. Our objective was to characterize the effects of cyclic hypoxia on growth and metabolism in Arctic char. We monitored growth parameters (specific growth rate, condition factor), hepatosomatic and visceral indexes, relative heart mass and hematocrit of Arctic char exposed to 30 days of cyclic hypoxia. We also measured the hepatic protein synthesis rate, hepatic triglycerides as well as muscle glucose, glycogen and lactate and quantified hepatic metabolites during this treatment. The first days of cyclic hypoxia slightly reduce growth performance with a downward trend in specific growth rate in mass and condition factor variation compared to the control group. This acute exposure also induced a profound metabolome reorganization in the liver with an alteration of amino acid, carbohydrate and lipid metabolisms. However, fish rebalanced their metabolic activities and successfully maintained their growth and energetic reserves after 1 month of cyclic hypoxia. These results demonstrate the impressive ability of Arctic char to cope with its changing environment but also highlight a certain vulnerability of this species during the first days of a cyclic hypoxia event.
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Affiliation(s)
- Loïck Ducros
- Département de Biologie, Université de Moncton, 18 Antonine Maillet, Moncton E1A 3E9, NB, Canada
- Département de Chimie et Biochimie, Université de Moncton, 18 Antonine Maillet, Moncton E1A 3E9, NB, Canada
| | - Mohamed Touaibia
- Département de Chimie et Biochimie, Université de Moncton, 18 Antonine Maillet, Moncton E1A 3E9, NB, Canada
| | - Nicolas Pichaud
- Département de Chimie et Biochimie, Université de Moncton, 18 Antonine Maillet, Moncton E1A 3E9, NB, Canada
| | - Simon G Lamarre
- Département de Biologie, Université de Moncton, 18 Antonine Maillet, Moncton E1A 3E9, NB, Canada
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Daftari G, Tehrani AN, Pashayee-Khamene F, Karimi S, Ahmadzadeh S, Hekmatdoost A, Salehpour A, Saber-Firoozi M, Hatami B, Yari Z. Dietary protein intake and mortality among survivors of liver cirrhosis: a prospective cohort study. BMC Gastroenterol 2023; 23:227. [PMID: 37400778 DOI: 10.1186/s12876-023-02832-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 05/24/2023] [Indexed: 07/05/2023] Open
Abstract
BACKGROUND Liver cirrhosis is a worldwide burden and is associated with poor clinical outcomes, including increased mortality. The beneficial effects of dietary modifications in reducing morbidity and mortality are inevitable. AIM The current study aimed to evaluate the potential association of dietary protein intake with the cirrhosis-related mortality. METHODS In this cohort study, 121 ambulatory cirrhotic patients with at least 6 months of cirrhosis diagnosis were followed-up for 48 months. A 168-item validated food frequency questionnaire was used for dietary intake assessment. Total dietary protein was classified as dairy, vegetable and animal protein. We estimated crude and multivariable-adjusted hazard ratios (HRs) with 95% confidence intervals (CIs), applying Cox proportional hazard analyses. RESULTS After full adjustment for confounders, analyses showed that total (HR = 0.38, 95% CI = 0.2-1.1, p trend = 0.045) and dairy (HR = 0.38, 95% CI = 0.13-1.1, p trend = 0.046) protein intake was associated with a 62% lower risk of cirrhosis-related mortality. While a higher intake of animal protein was associated with a 3.8-fold increase in the risk of mortality in patients (HR = 3.8, 95% CI = 1.7-8.2, p trend = 0.035). Higher intake of vegetable protein was inversely but not significantly associated with mortality risk. CONCLUSION A comprehensive evaluation of the associations of dietary protein intake with cirrhosis-related mortality indicated that a higher intakes of total and dairy protein and a lower intakes of animal protein are associated with a reduced risk of mortality in cirrhotic patients.
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Affiliation(s)
- Ghazal Daftari
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Asal Neshatbini Tehrani
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Nutrition, School of Allied Medical Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Fereshteh Pashayee-Khamene
- Clinical Nutrition and Dietetics Department, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences Tehran, Tehran, Iran
| | - Sara Karimi
- Clinical Nutrition and Dietetics Department, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences Tehran, Tehran, Iran
| | - Saleheh Ahmadzadeh
- Clinical Nutrition and Dietetics Department, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences Tehran, Tehran, Iran
| | - Azita Hekmatdoost
- Clinical Nutrition and Dietetics Department, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences Tehran, Tehran, Iran
| | - Amin Salehpour
- Occupational Health Research Center, School of Public Health, Iran University of Medical Science, Tehran, Iran
| | - Mahdi Saber-Firoozi
- Digestive Disease Research Center, Digestive Disease Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Behzad Hatami
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Yari
- Department of Nutrition Research, National Nutrition and Food Technology Research Institute and Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences Tehran, West Arghavan St. Farahzadi Blvd., Sharake Qods, Tehran, Iran.
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Effect of Dietary Blue-Green Microalgae Inclusion as a Replacement to Soybean Meal on Laying Hens' Performance, Egg Quality, Plasma Metabolites, and Hematology. Animals (Basel) 2022; 12:ani12202816. [PMID: 36290201 PMCID: PMC9597824 DOI: 10.3390/ani12202816] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/08/2022] [Accepted: 10/15/2022] [Indexed: 11/17/2022] Open
Abstract
Spirulina platensisis (SP) is a blue-green microalgae with a high value for animal and poultry nutrition. The study employed 250 40-week-old, HY-Line W-36 commercial laying hens. The layers received one of five experimental diet substitutes in five groups for 10 consecutive weeks (five replicates of 10 hens each group); a soybean-corn basal diet formulation without SP (Control group) or the soybean partially substituted with 3% SP, 6% SP, 9% SP, and 12% SP (for the remaining four groups). The results showed that dietary SP treatment significantly (p < 0.05) improved the productive performance, egg quality, blood metabolites, and hematological parameters of laying hens. In addition, there were linear and quadratic effects for increasing the levels of SP inclusion into the layer diets; however, the highest values of most parameters were observed when using 9% SP (90 g/kg of the layer diets). Furthermore, the results showed that 4.7% of the soybean meal ingredient in the layer diet could be replaced by 1% of SP. In conclusion, the partial replacement of soybean meal by SP into layer diets could be used as a promising nutritional approach to optimize the performance of laying hens.
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Kwon D, Lee W, Kim SH, Jung YS. Comparison of Hepatic Metabolite Profiles between Infant and Adult Male Mice Using 1H-NMR-Based Untargeted Metabolomics. Metabolites 2022; 12:metabo12100910. [PMID: 36295812 PMCID: PMC9611911 DOI: 10.3390/metabo12100910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 11/28/2022] Open
Abstract
Although age-related characteristics of hepatic metabolism are reported, those in infants are not fully understood. In the present study, we performed untargeted metabolomic profiling of the livers of infant (3-week-old) and adult (9-week-old) male ICR mice using 1H-NMR spectroscopy and compared 35 abundant hepatic metabolite concentrations between the two groups. The liver/body weight ratio did not differ between the two groups; however, serum glucose, blood urea nitrogen, total cholesterol, and triglyceride concentrations were lower in infants than in adults. Hepatic carbohydrate metabolites (glucose, maltose, and mannose) were higher, whereas amino acids (glutamine, leucine, methionine, phenylalanine, tyrosine, and valine) were lower in infant mice than in adult mice. The concentrations of ascorbate, betaine, sarcosine, and ethanolamine were higher, whereas those of taurine, inosine, and O-phosphocholine were lower in infant mice than in adult mice. The differences in liver metabolites between the two groups could be due to differences in their developmental stages and dietary sources (breast milk for infants and laboratory chow for adults). The above results provide insights into the hepatic metabolism in infants; however, the exact implications of the findings require further investigation.
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Affiliation(s)
- Doyoung Kwon
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Korea
- Jeju Research Institute of Pharmaceutical Sciences, College of Pharmacy, Jeju National University, Jeju 690-756, Korea
| | - Wonho Lee
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Sou Hyun Kim
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Korea
- Correspondence: (S.H.K.); (Y.-S.J.); Tel.: +82-51-5102816 (Y.-S.J.)
| | - Young-Suk Jung
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Korea
- Correspondence: (S.H.K.); (Y.-S.J.); Tel.: +82-51-5102816 (Y.-S.J.)
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Xie S, He J, Masagounder K, Liu Y, Tian L, Tan B, Niu J. Dietary lysine levels modulate the lipid metabolism, mitochondrial biogenesis and immune response of grass carp, Ctenopharyngodon idellus. Anim Feed Sci Technol 2022. [DOI: 10.1016/j.anifeedsci.2022.115375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Adil N, Siddiqui AJ, Musharraf SG. Metabolomics‐based Researches in Autoimmune Liver Disease: A
Mini‐Review. Scand J Immunol 2022. [DOI: 10.1111/sji.13208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Nurmeen Adil
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan
| | - Amna Jabbar Siddiqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan
| | - Syed Ghulam Musharraf
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan
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Intermittent Lighting Program Relieves the Deleterious Effect of Heat Stress on Growth, Stress Biomarkers, Physiological Status, and Immune Response of Broiler Chickens. Animals (Basel) 2022; 12:ani12141834. [PMID: 35883381 PMCID: PMC9311685 DOI: 10.3390/ani12141834] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/18/2022] [Accepted: 07/18/2022] [Indexed: 01/10/2023] Open
Abstract
Simple Summary Chronic heat stress remains the most detrimental factor for broiler productivity in hot and desert regions. The manipulation of the lighting program is a useful and inexpensive tool to alleviate the negative effects of heat stress on broiler performance. The present study aimed to investigate the beneficial effects of an intermittent lighting (I.L.) program consisting of repeated periods of 1 h light to 3 h dark during a day on broiler performance under chronic heat-stress conditions. The results indicate that applying the I.L. program to heat-stressed broilers relieved the stress indicators and improved the immune response, physiological status, and growth performance of broilers. Therefore, the application of the I.L. program could be used as a beneficial strategy to recover broiler performance during heat-stress conditions. Abstract The effects of heat stress on broiler performance and immunological response were explored using lighting-program manipulation as a potential tool. The study included 200 Cobb500 broiler chicks that were one day old at the time of recruitment. The birds were divided into four-compartment groups with similar environments (five cages per compartment, ten chicks per cage). Starting from the fourth day of age, birds of two compartments received a continuous lighting program (23L:1D a day; C.L. groups) while birds of the other two compartments received an intermittent lighting program (1L:3D 6 times per day; I.L. groups). Within each lighting program during 22–42 d of age, one group was subjected either to a thermoneutral temperature at 24 °C or heat stress at 35 °C. The results reveal that stress biomarkers, especially the plasma concentrations of corticosterone (CORT), tumor necrosis factor-alpha (TNF-α), and malondialdehyde (MDA) were relieved by 46%, 27%, and 51%, respectively, in the I.L. treatment groups compared to the C.L. program in broiler chicks subjected to heat stress. The liver function was also improved by 24% and 32% in AST and ALT levels, respectively, in the I.L. program compared to the C.L. program in stressed birds. Furthermore, the I.L. program positively influenced the immune response of the heat-stressed broilers. Eventually, the I.L. program increased the heat-stressed broilers’ body weight gain and feed conversion ratio. It can be concluded that applying the I.L. program to broiler chickens can effectively improve their physiological balance and growth performance under heat-stress conditions.
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Kroupina K, Bémeur C, Rose CF. Amino acids, ammonia, and hepatic encephalopathy. Anal Biochem 2022; 649:114696. [DOI: 10.1016/j.ab.2022.114696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 03/30/2022] [Accepted: 04/21/2022] [Indexed: 11/30/2022]
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Celepli S, Çolak B, Celepli P, Bigat İ, Batur HG, Soysal F, Karakurt S, Hücümenoğlu S, Kısmet K, Şahin M. Effects of artichoke leaf extract on hepatic ischemia-reperfusion injury. REVISTA DA ASSOCIACAO MEDICA BRASILEIRA (1992) 2021; 68:87-93. [PMID: 34909970 DOI: 10.1590/1806-9282.20210840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 09/24/2021] [Indexed: 01/10/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate the hepatoprotective effect and mechanism of action of artichoke leaf extract in hepatic ischemia/reperfusion injury. METHODS Rats were divided into three groups such as sham, control, and artichoke leaf extract groups. Antioxidant enzyme activities and biochemical parameters were examined from the tissue and serum obtained from the subjects. Histopathological findings were scored semiquantitatively. RESULTS Statistically, the antioxidant activity was highest in the artichoke leaf extract group, the difference in biochemical parameters and C-reactive protein was significant compared with the control group, and the histopathological positive effects were found to be significantly higher. CONCLUSIONS As a result, artichoke leaf extract had a hepatoprotective effect and that this effect was related to the antioxidant and anti-inflammatory effects of artichoke.
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Affiliation(s)
- Salih Celepli
- Gülhane Training and Research Hospital, Department of General Surgery - Ankara, Turkey
| | - Bayram Çolak
- Selçuk University, Faculty of Medicine, Department of General Surgery - Konya, Turkey
| | - Pınar Celepli
- Ankara Training and Research Hospital, Department of Pathology - Ankara, Turkey
| | - İrem Bigat
- TOBB University of Economics & Technology, Department of Biomedical Engineering - Ankara, Turkey
| | - Hatice Gül Batur
- Selçuk University, Science Faculty, Biochemistry Department - Konya, Turkey
| | - Furkan Soysal
- Ankara Yıldırım Beyazıt University, Faculty of Engineering and Natural Sciences, Department of Chemical Engineering - Konya, Turkey
| | - Serdar Karakurt
- Selçuk University, Science Faculty, Biochemistry Department - Konya, Turkey
| | - Sema Hücümenoğlu
- Ankara Training and Research Hospital, Department of Pathology - Ankara, Turkey
| | - Kemal Kısmet
- Selçuk University, Faculty of Nursing, Department of Surgical Nursing - Konya, Turkey
| | - Mustafa Şahin
- Selçuk University, Faculty of Medicine, Department of General Surgery - Konya, Turkey
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Yishake D, He TT, Liu ZY, Chen S, Luo Y, Liu XZ, Huang RZ, Lan QY, Fang AP, Zhu HL. Dietary protein and prognosis of hepatocellular carcinoma: a prospective cohort study. Food Funct 2021; 12:11568-11576. [PMID: 34709274 DOI: 10.1039/d1fo02013g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Dietary protein has been linked with all-cause and cancer mortality. However, the relationship between dietary protein and the prognosis of hepatocellular carcinoma (HCC) is still unknown. The purpose of this study was to investigate whether dietary protein intake was related to HCC mortality using data from the Guangdong Liver Cancer Cohort (GLCC), a prospective cohort study of HCC survivors established at the Sun Yat-sen University Cancer Center. Dietary information one year before the diagnosis of HCC was obtained through a 79-item semi-quantitative food frequency questionnaire (FFQ). A total of 883 patients with newly diagnosed HCC who were recruited between September 2013 and April 2017 were included in this study. The hazard ratio (HR) and 95% confidence intervals (95% CIs) were estimated by Cox proportional hazard models. The multivariate-adjusted HRs in the highest vs. the lowest tertile of total protein intake were 0.68 (95% CI: 0.52-0.91, P-trend = 0.007) for all-cause mortality and 0.74 (95% CI: 0.55-0.99, P-trend = 0.040) for HCC-specific mortality. However, the associations of animal protein intake, plant protein intake, and animal-to-plant protein ratio with all-cause and HCC-specific mortality were not significant (all P-trend >0.05). Our research suggests that higher prediagnostic dietary intake of total protein was associated with reduced all-cause and HCC-specific mortality.
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Affiliation(s)
- Dinuerguli Yishake
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Tong-Tong He
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Zhao-Yan Liu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Si Chen
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Yan Luo
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Xiao-Zhan Liu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Rong-Zhu Huang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Qiu-Ye Lan
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Ai-Ping Fang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
| | - Hui-Lian Zhu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou 510080, People's Republic of China.
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Heidenreich E, Pfeffer T, Kracke T, Mechtel N, Nawroth P, Hoffmann GF, Schmitt CP, Hell R, Poschet G, Peters V. A Novel UPLC-MS/MS Method Identifies Organ-Specific Dipeptide Profiles. Int J Mol Sci 2021; 22:9979. [PMID: 34576148 PMCID: PMC8465603 DOI: 10.3390/ijms22189979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Amino acids have a central role in cell metabolism, and intracellular changes contribute to the pathogenesis of various diseases, while the role and specific organ distribution of dipeptides is largely unknown. METHOD We established a sensitive, rapid and reliable UPLC-MS/MS method for quantification of 36 dipeptides. Dipeptide patterns were analyzed in brown and white adipose tissues, brain, eye, heart, kidney, liver, lung, muscle, sciatic nerve, pancreas, spleen and thymus, serum and urine of C57BL/6N wildtype mice and related to the corresponding amino acid profiles. RESULTS A total of 30 out of the 36 investigated dipeptides were detected with organ-specific distribution patterns. Carnosine and anserine were most abundant in all organs, with the highest concentrations in muscles. In liver, Asp-Gln and Ala-Gln concentrations were high, in the spleen and thymus, Glu-Ser and Gly-Asp. In serum, dipeptide concentrations were several magnitudes lower than in organ tissues. In all organs, dipeptides with C-terminal proline (Gly-Pro and Leu-Pro) were present at higher concentrations than dipeptides with N-terminal proline (Pro-Gly and Pro-Leu). Organ-specific amino acid profiles were related to the dipeptide profile with several amino acid concentrations being related to the isomeric form of the dipeptides. Aspartate, histidine, proline and serine tissue concentrations correlated with dipeptide concentrations, when the amino acids were present at the C- but not at the N-terminus. CONCLUSION Our multi-dipeptide quantification approach demonstrates organ-specific dipeptide distribution. This method allows us to understand more about the dipeptide metabolism in disease or in healthy state.
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Affiliation(s)
- Elena Heidenreich
- Centre for Organismal Studies (COS), Metabolomics Core Technology Platform, Heidelberg University, 69120 Heidelberg, Germany; (E.H.); (N.M.); (R.H.)
| | - Tilman Pfeffer
- Centre for Paediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany; (T.P.); (T.K.); (G.F.H.); (C.P.S.)
| | - Tamara Kracke
- Centre for Paediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany; (T.P.); (T.K.); (G.F.H.); (C.P.S.)
| | - Nils Mechtel
- Centre for Organismal Studies (COS), Metabolomics Core Technology Platform, Heidelberg University, 69120 Heidelberg, Germany; (E.H.); (N.M.); (R.H.)
| | - Peter Nawroth
- Department of Internal Medicine I and Clinical Chemistry, University Hospital of Heidelberg, 69120 Heidelberg, Germany;
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Institute for Diabetes and Cancer (IDC) Helmholtz Center Munich, 85764 Neuherberg, Germany
- Joint Heidelberg-Institute for Diabetes and Cancer (IDC) Translational Diabetes Program, 85764 Neuherberg, Germany
| | - Georg F Hoffmann
- Centre for Paediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany; (T.P.); (T.K.); (G.F.H.); (C.P.S.)
| | - Claus Peter Schmitt
- Centre for Paediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany; (T.P.); (T.K.); (G.F.H.); (C.P.S.)
| | - Rüdiger Hell
- Centre for Organismal Studies (COS), Metabolomics Core Technology Platform, Heidelberg University, 69120 Heidelberg, Germany; (E.H.); (N.M.); (R.H.)
| | - Gernot Poschet
- Centre for Organismal Studies (COS), Metabolomics Core Technology Platform, Heidelberg University, 69120 Heidelberg, Germany; (E.H.); (N.M.); (R.H.)
| | - Verena Peters
- Centre for Paediatric and Adolescent Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany; (T.P.); (T.K.); (G.F.H.); (C.P.S.)
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15
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Ma J, Cheng Y, Su Q, Ai W, Gong L, Wang Y, Li L, Ma Z, Pan Q, Qiao Z, Chen K. Effects of intermittent fasting on liver physiology and metabolism in mice. Exp Ther Med 2021; 22:950. [PMID: 34335892 PMCID: PMC8290466 DOI: 10.3892/etm.2021.10382] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 06/08/2021] [Indexed: 12/14/2022] Open
Abstract
A broad spectrum of health benefits from intermittent fasting have been reported in studies on animal models and human subjects. However, the underlying mechanisms of these beneficial effects remain largely elusive. The present study aimed to explore the effects and potential mode of action of intermittent fasting in mouse models with a focus on the liver. C57BL/6 mice were subjected to intermittent fasting or ad libitum feeding as controls. It was determined that 12 h of daily intermittent fasting for 30 days significantly reduced the cumulative food intake compared with that in mice with ad libitum feeding. Fasting resulted in a significantly reduced liver mass but only had a minimal effect on bodyweight. The effects on the liver by 30 days of fasting were not reversed by subsequent ad libitum refeeding for 30 days. Among the measured blood biochemical parameters, the levels of blood glucose were decreased, while the levels of alkaline phosphatase were increased in fasting mice. Of note, targeted metabolic profiling revealed global elevation of metabolites in the livers of fasting mice. These metabolic molecules included adenosine triphosphate, nicotinamide adenine dinucleotide phosphate (NADP), reduced NADP and succinate, which are essentially involved in the citric acid cycle and oxidative phosphorylation. Thus, it was concluded that daily 12 h of intermittent fasting for one month significantly reduced the liver weight of mice, which is associated with enhanced liver metabolism.
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Affiliation(s)
- Jianbo Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Yan Cheng
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China.,Experimental Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Qiang Su
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Wen Ai
- Department of Cardiology, Union Shenzhen Hospital, Huazhong University of Science and Technology, Shenzhen, Guangdong 518102, P.R. China
| | - Ling Gong
- Department of Liver Diseases, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang 310015, P.R. China
| | - Yueying Wang
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Linhao Li
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Zhongren Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Qiuwei Pan
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Zilin Qiao
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China
| | - Kan Chen
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, Gansu 730030, P.R. China.,College of Life Science and Medicine, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
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16
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Lee DU, Fan GH, Ahern RR, Karagozian R. The effect of malnutrition on the infectious outcomes of hospitalized patients with cirrhosis: analysis of the 2011-2017 hospital data. Eur J Gastroenterol Hepatol 2021; 32:269-278. [PMID: 33252419 DOI: 10.1097/meg.0000000000001991] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND In patients with cirrhosis, there is a clinical concern that the development of protein-calorie malnutrition will affect the immune system and predispose these patients to increased infectious outcomes. AIMS In this study, we evaluate the effects of malnutrition on the infectious outcomes of patients admitted with cirrhosis. MATERIALS AND METHODS This study used the 2011-2017 National Inpatient Sample to identify patients with cirrhosis. These patients were stratified using malnutrition (protein-calorie malnutrition, cachexia, and sarcopenia) and matched using age, gender, and race with 1:1 nearest neighbor matching method. The endpoints included mortality and infectious outcomes. RESULTS After matching, there were 96 842 malnutrition-present cohort and equal number of controls. In univariate analysis, the malnutrition cohort had higher hospital mortality [10.40 vs. 5.04% P < 0.01, odds ratio (OR) 2.18, 95% confidence interval (CI) 2.11-2.26]. In multivariate models, malnutrition was associated with increased mortality [P < 0.01, adjusted odds ratio (aOR) 1.32, 95% CI 1.27-1.37] and infectious outcomes, including sepsis (P < 0.01, aOR 1.94, 95% CI 1.89-2.00), pneumonia (P < 0.01, aOR 1.68, 95% CI 1.63-1.73), UTI (P < 0.01, aOR 1.39, 95% CI 1.35-1.43), cellulitis (P < 0.01, aOR 1.09, 95% CI 1.05-1.13), cholangitis (P < 0.01, aOR 1.39, 95% CI 1.26-1.55), and clostridium difficile (P < 0.01, aOR 2.11, 95% CI 1.92-2.31). CONCLUSION The results of this study indicate that malnutrition is an independent risk factor of hospital mortality and local/systemic infections in patients admitted with cirrhosis.
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Affiliation(s)
- David Uihwan Lee
- Division of Gastroenterology, Liver Center, Tufts Medical Center, 800 Washington Street, Boston, Massachusetts, USA
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17
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Effectiveness and Safety of Panax ginseng Extract on Hepatic Dysfunction: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:2689565. [PMID: 32724321 PMCID: PMC7381953 DOI: 10.1155/2020/2689565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 06/25/2020] [Indexed: 02/07/2023]
Abstract
Background The purpose of this study was to evaluate the efficacy and safety of Panax ginseng extract (GS-KG9) in the treatment of hepatic dysfunction. Methods A randomized, double-blind, placebo-controlled clinical trial was conducted from December 2017 to January 2019. The trial included 60 subjects between the ages of 19 and 70 who had higher alanine transaminase (ALT) levels than the normal upper limit. The subjects were randomly divided into two groups: GS-KG9 (n = 30) and placebo (n = 30). The former was administered three GS-KG9 capsules (3 g/day) and the latter three placebo capsules (3 g/day) twice each day orally after meals in the morning and evening for 12 weeks. The primary goal was to observe the changes in ALT and gamma-glutamyl transferase (GGT) levels. The safety of the treatment was assessed and adverse events (AEs) were recorded. Results Out of 60 subjects, nine were excluded from the efficacy analysis because they met the exclusion criteria. Therefore, a total of 51 subjects were evaluated for the effectiveness of the treatment (26 in the GS-KG9 group and 25 in the placebo group). After 12 weeks of treatment, the ALT levels were significantly reduced in the GS-KG9 group compared to the placebo group (p=0.009). The GGT level of the GS-KG9 group was significantly lower than that of the placebo group (p=0.036). Mild AEs, such as diarrhea, occurred during the study. There were no significant differences between the two groups. Conclusion The results of this trial suggest that GS-KG9 might be an effective and safe option for mild hepatic dysfunction. This trial is registered with KCT0004080.
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18
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Multi-omics analysis of multiple missions to space reveal a theme of lipid dysregulation in mouse liver. Sci Rep 2019; 9:19195. [PMID: 31844325 PMCID: PMC6915713 DOI: 10.1038/s41598-019-55869-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/30/2019] [Indexed: 12/13/2022] Open
Abstract
Spaceflight has several detrimental effects on the physiology of astronauts, many of which are recapitulated in rodent models. Mouse studies performed on the Space Shuttle showed disruption of lipid metabolism in liver. However, given that these animals were not sacrificed on-orbit and instead returned live to earth, it is unclear if these disruptions were solely induced by space stressors (e.g. microgravity, space radiation) or in part explained by the stress of return to Earth. In this work we analyzed three liver datasets from two different strains of mice (C57BL/6 (Jackson) & BALB/c (Taconic)) flown aboard the International Space Station (ISS). Notably, these animals were sacrificed on-orbit and exposed to varying spaceflight durations (i.e. 21, 37, and 42 days vs 13 days for the Shuttle mice). Oil Red O (ORO) staining showed abnormal lipid accumulation in all space-flown mice compared to ground controls regardless of strain or exposure duration. Similarly, transcriptomic analysis by RNA-sequencing revealed several pathways that were affected in both strains related to increased lipid metabolism, fatty acid metabolism, lipid and fatty acid processing, lipid catabolic processing, and lipid localization. In addition, key upstream regulators were predicted to be commonly regulated across all conditions including Glucagon (GCG) and Insulin (INS). Moreover, quantitative proteomic analysis showed that a number of lipid related proteins were changed in the livers during spaceflight. Taken together, these data indicate that activation of lipotoxic pathways are the result of space stressors alone and this activation occurs in various genetic backgrounds during spaceflight exposures of weeks to months. If similar responses occur in humans, a prolonged change of these pathways may result in the development of liver disease and should be investigated further.
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19
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Rosa-Caldwell ME, Brown JL, Lee DE, Wiggs MP, Perry RA, Haynie WS, Caldwell AR, Washington TA, Lo WJ, Greene NP. Hepatic alterations during the development and progression of cancer cachexia. Appl Physiol Nutr Metab 2019; 45:500-512. [PMID: 31618604 DOI: 10.1139/apnm-2019-0407] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cancer-associated bodyweight loss (cachexia) is a hallmark of many cancers and is associated with decreased quality of life and increased mortality. Hepatic function can dramatically influence whole-body energy expenditure and may therefore significantly influence whole-body health during cancer progression. The purpose of this study was to examine alterations in markers of hepatic metabolism and physiology during cachexia progression. Male C57BL/6J mice were injected with 1 × 106 Lewis Lung Carcinoma cells dissolved in 100 μL PBS and cancer was allowed to develop for 1, 2, 3, or 4 weeks. Control animals were injected with an equal volume of phosphate-buffered saline. Livers were analyzed for measures of metabolism, collagen deposition, protein turnover, and mitochondrial quality. Animals at 4 weeks had ∼30% larger livers compared with all other groups. Cancer progression was associated with altered regulators of fat metabolism. Additionally, longer duration of cancer development was associated with ∼3-fold increased regulators of collagen deposition as well as phenotypic collagen content, suggesting increased liver fibrosis. Mitochondrial quality control regulators appeared to be altered before any phenotypic alterations to collagen deposition. While induction of Akt was noted, downstream markers of protein synthesis were not altered. In conclusions, cancer cachexia progression is associated with hepatic pathologies, specifically liver fibrosis. Alterations to mitochondrial quality control mechanisms appear to precede this fibrotic phenotype, potentially suggesting mitochondrial mechanisms for the development of hepatic pathologies during the development and progression of cancer cachexia. Novelty Cachexia progression results in liver collagen deposition and fibrosis. Alterations in mitochondrial quality control may precede liver pathologies during cachexia.
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Affiliation(s)
- Megan E Rosa-Caldwell
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - Jacob L Brown
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - David E Lee
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - Michael P Wiggs
- Department of Health and Kinesiology, University of Texas at Tyler, Tyler, TX 75799, USA
| | - Richard A Perry
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas, USA
| | - Wesley S Haynie
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas, USA
| | - Aaron R Caldwell
- Exercise Science Research Center, Department of Health, Human Performance, and Recreation, University of Arkansas, Fayetteville, Arkansas, USA
| | - Tyrone A Washington
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas, USA
| | - Wen-Juo Lo
- Department of Rehabilitation, Human Resources, and Communication Disorders, University of Arkansas, Fayetteville, Arkansas, USA
| | - Nicholas P Greene
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, University of Arkansas, Fayetteville, Arkansas 72701, USA
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20
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Untargeted metabolomic profiling of urine from healthy dogs and dogs with chronic hepatic disease. PLoS One 2019; 14:e0217797. [PMID: 31150490 PMCID: PMC6544284 DOI: 10.1371/journal.pone.0217797] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 05/18/2019] [Indexed: 12/12/2022] Open
Abstract
Chronic hepatic disease can present a diagnostic challenge with different etiologies being associated with similar clinical and laboratory findings. The histopathological assessment of a liver biopsy specimen is usually required in order to make a definitive diagnosis and the availability of non-invasive prognostic biomarkers is limited. The emerging science of metabolomics is used to detect changes in endogenous low molecular weight metabolites in biological samples and offers the possibility of identifying noninvasive markers of disease. The objective of this study was to investigate differences in the urine metabolome between healthy dogs, dogs with chronic hepatitis, dogs with hepatocellular carcinoma, and dogs with a congenital portosystemic shunt. Stored urine samples from 10 healthy dogs, 10 dogs with chronic hepatitis, 6 dogs with hepatocellular carcinoma, and 5 dogs with a congenital portosystemic shunt were analyzed. The urine metabolome was analyzed by gas chromatography–quadrupole time of flight mass spectrometry and 220 known metabolites were identified. Principal component analysis and heat dendrogram plots of the metabolomics data showed clustering between groups. Random forest analysis showed differences in the abundance of various metabolites including putrescine, gluconic acid, sorbitol, and valine. Based on univariate statistics, 37 metabolites were significantly different between groups. In, conclusion, the urine metabolome varies between healthy dogs, dogs with chronic hepatitis, dogs with hepatocellular carcinoma, and dogs with a congenital portosystemic shunt. Further targeted assessment of these metabolites is needed to assess their diagnostic utility.
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21
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Lawrence YA, Bishop MA, Honneffer JB, Cook AK, Rodrigues-Hoffmann A, Steiner JM, Suchodolski JS, Lidbury JA. Untargeted metabolomic profiling of serum from dogs with chronic hepatic disease. J Vet Intern Med 2019; 33:1344-1352. [PMID: 30891842 PMCID: PMC6524095 DOI: 10.1111/jvim.15479] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/05/2019] [Indexed: 12/26/2022] Open
Abstract
Background Chronic hepatopathies present a diagnostic challenge, with different diseases being associated with similar clinical and laboratory findings. Characterization of dogs with chronic hepatopathies can be difficult and require costly diagnostic procedures such as acquisition of a liver biopsy specimen. Noninvasive and inexpensive biomarkers that reliably characterize chronic hepatopathies such as chronic hepatitis or a congenital portosystemic vascular anomaly may decrease the need for costly or invasive diagnostic testing and guide novel therapeutic interventions. Objective To investigate differences in the serum metabolome among healthy dogs, dogs with congenital portosystemic shunts, and dogs with chronic hepatitis. Animals Stored serum samples from 12 healthy dogs, 10 dogs with congenital portosystemic shunts, and 6 dogs with chronic hepatitis were analyzed. Methods The serum metabolome was analyzed with an untargeted metabolomics approach using gas chromatography–quadrupole time of flight mass spectrometry. Results Principal component analysis and heat dendrogram plots of the metabolomics data showed clustering among individuals in each group. Random forest analysis showed differences in the abundance of various metabolites including increased aromatic amino acids and xylitol in dogs with congenital portosystemic shunts. Based on the univariate statistics, 50 metabolites were significantly different among groups. Conclusions and Clinical Importance The serum metabolome varies among healthy dogs, dogs with congenital portosystemic shunts, and dogs with chronic hepatitis. Statistical analysis identified several metabolites that differentiated healthy dogs from dogs with vascular or parenchymal liver disease. Further targeted assessment of these metabolites is needed to confirm their diagnostic reliability.
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Affiliation(s)
- Yuri A Lawrence
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Micah A Bishop
- Wave Veterinary Internal Medicine of Southwest Florida, Naples, Florida
| | - Julia B Honneffer
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Audrey K Cook
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Aline Rodrigues-Hoffmann
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Jörg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Jonathan A Lidbury
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
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Bijnen M, van Greevenbroek MMJ, van der Kallen CJH, Scheijen JL, van de Waarenburg MPH, Stehouwer CDA, Wouters K, Schalkwijk CG. Hepatic Fat Content and Liver Enzymes Are Associated with Circulating Free and Protein-Bound Advanced Glycation End Products, Which Are Associated with Low-Grade Inflammation: The CODAM Study. J Diabetes Res 2019; 2019:6289831. [PMID: 31218233 PMCID: PMC6536997 DOI: 10.1155/2019/6289831] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/28/2019] [Accepted: 03/05/2019] [Indexed: 01/11/2023] Open
Abstract
Advanced glycation end products (AGEs) accumulate in fatty livers and may contribute to low-grade inflammation (LGI), potentially via their receptor, RAGE. It is unknown if the AGE accumulation in fatty livers results in elevated circulating AGEs. In a cohort study, we investigated the association of liver fat and hepatocellular damage with circulating AGEs and soluble RAGE (sRAGE) and subsequently the association of circulating AGEs and sRAGE with LGI. Cross-sectional associations of liver fat percentage (eLF%; ln-transformed) and liver enzymes (LE score; standardized) with circulating AGEs (free CML, CEL, and MG-H1 in nM and protein-bound CML, CEL, and pentosidine in nmol/mmol lysine; ln-transformed) and sRAGE (pg/ml, ln-transformed) and additionally of AGEs and sRAGE with LGI (standardized) were determined by multiple linear regression. eLF% was positively associated with circulating free CEL (β = 0.090; 95% CI 0.041; 0.139) but inversely with protein-bound CML (β = -0.071; 95% CI -0.108; -0.034). Similarly, the LE score was positively associated with free CML (β = 0.044; 95% CI 0.012; 0.076) and CEL (β = 0.040; 95% CI 0.009; 0.072) but inversely with protein-bound CML (β = -0.037; 95% CI -0.060; -0.013). Free CML (β = 0.297; 95% CI 0.049; 0.545) was positively associated with LGI, while protein-bound CML (β = -0.547; 95% CI -0.888; -0.207) was inversely associated, although this association was absent after adjustment for BMI. eLF% and LE score were not associated with sRAGE and sRAGE not with LGI after adjustment for BMI. Liver fat and enzymes were positively associated with circulating free AGEs, which were associated with LGI. In contrast, inverse relations were observed of liver fat and enzymes with circulating protein-bound AGEs and of protein-bound AGEs with LGI. These data suggest that hepatic steatosis and inflammation affect the formation and degradation of hepatic protein-bound AGEs resulting in elevated circulating free AGE levels. These alterations in AGE levels might influence LGI, but this is likely independent of RAGE.
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Affiliation(s)
- Mitchell Bijnen
- Department of Internal Medicine, MUMC, Maastricht, Netherlands
- CARIM, MUMC, Maastricht, Netherlands
| | | | | | - Jean L. Scheijen
- Department of Internal Medicine, MUMC, Maastricht, Netherlands
- CARIM, MUMC, Maastricht, Netherlands
| | | | - Coen D. A. Stehouwer
- Department of Internal Medicine, MUMC, Maastricht, Netherlands
- CARIM, MUMC, Maastricht, Netherlands
| | - Kristiaan Wouters
- Department of Internal Medicine, MUMC, Maastricht, Netherlands
- CARIM, MUMC, Maastricht, Netherlands
| | - Casper G. Schalkwijk
- Department of Internal Medicine, MUMC, Maastricht, Netherlands
- CARIM, MUMC, Maastricht, Netherlands
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Salem ESB, Murakami K, Takahashi T, Bernhard E, Borra V, Bethi M, Nakamura T. Isolation of Primary Mouse Hepatocytes for Nascent Protein Synthesis Analysis by Non-radioactive L-azidohomoalanine Labeling Method. J Vis Exp 2018. [PMID: 30417869 DOI: 10.3791/58323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Hepatocytes are parenchymal cells of the liver and engage multiple metabolic functions, including synthesis and secretion of proteins essential for systemic energy homeostasis. Primary hepatocytes isolated from the murine liver constitute a valuable biological tool to understand the functional properties or alterations occurring in the liver. Herein we describe a method for the isolation and culture of primary mouse hepatocytes by performing a two-step collagenase perfusion technique and discuss their utilization for investigating protein metabolism. The liver of an adult mouse is sequentially perfused with ethylene glycol-bis tetraacetic acid (EGTA) and collagenase, followed by the isolation of hepatocytes with the density gradient buffer. These isolated hepatocytes are viable on culture plates and maintain the majority of endowed characteristics of hepatocytes. These hepatocytes can be used for assessments of protein metabolism including nascent protein synthesis with non-radioactive reagents. We show that the isolated hepatocytes are readily controlled and comprise a higher quality and volume stability of protein synthesis linked to energy metabolism by utilizing the chemo-selective ligation reaction with a Tetramethylrhodamine (TAMRA) protein detection method and western blotting analyses. Therefore, this method is valuable for investigating hepatic nascent protein synthesis linked to energy homeostasis. The following protocol outlines the materials and methods for the isolation of high-quality primary mouse hepatocytes and detection of nascent protein synthesis.
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Affiliation(s)
- Esam S B Salem
- Department of Pharmacology and Systems Physiology, College of Medicine, University of Cincinnati; Division of Endocrinology, Cincinnati Children's Hospital Medical Center
| | - Kazutoshi Murakami
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center
| | | | - Elise Bernhard
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center
| | - Vishnupriya Borra
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center
| | - Mridula Bethi
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center
| | - Takahisa Nakamura
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center; Division of Developmental Biology, Cincinnati Children's Hospital Medical Center; Department of Pediatrics, College of Medicine, University of Cincinnati;
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Tajiri K, Shimizu Y. Branched-chain amino acids in liver diseases. Transl Gastroenterol Hepatol 2018; 3:47. [PMID: 30148232 PMCID: PMC6088198 DOI: 10.21037/tgh.2018.07.06] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 07/06/2018] [Indexed: 02/05/2023] Open
Abstract
Branched chain amino acids (BCAAs) are involved in various bioprocess such as protein metabolism, gene expression, insulin resistance and proliferation of hepatocytes. BCAAs have also been reported to suppress the growth of hepatocellular carcinoma (HCC) cells in vitro and to be required for immune cells to perform the function. In advanced cirrhotic patients, it has been clarified that serum concentrations of BCAA are decreased, whereas those of aromatic amino acids (AAAs) are increased. These alterations are thought to be the causes of hepatic encephalopathy (HE), sarcopenia and hepatocarcinogenesis and may be associated with the poor prognosis of patients with these conditions. Administration of BCAA-rich medicines has shown positive results in patients with cirrhosis.
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Affiliation(s)
- Kazuto Tajiri
- Department of Gastroenterology, Toyama University Hospital, Toyama, Japan
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25
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Gogoi N, Gogoi A, Neog B, Baruah D, Singh KD. Evaluation of Antioxidant and Hepatoprotective Activity of Fruit Rind Extract of Garcinia dulcis (Roxburgh) Kurz. Pharmacognosy Res 2017; 9:266-272. [PMID: 28827968 PMCID: PMC5541483 DOI: 10.4103/0974-8490.210330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Garcinia spp. belongs to the family Clusiaceae has been traditionally used for the treatment of many ailments including the liver damage. Garcinia dulcis found in North Eastern region of Assam; India can be a potential candidature to combat different ailments. Objective: The present work has been designed in such a way to appraisal the antioxidant and hepatoprotective activity of fruit rind extract of this plant. MATERIALS AND METHODS The antioxidant activity was investigated through the various in vitro models, namely, 2,2-diphenyl-1-picrylhydrazine, 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid, nitrite oxide. Phytochemical investigation for total phenolic and flavonoids contents were carried out by standard protocol. For the evaluation of hepatoprotective activity, albino Wistar rats were divided into five groups, five animals per group and activity was determined by measuring the contents of liver function marker enzymes such as serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), serum alkaline phosphatase (ALP), and biochemical parameter, that is, Bilirubin and total protein. Histopathology observation of liver sections was conducted. RESULTS Phytochemical investigation revealed the presence of both phenolic and flavonoid groups in the extract in a significant amount. Antioxidant activity of the plant extract was observed in all models and percentage of inhibition was dose-dependent. Intoxicated with carbon tetrachloride, elevated the liver function enzymes, bilirubin, and suppressed the production of total protein. Pretreatment with the extract decreased the SGOT, SGPT, ALP, and bilirubin level significantly and increased the production level of total protein in a dose-dependent manner. The histopathological observation supported the hepatoprotective potentiality of the extract. CONCLUSION The results indicate that fruit rind part of G. dulcis is nontoxic and the plant can utilize as an antioxidant source. The plant has a protective agent for liver damages and other diseases caused by free radicals. SUMMARY In vitro antioxidant and in vivo hepatoprotective activity was evaluatedMethanolic extract was subjected to quantify the both phenolic and flavonoid contents. The extract showed the significant amount of both phenolic and flavonoids contents. The extract showed the free radical scavenging activity in 2,2-diphenyl-1-picrylhydrazine, 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid and nitrite oxide modelsThe extract was administrated against the carbon tetrachloride intoxicated animal models to evaluate the hepatoprotective activity by determining the level of liver marker enzymes such as serum glutamate pyruvate transaminase, SGOT, alkaline phosphatase and biochemical parameter such as protein and bilirubin. Pretreatment with the extract reversed the elevated level of the enzymes and increased the protein level in a dose-dependent mannerThe histopathological observations of the liver sections supported the hepatoprotective activity of the extractThe present study revealed that the Garcinia dulcis extract is a good candidature for preventing liver damage and other disease caused by free radicals. Abbreviations Used: DPPH: 2,2-diphenyl-1-picrylhydrazine, ABTS: 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid, SGOT: Serum glutamate oxaloacetate transaminase, SGPT: Serum glutamate pyruvate transaminase, ALP: Serum alkaline phosphatase.
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Affiliation(s)
- Nabajyoti Gogoi
- Centre for Biotechnology and Bioinformatics Dibrugarh University, Dibrugarh, Assam, India
| | - Ankur Gogoi
- Centre for Biotechnology and Bioinformatics Dibrugarh University, Dibrugarh, Assam, India
| | - Bijoy Neog
- Department of Life Sciences, Plant Molecular Biology Laboratory, Dibrugarh University, Dibrugarh, Assam, India
| | - Dibyojyoti Baruah
- Department of Life Sciences, Plant Molecular Biology Laboratory, Dibrugarh University, Dibrugarh, Assam, India
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Nojiri S, Fujiwara K, Shinkai N, Iio E, Joh T. Effects of branched-chain amino acid supplementation after radiofrequency ablation for hepatocellular carcinoma: A randomized trial. Nutrition 2017; 33:20-27. [PMID: 27908546 DOI: 10.1016/j.nut.2016.07.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 06/29/2016] [Accepted: 07/14/2016] [Indexed: 02/07/2023]
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27
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Tajiri K, Shimizu Y. Branched-chain amino acids in liver diseases. World J Gastroenterol 2013; 19:7620-7629. [PMID: 24282351 PMCID: PMC3837260 DOI: 10.3748/wjg.v19.i43.7620] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 08/02/2013] [Accepted: 09/17/2013] [Indexed: 02/06/2023] Open
Abstract
Branched chain amino acids (BCAAs) have been shown to affect gene expression, protein metabolism, apoptosis and regeneration of hepatocytes, and insulin resistance. They have also been shown to inhibit the proliferation of liver cancer cells in vitro, and are essential for lymphocyte proliferation and dendritic cell maturation. In patients with advanced chronic liver disease, BCAA concentrations are low, whereas the concentrations of aromatic amino acids such as phenylalanine and tyrosine are high, conditions that may be closely associated with hepatic encephalopathy and the prognosis of these patients. Based on these basic observations, patients with advanced chronic liver disease have been treated clinically with BCAA-rich medicines, with positive effects.
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Martiskainen H, Haapasalo A, Kurkinen KMA, Pihlajamäki J, Soininen H, Hiltunen M. Targeting ApoE4/ApoE receptor LRP1 in Alzheimer's disease. Expert Opin Ther Targets 2013; 17:781-94. [PMID: 23573918 DOI: 10.1517/14728222.2013.789862] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Progressive neuronal loss is a key feature in Alzheimer's disease (AD), which is the most common neurodegenerative disorder in the aging population. Currently, there are no therapeutic means to intervene neuronal damage in AD and therefore innovative approaches to discover novel strategies for the treatment of AD are needed. Based on the prevailing amyloid cascade hypothesis, it is conceivable that lowering the β-amyloid (Aβ) levels is sufficient to slow down the disease process, if started early enough. AREAS COVERED Here, we review genetic and biological functions related to apolipoprotein E (ApoE) and low-density lipoprotein receptor-related protein 1 receptor (LRP1)-mediated clearance of Aβ. Furthermore, we discuss the AD-related therapeutic potential of targeting to ApoE receptor LRP1 at the blood-brain barrier (BBB) and in the periphery. EXPERT OPINION Due to the recent setbacks in the clinical trials targeting AD, it is instrumental to seek alternative therapeutic approaches, which aim to reduce the accumulation of Aβ in the brain tissue. As the ApoE/LRP1-mediated clearance of Aβ across the BBB is the key event in the regulation of Aβ transcytosis from brain to periphery, direct targeting of this protein entity at the BBB holds a great potential in the treatment of AD.
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Affiliation(s)
- Henna Martiskainen
- Kuopio University Hospital, Institute of Clinical Medicine-Neurology, University of Eastern Finland and Department of Neurology, Kuopio, Finland
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29
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Sagare AP, Deane R, Zlokovic BV. Low-density lipoprotein receptor-related protein 1: a physiological Aβ homeostatic mechanism with multiple therapeutic opportunities. Pharmacol Ther 2012; 136:94-105. [PMID: 22820095 PMCID: PMC3432694 DOI: 10.1016/j.pharmthera.2012.07.008] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 07/03/2012] [Indexed: 11/29/2022]
Abstract
Low-density lipoprotein receptor-related protein-1 (LRP1) is the main cell surface receptor involved in brain and systemic clearance of the Alzheimer's disease (AD) toxin amyloid-beta (Aβ). In plasma, a soluble form of LRP1 (sLRP1) is the major transport protein for peripheral Aβ. LRP1 in brain endothelium and mural cells mediates Aβ efflux from brain by providing a transport mechanism for Aβ across the blood-brain barrier (BBB). sLRP1 maintains a plasma 'sink' activity for Aβ through binding of peripheral Aβ which in turn inhibits re-entry of free plasma Aβ into the brain. LRP1 in the liver mediates systemic clearance of Aβ. In AD, LRP1 expression at the BBB is reduced and Aβ binding to circulating sLRP1 is compromised by oxidation. Cell surface LRP1 and circulating sLRP1 represent druggable targets which can be therapeutically modified to restore the physiological mechanisms of brain Aβ homeostasis. In this review, we discuss how increasing LRP1 expression at the BBB and liver with lifestyle changes, statins, plant-based active principles and/or gene therapy on one hand, and how replacing dysfunctional plasma sLRP1 on the other regulate Aβ clearance from brain ultimately controlling the onset and/or progression of AD.
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Affiliation(s)
- Abhay P. Sagare
- Department of Physiology and Biophysics, and Center for Neurodegeneration and Regeneration at the Zilkha Neurogenetic Institute, University of Southern California, Keck School of Medicine, 1501 San Pablo Street, Los Angeles, CA 90089, United States
| | - Rashid Deane
- Department of Neurosurgery, Arthur Kornberg Medical Research Building, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Berislav V. Zlokovic
- Department of Physiology and Biophysics, and Center for Neurodegeneration and Regeneration at the Zilkha Neurogenetic Institute, University of Southern California, Keck School of Medicine, 1501 San Pablo Street, Los Angeles, CA 90089, United States
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30
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Kawaguchi T, Izumi N, Charlton MR, Sata M. Branched-chain amino acids as pharmacological nutrients in chronic liver disease. Hepatology 2011; 54:1063-70. [PMID: 21563202 DOI: 10.1002/hep.24412] [Citation(s) in RCA: 239] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Accepted: 04/25/2011] [Indexed: 12/12/2022]
Abstract
Branched-chain amino acids (BCAAs) are a group of essential amino acids comprising valine, leucine, and isoleucine. A low ratio of plasma BCAAs to aromatic amino acids is a physiological hallmark of liver cirrhosis, and BCAA supplementation was originally devised with the intention of normalizing amino acid profiles and nutritional status. However, recent studies on BCAAs have revealed that, in addition to their role as protein constituents, they may have a role as pharmacological nutrients for patients with chronic liver disease. Large-scale, multicenter, randomized, double-blinded, controlled trials on BCAA supplementation have been performed in Italy and Japan, and results demonstrate that BCAA supplementation improves not only nutritional status, but also prognosis and quality of life in patients with liver cirrhosis. Moreover, accumulating experimental evidence suggests that the favorable effects of BCAA supplementation on prognosis may be supported by unforeseen pharmacological actions of BCAAs. This review summarizes the possible effects of BCAAs on albumin synthesis and insulin resistance from clinical and basic viewpoints. We also review the newly discovered clinical impact of BCAAs on hepatocellular carcinoma and the prognosis and quality of life of patients with liver cirrhosis.
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Affiliation(s)
- Takumi Kawaguchi
- Department of Digestive Disease Information and Research, Kurume, Japan.
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31
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Olde Damink SWM, Dejong CHC, Jalan R. Review article: hyperammonaemic and catabolic consequences of upper gastrointestinal bleeding in cirrhosis. Aliment Pharmacol Ther 2009; 29:801-10. [PMID: 19183148 DOI: 10.1111/j.1365-2036.2009.03938.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Upper gastrointestinal (UGI) bleeding in patients with cirrhosis of the liver induces hyperammonaemia and leads to a catabolic cascade that precipitates life-threatening complications. The haemoglobin molecule is unique because it lacks the essential amino acid isoleucine and contains high amounts of leucine and valine. UGI bleed therefore presents the gut with protein of very low biologic value, which may be the stimulus to induce net catabolism. AIM To describe the hyperammonaemic and catabolic consequences of UGI bleeding in cirrhosis. METHODS A semi-structured literature search was performed using PubMed and article references. RESULTS It has recently been proven that ('simulation of ') a UGI bleed in patients with cirrhosis leads to impaired protein synthesis that can be restored by intravenous infusion of isoleucine. This may have therapeutic implications for the function of rapidly dividing cells and short half-life proteins such as clotting factors. Renal and small bowel ammoniagenesis were shown to be the most prominent causes for the hyperammonaemia that resulted from a UGI bleed. This provides an explanation for the therapeutic failure of the current clinical therapies that are aimed at large bowel-derived ammonia production. Isoleucine infusion did not diminish renal ammoniagenesis. CONCLUSIONS New pharmacological therapies to diminish postbleeding hyperammonaemia should target the altered inter-organ ammonia metabolism and promote ammonia excretion and/or increase the excretion of precursors of ammoniagenesis, e.g. l-ornithine-phenylacetate.
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Affiliation(s)
- S W M Olde Damink
- Department of Surgery, Maastricht University Medical Centre and Nutrition & Toxicology Research Institute Maastricht (NUTRIM), Maastricht, The Netherlands.
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32
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Olde Damink SWM, Jalan R, Deutz NEP, Dejong CHC, Redhead DN, Hynd P, Hayes PC, Soeters PB. Isoleucine infusion during "simulated" upper gastrointestinal bleeding improves liver and muscle protein synthesis in cirrhotic patients. Hepatology 2007; 45:560-8. [PMID: 17326149 DOI: 10.1002/hep.21463] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
UNLABELLED Upper gastrointestinal (GI) bleeding in cirrhotic patients has a high incidence of mortality and morbidity. Postbleeding catabolism has been hypothesized to be partly due to the low biological value of hemoglobin, which lacks the essential amino acid isoleucine. The aims were to study the metabolic consequences of a "simulated" upper GI bleed in patients with cirrhosis of the liver and the effects of intravenous infusion of isoleucine. Portal drained viscera, liver, muscle, and kidney protein kinetics were quantified using a multicatheterization technique during routine portography. Sixteen overnight-fasted, metabolically stable patients who received an intragastric infusion of an amino acid solution mimicking hemoglobin every 4 hours were randomized to saline or isoleucine infusion and received a mixture of stable isotopes (L-[ring-2H5]phenylalanine, L-[ring-2H4]tyrosine, and L-[ring-2H2]tyrosine) to determine organ protein kinetics. This simulated bleed resulted in hypoisoleucinemia that was attenuated by isoleucine infusion. Isoleucine infusion during the bleed resulted in a positive net balance of phenylalanine across liver and muscle, whereas renal and portal drained viscera protein kinetics were unaffected. In the control group, no significant effect was shown. CONCLUSION The present study investigated hepatic and portal drained viscera protein metabolism selectively in humans. The data show that hepatic and muscle protein synthesis is stimulated by improving the amino acid composition of the upper GI bleed by simultaneous intravenous isoleucine administration.
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Affiliation(s)
- Steven W M Olde Damink
- Department of Surgery, Academic Hospital, Maastricht University, Maastricht, The Netherlands
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Dawson PA, Gardiner B, Grimmond S, Markovich D. Transcriptional profile reveals altered hepatic lipid and cholesterol metabolism in hyposulfatemic NaS1 null mice. Physiol Genomics 2006; 26:116-24. [PMID: 16621889 DOI: 10.1152/physiolgenomics.00300.2005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Sulfate plays an essential role in human growth and development, and its circulating levels are maintained by the renal Na+-SO42- cotransporter, NaS1. We previously generated a NaS1 knockout (Nas1-/-) mouse, an animal model for hyposulfatemia, that exhibits reduced growth and liver abnormalities including hepatomegaly. In this study, we investigated the hepatic gene expression profile of Nas1-/- mice using oligonucleotide microarrays. The mRNA expression levels of 92 genes with known functional roles in metabolism, cell signaling, cell defense, immune response, cell structure, transcription, or protein synthesis were increased (n = 51) or decreased (n = 41) in Nas1-/- mice when compared with Nas1+/+ mice. The most upregulated transcript levels in Nas1-/- mice were found for the sulfotransferase genes, Sult3a1 (approximately 500% increase) and Sult2a2 (100% increase), whereas the metallothionein-1 gene, Mt1, was among the most downregulated genes (70% decrease). Several genes involved in lipid and cholesterol metabolism, including Scd1, Acly, Gpam, Elov16, Acsl5, Mvd, Insig1, and Apoa4, were found to be upregulated (> or = 30% increase) in Nas1-/- mice. In addition, Nas1-/- mice exhibited increased levels of hepatic lipid (approximately 16% increase), serum cholesterol (approximately 20% increase), and low-density lipoprotein (approximately 100% increase) and reduced hepatic glycogen (approximately 50% decrease) levels. In conclusion, these data suggest an altered lipid and cholesterol metabolism in the hyposulfatemic Nas1-/- mouse and provide new insights into the metabolic state of the liver in Nas1-/- mice.
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Affiliation(s)
- Paul Anthony Dawson
- School of Biomedical Sciences, University of Queensland, St. Lucia, Australia
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34
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Olde Damink SWM, Jalan R, Redhead DN, Hayes PC, Deutz NEP, Soeters PB. Interorgan ammonia and amino acid metabolism in metabolically stable patients with cirrhosis and a TIPSS. Hepatology 2002; 36:1163-71. [PMID: 12395326 DOI: 10.1053/jhep.2002.36497] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ammonia is central to the pathogenesis of hepatic encephalopathy. This study was designed to determine the quantitative dynamics of ammonia metabolism in patients with cirrhosis and previous treatment with a transjugular intrahepatic portosystemic stent shunt (TIPSS). We studied 24 patients with cirrhosis who underwent TIPSS portography. Blood was sampled and blood flows were measured across portal drained viscera, leg, kidney, and liver, and arteriovenous differences across the spleen and the inferior and superior mesenteric veins. The highest amount of ammonia was produced by the portal drained viscera. The kidneys also produced ammonia in amounts that equaled total hepatosplanchnic area production. Skeletal muscle removed more ammonia than the cirrhotic liver. The amount of nitrogen that was taken up by muscle in the form of ammonia was less than the glutamine that was released. The portal drained viscera consumed glutamine and produced ammonia, alanine, and citrulline. Urea was released in the splenic and superior mesenteric vein, contributing to whole-body ureagenesis in these cirrhotic patients. In conclusion, hyperammonemia in metabolically stable, overnight-fasted patients with cirrhosis of the liver and a TIPSS results from portosystemic shunting and renal ammonia production. Skeletal muscle removes more ammonia from the circulation than the cirrhotic liver. Muscle releases excessive amounts of the nontoxic nitrogen carrier glutamine, which can lead to ammonia production in the portal drained viscera (PDV) and kidneys. Urinary ammonia excretion and urea synthesis appear to be the only way to remove ammonia from the body.
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Vintro AQ, Krasnoff JB, Painter P. Roles of nutrition and physical activity in musculoskeletal complications before and after liver transplantation. AACN CLINICAL ISSUES 2002; 13:333-47. [PMID: 12011603 DOI: 10.1097/00044067-200205000-00016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
End-stage liver disease (ESLD) affects thousands of people in the United States annually. Improvements in survival after liver transplantation have broadened the indications for its use as a proven therapy for ESLD, rapidly increasing the number of transplant candidates. However, the number of patients awaiting transplantation far surpasses the donor supply, resulting in lengthy waiting times. During this wait, these patients experience progressive disease-related decompensation that is often accompanied by malnutrition and reduced physical activity. This chronic disease triad can have profound effects on musculoskeletal complications, such as cachexia and osteoporosis. In the absence of proper interventional strategies before transplantation, these complications can intensify after the transplantation, as a result of continued poor nutrition intake, bed rest, and pharmacotherapies. This article discusses levels of physical functioning and nutrition status in both the pre-and post-transplant populations, the risks associated with current levels, and the roles that diet and activity therapies can have to improve outcomes.
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Affiliation(s)
- Andrea Q Vintro
- Department of Physiological Nursing, University of California, San Francisco 94143-0610, USA. )
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Roongpisuthipong C, Sobhonslidsuk A, Nantiruj K, Songchitsomboon S. Nutritional assessment in various stages of liver cirrhosis. Nutrition 2001; 17:761-5. [PMID: 11527674 DOI: 10.1016/s0899-9007(01)00626-8] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The aims of this study were to determine the prevalence of protein-calorie malnutrition, characteristics, and clinical importance of nutrition disorders in patients with liver cirrhosis according to severity of disease. METHODS Nutrition assessments such as subjective global assessment, anthropometric and biochemical measurements, immunocompentency, thiamin and riboflavin status in 60 patients with cirrhosis (33 male and 27 female) were recorded between June 1999 and December 1999 at an outpatient clinic at Ramathibodi Hospital, Bangkok, Thailand. The origin of liver disease was alcohol related in 50% of patients. Child-Pugh criteria were used to establish the severity of liver disease. RESULTS In terms of energy malnutrition, 13.3% of patients had ideal body weights below 90% and 11.7% had body mass indexes below 18.5 kg/m(2). Protein malnutrition (low albumin) and immunoincompetence (abnormal response to skin tests) were found much more frequently (45% and 22%) than energy malnutrition. Patients with alcoholic cirrhosis had ascites (P < 0.05) and hepatic encephalopathy (P < 0.001) more frequently and less triceps skinfold thickness than those with non-alcoholic cirrhosis. Subjective global assessment and serum proteins correlated with the degree of liver-function impairment, but immunologic tests correlated inversely in cirrhosis patients. Mean values for creatinine-height index, hemoglobin, cholesterol, and complement C4 showed significant decreases in severe liver failure (Child-Pugh class C) only in patients with alcoholic cirrhosis (P < 0.05). Malnutrition was correlated with the clinical severity of liver disease. CONCLUSIONS The study showed that protein-energy malnutrition is a common complication of liver cirrhosis. Nutritional disorders appeared to be related to the degree of liver injury and the etiology of nutritional disorders. Nutritional disorders were more severe with alcoholic cirrhosis than with non-alcoholic cirrhosis.
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Affiliation(s)
- C Roongpisuthipong
- Department of Medicine and the Research Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
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Abstract
Between one- and two-thirds of all alcohol abusers have impairment of muscle function that may be accompanied by biochemical lesions and/or the presence of a defined myopathy characterised by selective atrophy of Type II fibres. Perturbations in protein metabolism are central to the effects on muscle and account for the reductions in muscle mass and fibre diameter. Ethanol abuse is also associated with abnormalities in carbohydrate (as well as lipid) metabolism in skeletal muscle. Ethanol-mediated insulin resistance is allied with the inhibitory effects of ethanol on insulin-stimulated carbohydrate metabolism. It acutely impairs insulin-stimulated glucose and lipid metabolism, although it is not known whether it has an analogous effect on insulin-stimulated protein synthesis. In alcoholic cirrhosis, insulin resistance occurs with respect to carbohydrate metabolism, although the actions of insulin to suppress protein degradation and stimulate amino acid uptake are unimpaired. In acute alcohol-dosing studies defective rates of protein synthesis occur, particularly in Type II fibre-predominant muscles. The relative amounts of mRNA-encoding contractile proteins do not appear to be adversely affected by chronic alcohol feeding, although subtle changes in muscle protein isoforms may occur. There are also rapid and sustained reductions in total (largely ribosomal) RNA in chronic studies. Loss of RNA appears to be related to increases in the activities of specific muscle RNases in these long-term studies. However, in acute dosing studies (less than 1 day), the reductions in muscle protein synthesis are not due to overt loss of total RNA. These data implicate a role for translational modifications in the initial stages of the myopathy, although changes in transcription and/or protein degradation may also be superimposed. These events have important implications for whole-body metabolism.
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Affiliation(s)
- V R Preedy
- Department of Nutrition and Dietetics, King's College London, 150 Stamford Street, SE1 9NN, London, UK
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Schön MR, Heil W, Benckert C, Matthes M, Akkoc N, Kollmar O, Wolf S, Neuhaus P. Influence of cold and warm ischemia on amino acid profiles after liver transplantation. Transplant Proc 1998; 30:2314-6. [PMID: 9723487 DOI: 10.1016/s0041-1345(98)00636-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- M R Schön
- Department of Surgery, Charité, Humboldt-Universität, Berlin, Germany
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