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Zhang X, Zhou L, Peng Y, He S, Mao Z, Cai J, Geng A, Yang H, Huang P. Melatonin alleviates brain injury in copper-laden rats: Underlying benefits for Wilson's disease. Biochem Pharmacol 2024:116490. [PMID: 39147330 DOI: 10.1016/j.bcp.2024.116490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 08/05/2024] [Accepted: 08/12/2024] [Indexed: 08/17/2024]
Abstract
Copper serves as an indispensable cofactor for all living organisms, and its excessive accumulation has been associated with a variety of diseases. Wilson's disease (WD) serves as an illustrative example of copper toxicity in humans, frequently presenting with liver and/or neuropsychiatric symptoms. The current therapeutic drugs, penicillamine (PA) and zinc gluconate (ZnG), have constraints, and research on their combination efficacy remains insufficient. It has been reported that melatonin (MLT) plays a vital role in binding to transition metals and exhibits strong antioxidant capacity. To investigate the therapeutic efficacy of MLT and combined treatment, rats were randomly divided into the following seven groups: the control (Con) group, copper-laden model rat (Mod) group, PA-treated group, ZnG-treated group, MLT- treated group, PA-ZnG-treated group, and PA-MLT-treated group. Then potential mechanisms and targets were investigated using a combination of metabolomics and network pharmacology and verified by molecular docking and qPCR. The findings revealed that MLT and the combination significantly improved behavior, pathology and copper levels in copper-laden rats. The results of the metabolomics study showed that profoundly altered metabolites were identified, and alanine, aspartate and glutamate metabolism, pyruvate metabolism, citrate cycle (TCA cycle), and glycolysis/gluconeogenesis were explored. In addition, molecular docking showed that MLT had high binding affinity with key targets, and qPCR results revealed that MLT could reverse the mRNA expression of targets GOT2 and PKM2. It was concluded that MLT effectively improves brain injury in copper-laden rats, and this effect was linked with the altered features of the metabolite profiles.
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Affiliation(s)
- Xiaodan Zhang
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Lihong Zhou
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Yulong Peng
- Yanjing Medical College, Capital Medical University, Beijing 101300, China
| | - Shiyu He
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Zhen Mao
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Jin Cai
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Aobo Geng
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Hong Yang
- Yanjing Medical College, Capital Medical University, Beijing 101300, China
| | - Peili Huang
- School of Public Health and Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China.
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Lavrut PM, Guillaud O, Dumortier J, Mintz E, Brun V, Heissat S, Couchonnal Bedoya E, Lachaux A, Bost M, Hervieu V. Histological features of liver disease development in the Atp7b -/- mouse: a model of Wilson's disease. J Clin Pathol 2023:jcp-2023-209190. [PMID: 37968102 DOI: 10.1136/jcp-2023-209190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 10/25/2023] [Indexed: 11/17/2023]
Abstract
AIMS Wilson's disease (WD) is caused by mutations in the ATP7B gene, resulting in copper accumulation and toxicity in liver and brain tissues. Due to the initial asymptomatic liver involvement, the progression of liver injuries in WD stays primarily unknown. Atp7b-/- knockout mice have been shown to be an appropriate model of WD for liver involvement. METHODS A total of 138 Atp7b-/- mice were included and separated into five groups according to age as follows: 6, 20, 39 and 50 weeks without treatment, and 50 weeks with copper chelator treatment from 39 to 50 weeks of age and compared with 101 wild-type (WT) mice at the same stages. The evolution of histological liver lesions was analysed and compared between groups. RESULTS Significant changes were observed in Atp7b-/- mice compared with WT. Copper deposits in hepatocytes appeared as early as 6 weeks but no significant increase over time was observed. Inflammation appeared as early as 6 weeks and progressed henceforth. Lobular and periportal acidophilic bodies appeared after 20 weeks. Significant atypia was also observed at 20 weeks and increased over time to reach a severe stage at 39 weeks. Fibrosis also became apparent at 20 weeks, progressing subsequently to precirrhotic stages at 50 weeks. Copper content, inflammation and fibrosis scores were significantly reduced in the treated group. No bile duct lesions or dysplastic changes were noted. CONCLUSIONS Copper accumulation leads to progressive changes in Atp7b-/- mice regarding inflammation, fibrosis and atypia. The severity of liver damage is lessened by chelation therapy.
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Affiliation(s)
- Pierre-Marie Lavrut
- Department of Pathology, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
| | - Olivier Guillaud
- National Reference Center for Wilson's disease, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
- Ramsay Générale de Santé, Clinique de la Sauvegarde, Lyon, Rhône-Alpes, France
| | - Jérôme Dumortier
- Department of digestive diseases, Hospices Civils de Lyon, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
- Université de Lyon, Lyon, Auvergne-Rhône-Alpes, France
| | - Elisabeth Mintz
- CEA, CNRS, IRIG, LCBM, Universite Grenoble Alpes, Grenoble, Auvergne-Rhône-Alpes, France
| | - Virginie Brun
- CEA, Inserm, IRIG, BioSanté U1292, University Grenoble Alpes, Grenoble, Auvergne-Rhône-Alpes, France
| | - Sophie Heissat
- National Reference Center for Wilson's disease, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
| | - Eduardo Couchonnal Bedoya
- National Reference Center for Wilson's disease, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
| | - Alain Lachaux
- National Reference Center for Wilson's disease, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
- Université de Lyon, Lyon, Auvergne-Rhône-Alpes, France
| | - Muriel Bost
- National Reference Center for Wilson's disease, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
- Laboratory of Trace Element and Toxic Metal Analysis, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
| | - Valerie Hervieu
- Department of Pathology, Hospices Civils de Lyon, Lyon, Auvergne-Rhône-Alpes, France
- Université de Lyon, Lyon, Auvergne-Rhône-Alpes, France
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3
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Wooton-Kee CR. Therapeutic implications of impaired nuclear receptor function and dysregulated metabolism in Wilson's disease. Pharmacol Ther 2023; 251:108529. [PMID: 37741465 PMCID: PMC10841433 DOI: 10.1016/j.pharmthera.2023.108529] [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: 05/29/2023] [Revised: 07/29/2023] [Accepted: 09/08/2023] [Indexed: 09/25/2023]
Abstract
Copper is an essential trace element that is required for the activity of many enzymes and cellular processes, including energy homeostasis and neurotransmitter biosynthesis; however, excess copper accumulation results in significant cellular toxicity. The liver is the major organ for maintaining copper homeostasis. Inactivating mutations of the copper-transporting P-type ATPase, ATP7B, result in Wilson's disease, an autosomal recessive disorder that requires life-long medicinal therapy or liver transplantation. Current treatment protocols are limited to either sequestration of copper via chelation or reduction of copper absorption in the gut (zinc therapy). The goal of these strategies is to reduce free copper, redox stress, and cellular toxicity. Several lines of evidence in Wilson's disease animal models and patients have revealed altered hepatic metabolism and impaired hepatic nuclear receptor activity. Nuclear receptors are transcription factors that coordinate hepatic metabolism in normal and diseased livers, and several hepatic nuclear receptors have decreased activity in Wilson's disease and Atp7b-/- models. In this review, we summarize the basic physiology that underlies Wilson's disease pathology, Wilson's disease animal models, and the possibility of targeting nuclear receptor activity in Wilson's disease patients.
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Affiliation(s)
- Clavia Ruth Wooton-Kee
- Baylor College of Medicine, Department of Pediatrics-Nutrition, Children's Nutrition Research Center, Houston, TX, United States of America.
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4
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Du J, Huang Z, Li Y, Ren X, Zhou C, Liu R, Zhang P, Lei G, Lyu J, Li J, Tan G. Copper exerts cytotoxicity through inhibition of iron-sulfur cluster biogenesis on ISCA1/ISCA2/ISCU assembly proteins. Free Radic Biol Med 2023:S0891-5849(23)00433-1. [PMID: 37225108 DOI: 10.1016/j.freeradbiomed.2023.05.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 05/01/2023] [Accepted: 05/15/2023] [Indexed: 05/26/2023]
Abstract
Copper is an essential mineral nutrient that provides the cofactors for some key enzymes. However, excess copper is paradoxically cytotoxic. Wilson's disease is an autosomal recessive hereditary disease characterized by pathological copper accumulation in many organs, with high mortality and disability. Nevertheless, many questions about the molecular mechanism in Wilson's disease remain unknown and there is an imperative need to address these questions to better exploit therapeutic strategy. In this study, we constructed the mouse model of Wilson's disease, ATP7A-/- immortalized lymphocyte cell line and ATP7B knockdown cells to explore whether copper could impair iron-sulfur cluster biogenesis in eukaryotic mitochondria. Through a series of cellular, molecular, and pharmacological analyses, we demonstrated that copper could suppress the assembly of Fe-S cluster, decrease the activity of the Fe-S enzyme and disorder the mitochondrial function both in vivo and in vitro. Mechanistically, we found that human ISCA1, ISCA2 and ISCU proteins have a strong copper-binding activity, which would hinder the process of iron-sulfur assembly. Of note, we proposed a novel mechanism of action to explain the toxicity of copper by providing evidence that iron-sulfur cluster biogenesis may be a primary target of copper toxicity both in cells and mouse models. In summary, the current work provides an in-depth study on the mechanism of copper intoxication and describes a framework for the further understanding of impaired Fe-S assembly in the pathological processes of Wilson's diseases, which helps to develop latent therapeutic strategies for the management of copper toxicity.
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Affiliation(s)
- Jing Du
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China; Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China
| | - Zhaoyang Huang
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430060, China
| | - Yanchun Li
- Department of Central Laboratory, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310006, China
| | - Xueying Ren
- Department of Laboratory Medicine, The Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310005, China
| | - Chaoting Zhou
- Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China
| | - Ruolan Liu
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China
| | - Ping Zhang
- Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China
| | - Guojie Lei
- Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China
| | - Jianxin Lyu
- Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
| | - Jianghui Li
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China.
| | - Guoqiang Tan
- Key Laboratory of Laboratory Medicine, Ministry of Education, Zhejiang Provincial Key Laboratory of Medical Genetics, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China; Laboratory Medicine Center, Department of Clinical Laboratory, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
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5
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Gao Y, Yu T, Ai F, Ji C, Wu Y, Huang X, Zheng X, Yan F. Bacillus coagulans XY2 ameliorates copper-induced toxicity by bioadsorption, gut microbiota and lipid metabolism regulation. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130585. [PMID: 37055990 DOI: 10.1016/j.jhazmat.2022.130585] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/07/2022] [Accepted: 12/07/2022] [Indexed: 06/19/2023]
Abstract
Excessive copper pollutes the environment and endangers human health, attracting plenty of global attention. In this study, a novel strain named Bacillus coagulans XY2 was discovered to have a great copper tolerance and adsorption capacity. B. coagulans XY2 might maintain copper homeostasis through multisystem synergies of copper resistance, sulfur metabolism, Fe-S cluster assembly, and siderophore transport. In mice, by promoting the expression of SREBF-1 and SREBF-2 and their downstream genes, B. coagulans XY2 significantly inhibited the copper-induced decrease in weight growth rate, ameliorated dyslipidemia, restored total cholesterol and triglyceride contents both in serum and liver. Furthermore, B. coagulans XY2 recovered the diversity of gut microbiota and suppressed the copper-induced reduction in the ratio of Firmicutes to Bacteroidota. Serum metabolomics analysis showed that the alleviating effect of B. coagulans XY2 on copper toxicity was mainly related to lipid metabolism. For the first time, we demonstrated mechanisms of copper toxicity mitigation by B. coagulans XY2, which was related to self-adsorption, host copper excretion promotion, and lipid metabolism regulation. Moreover, working model of B. coagulans XY2 on copper homeostasis was predicted by whole-genome analysis. Our study provides a new solution for harmfulness caused by copper both in human health and the environment.
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Affiliation(s)
- Yufang Gao
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Ting Yu
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Fang Ai
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Chen Ji
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Yalan Wu
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Xuedi Huang
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Xiaodong Zheng
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Fujie Yan
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
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6
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Guttmann S, Nadzemova O, Grünewald I, Lenders M, Brand E, Zibert A, Schmidt HH. ATP7B knockout disturbs copper and lipid metabolism in Caco-2 cells. PLoS One 2020; 15:e0230025. [PMID: 32155648 PMCID: PMC7064347 DOI: 10.1371/journal.pone.0230025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 02/18/2020] [Indexed: 12/30/2022] Open
Abstract
Intestinal cells control delivery of lipids to the body by adsorption, storage and secretion. Copper (Cu) is an important trace element and has been shown to modulate lipid metabolism. Mutation of the liver Cu exporter ATP7B is the cause of Wilson disease and is associated with Cu accumulation in different tissues. To determine the relationship of Cu and lipid homeostasis in intestinal cells, a CRISPR/Cas9 knockout of ATP7B (KO) was introduced in Caco-2 cells. KO cells showed increased sensitivity to Cu, elevated intracellular Cu storage, and induction of genes regulating oxidative stress. Chylomicron structural protein ApoB48 was significantly downregulated in KO cells by Cu. Apolipoproteins ApoA1, ApoC3 and ApoE were constitutively induced by loss of ATP7B. Formation of small sized lipid droplets (LDs) was enhanced by Cu, whereas large sized LDs were reduced. Cu reduced triglyceride (TG) storage and secretion. Exposure of KO cells to oleic acid (OA) resulted in enhanced TG storage. The findings suggest that Cu represses intestinal TG lipogenesis, while loss of ATP7B results in OA-induced TG storage.
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Affiliation(s)
- Sarah Guttmann
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Münster, Germany
| | - Oksana Nadzemova
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Münster, Germany
| | - Inga Grünewald
- Gerhard-Domagk-Institute of Pathology, University Hospital Muenster, Münster, Germany
| | - Malte Lenders
- Department of Nephrology, Hypertension and Rheumatology, Internal Medicine D, University Hospital Muenster, Münster, Germany
| | - Eva Brand
- Department of Nephrology, Hypertension and Rheumatology, Internal Medicine D, University Hospital Muenster, Münster, Germany
| | - Andree Zibert
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Münster, Germany
| | - Hartmut H. Schmidt
- Medizinische Klinik B für Gastroenterologie und Hepatologie, Universitätsklinikum Münster, Münster, Germany
- * E-mail:
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7
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Abstract
Copper accumulation and deficiency are reciprocally connected to lipid metabolism. In Wilson disease (WD), which is caused by a genetic loss of function of the copper-transporting P-type ATPase beta, copper accumulates mainly in the liver and lipid metabolism is dysregulated. The underlying mechanisms linking copper and lipid metabolism in WD are not clear. Copper may impair metabolic machinery by direct binding to protein and lipid structures or by generating reactive oxygen species with consequent damage to cellular organelles vital to energy metabolism. In the liver, copper overload results in mitochondrial impairment, down-regulation of lipid metabolism, and the development of steatosis with an etiology not fully elucidated. Little is known regarding the effect of copper overload on extrahepatic energy homeostasis. This review aims to discuss alterations in hepatic energy metabolism associated with WD, highlights potential mechanisms involved in the development of hepatic and systemic dysregulation of lipid metabolism, and reviews current knowledge on the effects of copper overload on extrahepatic energy metabolism.
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Affiliation(s)
- Tagreed A. Mazi
- Department of Nutrition, University of California Davis, Davis, CA, USA,Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Noreene M. Shibata
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of California Davis, Sacramento, CA, USA
| | - Valentina Medici
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of California Davis, Sacramento, CA, USA,Corresponding author. (V. Medici)
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8
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Tao C, Wang Y, Zhao Y, Pan J, Fan Y, Liang X, Cao C, Zhao J, Petris MJ, Li K, Wang Y. Adipocyte-specific disruption of ATPase copper transporting α in mice accelerates lipoatrophy. Diabetologia 2019; 62:2340-2353. [PMID: 31396659 DOI: 10.1007/s00125-019-4966-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 06/14/2019] [Indexed: 12/17/2022]
Abstract
AIMS/HYPOTHESIS ATPase copper transporting α (ATP7A), also known as Menkes disease protein, is a P-type ATPase that transports copper across cell membranes. The critical role of ATP7A-mediated copper homeostasis has been well recognised in various organs, such as the intestine, macrophages and the nervous system. However, the importance of adipocyte ATP7A-mediated copper homeostasis on fat metabolism is not well understood. Here, we sought to reveal the contribution of adipose ATP7A to whole-body fat metabolism in mice. METHODS We generated adipocyte-specific Atp7a-knockout (ASKO) mice using the Cre/loxP system, with Cre expression driven by the adiponectin promoter. ASKO mice and littermate control mice were aged on a chow diet or fed with a high-fat diet (HFD); body weight, fat mass, and glucose and insulin metabolism were analysed. Histological analysis, transmission electron microscopy and RNA-sequencing (RNA-Seq) analysis of white adipose tissue (WAT) were used to understand the physiological and molecular changes associated with loss of copper homeostasis in adipocytes. RESULTS Significantly increased copper concentrations were observed in adipose tissues of ASKO mice compared with control mice. Aged or HFD-fed ASKO mice manifested a lipoatrophic phenotype characterised by a progressive generalised loss of WAT. Dysfunction of adipose tissues in these ASKO mice was confirmed by decreased levels of both serum leptin and adiponectin and increased levels of triacylglycerol and insulin. Systemic metabolism was also impaired in these mice, as evidenced by a pronounced glucose intolerance, insulin resistance and hepatic steatosis. Moreover, we demonstrate a significant induction of lipolysis and DNA-damage signalling pathways in gonadal WAT from aged and HFD-fed ASKO mice. In vitro studies suggest that copper overload is responsible for increased lipolysis and DNA damage. CONCLUSIONS/INTERPRETATION Our results show a previously unappreciated role of adipocyte Atp7a in the regulation of ageing-related metabolic disease and identify new metallophysiologies in whole-body fat metabolism. DATA AVAILABILITY The datasets generated during the current study are available in the Genome Sequence Archive in BIG Data Center, Beijing Institute of Genomics (BIG), Chinese Academy of Sciences, under accession number CRA001769 (http://bigd.big.ac.cn/gsa).
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Affiliation(s)
- Cong Tao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Yajun Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Ying Zhao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Jianfei Pan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Yiping Fan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Xiaojuan Liang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Chunwei Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Jianguo Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Michael J Petris
- Department of Biochemistry, University of Missouri, Columbia, MO, USA
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
- The Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, USA
| | - Kui Li
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193
| | - Yanfang Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China, 100193.
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9
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Einer C, Leitzinger C, Lichtmannegger J, Eberhagen C, Rieder T, Borchard S, Wimmer R, Denk G, Popper B, Neff F, Polishchuk EV, Polishchuk RS, Hauck SM, von Toerne C, Müller JC, Karst U, Baral BS, DiSpirito AA, Kremer AE, Semrau J, Weiss KH, Hohenester S, Zischka H. A High-Calorie Diet Aggravates Mitochondrial Dysfunction and Triggers Severe Liver Damage in Wilson Disease Rats. Cell Mol Gastroenterol Hepatol 2018; 7:571-596. [PMID: 30586623 PMCID: PMC6407159 DOI: 10.1016/j.jcmgh.2018.12.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 12/13/2018] [Accepted: 12/13/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS In Wilson disease, ATP7B mutations impair copper excretion into bile. Hepatic copper accumulation may induce mild to moderate chronic liver damage or even acute liver failure. Etiologic factors for this heterogeneous phenotype remain enigmatic. Liver steatosis is a frequent finding in Wilson disease patients, suggesting that impaired copper homeostasis is linked with liver steatosis. Hepatic mitochondrial function is affected negatively both by copper overload and steatosis. Therefore, we addressed the question of whether a steatosis-promoting high-calorie diet aggravates liver damage in Wilson disease via amplified mitochondrial damage. METHODS Control Atp7b+/- and Wilson disease Atp7b-/- rats were fed either a high-calorie diet (HCD) or a normal diet. Copper chelation using the high-affinity peptide methanobactin was used in HCD-fed Atp7b-/- rats to test for therapeutic reversal of mitochondrial copper damage. RESULTS In comparison with a normal diet, HCD feeding of Atp7b-/- rats resulted in a markedly earlier onset of clinically apparent hepatic injury. Strongly increased mitochondrial copper accumulation was observed in HCD-fed Atp7b-/- rats, correlating with severe liver injury. Mitochondria presented with massive structural damage, increased H2O2 emergence, and dysfunctional adenosine triphosphate production. Hepatocellular injury presumably was augmented as a result of oxidative stress. Reduction of mitochondrial copper by methanobactin significantly reduced mitochondrial impairment and ameliorated liver damage. CONCLUSIONS A high-calorie diet severely aggravates hepatic mitochondrial and hepatocellular damage in Wilson disease rats, causing an earlier onset of the disease and enhanced disease progression.
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Affiliation(s)
- Claudia Einer
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany; Department of Medicine II, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Christin Leitzinger
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Josef Lichtmannegger
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Carola Eberhagen
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Tamara Rieder
- Institute of Toxicology and Environmental Hygiene, Technical University Munich, Munich, Germany
| | - Sabine Borchard
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Ralf Wimmer
- Department of Medicine II, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Gerald Denk
- Department of Medicine II, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Bastian Popper
- Department of Anatomy and Cell Biology, Biomedical Center, Ludwig-Maximilians-University, Planegg-Martinsried, Germany; Core Facility Animal Models, Biomedical Center, Ludwig-Maximilians-University, Planegg-Martinsried, Germany
| | - Frauke Neff
- Institute of Pathology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | | | | | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Christine von Toerne
- Research Unit Protein Science, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | | | - Uwe Karst
- Institute of Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Bipin S Baral
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa
| | - Alan A DiSpirito
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, Iowa
| | - Andreas E Kremer
- Department of Medicine I, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Jeremy Semrau
- Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, Michigan
| | - Karl Heinz Weiss
- Department of Gastroenterology, Internal Medicine IV, University Hospital Heidelberg, Heidelberg, Germany
| | - Simon Hohenester
- Department of Medicine II, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Hans Zischka
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany; Institute of Toxicology and Environmental Hygiene, Technical University Munich, Munich, Germany.
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10
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Reed E, Lutsenko S, Bandmann O. Animal models of Wilson disease. J Neurochem 2018; 146:356-373. [PMID: 29473169 PMCID: PMC6107386 DOI: 10.1111/jnc.14323] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 02/04/2018] [Accepted: 02/12/2018] [Indexed: 02/06/2023]
Abstract
Wilson disease (WD) is an autosomal recessive disorder of copper metabolism manifesting with hepatic, neurological and psychiatric symptoms. The limitations of the currently available therapy for WD (particularly in the management of neuropsychiatric disease), together with our limited understanding of key aspects of this illness (e.g. neurological vs. hepatic presentation) justify the ongoing need to study WD in suitable animal models. Four animal models of WD have been established: the Long-Evans Cinnamon rat, the toxic-milk mouse, the Atp7b knockout mouse and the Labrador retriever. The existing models of WD all show good similarity to human hepatic WD and have been helpful in developing an improved understanding of the human disease. As mammals, the mouse, rat and canine models also benefit from high homology to the human genome. However, important differences exist between these mammalian models and human disease, particularly the absence of a convincing neurological phenotype. This review will first provide an overview of our current knowledge of the orthologous genes encoding ATP7B and the closely related ATP7A protein in C. elegans, Drosophila and zebrafish (Danio rerio) and then summarise key characteristics of rodent and larger mammalian models of ATP7B-deficiency.
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Affiliation(s)
- Emily Reed
- Sheffield Institute for Translational Neuroscience (SITraN), University of Sheffield, Baltimore, USA
| | | | - Oliver Bandmann
- Sheffield Institute for Translational Neuroscience (SITraN), University of Sheffield, Baltimore, USA
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Bhattacharjee A, Chakraborty K, Shukla A. Cellular copper homeostasis: current concepts on its interplay with glutathione homeostasis and its implication in physiology and human diseases. Metallomics 2018; 9:1376-1388. [PMID: 28675215 DOI: 10.1039/c7mt00066a] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper is a trace element essential for almost all living organisms. But the level of intracellular copper needs to be tightly regulated. Dysregulation of cellular copper homeostasis leading to various diseases demonstrates the importance of this tight regulation. Copper homeostasis is regulated not only within the cell but also within individual intracellular compartments. Inactivation of export machinery results in excess copper being redistributed into various intracellular organelles. Recent evidence suggests the involvement of glutathione in playing an important role in regulating copper entry and intracellular copper homeostasis. Therefore interplay of both homeostases might play an important role within the cell. Similar to copper, glutathione balance is tightly regulated within individual cellular compartments. This review explores the existing literature on the role of glutathione in regulating cellular copper homeostasis. On the one hand, interplay of glutathione and copper homeostasis performs an important role in normal physiological processes, for example neuronal differentiation. On the other hand, perturbation of the interplay might play a key role in the pathogenesis of copper homeostasis disorders.
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Wang C, Liang X, Tao C, Yao X, Wang Y, Wang Y, Li K. Induction of copper and iron in acute cold-stimulated brown adipose tissues. Biochem Biophys Res Commun 2017; 488:496-500. [DOI: 10.1016/j.bbrc.2017.05.073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 05/12/2017] [Indexed: 01/20/2023]
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Sintusek P, Dhawan A. Lipid and copper metabolism in humans with wilson disease: Enigmatic relationship. Hepatology 2017; 65:753-755. [PMID: 27859441 DOI: 10.1002/hep.28936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 07/22/2016] [Accepted: 07/27/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Palittiya Sintusek
- Paediatric Liver, GI and Nutrition Centre, King's College Hospital, London, UK.,Division of Paediatric GI and Hepatology, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, Thailand
| | - Anil Dhawan
- Paediatric Liver, GI and Nutrition Centre, King's College Hospital, London, UK
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Erami K, Tanaka Y, Kawamura S, Miyago M, Sawazaki A, Imaizumi K, Sato M. Dietary Egg Yolk Supplementation Improves Low-Protein-Diet-Induced Fatty Liver in Rats. J Nutr Sci Vitaminol (Tokyo) 2016; 62:240-248. [PMID: 27725409 DOI: 10.3177/jnsv.62.240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Egg yolk is an important source of nutrients and contains different bioactive substances. In the present study, we studied the benefits of egg yolk in preventing low-protein-diet-induced fatty liver in rats. Rats were fed the following diets, which were based on the AIN-76 formula, for 2 wk: an adequate-protein diet containing 20% casein (C), a low-protein diet containing 5% casein (LP-C), a low-protein diet supplemented with 12.5% egg yolk (LP-EY), and a low-protein diet supplemented with 4.1% egg yolk oil (LP-EYO). The low-protein diets were adjusted to contain 4.13% protein and 4.7% lipids. The LP-C diet resulted in a greater increase in the liver trigriceride (TG) and the vacuolation and a greater decrease in the serum TG and free fatty acid (FFA) than did the C diet. These deviations in the serum and liver TG, serum FFA levels and the liver histopathology were corrected in rats fed the LP-EY diet but not in those fed the LP-EYO diet. Compared to rats fed the LP-C diet, although the activities of lipogenesis-related enzymes (fatty acid synthase, glucose-6-phosphate dehydrogenase, and malic enzyme) decreased in rats fed both of the LP-EY and LP-EYO diets, the level of the microsomal TG transfer protein (MTP) increased only in rats fed the LP-EY diet. Collectively, these results suggest that dietary egg yolk supplementation decreases the LP diet-induced accumulation of TG in the liver by increasing transport of TG in the liver, and egg yolk oil alone is not sufficient enough to bring about these benefits.
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Affiliation(s)
- Kazuo Erami
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University
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Hamilton JP, Koganti L, Muchenditsi A, Pendyala VS, Huso D, Hankin J, Murphy RC, Huster D, Merle U, Mangels C, Yang N, Potter JJ, Mezey E, Lutsenko S. Activation of liver X receptor/retinoid X receptor pathway ameliorates liver disease in Atp7B(-/-) (Wilson disease) mice. Hepatology 2016; 63:1828-41. [PMID: 26679751 PMCID: PMC4874878 DOI: 10.1002/hep.28406] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 10/30/2015] [Accepted: 12/15/2015] [Indexed: 01/07/2023]
Abstract
UNLABELLED Wilson disease (WD) is a hepatoneurological disorder caused by mutations in the copper-transporter, ATP7B. Copper accumulation in the liver is a hallmark of WD. Current therapy is based on copper chelation, which decreases the manifestations of liver disease, but often worsens neurological symptoms. We demonstrate that in Atp7b(-/-) mice, an animal model of WD, liver function can be significantly improved without copper chelation. Analysis of transcriptional and metabolic changes in samples from WD patients and Atp7b(-/-) mice identified dysregulation of nuclear receptors (NRs), especially the liver X receptor (LXR)/retinoid X receptor heterodimer, as an important event in WD pathogenesis. Treating Atp7b(-/-) mice with the LXR agonist, T0901317, ameliorated disease manifestations despite significant copper overload. Genetic markers of liver fibrosis and inflammatory cytokines were significantly decreased, lipid profiles normalized, and liver function and histology were improved. CONCLUSIONS The results demonstrate the major role of an altered NR function in the pathogenesis of WD and suggest that modulation of NR activity should be explored as a supplementary approach to improving liver function in WD. (Hepatology 2016;63:1828-1841).
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Affiliation(s)
- JP Hamilton
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - L Koganti
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - A Muchenditsi
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - VS Pendyala
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - D Huso
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - J Hankin
- University of Colorado, Denver, CO
| | | | - D Huster
- Deakoness Hospital, Leipzig, Germany
| | - U Merle
- University of Heidelberg, Germany
| | - C Mangels
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - N Yang
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - JJ Potter
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - E Mezey
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| | - S. Lutsenko
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD,Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
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Wu F, Wang J, Pu C, Qiao L, Jiang C. Wilson's disease: a comprehensive review of the molecular mechanisms. Int J Mol Sci 2015; 16:6419-31. [PMID: 25803104 PMCID: PMC4394540 DOI: 10.3390/ijms16036419] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 03/03/2015] [Accepted: 03/03/2015] [Indexed: 02/06/2023] Open
Abstract
Wilson’s disease (WD), also known as hepatolenticular degeneration, is an autosomal recessive inherited disorder resulting from abnormal copper metabolism. Reduced copper excretion causes an excessive deposition of the copper in many organs such as the liver, central nervous system (CNS), cornea, kidney, joints, and cardiac muscle where the physiological functions of the affected organs are impaired. The underlying molecular mechanisms for WD have been extensively studied. It is now believed that a defect in P-type adenosine triphosphatase (ATP7B), the gene encoding the copper transporting P-type ATPase, is responsible for hepatic copper accumulation. Deposited copper in the liver produces toxic effects via modulating several molecular pathways. WD can be a lethal disease if left untreated. A better understanding of the molecular mechanisms causing the aberrant copper deposition and organ damage is the key to developing effective management approaches.
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Affiliation(s)
- Fei Wu
- Department of imaging, the Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Zhongshan District, Dalian 116001, Liaoning, China.
| | - Jing Wang
- Department of Internal Medicine, the Second Hospital of Dalian Medical University, 467 Zhongshan Road, Shahekou District, Dalian 116023, Liaoning, China.
| | - Chunwen Pu
- Department of Biobank, the Sixth People's Hospital of Dalian, 269 Luganghuibai Road, Ganjingzi District, Dalian 116031, Liaoning, China.
| | - Liang Qiao
- Storr Liver Centre, Westmead Millennium Institute for Medical Research, Faculty of Medicine, the University of Sydney at Westmead Hospital, Westmead, NSW 2145, Australia.
| | - Chunmeng Jiang
- Department of Internal Medicine, the Second Hospital of Dalian Medical University, 467 Zhongshan Road, Shahekou District, Dalian 116023, Liaoning, China.
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Kuivenhoven JA, Hegele RA. Mining the genome for lipid genes. Biochim Biophys Acta Mol Basis Dis 2014; 1842:1993-2009. [PMID: 24798233 DOI: 10.1016/j.bbadis.2014.04.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/22/2014] [Accepted: 04/27/2014] [Indexed: 12/12/2022]
Abstract
Mining of the genome for lipid genes has since the early 1970s helped to shape our understanding of how triglycerides are packaged (in chylomicrons), repackaged (in very low density lipoproteins; VLDL), and hydrolyzed, and also how remnant and low-density lipoproteins (LDL) are cleared from the circulation. Gene discoveries have also provided insights into high-density lipoprotein (HDL) biogenesis and remodeling. Interestingly, at least half of these key molecular genetic studies were initiated with the benefit of prior knowledge of relevant proteins. In addition, multiple important findings originated from studies in mouse, and from other types of non-genetic approaches. Although it appears by now that the main lipid pathways have been uncovered, and that only modulators or adaptor proteins such as those encoded by LDLRAP1, APOA5, ANGPLT3/4, and PCSK9 are currently being discovered, genome wide association studies (GWAS) in particular have implicated many new loci based on statistical analyses; these may prove to have equally large impacts on lipoprotein traits as gene products that are already known. On the other hand, since 2004 - and particularly since 2010 when massively parallel sequencing has become de rigeur - no major new insights into genes governing lipid metabolism have been reported. This is probably because the etiologies of true Mendelian lipid disorders with overt clinical complications have been largely resolved. In the meantime, it has become clear that proving the importance of new candidate genes is challenging. This could be due to very low frequencies of large impact variants in the population. It must further be emphasized that functional genetic studies, while necessary, are often difficult to accomplish, making it hazardous to upgrade a variant that is simply associated to being definitively causative. Also, it is clear that applying a monogenic approach to dissect complex lipid traits that are mostly of polygenic origin is the wrong way to proceed. The hope is that large-scale data acquisition combined with sophisticated computerized analyses will help to prioritize and select the most promising candidate genes for future research. We suggest that at this point in time, investment in sequence technology driven candidate gene discovery could be recalibrated by refocusing efforts on direct functional analysis of the genes that have already been discovered. This article is part of a Special Issue entitled: From Genome to Function.
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Affiliation(s)
- Jan Albert Kuivenhoven
- University of Groningen, University Medical Center Groningen, Department of Pediatrics, Section Molecular Genetics, Antonius Deusinglaan 1, 9713GZ Groningen, The Netherlands
| | - Robert A Hegele
- Blackburn Cardiovascular Genetics Laboratory, Robarts Research Institute, 4288A-1151 Richmond Street North, London, ON N6A 5B7, Canada
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Huster D. Structural and metabolic changes in Atp7b-/- mouse liver and potential for new interventions in Wilson's disease. Ann N Y Acad Sci 2014; 1315:37-44. [PMID: 24697742 DOI: 10.1111/nyas.12337] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Wilson's disease (WD) is caused by ATP7B mutations and results in copper accumulation and toxicity in liver and brain tissues. The specific mechanisms underlying copper toxicity are still poorly understood. Mouse models have revealed new insights into pathomechanisms of hepatic WD. Mitochondrial damage is observed in livers of WD patients and in mouse models; copper induces fragmentation of mitochondrial membrane lipids, particularly cardiolipin, with deleterious effects on both mitochondrial integrity and function. Copper accumulation also induces chronic inflammation in WD livers, which is followed by regeneration in parts of the liver and occasionally neoplastic proliferation. Gene expression studies using microarrays have aided our understanding of the molecular basis of these changes. Copper overload alters cholesterol biosynthesis in hepatocytes resulting in reduced liver and serum cholesterol. Experiments are currently underway to elucidate the link between copper and cholesterol metabolism. These findings may facilitate the development of specific therapies to ameliorate WD progression.
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Affiliation(s)
- Dominik Huster
- Department of Gastroenterology and Oncology, Deaconess Hospital Leipzig, Academic Teaching Hospital University of Leipzig, Germany
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20
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Gandhi H, Pal P, Giridhar R, Yadav MR. An HPTLC method for quantification of cholesteryl esters from human plasma and rat liver microsomes. Biomed Chromatogr 2013. [DOI: 10.1002/bmc.3075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hardik Gandhi
- Pharmacy Department, Faculty of Technology and Engineering; The M. S. University of Baroda; Vadodara 390 001 Gujarat India
| | - Palash Pal
- Pharmacy Department, Faculty of Technology and Engineering; The M. S. University of Baroda; Vadodara 390 001 Gujarat India
| | - Rajani Giridhar
- Pharmacy Department, Faculty of Technology and Engineering; The M. S. University of Baroda; Vadodara 390 001 Gujarat India
| | - Mange Ram Yadav
- Pharmacy Department, Faculty of Technology and Engineering; The M. S. University of Baroda; Vadodara 390 001 Gujarat India
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Lluís L, Taltavull N, Muñoz-Cortés M, Sánchez-Martos V, Romeu M, Giralt M, Molinar-Toribio E, Torres JL, Pérez-Jiménez J, Pazos M, Méndez L, Gallardo JM, Medina I, Nogués MR. Protective effect of the omega-3 polyunsaturated fatty acids: Eicosapentaenoic acid/Docosahexaenoic acid 1:1 ratio on cardiovascular disease risk markers in rats. Lipids Health Dis 2013; 12:140. [PMID: 24083393 PMCID: PMC3850782 DOI: 10.1186/1476-511x-12-140] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 09/24/2013] [Indexed: 12/22/2022] Open
Abstract
Background High consumption of fish carries a lower risk of cardiovascular disease as a consequence of dietary omega-3 long chain polyunsaturated fatty acid (n-3 PUFA; especially EPA and DHA) content. A controversy exists about the component/s responsible of these beneficial effects and, in consequence, which is the best proportion between both fatty acids. We sought to determine, in healthy Wistar rats, the proportions of EPA and DHA that would induce beneficial effects on biomarkers of oxidative stress, and cardiovascular disease risk. Methods Female Wistar rats were fed for 13 weeks with 5 different dietary supplements of oils; 3 derived from fish (EPA/DHA ratios of 1:1, 2:1, 1:2) plus soybean and linseed as controls. The activities of major antioxidant enzymes (SOD, CAT, GPX, and GR) were determined in erythrocytes and liver, and the ORAC test was used to determine the antioxidant capacity in plasma. Also measured were: C reactive protein (CRP), endothelial dysfunction (sVCAM and sICAM), prothrombotic activity (PAI-1), lipid profile (triglycerides, cholesterol, HDLc, LDLc, Apo-A1, and Apo-B100), glycated haemoglobin and lipid peroxidation (LDL-ox and MDA values). Results After three months of nutritional intervention, we observed statistically significant differences in the ApoB100/ApoA1 ratio, glycated haemoglobin, VCAM-1, SOD and GPx in erythrocytes, ORAC values and LDL-ox. Supplementation with fish oil derived omega-3 PUFA increased VCAM-1, LDL-ox and plasma antioxidant capacity (ORAC). Conversely, the ApoB100/ApoA1 ratio and percentage glycated haemoglobin decreased. Conclusions Our results showed that a diet of a 1:1 ratio of EPA/DHA improved many of the oxidative stress parameters (SOD and GPx in erythrocytes), plasma antioxidant capacity (ORAC) and cardiovascular risk factors (glycated haemoglobin) relative to the other diets.
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Affiliation(s)
- Laura Lluís
- Unit of Pharmacology, Faculty of Medicine and Health Sciences, Rovira i Virgili University, Sant Llorenç, 21, 43201 Reus, Spain.
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Affiliation(s)
- Valentina Medici
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of California Davis, Sacramento, California
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Severe dysfunction of respiratory chain and cholesterol metabolism in Atp7b(-/-) mice as a model for Wilson disease. Biochim Biophys Acta Mol Basis Dis 2011; 1812:1607-15. [PMID: 21920437 DOI: 10.1016/j.bbadis.2011.08.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 08/26/2011] [Accepted: 08/29/2011] [Indexed: 12/18/2022]
Abstract
Wilson disease (WD) is caused by mutations of the WD gene ATP7B resulting in copper accumulation in different tissues. WD patients display hepatic and neurological disease with yet poorly understood pathomechanisms. Therefore, we studied age-dependent (3, 6, 47weeks) biochemical and bioenergetical changes in Atp7b(-/-) mice focusing on liver and brain. Mutant mice showed strongly elevated copper and iron levels. Age-dependently decreasing hepatic reduced glutathione levels along with increasing oxidized to reduced glutathione ratios in liver and brain of 47weeks old mice as well as elevated hepatic and cerebral superoxide dismutase activities in 3weeks old mutant mice highlighted oxidative stress in the investigated tissues. We could not find evidence that amino acid metabolism or beta-oxidation is impaired by deficiency of ATP7B. In contrast, sterol metabolism was severely dysregulated. In brains of 3week old mice cholesterol, 8-dehydrocholesterol, desmosterol, 7-dehydrocholesterol, and lathosterol were all highly increased. These changes reversed age-dependently resulting in reduced levels of all previously increased sterol metabolites in 47weeks old mice. A similar pattern of sterol metabolite changes was found in hepatic tissue, though less pronounced. Moreover, mitochondrial energy production was severely affected. Respiratory chain complex I activity was increased in liver and brain of mutant mice, whereas complex II, III, and IV activities were reduced. In addition, aconitase activity was diminished in brains of Atp7b(-/-) mice. Summarizing, our study reveals oxidative stress along with severe dysfunction of mitochondrial energy production and of sterol metabolism in Atp7b(-/-) mice shedding new light on the pathogenesis of WD.
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Burkhead JL, Gray LW, Lutsenko S. Systems biology approach to Wilson's disease. Biometals 2011; 24:455-66. [PMID: 21380607 PMCID: PMC3106420 DOI: 10.1007/s10534-011-9430-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 02/19/2011] [Indexed: 12/12/2022]
Abstract
Wilson's disease (WD) is a severe disorder of copper misbalance, which manifests with a wide spectrum of liver pathology and/or neurologic and psychiatric symptoms. WD is caused by mutations in a gene encoding a copper-transporting ATPase ATP7B and is accompanied by accumulation of copper in tissues, especially in the liver. Copper-chelation therapy is available for treatment of WD symptoms and is often successful, however, significant challenges remain with respect to timely diagnostics and treatment of the disease. The lack of genotype-phenotype correlation remains unexplained, the causes of fulminant liver failure are not known, and the treatment of neurologic symptoms is only partially successful, underscoring the need for better understanding of WD mechanisms and factors that influence disease manifestations. Recent gene and protein profiling studies in animal models of WD began to uncover cellular processes that are primarily affected by copper accumulation in the liver. The results of such studies, summarized in this review, revealed new molecular players and pathways (cell cycle and cholesterol metabolism, mRNA splicing and nuclear receptor signaling) linked to copper misbalance. A systems biology approach promises to generate a comprehensive view of WD onset and progression, thus helping with a more fine-tune treatment and monitoring of the disorder.
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Seessle J, Gohdes A, Gotthardt DN, Pfeiffenberger J, Eckert N, Stremmel W, Reuner U, Weiss KH. Alterations of lipid metabolism in Wilson disease. Lipids Health Dis 2011; 10:83. [PMID: 21595966 PMCID: PMC3127787 DOI: 10.1186/1476-511x-10-83] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 05/19/2011] [Indexed: 01/08/2023] Open
Abstract
INTRODUCTION Wilson disease (WD) is an inherited disorder of human copper metabolism, characterised by accumulation of copper predominantly in the liver and brain, leading to severe hepatic and neurological disease. Interesting findings in animal models of WD (Atp7b-/- and LEC rats) showed altered lipid metabolism with a decrease in the amount of triglycerides and cholesterol in the serum. However, serum lipid profile has not been investigated in large human WD patient cohorts to date. PATIENTS AND METHODS This cohort study involved 251 patients examined at the Heidelberg and Dresden (Germany) University Hospitals. Patients were analysed on routine follow-up examinations for serum lipid profile, including triglycerides, cholesterol, high density lipoprotein (HDL) and low density lipoprotein (LDL). Data on these parameters at time of diagnosis were retrieved by chart review where available. For statistical testing, patients were subgrouped by sex, manifestation (hepatic, neurological, mixed and asymptomatic) and treatment (D-penicillamine, trientine, zinc or combination). RESULTS A significant difference in total serum cholesterol was found in patients with hepatic symptoms, which diminished under therapy. No alterations were observed for HDL, LDL and triglycerides. CONCLUSION Contradictory to previous reports using WD animal models (Atp7b-/- and LEC rats), the most obvious alteration in our cohort was a lower serum cholesterol level in hepatic-affected patients, which might be related to liver injury. Our data suggested unimpaired cholesterol metabolism in Wilson disease under therapy, independent of the applied medical treatment.
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Affiliation(s)
- Jessica Seessle
- Department of Gastroenterology, University Hospital Heidelberg, Heidelberg, Germany
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Taha R, Seidman E, Mailhot G, Boudreau F, Gendron FP, Beaulieu JF, Ménard D, Delvin E, Amre D, Levy E. Oxidative stress and mitochondrial functions in the intestinal Caco-2/15 cell line. PLoS One 2010; 5:e11817. [PMID: 20676402 PMCID: PMC2910735 DOI: 10.1371/journal.pone.0011817] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 07/02/2010] [Indexed: 12/15/2022] Open
Abstract
Background Although mitochondrial dysfunction and oxidative stress are central mechanisms in various pathological conditions, they have not been extensively studied in the gastrointestinal tract, which is known to be constantly exposed to luminal oxidants from ingested foods. Key among these is the simultaneous consumption of iron salts and ascorbic acid, which can cause oxidative damage to biomolecules. Methodology/Principal Findings The objective of the present work was to evaluate how iron-ascorbate (FE/ASC)-mediated lipid peroxidation affects mitochondrion functioning in Caco-2/15 cells. Our results show that treatment of Caco-2/15 cells with FE/ASC (0.2 mM/2 mM) (1) increased malondialdehyde levels assessed by HPLC; (2) reduced ATP production noted by luminescence assay; (3) provoked dysregulation of mitochondrial calcium homeostasis as evidenced by confocal fluorescence microscopy; (4) upregulated the protein expression of cytochrome C and apoptotic inducing factor, indicating exaggerated apoptosis; (5) affected mitochondrial respiratory chain complexes I, II, III and IV; (6) elicited mtDNA lesions as illustrated by the raised levels of 8-OHdG; (7) lowered DNA glycosylase, one of the first lines of defense against 8-OHdG mutagenicity; and (8) altered the gene expression and protein mass of mitochondrial transcription factors (mtTFA, mtTFB1, mtTFB2) without any effects on RNA Polymerase. The presence of the powerful antioxidant BHT (50 µM) prevented the occurrence of oxidative stress and most of the mitochondrial abnormalities. Conclusions/Significance Collectively, our findings indicate that acute exposure of Caco-2/15 cells to FE/ASC-catalyzed peroxidation produces harmful effects on mitochondrial functions and DNA integrity, which are abrogated by the powerful exogenous BHT antioxidant. Functional derangements of mitochondria may have implications in oxidative stress-related disorders such as inflammatory bowel diseases.
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Affiliation(s)
- Rame Taha
- Department of Nutrition, Research Center, CHU-Sainte-Justine, Université de Montréal, Montreal, Canada
| | - Ernest Seidman
- Research Institute, McGill University, Montreal, Canada
- Canadian Institutes for Health Research Team on the Digestive Epithelium, Department of Anatomy and Cellular Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Genevieve Mailhot
- Department of Nutrition, Research Center, CHU-Sainte-Justine, Université de Montréal, Montreal, Canada
| | - François Boudreau
- Canadian Institutes for Health Research Team on the Digestive Epithelium, Department of Anatomy and Cellular Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Fernand-Pierre Gendron
- Canadian Institutes for Health Research Team on the Digestive Epithelium, Department of Anatomy and Cellular Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Jean-François Beaulieu
- Canadian Institutes for Health Research Team on the Digestive Epithelium, Department of Anatomy and Cellular Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Daniel Ménard
- Canadian Institutes for Health Research Team on the Digestive Epithelium, Department of Anatomy and Cellular Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Edgard Delvin
- Department of Biochemistry, Research Center, CHU-Sainte-Justine, Université de Montréal, Montreal, Canada
| | - Devendra Amre
- Department of Pediatrics, Research Center, CHU-Sainte-Justine, Université de Montréal, Montreal, Canada
| | - Emile Levy
- Department of Nutrition, Research Center, CHU-Sainte-Justine, Université de Montréal, Montreal, Canada
- Canadian Institutes for Health Research Team on the Digestive Epithelium, Department of Anatomy and Cellular Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
- * E-mail:
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Maladie de Wilson et tumeur hépatique maligne. Rev Med Interne 2010; 31:e7-9. [DOI: 10.1016/j.revmed.2009.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Revised: 04/24/2009] [Accepted: 05/23/2009] [Indexed: 11/18/2022]
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Hanada S, Snider NT, Brunt EM, Hollenberg PF, Omary MB. Gender dimorphic formation of mouse Mallory-Denk bodies and the role of xenobiotic metabolism and oxidative stress. Gastroenterology 2010; 138:1607-17. [PMID: 20064513 PMCID: PMC2847059 DOI: 10.1053/j.gastro.2009.12.055] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 12/14/2009] [Accepted: 12/28/2009] [Indexed: 12/20/2022]
Abstract
BACKGROUND & AIMS Mallory-Denk bodies (MDBs) are keratin (K)-rich cytoplasmic hepatocyte inclusions commonly associated with alcoholic steatohepatitis. Given the significant gender differences in predisposition to human alcohol-related liver injury, and the strain difference in mouse MDB formation, we hypothesized that sex affects MDB formation. METHODS MDBs were induced in male and female mice overexpressing K8, which are predisposed to MDB formation, and in nontransgenic mice by feeding the porphyrinogenic compound 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC). MDB presence was determined by histologic, immunofluorescence, and biochemical analyses and correlated to liver injury using serologic and pathologic markers. Cytoskeletal and metabolic liver protein analysis, in vitro metabolism studies, and measurement of oxidative stress markers and protoporphyrin-IX were performed. RESULTS Male mice formed significantly more MDBs, which was attenuated modestly by estradiol. MDB formation was accompanied by increased oxidative stress. Female mice had significantly fewer MDBs and oxidative stress-related changes, but had increased ductular reaction protoporphyrin-IX accumulation, and MDB-preventive K18 induction. Evaluation of the microsomal cytochrome-P450 (CYP) enzymes revealed significant gender differences in protein expression and activity in untreated and DDC-fed mice, and showed that DDC is metabolized by CYP3A. The changes in CYPs account for the gender differences in porphyria and DDC metabolism. DDC metabolite formation and oxidative injury accumulate on chronic DDC exposure in males, despite more efficient acute metabolism in females. CONCLUSIONS Gender dimorphic formation of MDBs and porphyria associate with differences in CYPs, oxidative injury, and selective keratin induction. These findings may extend to human MDBs and other neuropathy- and myopathy-related inclusions.
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Affiliation(s)
- Shinichiro Hanada
- Departments of Molecular & Integrative Physiology, Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48109–5622, Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume 830–0011, Japan
| | - Natasha T. Snider
- Departments of Molecular & Integrative Physiology, Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48109–5622,To whom correspondence should be addressed: Natasha Snider, University of Michigan School of Medicine, Department of Molecular & Integrative Physiology, 7720 Medical Science II, 1301 E. Catherine Street, Ann Arbor, MI 48109-5622, (734) 647-6461 Phone; (734) 936-8813 Fax,
| | - Elizabeth M. Brunt
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO
| | - Paul F. Hollenberg
- Department of Pharmacology, University of Michigan School of Medicine, Ann Arbor, MI 48109–5622
| | - M. Bishr Omary
- Departments of Molecular & Integrative Physiology, Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48109–5622
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Joseph B, Kapoor S, Schilsky ML, Gupta S. Bile salt-induced pro-oxidant liver damage promotes transplanted cell proliferation for correcting Wilson disease in the Long-Evans Cinnamon rat model. Hepatology 2009; 49:1616-24. [PMID: 19185006 PMCID: PMC2677114 DOI: 10.1002/hep.22792] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Insights into disease-specific mechanisms for liver repopulation are needed for cell therapy. To understand the efficacy of pro-oxidant hepatic perturbations in Wilson disease, we studied Long-Evans Cinnamon (LEC) rats with copper toxicosis under several conditions. Hepatocytes from healthy Long-Evans Agouti (LEA) rats were transplanted intrasplenically into the liver. A cure was defined as lowering of copper to below 250 microg/g liver, presence of ATPase, Cu++ transporting, beta polypeptide (atp7b) messenger RNA (mRNA) in the liver and improvement in liver histology. Treatment of animals with the hydrophobic bile salt, cholic acid, or liver radiation before cell transplantation produced cure rates of 14% and 33%, respectively; whereas liver radiation plus partial hepatectomy followed by cell transplantation proved more effective, with cure in 55%, P < 0.01; and liver radiation plus cholic acid followed by cell transplantation was most effective, with cure in 75%, P < 0.001. As a group, cell therapy cures in rats preconditioned with liver radiation plus cholic acid resulted in less hepatic copper, indicating greater extent of liver repopulation. We observed increased hepatic catalase and superoxide dismutase activities in LEC rats, suggesting chronic oxidative stress. After liver radiation or cholic acid, hepatic lipid peroxidation levels increased, indicating further oxidative injury, although we did not observe overt additional cytotoxicity. This contrasted with healthy animals in which liver radiation and cholic acid produced hepatic steatosis and loss of injured hepatocytes. We concluded that pro-oxidant perturbations were uniquely effective for cell therapy in Wilson disease because of the nature of preexisting hepatic damage.
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Affiliation(s)
- Brigid Joseph
- Marion Bessin Liver Research Center, Diabetes Research Center, Cancer Research Center, Departments of Medicine and Pathology, and Institute for Clinical and Translational Research, Albert Einstein College of Medicine, Bronx, New York
| | - Sorabh Kapoor
- Marion Bessin Liver Research Center, Diabetes Research Center, Cancer Research Center, Departments of Medicine and Pathology, and Institute for Clinical and Translational Research, Albert Einstein College of Medicine, Bronx, New York
| | - Michael L. Schilsky
- The Yale-New Haven Transplantation Center, Yale-New Haven Hospital, New Haven, Connecticut
| | - Sanjeev Gupta
- Marion Bessin Liver Research Center, Diabetes Research Center, Cancer Research Center, Departments of Medicine and Pathology, and Institute for Clinical and Translational Research, Albert Einstein College of Medicine, Bronx, New York
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MATSUI K, OHTA T, MORINAGA H, SASASE T, FUKUDA S, ITO M, UEDA M, OGAWA N, MIYAJIMA K, MATSUSHITA M. Effects of preventing hyperphagia on glycolipid metabolic abnormalities in Spontaneously Diabetic Torii fatty rats. Anim Sci J 2008. [DOI: 10.1111/j.1740-0929.2008.00570.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Huster D, Lutsenko S. Wilson disease: not just a copper disorder. Analysis of a Wilson disease model demonstrates the link between copper and lipid metabolism. MOLECULAR BIOSYSTEMS 2007; 3:816-24. [DOI: 10.1039/b711118p] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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