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Yang H, Kabin E, Dong Y, Zhang X, Ralle M, Lutsenko S. ATP7A-dependent copper sequestration contributes to termination of β-CATENIN signaling during early adipogenesis. Mol Metab 2024; 80:101872. [PMID: 38185452 PMCID: PMC10827583 DOI: 10.1016/j.molmet.2024.101872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 01/03/2024] [Indexed: 01/09/2024] Open
Abstract
OBJECTIVES Adipocyte fate determination is tightly regulated by extrinsic signaling pathways and intrinsic metabolic and morphologic changes that maintain adipose tissue function. Copper (Cu) homeostasis is required for the normal metabolism of mature adipocytes, whereas the role of Cu in adipogenesis is unclear. METHODS To determine the role of Cu is adipocytes differentiation, we used 3T3-L1 adipocytes, immunocytochemistry, X-ray fluorescence, mass-spectrometry, pharmacological treatments, and manipulations of copper levels. RESULTS In differentiating 3T3-L1 cells, adipogenic stimuli trigger the upregulation and trafficking of the Cu transporter Atp7a, thus causing Cu redistribution from the cytosol to vesicles. Disrupting Cu homeostasis by the deletion of Atp7a results in Cu elevation and inhibition of adipogenesis. The upregulation of C/EBPβ, an initial step of adipogenesis, is not affected in Atp7a-/- cells, whereas the subsequent upregulation of PPARγ is inhibited. Comparison of changes in the Atp7a-/- and wild type cells proteomes during early adipogenesis revealed stabilization of β-catenin, a negative regulator of adipogenesis. Cu chelation, or overexpression of the Cu transporter ATP7B in Atp7a-/- cells, restored β-catenin down-regulation and intracellular targeting. CONCLUSIONS Cu buffering during early adipogenesis contributes to termination of β-catenin signaling. Abnormal upregulation of β-catenin was also observed in vivo in the livers of Atp7b-/- mice, which accumulate Cu, suggesting a tissue-independent crosstalk between Cu homeostasis and the Wnt/β-catenin pathway. These results point to a new regulatory role of Cu in adipocytes and contribute to better understanding of human disorders of Cu misbalance.
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Affiliation(s)
- H Yang
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.
| | - E Kabin
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia; Department of Physiology, Johns Hopkins Medical Institutes, Baltimore, MD, USA
| | - Y Dong
- Department of Physiology, Johns Hopkins Medical Institutes, Baltimore, MD, USA
| | - X Zhang
- Department of Physiology, Johns Hopkins Medical Institutes, Baltimore, MD, USA
| | - M Ralle
- Department of Molecular Genetics, OHSU, Portland OR, USA
| | - S Lutsenko
- Department of Physiology, Johns Hopkins Medical Institutes, Baltimore, MD, USA.
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Liu Y, Wei Y, Dou Y, Li C, Song C, Zhang Z, Qi K, Li X, Qiao R, Wang K, Li X, Yang F, Han X. Effect of miR-149-5p on intramuscular fat deposition in pigs based on metabolomics and transcriptomics. BMC Genomics 2023; 24:293. [PMID: 37259030 DOI: 10.1186/s12864-023-09382-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 05/15/2023] [Indexed: 06/02/2023] Open
Abstract
As one of the important traits in pig production, meat quality has important research significance and value. Intramuscular fat (IMF) content is one of the most important factors affecting pork quality. Many experimental studies have shown that IMF content is closely related to the flavor, tenderness, and juiciness of pork. Therefore, it is of great significance to study the mechanism of porcine IMF deposition. Previous research indicated that miR-149-5p promoted the proliferation of porcine intramuscular (IM) preadipocytes and decreased their ability to differentiate, albeit the exact mechanism of action is unknown. In vitro, foreign pigs showed increased miR-149-5p expression and reduced fat deposition when compared to Queshan Black pigs. This study conducted metabolomics and transcriptomics analyses of porcine IM preadipocytes overexpressing miR-149-5p to verify their effects on lipid formation. According to metabolomics analysis, the overexpression of miR-149-5p has significantly altered the lipid, organic acid, and organic oxygen metabolites of porcine IM preadipocytes. Specially speaking, it has changed 115 metabolites, including 105 up-regulated and 10 down-regulated ones, as well as the composition of lipid, organic acid, and organic oxygen metabolism-related metabolites. RNA-seq analysis showed that overexpression of miR-149-5p significantly altered 857 genes, of which 442 were up-regulated, and 415 were down-regulated, with enrichment to MAPK, IL-17, PI3K-Akt, and ErbB signaling pathways. We found that overexpression of miR-149-5p inhibited adipogenic differentiation by changing cAMP signaling pathway in porcine IM preadipocytes. In addition, the overexpression of miR-149-5p may affect the transport of Cu2+ by targeting ATP7A and inhibiting adipogenic differentiation. These findings elucidate the regulatory function of miR-149-5p in porcine IM preadipocytes, which may be a key target for controlling pork quality.
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Affiliation(s)
- Yingke Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Yilin Wei
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Yaqing Dou
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Chenlei Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Chenglei Song
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Zhe Zhang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Kunlong Qi
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Xinjian Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Ruimin Qiao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Kejun Wang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Xiuling Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Feng Yang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China
| | - Xuelei Han
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China.
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Pan J, Chui L, Liu T, Zheng Q, Liu X, Liu L, Zhao Y, Zhang L, Song M, Han J, Huang J, Tang C, Tao C, Zhao J, Wang Y. Fecal Microbiota Was Reshaped in UCP1 Knock-In Pigs via the Adipose-Liver-Gut Axis and Contributed to Less Fat Deposition. Microbiol Spectr 2023; 11:e0354022. [PMID: 36688695 PMCID: PMC9927592 DOI: 10.1128/spectrum.03540-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 12/21/2022] [Indexed: 01/24/2023] Open
Abstract
The relationship between the host gut microbiota and obesity has been well documented in humans and mice; however, few studies reported the association between the gut microbiota and fat deposition in pigs. In a previous study, we generated uncoupling protein 1 (UCP1) knock-in pigs (UCP1 pigs), which exhibited a lower fat deposition phenotype. Whether the gut microbiota was reshaped in these pigs and whether the reshaped gut microbiota contributes to the lower fat content remain unknown. Here, we revealed that the fecal microbiota composition and metabolites were significantly altered under both chow diet (CD) and high-fat/high-cholesterol (HFHC) diet conditions in UCP1 pigs compared to those in wild-type (WT) pigs. The abundance of Oscillospira and Coprococcus and the level of metabolite hyodeoxycholic acid (HDCA) from feces were observed to be significantly increased in UCP1 pigs. An association analysis revealed that Oscillospira and Coprococcus were significantly negatively related to backfat thickness. In addition, after fecal microbiota transplantation (FMT), the mice that were orally gavaged with feces from UCP1 pigs exhibited less fat deposition under both CD and high-fat diet (HFD) conditions, suggesting that the fecal microbes of UCP1 pigs participate in regulating host lipid metabolism. Consistently, HDCA-treated mice also exhibited reduced fat content. Mechanistically, we found that UCP1 expression in white adipose tissue alters the gut microbiota via the adipose-liver-gut axis in pigs. Our study provides new data concerning the cross talk between host genetic variations and the gut microbiota and paves the way for the potential application of microbes or their metabolites in the regulation of fat deposition in pigs. IMPORTANCE This article investigated the effect of the ectopic expression of UCP1 on the regulation of fecal microbiota composition and metabolites and which alters the fat deposition phenotype. Bacteria, including Oscillospira and Coprococcus, and the metabolite HDCA were found to be significantly increased in feces of UCP1 pigs and had a negative relationship with backfat thickness. Mice with fecal microbiota transplantation phenocopied the UCP1 pigs under both CD and HFD conditions, suggesting that the fecal microbes of UCP1 pigs participate in regulating host lipid metabolism. Our study provides new data regarding the cross talk between host genetic variations and the gut microbiota and paves the way for the potential application of microbes or their metabolic production in the regulation of fat deposition in pigs.
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Affiliation(s)
- Jianfei Pan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Linya Chui
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, People’s Republic of China
| | - Tianxia Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Qiantao Zheng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Xuexue Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Lulu Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Ying Zhao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Lilan Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Min Song
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
- CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Jianlin Han
- CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Livestock Genetics Program, International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Jiaojiao Huang
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, People’s Republic of China
| | - Chaohua Tang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Cong Tao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural 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
| | - Yanfang Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
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Li C, Wu Y, Li H, Wang H, Liu JX. Lipid-related metabolism during zebrafish embryogenesis under unbalanced copper homeostasis. FISH PHYSIOLOGY AND BIOCHEMISTRY 2022; 48:1571-1586. [PMID: 36161547 DOI: 10.1007/s10695-022-01127-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 09/17/2022] [Indexed: 05/13/2023]
Abstract
Copper (Cu) is an essential trace element, playing an important role in lipid metabolism, and its transporters ATP7A and ATP7B, as Cu-transporting P-type ATPases, are involved in maintaining the Cu homeostasis in cells. Numerous studies in mammals have shown that Cu homeostasis and lipid metabolism are closely related, but studies on the link between the effects of excess Cu, ATP7A, and ATP7B on lipid metabolism during vertebrate embryogenesis are scarce. In this study, zebrafish disease models with Cu overload and ATP7A and ATP7B inactivation, respectively, were used to study the lipid metabolism-related differentially expressed genes (DEGs) which were enriched in the models. The dynamic and spatiotemporal expressions of the DEGs in WTs, atp7a-/-, and atp7b-/- mutants with or without Cu stress were unveiled in this study and they mostly distributed in brain at 24 hpf then in liver and intestine at 96 hpf, suggesting their potential roles in lipid and glycogen metabolism to apply energy for normal development in zebrafish. Meanwhile, the correlation analysis for the DEGs among the three groups unveiled that most of the DEGs were involved in the glyceride metabolism pathway. This is the first report to establish the relationship between atp7a and atp7b with Cu-stimulated intestinal and liver lipid metabolism during fish embryogenesis, and this study will provide a theoretical basis for fish embryonic development and lipid metabolism disorders under unbalanced copper homeostasis.
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Affiliation(s)
- ChangShun Li
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China
| | - You Wu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China
| | - HaoTian Li
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hai Wang
- Wuhan Zhihuiyuan Environmental Protection Technology, Co., Ltd, Wuhan, 430070, China
| | - Jing-Xia Liu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, China.
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Abeyrathna N, Abeyrathna S, Morgan MT, Fahrni CJ, Meloni G. Transmembrane Cu(I) P-type ATPase pumps are electrogenic uniporters. Dalton Trans 2021; 49:16082-16094. [PMID: 32469032 DOI: 10.1039/d0dt01380c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cu(i) P-type ATPases are transmembrane primary active ion pumps that catalyze the extrusion of copper ions across cellular membranes. Their activity is critical in controlling copper levels in all kingdoms of life. Biochemical and structural characterization established the structural framework by which Cu-pumps perform their function. However, the details of the overall mechanism of transport (uniporter vs. cotransporter) and electrogenicity still remain elusive. In this work, we developed a platform to reconstitute the model Cu(i)-pump from E. coli (EcCopA) in artificial lipid bilayer small unilamellar vesicles (SUVs) to quantitatively characterize the metal substrate, putative counter-ions and charge translocation. By encapsulating in the liposome lumen fluorescence detector probes (CTAP-3, pyranine and oxonol VI) responsive to diverse stimuli (Cu(i), pH and membrane potential), we correlated substrate, secondary-ion translocation and charge movement events in EcCopA proteoliposomes. This platform centered on multiple fluorescence reporters allowed study of the mechanism and translocation kinetic parameters in real-time for wild-type EcCopA and inactive mutants. The maximal initial Cu(i) transport rate of 165 nmol Cu(i) mg-1 min-1 and KM, Cu(I) = 0.15 ± 0.07 μM was determined with this analysis. We reveal that Cu(i) pumps are primary-active uniporters and electrogenic. The Cu(i) translocation cycle does not require proton counter-transport resulting in electrogenic generation of transmembrane potential upon translocation of one Cu(i) per ATP hydrolysis cycle. Thus, mechanistic differences between Cu(i) pumps and other better characterized P-type ATPases are discussed. The platform opens the venue to study translocation events and mechanisms of transport in other transition metal P-type ATPase pumps.
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Affiliation(s)
- Nisansala Abeyrathna
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX 75080, USA.
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6
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Copper and lipid metabolism: A reciprocal relationship. Biochim Biophys Acta Gen Subj 2021; 1865:129979. [PMID: 34364973 DOI: 10.1016/j.bbagen.2021.129979] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/02/2021] [Accepted: 08/02/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND Copper and lipid metabolism are intimately linked, sharing a complex, inverse relationship in the periphery (outside of the central nervous system), which remains to be fully elucidated. SCOPE Copper and lipids have independently been implicated in the pathogenesis of diseases involving dyslipidaemia, including obesity, cardiovascular disease and non-alcoholic fatty liver disease and also in Wilson disease, an inherited disorder of copper overload. Here we review the relationship between copper and lipid regulatory pathways, which are potential druggable targets for therapeutic intervention. MAJOR CONCLUSIONS While the inverse relationship between copper and lipids is apparent, tissue-specific roles for the copper regulatory protein, ATP7B provide further insight into the association between copper and lipid metabolism. GENERAL SIGNIFICANCE Understanding the relationship between copper and lipid metabolism is important for identifying druggable targets for diseases with disrupted copper and/or lipid metabolism; and may reveal similar connections within the brain and in neurological diseases with impaired copper and lipid transport.
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7
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Sarode GV, Neier K, Shibata NM, Shen Y, Goncharov DA, Goncharova EA, Mazi TA, Joshi N, Settles ML, LaSalle JM, Medici V. Wilson Disease: Intersecting DNA Methylation and Histone Acetylation Regulation of Gene Expression in a Mouse Model of Hepatic Copper Accumulation. Cell Mol Gastroenterol Hepatol 2021; 12:1457-1477. [PMID: 34098115 PMCID: PMC8487080 DOI: 10.1016/j.jcmgh.2021.05.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/25/2021] [Accepted: 05/26/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS The pathogenesis of Wilson disease (WD) involves hepatic and brain copper accumulation resulting from pathogenic variants affecting the ATP7B gene and downstream epigenetic and metabolic mechanisms. Prior methylome investigations in human WD liver and blood and in the Jackson Laboratory (Bar Harbor, ME) C3He-Atp7btx-j/J (tx-j) WD mouse model revealed an epigenetic signature of WD, including changes in histone deacetylase (HDAC) 5. We tested the hypothesis that histone acetylation is altered with respect to copper overload and aberrant DNA methylation in WD. METHODS We investigated class IIa HDAC4 and HDAC5 and H3K9/H3K27 histone acetylation in tx-j mouse livers compared with C3HeB/FeJ (C3H) control in response to 3 treatments: 60% kcal fat diet, D-penicillamine (copper chelator), and choline (methyl group donor). Experiments with copper-loaded hepatoma G2 cells were conducted to validate in vivo studies. RESULTS In 9-week tx-j mice, HDAC5 levels increased significantly after 8 days of a 60% kcal fat diet compared with chow. In 24-week tx-j mice, HDAC4/5 levels were reduced 5- to 10-fold compared with C3H, likely through mechanisms involving HDAC phosphorylation. HDAC4/5 levels were affected by disease progression and accompanied by increased acetylation. D-penicillamine and choline partially restored HDAC4/5 and H3K9ac/H3K27ac to C3H levels. Integrated RNA and chromatin immunoprecipitation sequencing analyses revealed genes regulating energy metabolism and cellular stress/development, which, in turn, were regulated by histone acetylation in tx-j mice compared with C3H mice, with Pparα and Pparγ among the most relevant targets. CONCLUSIONS These results suggest dietary modulation of class IIa HDAC4/5, and subsequent H3K9/H3K27 acetylation/deacetylation can regulate gene expression in key metabolic pathways in the pathogenesis of WD.
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Affiliation(s)
| | - Kari Neier
- Department of Medical Microbiology and Immunology, Genome Center, Davis, California
| | | | - Yuanjun Shen
- Division of Pulmonary, Critical Care and Sleep Medicine, Lung Center, Department of Internal Medicine, Davis, California
| | - Dmitry A. Goncharov
- Division of Pulmonary, Critical Care and Sleep Medicine, Lung Center, Department of Internal Medicine, Davis, California
| | - Elena A. Goncharova
- Division of Pulmonary, Critical Care and Sleep Medicine, Lung Center, Department of Internal Medicine, Davis, California
| | - Tagreed A. Mazi
- Department of Nutrition, Davis, California,Department of Community Health Sciences–Clinical Nutrition, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Nikhil Joshi
- Bioinformatics Core Facility, University of California–Davis, Davis, California
| | - Matthew L. Settles
- Bioinformatics Core Facility, University of California–Davis, Davis, California
| | - Janine M. LaSalle
- Department of Medical Microbiology and Immunology, Genome Center, Davis, California
| | - Valentina Medici
- Division of Gastroenterology and Hepatology, Davis, California,Correspondence Address correspondence to: Valentina Medici, MD, FAASLD, Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of California–Davis, 4150 V Street, Patient Support Services Building (PSSB) Suite 3500, Sacramento, California 95817. fax: (916) 734-7908.
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Liang X, Tao C, Pan J, Zhang L, Liu L, Zhao Y, Fan Y, Cao C, Liu J, Zhang J, Lam SM, Shui G, Jin W, Li W, Zhao J, Li K, Wang Y. Rnf20 deficiency in adipocyte impairs adipose tissue development and thermogenesis. Protein Cell 2020; 12:475-492. [PMID: 32797353 PMCID: PMC8160045 DOI: 10.1007/s13238-020-00770-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 07/05/2020] [Indexed: 12/14/2022] Open
Abstract
RNF20, an E3 ligase critical for monoubiquitination of histone H2B at lysine 120 (H2Bub), has been implicated in the regulation of various cellar processes; however, its physiological roles in adipocytes remain poorly characterized. Here, we report that the adipocyte-specific knockout of Rnf20 (ASKO) in mice led to progressive fat loss, organomegaly and hyperinsulinemia. Despite signs of hyperinsulinemia, normal insulin sensitivity and improved glucose tolerance were observed in the young and aged CD-fed ASKO mice. In addition, high-fat diet-fed ASKO mice developed severe liver steatosis. Moreover, we observed that the ASKO mice were extremely sensitive to a cold environment due to decreased expression levels of brown adipose tissue (BAT) selective genes, including uncoupling protein 1 (Ucp1), and impaired mitochondrial functions. Significantly decreased levels of peroxisome proliferator-activated receptor gamma (Pparγ) were observed in the gonadal white adipose tissues (gWAT) from the ASKO mice, suggesting that Rnf20 regulates adipogenesis, at least in part, through Pparγ. Rosiglitazone-treated ASKO mice exhibited increased fat mass compared to that of the non-treated ASKO mice. Collectively, our results illustrate the critical role of RNF20 in control of white and brown adipose tissue development and physiological function.
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Affiliation(s)
- Xiaojuan Liang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Cong Tao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Jianfei Pan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Lilan Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Lulu Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
- Department of Animal Science, China Agricultural University, Beijing, 100193, China
| | - Ying Zhao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Yiping Fan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Chunwei Cao
- Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jiali Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Jin Zhang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, 314001, China
| | - Sin Man Lam
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Guanghou Shui
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Wanzhu Jin
- Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei Li
- Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianguo Zhao
- Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Kui Li
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
| | - Yanfang Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China.
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9
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Lin W, Xu L, Li G. Molecular Insights Into Lysyl Oxidases in Cartilage Regeneration and Rejuvenation. Front Bioeng Biotechnol 2020; 8:359. [PMID: 32426343 PMCID: PMC7204390 DOI: 10.3389/fbioe.2020.00359] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 03/31/2020] [Indexed: 12/13/2022] Open
Abstract
Articular cartilage remains among the most difficult tissues to regenerate due to its poor self-repair capacity. The lysyl oxidase family (LOX; also termed as protein-lysine 6-oxidase), mainly consists of lysyl oxidase (LO) and lysyl oxidase-like 1-4 (LOXL1-LOXL4), has been traditionally defined as cuproenzymes that are essential for stabilization of extracellular matrix, particularly cross-linking of collagen and elastin. LOX is essential in the musculoskeletal system, particularly cartilage. LOXs-mediated collagen cross-links are essential for the functional integrity of articular cartilage. Appropriate modulation of the expression or activity of certain LOX members selectively may become potential promising strategy for cartilage repair. In the current review, we summarized the advances of LOX in cartilage homeostasis and functioning, as well as copper-mediated activation of LOX through hypoxia-responsive signaling axis during recent decades. Also, the molecular signaling network governing LOX expression has been summarized, indicating that appropriate modulation of hypoxia-responsive-signaling-directed LOX expression through manipulation of bioavailability of copper and oxygen is promising for further clinical implications of cartilage regeneration, which has emerged as a potential therapeutic approach for cartilage rejuvenation in tissue engineering and regenerative medicine. Therefore, targeted regulation of copper-mediated hypoxia-responsive signalling axis for selective modulation of LOX expression may become potential effective therapeutics for enhanced cartilage regeneration and rejuvenation in future clinical implications.
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Affiliation(s)
- Weiping Lin
- Department of Orthopaedics and Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - Liangliang Xu
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Lingnan Medical Research Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Gang Li
- Department of Orthopaedics and Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China.,MOE Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China
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10
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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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Zhou L, Tang J, Yang X, Dong H, Xiong X, Huang J, Zhang L, Qin H, Yan S. Five Constituents in Psoralea corylifolia L. Attenuate Palmitic Acid-Induced Hepatocyte Injury via Inhibiting the Protein Kinase C-α/Nicotinamide-Adenine Dinucleotide Phosphate Oxidase Pathway. Front Pharmacol 2020; 10:1589. [PMID: 32116659 PMCID: PMC7025552 DOI: 10.3389/fphar.2019.01589] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/09/2019] [Indexed: 12/11/2022] Open
Abstract
Psoralea corylifolia L. (PC) is a traditional Chinese herb used to treat yang deficiency of the spleen and kidney in pediatric disease. Our previous studies have found that PC can alleviate the liver oxidative stress of juvenile mice with nonalcoholic steatohepatitis (NASH), and its mechanism is related to the inhibition of the protein kinase C-α (PKC-α)/nicotinamide-adenine dinucleotide phosphate oxidase (NOX) signaling pathway. The aim of this study was to confirm the aforementioned drug target in vitro and to conduct preliminary screening for some effective compounds of PC on the treatment of NASH. A primary hepatocyte model of non alcoholic fatty liver disease was established by palmitic acid. The existence of Psoralen, Isopsoralen, Neobavaisoflavone, Isobavachalcone, and Bakuchiol were identified by ultra-performance liquid chromatography. Then, five PC compounds were administered. Intracellular triglyceride and total cholesterol content, the cell supernatant alanine aminotransferase and aspartate aminotransferase, and hepatocellular superoxide anion were examined. The changes of PKC-α/NOX signaling pathways in hepatocytes were also determined. Furthermore, PKC-α activator phorbol 12-myristate 13-acetate was administered for 4 h before Psoralen intervention was conducted again to detect the changes of PKC-α/NOX signaling pathways. Our data demonstrated that Psoralen, Isopsoralen, and Isobavachalcone decreased intracellular content of triglyceride while all five PC compounds improved hepatocellular total cholesterol accumulation and hepatocyte damage in palmitic acid-induced primary hepatocyte model of non alcoholic fatty liver disease. All five PC compounds could also reduce hepatocytic superoxide anion levels, nicotinamide-adenine dinucleotide phosphate/reduced nicotinamide-adenine dinucleotide phosphate ratio, NOX activity as well as p47phox protein expression and PKCα activation in hepatocytes. Psoralen exhibited the best efficacy but the effectiveness was lost when pre-stimulated by phorbol 12-myristate 13-acetate. The results suggest that Psoralen, Isopsoralen, and Isobavachalcone could improve hepatocyte steatosis; five PC compounds could ameliorate hepatocyte injury, relieve oxidative stress, and downregulate the PKC-α/NOX signaling pathway of hepatocytes. In addition, Psoralen exhibits the best efficacy and a prospective PKC-α inhibitor pharmaceutical activity.
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Affiliation(s)
- Lishan Zhou
- Department of Integrated Traditional Chinese and Western Medicine, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianqiao Tang
- Department of Integrated Traditional Chinese and Western Medicine, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xuan Yang
- Department of Discipline Inspection and Supervision, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Dong
- Institute of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoli Xiong
- Department of Integrated Traditional Chinese and Western Medicine, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Juan Huang
- Department of Pathology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Linli Zhang
- Hubei University of Chinese Medicine, Wuhan, China
| | - Huan Qin
- Laboratory, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Suqi Yan
- Department of Integrated Traditional Chinese and Western Medicine, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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