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Zhang M, Yang J, Liang G, Yuan H, Wu Y, Li L, Yu T, Zhang Y, Wang J. FOXA1-Driven pathways exacerbate Radiotherapy-Induced kidney injury in colorectal cancer. Int Immunopharmacol 2024; 131:111689. [PMID: 38471364 DOI: 10.1016/j.intimp.2024.111689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 03/14/2024]
Abstract
OBJECTIVE This study aimed to investigate the role of FOXA1 in acute kidney injury (AKI) induced by radiotherapy in colorectal cancer. Although FOXA1 is known to be aberrantly expressed in malignant tumors, its contribution to AKI remains unclear. This study aimed to explore the involvement of FOXA1 in AKI induced by radiotherapy in colorectal cancer and its influence on the regulation of downstream target genes. METHODS Firstly, a transcriptome analysis was performed on mice to establish a radiation-induced AKI model, and qPCR was used to determine the expression of FOXA1 in renal cell injury models induced by X-ray irradiation. Additionally, FOXA1 was silenced using lentiviral vectors to investigate its effects on the apoptosis of mice with radiation-induced AKI and HK-2 cells. Next, bioinformatics analysis and various experimental validation methods such as ChIP assays, co-immunoprecipitation, and dual-luciferase reporter assays were employed to explore the relationship between FOXA1 and the downstream regulatory factors ITCH promoter and the ubiquitin ligase-degradable TXNIP. Finally, lentiviral overexpression or knockout techniques were used to investigate the impact of the FOXA1/ITCH/TXNIP axis on oxidative stress and the activation of inflammatory body NLRP3. RESULTS This study revealed that FOXA1 was significantly upregulated in the renal tissues of mice with radiation-induced AKI and in the injured HK-2 cells. Furthermore, in vitro cell experiments and animal experiments demonstrated that FOXA1 suppressed the transcription of the E3 ubiquitin ligase ITCH, thereby promoting apoptosis of renal tubular cells and causing renal tissue damage. Further in vivo animal experiments confirmed that TXNIP, a protein degraded by ITCH ubiquitination, could inhibit oxidative stress and the activation of NLRP3 inflammasome in the AKI mouse model. CONCLUSION FOXA1 enhances oxidative stress, cell apoptosis, and NLRP3 inflammasome activation by regulating the ITCH/TXNIP axis, thereby exacerbating radiotherapy-induced AKI.
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Affiliation(s)
- Minhai Zhang
- Department of Emergency Medicine, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Jingyuan Yang
- Department of Emergency Medicine, Second Affiliated Hospital of Zhejiang University, Key Laboratory of The Diagnosis and Treatment of Severe Trauma and Burns of Zhejiang Province, Clinical Research Center for Emergency and Critical Care Medicine of Zhejiang Province, Hangzhou 310009, China
| | - Guodong Liang
- Department of Emergency Medicine, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Huiqiong Yuan
- Department of Emergency Medicine, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Yanni Wu
- Department of Emergency Medicine, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Li Li
- Department of Emergency Medicine, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Tao Yu
- Department of Emergency Medicine, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Yuling Zhang
- Department of Cardiology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, China.
| | - Jingfeng Wang
- Department of Cardiology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou 510080, China; Guangdong Province Key Laboratory of Arrhythmia and Electrophysiology, Guangzhou 510120, China.
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Gahlot P, Kravic B, Rota G, van den Boom J, Levantovsky S, Schulze N, Maspero E, Polo S, Behrends C, Meyer H. Lysosomal damage sensing and lysophagy initiation by SPG20- ITCH. Mol Cell 2024; 84:1556-1569.e10. [PMID: 38503285 DOI: 10.1016/j.molcel.2024.02.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/30/2024] [Accepted: 02/27/2024] [Indexed: 03/21/2024]
Abstract
Cells respond to lysosomal membrane permeabilization by membrane repair or selective macroautophagy of damaged lysosomes, termed lysophagy, but it is not fully understood how this decision is made. Here, we uncover a pathway in human cells that detects lipid bilayer perturbations in the limiting membrane of compromised lysosomes, which fail to be repaired, and then initiates ubiquitin-triggered lysophagy. We find that SPG20 binds the repair factor IST1 on damaged lysosomes and, importantly, integrates that with the detection of damage-associated lipid-packing defects of the lysosomal membrane. Detection occurs via sensory amphipathic helices in SPG20 before rupture of the membrane. If lipid-packing defects are extensive, such as during lipid peroxidation, SPG20 recruits and activates ITCH, which marks the damaged lysosome with lysine-63-linked ubiquitin chains to initiate lysophagy and thus triages the lysosome for destruction. With SPG20 being linked to neurodegeneration, these findings highlight the relevance of a coordinated lysosomal damage response for cellular homeostasis.
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Affiliation(s)
- Pinki Gahlot
- Center of Medical Biotechnology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Bojana Kravic
- Center of Medical Biotechnology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Giulia Rota
- Center of Medical Biotechnology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Johannes van den Boom
- Center of Medical Biotechnology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Sophie Levantovsky
- Munich Cluster for Systems Neurology, Medical Faculty, Ludwig-Maximilians-University München, Munich, Germany
| | - Nina Schulze
- Imaging Center Campus Essen, Center of Medical Biotechnology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Elena Maspero
- IFOM ETS, The AIRC Institute of Molecular Oncology, Milan, Italy
| | - Simona Polo
- IFOM ETS, The AIRC Institute of Molecular Oncology, Milan, Italy
| | - Christian Behrends
- Munich Cluster for Systems Neurology, Medical Faculty, Ludwig-Maximilians-University München, Munich, Germany
| | - Hemmo Meyer
- Center of Medical Biotechnology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany.
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Tabanifar B, Moorthy A, Tsai HH, Kannan S, Verma CS, Sabapathy K. JNK mediates cell death by promoting the ubiquitination of the apurinic/apyrimidinic endonuclease APE1. Cell Rep 2023; 42:113123. [PMID: 37703179 DOI: 10.1016/j.celrep.2023.113123] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/19/2023] [Accepted: 08/28/2023] [Indexed: 09/15/2023] Open
Abstract
The c-Jun-NH2-terminal kinases (JNKs) regulate cell death, generally through the direct phosphorylation of both pro- and anti-apoptotic substrates. In this report, we demonstrate an alternate mechanism of JNK-mediated cell death involving the anti-apoptotic protein human apurinic/apyrimidinic endonuclease 1 (APE1). Treatment of cells with a variety of genotoxic stresses enhanced APE1-JNK (all isoforms of JNK1 or JNK2) interaction, specifically in cells undergoing apoptosis. Steady-state APE1 levels were decreased in these cells, in which APE1 is ubiquitinated and degraded in a JNK-dependent manner. Absence of JNKs reduced APE1 ubiquitination and increased its abundance. Mechanistically, the E3 ligase ITCH associates with both APE1 and JNK and is necessary for JNK-dependent APE1 ubiquitination and degradation. Structural models of the JNK-APE1 interaction support the observation of enhanced association of the complex in the presence of ubiquitin. The data together show a mechanism of JNK-mediated cell death by the degradation of APE1 through ITCH.
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Affiliation(s)
- Bahareh Tabanifar
- Divisions of Cellular & Molecular Research, National Cancer Centre Singapore, Singapore 168583, Singapore
| | - Anbalagan Moorthy
- Divisions of Cellular & Molecular Research, National Cancer Centre Singapore, Singapore 168583, Singapore
| | - Heng Hang Tsai
- Queensland Health Forensic and Scientific Services, Coopers Plains, QLD 4108, Australia
| | | | - Chandra S Verma
- Bioinformatics Institute, ASTAR, Singapore 138671, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Kanaga Sabapathy
- Divisions of Cellular & Molecular Research, National Cancer Centre Singapore, Singapore 168583, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore.
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Zhang L, Shao W, Li M, Liu S. ITCH-Mediated Ubiquitylation of ITGB3 Promotes Cell Proliferation and Invasion of Ectopic Endometrial Stromal Cells in Ovarian Endometriosis. Biomedicines 2023; 11:2506. [PMID: 37760946 PMCID: PMC10526369 DOI: 10.3390/biomedicines11092506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
Post-translational modification of proteins is involved in the occurrence of endometriosis (EM); however, the role of ubiquitination modification in EM remains unclear. Integrin β3 (ITGB3) is one of the β-subunits of integrins, which plays a key role in tumor progression. In this study, we investigated the roles of ITGB3 and ITCH, one of the ubiquitin E3 ligases, in ectopic endometrial stromal cells (ESCs) and EM. Primary ectopic ESCs and normal ESCs were isolated and purified. Western blot was used to detect the expression of ITGB3 and ITCH in ESCs. The interaction between ITGB3 and ITCH in ESCs was investigated by the co-immunoprecipitation and ubiquitylation analysis. With or without the overexpression of ITCH and/or ITGB3, the proliferation and invasion of ectopic ESCs were detected by the CCK8 assay and transwell migration assay, respectively. We found that ITGB3 is upregulated in ectopic ESCs from patients with EM. ITCH interacts with ITGB3 by co-immunoprecipitation, and ITCH-overexpressing significantly increased the ubiquitination of ITGB3. The data of the CCK8 assays showed that ITGB3 overexpression significantly promoted cell proliferation of ectopic ESCs at 12, 24, 48, and 72 h. The transwell migration assays showed that ITGB3 overexpression significantly enhanced the invasive ability. However, ITCH had the opposite effects in both assays. Our findings indicate that ITCH-mediated ubiquitylation of ITGB3 regulates the proliferation and invasion ability of ectopic ESCs in EM.
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Affiliation(s)
- Liansuo Zhang
- Department of Obstetrics and Gynecology, Jinshan Hospital, Fudan University, Shanghai 201508, China; (L.Z.); (W.S.)
| | - Wei Shao
- Department of Obstetrics and Gynecology, Jinshan Hospital, Fudan University, Shanghai 201508, China; (L.Z.); (W.S.)
| | - Mingqing Li
- Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200080, China
| | - Songping Liu
- Department of Obstetrics and Gynecology, Jinshan Hospital, Fudan University, Shanghai 201508, China; (L.Z.); (W.S.)
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Lim K, Rutherford EN, Sun D, Van den Boomen DJH, Edgar JR, Bang JH, Matesic LE, Lee JH, Lehner PJ, Marciniak SJ, Rawlins EL, Dickens JA. A novel human fetal lung-derived alveolar organoid model reveals mechanisms of surfactant protein C maturation relevant to interstitial lung disease. bioRxiv 2023:2023.08.30.555522. [PMID: 37693487 PMCID: PMC10491189 DOI: 10.1101/2023.08.30.555522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Alveolar type 2 (AT2) cells maintain lung health by acting as stem cells and producing pulmonary surfactant1-3. AT2 dysfunction underlies many lung diseases including interstitial lung disease (ILD), in which some inherited forms result from mislocalisation of surfactant protein C (SFTPC) variants4,5. Disease modelling and dissection of mechanisms remains challenging due to complexities in deriving and maintaining AT2 cells ex vivo. Here, we describe the development of expandable adult AT2-like organoids derived from human fetal lung which are phenotypically stable, can differentiate into AT1-like cells and are genetically manipulable. We use these organoids to test key effectors of SFTPC maturation identified in a forward genetic screen including the E3 ligase ITCH, demonstrating that their depletion phenocopies the pathological SFTPC redistribution seen for the SFTPC-I73T variant. In summary, we demonstrate the development of a novel alveolar organoid model and use it to identify effectors of SFTPC maturation necessary for AT2 health.
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Affiliation(s)
- Kyungtae Lim
- Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
| | | | - Dawei Sun
- Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
- Current address: Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, MA 02142, USA
| | - Dick J H Van den Boomen
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge CB2 0AW, UK
- Harvard Medical School, Department of Cell Biology, Harvard University, LHRRB building, 45 Shattuck Street, Boston MA 02115, USA
| | - James R Edgar
- Department of Pathology, University of Cambridge, Cambridge, CB2 1QP, UK
| | - Jae Hak Bang
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, University of Cambridge, Puddicombe Way, Cambridge CB2 0AW, UK
| | - Lydia E Matesic
- Department of Biological Sciences, University of South Carolina, 715 Sumter St., Columbia, SC 29208, USA
| | - Joo-Hyeon Lee
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
- Wellcome-MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, University of Cambridge, Puddicombe Way, Cambridge CB2 0AW, UK
| | - Paul J Lehner
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge CB2 0AW, UK
| | - Stefan J Marciniak
- Cambridge Institute for Medical Research, Cambridge, CB2 0XY, UK
- Royal Papworth Hospital, Papworth Road, Trumpington, CB2 0AY
| | - Emma L Rawlins
- Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
| | - Jennifer A Dickens
- Cambridge Institute for Medical Research, Cambridge, CB2 0XY, UK
- Royal Papworth Hospital, Papworth Road, Trumpington, CB2 0AY
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Prasad B, Gagarinova M, Sharma A. Five Things to Know About Pruritus in Patients on Dialysis. Can J Kidney Health Dis 2023; 10:20543581221149620. [PMID: 36711226 PMCID: PMC9880569 DOI: 10.1177/20543581221149620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 11/30/2022] [Indexed: 01/26/2023] Open
Affiliation(s)
- Bhanu Prasad
- Division of Nephrology, Department of
Medicine, Regina General Hospital, SK, Canada,Bhanu Prasad, Nephrologist, Division of
Nephrology, Department of Medicine, Regina General Hospital, 1440 14th Avenue,
Regina, SK S4P 0W5, Canada.
| | | | - Aditi Sharma
- Dr. T Bhanu Prasad Medical Prof Corp,
Regina, SK, Canada
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Zheng X, Huang D, Liu X, Liu QY, Gao X, Liu L. GSK3β/ ITCH/c-FLIP Axis Counteracts TRAIL-induced Apoptosis in Human Lung Adenocarcinoma Cells. Protein Pept Lett 2023; 30:242-249. [PMID: 36644866 DOI: 10.2174/0929866530666230112165515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/03/2022] [Accepted: 11/08/2022] [Indexed: 01/17/2023]
Abstract
AIMS Further investigation on the mechanism of action of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) in NSCLC would shed light on the understanding of TRAIL resistance and provide new clues for the counter-strategy. BACKGROUND Cellular FLICE-inhibitory protein (c-FLIP) is a critical inhibitor of TRAIL-induced apoptosis. Our previous study suggested that glycogen synthase kinase 3β (GSK3β) positively regulated c-FLIP expression in human lung adenocarcinoma cells. Meanwhile, other studies reported that c-FLIP was degraded by HECT-type E3 ligase ITCH (Itchy E3 Ubiquitin Protein Ligase) via the proteasome pathway. OBJECTIVE We will explore whether ITCH is involved in the expression regulation of c-FLIP positively controlled by GSK3β during the treatment of TRAIL. METHODS Human lung adenocarcinoma cells were used to stably overexpress and knockdown GSK3β. Quantitative real-time PCR (qRT-PCR) assay was used to test the expressional level of mRNA of genes. Western blot analysis was employed to detect the expression of proteins at the protein level. si RNA of ITCH was used to knock down its expression. TRAIL treatment was used to cause apoptosis. RESULTS In the present study, we have confirmed the ITCH protein degradation of c-FLIP and the downregulation of ITCH expression by GSK3β in lung adenocarcinoma cells. Moreover, ITCH silencing reversed the downregulation of c-FLIP protein caused by GSK3β-knockdown in the cells. Accordingly, TRAIL-induced apoptosis facilitated by GSK3β knockdown was blocked by the combined interference of ITCH. CONCLUSION These results suggested that GSK3β/ITCH axis regulated the stability of c-FLIP and impacting on TRAIL-induced apoptosis. Taken together, our study revealed a GSK3β/ITCH/c-FLIP axis that counteracts TRAIL-induced apoptosis in human lung adenocarcinoma cells.
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Affiliation(s)
- Xiaofen Zheng
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Donglan Huang
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Xiaohui Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Qiu-Yu Liu
- Department of Pathology, People's Hospital of Zhengzhou University, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - Xuejuan Gao
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Langxia Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
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Wu QQ, Yao Q, Hu TT, Wan Y, Xie QW, Zhao JH, Yuan Y, Tang QZ. Tax1 banding protein 1 exacerbates heart failure in mice by activating ITCH-P73-BNIP3-mediated cardiomyocyte apoptosis. Acta Pharmacol Sin 2022; 43:2562-2572. [PMID: 35948751 PMCID: PMC9525615 DOI: 10.1038/s41401-022-00950-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/26/2022] [Indexed: 11/09/2022] Open
Abstract
Tax1 banding protein 1 (Tax1bp1) was originally identified as an NF-κB regulatory protein that participated in inflammatory, antiviral and innate immune processes. Tax1bp1 also functions as an autophagy receptor that plays a role in autophagy. Our previous study shows that Tax1bp1 protects against cardiomyopathy in STZ-induced diabetic mice. In this study we investigated the role of Tax1bp1 in heart failure. Pressure overload-induced heart failure model was established in mice by aortic banding (AB) surgery, and angiotensin II (Ang II)-induced heart failure model was established by infusion of Ang II through osmotic minipump for 4 weeks. We showed that the expression levels of Tax1bp1 in the heart were markedly increased 2 and 4 weeks after AB surgery. Knockdown of Tax1bp1 in mouse hearts significantly ameliorated both AB- and Ang II infusion-induced heart failure parameters. On the contrary, AB-induced heart failure was aggravated in cardiac-specific Tax1bp1 transgenic mice. Similar results were observed in neonatal rat cardiomyocytes (NRCMs) under Ang II insult. We demonstrated that the pro-heart failure effect of Tax1bp1 resulted from its interaction with the E3 ligase ITCH to promote the transcription factor P73 ubiquitination and degradation, causing enhanced BCL2 interacting protein 3 (BNIP3)-mediated cardiomyocyte apoptosis. Knockdown ITCH or BNIP3 in NRCMs significantly reduced Ang II-induced apoptosis in vitro. Similarly, BNIP3 knockdown attenuated heart failure in cardiac-specific Tax1bp1 transgenic mice. In the left ventricles of heart failure patients, Tax1bp1 expression level was significantly increased; Tax1bp1 gene expression was negatively correlated with left ventricular ejection fraction in heart failure patients. Collectively, the Tax1bp1 increase in heart failure enhances ITCH-P73-BNIP3-mediated cardiomyocyte apoptosis and induced cardiac injury. Tax1bp1 may serve as a potent therapeutic target for the treatment of heart failure.• Cardiac Tax1bp1 transgene mice were more vulnerable to cardiac dysfunction under stress.• Cardiac Tax1bp1 transgene mice were more vulnerable to cardiac dysfunction under stress.• Knockout of Tax1bp1 in mouse hearts ameliorated heart failure induced by pressure overload.• Tax1bp1 interacts with the E3 ligase Itch to promote P73 ubiquitination and degradation, causing enhanced BNIP3-mediated apoptosis.• Tax1bp1 may become a target of new therapeutic methods for treating heart failure.
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Affiliation(s)
- Qing-Qing Wu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Qi Yao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Tong-Tong Hu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Ying Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Qing-Wen Xie
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Jin-Hua Zhao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Yuan Yuan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China
| | - Qi-Zhu Tang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
- Cardiovascular Research Institute, Wuhan University, Wuhan, 430060, China.
- Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, 430060, China.
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Sun Q, Wang BB, Wei W, Huang GC, Liu LL, Chen WW, Wang J, Zhao XY, Lu L, Fang R, Zhu CY, Chu XY. ITCH facilitates proteasomal degradation of TXNIP in hypoxia- induced lung cancer cells. Thorac Cancer 2022; 13:2235-2247. [PMID: 35811256 PMCID: PMC9346185 DOI: 10.1111/1759-7714.14552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 11/30/2022] Open
Abstract
Background Lung cancer (LC) is one of the most common cancers and a leading cause of cancer‐related deaths worldwide. In many pathological conditions, particularly in the tumor microenvironment, cells and tissues frequently exist in a hypoxic state. Here, we evaluated Itchy E3 ubiquitin protein ligase (ITCH) expression in LC cells following hypoxia treatment. Methods LC cell lines were treated with hypoxic condition. Cell migration, invasion, inflammation, reactive oxygen species (ROS) production, and apoptosis of LC cells were determined by wound healing assay, Transwell invasive assay, ELISA, DCFH‐DA staining, and flow cytometry, respectively. qPCR and WB were used to determine the expression of ITCH and TXNIP. Co‐IP was performed to assess the interaction between ITCH and TXNIP. Results ITCH expression was downregulated in LC cells under hypoxic conditions. Next, LC cells were subjected to hypoxic conditions and changes in cell viability and metastasis were determined. Hypoxic conditions resulted in increased migration and invasion abilities of LC cells. Intracellular reactive oxygen species (ROS) production, inflammation, and apoptosis were also promoted by hypoxia. We found that ITCH overexpression led to the proteasomal degradation of thioredoxin‐interacting protein (TXNIP), whereas the expression of the ITCH C830A mutant did not affect TXNIP levels in LC cells. The gain‐of‐function experiment demonstrated that migration, invasion, ROS generation, inflammation, and apoptosis of hypoxia‐conditioned LC cells were ameliorated by ITCH overexpression, whereas the ITCH C830A mutant did not cause any changes in these phenotypes. Furthermore, the contribution of TXNIP knockdown and ITCH overexpression to the hypoxia‐induced features in LC cells with ITCH C830A was found to be similar. Conclusion Our results suggest a novel mechanism underlying the changes in ITCH‐mediated malignant phenotypes of hypoxia‐conditioned LC cells via TXNIP.
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Affiliation(s)
- Qian Sun
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Bi-Bo Wang
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Wei Wei
- Department of Cardiothoracic Surgery, Jinling Hospital, Nanjing, China
| | - Gui-Chun Huang
- Department of Medical Oncology, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Lei-Lei Liu
- Department of Pathology, Jinling Hospital, Nanjing, China
| | - Wei-Wei Chen
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Jing Wang
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Xiao-Yue Zhao
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Lu Lu
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Rong Fang
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Chun-Yan Zhu
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
| | - Xiao-Yuan Chu
- Department of Medical Oncology, Jinling Hospital, Nanjing, China
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Ma J, Cai M, Mo Y, Fried JS, Tan X, Ma Y, Chen J, Han S, Xu B. The SPOP- ITCH Signaling Axis Protects Against Prostate Cancer Metastasis. Front Oncol 2021; 11:658230. [PMID: 34322378 PMCID: PMC8311740 DOI: 10.3389/fonc.2021.658230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 05/17/2021] [Indexed: 12/29/2022] Open
Abstract
Prostate cancer is one of the most common causes of cancer incidence and death in men, with the mortality caused primarily by the late-stage and metastatic forms of the disease. The mechanisms and molecular markers for prostate cancer metastasis are not fully understood. Speckle type Poz Protein (SPOP) is an E3 ubiquitin ligase adaptor that is often mutated in prostate cancer. In this study, we sequenced the SPOP gene in 198 prostate cancer patients and found 16 mutations in the cohort. Multivariate analysis revealed that SPOP mutations correlated with the clinical stage of the disease and strongly with metastasis. We identified ITCH as a candidate protein for SPOP-mediated degradation via mass spectrometry. We demonstrated the interaction between SPOP and ITCH, and found that the SPOP F133L mutation disrupted the SPOP-ITCH interaction, leading to a subsequent increase in the ITCH protein level. Further, we found that the SPOP knockdown led to higher levels of Epithelial- mesenchymal transition (EMT) proteins and increased cell invasion. Together, our results highlight the functional significance of the SPOP-ITCH pathway in prostate cancer metastasis.
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Affiliation(s)
- Jinlu Ma
- Department of Radiation Oncology, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China.,Department of Oncology, Southern Research Institute, and University Alabama at Birmingham, Birmingham, AL, United States
| | - Mengjiao Cai
- Department of Radiation Oncology, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yaqi Mo
- Department of Biochemistry and Molecular Biology, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Joshua S Fried
- Department of Oncology, Southern Research Institute, and University Alabama at Birmingham, Birmingham, AL, United States
| | - Xinyue Tan
- Department of Radiation Oncology, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yuan Ma
- Department of Radiation Oncology, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Jie Chen
- Department of Oncology, Southern Research Institute, and University Alabama at Birmingham, Birmingham, AL, United States
| | - Suxia Han
- Department of Radiation Oncology, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Bo Xu
- Department of Biochemistry and Molecular Biology, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,Center for Intelligent Oncology, Chongqing University Cancer Hospital and Chongqing University School of Medicine, Chongqing, China
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11
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Zheng Y, Schubert HL, Singh PK, Martins LJ, Engelman AN, D'Orso I, Hill CP, Planelles V. Cleavage and Polyadenylation Specificity Factor 6 Is Required for Efficient HIV-1 Latency Reversal. mBio 2021; 12:e0109821. [PMID: 34154414 DOI: 10.1128/mBio.01098-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The HIV-1 latent reservoir is the major barrier to an HIV cure. Due to low levels or lack of transcriptional activity, HIV-1 latent proviruses in vivo are not easily detectable and cannot be targeted by either natural immune mechanisms or molecular therapies based on protein expression. To target the latent reservoir, further understanding of HIV-1 proviral transcription is required. In this study, we demonstrate a novel role for cleavage and polyadenylation specificity factor 6 (CPSF6) in HIV-1 transcription. We show that knockout of CPSF6 hinders reactivation of latent HIV-1 proviruses by PMA in primary CD4+ cells. CPSF6 knockout reduced HIV-1 transcription, concomitant with a drastic reduction in the phosphorylation levels of Pol II and CDK9. Knockout of CPSF6 led to abnormal stabilization of protein phosphatase 2A (PP2A) subunit A, which then acted to dephosphorylate CDK9, downmodulating CDK9's ability to phosphorylate the Pol II carboxy-terminal domain. In agreement with this mechanism, incubation with the PP2A inhibitor, LB100, restored HIV-1 transcription in the CPSF6 knockout cells. Destabilization of PP2A subunit A occurs in the ubiquitin proteasome pathway, wherein CPSF6 acts as a substrate adaptor for the ITCH ubiquitin ligase. Our observations reveal a novel role of CPSF6 in HIV-1 transcription, which appears to be independent of its known roles in cleavage and polyadenylation and the targeting of preintegration complexes to the chromatin for viral DNA integration. IMPORTANCE CPSF6 is a cellular factor that regulates cleavage and polyadenylation of mRNAs and participates in HIV-1 infection by facilitating targeting of preintegration complexes to the chromatin. Our observations reveal a second role of CPSF6 in the HIV-1 life cycle that involves regulation of viral transcription through controlling the stability of protein phosphatase 2A, which in turn regulates the phosphorylation/dephosphorylation status of critical residues in CDK9 and Pol II.
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12
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Wang C, Li H, Wu L, Jiao X, Jin Z, Zhu Y, Fang Z, Zhang X, Huang H, Zhao L. Coiled-Coil Domain-Containing 68 Downregulation Promotes Colorectal Cancer Cell Growth by Inhibiting ITCH-Mediated CDK4 Degradation. Front Oncol 2021; 11:668743. [PMID: 33968776 PMCID: PMC8100586 DOI: 10.3389/fonc.2021.668743] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 03/30/2021] [Indexed: 12/31/2022] Open
Abstract
Coiled-coil domain-containing 68 (CCDC68) plays different roles in cancer and is predicted as a tumor suppressor in human colorectal cancer (CRC). However, the specific role of CCDC68 in CRC and the underlying mechanisms remain unknown. Here, we showed that CCDC68 expression was lower in CRC than that in corresponding normal tissues, and CCDC68 level was positively correlated with disease-free survival. Ectopic expression of CCDC68 decreased CRC cell proliferation in vitro and suppressed the growth of CRC xenograft tumors in vivo. CCDC68 caused G0/G1 cell cycle arrest, downregulated CDK4, and upregulated ITCH, the E3 ubiquitin ligase responsible for CDK4 protein degradation. This increased CDK4 degradation, which decreased CDK4 protein levels and inhibited CRC tumor growth. Collectively, the present results identify a novel CDK4 regulatory axis consisting of CCDC68 and ITCH, which suggest that CCDC68 is a promising target for the treatment of CRC.
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Affiliation(s)
- Cong Wang
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Hongyan Li
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Lei Wu
- Department of General Surgery, Heze Municipal Hospital, Heze, China
| | - Xueli Jiao
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Zihui Jin
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yujie Zhu
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Ziling Fang
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xiaodong Zhang
- Department of Colorectal anal surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Haishan Huang
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Lingling Zhao
- Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
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13
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Xu D, Chen PP, Zheng PQ, Yin F, Cheng Q, Zhou ZL, Xie HY, Li JY, Ni JY, Wang YZ, Chen SJ, Zhou L, Wang XX, Liu J, Zhang W, Lu LM. KLF4 initiates sustained YAP activation to promote renal fibrosis in mice after ischemia-reperfusion kidney injury. Acta Pharmacol Sin 2021; 42:436-450. [PMID: 32647339 PMCID: PMC8027004 DOI: 10.1038/s41401-020-0463-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 06/15/2020] [Indexed: 12/19/2022] Open
Abstract
Acute renal injury (AKI) causes a long-term risk for progressing into chronic kidney disease (CKD) and interstitial fibrosis. Yes-associated protein (YAP), a key transcriptional cofactor in Hippo signaling pathway, shuttles between the cytoplasm and nucleus, which is required for the renal tubular epithelial cells repair in the acute phase of AKI. In this study we investigated the role of YAP during ischemia-reperfusion (IR)-induced AKI to CKD. Mice were subjected to left kidney IR followed by removal of the right kidney on the day before tissue harvests. Mouse shRNA expression adenovirus (Ad-shYAP or Ad-shKLF4) and mouse KLF4 expression adenovirus (Ad-KLF4) were delivered to mice by intrarenal injection on D7 after IR. We showed that the expression and nucleus distribution of YAP were persistently increased until the end of experiment (D21 after IR). The sustained activation of YAP in post-acute phase of AKI was accompanied by renal dysfunction and interstitial fibrosis. Knockdown of YAP significantly attenuated IR-induced renal dysfunction and decreased the expression of fibrogenic factors TGF-β and CTGF in the kidney. We showed that the expression of the transcription factor KLF4, lined on the upstream of YAP, was also persistently increased. Knockdown on KLF4 attenuated YAP increase and nuclear translocation as well as renal functional deterioration and interstitial fibrosis in IR mice, whereas KLF4 overexpression caused opposite effects. KLF4 increased the expression of ITCH, and ITCH facilitated YAP nuclear translocation via degrading LATS1. Furthermore, we demonstrated in primary cultured renal tubular cells that KLF4 bound to the promoter region of YAP and positively regulates YAP expression. In biopsy sample from CKD patients, we also observed increased expression and nuclear distribution of YAP. In conclusion, the activation of YAP in the post-acute phase of AKI is implicated in renal functional deterioration and fibrosis although it exhibits beneficial effect in acute phase. Reprogramming factor KLF4 is responsible for the persistent activation of YAP. Blocking the activation of KLF4-YAP pathway might be a way to prevent the transition of AKI into CKD.
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Affiliation(s)
- Dan Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Pan-Pan Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Pei-Qing Zheng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Fan Yin
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Qian Cheng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Zhuan-Li Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Hong-Yan Xie
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Jing-Yao Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Jia-Yun Ni
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Yan-Zhe Wang
- Department of Nephrology, Shanghai Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Si-Jia Chen
- Department of Nephrology, Shanghai Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Li Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Xiao-Xia Wang
- Department of Nephrology, Shanghai Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200032, China
| | - Jun Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Wei Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| | - Li-Min Lu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
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Tang J, Kang Y, Zhou Y, Li X, Lan J, Wu L, Feng X, Peng Y. ALS-causing SOD1 mutants regulate occludin phosphorylation/ubiquitination and endocytic trafficking via the ITCH/Eps15/Rab5 axis. Neurobiol Dis 2021; 153:105315. [PMID: 33636390 DOI: 10.1016/j.nbd.2021.105315] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/10/2021] [Accepted: 02/22/2021] [Indexed: 01/08/2023] Open
Abstract
It is increasingly recognized that blood-spinal cord barrier (BSCB) breakdown is a hallmark of amyotrophic lateral sclerosis (ALS). BSCB integrity is disrupted prior to disease onset. Occludin, as the functional component of the endothelial barrier, is downregulated in mouse models expressing ALS-linked superoxide dismutase-1 (SOD1) mutants. However, the molecular mechanisms underlying the regulation of occludin expression remain elusive. Here, using SOD1G93A transgenic mice and endothelial cells expressing SOD1 mutants of different biochemical characteristics, we found that the SOD1 mutation disrupted endothelial barrier integrity and that the occludin expression level was downregulated with disease progression. Our mechanistic studies revealed that abnormal reactive oxygen species (ROS) in mutant SOD1-expressing cells induced occludin phosphorylation, which facilitated the subsequent occludin ubiquitination mediated by the E3 ligase ITCH. Moreover, ubiquitinated occludin interacted with Eps15 to initiate its internalization, then trafficked to Rab5-positive vesicles and be degraded by proteasomes, resulting in a reduction in cell surface localization and total abundance. Notably, either ITCH or Eps15 knockdown was sufficient to rescue occludin degradation and ameliorate endothelial barrier disruption. In conclusion, our study reveals a novel mechanism of occludin degradation mediated by ALS-causing SOD1 mutants and demonstrates a role for occludin in regulating BSCB integrity.
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15
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Cheng S, Xi Z, Chen G, Liu K, Ma R, Zhou C. Extracellular vesicle-carried microRNA-27b derived from mesenchymal stem cells accelerates cutaneous wound healing via E3 ubiquitin ligase ITCH. J Cell Mol Med 2020; 24:11254-11271. [PMID: 32845084 PMCID: PMC7576224 DOI: 10.1111/jcmm.15692] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/07/2020] [Accepted: 07/12/2020] [Indexed: 02/06/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have been highlighted as promising candidate cells in relation to cutaneous wound healing. The current study aimed to investigate whether MSC-derived extracellular vesicles (EVs) could transfer microRNA-27b (miR-27b) to influence cutaneous wound healing. The miR-27b expression was examined in the established cutaneous wound mouse model, and its correlation with the wound healing rate was evaluated by Pearson's correlation analysis. The identified human umbilical cord MSC-derived EVs were co-cultured with human immortal keratinocyte line HaCaT and human skin fibroblasts (HSFs). The mice with cutaneous wound received injections of MSC-derived EVs. The effects of EVs or miR-27b loaded on wound healing and cellular functions were analysed via gain- and loss-of-function approaches in the co-culture system. Dual-luciferase reporter gene assay was employed to verify the relationship between miR-27b and Itchy E3 ubiquitin protein ligase (ITCH). Rescue experiments were conducted to investigate the underlying mechanisms associated with the ITCH/JUNB/inositol-requiring enzyme 1α (IRE1α) axis. miR-27b was down-regulated in the mouse model, with its expression found to be positively correlated with the wound healing rate. Abundant miR-27b was detected in the MSC-derived EVs, while EV-transferred miR-27b improved cutaneous wound healing in mice and improved proliferation and migration of HaCaT cells and HSFs in vitro. As a target of miR-27b, ITCH was found to repress cell proliferation and migration. ITCH enhanced the JUNB ubiquitination and degradation, ultimately inhibiting JUNB and IRE1α expressions and restraining wound healing. Collectively, MSC-derived EVs transferring miR-27b can promote cutaneous wound healing via ITCH/JUNB/IRE1α signalling, providing insight with clinical implications.
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Affiliation(s)
- Shihuan Cheng
- Department of Rehabilitation, the First Hospital of Jilin University, Changchun, China
| | - Zhiyu Xi
- Department of Vascular Surgery, the First Hospital of Jilin University (Eastern Division), Changchun, China
| | - Guang Chen
- Department of Vascular Surgery, the First Hospital of Jilin University (Eastern Division), Changchun, China
| | - Kai Liu
- Department of Vascular Surgery, the First Hospital of Jilin University (Eastern Division), Changchun, China
| | - Renshi Ma
- Department of Vascular Surgery, the First Hospital of Jilin University (Eastern Division), Changchun, China
| | - Chen Zhou
- Personnel Department, the First Hospital of Jilin University, Changchun, China
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16
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Sun MX, An Q, Chen LM, Guo L. MIR-520f Regulated Itch Expression and Promoted Cell Proliferation in Human Melanoma Cells. Dose Response 2020; 18:1559325820918450. [PMID: 32425721 PMCID: PMC7218305 DOI: 10.1177/1559325820918450] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 03/08/2020] [Accepted: 03/11/2020] [Indexed: 12/31/2022] Open
Abstract
Accumulating evidence suggests that abnormal expression and dysfunction of microRNA is involved in development of cancers. However, the function of miR-520f especially in human melanoma remains elusive. In the current study, the underlying function of miR-520f in human melanoma was investigated. Our study demonstrated that the miR-520f level in human melanoma cell lines and clinical tissues was increased. Overexpression of miR-520f promoted cell proliferation by using the 3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide assay, colony formation, anchorage-independent growth assay, and 5-bromo-2-deoxyuridine assays. Furthermore, we revealed that miR-520f could interact with circular RNA Itchy E3 ubiquitin protein ligase (ITCH) 3′-untranslated region and suppress ITCH expression in human melanoma cells. The inhibitory effect of miR-520f-in could be partially restored by knockdown of ITCH in human melanoma cells. In summary, this study provides novel insights into miR-520f act as a crucial role in the regulation of human melanoma cell growth via regulating ITCH, which might be a potential biomarker and therapeutic target of human melanoma.
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Affiliation(s)
- Ming-Xia Sun
- Department of Dermatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
| | - Qun An
- Department of Burns and Plastic Surgery, The Second People Hospital of Dezhou, People's Republic of China
| | - La-Mei Chen
- Department of Dermatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
| | - Ling Guo
- Department of Dermatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
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17
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Yin Q, Wyatt CJ, Han T, Smalley KSM, Wan L. ITCH as a potential therapeutic target in human cancers. Semin Cancer Biol 2020; 67:117-130. [PMID: 32165318 DOI: 10.1016/j.semcancer.2020.03.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/26/2020] [Accepted: 03/04/2020] [Indexed: 12/13/2022]
Abstract
The ITCH/AIP4 ubiquitin E3 ligase was discovered independently by two groups searching for atrophin-1 interacting proteins and studying the genetics of mouse coat color alteration, respectively. ITCH is classified as a NEDD4 family E3 ligase featured with the C-terminal HECT domain for E3 ligase function and WW domains for substrate recruiting. ITCH deficiency in the mouse causes severe multi-organ autoimmune disease. Its roles in maintaining a balanced immune response have been extensively characterized over the past two and a half decades. A wealth of reports demonstrate a multifaceted role of ITCH in human cancers. Given the versatility of ITCH in catalyzing both proteolytic and non-proteolytic ubiquitination of its over fifty substrates, ITCH's role in malignancies is believed to be context-dependent. In this review, we summarize the downstream substrates of ITCH, the functions of ITCH in both tumor cells and the immune system, as well as the implications of such functions in human cancers. Moreover, we describe the upstream regulatory mechanisms of ITCH and the efforts have been made to target ITCH using small molecule inhibitors.
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Affiliation(s)
- Qing Yin
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Clayton J Wyatt
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Tao Han
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Keiran S M Smalley
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA; Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA
| | - Lixin Wan
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA; Department of Cutaneous Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA.
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Baillet N, Krieger S, Carnec X, Mateo M, Journeaux A, Merabet O, Caro V, Tangy F, Vidalain PO, Baize S. E3 Ligase ITCH Interacts with the Z Matrix Protein of Lassa and Mopeia Viruses and Is Required for the Release of Infectious Particles. Viruses 2019; 12:E49. [PMID: 31906112 DOI: 10.3390/v12010049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/27/2019] [Accepted: 12/29/2019] [Indexed: 12/18/2022] Open
Abstract
Lassa virus (LASV) and Mopeia virus (MOPV) are two closely related, rodent-born mammarenaviruses. LASV is the causative agent of Lassa fever, a deadly hemorrhagic fever endemic in West Africa, whereas MOPV is non-pathogenic in humans. The Z matrix protein of arenaviruses is essential to virus assembly and budding by recruiting host factors, a mechanism that remains partially defined. To better characterize the interactions involved, a yeast two-hybrid screen was conducted using the Z proteins from LASV and MOPV as a bait. The cellular proteins ITCH and WWP1, two members of the Nedd4 family of HECT E3 ubiquitin ligases, were found to bind the Z proteins of LASV, MOPV and other arenaviruses. The PPxY late-domain motif of the Z proteins is required for the interaction with ITCH, although the E3 ubiquitin-ligase activity of ITCH is not involved in Z ubiquitination. The silencing of ITCH was shown to affect the replication of the old-world mammarenaviruses LASV, MOPV, Lymphocytic choriomeningitis virus (LCMV) and to a lesser extent Lujo virus (LUJV). More precisely, ITCH was involved in the egress of virus-like particles and the release of infectious progeny viruses. Thus, ITCH constitutes a novel interactor of LASV and MOPV Z proteins that is involved in virus assembly and release.
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19
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Zhang WC, Yang JH, Liu GH, Yang F, Gong JL, Jia MG, Zhang MJ, Zhao LS. miR-34b/c regulates doxorubicin-induced myocardial cell injury through ITCH. Cell Cycle 2019; 18:3263-3274. [PMID: 31627713 DOI: 10.1080/15384101.2019.1673618] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Objective: To determine the underlying mechanism of miR-34b/c in regulating doxorubicin (Dox)-induced myocardial cell injury.Methods: The viability of mouse myocardial cells HL-1 was detected by MTT assay. The apoptosis of HL-1 cells was detected by TUNEL assay. mRNA expressions of ITCH, TNF-α and IL-6 were measured by qRT-PCR. Protein levels of ITCH, NF-κB, TNF-α and IL-6 were measured by western blot. Dual luciferase assay was performed to detect the regulation of miR-34b/c on ITCH. Mouse model of cardiomyopathy was induced by intraperitoneal injection of Dox.Results: Dox reduced HL-1 cell viability and activated NF-κB pathway in HL-1 cells. miR-34b/c expressions were gradually up-regulated and ITCH expression was gradually down-regulated in Dox-treated HL-1 cells. miR-34b/c expression had negative correlation with the mRNA expression of ITCH. Besides, ITCH was a target of miR-34b/c. miR-34b/c mimic reduced cell viability, suppressed ITCH expression, increased TNF-α and IL-6 level, and promoted NF-κB expression in nucleus and cytoplasm of HL-1 cells. Whereas silencing miR-34 protected HL-1 cells through regulating ITCH. Finally, we demonstrated miR-34 antagomir-protected myocardial cells in mouse model of cardiomyopathy.Conclusion: miR-34b/c decreased HL-1 cell viability and promoted the secretion of proinflammatory cytokines in Dox-induced myocardial cells through ITCH/NF-κB pathway.
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Affiliation(s)
- Wen-Cai Zhang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Jin-Hua Yang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Guang-Hui Liu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Fan Yang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Jun-Long Gong
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Meng-Ge Jia
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Meng-Juan Zhang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Luo-Sha Zhao
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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Yagi H, Onoyama I, Asanoma K, Hori E, Yasunaga M, Kodama K, Kijima M, Ohgami T, Kaneki E, Okugawa K, Yahata H, Kato K. Gα 13-mediated LATS1 down-regulation contributes to epithelial-mesenchymal transition in ovarian cancer. FASEB J 2019; 33:13683-13694. [PMID: 31569999 DOI: 10.1096/fj.201901278r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Gα13, a heterotrimeric G-protein of the Gα12/13 subfamily, is associated with aggressive phenotypes in various human cancers. However, the mechanisms by which Gα13 promotes cancer progression have not been fully elucidated. Here, we demonstrate that the activation of Gα13 induces epithelial-mesenchymal transition in ovarian cancer (OvCa) cells through down-regulation of large tumor suppressor kinase (LATS) 1, a critical component of the Hippo signaling pathway. A synthetic biology approach using a mutant GPCR and chimeric G-protein revealed that Gα13-regulated phosphorylation of LATS1 at serine 909 within its activation loop induced recruitment of the itchy E3 ubiquitin protein ligase to trigger LATS1 degradation. Our findings uncover novel mechanisms through which Gα13 activation induces dysregulation of the Hippo signaling pathway, which leads to aggressive cancer phenotypes, and thereby identify a potential target for preventing the metastatic spread of OvCa.-Yagi, H., Onoyama, I., Asanoma, K., Hori, E., Yasunaga, M., Kodama, K., Kijima, M., Ohgami, T., Kaneki, E., Okugawa, K., Yahata, H., Kato, K. Gα13-mediated LATS1 down-regulation contributes to epithelial-mesenchymal transition in ovarian cancer.
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Affiliation(s)
- Hiroshi Yagi
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Ichiro Onoyama
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kazuo Asanoma
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Emiko Hori
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masafumi Yasunaga
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Keisuke Kodama
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masako Kijima
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tatsuhiro Ohgami
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eisuke Kaneki
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kaoru Okugawa
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hideaki Yahata
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kiyoko Kato
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Le Clorennec C, Lazrek Y, Dubreuil O, Sampaio C, Larbouret C, Lanotte R, Poul MA, Barret JM, Prost JF, Pèlegrin A, Chardès T. ITCH-dependent proteasomal degradation of c-FLIP induced by the anti-HER3 antibody 9F7-F11 promotes DR5/caspase 8-mediated apoptosis of tumor cells. Cell Commun Signal 2019; 17:106. [PMID: 31443721 PMCID: PMC6708219 DOI: 10.1186/s12964-019-0413-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 08/05/2019] [Indexed: 12/13/2022] Open
Abstract
Background HER3/ErbB3 receptor deletion or blockade leads to tumor cell apoptosis, whereas its overexpression confers anti-cancer drug resistance through upregulation of protective mechanisms against apoptosis. We produced the anti-HER3 antibody 9F7-F11 that promotes HER3 ubiquitination and degradation via JNK1/2-dependent activation of the E3 ubiquitin ligase ITCH, and that induces apoptosis of cancer cells. Cellular FLICE-like inhibitory protein (c-FLIP) is a key regulator of apoptotic pathways. Here, we wanted to determine the mechanisms underlying the pro-apoptotic effect of 9F7-F11. Methods Anti-HER3 antibody-induced apoptosis was assessed by western blot, and by flow cytometry measurement of Annexin V/7-AAD-labelled tumor cells (BxPC3, MDA-MB-468 and DU145 cell lines). c-FLIP/ITCH interaction and subsequent degradation/ubiquitination were investigated by co-immunoprecipitation of ITCH-silenced vs scramble control cells. The relationship between ITCH-mediated c-FLIP degradation and antibody-induced apoptosis was examined by western blot and flow cytometry of tumor cells, after ITCH RNA interference or by pre-treatment with ITCH chemical inhibitor chlorimipramine (CI). Results Following incubation with 9F7-F11, cancer cell apoptosis occurs through activation of caspase-8, − 9 and − 3 and the subsequent cleavage of poly (ADP-ribose) polymerase (PARP). Moreover we showed that ubiquitination and proteasomal degradation of the anti-apoptotic protein c-FLIP was mediated by USP8-regulated ITCH recruitment. This effect was abrogated by ITCH- and USP8-specific RNA interference (siRNA), or by the ITCH chemical inhibitor CI. Specifically, ITCH silencing or CI blocked 9F7-F11-induced caspase-8-mediated apoptosis of tumor cells, and restored c-FLIP expression. ITCH-silencing or CI concomitantly abrogated HER3-specific antibody-induced apoptosis of Annexin V/7-AAD-labelled BxPC3 cells. 9F7-F11 favored the extrinsic apoptosis pathway by inducing TRAIL-R2/DR5 upregulation and TRAIL expression that promoted the formation of death-inducing signaling complex (DISC), leading to caspase-8-mediated apoptosis. Incubation with 9F7-F11 also induced BID cleavage, BAX upregulation and BIM expression, which initiated the caspase-9/3-mediated mitochondrial death pathway. The anti-HER3 antibody pro-apoptotic effect occurred concomitantly with downregulation of the pro-survival proteins c-IAP2 and XIAP. Conclusions The allosteric non-neuregulin competing modulator 9F7-F11, sensitizes tumor cells to DR5/caspase-8-mediated apoptosis through ITCH-dependent downregulation of c-FLIP. Graphical abstract ![]()
Electronic supplementary material The online version of this article (10.1186/s12964-019-0413-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christophe Le Clorennec
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France.,Present Address: UCSD School of Medicine, Moores Cancer Center, La Jolla, CA, 92093-0815, USA
| | - Yassamine Lazrek
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France.,Present Address: Institut Pasteur de Guyane, F- 97306, Cayenne, France
| | - Olivier Dubreuil
- GamaMabs Pharma SA, Centre Pierre Potier, F-31106, Toulouse, France
| | - Carla Sampaio
- Laboratoire d'Immunologie et d'Immunothérapie des Cancers, EA7269, Université Bourgogne Franche-Comté, F-21000, Dijon, France
| | - Christel Larbouret
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France
| | - Romain Lanotte
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France
| | - Marie-Alix Poul
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France
| | - Jean-Marc Barret
- GamaMabs Pharma SA, Centre Pierre Potier, F-31106, Toulouse, France
| | | | - André Pèlegrin
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France
| | - Thierry Chardès
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Université de Montpellier, Institut régional du Cancer de Montpellier (ICM), F-34298, Montpellier, France. .,Centre National de la Recherche Scientifique (CNRS), Paris, France.
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Wang S, Wu Y, Xu Y, Tang X. miR-10b promoted melanoma progression through Wnt/β-catenin pathway by repressing ITCH expression. Gene 2019; 710:39-47. [PMID: 31129246 DOI: 10.1016/j.gene.2019.05.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 05/03/2019] [Accepted: 05/22/2019] [Indexed: 01/23/2023]
Abstract
Dysregulation of microRNAs (miRNAs) have been reported to contribute to malignant progression in melanoma. However, the roles and mechanisms of several miRNAs in melanoma remain poorly understood. In our study, we showed that miR-10b was significantly up-regulated in melanoma tissues and cell lines, and was associated with overall survival of melanoma patients. Inhibition of miR-10b dramatically suppressed melanoma cell proliferation, migration and invasion in vitro and inhibited tumor growth in vivo. Moreover, we defined ITCH as a direct and functional downstream target of miR-10b, and showed that there was an inverse correlation between the expression of ITCH and miR-10b on melanoma tissues. Down-regulation of ITCH partially attenuated the inhibitory effects of miR-10b inhibition on melanoma cell proliferation, migration and invasion. Furthermore,we found that miR-10b exerted its effects on melanoma by regulating the Wnt/β-catenin pathway. Taken together, our results demonstrated that miR-10b was an important epigenetic modifier, promoting melanoma progression through regulating ITCH/Wnt/β-catenin pathway. These results offer a new strategy for epigenetic cancer therapy.
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Affiliation(s)
- Shengqiang Wang
- General Department, Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, No. 181 Han Yu Road, Shapingba District, Chongqing 400030, China.
| | - Yi Wu
- General Department, Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, No. 181 Han Yu Road, Shapingba District, Chongqing 400030, China
| | - Yan Xu
- General Department, Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, No. 181 Han Yu Road, Shapingba District, Chongqing 400030, China
| | - Xianjun Tang
- General Department, Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, No. 181 Han Yu Road, Shapingba District, Chongqing 400030, China
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Brittain HK, Feary J, Rosenthal M, Spoudeas H, Wilson LC. Biallelic human ITCH variants causing a multisystem disease with dysmorphic features: A second report. Am J Med Genet A 2019; 179:1346-1350. [PMID: 31091003 DOI: 10.1002/ajmg.a.61169] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 01/16/2019] [Accepted: 03/21/2019] [Indexed: 01/10/2023]
Abstract
We report a 23 year old female with biallelic truncating variants in the ITCH (Itchy E3 Ubiquitin protein ligase, mouse homolog of; OMIM60649) gene associated with marked short stature, severe early onset chronic lung disease resembling asthma, dysmorphic facial features, and symmetrical camptodactyly of the fingers but normal intellect. The condition has only been reported once previously (Lohr et al., American Journal of Human Genetics, 2010, 86, 447-453) in 10 children from an Old Order Amish family found to have a homozygous frameshift truncating variant in association with failure to thrive, chronic lung disease, motor and cognitive delay, and variable autoimmune diseases including autoimmune hepatitis, enteropathy, hypothyroidism, and diabetes. The condition is listed in OMIM as Autoimmune disease, Multisystem with Facial Dysmorphism (OMIM613385). The clinical course as well as the dysmorphic facial and limb features overlap closely with our patient. We believe the triad of marked syndromic short stature, chronic lung disease, and dysmorphism (with or without cognitive impairment and wider autoimmune involvement) is distinctive.
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Affiliation(s)
- Helen K Brittain
- Department of Clinical Genetics, North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK.,Clinical Genetics Unit, Birmingham Women's & Children's Hospital NHS Foundation Trust, Birmingham, UK
| | - Johanna Feary
- Department of Occupational & Environmental Medicine, Royal Brompton & Harefield NHS Foundation Trust, London, UK
| | - Mark Rosenthal
- Department of Paediatric Respiratory Medicine, Royal Brompton & Harefield NHS Foundation Trust, London, UK
| | - Helen Spoudeas
- Department of Endocrinology, Great Ormond Street Hospital for Children NHS Foundation Trust & University College Hospital, London, UK
| | | | - Louise C Wilson
- Department of Clinical Genetics, North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
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24
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Beasley SA, Bardhi R, Spratt DE. 1H, 13C, and 15N resonance assignments of the C-terminal lobe of the human HECT E3 ubiquitin ligase ITCH. Biomol NMR Assign 2019; 13:15-20. [PMID: 30229450 PMCID: PMC6439258 DOI: 10.1007/s12104-018-9843-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/14/2018] [Indexed: 06/08/2023]
Abstract
ITCH (aka Atrophin-1-interacting protein 4) is a prominent member of the NEDD4 HECT (Homologous to E6AP C-Terminus) E3 ubiquitin ligase family that regulates numerous cellular functions including inflammatory responses through T-cell activation, cell differentiation, and apoptosis. Known intracellular targets of ITCH-dependent ubiquitylation include receptor proteins, signaling molecules, and transcription factors. The HECT C-terminal lobe of ITCH contains the conserved catalytic cysteine required for the covalent attachment of ubiquitin onto a substrate and polyubiquitin chain assembly. We report here the complete experimentally determined 1H, 13C, and 15N backbone and sidechain resonance assignments for the HECT C-terminal lobe of ITCH (residues 784-903) using heteronuclear, multidimensional NMR spectroscopy. These resonance assignments will be used in future NMR-based studies to examine the role of dynamics and conformational flexibility in HECT-dependent ubiquitylation as well as deciphering the structural and biochemical basis for polyubiquitin chain synthesis and specificity by ITCH.
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Affiliation(s)
- Steven A Beasley
- Gustaf H. Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA, 01610, USA
| | - Roela Bardhi
- Gustaf H. Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA, 01610, USA
| | - Donald E Spratt
- Gustaf H. Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA, 01610, USA.
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Li M, An W, Xu L, Lin Y, Su L, Liu X. The arginine methyltransferase PRMT5 and PRMT1 distinctly regulate the degradation of anti-apoptotic protein CFLAR L in human lung cancer cells. J Exp Clin Cancer Res. 2019;38:64. [PMID: 30736843 DOI: 10.1186/s13046-019-1064-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/27/2019] [Indexed: 02/05/2023] Open
Abstract
Background CFLARL, also known as c-FLIPL, is a critical anti-apoptotic protein that inhibits activation of caspase 8 in mammalian cells. Previous studies have shown that arginine 122 of CFLARL can be mono-methylated. However, the precise role of arginine methyltransferase of CFLARL remains unknown. PRMT5 and PRMT1, which are important members of the PRMT family, catalyze the transfer of methyl groups to the arginine of substrate proteins. PRMT5 can monomethylate or symmetrically dimethylate arginine residues, while PRMT1 can monomethylate or asymmetrically dimethylate arginine residues. Methods Lung cancer cells were cultured following the standard protocol and the cell lysates were prepared to detect the given proteins by Western Blot analysis, and the protein interaction was assayed by co-immunoprecipitation (Co-IP) or GST pull-down assay. CFLARL ubiquitination level was evaluated by proteasomal inhibitor treatment combined with HA-Ub transfection and WB assay. PRMT1 and PRMT5 genes were knocked down by siRNA technique. Results We show that PRMT5 up-regulated the protein levels of CFLARL by decreasing the ubiquitination and increasing its protein level. Additionally, PRMT1 down-regulated the protein level of CFLARL by increasing the ubiquitination and degradation. The overexpression of PRMT5 can inhibit the interaction between CFLARL and ITCH, which has been identified as an E3 ubiquitin ligase of CFLARL, while overexpressed PRMT1 enhances the interaction between CFLARL and ITCH. Furthermore, we verified that dead mutations of PRMT5 or PRMT1 have the same effects on CFLARL as the wild-type ones have, suggesting it is the physical interaction between CFLAR and PRMT1/5 that regulates CFLARL degradation other than its enzymatic activity. Finally, we showed that PRMT5 and PRMT1 could suppress or facilitate apoptosis induced by doxorubicin or pemetrexed by affecting CFLARL in NSCLC cells. Conclusions PRMT5 and PRMT1 mediate the distinct effects on CFLARL degradation by regulating the binding of E3 ligase ITCH in NSCLC cells. This study identifies a cell death mechanism that is fine-tuned by PRMT1/5 that modulate CFLARL degradation in human NSCLC cells. Electronic supplementary material The online version of this article (10.1186/s13046-019-1064-8) contains supplementary material, which is available to authorized users.
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Neidhardt S, Garbade J, Emrich F, Klaeske K, Borger MA, Lehmann S, Jawad K, Dieterlen MT. Ischemic Cardiomyopathy Affects the Thioredoxin System in the Human Myocardium. J Card Fail 2019; 25:204-212. [PMID: 30721734 DOI: 10.1016/j.cardfail.2019.01.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 12/03/2018] [Accepted: 01/23/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Oxidative stress due to reactive oxygen species (ROS) production is a key factor in the development of heart failure (HF). This study investigated the thioredoxin (Trx) system, which plays a major role in antioxidant defense, in patients suffering from ischemic (ICM) or dilated (DCM) cardiomyopathy. METHODS AND RESULTS Myocardial tissue from ICM (n = 13) and DCM (n = 13) patients, as well as septal tissue of patients with aortic stenosis but without diagnosed hypertrophic cardiomyopathy or subaortic stenosis (control; n = 12), was analyzed for Trx1, Trx-interacting protein (TXNIP) and E3 ligase ITCH (E3 ubiquitin-protein ligase Itchy homolog) expression. Trx-reductase 1 (TXNRD1) amount and activity, cytosolic cytochrome C content, and apoptosis markers were quantified by means of enzyme-linked immunosorbent assay and multiplexing. Compared with control samples, ITCH and Trx1 expression, TXNRD1 amount and activity were reduced and TXNIP expression was increased in ICM (ITCH: P = .013; Trx1: P = .028; TXNRD1 amount: P = .035; TXNRD1 activity: P = .005; TXNIP: P = .014) but not in DCM samples. A higher level of the downstream apoptosis marker caspase-9 (ICM: 582 ± 262 MFI [P = .995]; DCM: 1251 ± 548 MFI [P = .002], control: 561 ± 214 MFI) was detected in DCM tissue. A higher expression of Bcl-2 was found in DCM (P = .011). CONCLUSION The Trx system was impaired in ICM but not in DCM. ITCH appeared to be responsible for the down-regulation of the Trx system. ROS-induced mitochondrial instability appeared to play a role in DCM.
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Affiliation(s)
- Stephan Neidhardt
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Jens Garbade
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Fabian Emrich
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Kristin Klaeske
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Michael A Borger
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Sven Lehmann
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Khalil Jawad
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany
| | - Maja-Theresa Dieterlen
- Department of Cardiac Surgery, University of Leipzig, Heart Center Leipzig, Helios Clinic, Leipzig, Germany.
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Abstract
The aim of this study was to investigate the role of lncRNA NEAT1 (nuclear enriched abundant transcript 1) in regulating Th2 cell differentiation. The overexpression vectors of NEAT1 and ITCH, and siRNA targeting NEAT1, EZH2 (enhancer of zeste homolog 2) and STAT6 (signal transducer and activator of transcription 6) were transfected into CD4+T cells. The mRNA expressions of ITCH and STAT6 were analyzed by qRT-PCR and western blotting. The levels of Th2 cytokines were detected by ELISA assay. RIP and ChIP assays were performed to analyze the association between NEAT1 and EZH2 as well as EZH2 and STAT6, respectively. Results showed that NEAT1 significantly repressed ITCH expression and increased STAT6 expression as well as the levels of IL-4, IL-5 and IL-13 in CD4+T cells. RIP and ChIP assays revealed that NEAT1 bound to EZH2 and EZH2 was recruited to the promoter region of ITCH in CD4+T cells. Silencing EZH2 significantly promoted STAT6 for ubiquitination. Furthermore, NEAT targeted STAT6 for ubiquitination and elevated levels of Th2 cytokines by regulating EZH2/ITCH axis. In conclusion, our data indicated that NEAT1 promotes Th2 cell differentiation through the EZH2/ITCH/STAT6 axis.
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Affiliation(s)
- Shuman Huang
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China.,b The Academy of medical sciences , Zhengzhou University , Zhengzhou , China
| | - Dong Dong
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Yaqian Zhang
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Zhuo Chen
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Jing Geng
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China.,b The Academy of medical sciences , Zhengzhou University , Zhengzhou , China
| | - Yulin Zhao
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
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Abu el Maaty MA, Dabiri Y, Almouhanna F, Blagojevic B, Theobald J, Büttner M, Wölfl S. Activation of pro-survival metabolic networks by 1,25(OH) 2D 3 does not hamper the sensitivity of breast cancer cells to chemotherapeutics. Cancer Metab 2018; 6:11. [PMID: 30181873 PMCID: PMC6116450 DOI: 10.1186/s40170-018-0183-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/01/2018] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND We have previously identified 1,25-dihydroxyvitamin D3 [1,25(OH)2D3], the bioactive form of vitamin D3, as a potent regulator of energy-utilization and nutrient-sensing pathways in prostate cancer cells. In the current study, we investigated the effects of 1,25(OH)2D3 on breast cancer (BCa) cell metabolism using cell lines representing distinct molecular subtypes, luminal (MCF-7 and T-47D), and triple-negative BCa (MDA-MB-231, MDA-MB-468, and HCC-1143). METHODS 1,25(OH)2D3's effect on BCa cell metabolism was evaluated by employing a combination of real-time measurements of glycolysis/oxygen consumption rates using a biosensor chip system, GC/MS-based metabolomics, gene expression analysis, and assessment of overall energy levels. The influence of treatment on energy-related signaling molecules was investigated by immunoblotting. RESULTS We show that 1,25(OH)2D3 significantly induces the expression and activity of the pentose phosphate pathway enzyme glucose-6-phosphate dehydrogenase (G6PD) in all BCa cell lines, however differentially influences glycolytic and respiratory rates in the same cells. Although 1,25(OH)2D3 treatment was found to induce seemingly anti-oxidant responses in MCF-7 cells, such as increased intracellular serine levels, and reduce the expression of its putative target gene thioredoxin-interacting protein (TXNIP), intracellular reactive oxygen species levels were found to be elevated. Serine accumulation in 1,25(OH)2D3-treated cells was not found to hamper the efficacy of chemotherapeutics, including 5-fluorouracil. Detailed analyses of the nature of TXNIP's regulation by 1,25(OH)2D3 included genetic and pharmacological inhibition of signaling molecules and metabolic enzymes including AMP-activated protein kinase and G6PD, as well as by studying the ITCH (E3 ubiquitin ligase)-TXNIP interaction. While these investigations demonstrated minimal involvement of such pathways in the observed non-canonical regulation of TXNIP, inhibition of estrogen receptor (ER) signaling by tamoxifen mirrored the reduction of TXNIP levels by 1,25(OH)2D3, demonstrating that the latter's negative regulation of ER expression is a potential mechanism of TXNIP modulation. CONCLUSIONS Altogether, we propose that regulation of energy metabolism contributes to 1,25(OH)2D3's anti-cancer effects and that combining 1,25(OH)2D3 with drugs targeting metabolic networks in tumor cells may lead to synergistic effects.
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Affiliation(s)
- Mohamed A. Abu el Maaty
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
| | - Yasamin Dabiri
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
| | - Fadi Almouhanna
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
| | - Biljana Blagojevic
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
| | - Jannick Theobald
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
| | - Michael Büttner
- Metabolomics Core Technology Platform, Center for Organismal Studies (COS), Heidelberg University, Im Neuenheimer Feld 360, 69120 Heidelberg, Germany
| | - Stefan Wölfl
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
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De Cesare V, Johnson C, Barlow V, Hastie J, Knebel A, Trost M. The MALDI-TOF E2/E3 Ligase Assay as Universal Tool for Drug Discovery in the Ubiquitin Pathway. Cell Chem Biol 2018; 25:1117-1127.e4. [PMID: 30017913 PMCID: PMC6162346 DOI: 10.1016/j.chembiol.2018.06.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 04/14/2018] [Accepted: 06/08/2018] [Indexed: 12/18/2022]
Abstract
Due to their role in many diseases, enzymes of the ubiquitin system have recently become interesting drug targets. Despite efforts, primary screenings of compound libraries targeting E2 enzymes and E3 ligases have been strongly limited by the lack of robust and fast high-throughput assays. Here we report a label-free high-throughput screening assay for ubiquitin E2 conjugating enzymes and E3 ligases based on MALDI-TOF mass spectrometry. The MALDI-TOF E2/E3 assay allows testing E2 enzymes and E3 ligases for their ubiquitin transfer activity, identifying E2/E3 active pairs, inhibitor potency and specificity and screening compound libraries in vitro without chemical or fluorescent probes. We demonstrate that the MALDI-TOF E2/E3 assay is a universal tool for drug discovery screening in the ubiquitin pathway as it is suitable for working with all E3 ligase families and requires a reduced amount of reagents, compared with standard biochemical assays. We have developed a high-throughput MALDI-TOF assay for E2/E3 enzymes It allows screening compound libraries without chemical or fluorescent probes We tested the screen on three disease-relevant E3 ligases: MDM2, ITCH, and HOIP We performed a proof-of-concept high-throughput screen against 1,430 compounds
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Affiliation(s)
- Virginia De Cesare
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dow St, Dundee DD1 5EH, Scotland, UK.
| | - Clare Johnson
- MRC Protein Phosphorylation and Ubiquitylation Unit Reagents and Services, University of Dundee, Dow St, Dundee DD1 5EH, Scotland, UK
| | - Victoria Barlow
- MRC Protein Phosphorylation and Ubiquitylation Unit Reagents and Services, University of Dundee, Dow St, Dundee DD1 5EH, Scotland, UK
| | - James Hastie
- MRC Protein Phosphorylation and Ubiquitylation Unit Reagents and Services, University of Dundee, Dow St, Dundee DD1 5EH, Scotland, UK
| | - Axel Knebel
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dow St, Dundee DD1 5EH, Scotland, UK
| | - Matthias Trost
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dow St, Dundee DD1 5EH, Scotland, UK; Institute for Cell and Molecular Biosciences, Newcastle University, Framlington Place, Newcastle-upon-Tyne NE2 1HH, UK.
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Jetten AM. GLIS1-3 transcription factors: critical roles in the regulation of multiple physiological processes and diseases. Cell Mol Life Sci 2018; 75:3473-3494. [PMID: 29779043 DOI: 10.1007/s00018-018-2841-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/07/2018] [Accepted: 05/14/2018] [Indexed: 12/12/2022]
Abstract
Krüppel-like zinc finger proteins form one of the largest families of transcription factors. They function as key regulators of embryonic development and a wide range of other physiological processes, and are implicated in a variety of pathologies. GLI-similar 1-3 (GLIS1-3) constitute a subfamily of Krüppel-like zinc finger proteins that act either as activators or repressors of gene transcription. GLIS3 plays a critical role in the regulation of multiple biological processes and is a key regulator of pancreatic β cell generation and maturation, insulin gene expression, thyroid hormone biosynthesis, spermatogenesis, and the maintenance of normal kidney functions. Loss of GLIS3 function in humans and mice leads to the development of several pathologies, including neonatal diabetes and congenital hypothyroidism, polycystic kidney disease, and infertility. Single nucleotide polymorphisms in GLIS3 genes have been associated with increased risk of several diseases, including type 1 and type 2 diabetes, glaucoma, and neurological disorders. GLIS2 plays a critical role in the kidney and GLIS2 dysfunction leads to nephronophthisis, an end-stage, cystic renal disease. In addition, GLIS1-3 have regulatory functions in several stem/progenitor cell populations. GLIS1 and GLIS3 greatly enhance reprogramming efficiency of somatic cells into induced embryonic stem cells, while GLIS2 inhibits reprogramming. Recent studies have obtained substantial mechanistic insights into several physiological processes regulated by GLIS2 and GLIS3, while a little is still known about the physiological functions of GLIS1. The localization of some GLIS proteins to the primary cilium suggests that their activity may be regulated by a downstream primary cilium-associated signaling pathway. Insights into the upstream GLIS signaling pathway may provide opportunities for the development of new therapeutic strategies for diabetes, hypothyroidism, and other diseases.
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Affiliation(s)
- Anton M Jetten
- Cell Biology Group, Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, 27709, USA.
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Ohtake F, Tsuchiya H, Saeki Y, Tanaka K. K63 ubiquitylation triggers proteasomal degradation by seeding branched ubiquitin chains. Proc Natl Acad Sci U S A 2018; 115:E1401-8. [PMID: 29378950 DOI: 10.1073/pnas.1716673115] [Citation(s) in RCA: 166] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Different polyubiquitin chain linkages direct substrates toward distinct cellular pathways. K63-linked ubiquitylation is known to regulate proteasome-independent events such as signal transduction, but its function in the context of heterogeneous ubiquitin chains remains unclear. Here, we report that K63 ubiquitylation plays a critical role in proteasome-mediated substrate degradation by serving as a "seed" for K48/K63 branched ubiquitin chains. Quantitative analysis revealed that K48/K63 branched linkages preferentially associate with proteasomes in cells. We found that ITCH-dependent K63 ubiquitylation of the proapoptotic regulator TXNIP triggered subsequent assembly of K48/K63 branched chains by recruiting ubiquitin-interacting ligases such as UBR5, leading to TXNIP degradation. These results reveal a role for K63 chains as a substrate-specific mark for proteasomal degradation involved in regulating cell fate. Our findings provide insight into how cellular interpretation of the ubiquitin code is altered by combinations of ubiquitin linkages.
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Mentrup HL, Hartman A, Thames EL, Basheer WA, Matesic LE. The ubiquitin ligase ITCH coordinates small intestinal epithelial homeostasis by modulating cell proliferation, differentiation, and migration. Differentiation 2018; 99:51-61. [PMID: 29309986 DOI: 10.1016/j.diff.2017.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/09/2017] [Accepted: 12/13/2017] [Indexed: 12/20/2022]
Abstract
Maintenance of the intestinal mucosa is driven by local signals that coordinate epithelial proliferation, differentiation, and turnover in order to separate antigenic luminal contents from the host's immune system. Breaches in this barrier promote gastrointestinal pathologies ranging from inflammatory bowel disease to cancer. The ubiquitin ligase ITCH is known to regulate immune responses, and loss of function of ITCH has been associated with gastrointestinal inflammatory disorders, particularly in the colon. However, the small intestine appears to be spared from this pathology. Here we explored the physiological mechanism that underlies the preservation of mucosal homeostasis in the small intestine in mice lacking ITCH (Itcha18H/a18H). Histological analysis of the small intestines from young adult mice revealed architectural changes in animals deficient for ITCH, including villus blunting with cell crowding, crypt expansion, and thickening of the muscularis propria relative to age-matched mice sufficient for ITCH. These differences were more prominent in the distal part of the small intestine and were not dependent upon lymphoid cells. Underlying the observed changes in the epithelium were expansion of the Ki67+ proliferating transit amplifying progenitor population and increased numbers of terminally differentiated mucus-secreting goblet and anti-microbial producing Paneth cells, which are both important in controlling local inflammation in the small intestine and are known to be dysregulated in inflammatory bowel disease. Homeostasis in the small intestine of Itcha18H/a18H animals was maintained by increased cell turnover, including accelerated migration of epithelial cells along the crypt-villus axis and increased apoptosis of epithelial cells at the crypt-villus junction. Consistent with this enhanced turnover, Itcha18H/a18H mice carrying the Min mutation (Itcha18H/a18H; ApcMin/+) displayed a 76% reduction in tumor burden as compared to ApcMin/+ littermates with normal levels of ITCH. These findings highlight the role of ITCH as an important modulator of intestinal epithelial homeostasis.
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Perez JM, Chen Y, Xiao TS, Abbott DW. Phosphorylation of the E3 ubiquitin protein ligase ITCH diminishes binding to its cognate E2 ubiquitin ligase. J Biol Chem 2017; 293:1100-1105. [PMID: 29212706 DOI: 10.1074/jbc.ra117.000408] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/21/2017] [Indexed: 12/21/2022] Open
Abstract
Heightened and extended inflammation underlies the pathogenesis of many disorders, including inflammatory bowel disease, sepsis, and inflammatory arthritis. Ubiquitin networks help dictate the strength and duration of inflammatory signaling. In innate immunity, the itchy E3 ubiquitin protein ligase (ITCH)-A20 ubiquitin-editing complex inhibits receptor-interacting Ser/Thr kinase (RIPK) activation by removing Lys-63-linked polyubiquitinated chains from key proteins in the nuclear factor kappa B (NF-κB) signaling pathway. The complex then attaches polyubiquitinated chains to these proteins to target them for lysosomal or proteasomal destruction. ITCH is phosphorylated and thereby inhibited by inhibitor of nuclear factor kappa B kinase subunit beta (IKKβ) to fine-tune the inflammatory response to the strength of the offending signal. However, the biochemical mechanism by which E3 ubiquitination is impaired by IKK-driven phosphorylation remains unclear. Here, we report that this phosphorylation impedes ITCH binding to its cognate E2 ubiquitin ligase, UbcH7. Using CRISPR-Cas9 genetic knockout to mimic the ITCH-UbcH7-inhibited state, we further show that genetic UbcH7 deficiency phenocopies ITCH phosphorylation in regulating RIPK2 ubiquitination. We conclude that phosphorylation can disrupt the binding of an E3 ubiquitin ligase to an E2-conjugating enzyme, leading to prolonged inflammatory signaling. To our knowledge, this is the first report of E3 ubiquitin ligase phosphorylation inhibiting E3 ligase activity by impairing E2-E3 complex formation.
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Affiliation(s)
| | - Yinghua Chen
- Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106
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Wang X, Fang Z, Wang A, Luo C, Cheng X, Lu M. Lithium Suppresses Hedgehog Signaling via Promoting ITCH E3 Ligase Activity and Gli1-SUFU Interaction in PDA Cells. Front Pharmacol 2017; 8:820. [PMID: 29249966 PMCID: PMC5715333 DOI: 10.3389/fphar.2017.00820] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 10/30/2017] [Indexed: 01/02/2023] Open
Abstract
Dysregulation of Hedgehog (Hh) signaling pathway is one of the hallmarks of pancreatic ductal adenocarcinoma (PDA). Lithium, a clinical mood stabilizer for the treatment of mental disorders, is known to suppress tumorigenic potential of PDA cells by targeting the Hh/Gli signaling pathway. In this study, we investigated the molecular mechanism of lithium induced down-regulation of Hh/Gli1. Our data show that lithium promotes the poly-ubiquitination and proteasome-mediated degradation of Gli1 through activating E3 ligase ITCH. Additionally, lithium enhances interaction between Gli1 and SUFU via suppressing GSK3β, which phosphorylates SUFU and destabilizes the SUFU-Gli1 inhibitory complex. Our studies illustrate a novel mechanism by which lithium suppresses Hh signaling via simultaneously promoting ITCH-dependent Gli1 ubiquitination/degradation and SUFU-mediated Gli1 inhibition.
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Affiliation(s)
- Xinshuo Wang
- State Key Laboratory of Natural Medicines, School of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China.,School of Medicine and Life Sciences, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zijian Fang
- State Key Laboratory of Natural Medicines, School of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Anlin Wang
- State Key Laboratory of Natural Medicines, School of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Cheng Luo
- State Key Laboratory of Natural Medicines, School of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
| | - Xiaodong Cheng
- Department of Integrative Biology and Pharmacology, Texas Therapeutics Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Meiling Lu
- State Key Laboratory of Natural Medicines, School of Life Sciences and Technology, China Pharmaceutical University, Nanjing, China
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Liu Y, Peng J, Sun T, Li N, Zhang L, Ren J, Yuan H, Kan S, Pan Q, Li X, Ding Y, Jiang M, Cong X, Tan M, Ma Y, Fu D, Cai S, Xiao Y, Wang X, Qin J. Epithelial EZH2 serves as an epigenetic determinant in experimental colitis by inhibiting TNFα-mediated inflammation and apoptosis. Proc Natl Acad Sci U S A 2017; 114:E3796-805. [PMID: 28439030 DOI: 10.1073/pnas.1700909114] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Epithelial barrier disruption is a major cause of inflammatory bowel disease (IBD); however, the mechanism through which epigenetic regulation modulates intestinal epithelial integrity remains largely undefined. Here we show that EZH2, the catalytic subunit of polycomb repressive complex (PRC2), is indispensable for maintaining epithelial cell barrier integrity and homeostasis under inflammatory conditions. In accordance with reduced EZH2 expression in patients, the inactivation of EZH2 in IECs sensitizes mice to DSS- and TNBS-induced experimental colitis. Conversely, EZH2 overexpression in the intestinal epithelium renders mice more resistant to colitis. Mechanistically, the genes encoding TRAF2/5 are held in a finely tuned bivalent status under inflammatory conditions. EZH2 deficiency potentiates the expression of these genes to enhance TNFα-induced NF-κB signaling, thereby leading to uncontrolled inflammation. More importantly, we show that EZH2 depletion compromises the protective role of NF-κB signaling in cell survival by directly up-regulating ITCH, a well-known E3 ligase that degrades the c-FLIP protein. Thus, our findings highlight an epigenetic mechanism by which EZH2 integrates the multifaceted effects of TNFα signaling to promote the inflammatory response and apoptosis in colitis.
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Kim Y, Kim W, Song Y, Kim JR, Cho K, Moon H, Ro SW, Seo E, Ryu YM, Myung SJ, Jho EH. Deubiquitinase YOD1 potentiates YAP/TAZ activities through enhancing ITCH stability. Proc Natl Acad Sci U S A 2017; 114:4691-6. [PMID: 28416659 DOI: 10.1073/pnas.1620306114] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Hippo signaling controls the expression of genes regulating cell proliferation and survival and organ size. The regulation of core components in the Hippo pathway by phosphorylation has been extensively investigated, but the roles of ubiquitination-deubiquitination processes are largely unknown. To identify deubiquitinase(s) that regulates Hippo signaling, we performed unbiased siRNA screening and found that YOD1 controls biological responses mediated by YAP/TAZ. Mechanistically, YOD1 deubiquitinates ITCH, an E3 ligase of LATS, and enhances the stability of ITCH, which leads to reduced levels of LATS and a subsequent increase in the YAP/TAZ level. Furthermore, we show that the miR-21-mediated regulation of YOD1 is responsible for the cell-density-dependent changes in YAP/TAZ levels. Using a transgenic mouse model, we demonstrate that the inducible expression of YOD1 enhances the proliferation of hepatocytes and leads to hepatomegaly in a YAP/TAZ-activity-dependent manner. Moreover, we find a strong correlation between YOD1 and YAP expression in liver cancer patients. Overall, our data strongly suggest that YOD1 is a regulator of the Hippo pathway and would be a therapeutic target to treat liver cancer.
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Gen Y, Yasui K, Kitaichi T, Iwai N, Terasaki K, Dohi O, Hashimoto H, Fukui H, Inada Y, Fukui A, Jo M, Moriguchi M, Nishikawa T, Umemura A, Yamaguchi K, Konishi H, Naito Y, Itoh Y. ASPP2 suppresses invasion and TGF-β1-induced epithelial-mesenchymal transition by inhibiting Smad7 degradation mediated by E3 ubiquitin ligase ITCH in gastric cancer. Cancer Lett 2017; 398:52-61. [PMID: 28400336 DOI: 10.1016/j.canlet.2017.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 03/21/2017] [Accepted: 04/02/2017] [Indexed: 12/12/2022]
Abstract
ASPP2 regulates cell polarity and cell-cell adhesion by binding to, and co-localizing with PAR3 at tight junctions. Here we show a novel role of ASPP2 in suppressing gastric cancer (GC) invasiveness. Immunoprecipitation and immunofluorescence analyses showed that ASPP2 promoted the recruitment of PAR3 to cell-cell junctions in GC cells. Diminished expression of ASPP2 and loss of junctional PAR3 localization were significantly associated with diffuse-type histology, deeper invasion depth, positive peritoneal dissemination and worse prognosis in primary GC. ASPP2 suppressed migration and invasion of GC cells in vitro and peritoneal dissemination of GC cells in vivo in a mouse model. ASPP2 suppressed epithelial-mesenchymal transition (EMT) induced by TGF-β1-Smad2/3 signaling in GC cells through suppression of the degradation of Smad7, a negative regulator of TGF-β1-Smad2/3 signaling, by interacting with the E3 ubiquitin ligase ITCH. In conclusion, ASPP2 suppresses invasion, peritoneal dissemination and TGF-β1-induced EMT by inhibiting Smad7 degradation mediated by ITCH.
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Affiliation(s)
- Yasuyuki Gen
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan; Department of Molecular Cytogenetics, Medical Research Institute and Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kohichiroh Yasui
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | - Tomoko Kitaichi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Naoto Iwai
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kei Terasaki
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Osamu Dohi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hikaru Hashimoto
- Department of Gastroenterology and Hepatology, North Medical Center Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hayato Fukui
- Department of Gastroenterology and Hepatology, North Medical Center Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yutaka Inada
- Department of Gastroenterology and Hepatology, North Medical Center Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Akifumi Fukui
- Department of Gastroenterology and Hepatology, North Medical Center Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masayasu Jo
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Michihisa Moriguchi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Taichiro Nishikawa
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Atushi Umemura
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kanji Yamaguchi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroyuki Konishi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuji Naito
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshito Itoh
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Luo ZL, Luo HJ, Fang C, Cheng L, Huang Z, Dai R, Li K, Tian FZ, Wang T, Tang LJ. Negative correlation of ITCH E3 ubiquitin ligase and miRNA-106b dictates metastatic progression in pancreatic cancer. Oncotarget 2016; 7:1477-85. [PMID: 26621835 PMCID: PMC4811474 DOI: 10.18632/oncotarget.6395] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 11/14/2015] [Indexed: 01/05/2023] Open
Abstract
Pancreatic cancer is one of the major malignancies and cause for mortality across the world, with recurrence and metastatic progression remaining the single largest cause of pancreatic cancer mortality. Hence it is imperative to develop novel biomarkers of pancreatic cancer prognosis. The E3 ubiquitin ligase ITCH has been previously reported to inhibit the tumor suppressive Hippo signaling by suppressing LATS1/2 in breast cancer and chronic lymphocytic leukemia. However, the role of ITCH in pancreatic cancer progression has not been described. Here we report that ITCH transcript and protein expression mimic metastatic trait in pancreatic cancer patients and cell lines. Loss-of-function studies of ITCH showed that the gene product is responsible for inducing metastasis in vivo. We furthermore show that hsa-miR-106b, which itself is down regulated in metastatic pancreatic cancer, directly interacts and inhibit ITCH expression. ITCH and hsa-miR-106b are thus potential biomarkers for pancreatic cancer prognosis.
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Affiliation(s)
- Zhu-Lin Luo
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Hui-Jun Luo
- Department of Biochemistry and Molecular Biology, Mayo Clinic Arizona, Scottsdale, AZ 85259, USA
| | - Chen Fang
- Chengdu Military Institute for Drug and Instrument Control, Chengdu, Sichuan 610020, P. R. China
| | - Long Cheng
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Zhu Huang
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Ruiwu Dai
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Kun Li
- Medical Central Laboratory, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Fu-Zhou Tian
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Tao Wang
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
| | - Li-Jun Tang
- Department of General Surgery, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P. R. China
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Abu-Odeh M, Hereema NA, Aqeilan RI. WWOX modulates the ATR-mediated DNA damage checkpoint response. Oncotarget 2016; 7:4344-55. [PMID: 26675548 DOI: 10.18632/oncotarget.6571] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 11/25/2015] [Indexed: 11/25/2022] Open
Abstract
For many decades genomic instability is considered one of the hallmarks of cancer. Role of the tumor suppressor WWOX (WW domain-containing oxidoreductase) in DNA damage response upon double strand breaks has been recently revealed. Here we demonstrate unforeseen functions for WWOX upon DNA single strand breaks (SSBs) checkpoint activation. We found that WWOX levels are induced following SSBs and accumulate in the nucleus. WWOX deficiency is associated with reduced activation of ataxia telangiectasia and Rad3-related protein (ATR) checkpoint proteins and increased chromosomal breaks. At the molecular level, we show that upon SSBs WWOX is modified at lysine 274 by ubiquitination mediated by the ubiquitin E3 ligase ITCH and interacts with ataxia telangiectasia-mutated (ATM). Interestingly, ATM inhibition was associated with reduced activation of ATR checkpoint proteins suggesting that WWOX manipulation of ATR checkpoint proteins is ATM-dependent. Taken together, the present findings indicate that WWOX plays a key role in ATR checkpoint activation, while its absence might facilitate genomic instability.
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Otaki Y, Takahashi H, Watanabe T, Funayama A, Netsu S, Honda Y, Narumi T, Kadowaki S, Hasegawa H, Honda S, Arimoto T, Shishido T, Miyamoto T, Kamata H, Nakajima O, Kubota I. HECT-Type Ubiquitin E3 Ligase ITCH Interacts With Thioredoxin-Interacting Protein and Ameliorates Reactive Oxygen Species-Induced Cardiotoxicity. J Am Heart Assoc 2016; 5:JAHA.115.002485. [PMID: 26796253 PMCID: PMC4859366 DOI: 10.1161/jaha.115.002485] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background The homologous to the E6‐AP carboxyl terminus (HECT)–type ubiquitin E3 ligase ITCH is an enzyme that plays a pivotal role in posttranslational modification by ubiquitin proteasomal protein degradation. Thioredoxin‐interacting protein (TXNIP) is a negative regulator of the thioredoxin system and an endogenous reactive oxygen species scavenger. In the present study, we focused on the functional role of ubiquitin E3 ligase ITCH and its interaction with TXNIP to elucidate the mechanism of cardiotoxicity induced by reactive oxygen species, such as doxorubicin and hydrogen peroxide. Methods and Results Protein interaction between TXNIP and ITCH in cardiomyocyte was confirmed by immunoprecipitation assays. Overexpression of ITCH increased proteasomal TXNIP degradation and augmented thioredoxin activity, leading to inhibition of reactive oxygen species generation, p38 MAPK, p53, and subsequent intrinsic pathway cardiomyocyte apoptosis in reactive oxygen species–induced cardiotoxicity. Conversely, knockdown of ITCH using small interfering RNA inhibited TXNIP degradation and resulted in a subsequent increase in cardiomyocyte apoptosis. Next, we generated a transgenic mouse with cardiac‐specific overexpression of ITCH, called the ITCH‐Tg mouse. The expression level of TXNIP in the myocardium in ITCH‐Tg mice was significantly lower than WT littermates. In ITCH‐Tg mice, cardiac dysfunction and remodeling were restored compared with WT littermates after doxorubicin injection and myocardial infarction surgery. Kaplan–Meier analysis revealed that ITCH‐Tg mice had a higher survival rate than WT littermates after doxorubicin injection and myocardial infarction surgery. Conclusion We demonstrated, for the first time, that ITCH targets TXNIP for ubiquitin‐proteasome degradation in cardiomyocytes and ameliorates reactive oxygen species–induced cardiotoxicity through the thioredoxin system.
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Affiliation(s)
- Yoichiro Otaki
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Hiroki Takahashi
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Tetsu Watanabe
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Akira Funayama
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Shunsuke Netsu
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Yuki Honda
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Taro Narumi
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Shinpei Kadowaki
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Hiromasa Hasegawa
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Shintaro Honda
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Takanori Arimoto
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Tetsuro Shishido
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Takuya Miyamoto
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
| | - Hideaki Kamata
- Laboratory of Biomedical Chemistry, Department of Molecular Medical Science, Graduate School of Medicine, University of Hiroshima, Japan (H.K.)
| | - Osamu Nakajima
- Research Laboratory for Molecular Genetics, Yamagata University School of Medicine, Yamagata, Japan (O.N.)
| | - Isao Kubota
- Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, Yamagata, Japan (Y.O., H.T., T.W., A.F., S.N., Y.H., T.N., S.K., H.H., S.H., T.A., T.S., T.M., I.K.)
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Affiliation(s)
- Gerry Melino
- Department of Experimental Medicine and Surgery, University of Rome "Tor Vergata", 00133 Rome, Italy
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Upadhyay A, Amanullah A, Chhangani D, Mishra R, Mishra A. Selective multifaceted E3 ubiquitin ligases barricade extreme defense: Potential therapeutic targets for neurodegeneration and ageing. Ageing Res Rev 2015; 24:138-59. [PMID: 26247845 DOI: 10.1016/j.arr.2015.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 06/24/2015] [Accepted: 07/30/2015] [Indexed: 12/24/2022]
Abstract
Efficient and regular performance of Ubiquitin Proteasome System and Autophagy continuously eliminate deleterious accumulation of nonnative protiens. In cellular quality control system, E3 ubiquitin ligases are significant employees for defense mechanism against abnormal toxic proteins. Few findings indicate that lack of functions of E3 ubiquitin ligases can be a causative factor of neurodevelopmental disorders, neurodegeneration, cancer and ageing. However, the detailed molecular pathomechanism implying E3 ubiquitin ligases in cellular functions in multifactorial disease conditions are not well understood. This article systematically represents the unique characteristics, molecular nature, and recent developments in the knowledge of neurobiological functions of few crucial E3 ubiquitin ligases. Here, we review recent literature on the roles of E6-AP, HRD1 and ITCH E3 ubiquitin ligases in the neuro-pathobiological mechanisms, with precise focus on the processes of neurodegeneration, and thereby propose new lines of potential targets for therapeutic interventions.
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Xia K, Zhang Y, Cao S, Wu Y, Guo W, Yuan W, Zhang S. miR-411 regulated ITCH expression and promoted cell proliferation in human hepatocellular carcinoma cells. Biomed Pharmacother 2015; 70:158-63. [PMID: 25776495 DOI: 10.1016/j.biopha.2015.01.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 01/04/2015] [Indexed: 01/20/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common human malignancies and the third most common cause of cancer mortality in the world. In this study, we report that miR-411 expression is markedly upregulated in HCC cells and HCC tissues compared with normal control tissues and cells. Previous studies have shown that miR-411 plays a crucial role in a variety of biological processes in various human cancer cells. However, the specific function of miR-411 in HCC remains unclear. Ectopic expression of miR-411 promoted the proliferation and anchorage-independent growth of HCC cells, whereas inhibition of miR-411 reduced this effect. Bioinformatics analysis further revealed ITCH, a putative tumor suppressor as a potential target of miR-411. Data from luciferase reporter assays showed that miR-411 directly binds to the 3'-untranslated region (3'-UTR) of ITCH mRNA and repressed expression at both transcriptional and translational levels. In functional assays, miR-411 promoted HCC cell proliferation, which could be suppressed by miR-411-in. Taken together, our data provide convincing evidence that miR-411 functions as an onco-miRNA, which was associated with cell proliferation of HCC, and its oncogenic effect is mediated chiefly through direct suppression of ITCH expression.
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Affiliation(s)
- Kunkun Xia
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China; Key Laboratory of Hepatobiliary and Pancreatic Surgery & Digestive Organ Transplantation of Henan Province, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China
| | - Yi Zhang
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China
| | - Shengli Cao
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China; Key Laboratory of Hepatobiliary and Pancreatic Surgery & Digestive Organ Transplantation of Henan Province, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China
| | - Yang Wu
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China
| | - Wenzhi Guo
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China
| | - Weitang Yuan
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China
| | - Shuijun Zhang
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China; Key Laboratory of Hepatobiliary and Pancreatic Surgery & Digestive Organ Transplantation of Henan Province, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, People's Republic of China.
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Abu-Odeh M, Salah Z, Herbel C, Hofmann TG, Aqeilan RI. WWOX, the common fragile site FRA16D gene product, regulates ATM activation and the DNA damage response. Proc Natl Acad Sci U S A 2014; 111:E4716-25. [PMID: 25331887 DOI: 10.1073/pnas.1409252111] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Genomic instability is a hallmark of cancer. The WW domain-containing oxidoreductase (WWOX) is a tumor suppressor spanning the common chromosomal fragile site FRA16D. Here, we report a direct role of WWOX in DNA damage response (DDR) and DNA repair. We show that Wwox deficiency results in reduced activation of the ataxia telangiectasia-mutated (ATM) checkpoint kinase, inefficient induction and maintenance of γ-H2AX foci, and impaired DNA repair. Mechanistically, we show that, upon DNA damage, WWOX accumulates in the cell nucleus, where it interacts with ATM and enhances its activation. Nuclear accumulation of WWOX is regulated by its K63-linked ubiquitination at lysine residue 274, which is mediated by the E3 ubiquitin ligase ITCH. These findings identify a novel role for the tumor suppressor WWOX and show that loss of WWOX expression may drive genomic instability and provide an advantage for clonal expansion of neoplastic cells.
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de la Fuente M, Jones MC, Santander-Ortega MJ, Mirenska A, Marimuthu P, Uchegbu I, Schätzlein A. A nano-enabled cancer-specific ITCH RNAi chemotherapy booster for pancreatic cancer. Nanomedicine 2014; 11:369-77. [PMID: 25267700 DOI: 10.1016/j.nano.2014.09.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 09/01/2014] [Accepted: 09/18/2014] [Indexed: 02/06/2023]
Abstract
UNLABELLED Gemcitabine is currently the standard therapy for pancreatic cancer. However, growing concerns over gemcitabine resistance mean that new combinatory therapies are required to prevent loss of efficacy with prolonged treatment. Here, we suggest that this could be achieved through co-administration of RNA interference agents targeting the ubiquitin ligase ITCH. Stable anti-ITCH siRNA and shRNA dendriplexes with a desirable safety profile were prepared using generation 3 poly(propylenimine) dendrimers (DAB-Am16). The complexes were efficiently taken up by human pancreatic cancer cells and produced a 40-60% decrease in ITCH RNA and protein expression in vitro (si/shRNA) and in a xenograft model of pancreatic cancer (shRNA). When co-administered with gemcitabine (100 mg/kg/week) at a subtherapeutic dose, treatment with ITCH-shRNA (3x 50 mg/week) was able to fully suppress tumour growth for 17 days, suggesting that downregulation of ITCH mediated by DAB-Am16/shRNA sensitizes pancreatic cancer to gemcitabine in an efficient and specific manner. FROM THE CLINICAL EDITOR Gemcitabine delivery to pancreatic cancer often results in the common problem of drug resistance. This team overcame the problem through co-administration of siRNA and shRNA dendriplexes targeting the ubiquitin ligase ITCH.
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Affiliation(s)
| | | | | | - Anja Mirenska
- UCL School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX
| | | | - Ijeoma Uchegbu
- UCL School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX
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