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Dai N, Groenendyk J, Michalak M. Interplay between myotubularins and Ca 2+ homeostasis. Biochim Biophys Acta Mol Cell Res 2024; 1871:119739. [PMID: 38710289 DOI: 10.1016/j.bbamcr.2024.119739] [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] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/08/2024]
Abstract
The myotubularin family, encompassing myotubularin 1 (MTM1) and 14 myotubularin-related proteins (MTMRs), represents a conserved group of phosphatases featuring a protein tyrosine phosphatase domain. Nine members are characterized by an active phosphatase domain C(X)5R, dephosphorylating the D3 position of PtdIns(3)P and PtdIns(3,5)P2. Mutations in myotubularin genes result in human myopathies, and several neuropathies including X-linked myotubular myopathy and Charcot-Marie-Tooth type 4B. MTM1, MTMR6 and MTMR14 also contribute to Ca2+ signaling and Ca2+ homeostasis that play a key role in many MTM-dependent myopathies and neuropathies. Here we explore the evolving roles of MTM1/MTMRs, unveiling their influence on critical aspects of Ca2+ signaling pathways.
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Affiliation(s)
- Ning Dai
- Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada
| | - Jody Groenendyk
- Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada
| | - Marek Michalak
- Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada.
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2
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Weidner P, Saar D, Söhn M, Schroeder T, Yu Y, Zöllner FG, Ponelies N, Zhou X, Zwicky A, Rohrbacher FN, Pattabiraman VR, Tanriver M, Bauer A, Ahmed H, Ametamey SM, Riffel P, Seger R, Bode JW, Wade RC, Ebert MPA, Kragelund BB, Burgermeister E. Myotubularin-related-protein-7 inhibits mutant (G12V) K-RAS by direct interaction. Cancer Lett 2024; 588:216783. [PMID: 38462034 DOI: 10.1016/j.canlet.2024.216783] [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: 12/04/2023] [Revised: 02/19/2024] [Accepted: 03/03/2024] [Indexed: 03/12/2024]
Abstract
Inhibition of K-RAS effectors like B-RAF or MEK1/2 is accompanied by treatment resistance in cancer patients via re-activation of PI3K and Wnt signaling. We hypothesized that myotubularin-related-protein-7 (MTMR7), which inhibits PI3K and ERK1/2 signaling downstream of RAS, directly targets RAS and thereby prevents resistance. Using cell and structural biology combined with animal studies, we show that MTMR7 binds and inhibits RAS at cellular membranes. Overexpression of MTMR7 reduced RAS GTPase activities and protein levels, ERK1/2 phosphorylation, c-FOS transcription and cancer cell proliferation in vitro. We located the RAS-inhibitory activity of MTMR7 to its charged coiled coil (CC) region and demonstrate direct interaction with the gastrointestinal cancer-relevant K-RASG12V mutant, favouring its GDP-bound state. In mouse models of gastric and intestinal cancer, a cell-permeable MTMR7-CC mimicry peptide decreased tumour growth, Ki67 proliferation index and ERK1/2 nuclear positivity. Thus, MTMR7 mimicry peptide(s) could provide a novel strategy for targeting mutant K-RAS in cancers.
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Affiliation(s)
- Philip Weidner
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Daniel Saar
- Structural Biology and NMR Laboratory (SBiNLab) and the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Michaela Söhn
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Torsten Schroeder
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Yanxiong Yu
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Frank G Zöllner
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Mannheim Institute for Intelligent Systems in Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Cooperative Core Facility Animal Scanner ZI, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Norbert Ponelies
- Orthopaedics & Trauma Surgery, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Xiaobo Zhou
- Department of Medicine I, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - André Zwicky
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Bioscience of ETH, Zurich, Switzerland
| | - Florian N Rohrbacher
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Bioscience of ETH, Zurich, Switzerland
| | - Vijaya R Pattabiraman
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Bioscience of ETH, Zurich, Switzerland
| | - Matthias Tanriver
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Bioscience of ETH, Zurich, Switzerland
| | - Alexander Bauer
- Structural Biology and NMR Laboratory (SBiNLab) and the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Hazem Ahmed
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences of ETH, Zurich, Switzerland
| | - Simon M Ametamey
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences of ETH, Zurich, Switzerland
| | - Philipp Riffel
- Clinic of Radiology and Nuclear Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Rony Seger
- Department of Immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Jeffrey W Bode
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Bioscience of ETH, Zurich, Switzerland
| | - Rebecca C Wade
- Heidelberg Institute for Theoretical Studies (HITS), Heidelberg, Germany; Heidelberg University, Zentrum für Molekulare Biologie (ZMBH), DKFZ-ZMBH Alliance, and Interdisciplinary Center for Scientific Computing (IWR), Heidelberg, Germany
| | - Matthias P A Ebert
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; DKFZ-Hector Institute at the University Medical Center, Mannheim, Germany
| | - Birthe B Kragelund
- Structural Biology and NMR Laboratory (SBiNLab) and the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark.
| | - Elke Burgermeister
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
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3
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Wang J, Guo W, Wang Q, Yang Y, Sun X. Recent advances of myotubularin-related (MTMR) protein family in cardiovascular diseases. Front Cardiovasc Med 2024; 11:1364604. [PMID: 38529329 PMCID: PMC10961392 DOI: 10.3389/fcvm.2024.1364604] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 02/27/2024] [Indexed: 03/27/2024] Open
Abstract
Belonging to a lipid phosphatase family containing 16 members, myotubularin-related proteins (MTMRs) are widely expressed in a variety of tissues and organs. MTMRs preferentially hydrolyzes phosphatidylinositol 3-monophosphate and phosphatidylinositol (3,5) bis-phosphate to generate phosphatidylinositol and phosphatidylinositol 5-monophosphate, respectively. These phosphoinositides (PIPs) promote membrane degradation during autophagosome-lysosomal fusion and are also involved in various regulatory signal transduction. Based on the ability of modulating the levels of these PIPs, MTMRs exert physiological functions such as vesicle trafficking, cell proliferation, differentiation, necrosis, cytoskeleton, and cell migration. It has recently been found that MTMRs are also involved in the occurrence and development of several cardiovascular diseases, including cardiomyocyte hypertrophy, proliferation of vascular smooth muscle cell, LQT1, aortic aneurysm, etc. This review summarizes the functions of MTMRs and highlights their pathophysiological roles in cardiovascular diseases.
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Affiliation(s)
- Jia Wang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
- College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, China
| | - Wei Guo
- Clinical Research Center, Stomatological Hospital of Chongqing Medical University, Chongqing, China
| | - Qiang Wang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
- College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, China
| | - Yongjian Yang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Xiongshan Sun
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
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Sun X, Yang Y, Zhao W, Wang M, Chen Y, Wang J, Yang D, Yang Y. MTMR7 suppresses the phenotypic switching of vascular smooth muscle cell and vascular intimal hyperplasia after injury via regulating p62/mTORC1-mediated glucose metabolism. Atherosclerosis 2024; 390:117470. [PMID: 38342025 DOI: 10.1016/j.atherosclerosis.2024.117470] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 12/24/2023] [Accepted: 01/30/2024] [Indexed: 02/13/2024]
Abstract
BACKGROUND AND AIMS Myotubularin-related protein 7 (MTMR7) suppresses proliferation in various cell types and is associated with cardiovascular and cerebrovascular diseases. However, whether MTMR7 regulates vascular smooth muscle cell (VSMC) and vascular intimal hyperplasia remains unclear. We explored the role of MTMR7 in phenotypic switching of VSMC and vascular intimal hyperplasia after injury. METHODS AND RESULTS MTMR7 expression was significantly downregulated in injured arteries. Compared to wild type (WT) mice, Mtmr7-transgenic (Mtmr7-Tg) mice showed reduced intima/media ratio, decreased percentage of Ki-67-positive cells within neointima, and increased Calponin expression in injured artery. In vitro, upregulating MTMR7 by Len-Mtmr7 transfection inhibited platelet derived growth factor (PDGF)-BB-induced proliferation, migration of VSMC and reversed PDGF-BB-induced decrease in expression of Calponin and SM-MHC. Microarray, single cell sequence, and other bioinformatics analysis revealed that MTMR7 is highly related to glucose metabolism and mammalian target of rapamycin complex 1 (mTORC1). Further experiments confirmed that MTMR7 markedly repressed glycolysis and mTORC1 activity in PDGF-BB-challenged VSMC in vitro. Restoring mTORC1 activity abolished MTMR7-mediated suppression of glycolysis, phenotypic shift in VSMC in vitro and protection against vascular intimal hyperplasia in vivo. Furthermore, upregulating MTMR7 in vitro led to dephosphorylation and dissociation of p62 from mTORC1 in VSMC. External expression of p62 in vitro also abrogated the inhibitory effects of MTMR7 on glycolysis and phenotypic switching in PDGF-BB-stimulated VSMC. CONCLUSIONS Our study demonstrates that MTMR7 inhibits injury-induced vascular intimal hyperplasia and phenotypic switching of VSMC. Mechanistically, the beneficial effects of MTMR7 are conducted via suppressing p62/mTORC1-mediated glycolysis.
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Affiliation(s)
- Xiongshan Sun
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Yao Yang
- From the Department of Pharmacy, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Weiwei Zhao
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Mingliang Wang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Yingmei Chen
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Jia Wang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Dachun Yang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China.
| | - Yongjian Yang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, China.
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Derkaczew M, Martyniuk P, Hofman R, Rutkowski K, Osowski A, Wojtkiewicz J. The Genetic Background of Abnormalities in Metabolic Pathways of Phosphoinositides and Their Linkage with the Myotubular Myopathies, Neurodegenerative Disorders, and Carcinogenesis. Biomolecules 2023; 13:1550. [PMID: 37892232 PMCID: PMC10605126 DOI: 10.3390/biom13101550] [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: 08/27/2023] [Revised: 09/16/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
Myo-inositol belongs to one of the sugar alcohol groups known as cyclitols. Phosphatidylinositols are one of the derivatives of Myo-inositol, and constitute important mediators in many intracellular processes such as cell growth, cell differentiation, receptor recycling, cytoskeletal organization, and membrane fusion. They also have even more functions that are essential for cell survival. Mutations in genes encoding phosphatidylinositols and their derivatives can lead to many disorders. This review aims to perform an in-depth analysis of these connections. Many authors emphasize the significant influence of phosphatidylinositols and phosphatidylinositols' phosphates in the pathogenesis of myotubular myopathies, neurodegenerative disorders, carcinogenesis, and other less frequently observed diseases. In our review, we have focused on three of the most often mentioned groups of disorders. Inositols are the topic of many studies, and yet, there are no clear results of successful clinical trials. Analysis of the available literature gives promising results and shows that further research is still needed.
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Affiliation(s)
- Maria Derkaczew
- Department of Human Physiology and Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland
- Students’ Scientific Club of Pathophysiologists, Department of Human Physiology and Pathophysiology, School of Medicine, University of Warmia and Mazury, 10-082 Olsztyn, Poland
| | - Piotr Martyniuk
- Department of Human Physiology and Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland
- Students’ Scientific Club of Pathophysiologists, Department of Human Physiology and Pathophysiology, School of Medicine, University of Warmia and Mazury, 10-082 Olsztyn, Poland
| | - Robert Hofman
- Department of Human Physiology and Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland
- Students’ Scientific Club of Pathophysiologists, Department of Human Physiology and Pathophysiology, School of Medicine, University of Warmia and Mazury, 10-082 Olsztyn, Poland
| | - Krzysztof Rutkowski
- Students’ Scientific Club of Pathophysiologists, Department of Human Physiology and Pathophysiology, School of Medicine, University of Warmia and Mazury, 10-082 Olsztyn, Poland
- The Nicolaus Copernicus Municipal Polyclinical Hospital in Olsztyn, 10-045 Olsztyn, Poland
| | - Adam Osowski
- Department of Human Physiology and Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland
| | - Joanna Wojtkiewicz
- Department of Human Physiology and Pathophysiology, School of Medicine, Collegium Medicum, University of Warmia and Mazury, 10-082 Olsztyn, Poland
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Barradas M, Plaza A, Colmenarejo G, Lázaro I, Costa-Machado LF, Martín-Hernández R, Micó V, López-Aceituno JL, Herranz J, Pantoja C, Tejero H, Diaz-Ruiz A, Al-Shahrour F, Daimiel L, Loria-Kohen V, de Molina AR, Efeyan A, Serrano M, Pozo OJ, Sala-Vila A, Fernandez-Marcos PJ. Fatty acids homeostasis during fasting predicts protection from chemotherapy toxicity. Nat Commun 2022; 13:5677. [PMID: 36167809 PMCID: PMC9515185 DOI: 10.1038/s41467-022-33352-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 09/09/2022] [Indexed: 12/27/2022] Open
Abstract
Fasting exerts beneficial effects in mice and humans, including protection from chemotherapy toxicity. To explore the involved mechanisms, we collect blood from humans and mice before and after 36 or 24 hours of fasting, respectively, and measure lipid composition of erythrocyte membranes, circulating micro RNAs (miRNAs), and RNA expression at peripheral blood mononuclear cells (PBMCs). Fasting coordinately affects the proportion of polyunsaturated versus saturated and monounsaturated fatty acids at the erythrocyte membrane; and reduces the expression of insulin signaling-related genes in PBMCs. When fasted for 24 hours before and 24 hours after administration of oxaliplatin or doxorubicin, mice show a strong protection from toxicity in several tissues. Erythrocyte membrane lipids and PBMC gene expression define two separate groups of individuals that accurately predict a differential protection from chemotherapy toxicity, with important clinical implications. Our results reveal a mechanism of fasting associated with lipid homeostasis, and provide biomarkers of fasting to predict fasting-mediated protection from chemotherapy toxicity. Fasting has been reported to protect from chemotherapy-associated toxicity. Here, the authors show that fatty acid profiles in erythrocyte membranes and gene expression from peripheral blood mononuclear cells are associated to the fasting-mediated benefits during cancer treatment in mice and patients.
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Affiliation(s)
- Marta Barradas
- Metabolic Syndrome Group-BIOPROMET, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain.
| | - Adrián Plaza
- Metabolic Syndrome Group-BIOPROMET, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain.
| | - Gonzalo Colmenarejo
- Biostatistics and Bioinformatics Unit, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Iolanda Lázaro
- Cardiovascular risk and nutrition, Hospital del Mar Medical Research Institute-IMIM, Barcelona, Spain
| | - Luis Filipe Costa-Machado
- Metabolic Syndrome Group-BIOPROMET, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Roberto Martín-Hernández
- Biostatistics and Bioinformatics Unit, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Victor Micó
- Nutritional Genomics of Cardiovascular Disease and Obesity, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - José Luis López-Aceituno
- Metabolic Syndrome Group-BIOPROMET, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Jesús Herranz
- Biostatistics and Bioinformatics Unit, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Cristina Pantoja
- Metabolic Syndrome Group-BIOPROMET, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Hector Tejero
- Bioinformatics Unit, Spanish National Cancer Research Centre-CNIO, Madrid, Spain
| | - Alberto Diaz-Ruiz
- Nutritional Interventions Group, Precision Nutrition and Aging, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Fatima Al-Shahrour
- Bioinformatics Unit, Spanish National Cancer Research Centre-CNIO, Madrid, Spain
| | - Lidia Daimiel
- Nutritional Genomics of Cardiovascular Disease and Obesity, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Viviana Loria-Kohen
- Nutrition and Clinical Trials Unit, Platform GENYAL, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Ana Ramirez de Molina
- Nutrition and Clinical Trials Unit, Platform GENYAL, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain.,Molecular Oncology and Nutritional Genomics of Cancer Group, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain
| | - Alejo Efeyan
- Metabolism and Cell Signaling Group, Spanish National Cancer Research Centre-CNIO, Madrid, Spain
| | - Manuel Serrano
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST), Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| | - Oscar J Pozo
- Applied Metabolomics Research Group, Hospital del Mar Medical Research Institute-(IMIM), Barcelona, Spain
| | - Aleix Sala-Vila
- Cardiovascular risk and nutrition, Hospital del Mar Medical Research Institute-IMIM, Barcelona, Spain.,Fatty Acid Research Institute, Sioux Falls, SD, USA
| | - Pablo J Fernandez-Marcos
- Metabolic Syndrome Group-BIOPROMET, CEI UAM+CSIC, Madrid Institute for Advanced Studies-IMDEA Food, Madrid, Spain.
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Zufferey M, Liu Y, Tavernari D, Mina M, Ciriello G. Systematic assessment of gene co-regulation within chromatin domains determines differentially active domains across human cancers. Genome Biol 2021; 22:218. [PMID: 34344431 PMCID: PMC8330107 DOI: 10.1186/s13059-021-02436-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 07/15/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Spatial interactions and insulation of chromatin regions are associated with transcriptional regulation. Domains of frequent chromatin contacts are proposed as functional units, favoring and delimiting gene regulatory interactions. However, contrasting evidence supports the association between chromatin domains and transcription. RESULT Here, we assess gene co-regulation in chromatin domains across multiple human cancers, which exhibit great transcriptional heterogeneity. Across all datasets, gene co-regulation is observed only within a small yet significant number of chromatin domains. We design an algorithmic approach to identify differentially active domains (DADo) between two conditions and show that these provide complementary information to differentially expressed genes. Domains comprising co-regulated genes are enriched in the less active B sub-compartments and for genes with similar function. Notably, differential activation of chromatin domains is not associated with major changes of domain boundaries, but rather with changes of sub-compartments and intra-domain contacts. CONCLUSION Overall, gene co-regulation is observed only in a minority of chromatin domains, whose systematic identification will help unravel the relationship between chromatin structure and transcription.
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Affiliation(s)
- Marie Zufferey
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Yuanlong Liu
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Daniele Tavernari
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Marco Mina
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Giovanni Ciriello
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland.
- Swiss Cancer Center Leman, Lausanne, Switzerland.
- Swiss Institute of Bioinformatics, Lausanne, Switzerland.
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Zhao X, Cao D, Ren Z, Liu Z, Lv S, Zhu J, Li L, Lang R, He Q. Dipeptidyl peptidase like 6 promoter methylation is a potential prognostic biomarker for pancreatic ductal adenocarcinoma. Biosci Rep 2020; 40:BSR20200214. [PMID: 32701143 DOI: 10.1042/BSR20200214] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 01/31/2020] [Revised: 07/07/2020] [Accepted: 07/21/2020] [Indexed: 12/17/2022] Open
Abstract
Background: Hypermethylation of gene promoters plays an important role in tumorigenesis. The present study aimed to identify and validate promoter methylation-driven genes (PMDGs) for pancreatic ductal adenocarcinoma (PDAC). Methods: Based on GSE49149 and the PDAC cohort of The Cancer Genome Atlas (TCGA), differential analyses of promoter methylation, correlation analysis, and Cox regression analysis were performed to identify PMDGs. The promoter methylation level was assessed by bisulfite sequencing polymerase chain reaction (BSP) in paired tumor and normal tissues of 72 PDAC patients. Kaplan−Meier survival analyses were performed to evaluate the clinical value of PMDGs. Results: In GSE49149, the β-value of the dipeptidyl peptidase like 6 (DPP6) promoter was significantly higher in tumor compared with normal samples (0.50 vs. 0.24, P<0.001). In the PDAC cohort of TCGA, the methylation level of the DPP6 promoter was negatively correlated with mRNA expression (r = −0.54, P<0.001). In a multivariate Cox regression analysis, hypermethylation of the DPP6 promoter was an independent risk factor for PDAC (hazard ratio (HR) = 543.91, P=0.002). The results of BSP revealed that the number of methylated CG sites in the DPP6 promoter was greater in tumor samples than in normal samples (7.43 vs. 2.78, P<0.001). The methylation level of the DPP6 promoter was moderately effective at distinguishing tumor from normal samples (area under ROC curve (AUC) = 0.74, P<0.001). Hypermethylation of the DPP6 promoter was associated with poor overall (HR = 3.61, P<0.001) and disease-free (HR = 2.01, P=0.016) survivals for PDAC patients. Conclusion: These results indicate that DPP6 promoter methylation is a potential prognostic biomarker for PDAC.
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9
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Allen EA, Amato C, Fortier TM, Velentzas P, Wood W, Baehrecke EH. A conserved myotubularin-related phosphatase regulates autophagy by maintaining autophagic flux. J Cell Biol 2021; 219:152081. [PMID: 32915229 PMCID: PMC7594499 DOI: 10.1083/jcb.201909073] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 06/23/2020] [Accepted: 08/03/2020] [Indexed: 12/27/2022] Open
Abstract
Macroautophagy (autophagy) targets cytoplasmic cargoes to the lysosome for degradation. Like all vesicle trafficking, autophagy relies on phosphoinositide identity, concentration, and localization to execute multiple steps in this catabolic process. Here, we screen for phosphoinositide phosphatases that influence autophagy in Drosophila and identify CG3530. CG3530 is homologous to the human MTMR6 subfamily of myotubularin-related 3-phosphatases, and therefore, we named it dMtmr6. dMtmr6, which is required for development and viability in Drosophila, functions as a regulator of autophagic flux in multiple Drosophila cell types. The MTMR6 family member MTMR8 has a similar function in autophagy of higher animal cells. Decreased dMtmr6 and MTMR8 function results in autophagic vesicle accumulation and influences endolysosomal homeostasis.
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Affiliation(s)
- Elizabeth A Allen
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA
| | - Clelia Amato
- Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Tina M Fortier
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA
| | - Panagiotis Velentzas
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA
| | - Will Wood
- Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Eric H Baehrecke
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA
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10
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Manzéger A, Tagscherer K, Lőrincz P, Szaker H, Lukácsovich T, Pilz P, Kméczik R, Csikós G, Erdélyi M, Sass M, Kovács T, Vellai T, Billes VA. Condition-dependent functional shift of two Drosophila Mtmr lipid phosphatases in autophagy control. Autophagy 2021; 17:4010-4028. [PMID: 33779490 PMCID: PMC8726729 DOI: 10.1080/15548627.2021.1899681] [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] [Indexed: 11/20/2022] Open
Abstract
Myotubularin (MTM) and myotubularin-related (MTMR) lipid phosphatases catalyze the removal of a phosphate group from certain phosphatidylinositol derivatives. Because some of these substrates are required for macroautophagy/autophagy, during which unwanted cytoplasmic constituents are delivered into lysosomes for degradation, MTM and MTMRs function as important regulators of the autophagic process. Despite its physiological and medical significance, the specific role of individual MTMR paralogs in autophagy control remains largely unexplored. Here we examined two Drosophila MTMRs, EDTP and Mtmr6, the fly orthologs of mammalian MTMR14 and MTMR6 to MTMR8, respectively, and found that these enzymes affect the autophagic process in a complex, condition-dependent way. EDTP inhibited basal autophagy, but did not influence stress-induced autophagy. In contrast, Mtmr6 promoted the process under nutrient-rich settings, but effectively blocked its hyperactivation in response to stress. Thus, Mtmr6 is the first identified MTMR phosphatase with dual, antagonistic roles in the regulation of autophagy, and shows conditional antagonism/synergism with EDTP in modulating autophagic breakdown. These results provide a deeper insight into the adjustment of autophagy. Abbreviations: Atg, autophagy-related; BDSC, Bloomington Drosophila Stock Center; DGRC, Drosophila Genetic Resource Center; EDTP, Egg-derived tyrosine phosphatase; FYVE, zinc finger domain from Fab1 (yeast ortholog of PIKfyve), YOTB, Vac1 (vesicle transport protein) and EEA1 cysteine-rich proteins; LTR, LysoTracker Red; MTM, myotubularin; MTMR, myotubularin-related; PI, phosphatidylinositol; Pi3K59F, Phosphotidylinositol 3 kinase 59F; PtdIns3P, phosphatidylinositol-3-phosphate; PtdIns(3,5)P2, phosphatidylinositol-3,5-bisphosphate; PtdIns5P, phosphatidylinositol-5-phosphate; ref(2)P, refractory to sigma P; Syx17, Syntaxin 17; TEM, transmission electron microscopy; UAS, upstream activating sequence; Uvrag, UV-resistance associated gene; VDRC, Vienna Drosophila RNAi Center; Vps34, Vacuolar protein sorting 34.
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Affiliation(s)
- Anna Manzéger
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary.,MTA-ELTE Genetics Research Group, Budapest, Hungary
| | - Kinga Tagscherer
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Péter Lőrincz
- Department of Anatomy, Cell and Developmental Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Hungarian Academy of Sciences, Premium Postdoctoral Research Program, Budapest, Hungary
| | - Henrik Szaker
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Tamás Lukácsovich
- Department of Developmental and Cell Biology, University of California, Irvine, CA, USA
| | - Petra Pilz
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Regina Kméczik
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - George Csikós
- Department of Anatomy, Cell and Developmental Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Miklós Erdélyi
- Institute of Genetics, Biological Research Centre, Szeged, Hungary
| | - Miklós Sass
- Department of Anatomy, Cell and Developmental Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Tibor Kovács
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Tibor Vellai
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary.,MTA-ELTE Genetics Research Group, Budapest, Hungary
| | - Viktor A Billes
- Department of Genetics, ELTE Eötvös Loránd University, Budapest, Hungary.,MTA-ELTE Genetics Research Group, Budapest, Hungary
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11
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Luo D, Shan Z, Liu Q, Cai S, Li Q, Li X. A Novel Seventeen-Gene Metabolic Signature for Predicting Prognosis in Colon Cancer. Biomed Res Int 2020; 2020:4845360. [PMID: 33282950 DOI: 10.1155/2020/4845360] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 09/28/2020] [Accepted: 10/18/2020] [Indexed: 02/08/2023]
Abstract
A metabolic disorder is considered one of the hallmarks of cancer. Multiple differentially expressed metabolic genes have been identified in colon cancer (CC), and their biological functions and prognostic values have been well explored. The purpose of the present study was to establish a metabolic signature to optimize the prognostic prediction in CC. The related data were downloaded from The Cancer Genome Atlas (TCGA), Genotype-Tissue Expression (GTEx) database, and Gene Expression Omnibus (GEO) combined with GSE39582 set, GSE17538 set, GSE33113 set, and GSE37892 set. The differentially expressed metabolic genes were selected for univariate Cox regression and lasso Cox regression analysis using TCGA and GTEx datasets. Finally, a seventeen-gene metabolic signature was developed to divide patients into a high-risk group and a low-risk group. Patients in the high-risk group presented poorer prognosis compared to the low-risk group in both TCGA and GEO datasets. Moreover, gene set enrichment analyses demonstrated multiple significantly enriched metabolism-related pathways. To sum up, our study described a novel seventeen-gene metabolic signature for prognostic prediction of colon cancer.
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12
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Weidner P, Söhn M, Schroeder T, Helm L, Hauber V, Gutting T, Betge J, Röcken C, Rohrbacher FN, Pattabiraman VR, Bode JW, Seger R, Saar D, Nunes-Alves A, Wade RC, Ebert MPA, Burgermeister E. Myotubularin-related protein 7 activates peroxisome proliferator-activated receptor-gamma. Oncogenesis 2020; 9:59. [PMID: 32522977 DOI: 10.1038/s41389-020-0238-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 04/15/2020] [Accepted: 04/21/2020] [Indexed: 02/06/2023] Open
Abstract
Peroxisome proliferator-activated receptor-gamma (PPARγ) is a transcription factor drugable by agonists approved for treatment of type 2 diabetes, but also inhibits carcinogenesis and cell proliferation in vivo. Activating mutations in the Kirsten rat sarcoma viral oncogene homologue (KRAS) gene mitigate these beneficial effects by promoting a negative feedback-loop comprising extracellular signal-regulated kinase 1/2 (ERK1/2) and mitogen-activated kinase kinase 1/2 (MEK1/2)-dependent inactivation of PPARγ. To overcome this inhibitory mechanism, we searched for novel post-translational regulators of PPARγ. Phosphoinositide phosphatase Myotubularin-Related-Protein-7 (MTMR7) was identified as cytosolic interaction partner of PPARγ. Synthetic peptides were designed resembling the regulatory coiled-coil (CC) domain of MTMR7, and their activities studied in human cancer cell lines and C57BL6/J mice. MTMR7 formed a complex with PPARγ and increased its transcriptional activity by inhibiting ERK1/2-dependent phosphorylation of PPARγ. MTMR7-CC peptides mimicked PPARγ-activation in vitro and in vivo due to LXXLL motifs in the CC domain. Molecular dynamics simulations and docking predicted that peptides interact with the steroid receptor coactivator 1 (SRC1)-binding site of PPARγ. Thus, MTMR7 is a positive regulator of PPARγ, and its mimicry by synthetic peptides overcomes inhibitory mechanisms active in cancer cells possibly contributing to the failure of clinical studies targeting PPARγ.
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13
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Wang Y, Lei X, Gao C, Xue Y, Li X, Wang H, Feng Y. MiR-506-3p suppresses the proliferation of ovarian cancer cells by negatively regulating the expression of MTMR6. J Biosci 2019; 44:126. [PMID: 31894107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
MicroRNAs have been reported to play a crucial role in ovarian cancer (OC) as the most lethal malignancy of the women. Here, we found miR-506-3p was significantly down-regulated in OC tissues compared with corresponding adjacent nontumor tissues. Ectopic miR-506-3p expression inhibited OC cell growth and proliferation using MTT and colony formation assay. Additionally, flow cytometry analysis showed that the overexpression of miR-506-3p induced cell cycle G0/G1 phase arrest and cell apoptosis in OC cells. A luciferase reporter assay confirmed that the myotubularin-related protein 6 (MTMR6) was the target of miR-506-3p. The expression of MTMR6 was increased in OC tissues compared with adjacent tissues using immunohistochemistry. Elevated MTMR6 protein levels were confirmed in OC cells lines compared with immortalized fallopian tube epithelial cell line FTE187 using western blotting. In addition, knockdown of MTMR6 imitated the effects of miR-506-3p on cell proliferation, cell cycle progression and apoptosis in OC cells. Furthermore, rescue experiments using MTMR6 overexpression further verified that MTMR6 was a functional target of miR-506-3p. Our data indicate that miR-506-3p might serve as a tumor suppressor gene and propose a new regulatory mechanism of MTMR6 by miR-506-3p in OC.
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Affiliation(s)
- Yuan Wang
- Department of Gynaecology, Yan'an University Affiliated Hospital, Yanan, Shaanxi Province, China
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14
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Wang P, Wang Y, Langley SA, Zhou YX, Jen KY, Sun Q, Brislawn C, Rojas CM, Wahl KL, Wang T, Fan X, Jansson JK, Celniker SE, Zou X, Threadgill DW, Snijders AM, Mao JH. Diverse tumour susceptibility in Collaborative Cross mice: identification of a new mouse model for human gastric tumourigenesis. Gut 2019; 68:1942-1952. [PMID: 30842212 PMCID: PMC6839736 DOI: 10.1136/gutjnl-2018-316691] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The Collaborative Cross (CC) is a mouse population model with diverse and reproducible genetic backgrounds used to identify novel disease models and genes that contribute to human disease. Since spontaneous tumour susceptibility in CC mice remains unexplored, we assessed tumour incidence and spectrum. DESIGN We monitored 293 mice from 18 CC strains for tumour development. Genetic association analysis and RNA sequencing were used to identify susceptibility loci and candidate genes. We analysed genomes of patients with gastric cancer to evaluate the relevance of genes identified in the CC mouse model and measured the expression levels of ISG15 by immunohistochemical staining using a gastric adenocarcinoma tissue microarray. Association of gene expression with overall survival (OS) was assessed by Kaplan-Meier analysis. RESULTS CC mice displayed a wide range in the incidence and types of spontaneous tumours. More than 40% of CC036 mice developed gastric tumours within 1 year. Genetic association analysis identified Nfκb1 as a candidate susceptibility gene, while RNA sequencing analysis of non-tumour gastric tissues from CC036 mice showed significantly higher expression of inflammatory response genes. In human gastric cancers, the majority of human orthologues of the 166 mouse genes were preferentially altered by amplification or deletion and were significantly associated with OS. Higher expression of the CC036 inflammatory response gene signature is associated with poor OS. Finally, ISG15 protein is elevated in gastric adenocarcinomas and correlated with shortened patient OS. CONCLUSIONS CC strains exhibit tremendous variation in tumour susceptibility, and we present CC036 as a spontaneous laboratory mouse model for studying human gastric tumourigenesis.
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Affiliation(s)
- Pin Wang
- Department of Gastroenterology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China,Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Yunshan Wang
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA,Clinical Laboratory, Second Hospital of Shandong University, Jinan, China
| | - Sasha A Langley
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Yan-Xia Zhou
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA,College of Marine Science, Shandong University, Weihai, China
| | - Kuang-Yu Jen
- Department of Pathology, University of California Davis Medical Center, Sacramento, California, USA
| | - Qi Sun
- Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Colin Brislawn
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Carolina M Rojas
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas, USA,Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas, USA
| | - Kimberly L Wahl
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas, USA,Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas, USA
| | - Ting Wang
- Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Xiangshan Fan
- Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Janet K Jansson
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Susan E Celniker
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Xiaoping Zou
- Department of Gastroenterology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - David W Threadgill
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas, USA,Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas, USA
| | - Antoine M Snijders
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Jian-Hua Mao
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
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15
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Wang Y, Lei X, Gao C, Xue Y, Li X, Wang H, Feng Y. MiR-506-3p suppresses the proliferation of ovarian cancer cells by negatively regulating the expression of MTMR6. J Biosci 2019; 44. [DOI: 10.1007/s12038-019-9952-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Zhao D, Shen C, Gao T, Li H, Guo Y, Li F, Liu C, Liu Y, Chen X, Zhang X, Wu Y, Yu Y, Lin M, Yuan Y, Chen X, Huang X, Yang S, Yu J, Zhang J, Zheng B. Myotubularin related protein 7 is essential for the spermatogonial stem cell homeostasis via PI3K/AKT signaling. Cell Cycle 2019; 18:2800-2813. [PMID: 31478454 DOI: 10.1080/15384101.2019.1661174] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Myotubularin related protein 7 (MTMR7), a key member of the MTMR family, depicts phosphatase activity and is involved in myogenesis and tumor growth. We have previously identified MTMR7 in the proteomic profile of mouse spermatogonial stem cell (SSC) maturation and differentiation, implying that MTMR7 is associated with neonatal testicular development. In this study, to further explore the distribution and function of MTMR7 in mouse testis, we studied the effect of Mtmr7 knockdown on neonatal testicular development by testicular and SSC culture methods. Our results revealed that MTMR7 is exclusively located in early germ cells. Deficiency of MTMR7 by morpholino in neonatal testis caused excessive SSC proliferation, which was attributable to the aberrant PI3K/AKT signaling activation. Altogether, our study demonstrates that MTMR7 maintains SSC homeostasis by inhibiting PI3K/AKT signaling activation.
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Affiliation(s)
- Dan Zhao
- Fourth Affiliated Hospital of Jiangsu University , Zhenjiang , China
| | - Cong Shen
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China.,State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Tingting Gao
- Center of Clinical Reproductive Medicine, the Affiliated Changzhou Matemity and Child Health Care Hospital of Nanjing Medical University , Changzhou , China
| | - Hong Li
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Yueshuai Guo
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China.,The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University , Wuxi , China
| | - Feng Li
- Fourth Affiliated Hospital of Jiangsu University , Zhenjiang , China.,Reproductive Medicine Center, Northern Jiangsu Province Hospital , Yangzhou , China
| | - Chenchen Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yuanyuan Liu
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China.,State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Xia Chen
- Department of Obstetrics and Gynecology, Affiliated Hospital of Jiangsu University, Jiangsu University , Zhenjiang , China
| | - Xi Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yangyang Wu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yi Yu
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Meng Lin
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yan Yuan
- Human Reproductive and Genetic center, Affiliated Hospital of Jiangnan University , Wuxi , China
| | - Xiaofang Chen
- Fourth Affiliated Hospital of Jiangsu University , Zhenjiang , China
| | - Xiaoyan Huang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Shenmin Yang
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Jun Yu
- Department of Obstetrics and Gynecology, Affiliated Hospital of Jiangsu University, Jiangsu University , Zhenjiang , China
| | - Jun Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Bo Zheng
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China.,State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
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17
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Wu F, Zhao Z, Chai RC, Liu YQ, Li GZ, Jiang HY, Jiang T. Prognostic power of a lipid metabolism gene panel for diffuse gliomas. J Cell Mol Med 2019; 23:7741-7748. [PMID: 31475440 PMCID: PMC6815778 DOI: 10.1111/jcmm.14647] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [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: 04/20/2019] [Revised: 07/29/2019] [Accepted: 08/13/2019] [Indexed: 01/17/2023] Open
Abstract
Lipid metabolism reprogramming plays important role in cell growth, proliferation, angiogenesis and invasion in cancers. However, the diverse lipid metabolism programmes and prognostic value during glioma progression remain unclear. Here, the lipid metabolism-related genes were profiled using RNA sequencing data from The Cancer Genome Atlas (TCGA) and Chinese Glioma Genome Atlas (CGGA) database. Gene ontology (GO) and gene set enrichment analysis (GSEA) found that glioblastoma (GBM) mainly exhibited enrichment of glycosphingolipid metabolic progress, whereas lower grade gliomas (LGGs) showed enrichment of phosphatidylinositol metabolic progress. According to the differential genes of lipid metabolism between LGG and GBM, we developed a nine-gene set using Cox proportional hazards model with elastic net penalty, and the CGGA cohort was used for validation data set. Survival analysis revealed that the obtained gene set could differentiate the outcome of low- and high-risk patients in both cohorts. Meanwhile, multivariate Cox regression analysis indicated that this signature was a significantly independent prognostic factor in diffuse gliomas. Gene ontology and GSEA showed that high-risk cases were associated with phenotypes of cell division and immune response. Collectively, our findings provided a new sight on lipid metabolism in diffuse gliomas.
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Affiliation(s)
- Fan Wu
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Zheng Zhao
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Rui-Chao Chai
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Yu-Qing Liu
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Guan-Zhang Li
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Hao-Yu Jiang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
| | - Tao Jiang
- Department of Molecular Neuropathology, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China.,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Chinese Glioma Genome Atlas Network (CGGA) and Asian Glioma Genome Atlas Network (AGGA), Beijing, China
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18
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Li Z, Rong L, Lian H, Cheng J, Wu X, Li X. Knockdown MTMR14 promotes cell apoptosis and inhibits migration in liver cancer cells. Gene 2018; 691:106-113. [PMID: 30586604 DOI: 10.1016/j.gene.2018.11.099] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/12/2018] [Accepted: 11/29/2018] [Indexed: 12/19/2022]
Abstract
Myotubularin-related protein 14 (MTMR14) is a member of the myotubularin (MTM)-related protein family and plays a key role in cardiomyopathy and autophagy. However, its potential implication in human cancer is unclear. In this study, we have investigated the expression profile of MTMR14 and its functional impact in liver cancer for the first time. Expression analysis by quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry demonstrated that MTMR14 expression is obviously overexpressed in liver cancer, and positively correlated with clinical stage. A loss-of-function study showed that knockdown of MTMR14 promotes cell apoptosis and inhibits cell migration. MTMR14 knockdown also inhibits tumor migration in vivo in liver cancer peritoneal implantation nude mouse model. A molecular mechanistic study by western blot showed that Knockdown MTMR14 causes downregulation of N-cadherin and E-cadherin, and promotes the cleavage and activation of caspase12, caspase9 and caspase3, but excluding caspase8. These results suggest that MTMR14 affects cell migration through N-cadherin and E-cadherin. Additionally, MTMR14 affects cell apoptosis through mitochondrial pathway but not the death receptor pathway. Herein, our results indicate MTMR14 could have an oncogenic role in human liver cancer and thus demonstrates its potential as a target for the diagnosis and/or treatment of liver cancer.
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Affiliation(s)
- Zhaodong Li
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, 74#Linjiang Road, Yuzhong District, Chongqing City 400001, PR China
| | - Li Rong
- Department of Gastroenterology, Chongqing Infectious Disease Medical Center, Chongqing City 400030, PR China
| | - Haifeng Lian
- Department of Gastroenterology, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, PR China
| | - Junning Cheng
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, 74#Linjiang Road, Yuzhong District, Chongqing City 400001, PR China
| | - Xiaoling Wu
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, 74#Linjiang Road, Yuzhong District, Chongqing City 400001, PR China.
| | - Xiang Li
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, 1#Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China.
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19
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Narla G, Sangodkar J, Ryder CB. The impact of phosphatases on proliferative and survival signaling in cancer. Cell Mol Life Sci 2018; 75:2695-2718. [PMID: 29725697 PMCID: PMC6023766 DOI: 10.1007/s00018-018-2826-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 12/06/2017] [Revised: 03/24/2018] [Accepted: 04/23/2018] [Indexed: 02/06/2023]
Abstract
The dynamic and stringent coordination of kinase and phosphatase activity controls a myriad of physiologic processes. Aberrations that disrupt the balance of this interplay represent the basis of numerous diseases. For a variety of reasons, early work in this area portrayed kinases as the dominant actors in these signaling events with phosphatases playing a secondary role. In oncology, these efforts led to breakthroughs that have dramatically altered the course of certain diseases and directed vast resources toward the development of additional kinase-targeted therapies. Yet, more recent scientific efforts have demonstrated a prominent and sometimes driving role for phosphatases across numerous malignancies. This maturation of the phosphatase field has brought with it the promise of further therapeutic advances in the field of oncology. In this review, we discuss the role of phosphatases in the regulation of cellular proliferation and survival signaling using the examples of the MAPK and PI3K/AKT pathways, c-Myc and the apoptosis machinery. Emphasis is placed on instances where these signaling networks are perturbed by dysregulation of specific phosphatases to favor growth and persistence of human cancer.
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Affiliation(s)
| | - Jaya Sangodkar
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
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20
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Belfiore A, Malaguarnera R, Vella V, Lawrence MC, Sciacca L, Frasca F, Morrione A, Vigneri R. Insulin Receptor Isoforms in Physiology and Disease: An Updated View. Endocr Rev 2017; 38:379-431. [PMID: 28973479 PMCID: PMC5629070 DOI: 10.1210/er.2017-00073] [Citation(s) in RCA: 234] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/13/2017] [Indexed: 02/08/2023]
Abstract
The insulin receptor (IR) gene undergoes differential splicing that generates two IR isoforms, IR-A and IR-B. The physiological roles of IR isoforms are incompletely understood and appear to be determined by their different binding affinities for insulin-like growth factors (IGFs), particularly for IGF-2. Predominant roles of IR-A in prenatal growth and development and of IR-B in metabolic regulation are well established. However, emerging evidence indicates that the differential expression of IR isoforms may also help explain the diversification of insulin and IGF signaling and actions in various organs and tissues by involving not only different ligand-binding affinities but also different membrane partitioning and trafficking and possibly different abilities to interact with a variety of molecular partners. Of note, dysregulation of the IR-A/IR-B ratio is associated with insulin resistance, aging, and increased proliferative activity of normal and neoplastic tissues and appears to sustain detrimental effects. This review discusses novel information that has generated remarkable progress in our understanding of the physiology of IR isoforms and their role in disease. We also focus on novel IR ligands and modulators that should now be considered as an important strategy for better and safer treatment of diabetes and cancer and possibly other IR-related diseases.
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Affiliation(s)
- Antonino Belfiore
- Endocrinology, Department of Health Sciences, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy
| | - Roberta Malaguarnera
- Endocrinology, Department of Health Sciences, University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy
| | - Veronica Vella
- School of Human and Social Sciences, University Kore of Enna, via della Cooperazione, 94100 Enna, Italy
| | - Michael C. Lawrence
- Structural Biology Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Laura Sciacca
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122 Catania, Italy
| | - Francesco Frasca
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122 Catania, Italy
| | - Andrea Morrione
- Department of Urology and Biology of Prostate Cancer Program, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Riccardo Vigneri
- Endocrinology, Department of Clinical and Experimental Medicine, University of Catania, Garibaldi-Nesima Hospital, 95122 Catania, Italy
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Raess MA, Friant S, Cowling BS, Laporte J. WANTED - Dead or alive: Myotubularins, a large disease-associated protein family. Adv Biol Regul 2017; 63:49-58. [PMID: 27666502 DOI: 10.1016/j.jbior.2016.09.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 09/13/2016] [Accepted: 09/13/2016] [Indexed: 11/21/2022]
Abstract
Myotubularins define a large family of proteins conserved through evolution. Several members are mutated in different neuromuscular diseases including centronuclear myopathies and Charcot-Marie-Tooth (CMT) neuropathies, or are linked to a predisposition to obesity and cancer. While some members have phosphatase activity against the 3-phosphate of phosphoinositides, regulating the phosphorylation status of PtdIns3P and PtdIns(3,5)P2 implicated in membrane trafficking and autophagy, and producing PtdIns5P, others lack key residues in the catalytic site and are classified as dead-phosphatases. However, these dead phosphatases regulate phosphoinositide-dependent cellular pathways by binding to catalytically active myotubularins. Here we review previous studies on the molecular regulation and physiological roles of myotubularins. We also used the recent myotubularins three-dimensional structures to underline key residues that are mutated in neuromuscular diseases and required for enzymatic activity. In addition, through database mining and analysis, expression profile and specific isoforms of the different myotubularins are described in depth, as well as a revisited protein interaction network. Comparison of the interactome and expression data for each myotubularin highlights specific protein complexes and tissues where myotubularins should have a key regulatory role.
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