51
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Brandt C, Nolte H, Henschke S, Engström Ruud L, Awazawa M, Morgan DA, Gabel P, Sprenger HG, Hess ME, Günther S, Langer T, Rahmouni K, Fenselau H, Krüger M, Brüning JC. Food Perception Primes Hepatic ER Homeostasis via Melanocortin-Dependent Control of mTOR Activation. Cell 2019; 175:1321-1335.e20. [PMID: 30445039 DOI: 10.1016/j.cell.2018.10.015] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/10/2018] [Accepted: 10/02/2018] [Indexed: 12/17/2022]
Abstract
Adaptation of liver to the postprandial state requires coordinated regulation of protein synthesis and folding aligned with changes in lipid metabolism. Here we demonstrate that sensory food perception is sufficient to elicit early activation of hepatic mTOR signaling, Xbp1 splicing, increased expression of ER-stress genes, and phosphatidylcholine synthesis, which translate into a rapid morphological ER remodeling. These responses overlap with those activated during refeeding, where they are maintained and constantly increased upon nutrient supply. Sensory food perception activates POMC neurons in the hypothalamus, optogenetic activation of POMC neurons activates hepatic mTOR signaling and Xbp1 splicing, whereas lack of MC4R expression attenuates these responses to sensory food perception. Chemogenetic POMC-neuron activation promotes sympathetic nerve activity (SNA) subserving the liver, and norepinephrine evokes the same responses in hepatocytes in vitro and in liver in vivo as observed upon sensory food perception. Collectively, our experiments unravel that sensory food perception coordinately primes postprandial liver ER adaption through a melanocortin-SNA-mTOR-Xbp1s axis. VIDEO ABSTRACT.
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Affiliation(s)
- Claus Brandt
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | - Hendrik Nolte
- Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; Institute for Genetics, University of Cologne, Cologne 50931, Germany
| | - Sinika Henschke
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | - Linda Engström Ruud
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | - Motoharu Awazawa
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | - Donald A Morgan
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, 3181 MERF, 375 Newton Rd., Iowa City, IA 52242, USA
| | - Paula Gabel
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | | | - Martin E Hess
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany
| | - Stefan Günther
- Max Planck Institute for Heart and Lung Research, Parkstr. 1, 61231 Bad Nauheim, Germany
| | - Thomas Langer
- Institute for Genetics, University of Cologne, Cologne 50931, Germany; Max-Planck-Institute for Biology of Ageing, 50931 Cologne, Germany
| | - Kamal Rahmouni
- Department of Pharmacology, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, 3181 MERF, 375 Newton Rd., Iowa City, IA 52242, USA
| | - Henning Fenselau
- Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; Synaptic Transmission in Energy Homeostasis Group, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany
| | - Marcus Krüger
- Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; Institute for Genetics, University of Cologne, Cologne 50931, Germany
| | - Jens C Brüning
- Department of Neuronal Control of Metabolism, Max Planck Institute for Metabolism Research, Gleueler Strasse 50, 50931 Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEDP), University Hospital Cologne, Kerpener Strasse 26, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Cologne, Germany; National Center for Diabetes Research (DZD), Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany.
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52
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Chaillou T. Ribosome specialization and its potential role in the control of protein translation and skeletal muscle size. J Appl Physiol (1985) 2019; 127:599-607. [DOI: 10.1152/japplphysiol.00946.2018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The ribosome is typically viewed as a supramolecular complex with constitutive and invariant capacity in mediating translation of mRNA into protein. This view has been challenged by recent research revealing that ribosome composition could be heterogeneous, and this heterogeneity leads to functional ribosome specialization. This review presents the idea that ribosome heterogeneity results from changes in its various components, including variations in ribosomal protein (RP) composition, posttranslational modifications of RPs, changes in ribosomal-associated proteins, alternative forms of rRNA, and posttranscriptional modifications of rRNAs. Ribosome heterogeneity could be orchestrated at several levels and may depend on numerous factors, such as the subcellular location, cell type, tissue specificity, the development state, cell state, ribosome biogenesis, RP turnover, physiological stimuli, and circadian rhythm. Ribosome specialization represents a completely new concept for the regulation of gene expression. Specialized ribosomes could modulate several aspects of translational control, such as mRNA translation selectivity, translation initiation, translational fidelity, and translation elongation. Recent research indicates that the expression of Rpl3 is markedly increased, while that of Rpl3l is highly reduced during mouse skeletal muscle hypertrophy. Moreover, Rpl3l overexpression impairs the growth and myogenic fusion of myotubes. Although the function of Rpl3 and Rpl3l in the ribosome remains to be clarified, these findings suggest that ribosome specialization may be potentially involved in the control of protein translation and skeletal muscle size. Limited data concerning ribosome specialization are currently available in skeletal muscle. Future investigations have the potential to delineate the function of specialized ribosomes in skeletal muscle.
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Affiliation(s)
- Thomas Chaillou
- School of Health Sciences, Örebro University, Örebro, Sweden
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53
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Agostinone J, Alarcon-Martinez L, Gamlin C, Yu WQ, Wong ROL, Di Polo A. Insulin signalling promotes dendrite and synapse regeneration and restores circuit function after axonal injury. Brain 2019; 141:1963-1980. [PMID: 29931057 PMCID: PMC6022605 DOI: 10.1093/brain/awy142] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 04/06/2018] [Indexed: 01/07/2023] Open
Abstract
Dendrite pathology and synapse disassembly are critical features of chronic neurodegenerative diseases. In spite of this, the capacity of injured neurons to regenerate dendrites has been largely ignored. Here, we show that, upon axonal injury, retinal ganglion cells undergo rapid dendritic retraction and massive synapse loss that preceded neuronal death. Human recombinant insulin, administered as eye drops or systemically after dendritic arbour shrinkage and prior to cell loss, promoted robust regeneration of dendrites and successful reconnection with presynaptic targets. Insulin-mediated regeneration of excitatory postsynaptic sites on retinal ganglion cell dendritic processes increased neuronal survival and rescued light-triggered retinal responses. Further, we show that axotomy-induced dendrite retraction triggered substantial loss of the mammalian target of rapamycin (mTOR) activity exclusively in retinal ganglion cells, and that insulin fully reversed this response. Targeted loss-of-function experiments revealed that insulin-dependent activation of mTOR complex 1 (mTORC1) is required for new dendritic branching to restore arbour complexity, while complex 2 (mTORC2) drives dendritic process extension thus re-establishing field area. Our findings demonstrate that neurons in the mammalian central nervous system have the intrinsic capacity to regenerate dendrites and synapses after injury, and provide a strong rationale for the use of insulin and/or its analogues as pro-regenerative therapeutics for intractable neurodegenerative diseases including glaucoma.
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Affiliation(s)
- Jessica Agostinone
- Department of Neuroscience, University of Montreal, Montreal, Quebec, Canada.,University of Montreal Hospital Research Center (CR-CHUM), University of Montreal, Montreal, Quebec, Canada
| | - Luis Alarcon-Martinez
- Department of Neuroscience, University of Montreal, Montreal, Quebec, Canada.,University of Montreal Hospital Research Center (CR-CHUM), University of Montreal, Montreal, Quebec, Canada
| | - Clare Gamlin
- Department of Biological Structure, University of Washington, 1959 NE Pacific Street, Seattle, Washington, USA
| | - Wan-Qing Yu
- Department of Biological Structure, University of Washington, 1959 NE Pacific Street, Seattle, Washington, USA
| | - Rachel O L Wong
- Department of Biological Structure, University of Washington, 1959 NE Pacific Street, Seattle, Washington, USA
| | - Adriana Di Polo
- Department of Neuroscience, University of Montreal, Montreal, Quebec, Canada.,University of Montreal Hospital Research Center (CR-CHUM), University of Montreal, Montreal, Quebec, Canada
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54
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Zeng JD, Wu WKK, Wang HY, Li XX. Serine and one-carbon metabolism, a bridge that links mTOR signaling and DNA methylation in cancer. Pharmacol Res 2019; 149:104352. [PMID: 31323332 DOI: 10.1016/j.phrs.2019.104352] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 12/24/2022]
Abstract
Mammalian / mechanistic target of rapamycin (mTOR) is a critical sensor of environmental cues that regulates cellular macromolecule synthesis and metabolism in eukaryotes. DNA methylation is the most well-studied epigenetic modification that is capable of regulating gene transcription and affecting genome stability. Both dysregulation of mTOR signaling and DNA methylation patterns have been shown to be closely linked to tumor progression and serve as promising targets for cancer therapy. Although their respective roles in tumorigenesis have been extensively studied, whether molecular interplay exists between them is still largely unknown. In this review, we provide a brief overview of mTOR signaling, DNA methylation as well as related serine and one-carbon metabolism, one of the most critical aspects of metabolic reprogramming in cancer. Based on the latest understanding regarding the regulation of metabolic processes by mTOR signaling as well as interaction between metabolism and epigenetics, we further discuss how serine and one-carbon metabolism may serve as a bridge that links mTOR signaling and DNA methylation to promote tumor growth. Elucidating their relationship may provide novel insight for cancer therapy in the future.
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Affiliation(s)
- Ju-Deng Zeng
- State Key Laboratory of Oncology in South China, Collaborative Innovation center for Cancer Medicine, Sun Yat-sen University cancer center, Guangzhou, Guangdong, China; Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
| | - William K K Wu
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China; State Key Laboratory of Digestive diseases, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Hui-Yun Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation center for Cancer Medicine, Sun Yat-sen University cancer center, Guangzhou, Guangdong, China.
| | - Xiao-Xing Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation center for Cancer Medicine, Sun Yat-sen University cancer center, Guangzhou, Guangdong, China.
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55
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Park BH, Shin MH, Douglas IS, Chung KS, Song JH, Kim SY, Kim EY, Jung JY, Kang YA, Chang J, Kim YS, Park MS. Erythropoietin-Producing Hepatoma Receptor Tyrosine Kinase A2 Modulation Associates with Protective Effect of Prone Position in Ventilator-induced Lung Injury. Am J Respir Cell Mol Biol 2019; 58:519-529. [PMID: 29216437 DOI: 10.1165/rcmb.2017-0143oc] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The erythropoietin-producing hepatoma (Eph) receptor tyrosine kinase A2 (EphA2) and its ligand, ephrinA1, play a pivotal role in inflammation and tissue injury by modulating the epithelial and endothelial barrier integrity. Therefore, EphA2 receptor may be a potential therapeutic target for modulating ventilator-induced lung injury (VILI). To support this hypothesis, here, we analyzed EphA2/ephrinA1 signaling in the process of VILI and determined the role of EphA2/ephrinA1 signaling in the protective mechanism of prone positioning in a VILI model. Wild-type mice were ventilated with high (24 ml/kg; positive end-expiratory pressure, 0 cm; 5 h) tidal volume in a supine or prone position. Anti-EphA2 receptor antibody or IgG was administered to the supine position group. Injury was assessed by analyzing the BAL fluid, lung injury scoring, and transmission electron microscopy. Lung lysates were evaluated using cytokine/chemokine ELISA and Western blotting of EphA2, ephrinA1, PI3Kγ, Akt, NF-κB, and P70S6 kinase. EphA2/ephrinA1 expression was higher in the supine high tidal volume group than in the control group, but it did not increase upon prone positioning or anti-EphA2 receptor antibody treatment. EphA2 antagonism reduced the extent of VILI and downregulated the expression of PI3Kγ, Akt, NF-κB, and P70S6 kinase. These findings demonstrate that EphA2/ephrinA1 signaling is involved in the molecular mechanism of VILI and that modulation of EphA2/ehprinA1 signaling by prone position or EphA2 antagonism may be associated with the lung-protective effect. Our data provide evidence for EphA2/ehprinA1 as a promising therapeutic target for modulating VILI.
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Affiliation(s)
- Byung Hoon Park
- 1 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Gyeonggi Provincial Medical Center Paju Hospital, Paju City, Gyeonggi-Do, Republic of Korea
| | - Mi Hwa Shin
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Ivor S Douglas
- 3 Division of Pulmonary Sciences and Critical Care Medicine, Denver Health Medical Center, University of Colorado School of Medicine, Denver, Colorado
| | - Kyung Soo Chung
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Joo Han Song
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Song Yee Kim
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Eun Young Kim
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Ji Ye Jung
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Young Ae Kang
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Joon Chang
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Young Sam Kim
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
| | - Moo Suk Park
- 2 Division of Pulmonology, The Institute of Chest Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; and
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56
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Pei T, Huang X, Long Y, Duan C, Liu T, Li Y, Huang W. Increased expression of YAP is associated with decreased cell autophagy in the eutopic endometrial stromal cells of endometriosis. Mol Cell Endocrinol 2019; 491:110432. [PMID: 31014943 DOI: 10.1016/j.mce.2019.04.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 02/09/2023]
Abstract
Basic research has shown that signal pathways play significant roles in the development and progression of endometriosis (EMS). We first reported that the Hippo-YAP (Yes-associated protein) pathway promotes cell proliferation and anti-apoptosis in endometrial stromal cells (ESCs) of EMS. Cell autophagy has been found to be involved in the endometrial regulation and the pathophysiology of EMS. We speculated that there may be an elaborate dialogue between Hippo-YAP and autophagy pathway in EMS. To explore this, we performed molecular biology experiments to investigate the expressions of YAP pathway and cell autophagy markers (mTOR, LC-3) in ESCs of women with or without EMS and detected the protein levels of autophagy markers after verteporfin and rapamycin treatments and the transfection with YAP-knockdown vector in the eutopic ESCs, respectively. We found that the mRNAs of YAP and mTOR were increased in the eutopic ESCs compared with controls, but no statistically difference, while the protein levels were significantly increased in the eutopic ESCs. Conversely, the ratio of the autophagy marker protein LC3-II/LC3-I was significantly decreased in the eutopic ESCs compared with controls. Moreover, verteporfin treatment interfered with the YAP function, but it had no effect on mTOR expression and cell autophagy level. Rapamycin treatment and YAP knockdown in the eutopic ESCs both inhibited the expression of YAP and increased the ratio of LC3-II/LC3-I significantly. These results demonstrate that the decreased cell autophagy level is associated with the increased expression of YAP and YAP may participate in the mTOR-autophagy pathway in the eutopic ESCs of endometriosis.
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Affiliation(s)
- Tianjiao Pei
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Xin Huang
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Ying Long
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Changling Duan
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Tingting Liu
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Yujing Li
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China
| | - Wei Huang
- Department of Obstetrics and Gynecology, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, Sichuan, 610041, People's Republic of China.
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57
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von Walden F. Ribosome biogenesis in skeletal muscle: coordination of transcription and translation. J Appl Physiol (1985) 2019; 127:591-598. [PMID: 31219775 DOI: 10.1152/japplphysiol.00963.2018] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Skeletal muscle mass responds in a remarkable manner to alterations in loading and use. It has long been clear that skeletal muscle hypertrophy can be prevented by inhibiting RNA synthesis. Since 80% of the cell's total RNA has been estimated to be rRNA, this finding indicates that de novo production of rRNA via transcription of the corresponding genes is important for such hypertrophy to occur. Transcription of rDNA by RNA Pol I is the rate-limiting step in ribosome biogenesis, indicating in turn that this biogenesis strongly influences the hypertrophic response. The present minireview focuses on 1) a brief description of the key steps in ribosome biogenesis and the relationship of this process to skeletal muscle mass and 2) the coordination of ribosome biogenesis and protein synthesis for growth or atrophy, as exemplified by the intracellular AMPK and mTOR pathways.
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Affiliation(s)
- Ferdinand von Walden
- Division of Pediatric Neurology, Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden
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58
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Jia X, Shi L, Wang X, Luo L, Ling L, Yin J, Song Y, Zhang Z, Qiu N, Liu H, Deng M, He Z, Li H, Zheng G. KLF5 regulated lncRNA RP1 promotes the growth and metastasis of breast cancer via repressing p27kip1 translation. Cell Death Dis 2019; 10:373. [PMID: 31073122 PMCID: PMC6509113 DOI: 10.1038/s41419-019-1566-5] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/28/2019] [Accepted: 04/01/2019] [Indexed: 12/20/2022]
Abstract
Increasing evidence suggest that lncRNAs (long noncoding RNAs) play important roles in human cancer. Breast cancer is a heterogeneous disease and the potential involvement of lncRNAs in breast cancer remains unexplored. In this study, we characterized a novel lncRNA, RP1-5O6.5 (termed as RP1). We found that RP1 was highly expressed in breast cancer and predicted poor prognosis of breast cancer patients. Gain-of-function and loss-of-function assays showed that RP1 promoted the proliferation and metastasis of breast cancer cells in vitro and in vivo. Mechanistically, RP1 maintained the EMT and stemness states of breast cancer cells via repressing p27kip1 protein expression. RP1 combined with the complex p-4E-BP1/eIF4E to prevent eIF4E from interacting with eIF4G, therefore attenuating the translational efficiency of p27kip1 mRNA. Furthermore, we found that p27kip1 evidently downregulated Snail1 but not ZEB1 to inhibit invasion of breast cancer cells. Kruppel-like factor 5 (KLF5) was positively correlated with RP1 in breast cancer tissues. Moreover, we demonstrated that KLF5 recruited p300 to the RP1 promoter to enhance RP1 expression. Taken together, our findings demonstrated that KLF5-regulated RP1 plays an oncogenic role in breast cancer by suppressing p27kip1, providing support for the clinical investigation of therapeutic approaches focusing on RP1.
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Affiliation(s)
- Xiaoting Jia
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Lejuan Shi
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Xiaorong Wang
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Liyun Luo
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Li Ling
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Jiang Yin
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Ying Song
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Zhijie Zhang
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Ni Qiu
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Hao Liu
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Min Deng
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China
| | - Zhimin He
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China.
| | - Hongsheng Li
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China.
| | - Guopei Zheng
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Key Laboratory of Protein Modification and Degradation, The State Key Laboratory of Respiratory, Guangzhou Key Laboratory of "Translational Medicine on Malignant Tumor Treatment", Hengzhigang Road 78#, Guangzhou, 510095, Guangdong, China.
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59
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O-GlcNAc Transferase Inhibition Differentially Affects Breast Cancer Subtypes. Sci Rep 2019; 9:5670. [PMID: 30952976 PMCID: PMC6450885 DOI: 10.1038/s41598-019-42153-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 03/25/2019] [Indexed: 12/18/2022] Open
Abstract
Post-translational modification of intracellular proteins with a single N-acetylglucosamine sugar (O-GlcNAcylation) regulates signaling, proliferation, metabolism and protein stability. In breast cancer, expression of the enzyme that catalyzes O-GlcNAcylation – O-GlcNAc-transferase (OGT), and the extent of protein O-GlcNAcylation, are upregulated in tumor tissue, and correlate with cancer progression. Here we compare the significance of O-GlcNAcylation in a panel of breast cancer cells of different phenotypes. We find a greater dependency on OGT among triple-negative breast cancer (TNBC) cell lines, which respond to OGT inhibition by undergoing cell cycle arrest and apoptosis. Searching for the cause of this response, we evaluate the changes in the proteome that occur after OGT inhibition or knock-down, employing a reverse-phase protein array (RPPA). We identify transcriptional repressor - hairy and enhancer of split-1 (HES1) - as a mediator of the OGT inhibition response in the TNBC cells. Inhibition of OGT as well as the loss of HES1 results in potent cytotoxicity and apoptosis. The study raises a possibility of using OGT inhibition to potentiate DNA damage in the TNBC cells.
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60
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Tanaka M, Morifuji T, Yoshikawa M, Nakanishi R, Fujino H. Effects of combined treatment with blood flow restriction and low-intensity electrical stimulation on diabetes mellitus-associated muscle atrophy in rats. J Diabetes 2019; 11:326-334. [PMID: 30225988 DOI: 10.1111/1753-0407.12857] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/12/2018] [Accepted: 09/10/2018] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Diabetes mellitus (DM) results in decreased muscle mass and harmful complications. Blood flow restriction (Bfr) and electrical stimulation (ES) increase muscle protein synthesis. We hypothesized that combined Bfr and low-intensity ES may be more effective in preventing diabetes-associated muscle atrophy by inhibiting the downregulation of protein synthesis-related pathways. In this study, the effects of combined Bfr and low-intensity ES on diabetes-associated muscle atrophy were investigated by evaluating advanced glycation end-products (AGEs) and receptor for AGEs (RAGE) in rats. METHODS Twenty-four Goto-Kakizaki (GK) rats were randomly divided into four treatment groups: sedentary DM, DM + Bfr (pressure cuffs placed around the thigh), DM + ES, and DM + Bfr + ES. Six Wistar rats were used as an age-matched control. Levels of AGEs and the expression of RAGE, extracellular signal-regulated kinase (ERK), and ribosomal protein S6 (rpS6) were determined in plantaris muscles. RESULTS Diabetes resulted in a loss of muscle mass and upregulation of AGEs and RAGE in the plantaris muscle compared with the control group. Treatment with Bfr and ES alone failed to attenuate diabetes-associated loss of muscle mass, and could not prevent the upregulation of AGEs. However, the combination of Bfr and ES prevented the diabetes-associated decrease in muscle mass and upregulation of AGEs. In addition, the combination treatment prevented diabetes-associated decreases in the expression of phosphorylated rpS6. CONCLUSIONS Combination treatment with Bfr and ES may prevent diabetes-associated muscle atrophy by upregulating inhibition of AGEs, which leads to the activation of protein synthesis.
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Affiliation(s)
- Minoru Tanaka
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Department of Rehabilitation Science, Osaka Health Science University, Osaka, Japan
| | - Takeshi Morifuji
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Department of Rehabilitation, Osaka Kawasaki Rehabilitation University, Kaizuka, Japan
| | - Madoka Yoshikawa
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Ryosuke Nakanishi
- Department of Rehabilitation, Kobe International University, Kobe, Japan
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
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61
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Narayanan A, Meriin A, Andrews JO, Spille JH, Sherman MY, Cisse II. A first order phase transition mechanism underlies protein aggregation in mammalian cells. eLife 2019; 8:39695. [PMID: 30716021 PMCID: PMC6361590 DOI: 10.7554/elife.39695] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 12/17/2018] [Indexed: 12/15/2022] Open
Abstract
The formation of misfolded protein aggregates is a hallmark of neurodegenerative diseases. The aggregate formation process exhibits an initial lag phase when precursor clusters spontaneously assemble. However, most experimental assays are blind to this lag phase. We develop a quantitative assay based on super-resolution imaging in fixed cells and light sheet imaging of living cells to study the early steps of aggregation in mammalian cells. We find that even under normal growth conditions mammalian cells have precursor clusters. The cluster size distribution is precisely that expected for a so-called super-saturated system in first order phase transition. This means there exists a nucleation barrier, and a critical size above which clusters grow and mature. Homeostasis is maintained through a Szilard model entailing the preferential clearance of super-critical clusters. We uncover a role for a putative chaperone (RuvBL) in this disassembly of large clusters. The results indicate early aggregates behave like condensates. Editorial note: This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all the issues have been addressed (see decision letter).
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Affiliation(s)
- Arjun Narayanan
- Department of Physics, Massachusetts Institute of Technology, Cambridge, United States
| | - Anatoli Meriin
- Department of Biochemistry, Boston University School of Medicine, Boston, United States
| | - J Owen Andrews
- Department of Physics, Massachusetts Institute of Technology, Cambridge, United States
| | - Jan-Hendrik Spille
- Department of Physics, Massachusetts Institute of Technology, Cambridge, United States
| | | | - Ibrahim I Cisse
- Department of Physics, Massachusetts Institute of Technology, Cambridge, United States
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62
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Uchenunu O, Pollak M, Topisirovic I, Hulea L. Oncogenic kinases and perturbations in protein synthesis machinery and energetics in neoplasia. J Mol Endocrinol 2019; 62:R83-R103. [PMID: 30072418 PMCID: PMC6347283 DOI: 10.1530/jme-18-0058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 08/01/2018] [Indexed: 12/17/2022]
Abstract
Notwithstanding that metabolic perturbations and dysregulated protein synthesis are salient features of cancer, the mechanism underlying coordination of cellular energy balance with mRNA translation (which is the most energy consuming process in the cell) is poorly understood. In this review, we focus on recently emerging insights in the molecular underpinnings of the cross-talk between oncogenic kinases, translational apparatus and cellular energy metabolism. In particular, we focus on the central signaling nodes that regulate these processes (e.g. the mechanistic/mammalian target of rapamycin MTOR) and the potential implications of these findings on improving the anti-neoplastic efficacy of oncogenic kinase inhibitors.
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Affiliation(s)
- Oro Uchenunu
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Department of Experimental Medicine, Montreal, Quebec, Canada
| | - Michael Pollak
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Department of Experimental Medicine, Montreal, Quebec, Canada
- Gerald Bronfman Department of Oncology, Montreal, Quebec, Canada
| | - Ivan Topisirovic
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Department of Experimental Medicine, Montreal, Quebec, Canada
- Gerald Bronfman Department of Oncology, Montreal, Quebec, Canada
- Biochemistry Department, McGill University, Montreal, Quebec, Canada
| | - Laura Hulea
- Lady Davis Institute, SMBD JGH, McGill University, Montreal, Quebec, Canada
- Gerald Bronfman Department of Oncology, Montreal, Quebec, Canada
- Correspondence should be addressed to L Hulea:
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63
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Kelly SC, Patel NN, Eccardt AM, Fisher JS. Glucose-dependent trans-plasma membrane electron transport and p70 S6k phosphorylation in skeletal muscle cells. Redox Biol 2018; 27:101075. [PMID: 30578122 PMCID: PMC6859557 DOI: 10.1016/j.redox.2018.101075] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/07/2018] [Accepted: 12/10/2018] [Indexed: 11/05/2022] Open
Abstract
The reduction of extracellular oxidants by intracellular electrons is known as trans-plasma membrane electron transport (tPMET). The goal of this study was to characterize a role of tPMET in the sensing of glucose as a physiological signal. tPMET from C2C12 myotubes was monitored using a cell-impermeable extracellular electron acceptor, water-soluble tetrazolium salt-1 (WST-1). Superoxide dismutase in the incubation medium or exposure to an NADPH oxidase (NOX) isoform 1/4 inhibitor suppressed WST-1 reduction by 70%, suggesting a role of NOXs in tPMET. There was a positive correlation between medium glucose concentration and WST-1 reduction, suggesting that tPMET is a glucose-sensing process. WST-1 reduction was also decreased by an inhibitor of the pentose phosphate pathway, dehydroepiandrosterone. In contrast, glycolytic inhibitors, 3PO and sodium fluoride, did not affect WST-1 reduction. Thus, it appears that glucose uptake and processing in the pentose phosphate pathway drives NOX-dependent tPMET. Western blot analysis demonstrated that p70S6k phosphorylation is glucose-dependent, while the phosphorylation of AKT and MAPK did not differ in the presence or absence of glucose. Further, phosphorylation of p70S6k was dependent upon NOX enzymes. Finally, glucose was required for full stimulation of p70S6k by insulin, again in a fashion prevented by NOX inhibition. Taken together, the data suggest that muscle cells have a novel glucose-sensing mechanism dependent on NADPH production and NOX activity, culminating in increased p70S6k phosphorylation.
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Affiliation(s)
- Shannon C Kelly
- Department of Biology, Saint Louis University, St. Louis, MO, United States
| | - Neej N Patel
- Department of Biology, Saint Louis University, St. Louis, MO, United States
| | - Amanda M Eccardt
- Department of Biology, Saint Louis University, St. Louis, MO, United States
| | - Jonathan S Fisher
- Department of Biology, Saint Louis University, St. Louis, MO, United States.
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64
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Abstract
Isozymes are enzymes with similar sequences that catalyze the same reaction in a given species. In Saccharomyces cerevisiae, most isozymes have major isoforms with high expression levels and minor isoforms with little expression under normal growth conditions. In a proteomic study aimed at identifying yeast protein regulated by rapamycin, we found an interesting phenomenon, that, for several metabolic enzymes, the major isozymes are downregulated while the minor isozymes are upregulated. Through enzymological and biochemical studies, we demonstrate that a rapamycin-upregulated enolase isozyme (ENO1) favors gluconeogenesis and a rapamycin-upregulated alcohol dehydrogenase isozyme (ALD4) promotes the reduction of NAD+ to NADH (instead of NADP+ to NADPH). Gene deletion study in yeast showed that the ENO1 and ALD4 are important for yeast survival under less-favorable growth conditions. Therefore, our study highlights the different metabolic needs of cells under different conditions and how nature chooses different isozymes to fit the metabolic needs.
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Affiliation(s)
- Yugang Zhang
- Howard Hughes Medical Institute, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Zhewang Lin
- Howard Hughes Medical Institute, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Miao Wang
- Howard Hughes Medical Institute, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Hening Lin
- Howard Hughes Medical Institute, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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65
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Wang S, Qiu L, Song H, Dang N. NPS - 2143 (hydrochloride) inhibits melanoma cancer cell proliferation and induces autophagy and apoptosis. Med Sci (Paris) 2018; 34 Focus issue F1:87-93. [PMID: 30403181 DOI: 10.1051/medsci/201834f115] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Melanoma is a common and aggressive skin cancer caused by the oncogenic transformation of melanocytes. NPS-2143 (hydrochloride) is a calcification drug that acts as an antagonist of the calcium-sensing receptor (CaSR) and consequently stimulates the release of parathyroid hormone. In the present work, we treated cells from the human melanoma cell line M14 to investigate the effects of NPS-2143 on melanoma cells and elucidate their underlying mechanisms. We observed that NPS-2143 inhibits the survival and proliferation of M14 cells and suppresses the migration and proliferation of M14 cells by inducing apoptosis. The Bax/Bcl‑2 ratio in M14 cells was enhanced by the NPS-2143 treatment, suggesting that the mitochondrial apoptotic pathway was activated. The expression and phosphorylation of proteins involved in the PI3K signaling pathway were altered by NPS-2143 treatment. Our data show that NPS-2143 impacts the viability and induces the apoptosis of melanoma M14 cells through its impact on the PI3K signaling pathway. It suggests that NPS-2143 could represent a promising candidate for melanoma treatment.
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Affiliation(s)
- Shumei Wang
- Department of Community Medicine, Jinan Central Hospital affiliated to Shandong University, No.105 Jiefang Road, Jinan 250013, Shandong Province, China
| | - Liyun Qiu
- Department of Pharmacy, Jinan Central Hospital affiliated to Shandong University, No.105 Jiefang Road, Jinan 250013, Shandong Province, China
| | - Haiyan Song
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, No.105 Jiefang Road, Jinan 250013, Shandong Province, China
| | - Ningning Dang
- Department of Dermatology, Jinan Central Hospital affiliated to Shandong University, No.105 Jiefang Road, Jinan 250013, Shandong Province, China
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66
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Ehyai S, Miyake T, Williams D, Vinayak J, Bayfield MA, McDermott JC. FMRP recruitment of β-catenin to the translation pre-initiation complex represses translation. EMBO Rep 2018; 19:embr.201745536. [PMID: 30361391 DOI: 10.15252/embr.201745536] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 09/12/2018] [Accepted: 09/19/2018] [Indexed: 01/07/2023] Open
Abstract
Canonical Wnt/β-catenin signaling is an essential regulator of various cellular functions throughout development and adulthood. Aberrant Wnt/β-catenin signaling also contributes to various pathologies including cancer, necessitating an understanding of cell context-dependent mechanisms regulating this pathway. Since protein-protein interactions underpin β-catenin function and localization, we sought to identify novel β-catenin interacting partners by affinity purification coupled with tandem mass spectrometry in vascular smooth muscle cells (VSMCs), where β-catenin is involved in both physiological and pathological control of cell proliferation. Here, we report novel components of the VSMC β-catenin interactome. Bioinformatic analysis of the protein networks implies potentially novel functions for β-catenin, particularly in mRNA translation, and we confirm a direct interaction between β-catenin and the fragile X mental retardation protein (FMRP). Biochemical studies reveal a basal recruitment of β-catenin to the messenger ribonucleoprotein and translational pre-initiation complex, fulfilling a translational repressor function. Wnt stimulation antagonizes this function, in part, by sequestering β-catenin away from the pre-initiation complex. In conclusion, we present evidence that β-catenin fulfills a previously unrecognized function in translational repression.
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Affiliation(s)
- Saviz Ehyai
- Department of Biology, York University, Toronto, ON, Canada.,Muscle Health Research Centre (MHRC), York University, Toronto, ON, Canada.,Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, Canada
| | - Tetsuaki Miyake
- Department of Biology, York University, Toronto, ON, Canada.,Muscle Health Research Centre (MHRC), York University, Toronto, ON, Canada.,Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, Canada
| | - Declan Williams
- Department of Chemistry, York University, Toronto, ON, Canada.,Centre for Research in Mass Spectrometry (CRMS), York University, Toronto, ON, Canada
| | - Jyotsna Vinayak
- Department of Biology, York University, Toronto, ON, Canada.,Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, Canada
| | - Mark A Bayfield
- Department of Biology, York University, Toronto, ON, Canada.,Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, Canada
| | - John C McDermott
- Department of Biology, York University, Toronto, ON, Canada .,Muscle Health Research Centre (MHRC), York University, Toronto, ON, Canada.,Centre for Research in Biomolecular Interactions (CRBI), York University, Toronto, ON, Canada.,Department of Chemistry, York University, Toronto, ON, Canada.,Centre for Research in Mass Spectrometry (CRMS), York University, Toronto, ON, Canada
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67
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High glucose forces a positive feedback loop connecting ErbB4 expression and mTOR/S6K pathway to aggravate the formation of tau hyperphosphorylation in differentiated SH-SY5Y cells. Neurobiol Aging 2018; 67:171-180. [DOI: 10.1016/j.neurobiolaging.2018.03.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 02/14/2018] [Accepted: 03/17/2018] [Indexed: 01/04/2023]
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68
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Zurita Rendón O, Fredrickson EK, Howard CJ, Van Vranken J, Fogarty S, Tolley ND, Kalia R, Osuna BA, Shen PS, Hill CP, Frost A, Rutter J. Vms1p is a release factor for the ribosome-associated quality control complex. Nat Commun 2018; 9:2197. [PMID: 29875445 PMCID: PMC5989216 DOI: 10.1038/s41467-018-04564-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 05/03/2018] [Indexed: 12/02/2022] Open
Abstract
Eukaryotic cells employ the ribosome-associated quality control complex (RQC) to maintain homeostasis despite defects that cause ribosomes to stall. The RQC comprises the E3 ubiquitin ligase Ltn1p, the ATPase Cdc48p, Rqc1p, and Rqc2p. Upon ribosome stalling and splitting, the RQC assembles on the 60S species containing unreleased peptidyl-tRNA (60S:peptidyl–tRNA). Ltn1p and Rqc1p facilitate ubiquitination of the incomplete nascent chain, marking it for degradation. Rqc2p stabilizes Ltn1p on the 60S and recruits charged tRNAs to the 60S to catalyze elongation of the nascent protein with carboxy-terminal alanine and threonine extensions (CAT tails). By mobilizing the nascent chain, CAT tailing can expose lysine residues that are hidden in the exit tunnel, thereby supporting efficient ubiquitination. If the ubiquitin–proteasome system is overwhelmed or unavailable, CAT-tailed nascent chains can aggregate in the cytosol or within organelles like mitochondria. Here we identify Vms1p as a tRNA hydrolase that releases stalled polypeptides engaged by the RQC. The ribosome-associated quality control complex (RQC) functions to disassemble stalled ribosomes. Here the authors find that the tRNA hydrolase Vms1 is involved in the release of nascent peptide from stalled ribosomes.
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Affiliation(s)
- Olga Zurita Rendón
- Howard Hughes Medical Institute, Chevy Chase, MD, 20815-6789, USA.,Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Eric K Fredrickson
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Conor J Howard
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA.,California Institute for Quantitative Biomedical Research, San Francisco, CA, 94158, USA
| | - Jonathan Van Vranken
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Sarah Fogarty
- Howard Hughes Medical Institute, Chevy Chase, MD, 20815-6789, USA.,Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Neal D Tolley
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, 84112, USA
| | - Raghav Kalia
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA.,Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA.,California Institute for Quantitative Biomedical Research, San Francisco, CA, 94158, USA
| | - Beatriz A Osuna
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA.,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, 94158, USA
| | - Peter S Shen
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Christopher P Hill
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Adam Frost
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA. .,Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA. .,California Institute for Quantitative Biomedical Research, San Francisco, CA, 94158, USA. .,Chan Zuckerberg Biohub, San Francisco, CA, 94158, USA.
| | - Jared Rutter
- Howard Hughes Medical Institute, Chevy Chase, MD, 20815-6789, USA. .,Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA.
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69
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Dong X, Zhou Z, Wang L, Saremi B, Helmbrecht A, Wang Z, Loor J. Increasing the availability of threonine, isoleucine, valine, and leucine relative to lysine while maintaining an ideal ratio of lysine:methionine alters mammary cellular metabolites, mammalian target of rapamycin signaling, and gene transcription. J Dairy Sci 2018; 101:5502-5514. [DOI: 10.3168/jds.2017-13707] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 02/05/2018] [Indexed: 12/21/2022]
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70
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Argueta C, Kashyap T, Klebanov B, Unger TJ, Guo C, Harrington S, Baloglu E, Lee M, Senapedis W, Shacham S, Landesman Y. Selinexor synergizes with dexamethasone to repress mTORC1 signaling and induce multiple myeloma cell death. Oncotarget 2018; 9:25529-25544. [PMID: 29876006 PMCID: PMC5986633 DOI: 10.18632/oncotarget.25368] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/25/2018] [Indexed: 12/12/2022] Open
Abstract
Multiple myeloma (MM) is a plasma cell neoplasm that results in over 11,000 deaths in the United States annually. The backbone therapy for the treatment of MM patients almost always includes combinations with corticosteroids such as dexamethasone (DEX). We found that DEX in combination with selinexor, an inhibitor of exportin-1 (XPO1) activity, synergistically inhibits the mTOR pathway and subsequently promotes cell death in MM cells. Specifically, we show that selinexor induces the expression of the glucocorticoid receptor (GR) and when combined with dexamethasone increases GR transcriptional activity. Moreover, we found that key downstream targets of the mTOR pathway are deregulated by the combination and identified a mechanism in which GR enhances the expression of REDD1 in GR positive cells while suppressing mTOR activity and cell viability. While the single agent activity of selinexor in MM cells appears to be GR-independent, synergy with DEX depends on GR expression. These data suggest that patients with tumor cells that are GR positive will benefit substantially from the combination. The current findings are consistent with the beneficial therapeutic outcome in patients with MM when treated with the combination of selinexor and DEX. In addition, they provide a rationale for testing GR and REDD1 as predictive and prognostic markers of response, respectively, for patients treated with this beneficial combination.
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Affiliation(s)
| | | | | | | | - Cathy Guo
- Karyopharm Therapeutics Inc, Newton, MA 02459, USA
| | | | | | - Margaret Lee
- Karyopharm Therapeutics Inc, Newton, MA 02459, USA
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71
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Hamdi AM, Jiang ZZ, Guerram M, Yousef BA, Hassan HM, Ling JW, Zhang LY. Biochemical and computational evaluation of Triptolide-induced cytotoxicity against NSCLC. Biomed Pharmacother 2018; 103:1557-1566. [PMID: 29864943 DOI: 10.1016/j.biopha.2018.04.198] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 04/26/2018] [Accepted: 04/29/2018] [Indexed: 12/14/2022] Open
Abstract
Triptolide is the major bioactive component isolated from the Chinese Medicinal plant Tripterygium wilfordii. Despite the growing interest and the plethora of reports discussing the pharmacological activity of this diterpenoid, no clear consensus regarding its cellular targets and full mechanism of action has been reached. In the present work, a combined in vitro and in silico approach was used to evaluate the biological activity of Triptolide on Non-small cell lung cancer (NSCLC). In vitro, Triptolide treatment induced apoptosis in NSCLC cell lines and down-regulated the phosphorylation of AKT, mTOR, and p70S6K. Triptolide also impacted cellular glycolysis as well as the antioxidant response through the impairment of glucose utilization, HKII, glutathione, and NRF2 levels. Molecular docking results examined the possible interactions between Triptolide and AKT and predicted an allosteric binding to AKT-1 structure. Molecular dynamics simulations were further used to evaluate the stability of the complex formed by Triptolide's best conformer and AKT. These findings provide an insightful approach to the anticancer effect of Triptolide against NSCLC and highlight a possible new role for AKT/mTOR HKII inhibition.
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Affiliation(s)
- Aida M Hamdi
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China
| | - Zhen-Zhou Jiang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China; Key Laboratory of Drug Quality Control and Pharmacovigilance, China Pharmaceutical University, Ministry of Education, Nanjing, China
| | - Mounia Guerram
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China
| | - Bashir A Yousef
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China; Department of Pharmacology, Faculty of Pharmacy, University of Khartoum, Khartoum, Sudan
| | - Hozeifa M Hassan
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China
| | - Jia-Wei Ling
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China
| | - Lu-Yong Zhang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing, China; Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing, China; Center for Drug Screening and Pharmacodynamics Evaluation, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.
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72
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Speacht TL, Krause AR, Steiner JL, Lang CH, Donahue HJ. Combination of hindlimb suspension and immobilization by casting exaggerates sarcopenia by stimulating autophagy but does not worsen osteopenia. Bone 2018; 110:29-37. [PMID: 29414598 DOI: 10.1016/j.bone.2018.01.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 01/14/2018] [Accepted: 01/20/2018] [Indexed: 12/20/2022]
Abstract
Astronauts in space experience a unique environment that causes the concomitant loss of bone and muscle. However, the interaction between these tissues and how osteopenia and sarcopenia affect each other is unclear. We explored this relationship by exaggerating unloading-induced muscle loss using a unilateral casting model in conjunction with hindlimb suspension (HLS). Five-month-old, male C57Bl/6J mice subjected to HLS for 2 weeks displayed a significant decrease in gastrocnemius and quadriceps weight (-9-10%), with a two-fold greater decrease in muscle mass observed in the HLS + casted limb. However, muscle from casted limbs had a higher rate of protein synthesis (+16%), compared to HLS alone, with coordinated increases in S6K1 (+50%) and 4E-BP1 (+110%) phosphorylation. Increased protein content for surrogate markers of autophagy, including LC3-II (+75%), Atg7 (+10%), and Atg5-12 complex (+20%) was only detected in muscle from the casted limb. In proximal tibias, HLS resulted in significant decreases in bone volume fraction (-24% vs -8%), trabecular number (-6% vs +0.3%), trabecular thickness (-10% vs -2%), and trabecular spacing (+8.4% vs +2%) compared to ground controls. There was no further bone loss in casted limbs compared to HLS alone. In tibia midshafts, HLS resulted in decreased total area (-2% vs +1%) and increased bone mineral density (+1% vs -0.3%) compared to ground controls. Cortical bone from casted limbs showed an increase in cortical thickness (+9% vs +2%) and cortical area/total area (+1% vs -0.6%) compared to HLS alone. Our results suggest that casting exacerbates unloading-induced muscle loss via activation of autophagy. Casting did not exacerbate bone loss suggesting that the unloading-induced loss of muscle and bone can be temporally dissociated and the effect of reduced muscle activity plays a relatively minor role compared to reduced load bearing on trabecular bone structure.
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Affiliation(s)
- Toni L Speacht
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University, College of Medicine, Hershey, PA 17033, United States
| | - Andrew R Krause
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University, College of Medicine, Hershey, PA 17033, United States
| | - Jennifer L Steiner
- Department of Cellular and Molecular Physiology, The Pennsylvania State University, College of Medicine, Hershey, PA 17033, United States
| | - Charles H Lang
- Department of Cellular and Molecular Physiology, The Pennsylvania State University, College of Medicine, Hershey, PA 17033, United States
| | - Henry J Donahue
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University, College of Medicine, Hershey, PA 17033, United States; Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States.
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Harvey RF, Smith TS, Mulroney T, Queiroz RML, Pizzinga M, Dezi V, Villenueva E, Ramakrishna M, Lilley KS, Willis AE. Trans-acting translational regulatory RNA binding proteins. WILEY INTERDISCIPLINARY REVIEWS. RNA 2018; 9:e1465. [PMID: 29341429 PMCID: PMC5947564 DOI: 10.1002/wrna.1465] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/31/2017] [Accepted: 12/04/2017] [Indexed: 12/13/2022]
Abstract
The canonical molecular machinery required for global mRNA translation and its control has been well defined, with distinct sets of proteins involved in the processes of translation initiation, elongation and termination. Additionally, noncanonical, trans-acting regulatory RNA-binding proteins (RBPs) are necessary to provide mRNA-specific translation, and these interact with 5' and 3' untranslated regions and coding regions of mRNA to regulate ribosome recruitment and transit. Recently it has also been demonstrated that trans-acting ribosomal proteins direct the translation of specific mRNAs. Importantly, it has been shown that subsets of RBPs often work in concert, forming distinct regulatory complexes upon different cellular perturbation, creating an RBP combinatorial code, which through the translation of specific subsets of mRNAs, dictate cell fate. With the development of new methodologies, a plethora of novel RNA binding proteins have recently been identified, although the function of many of these proteins within mRNA translation is unknown. In this review we will discuss these methodologies and their shortcomings when applied to the study of translation, which need to be addressed to enable a better understanding of trans-acting translational regulatory proteins. Moreover, we discuss the protein domains that are responsible for RNA binding as well as the RNA motifs to which they bind, and the role of trans-acting ribosomal proteins in directing the translation of specific mRNAs. This article is categorized under: RNA Interactions with Proteins and Other Molecules > RNA-Protein Complexes Translation > Translation Regulation Translation > Translation Mechanisms.
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Affiliation(s)
| | - Tom S. Smith
- Cambridge Centre for Proteomics, Department of BiochemistryUniversity of CambridgeCambridgeUK
| | | | - Rayner M. L. Queiroz
- Cambridge Centre for Proteomics, Department of BiochemistryUniversity of CambridgeCambridgeUK
| | | | | | - Eneko Villenueva
- Cambridge Centre for Proteomics, Department of BiochemistryUniversity of CambridgeCambridgeUK
| | | | - Kathryn S. Lilley
- Cambridge Centre for Proteomics, Department of BiochemistryUniversity of CambridgeCambridgeUK
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Abstract
Background Ovarian cancer is one of the most fatal gynecologic malignancies, with most patients diagnosed at the late stage due to insidious onset and lack of early onset specific symptoms. Previous studies have implied that isoliquiritigenin (ILQ) is a promising chemopreventive agent against oral cancer. Aim This study aimed to investigate effects of ILQ and elucidate the related mechanism. Materials and methods Ovarian cancer cell lines, SKOV3 and OVCAR3, were treated with various concentrations of ILQ to detect the dose-dependent effects of ILQ and select the suitable concentration. CCK8 assay and clone formation efficiency assays were used to detect viability and proliferation. The cell migration, invasion, and apoptosis were evaluated by wound healing assays, transwell, and flow cytometry assays. The expression of apoptosis-related proteins (Caspase-3, Caspase3-p17, Bcl-2, Bax, and Bim) and related-signaling pathway proteins were also detected by Western blot. Results It was observed that the treatment of ILQ inhibited the survival and proliferation of SKOV3 and OVCAR3 cells. ILQ treatment inhibited migration and invasion, and induced apoptosis in SKOV3 and OVCAR3 cells. Also, the ILQ treatment increased the Bax/Bcl-2 ratio in SKOV3 and OVCAR3 cells, suggesting that a mitochondrial apoptotic pathway was triggered. It was also observed that, after treated with ILQ, the phosphorylated form of Akt and mTOR decreased and the expression of GSK3β increased, while P70/S6K decreased. ILQ treatment also decreased the expression of Wnt3a and, therefore, caused the decrease of phosphorylated ERK. ILQ also suppressed the PI3K/Akt/mTOR pathway by reduced the expression level of p-Akt, p-mTOR, P70/S6K and Cyclin D1 in Ishikawa and ES-2 cells. Conclusion The data suggested that ILQ inhibited viability, proliferation, and invasion, and induced apoptosis of SKOV3 and OVCAR3 cells through the PI3K/Akt/mTOR pathway. Together, the data revealed that ILQ treatment may be used as a novel strategy for ovarian cancer therapy.
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Affiliation(s)
- Nan Li
- Department of Gynecology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Liang Yang
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Xinna Deng
- Department of Oncology & Immunotherapy, Hebei General Hospital, Shijiazhuang, People's Republic of China
| | - Yanan Sun
- Department of Obstetrics and Gynecology, Bethune International Peace Hospital of PLA, Shijiazhuang, People's Republic of China
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Tee AR. The Target of Rapamycin and Mechanisms of Cell Growth. Int J Mol Sci 2018; 19:ijms19030880. [PMID: 29547541 PMCID: PMC5877741 DOI: 10.3390/ijms19030880] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 01/09/2023] Open
Abstract
Mammalian target of rapamycin (mTOR, now referred to as mechanistic target of rapamycin) is considered as the master regulator of cell growth. A definition of cell growth is a build-up of cellular mass through the biosynthesis of macromolecules. mTOR regulation of cell growth and cell size is complex, involving tight regulation of both anabolic and catabolic processes. Upon a growth signal input, mTOR enhances a range of anabolic processes that coordinate the biosynthesis of macromolecules to build cellular biomass, while restricting catabolic processes such as autophagy. mTOR is highly dependent on the supply of nutrients and energy to promote cell growth, where the network of signalling pathways that influence mTOR activity ensures that energy and nutrient homeostasis are retained within the cell as they grow. As well as maintaining cell size, mTOR is fundamental in the regulation of organismal growth. This review examines the complexities of how mTOR complex 1 (mTORC1) enhances the cell’s capacity to synthesis de novo proteins required for cell growth. It also describes the discovery of mTORC1, the complexities of cell growth signalling involving nutrients and energy supply, as well as the multifaceted regulation of mTORC1 to orchestrate ribosomal biogenesis and protein translation.
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Affiliation(s)
- Andrew R Tee
- Division of Cancer and Genetics, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
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Karlik E, Gözükırmızı N. Evaluation of Barley lncRNAs Expression Analysis in Salinity Stress. RUSS J GENET+ 2018. [DOI: 10.1134/s1022795418020096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Phenylalanine regulates initiation of digestive enzyme mRNA translation in pancreatic acinar cells and tissue segments in dairy calves. Biosci Rep 2018; 38:BSR20171189. [PMID: 29263147 PMCID: PMC5784178 DOI: 10.1042/bsr20171189] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 12/14/2017] [Accepted: 12/20/2017] [Indexed: 01/13/2023] Open
Abstract
As new nutritional strategies for ruminant are designed to change production efficiency by improving the supply of rumen protect protein, lipid, and even starch, the digestive system must fit to utilize these increased nutrient supplies, especially the pancreas. The objective of this study was to investigate the effects of phenylalanine (Phe) on digestive enzymes synthesis or secretion and cellular signaling in pancreatic acinar (PA) cells of dairy calves. The PA cells isolated from fresh pancreas of dairy calves, and cultured in completed RIPA 1640 medium with no fetal serum but 0, 0.15 and 0.45 mM Phe at 37°C in CO2 incubator for 120 min. The pancreatic tissue segments (PTS) was cut approximately 2 × 2 mm from the fresh pancreas, and incubated in oxygenated Krebs-Ringer bicarbonate (KRB) buffer containing 0 or 0.35 mM Phe at 39°C for 180 min, and the samples were collected every 60 min after incubation. In PA cells, Phe increased (P < 0.05) the α-amylase secretion and mRNA expression, the phosphorylation of ribosomal protein S6 kinase 1 (S6K1) and eukaryotic initiation factor 4E binding protein 1 (4EBP1). In PTS, the Phe increased (P < 0.05) α-amylase and trypsin synthesis, secretion and mRNA expression, as well as the phosphorylation of S6K1 and 4EBP1. Conclusively, these results suggested that Phe regulates the synthesis or secretion of α-amylase, trypsin and lipase through mRNA translation initiation factors – S6K1 and 4EBP1.
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Rad E, Murray JT, Tee AR. Oncogenic Signalling through Mechanistic Target of Rapamycin (mTOR): A Driver of Metabolic Transformation and Cancer Progression. Cancers (Basel) 2018; 10:cancers10010005. [PMID: 29301334 PMCID: PMC5789355 DOI: 10.3390/cancers10010005] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 12/27/2017] [Accepted: 12/28/2017] [Indexed: 12/29/2022] Open
Abstract
Throughout the years, research into signalling pathways involved in cancer progression has led to many discoveries of which mechanistic target of rapamycin (mTOR) is a key player. mTOR is a master regulator of cell growth control. mTOR is historically known to promote cell growth by enhancing the efficiency of protein translation. Research in the last decade has revealed that mTOR’s role in promoting cell growth is much more multifaceted. While mTOR is necessary for normal human physiology, cancer cells take advantage of mTOR signalling to drive their neoplastic growth and progression. Oncogenic signal transduction through mTOR is a common occurrence in cancer, leading to metabolic transformation, enhanced proliferative drive and increased metastatic potential through neovascularisation. This review focuses on the downstream mTOR-regulated processes that are implicated in the “hallmarks” of cancer with focus on mTOR’s involvement in proliferative signalling, metabolic reprogramming, angiogenesis and metastasis.
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Affiliation(s)
- Ellie Rad
- Division of Cancer and Genetics, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland.
| | - James T Murray
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland.
| | - Andrew R Tee
- Division of Cancer and Genetics, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
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Kristina Parr M, Müller-Schöll A. Pharmacology of doping agents—mechanisms promoting muscle hypertrophy. AIMS MOLECULAR SCIENCE 2018. [DOI: 10.3934/molsci.2018.2.131] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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80
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mTOR Signaling Pathway and Protein Synthesis: From Training to Aging and Muscle Autophagy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1088:139-151. [PMID: 30390251 DOI: 10.1007/978-981-13-1435-3_7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In muscle tissue there is a balance between the processes muscle synthesis and degradation. The mammalian target of rapamycin (mTOR) signaling pathway plays a critical role in regulating protein synthesis in order to maintain muscular protein turnover and trophism. Studies have shown that both down- and upregulation mechanisms are involved in this process in a manner dependent on stimulus and cellular conditions. Additionally, mTOR signaling has recently been implicated in several physiological conditions related to cell survival, such as self-digestion (autophagy), energy production, and the preservation of cellular metabolic balance over the lifespan. Here we briefly describe the mTOR structure and its regulatory protein synthesis pathway. Furthermore, the role of mTOR protein in autophagy, aging, and mitochondrial function in muscle tissue is presented.
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81
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Wen J, Fang F, Guo SH, Zhang Y, Peng XL, Sun WM, Wei XR, He JS, Hung T. Amyloid β-Derived Diffusible Ligands (ADDLs) Induce Abnormal Autophagy Associated with Aβ Aggregation Degree. J Mol Neurosci 2017; 64:162-174. [DOI: 10.1007/s12031-017-1015-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 12/03/2017] [Indexed: 11/25/2022]
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82
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Anozie UC, Dalhaimer P. Molecular links among non-biodegradable nanoparticles, reactive oxygen species, and autophagy. Adv Drug Deliv Rev 2017; 122:65-73. [PMID: 28065863 DOI: 10.1016/j.addr.2017.01.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 01/02/2017] [Accepted: 01/03/2017] [Indexed: 12/15/2022]
Abstract
For nanoparticles to be successful in combating diseases in the clinic in the 21st century and beyond, they must localize to target areas of the body and avoid damaging non-target, healthy tissues. Both soft and stiff, bio-degradable and non-biodegradable nanoparticles are anticipated to be used to this end. It has been shown that stiff, non-biodegradable nanoparticles cause reactive oxygen species (ROS) generation and autophagy in a variety of cell lines in vitro. Both responses can lead to significant remodeling of the cytosol and even apoptosis. Thus these are crucial cellular functions to understand. Improved assays have uncovered crucial roles of the Akt/mTOR signaling pathway in both ROS generation and autophagy initiation after cells have internalized stiff, non-biodegradable nanoparticles over varying geometries in culture. Of particular - yet unresolved - interest is how these nanoparticles cause the activation of these pathways. This article reviews the most recent advances in nanoparticle generation of ROS and autophagy initiation with a focus on stiff, non-biodegradable technologies. We provide experimental guidelines to the reader for fleshing out the effects of their nanoparticles on the above pathways with the goal of tuning nanoparticle design.
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83
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Jackson AL, Sun W, Kilgore J, Guo H, Fang Z, Yin Y, Jones HM, Gilliam TP, Zhou C, Bae-Jump VL. Phenformin has anti-tumorigenic effects in human ovarian cancer cells and in an orthotopic mouse model of serous ovarian cancer. Oncotarget 2017; 8:100113-100127. [PMID: 29245964 PMCID: PMC5725006 DOI: 10.18632/oncotarget.22012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 09/30/2017] [Indexed: 01/07/2023] Open
Abstract
Obesity and diabetes have been associated with increased risk and worse outcomes in ovarian cancer (OC). The biguanide metformin is used in the treatment of type 2 diabetes and is also believed to have anti-tumorigenic benefits. Metformin is highly hydrophilic and requires organic cation transporters (OCTs) for entry into human cells. Phenformin, another biguanide, was taken off the market due to an increased risk of lactic acidosis over metformin. However, phenformin is not reliant on transporters for cell entry; and thus, may have increased potency as both an anti-diabetic and anti-tumorigenic agent than metformin. Thus, our goal was to evaluate the effect of phenformin on established OC cell lines, primary cultures of human OC cells and in an orthotopic mouse model of high grade serous OC. In three OC cell lines, phenformin significantly inhibited cellular proliferation, induced cell cycle G1 arrest and apoptosis, caused cellular stress, inhibited adhesion and invasion, and activation of AMPK and inhibition of the mTOR pathway. Phenformin also exerted anti-proliferative effects in seven primary cell cultures of human OC. Lastly, phenformin inhibited tumor growth in an orthotopic mouse model of serous OC, coincident with decreased Ki-67 staining and phosphorylated-S6 expression and increased expression of caspase 3 and phosphorylated-AMPK. Our findings demonstrate that phenformin has anti-tumorigenic effects in OC as previously demonstrated by metformin but it is yet to be determined if it is superior to metformin for the potential treatment of this disease.
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Affiliation(s)
- Amanda L. Jackson
- Division of Gynecologic Oncology, University of Cincinnati, Cincinnati, OH, USA
| | - Wenchuan Sun
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Joshua Kilgore
- Houston Methodist Gynecologic Oncology Associates, Houston, TX, USA
| | - Hui Guo
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Gynecologic Oncology, Shandong Cancer Hospital & Institute, Jinan, P.R. China
| | - Ziwei Fang
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, P.R. China
| | - Yajie Yin
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Hannah M. Jones
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Timothy P. Gilliam
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Chunxiao Zhou
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Victoria L. Bae-Jump
- Division of Gynecologic Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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84
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BRD7 regulates the insulin-signaling pathway by increasing phosphorylation of GSK3β. Cell Mol Life Sci 2017; 75:1857-1869. [PMID: 29127434 DOI: 10.1007/s00018-017-2711-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/01/2017] [Accepted: 11/03/2017] [Indexed: 10/18/2022]
Abstract
Reduced hepatic expression levels of bromodomain-containing protein 7 (BRD7) have been suggested to play a role in the development of glucose intolerance in obesity. However, the molecular mechanism by which BRD7 regulates glucose metabolism has remained unclear. Here, we show that BRD7 increases phosphorylation of glycogen synthase kinase 3β (GSK3β) in response to activation of the insulin receptor-signaling pathway shortly after insulin stimulation and the nutrient-sensing pathway after feeding. BRD7 mediates phosphorylation of GSK3β at the Serine 9 residue and this effect on GSK3β occurs even in the absence of AKT activity. Using both in vitro and in vivo models, we further demonstrate that BRD7 mediates phosphorylation of ribosomal protein S6 kinase (S6K) and leads to increased phosphorylation of the eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) and, therefore, relieves its inhibition of the eukaryotic translation initiation factor 4E (eIF4E). However, the increase in phosphorylation of 4E-BP1 with BRD7 overexpression is blunted in the absence of AKT activity. In addition, using liver-specific BRD7 knockout (LBKO) mice, we show that BRD7 is required for mTORC1 activity on its downstream molecules. These findings show a novel basis for understanding the molecular dynamics of glucose metabolism and suggest the unique function of BRD7 in the regulation of glucose homeostasis.
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85
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Briggs JW, Ren L, Chakrabarti KR, Tsai YC, Weissman AM, Hansen RJ, Gustafson DL, Khan YA, Dinman JD, Khanna C. Activation of the unfolded protein response in sarcoma cells treated with rapamycin or temsirolimus. PLoS One 2017; 12:e0185089. [PMID: 28926611 PMCID: PMC5605117 DOI: 10.1371/journal.pone.0185089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/06/2017] [Indexed: 01/21/2023] Open
Abstract
Activation of the unfolded protein response (UPR) in eukaryotic cells represents an evolutionarily conserved response to physiological stress. Here, we report that the mTOR inhibitors rapamycin (sirolimus) and structurally related temsirolimus are capable of inducing UPR in sarcoma cells. However, this effect appears to be distinct from the classical role for these drugs as mTOR inhibitors. Instead, we detected these compounds to be associated with ribosomes isolated from treated cells. Specifically, temsirolimus treatment resulted in protection from chemical modification of several rRNA residues previously shown to bind rapamycin in prokaryotic cells. As an application for these findings, we demonstrate maximum tumor cell growth inhibition occurring only at doses which induce UPR and which have been shown to be safely achieved in human patients. These results are significant because they challenge the paradigm for the use of these drugs as anticancer agents and reveal a connection to UPR, a conserved biological response that has been implicated in tumor growth and response to therapy. As a result, eIF2 alpha phosphorylation and Xbp-1 splicing may serve as useful biomarkers of treatment response in future clinical trials using rapamycin and rapalogs.
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Affiliation(s)
- Joseph W. Briggs
- Tumor Metastasis Biology Section, Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
| | - Ling Ren
- Tumor Metastasis Biology Section, Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Kristi R. Chakrabarti
- Tumor Metastasis Biology Section, Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Yien Che Tsai
- Laboratory of Protein Dynamics and Signaling, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland, United States of America
| | - Allan M. Weissman
- Laboratory of Protein Dynamics and Signaling, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland, United States of America
| | - Ryan J. Hansen
- Colorado State University Flint Animal Cancer Center, Fort Collins, Colorado, United States of America
| | - Daniel L. Gustafson
- Colorado State University Flint Animal Cancer Center, Fort Collins, Colorado, United States of America
| | - Yousuf A. Khan
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Jonathan D. Dinman
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, United States of America
| | - Chand Khanna
- Tumor Metastasis Biology Section, Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, United States of America
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Zhang J, Xu H, Zhou X, Li Y, Liu T, Yin X, Zhang B. Role of metformin in inhibiting estrogen-induced proliferation and regulating ERα and ERβ expression in human endometrial cancer cells. Oncol Lett 2017; 14:4949-4956. [PMID: 29085506 DOI: 10.3892/ol.2017.6877] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 05/05/2017] [Indexed: 02/07/2023] Open
Abstract
Diabetes mellitus (DM) is an important factor that contributes to the development of type I endometrial cancer (EC). Previous studies have demonstrated that metformin decreases mortality and risk of neoplasms in patients with DM. Since estrogen and estrogen receptor (ER) expression has been associated with the development of EC, the present study aimed to investigate the effects of metformin on cell proliferation and ER expression in EC cell lines that are sensitive to estrogen. The viability and proliferation of Ishikawa and HEC-1-A cells were measured following treatment with metformin and/or a 5' AMP-activated protein kinase (AMPK) inhibitor (compound C) with or without treatment with estradiol (E2). In addition, the levels of ERα, ERβ, AMPK, ribosomal protein S6 kinase β-1 (p70S6K), myc proto-oncogene protein (c-myc) and proto-oncogene c-fos (c-fos) were measured following treatment. Metformin significantly decreased E2-stimulated cell proliferation; an effect that was rescued in the presence of compound C. Metformin treatment markedly increased the phosphorylation of AMPK while decreasing p70S6K phosphorylation, indicating that metformin exerts its effects through stimulation of AMPK and subsequent inhibition of the mammalian target of rapamycin (mTOR) signaling pathway. In addition, metformin significantly inhibited ERα expression while increasing ERβ expression, whereas treatment with compound C reversed these effects. Reverse transcription-quantitative polymerase chain reaction analysis demonstrated that c-fos and c-myc expression were attenuated by metformin, an effect that was rescued in the presence of compound C. Therefore, metformin regulates the expression of ERs, and inhibits estrogen-mediated proliferation of human EC cells through the activation of AMPK and subsequent inhibition of the mTOR signaling pathway.
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Affiliation(s)
- Jingbo Zhang
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu 221004, P.R. China
| | - Hui Xu
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu 221004, P.R. China
| | - Xueyan Zhou
- School of Pharmacy, Xuzhou Medical College, Xuzhou, Jiangsu 221004, P.R. China
| | - Yanyu Li
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu 221004, P.R. China
| | - Tong Liu
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu 221004, P.R. China
| | - Xiaoxing Yin
- School of Pharmacy, Xuzhou Medical College, Xuzhou, Jiangsu 221004, P.R. China
| | - Bei Zhang
- Department of Obstetrics and Gynecology, Xuzhou Central Hospital, Xuzhou, Jiangsu 221004, P.R. China
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87
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Antofine, a natural phenanthroindolizidine alkaloid, suppresses angiogenesis via regulation of AKT/mTOR and AMPK pathway in endothelial cells and endothelial progenitor cells derived from mouse embryonic stem cells. Food Chem Toxicol 2017; 107:201-207. [DOI: 10.1016/j.fct.2017.06.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 05/18/2017] [Accepted: 06/22/2017] [Indexed: 11/17/2022]
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88
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Expression and purification of p70ΔCT 104 S6 K, a 72 kDa c-terminal truncated p70S6 kinase-GST fusion protein in bacterial expression system. Int J Biol Macromol 2017; 102:625-629. [DOI: 10.1016/j.ijbiomac.2017.04.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 04/13/2017] [Accepted: 04/17/2017] [Indexed: 11/21/2022]
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89
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Mine S, Hishima T, Suganuma A, Fukumoto H, Sato Y, Kataoka M, Sekizuka T, Kuroda M, Suzuki T, Hasegawa H, Fukayama M, Katano H. Interleukin-6-dependent growth in a newly established plasmablastic lymphoma cell line and its therapeutic targets. Sci Rep 2017; 7:10188. [PMID: 28860565 PMCID: PMC5579229 DOI: 10.1038/s41598-017-10684-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 08/14/2017] [Indexed: 12/26/2022] Open
Abstract
Plasmablastic lymphoma (PBL) is a rare, highly aggressive subtype of non-Hodgkin lymphoma with plasma-cell differentiation occurring typically in immune-suppressed patients such as those with AIDS. This study reports the establishment and characterization of a new cell line, PBL-1, derived from a patient with AIDS-associated PBL. Morphological assessment of PBL-1 indicated plasma-cell differentiation with a CD20(-) CD38(+) CD138(+) immunophenotype and IgH/c-myc translocation. The cell line harbours Epstein-Barr virus, but a 52.7-kbp length defect was identified in its genome, resulting in no expression of viral microRNAs encoded in the BamHI-A Rightward Transcript region. Importantly, supplementation of culture medium with >5 ng/mL of interleukin-6 (IL-6) was required for PBL-1 growth. Starvation of IL-6 or addition of tocilizumab, an inhibitory antibody for the IL-6 receptor, induced apoptosis of PBL-1. Transduction of IL-6 into PBL-1 by lentivirus vector induced autologous growth without IL-6 supplementation of culture medium. These data indicate the IL-6 dependency of PBL-1 for proliferation and survival. mTOR inhibitors induced cell death effectively, suggesting mTOR in the IL-6 signalling pathway is a potential therapeutic target for PBL. This established PBL cell line will be a useful tool to further understand the pathophysiology of PBL and aid the future development of PBL treatment.
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Affiliation(s)
- Sohtaro Mine
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan.,Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tsunekazu Hishima
- Department of Pathology, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan
| | - Akihiko Suganuma
- Department of Infectious Diseases, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan
| | - Hitomi Fukumoto
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Yuko Sato
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Michiyo Kataoka
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tsuyoshi Sekizuka
- Pathogen Genomic Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Makoto Kuroda
- Pathogen Genomic Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hideki Hasegawa
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masashi Fukayama
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Harutaka Katano
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan.
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90
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Chen T, van Steensel B. Comprehensive analysis of nucleocytoplasmic dynamics of mRNA in Drosophila cells. PLoS Genet 2017; 13:e1006929. [PMID: 28771467 PMCID: PMC5557608 DOI: 10.1371/journal.pgen.1006929] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 08/15/2017] [Accepted: 07/17/2017] [Indexed: 01/14/2023] Open
Abstract
Eukaryotic mRNAs undergo a cycle of transcription, nuclear export, and degradation. A major challenge is to obtain a global, quantitative view of these processes. Here we measured the genome-wide nucleocytoplasmic dynamics of mRNA in Drosophila cells by metabolic labeling in combination with cellular fractionation. By mathematical modeling of these data we determined rates of transcription, export and cytoplasmic decay for 5420 genes. We characterized these kinetic rates and investigated links with mRNA features, RNA-binding proteins (RBPs) and chromatin states. We found prominent correlations between mRNA decay rate and transcript size, while nuclear export rates are linked to the size of the 3'UTR. Transcription, export and decay rates are each associated with distinct spectra of RBPs. Specific classes of genes, such as those encoding cytoplasmic ribosomal proteins, exhibit characteristic combinations of rate constants, suggesting modular control. Binding of splicing factors is associated with faster rates of export, and our data suggest coordinated regulation of nuclear export of specific functional classes of genes. Finally, correlations between rate constants suggest global coordination between the three processes. Our approach provides insights into the genome-wide nucleocytoplasmic kinetics of mRNA and should be generally applicable to other cell systems. All mRNAs start from production in the nucleus, undergo exportation through nuclear pores and finally are degraded in the cytoplasm. A comprehensive characterization of the kinetic rates of all mRNAs is an important prerequisite for a global understanding of the regulation of the transcriptome and the cell. By conducting a time-series experiment and building a mathematical model, we trace the dynamics of mRNAs from the nucleus to the cytoplasm and determine the rates at each kinetic step at transcriptome-wide level. This information allows us to associate mRNA kinetic rates with a wealth of biological features and made some intriguing discoveries. We show mRNA decay is positively linked to transcript length while mRNA export is negatively linked to the length of the 3' UTR. We show binding of splicing factors is associated with faster rates of mRNA export. We provide evidence for global coordination between nuclear export an decay of mRNA. We show genes sharing specific functions tend to have similar nucleoplasmic kinetics, in which ribosomal proteins possessing special kinetic features exclusively stand out. Altogether, our integrated approach to quantitatively determine the rates of kinetic steps on a gene-by-gene basis provides a blueprint to obtain the global understanding of RNA regulation.
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Affiliation(s)
- Tao Chen
- Division of Gene Regulation, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Bas van Steensel
- Division of Gene Regulation, Netherlands Cancer Institute, Amsterdam, The Netherlands
- * E-mail:
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91
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Shimizu T, Kamel WA, Yamaguchi-Iwai S, Fukuchi Y, Muto A, Saya H. Calcitriol exerts an anti-tumor effect in osteosarcoma by inducing the endoplasmic reticulum stress response. Cancer Sci 2017. [PMID: 28643892 PMCID: PMC5581526 DOI: 10.1111/cas.13304] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Osteosarcoma is the most common type of primary bone tumor, and novel therapeutic approaches for this disease are urgently required. To identify effective agents, we screened a panel of Food and Drug Administration (FDA)-approved drugs in AXT cells, our newly established mouse osteosarcoma line, and identified calcitriol as a candidate compound with therapeutic efficacy for this disease. Calcitriol inhibited cell proliferation in AXT cells by blocking cell cycle progression. From a mechanistic standpoint, calcitriol induced endoplasmic reticulum (ER) stress, which was potentially responsible for downregulation of cyclin D1, activation of p38 MAPK, and intracellular production of reactive oxygen species (ROS). Knockdown of Atf4 or Ddit3 restored cell viability after calcitriol treatment, indicating that the ER stress response was indeed responsible for the anti-proliferative effect in AXT cells. Notably, the ER stress response was induced to a lesser extent in human osteosarcoma than in AXT cells, consistent with the weaker suppressive effect on cell growth in the human cells. Thus, the magnitude of ER stress induced by calcitriol might be an index of its anti-osteosarcoma effect. Although mice treated with calcitriol exhibited weight loss and elevated serum calcium levels, a single dose was sufficient to decrease osteosarcoma tumor size in vivo. Our findings suggest that calcitriol holds therapeutic potential for treatment of osteosarcoma, assuming that techniques to diminish its toxicity could be established. In addition, our results show that calcitriol could still be safely administered to osteosarcoma patients for its original purposes, including treatment of osteoporosis.
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Affiliation(s)
- Takatsune Shimizu
- Division of Gene Regulation, Institute for Advanced Medical Research, Keio University School of Medicine, Tokyo, Japan.,Department of Pathophysiology, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, Tokyo, Japan
| | - Walied A Kamel
- Division of Gene Regulation, Institute for Advanced Medical Research, Keio University School of Medicine, Tokyo, Japan.,Department of Pathophysiology, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, Tokyo, Japan.,Laboratory of Cell and Tissue Biology, Keio University School of Medicine, Tokyo, Japan.,Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Sayaka Yamaguchi-Iwai
- Division of Gene Regulation, Institute for Advanced Medical Research, Keio University School of Medicine, Tokyo, Japan.,Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Yumi Fukuchi
- Department of Pathophysiology, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, Tokyo, Japan
| | - Akihiro Muto
- Department of Pathophysiology, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, Tokyo, Japan
| | - Hideyuki Saya
- Division of Gene Regulation, Institute for Advanced Medical Research, Keio University School of Medicine, Tokyo, Japan
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92
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Gentilella A, Morón-Duran FD, Fuentes P, Zweig-Rocha G, Riaño-Canalias F, Pelletier J, Ruiz M, Turón G, Castaño J, Tauler A, Bueno C, Menéndez P, Kozma SC, Thomas G. Autogenous Control of 5′TOP mRNA Stability by 40S Ribosomes. Mol Cell 2017; 67:55-70.e4. [PMID: 28673543 PMCID: PMC5553558 DOI: 10.1016/j.molcel.2017.06.005] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/24/2017] [Accepted: 06/02/2017] [Indexed: 01/06/2023]
Abstract
Ribosomal protein (RP) expression in higher eukaryotes is regulated translationally through the 5′TOP sequence. This mechanism evolved to more rapidly produce RPs on demand in different tissues. Here we show that 40S ribosomes, in a complex with the mRNA binding protein LARP1, selectively stabilize 5′TOP mRNAs, with disruption of this complex leading to induction of the impaired ribosome biogenesis checkpoint (IRBC) and p53 stabilization. The importance of this mechanism is underscored in 5q− syndrome, a macrocytic anemia caused by a large monoallelic deletion, which we found to also encompass the LARP1 gene. Critically, depletion of LARP1 alone in human adult CD34+ bone marrow precursor cells leads to a reduction in 5′TOP mRNAs and the induction of p53. These studies identify a 40S ribosome function independent of those in translation that, with LARP1, mediates the autogenous control of 5′TOP mRNA stability, whose disruption is implicated in the pathophysiology of 5q− syndrome.
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Affiliation(s)
- Antonio Gentilella
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain; Department of Biochemistry and Physiology, Faculty of Pharmacy, Universitat de Barcelona, 08028 Barcelona, Spain.
| | - Francisco D Morón-Duran
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Pedro Fuentes
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Guilherme Zweig-Rocha
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Ferran Riaño-Canalias
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Joffrey Pelletier
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Marta Ruiz
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Gemma Turón
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain
| | - Julio Castaño
- Division of Hematology/Oncology, Department of Internal Medicine, University of Cincinnati Medical School, Cincinnati, OH 45267-0508, USA
| | - Albert Tauler
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain; Department of Biochemistry and Physiology, Faculty of Pharmacy, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Clara Bueno
- Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona, 08916 Barcelona, Spain
| | - Pablo Menéndez
- Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona, 08916 Barcelona, Spain; Institut Catala de Recerca i Estudis Avançats (ICREA) Lluis Companys, 08916 Barcelona, Spain
| | - Sara C Kozma
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain; Division of Hematology/Oncology, Department of Internal Medicine, University of Cincinnati Medical School, Cincinnati, OH 45267-0508, USA
| | - George Thomas
- Metabolism and Cancer Group, Molecular Mechanisms And Experimental Therapy In Oncology Program, Bellvitge Biomedical Research Institute, IDIBELL, 08908 Barcelona, Spain; Division of Hematology/Oncology, Department of Internal Medicine, University of Cincinnati Medical School, Cincinnati, OH 45267-0508, USA; Physiological Sciences Department, Faculty of Medicine and Health Science, University of Barcelona, 08908 Barcelona, Spain.
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93
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Hong S, Freeberg MA, Han T, Kamath A, Yao Y, Fukuda T, Suzuki T, Kim JK, Inoki K. LARP1 functions as a molecular switch for mTORC1-mediated translation of an essential class of mRNAs. eLife 2017; 6:e25237. [PMID: 28650797 PMCID: PMC5484620 DOI: 10.7554/elife.25237] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 06/15/2017] [Indexed: 12/15/2022] Open
Abstract
The RNA binding protein, LARP1, has been proposed to function downstream of mTORC1 to regulate the translation of 5'TOP mRNAs such as those encoding ribosome proteins (RP). However, the roles of LARP1 in the translation of 5'TOP mRNAs are controversial and its regulatory roles in mTORC1-mediated translation remain unclear. Here we show that LARP1 is a direct substrate of mTORC1 and Akt/S6K1. Deep sequencing of LARP1-bound mRNAs reveal that non-phosphorylated LARP1 interacts with both 5' and 3'UTRs of RP mRNAs and inhibits their translation. Importantly, phosphorylation of LARP1 by mTORC1 and Akt/S6K1 dissociates it from 5'UTRs and relieves its inhibitory activity on RP mRNA translation. Concomitantly, phosphorylated LARP1 scaffolds mTORC1 on the 3'UTRs of translationally-competent RP mRNAs to facilitate mTORC1-dependent induction of translation initiation. Thus, in response to cellular mTOR activity, LARP1 serves as a phosphorylation-sensitive molecular switch for turning off or on RP mRNA translation and subsequent ribosome biogenesis.
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Affiliation(s)
- Sungki Hong
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Mallory A Freeberg
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, United States
| | - Ting Han
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Avani Kamath
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Yao Yao
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Tomoko Fukuda
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Tsukasa Suzuki
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - John K Kim
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, United States
| | - Ken Inoki
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, United States
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, United States
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94
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Liu Y, Wang X, Jia Y, Liu Y. Effects of bufalin on the mTOR/p70S6K pathway and apoptosis in esophageal squamous cell carcinoma in nude mice. Int J Mol Med 2017; 40:357-366. [PMID: 28656204 PMCID: PMC5504976 DOI: 10.3892/ijmm.2017.3039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 06/15/2017] [Indexed: 12/20/2022] Open
Abstract
The aim of this study was to investigate the effects of bufalin on the mammalian target of rapamycin (mTOR/p70S6 kinase (p70S6K) signaling pathway and cell apoptosis in orthotopically transplanted tumors in nude mice. The mice were inoculated with human esophageal squamous cell carcinoma (ESCC) ECA109 cells in order to establish a model of orthotopicall transplanted ESCC tumors. The mice are administered low, medium and high doses of bufalin (0.5, 1.0 and 1.5 mg/kg) or rapamycin, or a combination of both. After the tumors were removed, the mRNA expression levels of mTOR, p70S6K, eukaryotic translation initiation factor 4E-binding protein 1 (4EBP1), cellular inhibitor of apoptosis protein 1 (cIAP1) and caspase-3 were detected by RT-PCR. In addition, we performed western blot analysis and immunohistochemical analysis to determine the protein expression of mTOR, p70S6K, 4EBP1, cIAP1, active caspase-3, Bcl-2 and Bad in the tumor tissue. The results revealed that bufalin exerted a significant anti-tumor effect in the nude mice with ESCC orthotopically transplanted tumors. This was shown by the decrease in the expression of mTOR, p70S6K and 4EBP1, which suggested that bufalin may possibly be used to inhibit tumor growth via the inhibition of the activation of p70S6K and 4EBP1. We also found that bufalin decreased the expression of cIAP1 and Bcl-2, and increased that of active caspase-3 and Bad, thus indicating that bufalin promoted apoptosis. Thus, our findings suggest that bufalin promotes tumor cell apoptosis, and this may be one of the important anti-tumor mechanisms of action of bufalin.
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Affiliation(s)
- Yao Liu
- Department of Pathology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Xu Wang
- Department of Pathology, The First Central Hospital of Baoding, Baoding, Hebei 071000, P.R. China
| | - Ying Jia
- Department of Pathology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Yueping Liu
- Department of Pathology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
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95
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Samuel SM, Ghosh S, Majeed Y, Arunachalam G, Emara MM, Ding H, Triggle CR. Metformin represses glucose starvation induced autophagic response in microvascular endothelial cells and promotes cell death. Biochem Pharmacol 2017; 132:118-132. [DOI: 10.1016/j.bcp.2017.03.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/02/2017] [Indexed: 11/27/2022]
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96
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González-Mariscal L, Miranda J, Raya-Sandino A, Domínguez-Calderón A, Cuellar-Perez F. ZO-2, a tight junction protein involved in gene expression, proliferation, apoptosis, and cell size regulation. Ann N Y Acad Sci 2017; 1397:35-53. [PMID: 28415133 DOI: 10.1111/nyas.13334] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 02/10/2017] [Accepted: 02/21/2017] [Indexed: 02/07/2023]
Abstract
ZO-2 is a peripheral tight junction protein that belongs to the membrane-associated guanylate kinase protein family. Here, we explain the modular and supramodular organization of ZO-2 that allows it to interact with a wide variety of molecules, including cell-cell adhesion proteins, cytoskeletal components, and nuclear factors. We also describe how ZO proteins evolved through metazoan evolution and analyze the intracellular traffic of ZO-2, as well as the roles played by ZO-2 at the plasma membrane and nucleus that translate into the regulation of proliferation, cell size, and apoptosis. In addition, we focus on the impact of ZO-2 expression on male fertility and on maladies like cancer, cholestasis, and hearing loss.
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Affiliation(s)
- Lorenza González-Mariscal
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Jael Miranda
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Arturo Raya-Sandino
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Alaide Domínguez-Calderón
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Francisco Cuellar-Perez
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
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97
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van Attekum MHA, Terpstra S, Slinger E, von Lindern M, Moerland PD, Jongejan A, Kater AP, Eldering E. Macrophages confer survival signals via CCR1-dependent translational MCL-1 induction in chronic lymphocytic leukemia. Oncogene 2017; 36:3651-3660. [PMID: 28192408 PMCID: PMC5584520 DOI: 10.1038/onc.2016.515] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/05/2016] [Accepted: 12/12/2016] [Indexed: 12/22/2022]
Abstract
Protective interactions with bystander cells in micro-environmental niches, such as lymph nodes (LNs), contribute to survival and therapy resistance of chronic lymphocytic leukemia (CLL) cells. This is caused by a shift in expression of B-cell lymphoma 2 (BCL-2) family members. Pro-survival proteins B-cell lymphoma-extra large (BCL-XL), BCL-2-related protein A1 (BFL-1) and myeloid leukemia cell differentiation protein 1 (MCL-1) are upregulated by LN-residing T cells through CD40L interaction, presumably via nuclear factor (NF)-κB signaling. Macrophages (Mφs) also reside in the LN, and are assumed to provide important supportive functions for CLL cells. However, if and how Mφs are able to induce survival is incompletely known. We first established that Mφs induced survival because of an exclusive upregulation of MCL-1. Next, we investigated the mechanism underlying MCL-1 induction by Mφs in comparison with CD40L. Genome-wide expression profiling of in vitro Mφ- and CD40L-stimulated CLL cells indicated activation of the phosphoinositide 3-kinase (PI3K)-V-Akt murine thymoma viral oncogene homolog (AKT)-mammalian target of rapamycin (mTOR) pathway, which was confirmed in ex vivo CLL LN material. Inhibition of PI3K-AKT-mTOR signaling abrogated MCL-1 upregulation and survival by Mφs, as well as CD40 stimulation. MCL-1 can be regulated at multiple levels, and we established that AKT leads to increased MCL-1 translation, but does not affect MCL-1 transcription or protein stabilization. Furthermore, among Mφ-secreted factors that could activate AKT, we found that induction of MCL-1 and survival critically depended on C-C motif chemokine receptor-1 (CCR1). In conclusion, this study indicates that two distinct micro-environmental factors, CD40L and Mφs, signal via CCR1 to induce AKT activation resulting in translational stabilization of MCL-1, and hence can contribute to CLL cell survival.
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Affiliation(s)
- M H A van Attekum
- Department of Hematology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - S Terpstra
- Department of Hematology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - E Slinger
- Department of Hematology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - M von Lindern
- Department of Hematopoiesis, Sanquin Research, Amsterdam, The Netherlands
| | - P D Moerland
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - A Jongejan
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - A P Kater
- Department of Hematology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Lymphoma and Myeloma Center Amsterdam (LYMMCARE), Amsterdam, The Netherlands
| | - E Eldering
- Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Lymphoma and Myeloma Center Amsterdam (LYMMCARE), Amsterdam, The Netherlands
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98
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Ding YY, Tang X, Cheng XR, Wang FF, Li ZQ, Wu SJ, Kou XR, Shi Y, Le G. Effects of dietary oxidized tyrosine products on insulin secretion via the thyroid hormone T3-regulated TRβ1–Akt–mTOR pathway in the pancreas. RSC Adv 2017. [DOI: 10.1039/c7ra10435a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Oxidized tyrosine products (OTPs) have been detected in commercial foods with high protein content.
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Affiliation(s)
- Yin-Yi Ding
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Xue Tang
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Xiang-Rong Cheng
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Fang-Fang Wang
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Zhu-Qing Li
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Sha-Ji Wu
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Xing-Ran Kou
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Yonghui Shi
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Guowei Le
- The State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
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Wang SF, Wu MY, Cai CZ, Li M, Lu JH. Autophagy modulators from traditional Chinese medicine: Mechanisms and therapeutic potentials for cancer and neurodegenerative diseases. JOURNAL OF ETHNOPHARMACOLOGY 2016; 194:861-876. [PMID: 27793785 DOI: 10.1016/j.jep.2016.10.069] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 10/19/2016] [Accepted: 10/21/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional Chinese medicine (TCM), an ancient yet still alive medicinal system widely used in East Asia, has played an essential role in health maintenance and diseases control, for a wide range of human chronic diseases like cancers and neurodegenerative diseases. TCM-derived compounds and extracts attract wide attention for their potential application as therapeutic agents against above mentioned diseases. AIM OF REVIEW Recent years the enthusiasm in searching for autophagy regulators for human diseases has yielded many positive hits. TCM-derived compounds as important sources for drug discovery have been widely tested in different models for autophagy modulation. Here we summarize the current progress in the discovery of natural autophagy regulators from TCM for the therapeutic application in cancer and neurodegenerative disease models, aiming to provide the direct link from traditional use to new pharmacological application. METHODS The present review collected the literature published during the recent 10 years which studied the effect of TCM-derived compounds or extracts on autophagy regulation from PubMed, Web of Science, Google Scholar and Science Direct. The names of chemical compounds studied in this article are corresponding to the information in journal plant list. RESULTS In this review, we give a brief introduction about the autophagy and its roles in cancer and neurodegenerative disease models and describe the molecular mechanisms of autophagy modulation. We also make comprehensive lists to summarize the effects and underlying mechanisms of TCM-derived autophagy regulators in cancer and neurodegenerative disease models. In the end of the review, we discuss the current strategies, problems and future direction for TCM-derived autophagy regulators in the treatment of human diseases. CONCLUSIONS A number of data from in vivo and in vitro models indicated TCM derived compounds and extracts hold great potential for the treatment of human diseases including cancers and neurodegenerative diseases. Autophagy, as a novel and promising drug target involved in a wide range of human diseases, can be modulated by many TCM derived agents, indicating autophagy modulation may be an important mechanism underlying the therapeutic effect of TCM in treating diseases. Furthermore, we look forward to seeing the discovery of ideal autophagy modulators from TCM with considerably higher selectivity for the treatment of human diseases.
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Affiliation(s)
- Sheng-Fang Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau
| | - Ming-Yue Wu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau
| | - Cui-Zan Cai
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau
| | - Min Li
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong
| | - Jia-Hong Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau
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Ochnik AM, Peterson MS, Avdulov SV, Oh AS, Bitterman PB, Yee D. Amplified in Breast Cancer Regulates Transcription and Translation in Breast Cancer Cells. Neoplasia 2016; 18:100-10. [PMID: 26936396 PMCID: PMC5005264 DOI: 10.1016/j.neo.2016.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/26/2015] [Accepted: 01/04/2016] [Indexed: 01/27/2023] Open
Abstract
Background Control of mRNA translation is fundamentally altered in cancer. Insulin-like growth factor-I (IGF-I) signaling regulates key translation mediators to modulate protein synthesis (e.g. eIF4E, 4E-BP1, mTOR, and S6K1). Importantly the Amplified in Breast Cancer (AIB1) oncogene regulates transcription and is also a downstream mediator of IGF-I signaling. Materials and Methods To determine if AIB1 also affects mRNA translation, we conducted gain and loss of AIB1 function experiments in estrogen receptor alpha (ERα)+ (MCF-7L) and ERα- (MDA-MB-231, MDA-MB-435 and LCC6) breast cancer cells. Results AIB1 positively regulated IGF-I-induced mRNA translation in both ERα+ and ERα- cells. Formation of the eIF4E-4E-BP1 translational complex was altered in the AIB1 ERα+ and ERα- knockdown cells, leading to a reduction in the eIF4E/4E-BP1 and eIF4G/4E-BP1 ratios. In basal and IGF-I stimulated MCF-7 and LCC6 cells, knockdown of AIB1 decreased the integrity of the cap-binding complex, reduced global IGF-I stimulated polyribosomal mRNA recruitment with a concomitant decrease in ten of the thirteen genes tested in polysome-bound mRNAs mapping to proliferation, cell cycle, survival, transcription, translation and ribosome biogenesis ontologies. Specifically, knockdown of AIB1 decreased ribosome-bound mRNA and steady-state protein levels of the transcription factors ERα and E2F1 in addition to reduced ribosome-bound mRNA of the ribosome biogenesis factor BYSL in a cell-line specific manner to regulate mRNA translation. Conclusion The oncogenic transcription factor AIB1 has a novel role in the regulation of polyribosome recruitment and formation of the translational complex. Combinatorial therapies targeting IGF signaling and mRNA translation in AIB1 expressing breast cancers may have clinical benefit and warrants further investigation.
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Affiliation(s)
- Aleksandra M Ochnik
- Masonic Cancer Center, Departments of Medicine and Pharmacology, University of Minnesota, Minneapolis, MN, USA.
| | - Mark S Peterson
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Minneapolis, MN, USA.
| | - Svetlana V Avdulov
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Minneapolis, MN, USA.
| | - Annabell S Oh
- Masonic Cancer Center, Departments of Medicine and Pharmacology, University of Minnesota, Minneapolis, MN, USA.
| | - Peter B Bitterman
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Minneapolis, MN, USA.
| | - Douglas Yee
- Masonic Cancer Center, Departments of Medicine and Pharmacology, University of Minnesota, Minneapolis, MN, USA.
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