1
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Zhuang W, Dong X, Wang B, Liu N, Guo H, Zhang C, Gan W. NRF-1 directly regulates TFE3 and promotes the proliferation of renal cancer cells. Oncol Lett 2021; 22:679. [PMID: 34345304 PMCID: PMC8323008 DOI: 10.3892/ol.2021.12940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 06/07/2021] [Indexed: 11/06/2022] Open
Abstract
The role of transcription factor binding to IGHM enhancer 3 (TFE3) in renal cell carcinoma (RCC) is not well understood. Nuclear respiratory factor 1 (NRF-1) may be the positive upstream regulatory gene of TFE3. The aim of the present study was to determine whether NRF-1 could directly regulate the expression of TFE3 and regulate tumorigenesis and progression of RCC through TFE3. Short hairpin RNA (shRNA) was used to silence the expression of NRF-1 in the 786-O human kidney adenocarcinoma cell line and the 293T human embryonic kidney cell line. Luciferase reporter assays were used to determine the relationship between NRF-1 and TFE3. The CHIP experiment was used to verify the actual binding of NRF-1 and TFE3 promoter regions. MitoTimer staining was used to measure mitochondrial biosynthesis. Flow cytometry was used to detect cell cycle and apoptosis. The 786-O and 293T cells were used to examine the underlying mechanism of action. The results demonstrated that NRF-1 could bind to the promoter region of the TFE3 gene and directly regulate the expression of TFE3. Following NRF-1 knockdown, the protein levels of phosphorylated (p)-AKT and p-S6 of mTOR pathway was inhibited, cell cycle progression was blocked, the levels of apoptosis increased, and mitochondrial generation was reduced. Following overexpression of TFE3, the levels of mTOR-associated markers were restored in NRF-1 knockdown cells. These findings suggest that NRF-1 may regulate the mTOR pathway through TFE3 and regulate the energy metabolism, proliferation and growth of cancer cells by directly regulating the expression of TFE3.
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Affiliation(s)
- Wenyuan Zhuang
- Department of Urology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
| | - Xiang Dong
- Department of Urology, Drum Tower Clinical Medical School of Nanjing Medical University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
| | - Bo Wang
- Department of Urology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
| | - Ning Liu
- Department of Urology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
| | - Hongqian Guo
- Department of Urology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
| | - Chunni Zhang
- Department of Clinical Laboratory, Jinling Hospital, Nanjing University School of Medicine, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
| | - Weidong Gan
- Department of Urology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
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2
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Orfali N, O'Donovan TR, Cahill MR, Benjamin D, Nanus DM, McKenna SL, Gudas LJ, Mongan NP. All-trans retinoic acid (ATRA)-induced TFEB expression is required for myeloid differentiation in acute promyelocytic leukemia (APL). Eur J Haematol 2020; 104:236-250. [PMID: 31811682 DOI: 10.1111/ejh.13367] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 02/14/2019] [Accepted: 02/18/2019] [Indexed: 02/03/2023]
Abstract
OBJECTIVE In acute promyelocytic leukemia (APL), normal retinoid signaling is disrupted by an abnormal PML-RARα fusion oncoprotein, leading to a block in cell differentiation. Therapeutic concentrations of all-trans-retinoic acid (ATRA) can restore retinoid-induced transcription and promote degradation of the PML-RARα protein. Autophagy is a catabolic pathway that utilizes lysosomal machinery to degrade intracellular material and facilitate cellular re-modeling. Recent studies have identified autophagy as an integral component of ATRA-induced myeloid differentiation. METHODS As the molecular communication between retinoid signaling and the autophagy pathway is not defined, we performed RNA sequencing of NB4 APL cells treated with ATRA and examined autophagy-related transcripts. RESULTS ATRA altered the expression of >80 known autophagy-related transcripts, including the key transcriptional regulator of autophagy and lysosomal biogenesis, TFEB (11.5-fold increase). Induction of TFEB and its transcriptional target, sequestosome 1 (SQSTM1, p62), is reduced in ATRA-resistant NB4R cells compared to NB4 cells. TFEB knockdown in NB4 cells alters the expression of transcriptional targets of TFEB and reduces CD11b transcript levels in response to ATRA. CONCLUSIONS We show for the first time that TFEB plays an important role in ATRA-induced autophagy during myeloid differentiation and that autophagy induction potentiates leukemic cell differentiation (Note: this study includes data obtained from NCT00195156, https://clinicaltrials.gov/show/NCT00195156).
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Affiliation(s)
- Nina Orfali
- Cork Cancer Research Centre & CancerResearch@UCC, Western Gateway Building, University College Cork, Cork, Ireland.,Department of Haematology, Cork University Hospital, Cork, Ireland.,Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA.,Division of Hematology and Medical Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Tracey R O'Donovan
- Cork Cancer Research Centre & CancerResearch@UCC, Western Gateway Building, University College Cork, Cork, Ireland
| | - Mary R Cahill
- Cork Cancer Research Centre & CancerResearch@UCC, Western Gateway Building, University College Cork, Cork, Ireland.,Department of Haematology, Cork University Hospital, Cork, Ireland
| | - Dalyia Benjamin
- Cork Cancer Research Centre & CancerResearch@UCC, Western Gateway Building, University College Cork, Cork, Ireland.,Department of Haematology, Cork University Hospital, Cork, Ireland.,Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
| | - David M Nanus
- Division of Hematology and Medical Oncology, Department of Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Sharon L McKenna
- Cork Cancer Research Centre & CancerResearch@UCC, Western Gateway Building, University College Cork, Cork, Ireland
| | - Lorraine J Gudas
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
| | - Nigel P Mongan
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA.,University of Nottingham Biodiscovery Institute, Faculty of Medicine and Health Sciences, School of Veterinary Medicine and Science, University of Nottingham, Nottingham, UK
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3
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Ou X, Gao JH, He LH, Yu XH, Wang G, Zou J, Zhao ZW, Zhang DW, Zhou ZJ, Tang CK. Angiopoietin-1 aggravates atherosclerosis by inhibiting cholesterol efflux and promoting inflammatory response. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1865:158535. [PMID: 31678621 DOI: 10.1016/j.bbalip.2019.158535] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 10/21/2019] [Accepted: 10/25/2019] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Angiopoietin-1 (Ang-1), a secreted protein, mainly regulates angiogenesis. Ang-1 has been shown to promote the development of atherosclerosis, whereas little is known about its effects on lipid metabolism and inflammation in this process. METHOD Ang-1 was transfected into ApoE-/- mice via lentiviral vector or incubated with THP-1 derived macrophages. Oil red O and HE staining were performed to measure the size of atherosclerotic plaques in ApoE-/- mice. Immunofluorescence was employed to show the expression of target proteins in aorta. [3H] labeled cholesterol was performed to examine the efficiency of cholesterol efflux and reverse cholesterol transport (RCT) both in vivo and vitro. Western blot and qPCR were used to quantify target proteins both in vivo and vitro. ELISA detected the levels of pro-inflammatory cytokines in mouse peritoneal macrophage. RESULTS Our data showed that Ang-1 augmented atherosclerotic plaques formation and inhibited cholesterol efflux. The binding of Ang-1 to Tie2 resulted in downregulation of LXRα, ABCA1 and ABCG1 expression via inhibiting the translocation of TFE3 into nucleus. In addition, Ang-1 decreased serum HDL-C levels and reduced reverse cholesterol transport (RCT) in ApoE-/- mice. Furthermore, Ang-1 induced lipid accumulation followed by increasing TNF-α, IL-6, IL-1β,and MCP-1 produced by MPMs, as well as inducing M1 phenotype macrophage marker iNOS and CD86 expression in aorta of ApoE-/- mice. CONCLUSION Ang-1 has an adverse effect on cholesterol efflux by decreasing the expression of ABCA1 and ABCG1 via Tie2/TFE3/LXRα pathway, thereby promoting inflammation and accelerating atherosclerosis progression.
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Affiliation(s)
- Xiang Ou
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China; Department of Endocrinology, The First Hospital of Changsha, Changsha, Hunan 410005, China
| | - Jia-Hui Gao
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China
| | - Lin-Hao He
- School of Pharmacy and Life Science College, Medical Research Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China
| | - Xiao-Hua Yu
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China
| | - Gang Wang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China
| | - Jin Zou
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China
| | - Zhen-Wang Zhao
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China
| | - Da-Wei Zhang
- Department of Pediatrics and Group on the Molecular and Cell Biology of Lipids, University of Alberta, Edmonton, Alberta T6G 2S2, Canada
| | - Zhi-Jiao Zhou
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan, China.
| | - Chao-Ke Tang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, Medical Research Experiment Center, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, China.
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4
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Anesi A, Generali L, Sandoni L, Pozzi S, Grande A. From Osteoclast Differentiation to Osteonecrosis of the Jaw: Molecular and Clinical Insights. Int J Mol Sci 2019; 20:ijms20194925. [PMID: 31590328 PMCID: PMC6801843 DOI: 10.3390/ijms20194925] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/27/2019] [Accepted: 09/30/2019] [Indexed: 01/05/2023] Open
Abstract
Bone physiology relies on the delicate balance between resorption and formation of its tissue. Bone resorption depends on a process called osteoclastogenesis in which bone-resorbing cells, i.e., osteoclasts, are produced by the differentiation of more undifferentiated progenitors and precursors. This process is governed by two main factors, monocyte-colony stimulating factor (M-CSF) and receptor activator of NFκB ligand (RANKL). While the former exerts a proliferating effect on progenitors/precursors, the latter triggers a differentiation effect on more mature cells of the same lineage. Bone homeostasis requires a perfect space–time coordination of the involved signals. When osteoclastogenesis is poorly balanced with the differentiation of the bone forming counterparts, i.e., osteoblasts, physiological bone remodelling can turn into a pathological state, causing the systematic disruption of bone tissue which results in osteopenia or osteolysis. Examples of these conditions are represented by osteoporosis, Paget’s disease, bone metastasis, and multiple myeloma. Therefore, drugs targeting osteoclastogenesis, such as bisphosphonates and an anti-RANKL monoclonal antibody, have been developed and are currently used in the treatment of such diseases. Despite their demonstrated therapeutic efficacy, these agents are unfortunately not devoid of side effects. In this regard, a condition called osteonecrosis of the jaw (ONJ) has been recently correlated with anti-resorptive therapy. In this review we will address the involvement of osteoclasts and osteoclast-related factors in the pathogenesis of ONJ. It is to be hoped that a better understanding of the biological mechanisms underlying bone remodelling will help in the design a medical therapeutic approach for ONJ as an alternative to surgical procedures.
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Affiliation(s)
- Alexandre Anesi
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Via del Pozzo 71, 41124 Modena, Italy.
| | - Luigi Generali
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena and Reggio Emilia, 41121 Modena, Italy.
| | - Laura Sandoni
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi 287, 41125 Modena, Italy.
| | - Samantha Pozzi
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, Via del Pozzo 71, 41124 Modena, Italy.
| | - Alexis Grande
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi 287, 41125 Modena, Italy.
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5
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Mammoli F, Parenti S, Lomiento M, Gemelli C, Atene CG, Grande A, Corradini R, Manicardi A, Fantini S, Zanocco-Marani T, Ferrari S. Physiological expression of miR-130a during differentiation of CD34 + human hematopoietic stem cells results in the inhibition of monocyte differentiation. Exp Cell Res 2019; 382:111445. [PMID: 31152707 DOI: 10.1016/j.yexcr.2019.05.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 05/20/2019] [Accepted: 05/23/2019] [Indexed: 01/24/2023]
Abstract
MicroRNAs (miRNA) are small noncoding RNAs that regulate gene expression by targeting mRNAs in a sequence specific manner, thereby determining their degradation or inhibiting translation. They are involved in processes such as proliferation, differentiation and apoptosis by fine-tuning the expression of genes underlying such events. The expression of specific miRNAs is involved in hematopoietic differentiation and their deregulation contributes to the development of hematopoietic malignancies such as acute myeloid leukemia (AML). miR-130a is over-expressed in AML. Here we show that miR-130a is physiologically expressed in myeloblasts and down-regulated during monocyte differentiation. Gain- and loss-of-function experiments performed on CD34+ human hematopoietic stem cells confirmed that expression of miR-130a inhibits monocyte differentiation by interfering with the expression of key transcription factors HOXA10, IRF8, KLF4, MAFB and PU-1. The data obtained in this study highlight that the correct modulation of miR-130a is necessary for normal differentiation to occur and confirming that deregulation of this miRNA might underlie the differentiation block occurring in AML.
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Affiliation(s)
- Fabiana Mammoli
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) Srl - IRCCS, Italy.
| | - Sandra Parenti
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125, Modena, Italy.
| | - Mariana Lomiento
- Sant'Orsola Malpighi Hospital, University of Bologna, Bologna, Italy.
| | - Claudia Gemelli
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125, Modena, Italy.
| | - Claudio Giacinto Atene
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125, Modena, Italy.
| | - Alexis Grande
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125, Modena, Italy.
| | - Roberto Corradini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, I-43124 Parma, Italy.
| | - Alex Manicardi
- Department of Organic and Macromolecular Chemistry Organic and Biomimetic Chemistry Research Group (OBCR) Faculty of Sciences - Ghent University Campus Sterre, Krijgslaan, 281 S4 B-9000 Gent, Belgium.
| | - Sebastian Fantini
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125, Modena, Italy.
| | - Tommaso Zanocco-Marani
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) Srl - IRCCS, Italy.
| | - Sergio Ferrari
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125, Modena, Italy.
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6
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Magnesium Is a Key Regulator of the Balance between Osteoclast and Osteoblast Differentiation in the Presence of Vitamin D₃. Int J Mol Sci 2019; 20:ijms20020385. [PMID: 30658432 PMCID: PMC6358963 DOI: 10.3390/ijms20020385] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 12/21/2018] [Accepted: 01/12/2019] [Indexed: 01/28/2023] Open
Abstract
Magnesium (Mg) is crucial for bone health. Low concentrations of Mg inhibit the activity of osteoblasts while promoting that of osteoclasts, with the final result of inducing osteopenia. Conversely, little is known about the effects of high concentrations of extracellular Mg on osteoclasts and osteoblasts. Since the differentiation and activation of these cells is coordinated by vitamin D₃ (VD3), we investigated the effects of high extracellular Mg, as well as its impact on VD3 activity, in these cells. U937 cells were induced to osteoclastic differentiation by VD3 in the presence of supra-physiological concentrations (>1 mM) of extracellular Mg. The effect of high Mg concentrations was also studied in human bone-marrow-derived mesenchymal stem cells (bMSCs) induced to differentiate into osteoblasts by VD3. We demonstrate that high extra-cellular Mg levels potentiate VD3-induced osteoclastic differentiation, while decreasing osteoblastogenesis. We hypothesize that Mg might reprogram VD3 activity on bone remodeling, causing an unbalanced activation of osteoclasts and osteoblasts.
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Abstract
In recent years, our vision of lysosomes has drastically changed. Formerly considered to be mere degradative compartments, they are now recognized as key players in many cellular processes. The ability of lysosomes to respond to different stimuli revealed a complex and coordinated regulation of lysosomal gene expression. This review discusses the participation of the transcription factors TFEB and TFE3 in the regulation of lysosomal function and biogenesis, as well as the role of the lysosomal pathway in cellular adaptation to a variety of stress conditions, including nutrient deprivation, mitochondrial dysfunction, protein misfolding, and pathogen infection. We also describe how cancer cells make use of TFEB and TFE3 to promote their own survival and highlight the potential of these transcription factors as therapeutic targets for the treatment of neurological and lysosomal diseases.
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Affiliation(s)
- Nina Raben
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland 20892;
| | - Rosa Puertollano
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892;
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8
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Pastore N, Brady OA, Diab HI, Martina JA, Sun L, Huynh T, Lim JA, Zare H, Raben N, Ballabio A, Puertollano R. TFEB and TFE3 cooperate in the regulation of the innate immune response in activated macrophages. Autophagy 2016; 12:1240-58. [PMID: 27171064 DOI: 10.1080/15548627.2016.1179405] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The activation of transcription factors is critical to ensure an effective defense against pathogens. In this study we identify a critical and complementary role of the transcription factors TFEB and TFE3 in innate immune response. By using a combination of chromatin immunoprecipitation, CRISPR-Cas9-mediated genome-editing technology, and in vivo models, we determined that TFEB and TFE3 collaborate with each other in activated macrophages and microglia to promote efficient autophagy induction, increased lysosomal biogenesis, and transcriptional upregulation of numerous proinflammatory cytokines. Furthermore, secretion of key mediators of the inflammatory response (CSF2, IL1B, IL2, and IL27), macrophage differentiation (CSF1), and macrophage infiltration and migration to sites of inflammation (CCL2) was significantly reduced in TFEB and TFE3 deficient cells. These new insights provide us with a deeper understanding of the transcriptional regulation of the innate immune response.
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Affiliation(s)
- Nunzia Pastore
- a Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA.,b Jan and Dan Duncan Neurological Research Institute, Texas Children Hospital , Houston , TX , USA
| | - Owen A Brady
- c Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda , MD , USA
| | - Heba I Diab
- c Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda , MD , USA
| | - José A Martina
- c Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda , MD , USA
| | - Lu Sun
- c Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda , MD , USA
| | - Tuong Huynh
- a Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA.,b Jan and Dan Duncan Neurological Research Institute, Texas Children Hospital , Houston , TX , USA
| | - Jeong-A Lim
- d Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health , Bethesda , MD , USA
| | - Hossein Zare
- d Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health , Bethesda , MD , USA
| | - Nina Raben
- d Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health , Bethesda , MD , USA
| | - Andrea Ballabio
- a Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA.,b Jan and Dan Duncan Neurological Research Institute, Texas Children Hospital , Houston , TX , USA.,e Telethon Institute of Genetics and Medicine (TIGEM) , Naples , Italy.,f Medical Genetics, Department of Translational Medicine, Federico II University , Naples , Italy
| | - Rosa Puertollano
- c Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda , MD , USA
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9
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Baba M, Toyama H, Sun L, Takubo K, Suh HC, Hasumi H, Nakamura-Ishizu A, Hasumi Y, Klarmann KD, Nakagata N, Schmidt LS, Linehan WM, Suda T, Keller JR. Loss of Folliculin Disrupts Hematopoietic Stem Cell Quiescence and Homeostasis Resulting in Bone Marrow Failure. Stem Cells 2016; 34:1068-82. [PMID: 27095138 PMCID: PMC4843833 DOI: 10.1002/stem.2293] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2015] [Indexed: 12/21/2022]
Abstract
Folliculin (FLCN) is an autosomal dominant tumor suppressor gene that modulates diverse signaling pathways required for growth, proliferation, metabolism, survival, motility, and adhesion. FLCN is an essential protein required for murine embryonic development, embryonic stem cell (ESC) commitment, and Drosophila germline stem cell maintenance, suggesting that Flcn may be required for adult stem cell homeostasis. Conditional inactivation of Flcn in adult hematopoietic stem/progenitor cells (HSPCs) drives hematopoietic stem cells (HSC) into proliferative exhaustion resulting in the rapid depletion of HSPC, loss of all hematopoietic cell lineages, acute bone marrow (BM) failure, and mortality after 40 days. HSC that lack Flcn fail to reconstitute the hematopoietic compartment in recipient mice, demonstrating a cell-autonomous requirement for Flcn in HSC maintenance. BM cells showed increased phosphorylation of Akt and mTorc1, and extramedullary hematopoiesis was significantly reduced by treating mice with rapamycin in vivo, suggesting that the mTorc1 pathway was activated by loss of Flcn expression in hematopoietic cells in vivo. Tfe3 was activated and preferentially localized to the nucleus of Flcn knockout (KO) HSPCs. Tfe3 overexpression in HSPCs impaired long-term hematopoietic reconstitution in vivo, recapitulating the Flcn KO phenotype, and supporting the notion that abnormal activation of Tfe3 contributes to the Flcn KO phenotype. Flcn KO mice develop an acute histiocytic hyperplasia in multiple organs, suggesting a novel function for Flcn in macrophage development. Thus, Flcn is intrinsically required to maintain adult HSC quiescence and homeostasis, and Flcn loss leads to BM failure and mortality in mice.
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Affiliation(s)
- Masaya Baba
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, 〒 860-0811, Japan
| | - Hirofumi Toyama
- Department of Cell Differentiation, The Sakaguchi Laboratory of Developmental Biology, School of Medicine, Keio University, 35 Shinano-machi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Lei Sun
- Mouse Cancer Genetics Program and Basic Science Program, Leidos Biomedical Research, Inc., Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Keiyo Takubo
- Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Hyung-Chan Suh
- Mouse Cancer Genetics Program and Basic Science Program, Leidos Biomedical Research, Inc., Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Hisashi Hasumi
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ayako Nakamura-Ishizu
- Department of Cell Differentiation, The Sakaguchi Laboratory of Developmental Biology, School of Medicine, Keio University, 35 Shinano-machi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Yukiko Hasumi
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kimberly D. Klarmann
- Mouse Cancer Genetics Program and Basic Science Program, Leidos Biomedical Research, Inc., Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Naomi Nakagata
- Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, Kumamoto, 〒 860-0811, Japan
| | - Laura S. Schmidt
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Mouse Cancer Genetics Program and Basic Science Program, Leidos Biomedical Research, Inc., Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - W. Marston Linehan
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Toshio Suda
- Department of Cell Differentiation, The Sakaguchi Laboratory of Developmental Biology, School of Medicine, Keio University, 35 Shinano-machi, Shinjuku-ku, Tokyo 160-8582, Japan
- International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, 〒 860-0811, Japan
| | - Jonathan R. Keller
- Mouse Cancer Genetics Program and Basic Science Program, Leidos Biomedical Research, Inc., Center for Cancer Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
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10
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Martina JA, Diab HI, Brady OA, Puertollano R. TFEB and TFE3 are novel components of the integrated stress response. EMBO J 2016; 35:479-95. [PMID: 26813791 DOI: 10.15252/embj.201593428] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 12/10/2015] [Indexed: 12/29/2022] Open
Abstract
To reestablish homeostasis and mitigate stress, cells must activate a series of adaptive intracellular signaling pathways. The participation of the transcription factors TFEB and TFE3 in cellular adaptation to starvation is well established. Here, we show that TFEB and TFE3 also play an important role in the cellular response to ER stress. Treatment with ER stressors causes translocation of TFEB and TFE3 to the nucleus in a process that is dependent on PERK and calcineurin but not on mTORC1. Activated TFEB and TFE3 enhance cellular response to stress by inducing direct transcriptional upregulation of ATF4 and other UPR genes. Under conditions of prolonged ER stress, TFEB and TFE3 contribute to cell death, thus revealing an unexpected role for these proteins in controlling cell fate. This work evidences a broader role of TFEB and TFE3 in the cellular response to stress than previously anticipated and reveals an integrated cooperation between different cellular stress pathways.
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Affiliation(s)
- José A Martina
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Heba I Diab
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Owen A Brady
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Rosa Puertollano
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
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11
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Gemelli C, Zanocco Marani T, Bicciato S, Mazza EMC, Boraschi D, Salsi V, Zappavigna V, Parenti S, Selmi T, Tagliafico E, Ferrari S, Grande A. MafB is a downstream target of the IL-10/STAT3 signaling pathway, involved in the regulation of macrophage de-activation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2014; 1843:955-64. [PMID: 24472656 DOI: 10.1016/j.bbamcr.2014.01.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 01/16/2014] [Accepted: 01/21/2014] [Indexed: 01/08/2023]
Abstract
In spite of the numerous reports implicating MafB transcription factor in the molecular control of monocyte-macrophage differentiation, the precise genetic program underlying this activity has been, to date, poorly understood. To clarify this issue, we planned a number of experiments that were mainly conducted on human primary macrophages. In this regard, a preliminary gene function study, based on MafB inactivation and over-expression, indicated MMP9 and IL-7R genes as possible targets of the investigated transcription factor. Bioinformatics analysis of their promoter regions disclosed the presence of several putative MARE elements and a combined approach of EMSA and luciferase assay subsequently demonstrated that expression of both genes is indeed activated by MafB through a direct transcription mechanism. Additional investigation, performed with similar procedures to elucidate the biological relevance of our observation, revealed that MafB is a downstream target of the IL-10/STAT3 signaling pathway, normally inducing the macrophage de-activation process. Taken together our data support the existence of a signaling cascade by which stimulation of macrophages with the IL-10 cytokine determines a sequential activation of STAT3 and MafB transcription factors, in turn leading to an up-regulated expression of MMP9 and IL-7R genes.
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Affiliation(s)
- Claudia Gemelli
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy.
| | - Tommaso Zanocco Marani
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Silvio Bicciato
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Emilia M C Mazza
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Diana Boraschi
- Immunobiology Unit, Institute of Biomedical Technologies, CNR, Pisa, Italy
| | - Valentina Salsi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Vincenzo Zappavigna
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Sandra Parenti
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Tommaso Selmi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Enrico Tagliafico
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Sergio Ferrari
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
| | - Alexis Grande
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy
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12
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Rodríguez-Ramilo ST, Fernández J, Toro MA, Bouza C, Hermida M, Fernández C, Pardo BG, Cabaleiro S, Martínez P. Uncovering QTL for resistance and survival time to Philasterides dicentrarchi in turbot (Scophthalmus maximus). Anim Genet 2012; 44:149-57. [PMID: 22690723 DOI: 10.1111/j.1365-2052.2012.02385.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2012] [Indexed: 01/22/2023]
Abstract
Disease resistance-related traits have received increasing importance in aquaculture breeding programs worldwide. Currently, genomic information offers new possibilities in breeding to address the improvement of this kind of traits. The turbot is one of the most promising European aquaculture species, and Philasterides dicentrarchi is a scuticociliate parasite causing fatal disease in farmed turbot. An appealing approach to fight against disease is to achieve a more robust broodstock, which could prevent or diminish the devastating effects of scuticociliatosis on farmed individuals. In the present study, a genome scan for quantitative trait loci (QTL) affecting resistance and survival time to P. dicentrarchi in four turbot families was carried out. The objectives were to identify QTL using different statistical approaches [linear regression (LR) and maximum likelihood (ML)] and to locate significantly associated markers for their application in genetic breeding strategies. Several genomic regions controlling resistance and survival time to P. dicentrarchi were detected. When analyzing each family separately, significant QTL for resistance were identified by the LR method in two linkage groups (LG1 and LG9) and for survival time in LG1, while the ML methodology identified QTL for resistance in LG9 and LG23 and for survival time in LG6 and LG23. The analysis of the total data set identified an additional significant QTL for resistance and survival time in LG3 with the LR method. Significant association between disease resistance-related traits and genotypes was detected for several markers, a single one explaining up to 22% of the phenotypic variance. Obtained results will be essential to identify candidate genes for resistance and to apply them in marker-assisted selection programs to improve turbot production.
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Affiliation(s)
- S T Rodríguez-Ramilo
- Departamento de Bioquímica, Genética e Inmunología, Facultad de Biología, Universidad de Vigo, Vigo, Spain
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13
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Vignudelli T, Selmi T, Martello A, Parenti S, Grande A, Gemelli C, Zanocco-Marani T, Ferrari S. ZFP36L1 negatively regulates erythroid differentiation of CD34+ hematopoietic stem cells by interfering with the Stat5b pathway. Mol Biol Cell 2010; 21:3340-51. [PMID: 20702587 PMCID: PMC2947470 DOI: 10.1091/mbc.e10-01-0040] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
ZFP36L1 is a member of a family of CCCH tandem zinc finger proteins (TTP family) able to bind to AU-rich elements in the 3'-untranslated region of mRNAs, thereby triggering their degradation. The present study suggests that such mechanism is used during hematopoiesis to regulate differentiation by posttranscriptionally modulating the expression of specific target genes. In particular, it demonstrates that ZFP36L1 negatively regulates erythroid differentiation by directly binding the 3' untranslated region of Stat5b encoding mRNA. Stat5b down-regulation obtained by ZFP36L1 overexpression results, in human hematopoietic progenitors, in a drastic decrease of erythroid colonies formation. These observations have been confirmed by silencing experiments targeting Stat5b and by treating hematopoietic stem/progenitor cells with drugs able to induce ZFP36L1 expression. Moreover, this study shows that different members of ZFP36L1 family act redundantly, because cooverexpression of ZFP36L1 and family member ZFP36 determines a cumulative effect on Stat5b down-regulation. This work describes a mechanism underlying ZFP36L1 capability to regulate hematopoietic differentiation and suggests a new target for the therapy of hematopoietic diseases involving Stat5b/JAK2 pathway, such as chronic myeloproliferative disorders.
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Affiliation(s)
- Tatiana Vignudelli
- Università di Modena e Reggio Emilia, Dipartimento di Scienze Biomediche, Sezione di Chimica Biologica, 41100, Modena, Italy
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14
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Schwarz T, Murphy S, Sohn C, Mansky KC. C-TAK1 interacts with microphthalmia-associated transcription factor, Mitf, but not the related family member Tfe3. Biochem Biophys Res Commun 2010; 394:890-5. [PMID: 20214879 DOI: 10.1016/j.bbrc.2010.03.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2010] [Accepted: 03/03/2010] [Indexed: 10/19/2022]
Abstract
Microphthalmia-associated transcription factor, Mitf, has been shown to be necessary for regulating genes involved in osteoclast differentiation. Previously it was shown by others that Mitf translocates from the cytoplasm to the nucleus upon M-CSF/RANKL signaling in osteoclasts. Mitf's movement is regulated by its interaction with 14-3-3 and the kinase C-TAK1. Here we demonstrate that the related family member, Tfe3, does not shuttle from the cytoplasm to the nucleus and does not interact with C-TAK1. We also demonstrate that overexpression of C-TAK1 inhibits the expression of Acp5 while a kinase dead C-TAK1 or a Mitf mutant that cannot interact with C-TAK1 increased expression of Acp5. Finally, we show that the catalytic subunit of protein phosphatase 2A is up-regulated in osteoclasts with M-CSF/RANKL signaling, indicating a possible mechanism for dephosphorylating Mitf on its 14-3-3 binding site and allowing Mitf to be translocated to the nucleus of osteoclasts.
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Affiliation(s)
- Toni Schwarz
- Division of Orthodontics, Department of Developmental and Surgical Sciences, University of Minnesota School of Dentistry, 515 Delaware St. SE, Minneapolis, MN 55455, USA
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15
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Laughlin KM, Luo D, Liu C, Shaw G, Warrington KH, Law BK, Harrison JK. Hematopoietic- and neurologic-expressed sequence 1 (Hn1) depletion in B16.F10 melanoma cells promotes a differentiated phenotype that includes increased melanogenesis and cell cycle arrest. Differentiation 2009; 78:35-44. [PMID: 19427096 DOI: 10.1016/j.diff.2009.04.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Revised: 03/20/2009] [Accepted: 04/03/2009] [Indexed: 12/16/2022]
Abstract
The Hematopoietic- and neurologic-expressed sequence 1 (Hn1) gene encodes a small protein that is highly conserved among species. Hn1 expression is upregulated in regenerating neural tissues, including the axotomized adult rodent facial motor nerve and dedifferentiating retinal pigment epithelial cells of the Japanese newt. It is also expressed in numerous tissues during embryonic development as well as in regions of the adult brain that exhibit high plasticity. Hn1 has also been reported as a marker for human ovarian carcinoma and it is expressed in high-grade human gliomas. This study was directed toward understanding the function of Hn1 in a murine melanoma cell line. Hn1 mRNA and protein were identified in B16.F10 cells and in tumors formed from these cells. Inhibition of Hn1 protein expression with siRNA increased melanogenesis. Hn1-depleted cells expressed higher levels of the melanogenic proteins tyrosinase and Trp2 and an increased interaction between actin and Rab27a. The in vitro cell growth rate of Hn1-depleted cells was significantly reduced due to G1/S cell cycle arrest. This was consistent with a reduction in the phosphorylation of retinoblastoma protein as well as lower levels of p27 and increased expression of p21. Decreased expression of c-Met, the receptor for hepatocyte growth factor, was also detected in the Hn1-depleted cells, however HGF-dependent stimulation of phosphorylated-ERK was unaffected. Hn1 depletion also led to increased basal levels of phosphorylated p38 MAPK, while basal ERK phosphorylation was reduced. Moreover, Hn1-depleted cells had reduced expression of transcription factors MITF and USF-1, and increased expression of TFE3. These data, coupled with reports on Hn1 expression in regeneration and development, suggest that Hn1 functions as a suppressor of differentiation in cells undergoing repair or proliferation.
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Affiliation(s)
- Katharine M Laughlin
- Departments of Pharmacology & Therapeutics, University of Florida, College of Medicine, Gainesville, FL 32610-0267, USA
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16
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Medendorp K, van Groningen JJM, Schepens M, Vreede L, Thijssen J, Schoenmakers EFPM, van den Hurk WH, Geurts van Kessel A, Kuiper RP. Molecular mechanisms underlying the MiT translocation subgroup of renal cell carcinomas. Cytogenet Genome Res 2007; 118:157-65. [PMID: 18000366 DOI: 10.1159/000108296] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Accepted: 01/04/2007] [Indexed: 01/28/2023] Open
Abstract
Renal cell carcinomas (RCCs) represent a heterogeneous group of neoplasms, which differ in histological, pathologic and clinical characteristics. The tumors originate from different locations within the nephron and are accompanied by different recurrent (cyto)genetic anomalies. Recently, a novel subgroup of RCCs has been defined, i.e., the MiT translocation subgroup of RCCs. These tumors originate from the proximal tubule of the nephron, exhibit pleomorphic histological features including clear cell morphologies and papillary structures, and are found predominantly in children and young adults. In addition, these tumors are characterized by the occurrence of recurrent chromosomal translocations, which result in disruption and fusion of either the TFE3 or TFEB genes, both members of the MiT family of basic helix-loop-helix/leucine-zipper transcription factor genes. Hence the name MiT translocation subgroup of RCCs. In this review several features of this RCC subgroup will be discussed, including the molecular mechanisms that may underlie their development.
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Affiliation(s)
- K Medendorp
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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17
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Hohensinner PJ, Kaun C, Rychli K, Niessner A, Pfaffenberger S, Rega G, de Martin R, Maurer G, Ullrich R, Huber K, Wojta J. Macrophage colony stimulating factor expression in human cardiac cells is upregulated by tumor necrosis factor-alpha via an NF-kappaB dependent mechanism. J Thromb Haemost 2007; 5:2520-8. [PMID: 17922812 DOI: 10.1111/j.1538-7836.2007.02784.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Macrophage colony stimulating factor (M-CSF) is a key factor for monocyte and macrophage survival and proliferation. M-CSF has been implicated in cardiac healing and repair after myocardial infarction. METHODS AND RESULTS We show by immunohistochemistry and Western blotting analysis that M-CSF protein is present in human heart tissue. Cultured human adult cardiac myocytes (HACM) and human adult cardiac fibroblasts (HACF) isolated from human myocardial tissue constitutively express M-CSF. When HACM and HACF were treated with tumor necrosis factor-alpha (TNF-alpha) M-CSF protein production and M-CSF mRNA expression, determined by ELISA or by using RT-PCR, respectively, was significantly increased. To determine a possible role of nuclear factor kappaB (NF-kappaB) and activating protein 1 (AP-1) in M-CSF regulation, blockers to both pathways and an adenovirus overexpressing a dominant negative (dn) form of IkappaB kinase 2 (IKK2) were used. Only the NF-kappaB blocker dimethylfumarate and the dn IKK2, but not januskinase inhibitor-1 (JNK-I), were able to block the TNF-alpha-induced increase in M-CSF production in these cells, suggesting that the induction of M-CSF through TNF-alpha is mainly dependent on the activation of the NF-kappaB pathway. The monocyte activation marker CD11b was significantly increased after incubating U937 cells with conditioned medium from HACM or HACF as determined by FACS analysis. CONCLUSIONS Our in vitro data taken together with our immunohistochemistry data suggest that human cardiac cells constitutively express M-CSF. This expression of M-CSF in the human heart and its upregulation by TNF-alpha might contribute to monocyte and macrophage survival and differentiation.
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Affiliation(s)
- P J Hohensinner
- Department of Internal Medicine II, Medical University of Vienna, Waehringerguertel 18-20, Vienna, Austria
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18
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Saban R, Simpson C, Davis CA, Dozmorov I, Maier J, Fowler B, Ihnat MA, Hurst RE, Wershil BK, Saban MR. Transcription factor network downstream of protease activated receptors (PARs) modulating mouse bladder inflammation. BMC Immunol 2007; 8:17. [PMID: 17705868 PMCID: PMC2000913 DOI: 10.1186/1471-2172-8-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Accepted: 08/17/2007] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND All four PARs are present in the urinary bladder, and their expression is altered during inflammation. In order to search for therapeutic targets other than the receptors themselves, we set forth to determine TFs downstream of PAR activation in the C57BL/6 urinary bladders. METHODS For this purpose, we used a protein/DNA combo array containing 345 different TF consensus sequences. Next, the TF selected was validated by EMSA and IHC. As mast cells seem to play a fundamental role in bladder inflammation, we determined whether c-kit receptor deficient (Kit w/Kit w-v) mice have an abrogated response to PAR stimulation. Finally, TFEB antibody was used for CHIP/Q-PCR assay and revealed up-regulation of genes known to be downstream of TFEB. RESULTS TFEB, a member of the MiTF family of basic helix-loop-helix leucine zipper, was the only TF commonly up-regulated by all PAR-APs. IHC results confirm a correlation between inflammation and TFEB expression in C57BL/6 mice. In contrast, Kit w/Kit w-v mice did not exhibit inflammation in response to PAR activation. EMSA results confirmed the increased TFEB binding activity in C57BL/6 but not in Kit w/Kit w-v mice. CONCLUSION This is the first report describing the increased expression of TFEB in bladder inflammation in response to PAR activation. As TFEB belongs to a family of TFs essential for mast cell survival, our findings suggest that this molecule may influence the participation of mast cells in PAR-mediated inflammation and that targeting TFEB/MiTF activity may be a novel approach for the treatment of bladder inflammatory disorders.
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Affiliation(s)
- Ricardo Saban
- Department of Physiology, The University Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Cindy Simpson
- Department of Physiology, The University Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Carole A Davis
- Department of Physiology, The University Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Igor Dozmorov
- Oklahoma Medical Research Foundation (OMRF), Imaging Core Facility, Oklahoma City, Oklahoma 73104, USA
| | - Julie Maier
- Oklahoma Medical Research Foundation (OMRF), Arthritis and Immunology Research Program, Microarray/Euk. Genomics Core Facility, Oklahoma City, Oklahoma 73104. USA
| | - Ben Fowler
- Oklahoma Medical Research Foundation (OMRF), Arthritis and Immunology Research Program, Microarray/Euk. Genomics Core Facility, Oklahoma City, Oklahoma 73104. USA
| | - Michael A Ihnat
- Department of Cell Biology, The University Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Robert E Hurst
- Department of Urology, The University Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Barry K Wershil
- Albert Einstein College of Medicine Division of Pediatric GI and Nutrition The Children's Hospital at Montefiore Bronx, NY 10467, USA
| | - Marcia R Saban
- Department of Physiology, The University Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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