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Lautert-Dutra W, Melo CM, Chaves LP, Sousa FC, Crozier C, Dion D, Avante FS, Saggioro FP, dos Reis RB, Archangelo LF, Bayani J, Squire JA. Investigating the Role of SNAI1 and ZEB1 Expression in Prostate Cancer Progression and Immune Modulation of the Tumor Microenvironment. Cancers (Basel) 2024; 16:1480. [PMID: 38672562 PMCID: PMC11048607 DOI: 10.3390/cancers16081480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/03/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Prostate cancer (PCa) is an immunologically cold tumor and the molecular processes that underlie this behavior are poorly understood. In this study, we investigated a primary cohort of intermediate-risk PCa (n = 51) using two NanoString profiling panels designed to study cancer progression and immune response. We identified differentially expressed genes (DEGs) and pathways associated with biochemical recurrence (BCR) and clinical risk. Confirmatory analysis was performed using the TCGA-PRAD cohort. Noteworthy DEGs included collagens such as COL1A1, COL1A2, and COL3A1. Changes in the distribution of collagens may influence the immune activity in the tumor microenvironment (TME). In addition, immune-related DEGs such as THY1, IRF5, and HLA-DRA were also identified. Enrichment analysis highlighted pathways such as those associated with angiogenesis, TGF-beta, UV response, and EMT. Among the 39 significant DEGs, 11 (28%) were identified as EMT target genes for ZEB1 using the Harmonizome database. Elevated ZEB1 expression correlated with reduced BCR risk. Immune landscape analysis revealed that ZEB1 was associated with increased immunosuppressive cell types in the TME, such as naïve B cells and M2 macrophages. Increased expression of both ZEB1 and SNAI1 was associated with elevated immune checkpoint expression. In the future, modulation of EMT could be beneficial for overcoming immunotherapy resistance in a cold tumor, such as PCa.
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Affiliation(s)
- William Lautert-Dutra
- Department of Genetics, Faculty of Medicine at Ribeirão Preto, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (W.L.-D.); (C.M.M.); (L.P.C.)
| | - Camila Morais Melo
- Department of Genetics, Faculty of Medicine at Ribeirão Preto, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (W.L.-D.); (C.M.M.); (L.P.C.)
| | - Luiz Paulo Chaves
- Department of Genetics, Faculty of Medicine at Ribeirão Preto, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (W.L.-D.); (C.M.M.); (L.P.C.)
| | - Francisco Cesar Sousa
- Division of Urology, Department of Surgery and Anatomy, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (F.C.S.); (F.S.A.); (R.B.d.R.)
| | - Cheryl Crozier
- Diagnostic Development, Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada; (C.C.); (D.D.); (J.B.)
| | - Dan Dion
- Diagnostic Development, Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada; (C.C.); (D.D.); (J.B.)
| | - Filipe S. Avante
- Division of Urology, Department of Surgery and Anatomy, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (F.C.S.); (F.S.A.); (R.B.d.R.)
| | - Fabiano Pinto Saggioro
- Department of Pathology, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil;
| | - Rodolfo Borges dos Reis
- Division of Urology, Department of Surgery and Anatomy, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (F.C.S.); (F.S.A.); (R.B.d.R.)
| | - Leticia Fröhlich Archangelo
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil;
| | - Jane Bayani
- Diagnostic Development, Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada; (C.C.); (D.D.); (J.B.)
- Laboratory Medicine and Pathology, University of Toronto, Toronto, ON M5G 1E2, Canada
| | - Jeremy A. Squire
- Department of Genetics, Faculty of Medicine at Ribeirão Preto, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (W.L.-D.); (C.M.M.); (L.P.C.)
- Division of Urology, Department of Surgery and Anatomy, University of São Paulo (FMRP-USP), Ribeirão Preto 14049-900, SP, Brazil; (F.C.S.); (F.S.A.); (R.B.d.R.)
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L3N6, Canada
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Arfelli VC, Chang YC, Bagnoli JW, Kerbs P, Ciamponi FE, Paz LMDS, Pankivskyi S, de Matha Salone J, Maucuer A, Massirer KB, Enard W, Kuster B, Greif PA, Archangelo LF. UHMK1 is a novel splicing regulatory kinase. J Biol Chem 2023; 299:103041. [PMID: 36803961 PMCID: PMC10033318 DOI: 10.1016/j.jbc.2023.103041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 01/18/2023] [Accepted: 02/04/2023] [Indexed: 02/19/2023] Open
Abstract
The U2AF Homology Motif Kinase 1 (UHMK1) is the only kinase that contains the U2AF homology motif, a common protein interaction domain among splicing factors. Through this motif, UHMK1 interacts with the splicing factors SF1 and SF3B1, known to participate in the 3' splice site recognition during the early steps of spliceosome assembly. Although UHMK1 phosphorylates these splicing factors in vitro, the involvement of UHMK1 in RNA processing has not previously been demonstrated. Here, we identify novel putative substrates of this kinase and evaluate UHMK1 contribution to overall gene expression and splicing, by integrating global phosphoproteomics, RNA-seq, and bioinformatics approaches. Upon UHMK1 modulation, 163 unique phosphosites were differentially phosphorylated in 117 proteins, of which 106 are novel potential substrates of this kinase. Gene Ontology analysis showed enrichment of terms previously associated with UHMK1 function, such as mRNA splicing, cell cycle, cell division, and microtubule organization. The majority of the annotated RNA-related proteins are components of the spliceosome but are also involved in several steps of gene expression. Comprehensive analysis of splicing showed that UHMK1 affected over 270 alternative splicing events. Moreover, splicing reporter assay further supported UHMK1 function on splicing. Overall, RNA-seq data demonstrated that UHMK1 knockdown had a minor impact on transcript expression and pointed to UHMK1 function in epithelial-mesenchymal transition. Functional assays demonstrated that UHMK1 modulation affects proliferation, colony formation, and migration. Taken together, our data implicate UHMK1 as a splicing regulatory kinase, connecting protein regulation through phosphorylation and gene expression in key cellular processes.
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Affiliation(s)
- Vanessa C Arfelli
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo (FMRP-USP), Ribeirão Preto, São Paulo, Brazil
| | - Yun-Chien Chang
- Proteomics and Bioanalytics, School of Life Sciences Weihenstephan, Technical University of Munich (TUM), Freising, Germany
| | - Johannes W Bagnoli
- Anthropology & Human Genomics, Department of Biology II, Ludwig-Maximilians-University (LMU), Martinsried, Germany
| | - Paul Kerbs
- Laboratory for Experimental Leukemia and Lymphoma Research, Munich University Hospital, Ludwig-Maximilians University (LMU), Munich, Germany; German Cancer Consortium (DKTK), partner site Munich, Munich, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Felipe E Ciamponi
- Center for Medicinal Chemistry (CQMED), Center for Molecular Biology and Genetic Engineering (CBMEG), University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Laissa M da S Paz
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo (FMRP-USP), Ribeirão Preto, São Paulo, Brazil
| | - Serhii Pankivskyi
- SABNP, Univ Evry, INSERM U1204, Université Paris-Saclay, Evry, France
| | | | - Alexandre Maucuer
- SABNP, Univ Evry, INSERM U1204, Université Paris-Saclay, Evry, France
| | - Katlin B Massirer
- Center for Medicinal Chemistry (CQMED), Center for Molecular Biology and Genetic Engineering (CBMEG), University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Wolfgang Enard
- Anthropology & Human Genomics, Department of Biology II, Ludwig-Maximilians-University (LMU), Martinsried, Germany
| | - Bernhard Kuster
- Proteomics and Bioanalytics, School of Life Sciences Weihenstephan, Technical University of Munich (TUM), Freising, Germany
| | - Philipp A Greif
- Laboratory for Experimental Leukemia and Lymphoma Research, Munich University Hospital, Ludwig-Maximilians University (LMU), Munich, Germany; German Cancer Consortium (DKTK), partner site Munich, Munich, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Leticia Fröhlich Archangelo
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo (FMRP-USP), Ribeirão Preto, São Paulo, Brazil.
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Serafim RB, Cardoso C, Arfelli VC, Valente V, Archangelo LF. PIMREG expression level predicts glioblastoma patient survival and affects temozolomide resistance and DNA damage response. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166382. [DOI: 10.1016/j.bbadis.2022.166382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 11/16/2022]
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Barbutti I, Xavier-Ferrucio JM, Machado-Neto JA, Ricon L, Traina F, Bohlander SK, Saad STO, Archangelo LF. CATS (FAM64A) abnormal expression reduces clonogenicity of hematopoietic cells. Oncotarget 2018; 7:68385-68396. [PMID: 27588395 PMCID: PMC5356563 DOI: 10.18632/oncotarget.11724] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 08/21/2016] [Indexed: 11/25/2022] Open
Abstract
The CATS (FAM64A) protein interacts with CALM (PICALM) and the leukemic fusion protein CALM/AF10. CATS is highly expressed in leukemia, lymphoma and tumor cell lines and its protein levels strongly correlates with cellular proliferation in both malignant and normal cells. In order to obtain further insight into CATS function we performed an extensive analysis of CATS expression during differentiation of leukemia cell lines. While CATS expression decreased during erythroid, megakaryocytic and monocytic differentiation, a markedly increase was observed in the ATRA induced granulocytic differentiation. Lentivirus mediated silencing of CATS in U937 cell line resulted in somewhat reduced proliferation, altered cell cycle progression and lower migratory ability in vitro; however was not sufficient to inhibit tumor growth in xenotransplant model. Of note, CATS knockdown resulted in reduced clonogenicity of CATS-silenced cells and reduced expression of the self-renewal gene, GLI-1. Moreover, retroviral mediated overexpression of the murine Cats in primary bone marrow cells lead to decreased colony formation. Although our in vitro data suggests that CATS play a role in cellular processes important for tumorigenesis, such as cell cycle control and clonogenicity, these effects were not observed in vivo.
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Affiliation(s)
- Isabella Barbutti
- Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Carlos Chagas 480, Campinas-SP, Brazil
| | - Juliana M Xavier-Ferrucio
- Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Carlos Chagas 480, Campinas-SP, Brazil
| | - João Agostinho Machado-Neto
- Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Carlos Chagas 480, Campinas-SP, Brazil
| | - Lauremilia Ricon
- Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Carlos Chagas 480, Campinas-SP, Brazil
| | - Fabiola Traina
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Stefan K Bohlander
- Department of Molecular Medicine and Pathology, The University of Auckland, Auckland, New Zealand
| | - Sara Teresinha Olalla Saad
- Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Carlos Chagas 480, Campinas-SP, Brazil
| | - Leticia Fröhlich Archangelo
- Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Carlos Chagas 480, Campinas-SP, Brazil.,Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Barbutti I, Machado-Neto JA, Arfelli VC, de Melo Campos P, Traina F, Saad STO, Archangelo LF. The U2AF homology motif kinase 1 (UHMK1) is upregulated upon hematopoietic cell differentiation. Biochim Biophys Acta Mol Basis Dis 2018; 1864:959-966. [PMID: 29307747 DOI: 10.1016/j.bbadis.2018.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/10/2017] [Accepted: 01/03/2018] [Indexed: 01/05/2023]
Abstract
UHMK1 (KIS) is a nuclear serine/threonine kinase that possesses a U2AF homology motif and phosphorylates and regulates the activity of the splicing factors SF1 and SF3b155. Mutations in these components of the spliceosome machinery have been recently implicated in leukemogenesis. The fact that UHMK1 regulates these factors suggests that UHMK1 might be involved in RNA processing and perhaps leukemogenesis. Here we analyzed UHMK1 expression in normal hematopoietic and leukemic cells as well as its function in leukemia cell line. In the normal hematopoietic compartment, markedly higher levels of transcripts were observed in differentiated lymphocytes (CD4+, CD8+ and CD19+) compared to the progenitor enriched subpopulation (CD34+) or leukemia cell lines. UHMK1 expression was upregulated in megakaryocytic-, monocytic- and granulocytic-induced differentiation of established leukemia cell lines and in erythrocytic-induced differentiation of CD34+ cells. No aberrant expression was observed in patient samples of myelodysplastic syndrome (MDS), acute myeloid (AML) or lymphoblastic (ALL) leukemia. Nonetheless, in MDS patients, increased levels of UHMK1 expression positively impacted event free and overall survival. Lentivirus mediated UHMK1 knockdown did not affect proliferation, cell cycle progression, apoptosis or migration of U937 leukemia cells, although UHMK1 silencing strikingly increased clonogenicity of these cells. Thus, our results suggest that UHMK1 plays a role in hematopoietic cell differentiation and suppression of autonomous clonal growth of leukemia cells.
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Affiliation(s)
- Isabella Barbutti
- Hematology and Transfusion Medicine Center, State University of Campinas (UNICAMP), Carlos Chagas 480, 13083-878 Campinas, SP, Brazil
| | - João Agostinho Machado-Neto
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Vanessa Cristina Arfelli
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Paula de Melo Campos
- Hematology and Transfusion Medicine Center, State University of Campinas (UNICAMP), Carlos Chagas 480, 13083-878 Campinas, SP, Brazil
| | - Fabiola Traina
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Sara Teresinha Olalla Saad
- Hematology and Transfusion Medicine Center, State University of Campinas (UNICAMP), Carlos Chagas 480, 13083-878 Campinas, SP, Brazil
| | - Leticia Fröhlich Archangelo
- Hematology and Transfusion Medicine Center, State University of Campinas (UNICAMP), Carlos Chagas 480, 13083-878 Campinas, SP, Brazil; Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Lazarini M, Machado-Neto JA, Archangelo LF, Mendes-Silva BF, Bigarella CL, Traina F, Saad STO. PTK2 and PTPN11 expression in myelodysplastic syndromes. Clinics (Sao Paulo) 2013; 68:1371-5. [PMID: 24212846 PMCID: PMC3798691 DOI: 10.6061/clinics/2013(10)13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 06/25/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the expression of protein tyrosine kinase 2 and protein tyrosine phosphatase non-receptor type 11, which respectively encode focal adhesion kinase protein and src homology 2 domain-containing protein-tyrosine phosphatase 2, in hematopoietic cells from patients with myelodysplastic syndromes. METHODS Protein tyrosine kinase 2 and tyrosine phosphatase non-receptor type 11 expressions were analyzed by quantitative polymerase chain reaction in bone marrow cells from patients with myelodysplastic syndromes and healthy donors. RESULTS Protein tyrosine kinase 2 and tyrosine phosphatase non-receptor type 11 expressions did not significantly differ between normal cells and myelodysplastic cells. CONCLUSIONS Our data suggest that despite the relevance of focal adhesion kinase and src homology 2 domain-containing protein-tyrosine phosphatase 2 in hematopoietic disorders, their mRNA expression do not significantly differ between total bone marrow cells from patients with myelodysplastic syndromes and healthy donors.
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Affiliation(s)
- Mariana Lazarini
- Hematology and Hemotherapy Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, CampinasSP, Brazil
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Archangelo LF, Greif PA, Maucuer A, Manceau V, Koneru N, Bigarella CL, Niemann F, dos Santos MT, Kobarg J, Bohlander SK, Saad STO. The CATS (FAM64A) protein is a substrate of the Kinase Interacting Stathmin (KIS). Biochim Biophys Acta 2013; 1833:1269-79. [PMID: 23419774 DOI: 10.1016/j.bbamcr.2013.02.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 01/21/2013] [Accepted: 02/08/2013] [Indexed: 12/22/2022]
Abstract
The CATS protein (also known as FAM64A and RCS1) was first identified as a novel CALM (PICALM) interactor that influences the subcellular localization of the leukemogenic fusion protein CALM/AF10. CATS is highly expressed in cancer cell lines in a cell cycle dependent manner and is induced by mitogens. CATS is considered a marker for proliferation, known to control the metaphase-to-anaphase transition during the cell division. Using CATS as a bait in a yeast two-hybrid screen we identified the Kinase Interacting Stathmin (KIS or UHMK1) protein as a CATS interacting partner. The interaction between CATS and KIS was confirmed by GST pull-down, co-immunoprecipitation and co-localization experiments. Using kinase assay we showed that CATS is a substrate of KIS and mapped the phosphorylation site to CATS serine 131 (S131). Protein expression analysis revealed that KIS levels changed in a cell cycle-dependent manner and in the opposite direction to CATS levels. In a reporter gene assay KIS was able to enhance the transcriptional repressor activity of CATS, independent of CATS phophorylation at S131. Moreover, we showed that CATS and KIS antagonize the transactivation capacity of CALM/AF10.In summary, our results show that CATS interacts with and is a substrate for KIS, suggesting that KIS regulates CATS function.
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Machado-Neto JA, Favaro P, Lazarini M, da Silva Santos Duarte A, Archangelo LF, Lorand-Metze I, Costa FF, Saad STO, Traina F. Downregulation of IRS2 in myelodysplastic syndrome: A possible role in impaired hematopoietic cell differentiation. Leuk Res 2012; 36:931-5. [DOI: 10.1016/j.leukres.2012.03.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 03/01/2012] [Accepted: 03/06/2012] [Indexed: 11/30/2022]
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Archangelo LF, Greif PA, Hölzel M, Harasim T, Kremmer E, Przemeck GKH, Eick D, Deshpande AJ, Buske C, de Angelis MH, Saad STO, Bohlander SK. The CALM and CALM/AF10 interactor CATS is a marker for proliferation. Mol Oncol 2008; 2:356-67. [PMID: 19383357 DOI: 10.1016/j.molonc.2008.08.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Revised: 08/26/2008] [Accepted: 08/27/2008] [Indexed: 01/05/2023] Open
Abstract
The CATS protein was recently identified as a novel CALM interacting protein. CATS increases the nuclear and specifically the nucleolar localization of the leukemogenic CALM/AF10 fusion protein. We cloned and characterized the murine Cats gene. Detailed analysis of murine Cats expression during mouse embryogenesis showed an association with rapidly proliferating tissues. Interestingly, the Cats transcript is highly expressed in murine hematopoietic cells transformed by CALM/AF10. The CATS protein is highly expressed in leukemia, lymphoma and tumor cell lines but not in non-proliferating T-cells or human peripheral blood lymphocytes. CATS protein levels are cell cycle dependent and it is induced by mitogens, suggesting a role of CATS in the control of cell proliferation and possibly CALM/AF10-mediated leukemogenesis.
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Affiliation(s)
- Leticia Fröhlich Archangelo
- Department of Medicine III, University of Munich Hospital Grosshadern, German Research Center for Environmental Health, Munich, Germany
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Putnik J, Zhang CD, Archangelo LF, Tizazu B, Bartels S, Kickstein M, Greif PA, Bohlander SK. The interaction of ETV6 (TEL) and TIP60 requires a functional histone acetyltransferase domain in TIP60. Biochim Biophys Acta 2007; 1772:1211-24. [PMID: 17980166 DOI: 10.1016/j.bbadis.2007.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 09/25/2007] [Accepted: 09/27/2007] [Indexed: 12/19/2022]
Abstract
The ets-family transcription factor ETV6 (TEL) has been shown to be the target of a large number of balanced chromosomal translocations in various hematological malignancies and in some soft tissue tumors. Furthermore, ETV6 is essential for hematopoietic stem cell function. We identified ETV6 interacting proteins using the yeast two hybrid system. One of these proteins is the HIV Tat interacting protein (TIP60), a histone acetyltransferase (HAT) containing the highly conserved MYST domain. TIP60 functions as a corepressor of ETV6 in reporter gene assays. Fluorescently tagged ETV6 and TIP60 colocalize in the nucleus and an increase in nuclear localization of ETV6 was seen when TIP60 was cotransfected. ETV6 interacts with TIP60 through a 63 amino acids region located in the central domain of ETV6 between the pointed and the ets domain. The ETV6 interacting region of TIP60 mapped to the C2HC zinc finger of the TIP60 MYST domain. The interaction of TIP60 with full length ETV6 required an intact acetyltransferase domain of TIP60. Interestingly, the MYST domains of MOZ and MORF were also able to interact with portions of ETV6. These observations suggest that MYST domain HATs regulate ETV6 transcriptional activity and may therefore play critical roles in leukemogenesis and possibly in normal hematopoietic development.
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Affiliation(s)
- Jasmina Putnik
- Institute of Human Genetics, Heinrich-Düker-Weg 12, 37037 Göttingen, Germany
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