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Pan L, Mulaw MA, Gout J, Guo M, Zarrin H, Schwarz P, Baumann B, Seufferlein T, Wagner M, Oswald F. RBPJ Deficiency Sensitizes Pancreatic Acinar Cells to KRAS-Mediated Pancreatic Intraepithelial Neoplasia Initiation. Cell Mol Gastroenterol Hepatol 2023; 16:783-807. [PMID: 37543088 PMCID: PMC10520364 DOI: 10.1016/j.jcmgh.2023.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 08/07/2023]
Abstract
BACKGROUND AND AIMS Development of pancreatic ductal adenocarcinoma (PDAC) is a multistep process intensively studied; however, precocious diagnosis and effective therapy still remain unsatisfactory. The role for Notch signaling in PDAC has been discussed controversially, as both cancer-promoting and cancer-antagonizing functions have been described. Thus, an improved understanding of the underlying molecular mechanisms is necessary. Here, we focused on RBPJ, the receiving transcription factor in the Notch pathway, examined its expression pattern in PDAC, and characterized its function in mouse models of pancreatic cancer development and in the regeneration process after acute pancreatitis. METHODS Conditional transgenic mouse models were used for functional analysis of RBPJ in the adult pancreas, initiation of PDAC precursor lesions, and pancreatic regeneration. Pancreata and primary acinar cells were tested for acinar-to-ductal metaplasia together with immunohistology and comprehensive transcriptional profiling by RNA sequencing. RESULTS We identified reduced RBPJ expression in a subset of human PDAC specimens. Ptf1α-CreERT-driven depletion of RBPJ in transgenic mice revealed that its function is dispensable for the homeostasis and maintenance of adult acinar cells. However, primary RBPJ-deficient acinar cells underwent acinar-to-ductal differentiation in ex vivo. Importantly, oncogenic KRAS expression in the context of RBPJ deficiency facilitated the development of pancreatic intraepithelial neoplasia lesions with massive fibrotic stroma formation. Interestingly, RNA-sequencing data revealed a transcriptional profile associated with the cytokine/chemokine and extracellular matrix changes. In addition, lack of RBPJ delays the course of acute pancreatitis and critically impairs it in the context of KRASG12D expression. CONCLUSIONS Our findings imply that downregulation of RBPJ in PDAC patients derepresses Notch targets and promotes KRAS-mediated pancreatic acinar cells transformation and desmoplasia development.
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Affiliation(s)
- Leiling Pan
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Medhanie A Mulaw
- Unit for Single-cell Genomics, Medical Faculty, Ulm University, Ulm, Germany
| | - Johann Gout
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Min Guo
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Hina Zarrin
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Peggy Schwarz
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Bernd Baumann
- Institute of Physiological Chemistry, Ulm University, Ulm, Germany
| | - Thomas Seufferlein
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Martin Wagner
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany.
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2
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Schlett JS, Mettang M, Skaf A, Schweizer P, Errerd A, Mulugeta EA, Hein TM, Tsesmelis K, Tsesmelis M, Büttner UFG, Wendt H, Abaei A, Rasche V, Prex V, Nespoli E, Alami NO, Tews D, Walther P, Yilmazer-Hanke D, Oswald F, Dimou L, Wirth T, Baumann B. NF-κB is a critical mediator of post-mitotic senescence in oligodendrocytes and subsequent white matter loss. Mol Neurodegener 2023; 18:24. [PMID: 37069623 PMCID: PMC10108549 DOI: 10.1186/s13024-023-00616-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [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: 10/11/2022] [Accepted: 03/25/2023] [Indexed: 04/19/2023] Open
Abstract
BACKGROUND Inflammaging represents an accepted concept where the immune system shifts to a low-grade chronic pro-inflammatory state without overt infection upon aging. In the CNS, inflammaging is mainly driven by glia cells and associated with neurodegenerative processes. White matter degeneration (WMD), a well-known process in the aging brain, manifests in myelin loss finally resulting in motor, sensory and cognitive impairments. Oligodendrocytes (OL) are responsible for homeostasis and maintenance of the myelin sheaths, which is a complex and highly energy demanding process sensitizing these cells to metabolic, oxidative and other forms of stress. Yet, the immediate impact of chronic inflammatory stress like inflammaging on OL homeostasis, myelin maintenance and WMD remains open. METHODS To functionally analyze the role of IKK/NF-κB signaling in the regulation of myelin homeostasis and maintenance in the adult CNS, we established a conditional mouse model allowing NF-κB activation in mature myelinating oligodendrocytes. IKK2-CAPLP-CreERT2 mice were characterized by biochemical, immunohistochemical, ultrastructural and behavioral analyses. Transcriptome data from isolated, primary OLs and microglia cells were explored by in silico pathway analysis and validated by complementary molecular approaches. RESULTS Chronic NF-κB activation in mature OLs leads to aggravated neuroinflammatory conditions phenocopying brain inflammaging. As a consequence, IKK2-CAPLP-CreERT2 mice showed specific neurological deficits and impaired motoric learning. Upon aging, persistent NF-κB signaling promotes WMD in these mice as ultrastructural analysis revealed myelination deficits in the corpus callosum accompanied by impaired myelin protein expression. RNA-Seq analysis of primary oligodendrocytes and microglia cells uncovers gene expression signatures associated with activated stress responses and increased post mitotic cellular senescence (PoMiCS) which was confirmed by elevated senescence-associated β-galactosidase activity and SASP gene expression profile. We identified an elevated integrated stress response (ISR) characterized by phosphorylation of eIF2α as a relevant molecular mechanism which is able to affect translation of myelin proteins. CONCLUSIONS Our findings demonstrate an essential role of IKK/NF-κB signaling in mature, post-mitotic OLs in regulating stress-induced senescence in these cells. Moreover, our study identifies PoMICS as an important driving force of age-dependent WMD as well as of traumatic brain injury induced myelin defects.
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Affiliation(s)
- Judith Stefanie Schlett
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Melanie Mettang
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Aladdin Skaf
- Molecular and Translational Neuroscience, Department of Neurology, University Medical Center Ulm, 89081, Ulm, Germany
| | - Pavel Schweizer
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Alina Errerd
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | | | - Tabea Melissa Hein
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Konstantinos Tsesmelis
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Miltiadis Tsesmelis
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Ulrike F G Büttner
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Heinrich Wendt
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Alireza Abaei
- Core Facility Small Animal Imaging (CF-SANI), Ulm University, 89081, Ulm, Germany
| | - Volker Rasche
- Core Facility Small Animal Imaging (CF-SANI), Ulm University, 89081, Ulm, Germany
| | - Vivien Prex
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Ester Nespoli
- Molecular and Translational Neuroscience, Department of Neurology, University Medical Center Ulm, 89081, Ulm, Germany
| | - Najwa Ouali Alami
- Institute of Clinical Neuroanatomy, Ulm University, Helmholtzstraße 8/1, 89081, Ulm, Germany
| | - Daniel Tews
- Core Facility Extracellular Flux Analyzer, Ulm University Medical Center, 89081, Ulm, Germany
| | - Paul Walther
- Central Facility for Electron Microscopy, Ulm University, 89081, Ulm, Germany
| | - Deniz Yilmazer-Hanke
- Institute of Clinical Neuroanatomy, Ulm University, Helmholtzstraße 8/1, 89081, Ulm, Germany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, 89081, Ulm, Germany
| | - Leda Dimou
- Molecular and Translational Neuroscience, Department of Neurology, University Medical Center Ulm, 89081, Ulm, Germany
| | - Thomas Wirth
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Bernd Baumann
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany.
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3
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Hall D, Giaimo BD, Park SS, Hemmer W, Friedrich T, Ferrante F, Bartkuhn M, Yuan Z, Oswald F, Borggrefe T, Rual JF, Kovall R. The structure, binding and function of a Notch transcription complex involving RBPJ and the epigenetic reader protein L3MBTL3. Nucleic Acids Res 2022; 50:13083-13099. [PMID: 36477367 PMCID: PMC9825171 DOI: 10.1093/nar/gkac1137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 10/01/2022] [Accepted: 11/14/2022] [Indexed: 12/13/2022] Open
Abstract
The Notch pathway transmits signals between neighboring cells to elicit downstream transcriptional programs. Notch is a major regulator of cell fate specification, proliferation, and apoptosis, such that aberrant signaling leads to a pleiotropy of human diseases, including developmental disorders and cancers. The pathway signals through the transcription factor CSL (RBPJ in mammals), which forms an activation complex with the intracellular domain of the Notch receptor and the coactivator Mastermind. CSL can also function as a transcriptional repressor by forming complexes with one of several different corepressor proteins, such as FHL1 or SHARP in mammals and Hairless in Drosophila. Recently, we identified L3MBTL3 as a bona fide RBPJ-binding corepressor that recruits the repressive lysine demethylase LSD1/KDM1A to Notch target genes. Here, we define the RBPJ-interacting domain of L3MBTL3 and report the 2.06 Å crystal structure of the RBPJ-L3MBTL3-DNA complex. The structure reveals that L3MBTL3 interacts with RBPJ via an unusual binding motif compared to other RBPJ binding partners, which we comprehensively analyze with a series of structure-based mutants. We also show that these disruptive mutations affect RBPJ and L3MBTL3 function in cells, providing further insights into Notch mediated transcriptional regulation.
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Affiliation(s)
- Daniel Hall
- University of Cincinnati College of Medicine, Department of Molecular Genetics, Biochemistry and Microbiology, Cincinnati, OH, USA
| | | | - Sung-Soo Park
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Wiebke Hemmer
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine 1, Albert-Einstein-Allee 23, 89081Ulm, Germany
| | - Tobias Friedrich
- Institute of Biochemistry, University of Giessen, 35392 Giessen, Germany
| | - Francesca Ferrante
- Institute of Biochemistry, University of Giessen, 35392 Giessen, Germany
| | - Marek Bartkuhn
- Biomedical Informatics and Systems Medicine, University of Giessen, 35392 Giessen, Germany
| | - Zhenyu Yuan
- University of Cincinnati College of Medicine, Department of Molecular Genetics, Biochemistry and Microbiology, Cincinnati, OH, USA
| | - Franz Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine 1, Albert-Einstein-Allee 23, 89081Ulm, Germany
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, 35392 Giessen, Germany
| | - Jean-François Rual
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Rhett A Kovall
- To whom correspondence should be addressed. Tel: +1 513 558 4631;
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4
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Gagliani EK, Gutzwiller LM, Kuang Y, Odaka Y, Hoffmeister P, Hauff S, Turkiewicz A, Harding-Theobald E, Dolph PJ, Borggrefe T, Oswald F, Gebelein B, Kovall RA. A Drosophila Su(H) model of Adams-Oliver Syndrome reveals cofactor titration as a mechanism underlying developmental defects. PLoS Genet 2022; 18:e1010335. [PMID: 35951645 PMCID: PMC9398005 DOI: 10.1371/journal.pgen.1010335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 08/23/2022] [Accepted: 07/11/2022] [Indexed: 12/02/2022] Open
Abstract
Notch signaling is a conserved pathway that converts extracellular receptor-ligand interactions into changes in gene expression via a single transcription factor (CBF1/RBPJ in mammals; Su(H) in Drosophila). In humans, RBPJ variants have been linked to Adams-Oliver syndrome (AOS), a rare autosomal dominant disorder characterized by scalp, cranium, and limb defects. Here, we found that a previously described Drosophila Su(H) allele encodes a missense mutation that alters an analogous residue found in an AOS-associated RBPJ variant. Importantly, genetic studies support a model that heterozygous Drosophila with the AOS-like Su(H) allele behave in an opposing manner to heterozygous flies with a Su(H) null allele, due to a dominant activity of sequestering either the Notch co-activator or the antagonistic Hairless co-repressor. Consistent with this model, AOS-like Su(H) and Rbpj variants have decreased DNA binding activity compared to wild type proteins, but these variants do not significantly alter protein binding to the Notch co-activator or the fly and mammalian co-repressors, respectively. Taken together, these data suggest a cofactor sequestration mechanism underlies AOS phenotypes associated with RBPJ variants, whereby the AOS-associated RBPJ allele encodes a protein with compromised DNA binding activity that retains cofactor binding, resulting in Notch target gene dysregulation. Adams-Oliver Syndrome (AOS) is a rare disease defined by missing skin/skull tissue, limb malformations, and cardiovascular abnormalities. Human genetic studies have revealed that ~40% of AOS patients inherit dominant mutations within specific genes in the Notch signaling pathway. Notch signaling is a highly conserved cell-to-cell communication pathway found in all metazoans and plays crucial roles during embryogenesis and tissue homeostasis in organisms from Drosophila (fruit-flies) to mammals. The Notch receptor converts cell-to-cell interactions into a Notch signal that enters the nucleus and activates target genes by binding to a highly conserved transcription factor. Here, we took advantage of the unexpected finding that a previously described dominant allele in the Drosophila Notch pathway transcription factor contains a missense variant in an analogous residue found in a family with AOS. Using this novel animal model of AOS along with biochemical DNA binding, protein-protein interaction, and transcriptional reporter assays, we found that this transcription factor variant selectively compromises DNA binding but not binding to the Notch signal nor binding to other proteins in the Notch pathway. Taken together with prior human genetic studies, these data suggest AOS phenotypes associated with variants in the Notch pathway transcription factor are caused by a dominant mechanism that sequesters the Notch signal, leading to Notch target gene dysregulation.
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Affiliation(s)
- Ellen K. Gagliani
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Lisa M. Gutzwiller
- Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Yi Kuang
- Graduate program in Molecular and Developmental Biology, Cincinnati Children’s Hospital Research Foundation, Cincinnati, Ohio, United States of America
| | - Yoshinobu Odaka
- Biology Department, University of Cincinnati Blue Ash College, Cincinnati, Ohio, United States of America
| | - Phillipp Hoffmeister
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine, Ulm, Germany
| | - Stefanie Hauff
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine, Ulm, Germany
| | | | - Emily Harding-Theobald
- Department of Biology, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Patrick J. Dolph
- Department of Biology, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Giessen, Germany
| | - Franz Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine, Ulm, Germany
| | - Brian Gebelein
- Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- * E-mail: (BG); (RAK)
| | - Rhett A. Kovall
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- * E-mail: (BG); (RAK)
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5
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Ferrante F, Giaimo BD, Friedrich T, Sugino T, Mertens D, Kugler S, Gahr BM, Just S, Pan L, Bartkuhn M, Potente M, Oswald F, Borggrefe T. Hydroxylation of the NOTCH1 intracellular domain regulates Notch signaling dynamics. Cell Death Dis 2022; 13:600. [PMID: 35821235 PMCID: PMC9276811 DOI: 10.1038/s41419-022-05052-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 06/22/2022] [Accepted: 06/28/2022] [Indexed: 01/21/2023]
Abstract
Notch signaling plays a pivotal role in the development and, when dysregulated, it contributes to tumorigenesis. The amplitude and duration of the Notch response depend on the posttranslational modifications (PTMs) of the activated NOTCH receptor - the NOTCH intracellular domain (NICD). In normoxic conditions, the hydroxylase FIH (factor inhibiting HIF) catalyzes the hydroxylation of two asparagine residues of the NICD. Here, we investigate how Notch-dependent gene transcription is regulated by hypoxia in progenitor T cells. We show that the majority of Notch target genes are downregulated upon hypoxia. Using a hydroxyl-specific NOTCH1 antibody we demonstrate that FIH-mediated NICD1 hydroxylation is reduced upon hypoxia or treatment with the hydroxylase inhibitor dimethyloxalylglycine (DMOG). We find that a hydroxylation-resistant NICD1 mutant is functionally impaired and more ubiquitinated. Interestingly, we also observe that the NICD1-deubiquitinating enzyme USP10 is downregulated upon hypoxia. Moreover, the interaction between the hydroxylation-defective NICD1 mutant and USP10 is significantly reduced compared to the NICD1 wild-type counterpart. Together, our data suggest that FIH hydroxylates NICD1 in normoxic conditions, leading to the recruitment of USP10 and subsequent NICD1 deubiquitination and stabilization. In hypoxia, this regulatory loop is disrupted, causing a dampened Notch response.
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Affiliation(s)
- Francesca Ferrante
- grid.8664.c0000 0001 2165 8627Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Benedetto Daniele Giaimo
- grid.8664.c0000 0001 2165 8627Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Tobias Friedrich
- grid.8664.c0000 0001 2165 8627Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany ,Biomedical Informatics and Systems Medicine, Science Unit for Basic and Clinical Medicine, Aulweg 128, 35392 Giessen, Germany
| | - Toshiya Sugino
- grid.418032.c0000 0004 0491 220XMax Planck Institute for Heart and Lung Research, Angiogenesis and Metabolism Laboratory, Ludwigstr. 43, 61231 Bad Nauheim, Germany
| | - Daniel Mertens
- grid.410712.10000 0004 0473 882XUniversity Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, Albert-Einstein-Allee 23, 89081 Ulm, Germany ,grid.7497.d0000 0004 0492 0584German Cancer Research Center (DKFZ), Bridging Group Mechanisms of Leukemogenesis, B061, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Sabrina Kugler
- grid.410712.10000 0004 0473 882XUniversity Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Bernd Martin Gahr
- grid.410712.10000 0004 0473 882XUniversity Medical Center Ulm, Center for Internal Medicine, Molecular Cardiology, Department of Internal Medicine II, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Steffen Just
- grid.410712.10000 0004 0473 882XUniversity Medical Center Ulm, Center for Internal Medicine, Molecular Cardiology, Department of Internal Medicine II, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Leiling Pan
- grid.410712.10000 0004 0473 882XUniversity Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Marek Bartkuhn
- Biomedical Informatics and Systems Medicine, Science Unit for Basic and Clinical Medicine, Aulweg 128, 35392 Giessen, Germany ,Institute for Lung Health (ILH), Aulweg 132, 35392 Giessen, Germany
| | - Michael Potente
- grid.418032.c0000 0004 0491 220XMax Planck Institute for Heart and Lung Research, Angiogenesis and Metabolism Laboratory, Ludwigstr. 43, 61231 Bad Nauheim, Germany ,grid.484013.a0000 0004 6879 971XBerlin Institute of Health (BIH) at Charité-Universitätsmedizin Berlin, Berlin, Germany ,grid.419491.00000 0001 1014 0849Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany
| | - Franz Oswald
- grid.410712.10000 0004 0473 882XUniversity Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Tilman Borggrefe
- grid.8664.c0000 0001 2165 8627Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
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6
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Kaymak T, Kaya B, Wuggenig P, Nuciforo S, Göldi A, Oswald F, Roux J, Noti M, Melhem H, Hruz P, Niess JH. IL-20 subfamily cytokines impair the oesophageal epithelial barrier by diminishing filaggrin in eosinophilic oesophagitis. Gut 2022; 72:821-833. [PMID: 35613844 PMCID: PMC10086458 DOI: 10.1136/gutjnl-2022-327166] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/02/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Disruption of the epithelial barrier plays an essential role in developing eosinophilic oesophagitis (EoE), a disease defined by type 2 helper T cell (Th2)-mediated food-associated and aeroallergen-associated chronic inflammation. Although an increased expression of interleukin (IL)-20 subfamily members, IL-19, IL-20 and IL-24, in Th2-mediated diseases has been reported, their function in EoE remains unknown. DESIGN Combining transcriptomic, proteomic and functional analyses, we studied the importance of the IL-20 subfamily for EoE using patient-derived oesophageal three-dimensional models and an EoE mouse model. RESULTS Patients with active EoE have increased expression of IL-20 subfamily cytokines in the oesophagus and serum. In patient-derived oesophageal organoids stimulated with IL-20 cytokines, RNA sequencing and mass spectrometry revealed a downregulation of genes and proteins forming the cornified envelope, including filaggrins. On the contrary, abrogation of IL-20 subfamily signalling in Il20R2 -/- animals resulted in attenuated experimental EoE reflected by reduced eosinophil infiltration, lower Th2 cytokine expression and preserved expression of filaggrins in the oesophagus. Mechanistically, these observations were mediated by the mitogen-activated protein kinase (MAPK); extracellular-signal regulated kinases (ERK)1/2) pathway. Its blockade prevented epithelial barrier impairment in patient-derived air-liquid interface cultures stimulated with IL-20 cytokines and attenuated experimental EoE in mice. CONCLUSION Our findings reveal a previously unknown regulatory role of the IL-20 subfamily for oesophageal barrier function in the context of EoE. We propose that aberrant IL-20 subfamily signalling disturbs the oesophageal epithelial barrier integrity and promotes EoE development. Our study suggests that specific targeting of the IL-20 subfamily signalling pathway may present a novel strategy for the treatment of EoE.
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Affiliation(s)
- Tanay Kaymak
- Department of Biomedicine, Gastroenterology, University of Basel, Basel, Switzerland
| | - Berna Kaya
- Department of Biomedicine, Gastroenterology, University of Basel, Basel, Switzerland
| | - Philipp Wuggenig
- Department of Biomedicine, Gastroenterology, University of Basel, Basel, Switzerland
| | - Sandro Nuciforo
- Department of Biomedicine, Hepatology, University of Basel, Basel, Switzerland
| | - Andreas Göldi
- Department of Gastroenterology, Clarunis - University Center for Gastrointestinal and Liver Diseases, Basel, Switzerland
| | | | - Franz Oswald
- Department of Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | - Julien Roux
- Department of Biomedicine, Gastroenterology, University of Basel, Basel, Switzerland.,Swiss Institute of Bioinformatics, Basel, Switzerland
| | - Mario Noti
- Institute of Pathology, University of Bern, Bern, Switzerland, Current address: Nestlé SA, Nestlé Research, Nestlé Institute of Health Sciences, Department of Gastrointestinal Health Immunology, Vers-Chez-les-Blancs, Lausanne, Switzerland
| | - Hassan Melhem
- Department of Biomedicine, Gastroenterology, University of Basel, Basel, Switzerland
| | - Petr Hruz
- Department of Gastroenterology, Clarunis - University Center for Gastrointestinal and Liver Diseases, Basel, Switzerland
| | - Jan Hendrik Niess
- Department of Biomedicine, Gastroenterology, University of Basel, Basel, Switzerland .,Department of Gastroenterology, Clarunis - University Center for Gastrointestinal and Liver Diseases, Basel, Switzerland.,Department of Clinical Research, University of Basel, Basel, Switzerland
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7
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Bühler A, Gahr BM, Park DD, Bertozzi A, Boos A, Dalvoy M, Pott A, Oswald F, Kovall RA, Kühn B, Weidinger G, Rottbauer W, Just S. Histone deacetylase 1 controls cardiomyocyte proliferation during embryonic heart development and cardiac regeneration in zebrafish. PLoS Genet 2021; 17:e1009890. [PMID: 34723970 PMCID: PMC8584950 DOI: 10.1371/journal.pgen.1009890] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 11/11/2021] [Accepted: 10/18/2021] [Indexed: 12/20/2022] Open
Abstract
In contrast to mammals, the zebrafish maintains its cardiomyocyte proliferation capacity throughout adulthood. However, neither the molecular mechanisms that orchestrate the proliferation of cardiomyocytes during developmental heart growth nor in the context of regeneration in the adult are sufficiently defined yet. We identified in a forward genetic N-ethyl-N-nitrosourea (ENU) mutagenesis screen the recessive, embryonic-lethal zebrafish mutant baldrian (bal), which shows severely impaired developmental heart growth due to diminished cardiomyocyte proliferation. By positional cloning, we identified a missense mutation in the zebrafish histone deacetylase 1 (hdac1) gene leading to severe protein instability and the loss of Hdac1 function in vivo. Hdac1 inhibition significantly reduces cardiomyocyte proliferation, indicating a role of Hdac1 during developmental heart growth in zebrafish. To evaluate whether developmental and regenerative Hdac1-associated mechanisms of cardiomyocyte proliferation are conserved, we analyzed regenerative cardiomyocyte proliferation after Hdac1 inhibition at the wound border zone in cryoinjured adult zebrafish hearts and we found that Hdac1 is also essential to orchestrate regenerative cardiomyocyte proliferation in the adult vertebrate heart. In summary, our findings suggest an important and conserved role of Histone deacetylase 1 (Hdac1) in developmental and adult regenerative cardiomyocyte proliferation in the vertebrate heart. Heart disease is one of the most common causes of death in all developed countries. While zebrafish cardiomyocytes are able to proliferate throughout adulthood, mammalian cardiomyocytes lose this ability during early development, and therefore are not capable to replace and renew cardiomyocytes after injury. The underlying mechanisms of cardiomyocyte proliferation are still not completely resolved. Understanding how zebrafish cardiomyocytes preserve their proliferating state, would be a valuable information to foster cardiac regeneration, e.g. after myocardial infarction in patients. Knowledge of the signaling pathways that need to be activated, or deactivated in order to induce cardiomyocyte proliferation after acute or chronic injury will pave the way for the development of genetic and/or pharmacological treatment options. In an ENU-mutagenesis screen, we identified the zebrafish mutant baldrian, which shows reduced embryonic cardiomyocyte proliferation. As genetic cause of the observed phenotype, we identified a missense mutation in the hdac1 gene. By treatment of heart-injured adult fish with the HDAC1 inhibitor Mocetinostat, we were able to show a reduced rate of cardiomyocyte proliferation also in the adult zebrafish heart in vivo, suggesting a role of Hdac1 in embryonic heart growth and adult regenerative cardiomyocyte proliferation in zebrafish.
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Affiliation(s)
- Anja Bühler
- Molecular Cardiology, Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Bernd M Gahr
- Molecular Cardiology, Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Deung-Dae Park
- Molecular Cardiology, Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Alberto Bertozzi
- Institute of Biochemistry and Molecular Biology, University of Ulm, Ulm, Germany
| | - Alena Boos
- Molecular Cardiology, Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Mohankrishna Dalvoy
- Institute of Biochemistry and Molecular Biology, University of Ulm, Ulm, Germany
| | - Alexander Pott
- Molecular Cardiology, Department of Internal Medicine II, University of Ulm, Ulm, Germany.,Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Franz Oswald
- Department of Internal Medicine I, University of Ulm, Ulm, Germany
| | - Rhett A Kovall
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Bernhard Kühn
- Department of Pediatrics, University of Pittsburgh, and Richard King Mellon Institute for Pediatric Research and Division of Pediatric Cardiology, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania, United States of America
| | - Gilbert Weidinger
- Institute of Biochemistry and Molecular Biology, University of Ulm, Ulm, Germany
| | | | - Steffen Just
- Molecular Cardiology, Department of Internal Medicine II, University of Ulm, Ulm, Germany
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8
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Pan L, Hoffmeister P, Turkiewicz A, Huynh NND, Große-Berkenbusch A, Knippschild U, Gebhardt JCM, Baumann B, Borggrefe T, Oswald F. Transcription Factor RBPJL Is Able to Repress Notch Target Gene Expression but Is Non-Responsive to Notch Activation. Cancers (Basel) 2021; 13:cancers13195027. [PMID: 34638511 PMCID: PMC8508133 DOI: 10.3390/cancers13195027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/28/2021] [Accepted: 09/30/2021] [Indexed: 12/01/2022] Open
Abstract
Simple Summary The transcription factor RBPJ is an integral part of the Notch signaling cascade. RBPJ can function as a coactivator when Notch signaling is activated but acts as a repressor in the absence of a Notch stimulus. Here, we characterized the function of RBPJL, a pancreas-specific paralog of RBPJ. Upon depletion of RBPJ using CRISPR/Cas9, we observed specific upregulation of Notch target gene expression. Reconstitution with RBPJL can compensate for the lack of RBPJ function in the repression of Notch target genes but is not able to mediate the Notch-dependent activation of gene expression. On the molecular level, we identified a limited capacity of RBPJL to interact with activated Notch1–4. Abstract The Notch signaling pathway is an evolutionary conserved signal transduction cascade present in almost all tissues and is required for embryonic and postnatal development, as well as for stem cell maintenance, but it is also implicated in tumorigenesis including pancreatic cancer and leukemia. The transcription factor RBPJ forms a coactivator complex in the presence of a Notch signal, whereas it represses Notch target genes in the absence of a Notch stimulus. In the pancreas, a specific paralog of RBPJ, called RBPJL, is expressed and found as part of the heterotrimeric PTF1-complex. However, the function of RBPJL in Notch signaling remains elusive. Using molecular modeling, biochemical and functional assays, as well as single-molecule time-lapse imaging, we show that RBPJL and RBPJ, despite limited sequence homology, possess a high degree of structural similarity. RBPJL is specifically expressed in the exocrine pancreas, whereas it is mostly undetectable in pancreatic tumour cell lines. Importantly, RBPJL is not able to interact with Notch−1 to −4 and it does not support Notch-mediated transactivation. However, RBPJL can bind to canonical RBPJ DNA elements and shows migration dynamics comparable to that of RBPJ in the nuclei of living cells. Importantly, RBPJL is able to interact with SHARP/SPEN, the central corepressor of the Notch pathway. In line with this, RBPJL is able to fully reconstitute transcriptional repression at Notch target genes in cells lacking RBPJ. Together, RBPJL can act as an antagonist of RBPJ, which renders cells unresponsive to the activation of Notch.
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Affiliation(s)
- Leiling Pan
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center Ulm, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (L.P.); (P.H.)
| | - Philipp Hoffmeister
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center Ulm, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (L.P.); (P.H.)
| | - Aleksandra Turkiewicz
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany;
| | - N. N. Duyen Huynh
- Institute of Biophysics, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany; (N.N.D.H.); (A.G.-B.); (J.C.M.G.)
| | - Andreas Große-Berkenbusch
- Institute of Biophysics, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany; (N.N.D.H.); (A.G.-B.); (J.C.M.G.)
| | - Uwe Knippschild
- Department of General and Visceral Surgery, Surgery Center, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany;
| | - J. Christof M. Gebhardt
- Institute of Biophysics, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany; (N.N.D.H.); (A.G.-B.); (J.C.M.G.)
| | - Bernd Baumann
- Institute of Physiological Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany;
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany;
- Correspondence: (T.B.); (F.O.); Tel.: +49-731-500-44544 (F.O.)
| | - Franz Oswald
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center Ulm, Ulm University, Albert-Einstein-Allee 23, 89081 Ulm, Germany; (L.P.); (P.H.)
- Correspondence: (T.B.); (F.O.); Tel.: +49-731-500-44544 (F.O.)
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9
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Sotomska M, Liefke R, Ferrante F, Schwederski H, Oswald F, Borggrefe T. SUMOylated non-canonical polycomb PRC1.6 complex as a prerequisite for recruitment of transcription factor RBPJ. Epigenetics Chromatin 2021; 14:38. [PMID: 34332624 PMCID: PMC8325870 DOI: 10.1186/s13072-021-00412-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 07/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Notch signaling controls cell fate decisions in many contexts during development and adult stem cell homeostasis and, when dysregulated, leads to carcinogenesis. The central transcription factor RBPJ assembles the Notch coactivator complex in the presence of Notch signaling, and represses Notch target gene expression in its absence. RESULTS We identified L3MBTL2 and additional members of the non-canonical polycomb repressive PRC1.6 complex in DNA-bound RBPJ associated complexes and demonstrate that L3MBTL2 directly interacts with RBPJ. Depletion of RBPJ does not affect occupancy of PRC1.6 components at Notch target genes. Conversely, absence of L3MBTL2 reduces RBPJ occupancy at enhancers of Notch target genes. Since L3MBTL2 and additional members of the PRC1.6 are known to be SUMOylated, we investigated whether RBPJ uses SUMO-moieties as contact points. Indeed, we found that RBPJ binds to SUMO2/3 and that this interaction depends on a defined SUMO-interaction motif. Furthermore, we show that pharmacological inhibition of SUMOylation reduces RBPJ occupancy at Notch target genes. CONCLUSIONS We propose that the PRC1.6 complex and its conjugated SUMO-modifications provide a favorable environment for binding of RBPJ to Notch target genes.
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Affiliation(s)
- Małgorzata Sotomska
- Institute of Biochemistry, Justus-Liebig University of Giessen, Friedrichstrasse 24, 35392, Giessen, Germany
| | - Robert Liefke
- Institute of Molecular Biology and Tumor Research (IMT), Philipps University of Marburg, Hans-Meerwein Strasse 2, 35043, Marburg, Germany.,Department of Hematology, Oncology and Immunology, University Hospital Marburg and Philipps University of Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - Francesca Ferrante
- Institute of Biochemistry, Justus-Liebig University of Giessen, Friedrichstrasse 24, 35392, Giessen, Germany
| | - Heiko Schwederski
- Center for Internal Medicine, Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Franz Oswald
- Center for Internal Medicine, Department of Internal Medicine 1, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Tilman Borggrefe
- Institute of Biochemistry, Justus-Liebig University of Giessen, Friedrichstrasse 24, 35392, Giessen, Germany.
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10
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Ónody A, Veres-Székely A, Pap D, Rokonay R, Szebeni B, Sziksz E, Oswald F, Veres G, Cseh Á, Szabó AJ, Vannay Á. Interleukin-24 regulates mucosal remodeling in inflammatory bowel diseases. J Transl Med 2021; 19:237. [PMID: 34078403 PMCID: PMC8173892 DOI: 10.1186/s12967-021-02890-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 05/17/2021] [Indexed: 12/30/2022] Open
Abstract
Background Recently, increased interleukin (IL)-24 expression has been demonstrated in the colon biopsies of adult patients with inflammatory bowel disease (IBD). However, the role of IL-24 in the pathomechanism of IBD is still largely unknown. Methods Presence of IL-24 was determined in the samples of children with IBD and in the colon of dextran sodium sulfate (DSS) treated mice. Effect of inflammatory factors on IL24 expression was determined in peripheral blood (PBMCs) and lamina propria mononuclear cells (LPMCs). Also, the impact of IL-24 was investigated on HT-29 epithelial cells and CCD-18Co colon fibroblasts. Expression of tissue remodeling related genes was investigated in the colon of wild type (WT) mice locally treated with IL-24 and in the colon of DSS treated WT and Il20rb knock out (KO) mice. Results Increased amount of IL-24 was demonstrated in the serum and colon samples of children with IBD and DSS treated mice compared to that of controls. IL-1β, LPS or H2O2 treatment increased the expression of IL24 in PBMCs and LPMCs. IL-24 treatment resulted in increased amount of TGF-β and PDGF-B in HT-29 cells and enhanced the expression of extracellular matrix (ECM)-related genes and the motility of CCD-18Co cells. Similarly, local IL-24 treatment increased the colonic Tgfb1 and Pdgfb expression of WT mice. Moreover, expression of pro-fibrotic Tgfb1 and Pdgfb were lower in the colon of DSS treated Il20rb KO compared to that of WT mice. The disease activity index of colitis was less severe in DSS treated Il20rb KO compared to WT mice. Conclusion Our study suggest that IL-24 may play a significant role in the mucosal remodeling of patients with IBD by promoting pro-fibrotic processes. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-021-02890-7.
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Affiliation(s)
- Anna Ónody
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Apor Veres-Székely
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.,ELKH-SE Pediatrics and Nephrology Research Group, 53-54 Bókay J. Street, Budapest, H-1083, Hungary
| | - Domonkos Pap
- ELKH-SE Pediatrics and Nephrology Research Group, 53-54 Bókay J. Street, Budapest, H-1083, Hungary
| | - Réka Rokonay
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Beáta Szebeni
- ELKH-SE Pediatrics and Nephrology Research Group, 53-54 Bókay J. Street, Budapest, H-1083, Hungary
| | - Erna Sziksz
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Franz Oswald
- Department of Internal Medicine I, University Medical Center, Ulm, Germany
| | - Gábor Veres
- Pediatric Institute-Clinic, University of Debrecen, Debrecen, Hungary
| | - Áron Cseh
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Attila J Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.,ELKH-SE Pediatrics and Nephrology Research Group, 53-54 Bókay J. Street, Budapest, H-1083, Hungary
| | - Ádám Vannay
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary. .,ELKH-SE Pediatrics and Nephrology Research Group, 53-54 Bókay J. Street, Budapest, H-1083, Hungary.
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11
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Frankenreiter L, Gahr BM, Schmid H, Zimmermann M, Deichsel S, Hoffmeister P, Turkiewicz A, Borggrefe T, Oswald F, Nagel AC. Phospho-Site Mutations in Transcription Factor Suppressor of Hairless Impact Notch Signaling Activity During Hematopoiesis in Drosophila. Front Cell Dev Biol 2021; 9:658820. [PMID: 33937259 PMCID: PMC8079769 DOI: 10.3389/fcell.2021.658820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/25/2021] [Indexed: 11/13/2022] Open
Abstract
The highly conserved Notch signaling pathway controls a multitude of developmental processes including hematopoiesis. Here, we provide evidence for a novel mechanism of tissue-specific Notch regulation involving phosphorylation of CSL transcription factors within the DNA-binding domain. Earlier we found that a phospho-mimetic mutation of the Drosophila CSL ortholog Suppressor of Hairless [Su(H)] at Ser269 impedes DNA-binding. By genome-engineering, we now introduced phospho-specific Su(H) mutants at the endogenous Su(H) locus, encoding either a phospho-deficient [Su(H) S269A ] or a phospho-mimetic [Su(H) S269D ] isoform. Su(H) S269D mutants were defective of Notch activity in all analyzed tissues, consistent with impaired DNA-binding. In contrast, the phospho-deficient Su(H) S269A mutant did not generally augment Notch activity, but rather specifically in several aspects of blood cell development. Unexpectedly, this process was independent of the corepressor Hairless acting otherwise as a general Notch antagonist in Drosophila. This finding is in agreement with a novel mode of Notch regulation by posttranslational modification of Su(H) in the context of hematopoiesis. Importantly, our studies of the mammalian CSL ortholog (RBPJ/CBF1) emphasize a potential conservation of this regulatory mechanism: phospho-mimetic RBPJ S221D was dysfunctional in both the fly as well as two human cell culture models, whereas phospho-deficient RBPJ S221A rather gained activity during fly hematopoiesis. Thus, dynamic phosphorylation of CSL-proteins within the DNA-binding domain provides a novel means to fine-tune Notch signal transduction in a context-dependent manner.
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Affiliation(s)
- Lisa Frankenreiter
- Department of General Genetics (190g), Institute of Biology (190), University of Hohenheim, Stuttgart, Germany
| | - Bernd M Gahr
- Department of General Genetics (190g), Institute of Biology (190), University of Hohenheim, Stuttgart, Germany
| | - Hannes Schmid
- Department of General Genetics (190g), Institute of Biology (190), University of Hohenheim, Stuttgart, Germany
| | - Mirjam Zimmermann
- Department of General Genetics (190g), Institute of Biology (190), University of Hohenheim, Stuttgart, Germany
| | - Sebastian Deichsel
- Department of General Genetics (190g), Institute of Biology (190), University of Hohenheim, Stuttgart, Germany
| | - Philipp Hoffmeister
- Department of Internal Medicine 1, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | | | - Tilman Borggrefe
- Institute of Biochemistry, Justus-Liebig University of Giessen, Giessen, Germany
| | - Franz Oswald
- Department of Internal Medicine 1, Center for Internal Medicine, University Medical Center Ulm, Ulm, Germany
| | - Anja C Nagel
- Department of General Genetics (190g), Institute of Biology (190), University of Hohenheim, Stuttgart, Germany
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12
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Giaimo BD, Robert-Finestra T, Oswald F, Gribnau J, Borggrefe T. Chromatin Regulator SPEN/SHARP in X Inactivation and Disease. Cancers (Basel) 2021; 13:cancers13071665. [PMID: 33916248 PMCID: PMC8036811 DOI: 10.3390/cancers13071665] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Carcinogenesis is a multistep process involving not only the activation of oncogenes and disabling tumor suppressor genes, but also epigenetic modulation of gene expression. X chromosome inactivation (XCI) is a paradigm to study heterochromatin formation and maintenance. The double dosage of X chromosomal genes in female mammals is incompatible with early development. XCI is an excellent model system for understanding the establishment of facultative heterochromatin initiated by the expression of a 17,000 nt long non-coding RNA, known as Xinactivespecifictranscript (Xist), on the X chromosome. This review focuses on the molecular mechanisms of how epigenetic modulators act in a step-wise manner to establish facultative heterochromatin, and we put these in the context of cancer biology and disease. An in depth understanding of XCI will allow a better characterization of particular types of cancer and hopefully facilitate the development of novel epigenetic therapies. Abstract Enzymes, such as histone methyltransferases and demethylases, histone acetyltransferases and deacetylases, and DNA methyltransferases are known as epigenetic modifiers that are often implicated in tumorigenesis and disease. One of the best-studied chromatin-based mechanism is X chromosome inactivation (XCI), a process that establishes facultative heterochromatin on only one X chromosome in females and establishes the right dosage of gene expression. The specificity factor for this process is the long non-coding RNA Xinactivespecifictranscript (Xist), which is upregulated from one X chromosome in female cells. Subsequently, Xist is bound by the corepressor SHARP/SPEN, recruiting and/or activating histone deacetylases (HDACs), leading to the loss of active chromatin marks such as H3K27ac. In addition, polycomb complexes PRC1 and PRC2 establish wide-spread accumulation of H3K27me3 and H2AK119ub1 chromatin marks. The lack of active marks and establishment of repressive marks set the stage for DNA methyltransferases (DNMTs) to stably silence the X chromosome. Here, we will review the recent advances in understanding the molecular mechanisms of how heterochromatin formation is established and put this into the context of carcinogenesis and disease.
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Affiliation(s)
- Benedetto Daniele Giaimo
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
- Correspondence: (B.D.G.); (T.B.); Tel.: +49-641-9947-400 (T.B.)
| | - Teresa Robert-Finestra
- Department of Developmental Biology, Erasmus MC, Oncode Institute, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands; (T.R.-F.); (J.G.)
| | - Franz Oswald
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany;
| | - Joost Gribnau
- Department of Developmental Biology, Erasmus MC, Oncode Institute, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands; (T.R.-F.); (J.G.)
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
- Correspondence: (B.D.G.); (T.B.); Tel.: +49-641-9947-400 (T.B.)
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13
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Ferrante F, Giaimo BD, Bartkuhn M, Zimmermann T, Close V, Mertens D, Nist A, Stiewe T, Meier-Soelch J, Kracht M, Just S, Klöble P, Oswald F, Borggrefe T. HDAC3 functions as a positive regulator in Notch signal transduction. Nucleic Acids Res 2020; 48:3496-3512. [PMID: 32107550 PMCID: PMC7144913 DOI: 10.1093/nar/gkaa088] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 01/29/2020] [Accepted: 02/03/2020] [Indexed: 12/26/2022] Open
Abstract
Aberrant Notch signaling plays a pivotal role in T-cell acute lymphoblastic leukemia (T-ALL) and chronic lymphocytic leukemia (CLL). Amplitude and duration of the Notch response is controlled by ubiquitin-dependent proteasomal degradation of the Notch1 intracellular domain (NICD1), a hallmark of the leukemogenic process. Here, we show that HDAC3 controls NICD1 acetylation levels directly affecting NICD1 protein stability. Either genetic loss-of-function of HDAC3 or nanomolar concentrations of HDAC inhibitor apicidin lead to downregulation of Notch target genes accompanied by a local reduction of histone acetylation. Importantly, an HDAC3-insensitive NICD1 mutant is more stable but biologically less active. Collectively, these data show a new HDAC3- and acetylation-dependent mechanism that may be exploited to treat Notch1-dependent leukemias.
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Affiliation(s)
- Francesca Ferrante
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | | | - Marek Bartkuhn
- Institute for Genetics, University of Giessen, Heinrich-Buff-Ring 58-62, 35392 Giessen, Germany
| | - Tobias Zimmermann
- Bioinformatics and Systems Biology, University of Giessen, Heinrich-Buff-Ring 58-62, 35392 Giessen, Germany
| | - Viola Close
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, Albert-Einstein-Allee 23, 89081 Ulm, Germany.,Cooperation Unit "Mechanisms of Leukemogenesis'' (B061), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg Germany
| | - Daniel Mertens
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, Albert-Einstein-Allee 23, 89081 Ulm, Germany.,Cooperation Unit "Mechanisms of Leukemogenesis'' (B061), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg Germany
| | - Andrea Nist
- Genomics Core Facility, Institute of Molecular Oncology, Philipps-University, Hans-Meerwein-Str. 3, 35043 Marburg, Germany
| | - Thorsten Stiewe
- Genomics Core Facility, Institute of Molecular Oncology, Philipps-University, Hans-Meerwein-Str. 3, 35043 Marburg, Germany
| | - Johanna Meier-Soelch
- Rudolf Buchheim Institute of Pharmacology, University of Giessen, Schubertstrasse 81, 35392 Giessen, Germany
| | - Michael Kracht
- Rudolf Buchheim Institute of Pharmacology, University of Giessen, Schubertstrasse 81, 35392 Giessen, Germany
| | - Steffen Just
- University Medical Center Ulm, Center for Internal Medicine, Molecular Cardiology, Department of Internal Medicine II, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Patricia Klöble
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Franz Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
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14
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Pap D, Veres-Székely A, Szebeni B, Rokonay R, Ónody A, Lippai R, Takács IM, Tislér A, Kardos M, Oswald F, Fekete A, Szabó AJ, Vannay Á. Characterization of IL-19, -20, and -24 in acute and chronic kidney diseases reveals a pro-fibrotic role of IL-24. J Transl Med 2020; 18:172. [PMID: 32306980 PMCID: PMC7168946 DOI: 10.1186/s12967-020-02338-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 04/09/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Recently, the role of IL-19, IL-20 and IL-24 has been reported in renal disorders. However, still little is known about their biological role. METHODS Localization of IL-20RB was determined in human biopsies and in the kidneys of mice that underwent unilateral ureteral obstruction (UUO). Renal Il19, Il20 and Il24 expression was determined in ischemia/reperfusion, lipopolysaccharide, streptozotocin, or UUO induced animal models of kidney diseases. The effects of H2O2, LPS, TGF-β1, PDGF-B and IL-1β on IL19, IL20 and IL24 expression was determined in peripheral blood mononuclear cells (PBMCs). The extents of extracellular matrix (ECM) and α-SMA, Tgfb1, Pdgfb, and Ctgf expression were determined in the kidneys of Il20rb knockout (KO) and wild type (WT) mice following UUO. The effect of IL-24 was also examined on HK-2 tubular epithelial cells and NRK49F renal fibroblasts. RESULTS IL-20RB was present in the renal biopsies of patients with lupus nephritis, IgA and diabetic nephropathy. Amount of IL-20RB increased in the kidneys of mice underwent UUO. The expression of Il19, Il20 and Il24 increased in the animal models of various kidney diseases. IL-1β, H2O2 and LPS induced the IL19, IL20 and IL24 expression of PBMCs. The extent of ECM, α-SMA, fibronectin, Tgfb1, Pdgfb, and Ctgf expression was lower in the kidney of Il20rb KO compared to WT mice following UUO. IL-24 treatment induced the apoptosis and TGF-β1, PDGF-B, CTGF expression of HK-2 cells. CONCLUSIONS Our data confirmed the significance of IL-19, IL-20 and IL-24 in the pathomechanism of renal diseases. Furthermore, we were the first to demonstrate the pro-fibrotic effect of IL-24.
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Affiliation(s)
- Domonkos Pap
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary. .,1st Department of Paediatrics, Semmelweis University, Budapest, Hungary.
| | | | - Beáta Szebeni
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary.,1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Réka Rokonay
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Anna Ónody
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Rita Lippai
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | | | - András Tislér
- 1st Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Magdolna Kardos
- 2nd Department of Pathology, Semmelweis University, Budapest, Hungary
| | - Franz Oswald
- University Medical Center, Center of Internal Medicine, Department of Internal Medicine I, Ulm, Germany
| | - Andrea Fekete
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary.,MTA-SE, Lendület Diabetes Research Group, Budapest, Hungary
| | - Attila J Szabó
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary.,1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Ádám Vannay
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary.,1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
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15
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Yuan Z, VanderWielen BD, Giaimo BD, Pan L, Collins CE, Turkiewicz A, Hein K, Oswald F, Borggrefe T, Kovall RA. Structural and Functional Studies of the RBPJ-SHARP Complex Reveal a Conserved Corepressor Binding Site. Cell Rep 2020; 26:845-854.e6. [PMID: 30673607 PMCID: PMC6352735 DOI: 10.1016/j.celrep.2018.12.097] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 11/05/2018] [Accepted: 12/21/2018] [Indexed: 11/28/2022] Open
Abstract
Notch is a conserved signaling pathway that is essential for metazoan development and homeostasis; dysregulated signaling underlies the pathophysiology of numerous human diseases. Receptor-ligand interactions result in gene expression changes, which are regulated by the transcription factor RBPJ. RBPJ forms a complex with the intracellular domain of the Notch receptor and the coactivator Mastermind to activate transcription, but it can also function as a repressor by interacting with corepressor proteins. Here, we determine the structure of RBPJ bound to the corepressor SHARP and DNA, revealing its mode of binding to RBPJ. We tested structure-based mutants in biophysical and biochemical-cellular as-says to characterize the role of RBPJ as a repressor, clearly demonstrating that RBPJ mutants deficient for SHARP binding are incapable of repressing transcription of genes responsive to Notch signaling in cells. Altogether, our structure-function studies provide significant insights into the repressor function of RBPJ. Yuan et al. determine the X-ray structure of the corepressor SHARP bound to RBPJ, the nuclear effector of the Notch pathway. The structure-function analysis provides insights into corepressor binding to RBPJ and how RBPJ functions as a repressor of transcription of Notch target genes.
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Affiliation(s)
- Zhenyu Yuan
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Bradley D VanderWielen
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | | | - Leiling Pan
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, 89081 Ulm, Germany
| | - Courtney E Collins
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | | | - Kerstin Hein
- Institute of Biochemistry, University of Giessen, Giessen, Germany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, 89081 Ulm, Germany
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Giessen, Germany
| | - Rhett A Kovall
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
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16
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Hoock SC, Ritter A, Steinhäuser K, Roth S, Behrends C, Oswald F, Solbach C, Louwen F, Kreis N, Yuan J. RITA modulates cell migration and invasion by affecting focal adhesion dynamics. Mol Oncol 2019; 13:2121-2141. [PMID: 31353815 PMCID: PMC6763788 DOI: 10.1002/1878-0261.12551] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 07/12/2019] [Accepted: 07/21/2019] [Indexed: 12/15/2022] Open
Abstract
RITA, the RBP-J interacting and tubulin-associated protein, has been reported to be related to tumor development, but the underlying mechanisms are not understood. Since RITA interacts with tubulin and coats microtubules of the cytoskeleton, we hypothesized that it is involved in cell motility. We show here that depletion of RITA reduces cell migration and invasion of diverse cancer cell lines and mouse embryonic fibroblasts. Cells depleted of RITA display stable focal adhesions (FA) with elevated active integrin, phosphorylated focal adhesion kinase, and paxillin. This is accompanied by enlarged size and disturbed turnover of FA. These cells also demonstrate increased polymerized tubulin. Interestingly, RITA is precipitated with the lipoma-preferred partner (LPP), which is critical in actin cytoskeleton remodeling and cell migration. Suppression of RITA results in reduced LPP and α-actinin at FA leading to compromised focal adhesion turnover and actin dynamics. This study identifies RITA as a novel crucial player in cell migration and invasion by affecting the turnover of FA through its interference with the dynamics of actin filaments and microtubules. Its deregulation may contribute to malignant progression.
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Affiliation(s)
- Samira Catharina Hoock
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
| | - Andreas Ritter
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
| | - Kerstin Steinhäuser
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
- Present address:
Solvadis Distribution GmbHGernsheimGermany
| | - Susanne Roth
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
| | - Christian Behrends
- Institute of Biochemistry II, Medical SchoolJ. W.‐Goethe UniversityFrankfurtGermany
- Present address:
Munich Cluster of Systems NeurologyLudwig‐Maximilians‐Universität MünchenMunichGermany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal MedicineMedical Center UlmGermany
| | - Christine Solbach
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
| | - Frank Louwen
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
| | - Nina‐Naomi Kreis
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
| | - Juping Yuan
- Department of Gynecology and Obstetrics, School of MedicineJ. W. Goethe‐UniversityFrankfurtGermany
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17
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Agrawal M, Schwarz P, Giaimo BD, Bedzhov I, Corbacioglu A, Weber D, Gaidzik VI, Jahn N, Rücker FG, Schroeder T, Kindler T, Wattad M, Götze K, Lübbert M, Salwender H, Ringhoffer M, Lange E, Koller E, Thol F, Heuser M, Ganser A, Bullinger L, Paschka P, Döhner H, Geiger H, Borggrefe T, Döhner K, Oswald F. Functional and clinical characterization of the alternatively spliced isoform AML1-ETO9a in adult patients with translocation t(8;21)(q22;q22.1) acute myeloid leukemia (AML). Leukemia 2019; 34:630-634. [PMID: 31462736 PMCID: PMC7214266 DOI: 10.1038/s41375-019-0551-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 05/29/2019] [Accepted: 06/06/2019] [Indexed: 12/04/2022]
Affiliation(s)
- Mridul Agrawal
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Peggy Schwarz
- Klinik für Innere Medizin I, Universitätsklinikum Ulm, Ulm, Germany
| | | | - Ivan Bedzhov
- Embryonic Self-Organization research group, Max Planck Institute for Molecular Biomedicine, Röntgenstraße 20, 48149, Münster, Germany
| | | | - Daniela Weber
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Verena I Gaidzik
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Nikolaus Jahn
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Frank G Rücker
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Thomas Schroeder
- Klinik für Hämatologie, Onkologie und Klinische Immunologie, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
| | - Thomas Kindler
- III. Medizinische Klinik und Poliklinik, Universitätsmedizin Mainz, Mainz, Germany
| | - Mohammed Wattad
- Klinik für Hämatologie, Internistische Onkologie und Stammzellentransplantation, Evangelisches Krankenhaus Essen-Werden, Essen, Germany
| | - Katharina Götze
- III. Medizinische Klinik, Klinikum rechts der Isar der Technischen Universität München, München, Germany
| | - Michael Lübbert
- Klinik für Innere Medizin I, Universitätsklinikum Freiburg, Freiburg, Germany
| | - Hans Salwender
- II. Medizinische Abteilung, Asklepios Klinik Altona, Hamburg, Germany
| | - Mark Ringhoffer
- Medizinische Klinik III, Städtisches Klinikum Karlsruhe, Karlsruhe, Germany
| | - Elisabeth Lange
- Klinik für Hämatologie, Onkologie und Palliativmedizin, Evangelisches Krankenhaus Hamm, Hamm, Germany
| | - Elisabeth Koller
- Medizinische Abteilung, Hanusch-Krankenhaus der WGKK, Wien, Austria
| | - Felicitas Thol
- Klinik für Hämatologie, Hämostaseologie, Onkologie und Stammzelltransplantation, Medizinische Hochschule Hannover, Hannover, Germany
| | - Michael Heuser
- Klinik für Hämatologie, Hämostaseologie, Onkologie und Stammzelltransplantation, Medizinische Hochschule Hannover, Hannover, Germany
| | - Arnold Ganser
- Klinik für Hämatologie, Hämostaseologie, Onkologie und Stammzelltransplantation, Medizinische Hochschule Hannover, Hannover, Germany
| | - Lars Bullinger
- Medizinische Klinik m. S. Hämatologie, Onkologie und Tumorimmunologie, Campus Virchow-Klinikum, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Peter Paschka
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Hartmut Döhner
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany
| | - Hartmut Geiger
- Institut für Molekulare Medizin, Universität Ulm, Ulm, Germany.,Division of Experimental Hematology and Cancer Biology, CCHMC, Cincinnati, OH, USA
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Giessen, Germany
| | - Konstanze Döhner
- Klinik für Innere Medizin III, Universitätsklinikum Ulm, Ulm, Germany.
| | - Franz Oswald
- Klinik für Innere Medizin I, Universitätsklinikum Ulm, Ulm, Germany
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18
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Giaimo BD, Ferrante F, Vallejo DM, Hein K, Gutierrez-Perez I, Nist A, Stiewe T, Mittler G, Herold S, Zimmermann T, Bartkuhn M, Schwarz P, Oswald F, Dominguez M, Borggrefe T. Histone variant H2A.Z deposition and acetylation directs the canonical Notch signaling response. Nucleic Acids Res 2019; 46:8197-8215. [PMID: 29986055 PMCID: PMC6144792 DOI: 10.1093/nar/gky551] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 06/28/2018] [Indexed: 02/04/2023] Open
Abstract
A fundamental as yet incompletely understood feature of Notch signal transduction is a transcriptional shift from repression to activation that depends on chromatin regulation mediated by transcription factor RBP-J and associated cofactors. Incorporation of histone variants alter the functional properties of chromatin and are implicated in the regulation of gene expression. Here, we show that depletion of histone variant H2A.Z leads to upregulation of canonical Notch target genes and that the H2A.Z-chaperone TRRAP/p400/Tip60 complex physically associates with RBP-J at Notch-dependent enhancers. When targeted to RBP-J-bound enhancers, the acetyltransferase Tip60 acetylates H2A.Z and upregulates Notch target gene expression. Importantly, the Drosophila homologs of Tip60, p400 and H2A.Z modulate Notch signaling response and growth in vivo. Together, our data reveal that loading and acetylation of H2A.Z are required to assure tight control of canonical Notch activation.
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Affiliation(s)
- Benedetto Daniele Giaimo
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany.,Spemann Graduate School of Biology and Medicine (SGBM), Albertstrasse 19A, 79104 Freiburg, Germany
| | - Francesca Ferrante
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Diana M Vallejo
- Instituto de Neurociencias, Consejo Superior de Investigaciones Cientificas and Universidad Miguel Hernández, Campus de Sant Joan, Apartado 18, 03550 Sant Joan, Alicante, Spain
| | - Kerstin Hein
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Irene Gutierrez-Perez
- Instituto de Neurociencias, Consejo Superior de Investigaciones Cientificas and Universidad Miguel Hernández, Campus de Sant Joan, Apartado 18, 03550 Sant Joan, Alicante, Spain
| | - Andrea Nist
- Genomics Core Facility, Institute of Molecular Oncology, Philipps-University, Hans-Meerwein-Str. 3, 35043 Marburg, Germany
| | - Thorsten Stiewe
- Genomics Core Facility, Institute of Molecular Oncology, Philipps-University, Hans-Meerwein-Str. 3, 35043 Marburg, Germany
| | - Gerhard Mittler
- Max-Planck-Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Susanne Herold
- Department of Internal Medicine II, Universities Giessen & Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Tobias Zimmermann
- Bioinformatics and Systems Biology, University of Giessen, Heinrich-Buff-Ring 58-62, 35392 Giessen, Germany
| | - Marek Bartkuhn
- Institute for Genetics, University of Giessen, Heinrich-Buff-Ring 58-62, 35392 Giessen, Germany
| | - Peggy Schwarz
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Franz Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Maria Dominguez
- Instituto de Neurociencias, Consejo Superior de Investigaciones Cientificas and Universidad Miguel Hernández, Campus de Sant Joan, Apartado 18, 03550 Sant Joan, Alicante, Spain
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
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19
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Wolf D, Smylla TK, Reichmuth J, Hoffmeister P, Kober L, Zimmermann M, Turkiewicz A, Borggrefe T, Nagel AC, Oswald F, Preiss A, Maier D. Nucleo-cytoplasmic shuttling of Drosophila Hairless/Su(H) heterodimer as a means of regulating Notch dependent transcription. Biochim Biophys Acta Mol Cell Res 2019; 1866:1520-1532. [PMID: 31326540 DOI: 10.1016/j.bbamcr.2019.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/02/2019] [Accepted: 07/16/2019] [Indexed: 12/21/2022]
Abstract
Activation and repression of Notch target genes is mediated by transcription factor CSL, known as Suppressor of Hairless (Su(H)) in Drosophila and CBF1 or RBPJ in human. CSL associates either with co-activator Notch or with co-repressors such as Drosophila Hairless. The nuclear translocation of transcription factor CSL relies on co-factor association, both in mammals and in Drosophila. The Drosophila CSL orthologue Su(H) requires Hairless for repressor complex formation. Based on its role in transcriptional silencing, H protein would be expected to be strictly nuclear. However, H protein is also cytosolic, which may relate to its role in the stabilization and nuclear translocation of Su(H) protein. Here, we investigate the function of the predicted nuclear localization signals (NLS 1-3) and single nuclear export signal (NES) of co-repressor Hairless using GFP-fusion proteins, reporter assays and in vivo analyses using Hairless wild type and shuttling-defective Hairless mutants. We identify NLS3 and NES to be critical for Hairless function. In fact, H⁎NLS3 mutant flies match H null mutants, whereas H⁎NLS3⁎NES double mutants display weaker phenotypes in agreement with a crucial role for NES in H export. As expected for a transcriptional repressor, Notch target genes are deregulated in H⁎NLS3 mutant cells, demonstrating nuclear requirement for its activity. Importantly, we reveal that Su(H) protein strictly follows Hairless protein localization. Together, we propose that shuttling between the nucleo-cytoplasmic compartments provides the possibility to fine tune the regulation of Notch target gene expression by balancing of Su(H) protein availability for Notch activation.
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Affiliation(s)
- Dorina Wolf
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Thomas K Smylla
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Jan Reichmuth
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Philipp Hoffmeister
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Ludmilla Kober
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Mirjam Zimmermann
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Aleksandra Turkiewicz
- Justus-Liebig University of Giessen Institute of Biochemistry, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Tilman Borggrefe
- Justus-Liebig University of Giessen Institute of Biochemistry, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Anja C Nagel
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Franz Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Anette Preiss
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany
| | - Dieter Maier
- University of Hohenheim, Institute of Genetics (240a), Garbenstr. 30, 70599 Stuttgart, Germany.
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20
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Kindermann B, Valkova C, Krämer A, Perner B, Engelmann C, Behrendt L, Kritsch D, Jungnickel B, Kehlenbach RH, Oswald F, Englert C, Kaether C. The nuclear pore proteins Nup88/214 and T-cell acute lymphatic leukemia-associated NUP214 fusion proteins regulate Notch signaling. J Biol Chem 2019; 294:11741-11750. [PMID: 31186352 DOI: 10.1074/jbc.ra118.006357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 05/20/2019] [Indexed: 01/14/2023] Open
Abstract
The Notch receptor is a key mediator of developmental programs and cell-fate decisions. Imbalanced Notch signaling leads to developmental disorders and cancer. To fully characterize the Notch signaling pathway and exploit it in novel therapeutic interventions, a comprehensive view on the regulation and requirements of Notch signaling is needed. Notch is regulated at different levels, ranging from ligand binding, stability to endocytosis. Using an array of different techniques, including reporter gene assays, immunocytochemistry, and ChIP-qPCR we show here, to the best of our knowledge for the first time, regulation of Notch signaling at the level of the nuclear pore. We found that the nuclear pore protein Nup214 (nucleoporin 214) and its interaction partner Nup88 negatively regulate Notch signaling in vitro and in vivo in zebrafish. In mammalian cells, loss of Nup88/214 inhibited nuclear export of recombination signal-binding protein for immunoglobulin κJ region (RBP-J), the DNA-binding component of the Notch pathway. This inhibition increased binding of RBP-J to its cognate promoter regions, resulting in increased downstream Notch signaling. Interestingly, we also found that NUP214 fusion proteins, causative for certain cases of T-cell acute lymphatic leukemia, potentially contribute to tumorigenesis via a Notch-dependent mechanism. In summary, the nuclear pore components Nup88/214 suppress Notch signaling in vitro, and in zebrafish, nuclear RBP-J levels are rate-limiting factors for Notch signaling in mammalian cells, and regulation of nucleocytoplasmic transport of RBP-J may contribute to fine-tuning Notch activity in cells.
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Affiliation(s)
- Bastian Kindermann
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
| | - Christina Valkova
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
| | - Andreas Krämer
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
| | - Birgit Perner
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
| | - Christian Engelmann
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
| | - Laura Behrendt
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
| | - Daniel Kritsch
- Institut für Biochemie und Biophysik, Friedrich Schiller Universität Jena, 07745 Jena, Germany
| | - Berit Jungnickel
- Institut für Biochemie und Biophysik, Friedrich Schiller Universität Jena, 07745 Jena, Germany
| | - Ralph H Kehlenbach
- Department of Molecular Biology, Universitätsmedizin Göttingen, 37073 Göttingen, Germany
| | - Franz Oswald
- Universitätsklinikum Ulm, Zentrum für Innere Medizin, Abteilung für Innere Medizin I, 89081 Ulm, Germany
| | - Christoph Englert
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany.,Institut für Biochemie und Biophysik, Friedrich Schiller Universität Jena, 07745 Jena, Germany
| | - Christoph Kaether
- Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07745 Jena, Germany
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21
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Oswald F, Mahmood A, Wahl H. AGING IN PLACE IN URBAN SETTINGS: HOW TO BETTER UNDERSTAND CURRENT AND FUTURE LINKS BETWEEN PERSON AND ENVIRONMENT. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- F Oswald
- Goethe University Frankfurt, Frankfurt, Hessen
| | - A Mahmood
- Simon Fraser University, Vancouver, British Columbia
| | - H Wahl
- Heidelberg University, Heidelberg, Germany, Heidelberg, Baden-Wurttemberg
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22
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Schmidt SM, Slaug B, Oswald F. PERCEIVED AND OBJECTIVE ASPECTS OF HOME AND HEALTH: AGING IN PLACE IN JAPAN AND SWEDEN. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - B Slaug
- Lunds Universitet, Lund, Skane Lan
| | - F Oswald
- Goethe University Frankfurt, Frankfurt, Hessen
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23
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Oswald F, Jopp DS, Kasper R, Wolf F. RESOURCES IN OLD AND VERY OLD AGE: INTERACTIVE EFFECTS OF STATUS, LOSS AND GAIN ON WELL-BEING. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- F Oswald
- Goethe University Frankfurt, Frankfurt, Hessen, Germany
| | - D S Jopp
- University of Lausanne, Switzerland; Swiss Centre of Competence in Research LIVES. Overcoming Vulnerability: Life Course Perspectives
| | - R Kasper
- University of Cologne, Institute of Sociology and Social Psychology, Cologne, Germany
| | - F Wolf
- Goethe University Frankfurt, Interdisciplinary Ageing Research (IAW), Frankfurt a.M., Germany
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24
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Affiliation(s)
- A. Infantes
- Karlsruhe Institut of Technology; BLT Technische Biologie; Fritz-Haber-Weg 4 76131 Karlsruhe Germany
| | - M. Zwick
- Karlsruhe Institut of Technology; BLT Technische Biologie; Fritz-Haber-Weg 4 76131 Karlsruhe Germany
| | - I. K. Stoll
- Karlsruhe Institut of Technology; IKFT; Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - N. Boukis
- Karlsruhe Institut of Technology; IKFT; Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - F. Oswald
- Goethe-Universität Frankfurt am Main; Institut für Molekulare Biowissenschaften; Max-von-Laue-Straße 9 60438 Frankfurt am Main Germany
| | - A. Neumann
- Karlsruhe Institut of Technology; BLT Technische Biologie; Fritz-Haber-Weg 4 76131 Karlsruhe Germany
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25
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Dorneburg C, Goß AV, Fischer M, Roels F, Barth TFE, Berthold F, Kappler R, Oswald F, Siveke JT, Molenaar JJ, Debatin KM, Beltinger C. γ-Secretase inhibitor I inhibits neuroblastoma cells, with NOTCH and the proteasome among its targets. Oncotarget 2018; 7:62799-62813. [PMID: 27588497 PMCID: PMC5325329 DOI: 10.18632/oncotarget.11715] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 08/12/2016] [Indexed: 12/17/2022] Open
Abstract
As high-risk neuroblastoma (NB) has a poor prognosis, new therapeutic modalities are needed. We therefore investigated the susceptibility of NB cells to γ-secretase inhibitor I (GSI-I). NOTCH signaling activity, the cellular effects of GSI-I and its mechanisms of cytotoxicity were evaluated in NB cells in vitro and in vivo. The results show that NOTCH signaling is relevant for human NB cells. Of the GSIs screened in vitro GSI-I was the most effective inhibitor of NB cells. Both MYCN-amplified and non-amplified NB cells were susceptible to GSI-I. Among the targets of GSI-I in NB cells were NOTCH and the proteasome. GSI-I caused G2/M arrest that was enhanced by acute activation of MYCN and led to mitotic dysfunction. GSI-I also induced proapoptotic NOXA. Survival of mice bearing an MYCN non-amplified orthotopic patient-derived NB xenograft was significantly prolonged by systemic GSI-I, associated with mitotic catastrophe and reduced angiogenesis, and without evidence of intestinal toxicity. In conclusion, the activity of GSI-I on multiple targets in NB cells and the lack of gastrointestinal toxicity in mice are advantageous and merit further investigations of GSI-I in NB.
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Affiliation(s)
- Carmen Dorneburg
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Annika V Goß
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Matthias Fischer
- Children's Hospital, Department of Pediatric Oncology and Hematology, University of Cologne, Cologne, Germany
| | - Frederik Roels
- Children's Hospital, Department of Pediatric Oncology and Hematology, University of Cologne, Cologne, Germany
| | - Thomas F E Barth
- Department of Pathology, University Medical Center Ulm, Ulm, Germany
| | - Frank Berthold
- Children's Hospital, Department of Pediatric Oncology and Hematology, University of Cologne, Cologne, Germany
| | - Roland Kappler
- Department of Pediatric Surgery, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Franz Oswald
- Department of Internal Medicine I, University Medical Center Ulm, Ulm, Germany
| | - Jens T Siveke
- Department of Internal Medicine, University Hospital Essen, Essen, Germany
| | - Jan J Molenaar
- Department of Oncogenomics, Academic Medical Center, Amsterdam, The Netherlands
| | - Klaus-Michael Debatin
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
| | - Christian Beltinger
- Department of Pediatrics and Adolescent Medicine, University Medical Center Ulm, Ulm, Germany
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26
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Thiel VN, Giaimo BD, Schwarz P, Soller K, Vas V, Bartkuhn M, Blätte TJ, Döhner K, Bullinger L, Borggrefe T, Geiger H, Oswald F. Heterodimerization of AML1/ETO with CBFβ is required for leukemogenesis but not for myeloproliferation. Leukemia 2017; 31:2491-2502. [PMID: 28360416 PMCID: PMC5668496 DOI: 10.1038/leu.2017.105] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 02/18/2017] [Accepted: 03/13/2017] [Indexed: 02/07/2023]
Abstract
The AML1/Runx1 transcription factor and its heterodimerization partner CBFβ are essential regulators of myeloid differentiation. The chromosomal translocation t(8;21), fusing the DNA binding domain of AML1 to the corepressor eight-twenty-one (ETO), is frequently associated with acute myeloid leukemia and generates the AML1/ETO (AE) fusion protein. AE represses target genes usually activated by AML1 and also affects the endogenous repressive function of ETO at Notch target genes. In order to analyze the contribution of CBFβ in AE-mediated leukemogenesis and deregulation of Notch target genes, we introduced two point mutations in a leukemia-initiating version of AE in mice, called AE9a, that disrupt the AML1/CBFβ interaction (AE9aNT). We report that the AE9a/CBFβ interaction is not required for the AE9a-mediated aberrant expression of AML1 target genes, while upregulation/derepression of Notch target genes does require the interaction with CBFβ. Using retroviral transduction to express AE9a in murine adult bone marrow-derived hematopoietic progenitors, we observed that both AE9a and AE9aNT lead to increased myeloproliferation in vivo. However, both development of leukemia and long-term replating capacity are only observed with AE9a but not with AE9aNT. Thus, deregulation of both AML1 and Notch target genes is required for the development of AE9a-driven leukemia.
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Affiliation(s)
- V N Thiel
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, University of Ulm, Ulm, Germany
| | - B D Giaimo
- Institute of Biochemistry, University of Giessen, Giessen, Germany
| | - P Schwarz
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, University of Ulm, Ulm, Germany
| | - K Soller
- Institute of Molecular Medicine, University of Ulm, Ulm, Germany
| | - V Vas
- Institute of Molecular Medicine, University of Ulm, Ulm, Germany
| | - M Bartkuhn
- Institute for Genetics, University of Giessen, Giessen, Germany
| | - T J Blätte
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, University of Ulm, Ulm, Germany
| | - K Döhner
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, University of Ulm, Ulm, Germany
| | - L Bullinger
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine III, University of Ulm, Ulm, Germany
| | - T Borggrefe
- Institute of Biochemistry, University of Giessen, Giessen, Germany
| | - H Geiger
- Institute of Molecular Medicine, University of Ulm, Ulm, Germany
- Division of Experimental Hematology and Cancer Biology, CCHMC, Cincinnati, OH, USA
| | - F Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, University of Ulm, Ulm, Germany
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27
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Berger AW, Raedler K, Langner C, Ludwig L, Dikopoulos N, Becker KF, Slotta-Huspenina J, Quante M, Schwerdel D, Perkhofer L, Kleger A, Zizer E, Oswald F, Seufferlein T, Meining A. Genetic Biopsy for Prediction of Surveillance Intervals after Endoscopic Resection of Colonic Polyps: Results of the GENESIS Study. United European Gastroenterol J 2017; 6:290-299. [PMID: 29511559 DOI: 10.1177/2050640617723810] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/03/2017] [Indexed: 12/30/2022] Open
Abstract
Background and objective Current surveillance strategies for colorectal cancer following polypectomy are determined by endoscopic and histopathological factors. Such a distinction has been challenged. The present study was designed to identify molecular parameters in colonic polyps potentially defining new sub-groups at risk. Methods One hundred patients were enrolled in this multicentre study. Polyps biopsies underwent formalin-free processing (PAXgene, PreAnalytiX) and targeted next generation sequencing (38 genes (QIAGEN), NextSeq 500 platform (Illumina)). Genetic and histopathological analyses were done blinded to other data. Results In 100 patients, 224 polyps were removed. Significant associations of genetic alterations with endoscopic or histological polyp characteristics were observed for BRAF, KRAS, TCF7L2, FBXW7 and CTNNB1 mutations. Multivariate analysis revealed that polyps ≥ 10 mm have a significant higher relative risk for harbouring oncogene mutations (relative risk 3.467 (1.742-6.933)). Adenomas and right-sided polyps are independent risk factors for CTNNB1 mutations (relative risk 18.559 (2.371-145.245) and 12.987 (1.637-100.00)). Conclusions Assessment of the mutational landscape of polyps can be integrated in the workflow of current colonoscopy practice. There are distinct genetic patterns related to polyp size and location. These results suffice to optimise individual risk calculation and may help to better define surveillance intervals.
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Affiliation(s)
| | - Katja Raedler
- Clinic for Internal Medicine I, Ulm University, Ulm, Germany
| | - Cord Langner
- Institute for Pathology, Medical University Graz, Graz, Austria
| | - Leopold Ludwig
- Outpatient Clinic for Gastroenterology, Dornstadt, Germany
| | | | - Karl F Becker
- Institute for General Pathology and Pathological Anatomy, Technical University Munich, Munich, Germany
| | - Julia Slotta-Huspenina
- Institute for General Pathology and Pathological Anatomy, Technical University Munich, Munich, Germany
| | - Michael Quante
- Department of Internal Medicine, Technical University Munich, Munich, Germany
| | | | - Lukas Perkhofer
- Clinic for Internal Medicine I, Ulm University, Ulm, Germany
| | | | - Eugen Zizer
- Clinic for Internal Medicine I, Ulm University, Ulm, Germany
| | - Franz Oswald
- Clinic for Internal Medicine I, Ulm University, Ulm, Germany
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28
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Oswald F, Klöble P, Ruland A, Rosenkranz D, Hinz B, Butter F, Ramljak S, Zechner U, Herlyn H. The FOXP2-Driven Network in Developmental Disorders and Neurodegeneration. Front Cell Neurosci 2017; 11:212. [PMID: 28798667 PMCID: PMC5526973 DOI: 10.3389/fncel.2017.00212] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 07/04/2017] [Indexed: 12/24/2022] Open
Abstract
The transcription repressor FOXP2 is a crucial player in nervous system evolution and development of humans and songbirds. In order to provide an additional insight into its functional role we compared target gene expression levels between human neuroblastoma cells (SH-SY5Y) stably overexpressing FOXP2 cDNA of either humans or the common chimpanzee, Rhesus monkey, and marmoset, respectively. RNA-seq led to identification of 27 genes with differential regulation under the control of human FOXP2, which were previously reported to have FOXP2-driven and/or songbird song-related expression regulation. RT-qPCR and Western blotting indicated differential regulation of additional 13 new target genes in response to overexpression of human FOXP2. These genes may be directly regulated by FOXP2 considering numerous matches of established FOXP2-binding motifs as well as publicly available FOXP2-ChIP-seq reads within their putative promoters. Ontology analysis of the new and reproduced targets, along with their interactors in a network, revealed an enrichment of terms relating to cellular signaling and communication, metabolism and catabolism, cellular migration and differentiation, and expression regulation. Notably, terms including the words "neuron" or "axonogenesis" were also enriched. Complementary literature screening uncovered many connections to human developmental (autism spectrum disease, schizophrenia, Down syndrome, agenesis of corpus callosum, trismus-pseudocamptodactyly, ankyloglossia, facial dysmorphology) and neurodegenerative diseases and disorders (Alzheimer's, Parkinson's, and Huntington's diseases, Lewy body dementia, amyotrophic lateral sclerosis). Links to deafness and dyslexia were detected, too. Such relations existed for single proteins (e.g., DCDC2, NURR1, PHOX2B, MYH8, and MYH13) and groups of proteins which conjointly function in mRNA processing, ribosomal recruitment, cell-cell adhesion (e.g., CDH4), cytoskeleton organization, neuro-inflammation, and processing of amyloid precursor protein. Conspicuously, many links pointed to an involvement of the FOXP2-driven network in JAK/STAT signaling and the regulation of the ezrin-radixin-moesin complex. Altogether, the applied phylogenetic perspective substantiated FOXP2's importance for nervous system development, maintenance, and functioning. However, the study also disclosed new regulatory pathways that might prove to be useful for understanding the molecular background of the aforementioned developmental disorders and neurodegenerative diseases.
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Affiliation(s)
- Franz Oswald
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center UlmUlm, Germany
| | - Patricia Klöble
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center UlmUlm, Germany
| | - André Ruland
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center UlmUlm, Germany
| | - David Rosenkranz
- Institut für Organismische und Molekulare Evolutionsbiologie, Johannes Gutenberg-University MainzMainz, Germany
| | - Bastian Hinz
- Institut für Organismische und Molekulare Evolutionsbiologie, Johannes Gutenberg-University MainzMainz, Germany
- Institute of Human Genetics, University Medical Center MainzMainz, Germany
| | - Falk Butter
- Institute of Molecular BiologyMainz, Germany
| | | | - Ulrich Zechner
- Institute of Human Genetics, University Medical Center MainzMainz, Germany
- Dr. Senckenbergisches Zentrum für HumangenetikFrankfurt, Germany
| | - Holger Herlyn
- Institut für Organismische und Molekulare Evolutionsbiologie, Johannes Gutenberg-University MainzMainz, Germany
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29
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Haberstroh J, Oswald F, Pantel J. ENSURE PROJECT: SUPPORTED DECISION-MAKING AND CAPACITY ASSESSMENT IN CLINICAL DEMENTIA RESEARCH. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- J. Haberstroh
- Frankfurt Forum for Interdisciplinary Ageing Research, Goethe University Frankfurt, Frankfurt am Main, DEUTSCHLAND, Germany
| | - F. Oswald
- Frankfurt Forum for Interdisciplinary Ageing Research, Goethe University Frankfurt, Frankfurt am Main, DEUTSCHLAND, Germany
| | - J. Pantel
- Frankfurt Forum for Interdisciplinary Ageing Research, Goethe University Frankfurt, Frankfurt am Main, DEUTSCHLAND, Germany
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30
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Schwedler A, Konopik N, Schulz L, Oswald F, Wellenhofer M, Salgo L, Zenz G. HUMAN DIGNITY AND THE RIGHT OF PERSONHOOD: LEGAL PROTECTION FOR ELDERS AT HOME IN GERMANY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - N. Konopik
- Faculty of Educational Sciences, Frankfurt, Germany
| | - L. Schulz
- Faculty of Educational Sciences, Frankfurt, Germany
| | - F. Oswald
- Faculty of Educational Sciences, Frankfurt, Germany
| | | | - L. Salgo
- Faculty of Law, University, Frankfurt, Germany,
| | - G. Zenz
- Faculty of Educational Sciences, Frankfurt, Germany
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31
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Alert K, Zank S, Oswald F. SELF-IMAGES OF CHILDLESS AND SINGLE ELDERS FROM A BIOGRAPHICAL PERSPECTIVE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K. Alert
- University of Cologne, Cologne, Germany,
| | - S. Zank
- University of Cologne, Cologne, Germany,
| | - F. Oswald
- Goethe University Frankfurt, Frankfurt am Main, Germany
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32
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Doh M, Oswald F. ICT AND AGING—DETERMINANTS AND NEW CONCEPTS OF DIGITAL INLCUSION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M. Doh
- Institute of Psychology, Heidelberg, Baden-Württemberg, Germany
| | - F. Oswald
- Goethe University Frankfurt, Frankfurt, Germany
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33
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Leontowitsch M, Fooken I, Oswald F, Kramer N. OLDER MEN LIVING ALONE—INSIGHTS FROM A GERMAN PILOT STUDY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M. Leontowitsch
- Faculty of Educational Sciences, Goethe-University Frankfurt am Main, Frankfurt am Main, Hessen, Germany,
| | - I. Fooken
- Faculty of Educational Sciences, Goethe-University Frankfurt am Main, Frankfurt am Main, Hessen, Germany,
| | - F. Oswald
- Faculty of Educational Sciences, Goethe-University Frankfurt am Main, Frankfurt am Main, Hessen, Germany,
| | - N. Kramer
- Institute of Historical Studies, Goethe-University Frankfurt am Main, Hessen, Germany
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Penger S, Oswald F, Conrad K, Siedentop S, Wittowsky D. SUMMER IN THE CITY: BEING OUT AND ABOUT IN THE FACE OF FUTURE CLIMATE CHANGE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S.G. Penger
- Frankfurt Forum for Interdisciplinary Ageing Research (FFIA), Interdisciplinary Ageing Research (IAW), Goethe University Frankfurt, Germany, Frankfurt Main, Germany,
| | - F. Oswald
- Frankfurt Forum for Interdisciplinary Ageing Research (FFIA), Interdisciplinary Ageing Research (IAW), Goethe University Frankfurt, Germany, Frankfurt Main, Germany,
| | - K. Conrad
- ILS-Research Institute for Regional and Urban Development GmbH, Dortmund, Germany, Germany
| | - S. Siedentop
- ILS-Research Institute for Regional and Urban Development GmbH, Dortmund, Germany, Germany
| | - D. Wittowsky
- ILS-Research Institute for Regional and Urban Development GmbH, Dortmund, Germany, Germany
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35
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Mitchell A, Eisenstein A, Oswald F. ENVIRONMENTAL GERONTOLOGY: OLDER ADULT PARTICIPATION IN DESIGN FROM NURSING HOME TO NEIGHBORHOOD. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A.B. Mitchell
- Thomas Jefferson University, Philadelphia, Pennsylvania
| | | | - F. Oswald
- Goethe University Frankfurt, Frankfurt, Germany
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36
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Grancini G, Roldán-Carmona C, Zimmermann I, Mosconi E, Lee X, Martineau D, Narbey S, Oswald F, De Angelis F, Graetzel M, Nazeeruddin MK. One-Year stable perovskite solar cells by 2D/3D interface engineering. Nat Commun 2017; 8:15684. [PMID: 28569749 PMCID: PMC5461484 DOI: 10.1038/ncomms15684] [Citation(s) in RCA: 502] [Impact Index Per Article: 71.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 04/20/2017] [Indexed: 01/20/2023] Open
Abstract
Despite the impressive photovoltaic performances with power conversion efficiency beyond 22%, perovskite solar cells are poorly stable under operation, failing by far the market requirements. Various technological approaches have been proposed to overcome the instability problem, which, while delivering appreciable incremental improvements, are still far from a market-proof solution. Here we show one-year stable perovskite devices by engineering an ultra-stable 2D/3D (HOOC(CH2)4NH3)2PbI4/CH3NH3PbI3 perovskite junction. The 2D/3D forms an exceptional gradually-organized multi-dimensional interface that yields up to 12.9% efficiency in a carbon-based architecture, and 14.6% in standard mesoporous solar cells. To demonstrate the up-scale potential of our technology, we fabricate 10 × 10 cm2 solar modules by a fully printable industrial-scale process, delivering 11.2% efficiency stable for >10,000 h with zero loss in performances measured under controlled standard conditions. This innovative stable and low-cost architecture will enable the timely commercialization of perovskite solar cells. Up-scaling represents a key challenge for photovoltaics based on metal halide perovskites. Using a composite of 2D and 3D perovskites in combination with a printable carbon black/graphite counter electrode; Grancini et al., report 11.2% efficient modules stable over 10,000 hours.
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Affiliation(s)
- G Grancini
- Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Sion CH-1951, Switzerland
| | - C Roldán-Carmona
- Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Sion CH-1951, Switzerland
| | - I Zimmermann
- Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Sion CH-1951, Switzerland
| | - E Mosconi
- Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), CNR-ISTM, Via Elce di Sotto 8, Perugia I-06123, Italy.,Computet, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - X Lee
- Laboratory for Photonics and Interfaces (LPI), Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, Lausanne CH-1015, Switzerland
| | - D Martineau
- Solaronix S.A. Rue de l'Ouriette 129, Aubonne 1170, Switzerland
| | - S Narbey
- Solaronix S.A. Rue de l'Ouriette 129, Aubonne 1170, Switzerland
| | - F Oswald
- Solaronix S.A. Rue de l'Ouriette 129, Aubonne 1170, Switzerland
| | - F De Angelis
- Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), CNR-ISTM, Via Elce di Sotto 8, Perugia I-06123, Italy.,Computet, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - M Graetzel
- Laboratory for Photonics and Interfaces (LPI), Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, Lausanne CH-1015, Switzerland
| | - Mohammad Khaja Nazeeruddin
- Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Sion CH-1951, Switzerland
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37
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Tabaja N, Yuan Z, Oswald F, Kovall RA. Structure-function analysis of RBP-J-interacting and tubulin-associated (RITA) reveals regions critical for repression of Notch target genes. J Biol Chem 2017; 292:10549-10563. [PMID: 28487372 DOI: 10.1074/jbc.m117.791707] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 04/17/2017] [Revised: 05/04/2017] [Indexed: 11/06/2022] Open
Abstract
The Notch pathway is a cell-to-cell signaling mechanism that is essential for tissue development and maintenance, and aberrant Notch signaling has been implicated in various cancers, congenital defects, and cardiovascular diseases. Notch signaling activates the expression of target genes, which are regulated by the transcription factor CSL (CBF1/RBP-J, Su(H), Lag-1). CSL interacts with both transcriptional corepressor and coactivator proteins, functioning as both a repressor and activator, respectively. Although Notch activation complexes are relatively well understood at the structural level, less is known about how CSL interacts with corepressors. Recently, a new RBP-J (mammalian CSL ortholog)-interacting protein termed RITA has been identified and shown to export RBP-J out of the nucleus, thereby leading to the down-regulation of Notch target gene expression. However, the molecular details of RBP-J/RITA interactions are unclear. Here, using a combination of biochemical/cellular, structural, and biophysical techniques, we demonstrate that endogenous RBP-J and RITA proteins interact in cells, map the binding regions necessary for RBP-J·RITA complex formation, and determine the X-ray structure of the RBP-J·RITA complex bound to DNA. To validate the structure and glean more insights into function, we tested structure-based RBP-J and RITA mutants with biochemical/cellular assays and isothermal titration calorimetry. Whereas our structural and biophysical studies demonstrate that RITA binds RBP-J similarly to the RAM (RBP-J-associated molecule) domain of Notch, our biochemical and cellular assays suggest that RITA interacts with additional regions in RBP-J. Taken together, these results provide molecular insights into the mechanism of RITA-mediated regulation of Notch signaling, contributing to our understanding of how CSL functions as a transcriptional repressor of Notch target genes.
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Affiliation(s)
- Nassif Tabaja
- From the Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267 and
| | - Zhenyu Yuan
- From the Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267 and
| | - Franz Oswald
- the Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, 89081 Ulm, Germany
| | - Rhett A Kovall
- From the Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267 and
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Abstract
RBPJ is the central transcription factor that controls the Notch-dependent transcriptional response by coordinating repressing histone H3K27 deacetylation and activating histone H3K4 methylation. Here, we discuss the molecular mechanisms how RBPJ interacts with opposing NCoR/HDAC-corepressing or KMT2D/UTX-coactivating complexes and how this is controlled by phosphorylation of chromatin modifiers.
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Affiliation(s)
| | - Franz Oswald
- b Department of Internal Medicine I , Center for Internal Medicine, University Medical Center Ulm , Ulm , Germany
| | - Tilman Borggrefe
- a Institute of Biochemistry, Justus Liebig University , Giessen , Germany
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39
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Abstract
Notch signaling is iteratively used throughout development to maintain stem cell potential or in other instances allow differentiation. The central transcription factor in Notch signaling is CBF-1/RBP-J, Su(H), Lag-1 (CSL)—Su(H) in Drosophila—which functions as a molecular switch between transcriptional activation and repression. Su(H) represses transcription by forming a complex with the corepressor Hairless (H). The Su(H)-repressor complex not only competes with the Notch intracellular domain (NICD) but also configures the local chromatin landscape. In this issue, Yuan and colleagues determined the structure of the Su(H)/H complex, showing that a major conformational change within Su(H) explains why the binding of NICD and H is mutually exclusive. This Primer examines recent research that reveals the structural rearrangements that determine whether the Notch pathway transcription factor CSL/Su(H) activates or represses transcription.
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Affiliation(s)
- Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Giessen, Germany
- * E-mail:
| | - Franz Oswald
- Center for Internal Medicine, Department of Internal Medicine I, University Medical Center Ulm, Ulm, Germany
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40
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Vegi NM, Klappacher J, Oswald F, Mulaw MA, Mandoli A, Thiel VN, Bamezai S, Feder K, Martens JHA, Rawat VPS, Mandal T, Quintanilla-Martinez L, Spiekermann K, Hiddemann W, Döhner K, Döhner H, Stunnenberg HG, Feuring-Buske M, Buske C. MEIS2 Is an Oncogenic Partner in AML1-ETO-Positive AML. Cell Rep 2016; 16:498-507. [PMID: 27346355 DOI: 10.1016/j.celrep.2016.05.094] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 04/20/2016] [Accepted: 05/27/2016] [Indexed: 11/28/2022] Open
Abstract
Homeobox genes are known to be key factors in leukemogenesis. Although the TALE family homeodomain factor Meis1 has been linked to malignancy, a role for MEIS2 is less clear. Here, we demonstrate that MEIS2 is expressed at high levels in patients with AML1-ETO-positive acute myeloid leukemia and that growth of AML1-ETO-positive leukemia depends on MEIS2 expression. In mice, MEIS2 collaborates with AML1-ETO to induce acute myeloid leukemia. MEIS2 binds strongly to the Runt domain of AML1-ETO, indicating a direct interaction between these transcription factors. High expression of MEIS2 impairs repressive DNA binding of AML1-ETO, inducing increased expression of genes such as the druggable proto-oncogene YES1. Collectively, these data describe a pivotal role for MEIS2 in AML1-ETO-induced leukemia.
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Affiliation(s)
- Naidu M Vegi
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Josef Klappacher
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Medhanie A Mulaw
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Amit Mandoli
- Department of Molecular Biology, Faculty of Science, Nijmegen Centre for Molecular Life Sciences, Radboud University, 6500HB Nijmegen, the Netherlands
| | - Verena N Thiel
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Shiva Bamezai
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Kristin Feder
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Joost H A Martens
- Department of Molecular Biology, Faculty of Science, Nijmegen Centre for Molecular Life Sciences, Radboud University, 6500HB Nijmegen, the Netherlands
| | - Vijay P S Rawat
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Tamoghna Mandal
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany
| | - Leticia Quintanilla-Martinez
- Institute of Pathology and Neuropathology, Eberhard Karls University of Tübingen and Comprehensive Cancer Center, University Hospital Tübingen, Liebermeisterstrasse 8, 72076 Tübingen, Germany
| | - Karsten Spiekermann
- Department of Internal Medicine III, University Hospital Grosshadern, Ludwig-Maximilians-University (LMU), 81377 Munich, Germany
| | - Wolfgang Hiddemann
- Department of Internal Medicine III, University Hospital Grosshadern, Ludwig-Maximilians-University (LMU), 81377 Munich, Germany
| | - Konstanze Döhner
- Department of Internal Medicine III, University Hospital Ulm, 89081 Ulm, Germany
| | - Hartmut Döhner
- Department of Internal Medicine III, University Hospital Ulm, 89081 Ulm, Germany
| | - Hendrik G Stunnenberg
- Department of Molecular Biology, Faculty of Science, Nijmegen Centre for Molecular Life Sciences, Radboud University, 6500HB Nijmegen, the Netherlands
| | | | - Christian Buske
- Institute of Experimental Cancer Research, CCC and University Hospital of Ulm, 89081 Ulm, Germany; Core Facility Genomics, Medical Faculty Ulm, Ulm University, 89081 Ulm, Germany.
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41
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Oswald F, Rodriguez P, Giaimo BD, Antonello ZA, Mira L, Mittler G, Thiel VN, Collins KJ, Tabaja N, Cizelsky W, Rothe M, Kühl SJ, Kühl M, Ferrante F, Hein K, Kovall RA, Dominguez M, Borggrefe T. A phospho-dependent mechanism involving NCoR and KMT2D controls a permissive chromatin state at Notch target genes. Nucleic Acids Res 2016; 44:4703-20. [PMID: 26912830 PMCID: PMC4889922 DOI: 10.1093/nar/gkw105] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/11/2016] [Indexed: 01/24/2023] Open
Abstract
The transcriptional shift from repression to activation of target genes is crucial for the fidelity of Notch responses through incompletely understood mechanisms that likely involve chromatin-based control. To activate silenced genes, repressive chromatin marks are removed and active marks must be acquired. Histone H3 lysine-4 (H3K4) demethylases are key chromatin modifiers that establish the repressive chromatin state at Notch target genes. However, the counteracting histone methyltransferase required for the active chromatin state remained elusive. Here, we show that the RBP-J interacting factor SHARP is not only able to interact with the NCoR corepressor complex, but also with the H3K4 methyltransferase KMT2D coactivator complex. KMT2D and NCoR compete for the C-terminal SPOC-domain of SHARP. We reveal that the SPOC-domain exclusively binds to phosphorylated NCoR. The balance between NCoR and KMT2D binding is shifted upon mutating the phosphorylation sites of NCoR or upon inhibition of the NCoR kinase CK2β. Furthermore, we show that the homologs of SHARP and KMT2D in Drosophila also physically interact and control Notch-mediated functions in vivo. Together, our findings reveal how signaling can fine-tune a committed chromatin state by phosphorylation of a pivotal chromatin-modifier.
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Affiliation(s)
- Franz Oswald
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Patrick Rodriguez
- Swiss Institute for Experimental Cancer Research, Lausanne, Switzerland
| | - Benedetto Daniele Giaimo
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany Spemann Graduate School of Biology and Medicine (SGBM), Faculty of Biology, Albert Ludwigs University Freiburg, Germany
| | - Zeus A Antonello
- Instituto de Neurociencias, Consejo Superior de Investigaciones Cientificas-Universidad Miguel Hernández, Campus de Sant Joan, Alicante, Spain
| | - Laura Mira
- Instituto de Neurociencias, Consejo Superior de Investigaciones Cientificas-Universidad Miguel Hernández, Campus de Sant Joan, Alicante, Spain
| | - Gerhard Mittler
- Max-Planck-Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Verena N Thiel
- University Medical Center Ulm, Center for Internal Medicine, Department of Internal Medicine I, Albert-Einstein-Allee 23, 89081 Ulm, Germany
| | - Kelly J Collins
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Nassif Tabaja
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Wiebke Cizelsky
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany International Graduate School in Molecular Medicine Ulm (IGradU), Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Melanie Rothe
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany International Graduate School in Molecular Medicine Ulm (IGradU), Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Susanne J Kühl
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Michael Kühl
- Institute for Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Francesca Ferrante
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Kerstin Hein
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Rhett A Kovall
- Department of Molecular Genetics, Biochemistry, and Microbiology, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Maria Dominguez
- Instituto de Neurociencias, Consejo Superior de Investigaciones Cientificas-Universidad Miguel Hernández, Campus de Sant Joan, Alicante, Spain
| | - Tilman Borggrefe
- Institute of Biochemistry, University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
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42
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Borggrefe T, Lauth M, Zwijsen A, Huylebroeck D, Oswald F, Giaimo BD. The Notch intracellular domain integrates signals from Wnt, Hedgehog, TGFβ/BMP and hypoxia pathways. Biochim Biophys Acta 2015; 1863:303-13. [PMID: 26592459 DOI: 10.1016/j.bbamcr.2015.11.020] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 11/18/2015] [Accepted: 11/19/2015] [Indexed: 01/12/2023]
Abstract
Notch signaling is a highly conserved signal transduction pathway that regulates stem cell maintenance and differentiation in several organ systems. Upon activation, the Notch receptor is proteolytically processed, its intracellular domain (NICD) translocates into the nucleus and activates expression of target genes. Output, strength and duration of the signal are tightly regulated by post-translational modifications. Here we review the intracellular post-translational regulation of Notch that fine-tunes the outcome of the Notch response. We also describe how crosstalk with other conserved signaling pathways like the Wnt, Hedgehog, hypoxia and TGFβ/BMP pathways can affect Notch signaling output. This regulation can happen by regulation of ligand, receptor or transcription factor expression, regulation of protein stability of intracellular key components, usage of the same cofactors or coregulation of the same key target genes. Since carcinogenesis is often dependent on at least two of these pathways, a better understanding of their molecular crosstalk is pivotal.
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Affiliation(s)
| | - Matthias Lauth
- Institute of Molecular Biology and Tumor Research, Philipps University Marburg, Germany
| | - An Zwijsen
- VIB Center for the Biology of Disease and Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Danny Huylebroeck
- Department of Cell Biology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Franz Oswald
- University Medical Center Ulm, Department of Internal Medicine I, Ulm, Germany
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43
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Brockmann B, Mastel H, Oswald F, Maier D. Analysis of the interaction between human RITA and Drosophila Suppressor of Hairless. Hereditas 2015; 151:209-19. [PMID: 25588307 DOI: 10.1111/hrd2.00074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/01/2014] [Indexed: 10/24/2022] Open
Abstract
Notch signalling mediates intercellular communication, which is effected by the transcription factor CSL, an acronym for vertebrate CBF1/RBP-J, Drosophila Suppressor of Hairless [Su(H)] and C. elegans Lag1. Nuclear import of CBF1/RBP-J depends on co-activators and co-repressors, whereas the export relies on RITA. RITA is a tubulin and CBF1/RBP-J binding protein acting as a negative regulator of Notch signalling in vertebrates. RITA protein is highly conserved in eumatazoa, but no Drosophila homologue was yet identified. In this work, the activity of human RITA in the fly was addressed. To this end, we generated transgenic flies that allow a tissue specific induction of human RITA, which was demonstrated by Western blotting and in fly tissues. Unexpectedly, overexpression of RITA during fly development had little phenotypic consequences, even when overexpressed simultaneously with either Su(H) or the Notch antagonist Hairless. We demonstrate the in vivo binding of human RITA to Su(H) and to tubulin by co-immune precipitation. Moreover, RITA and tubulin co-localized to some degree in several Drosophila tissues. Overall our data show that human RITA, albeit binding to Drosophila Su(H) and tubulin, cannot influence the Notch signalling pathway in the fly, suggesting that a nuclear export mechanism of Su(H), if existent in Drosophila, does not depend on RITA.
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Affiliation(s)
- Birgit Brockmann
- Institute of Genetics, University of Hohenheim, Stuttgart, Germany
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44
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Hein K, Mittler G, Cizelsky W, Kühl M, Ferrante F, Liefke R, Berger IM, Just S, Sträng JE, Kestler HA, Oswald F, Borggrefe T. Site-specific methylation of Notch1 controls the amplitude and duration of the Notch1 response. Sci Signal 2015; 8:ra30. [PMID: 25805888 DOI: 10.1126/scisignal.2005892] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Physiologically, Notch signal transduction plays a pivotal role in differentiation; pathologically, Notch signaling contributes to the development of cancer. Transcriptional activation of Notch target genes involves cleavage of the Notch receptor in response to ligand binding, production of the Notch intracellular domain (NICD), and NICD migration into the nucleus and assembly of a coactivator complex. Posttranslational modifications of the NICD are important for its transcriptional activity and protein turnover. Deregulation of Notch signaling and stabilizing mutations of Notch1 have been linked to leukemia development. We found that the methyltransferase CARM1 (coactivator-associated arginine methyltransferase 1; also known as PRMT4) methylated NICD at five conserved arginine residues within the C-terminal transactivation domain. CARM1 physically and functionally interacted with the NICD-coactivator complex and was found at gene enhancers in a Notch-dependent manner. Although a methylation-defective NICD mutant was biochemically more stable, this mutant was biologically less active as measured with Notch assays in embryos of Xenopus laevis and Danio rerio. Mathematical modeling indicated that full but short and transient Notch signaling required methylation of NICD.
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Affiliation(s)
- Kerstin Hein
- Max-Planck-Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany. Institute of Biochemistry, University of Giessen, 35392 Giessen, Germany
| | - Gerhard Mittler
- Max-Planck-Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany. BIOSS, Center for Biological Signalling Studies, University of Freiburg, Schänzlestrasse 18, 79104 Freiburg, Germany
| | - Wiebke Cizelsky
- Institute for Biochemistry and Molecular Biology, Ulm University, 89081 Ulm, Germany
| | - Michael Kühl
- Institute for Biochemistry and Molecular Biology, Ulm University, 89081 Ulm, Germany
| | - Francesca Ferrante
- Institute of Biochemistry, University of Giessen, 35392 Giessen, Germany
| | - Robert Liefke
- Department of Cell Biology, Harvard Medical School and Division of Newborn Medicine, Boston Children's Hospital, Boston, MA 02215, USA
| | - Ina M Berger
- Department of Internal Medicine II, Center for Internal Medicine, University Medical Center Ulm, 89081 Ulm, Germany
| | - Steffen Just
- Department of Internal Medicine II, Center for Internal Medicine, University Medical Center Ulm, 89081 Ulm, Germany
| | - J Eric Sträng
- Core Unit Medical Systems Biology, Institute of Neural Information Processing, Ulm University, 89069 Ulm, Germany
| | - Hans A Kestler
- Core Unit Medical Systems Biology, Institute of Neural Information Processing, Ulm University, 89069 Ulm, Germany. Friedrich-Schiller University and Fritz Lipmann Institute, Leibniz Institute for Aging Research, D-07745 Jena, Germany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, 89081 Ulm, Germany.
| | - Tilman Borggrefe
- Max-Planck-Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany. Institute of Biochemistry, University of Giessen, 35392 Giessen, Germany.
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45
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Münzberg C, Höhn K, Krndija D, Maaß U, Bartsch DK, Slater EP, Oswald F, Walther P, Seufferlein T, von Wichert G. IGF-1 drives chromogranin A secretion via activation of Arf1 in human neuroendocrine tumour cells. J Cell Mol Med 2015; 19:948-59. [PMID: 25754106 PMCID: PMC4420598 DOI: 10.1111/jcmm.12473] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 09/15/2014] [Indexed: 01/18/2023] Open
Abstract
Hypersecretion is the major symptom of functional neuroendocrine tumours. The mechanisms that contribute to this excessive secretion of hormones are still elusive. A key event in secretion is the exit of secretory products from the Golgi apparatus. ADP-ribosylation factor (Arf) GTPases are known to control vesicle budding and trafficking, and have a leading function in the regulation of formation of secretory granula at the Golgi. Here, we show that Arf1 is the predominant Arf protein family member expressed in the neuroendocrine pancreatic tumour cell lines BON and QGP-1. In BON cells Arf1 colocalizes with Golgi markers as well as chromogranin A, and shows significant basal activity. The inhibition of Arf1 activity or expression significantly impaired secretion of chromogranin A. Furthermore, we show that the insulin-like growth factor 1 (IGF-1), a major regulator of growth and secretion in BON cells, induces Arf1 activity. We found that activation of Arf1 upon IGF-1 receptor stimulation is mediated by MEK/ERK signalling pathway in BON and QGP-1 cells. Moreover, the activity of Arf1 in BON cells is mediated by autocrinely secreted IGF-1, and concomitantly, autocrine IGF1 secretion is maintained by Arf1 activity. In summary, our data indicate an important regulatory role for Arf1 at the Golgi in hypersecretion in neuroendocrine cancer cells.
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46
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Qin R, Schmid H, Münzberg C, Maass U, Krndija D, Adler G, Seufferlein T, Liedert A, Ignatius A, Oswald F, Eiseler T, von Wichert G. Phosphorylation and turnover of paxillin in focal contacts is controlled by force and defines the dynamic state of the adhesion site. Cytoskeleton (Hoboken) 2015; 72:101-12. [PMID: 25620625 DOI: 10.1002/cm.21209] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 12/26/2014] [Accepted: 12/31/2014] [Indexed: 01/09/2023]
Abstract
Micro-environmental clues are critical to cell behavior. One of the key elements of migration is the generation and response to forces. Up to now there is no definitive concept on how the generation and responses to cellular forces influence cell behavior. Here, we show that phosphorylation of paxillin is a crucial event in the response to exogenous forces. Application of force induced growth of adhesion sites and this phenomenon was accompanied by a downregulation of Src family kinase activity, which in turn led to a decrease in the phosphorylation of paxillin at the tyrosine residues Y31 and Y118. The force-dependent growth of adhesion sites is mediated by a decrease in the turnover-rate of paxillin in focal contacts. This turnover critically depended on the phosphorylation state of paxillin at Y31/118. Paxillin is an important regulator in the control of the aggregate state of the whole adhesion site since the turnover of other adhesion site proteins such as vinculin is influenced by the phosphorylation state of paxillin as well. Taken together these data suggest that SFK dependent phosphorylation of paxillin is a crucial event in the regulation of adhesion site function in response to force.
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Affiliation(s)
- Ruifang Qin
- Department of Internal Medicine I, University of Ulm, Albert Einstein Allee 23, Ulm, Germany
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47
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Gittins JR, D'Angelo C, Oswald F, Edwards RJ, Wiedenmann J. Fluorescent protein-mediated colour polymorphism in reef corals: multicopy genes extend the adaptation/acclimatization potential to variable light environments. Mol Ecol 2015; 24:453-65. [PMID: 25496144 PMCID: PMC4949654 DOI: 10.1111/mec.13041] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 12/05/2014] [Accepted: 12/09/2014] [Indexed: 01/22/2023]
Abstract
The genomic framework that enables corals to adjust to unfavourable conditions is crucial for coral reef survival in a rapidly changing climate. We have explored the striking intraspecific variability in the expression of coral pigments from the green fluorescent protein (GFP) family to elucidate the genomic basis for the plasticity of stress responses among reef corals. We show that multicopy genes can greatly increase the dynamic range over which corals can modulate transcript levels in response to the light environment. Using the red fluorescent protein amilFP597 in the coral Acropora millepora as a model, we demonstrate that its expression increases with light intensity, but both the minimal and maximal gene transcript levels vary markedly among colour morphs. The pigment concentration in the tissue of different morphs is strongly correlated with the number of gene copies with a particular promoter type. These findings indicate that colour polymorphism in reef corals can be caused by the environmentally regulated expression of multicopy genes. High-level expression of amilFP597 is correlated with reduced photodamage of zooxanthellae under acute light stress, supporting a photoprotective function of this pigment. The cluster of light-regulated pigment genes can enable corals to invest either in expensive high-level pigmentation, offering benefits under light stress, or to rely on low tissue pigment concentrations and use the conserved resources for other purposes, which is preferable in less light-exposed environments. The genomic framework described here allows corals to pursue different strategies to succeed in habitats with highly variable light stress levels. In summary, our results suggest that the intraspecific plasticity of reef corals' stress responses is larger than previously thought.
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Affiliation(s)
- John R. Gittins
- Coral Reef Laboratory, Ocean and Earth ScienceNational Oceanography CentreUniversity of SouthamptonWaterfront CampusSouthamptonSO14 3ZHUK
| | - Cecilia D'Angelo
- Coral Reef Laboratory, Ocean and Earth ScienceNational Oceanography CentreUniversity of SouthamptonWaterfront CampusSouthamptonSO14 3ZHUK
| | - Franz Oswald
- Department of Internal Medicine IUniversity Medical Center Ulm89081UlmGermany
| | - Richard J. Edwards
- School of Biotechnology and Biomolecular SciencesThe University of New South WalesSydneyNSW2052Australia
- Centre for Biological SciencesUniversity of SouthamptonHighfield CampusSouthamptonSO17 1BJUK
- Institute for Life SciencesUniversity of SouthamptonHighfield CampusSouthamptonSO17 1BJUK
| | - Jörg Wiedenmann
- Coral Reef Laboratory, Ocean and Earth ScienceNational Oceanography CentreUniversity of SouthamptonWaterfront CampusSouthamptonSO14 3ZHUK
- Institute for Life SciencesUniversity of SouthamptonHighfield CampusSouthamptonSO17 1BJUK
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48
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Steinhäuser K, Oswald F, Kreis NN, Louwen F, Yuan J. Function and regulation of the novel tubulin-associated protein RITA in mitosis. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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49
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Affiliation(s)
- O. G. Folberth
- Aus dem Forschungslaboratorium der Siemens-Schuckertwerke AG. Erlangen
| | - F. Oswald
- Aus dem Forschungslaboratorium der Siemens-Schuckertwerke AG. Erlangen
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50
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Affiliation(s)
- F. Oswald
- Forschungslaboratorium der Siemens-Schuckertwerke Erlangen
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