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Paluschinski M, Schira-Heinen J, Pellegrino R, Heij LR, Bednarsch J, Neumann UP, Longerich T, Stuehler K, Luedde T, Castoldi M. Uncovering Novel Roles of miR-122 in the Pathophysiology of the Liver: Potential Interaction with NRF1 and E2F4 Signaling. Cancers (Basel) 2023; 15:4129. [PMID: 37627157 PMCID: PMC10453129 DOI: 10.3390/cancers15164129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/07/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
MicroRNA miR-122 plays a pivotal role in liver function. Despite numerous studies investigating this miRNA, the global network of genes regulated by miR-122 and its contribution to the underlying pathophysiological mechanisms remain largely unknown. To gain a deeper understanding of miR-122 activity, we employed two complementary approaches. Firstly, through transcriptome analysis of polyribosome-bound RNAs, we discovered that miR-122 exhibits potential antagonistic effects on specific transcription factors known to be dysregulated in liver disease, including nuclear respiratory factor-1 (NRF1) and the E2F transcription factor 4 (E2F4). Secondly, through proteome analysis of hepatoma cells transfected with either miR-122 mimic or antagomir, we discovered changes in several proteins associated with increased malignancy. Interestingly, many of these proteins were reported to be transcriptionally regulated by NRF1 and E2F4, six of which we validated as miR-122 targets. Among these, a negative correlation was observed between miR-122 and glucose-6-phosphate dehydrogenase levels in the livers of patients with hepatitis B virus-associated hepatocellular carcinoma. This study provides novel insights into potential alterations of molecular pathway occurring at the early stages of liver disease, driven by the dysregulation of miR-122 and its associated genes.
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Affiliation(s)
- Martha Paluschinski
- Department of Gastroenterology, Hepatology and Infectious Diseases, Medical Faculty and University Hospital, Heinrich Heine University Dusseldorf, 40225 Dusseldorf, Germany; (M.P.); (T.L.)
| | - Jessica Schira-Heinen
- Department of Neurology, Medical Faculty, Heinrich-Heine-University, 40225 Dusseldorf, Germany;
- Molecular Proteomics Laboratory (MPL), Institute for Molecular Medicine, Heinrich-Heine-University, 40225 Dusseldorf, Germany;
| | - Rossella Pellegrino
- Institute of Pathology, University Hospital Heidelberg, 69120 Heidelberg, Germany; (R.P.); (T.L.)
| | - Lara R. Heij
- Department of Surgery and Transplantation, University Hospital RWTH Aachen, 52074 Aachen, Germany; (L.R.H.); (J.B.); (U.P.N.)
| | - Jan Bednarsch
- Department of Surgery and Transplantation, University Hospital RWTH Aachen, 52074 Aachen, Germany; (L.R.H.); (J.B.); (U.P.N.)
| | - Ulf P. Neumann
- Department of Surgery and Transplantation, University Hospital RWTH Aachen, 52074 Aachen, Germany; (L.R.H.); (J.B.); (U.P.N.)
| | - Thomas Longerich
- Institute of Pathology, University Hospital Heidelberg, 69120 Heidelberg, Germany; (R.P.); (T.L.)
| | - Kai Stuehler
- Molecular Proteomics Laboratory (MPL), Institute for Molecular Medicine, Heinrich-Heine-University, 40225 Dusseldorf, Germany;
| | - Tom Luedde
- Department of Gastroenterology, Hepatology and Infectious Diseases, Medical Faculty and University Hospital, Heinrich Heine University Dusseldorf, 40225 Dusseldorf, Germany; (M.P.); (T.L.)
| | - Mirco Castoldi
- Department of Gastroenterology, Hepatology and Infectious Diseases, Medical Faculty and University Hospital, Heinrich Heine University Dusseldorf, 40225 Dusseldorf, Germany; (M.P.); (T.L.)
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Ter Horst H, Brazda N, Schira-Heinen J, Krebbers J, Müller HW, Cimiano P. Automatic knowledge graph population with model-complete text comprehension for pre-clinical outcomes in the field of spinal cord injury. Artif Intell Med 2023; 137:102491. [PMID: 36868686 DOI: 10.1016/j.artmed.2023.102491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/16/2022] [Accepted: 01/11/2023] [Indexed: 01/19/2023]
Abstract
The paradigm of evidence-based medicine requires that medical decisions are made on the basis of the best available knowledge published in the literature. Existing evidence is often summarized in the form of systematic reviews and/or meta-reviews and is rarely available in a structured form. Manual compilation and aggregation is costly, and conducting a systematic review represents a high effort. The need to aggregate evidence arises not only in the context of clinical trials, but is also important in the context of pre-clinical animal studies. In this context, evidence extraction is important to support translation of the most promising pre-clinical therapies into clinical trials or to optimize clinical trial design. Aiming at developing methods that facilitate the task of aggregating evidence published in pre-clinical studies, in this paper a new system is presented that automatically extracts structured knowledge from such publications and stores it in a so-called domain knowledge graph. The approach follows the paradigm of model-complete text comprehension by relying on guidance from a domain ontology creating a deep relational data-structure that reflects the main concepts, protocol, and key findings of studies. Focusing on the domain of spinal cord injuries, a single outcome of a pre-clinical study is described by up to 103 outcome parameters. Since the problem of extracting all these variables together is intractable, we propose a hierarchical architecture that incrementally predicts semantic sub-structures according to a given data model in a bottom-up fashion. At the heart of our approach is a statistical inference method that relies on conditional random fields to infer the most likely instance of the domain model given the text of a scientific publication as input. This approach allows modeling dependencies between the different variables describing a study in a semi-joint fashion. We present a comprehensive evaluation of our system to understand the extent to which our system can capture a study in the depth required to enable the generation of new knowledge. We conclude the article with a brief description of some applications of the populated knowledge graph and show the potential implications of our work for supporting evidence-based medicine.
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Affiliation(s)
- Hendrik Ter Horst
- CITEC, Bielefeld University, Inspiration 1, 33619 Bielefeld, Germany.
| | - Nicole Brazda
- Neurologische Klinik, Universitätsklinikum der Heinrich-Heine-Universität Düsseldorf, Moorenstr. 5 and Center for Neuronal Regeneration, Life Science Center Düsseldorf, Merowingerplatz 1a, 40225 Düsseldorf, Germany
| | - Jessica Schira-Heinen
- Neurologische Klinik, Universitätsklinikum der Heinrich-Heine-Universität Düsseldorf, Moorenstr. 5 and Center for Neuronal Regeneration, Life Science Center Düsseldorf, Merowingerplatz 1a, 40225 Düsseldorf, Germany
| | - Julia Krebbers
- Neurologische Klinik, Universitätsklinikum der Heinrich-Heine-Universität Düsseldorf, Moorenstr. 5 and Center for Neuronal Regeneration, Life Science Center Düsseldorf, Merowingerplatz 1a, 40225 Düsseldorf, Germany
| | - Hans-Werner Müller
- Neurologische Klinik, Universitätsklinikum der Heinrich-Heine-Universität Düsseldorf, Moorenstr. 5 and Center for Neuronal Regeneration, Life Science Center Düsseldorf, Merowingerplatz 1a, 40225 Düsseldorf, Germany
| | - Philipp Cimiano
- CITEC, Bielefeld University, Inspiration 1, 33619 Bielefeld, Germany
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Ding Z, Tan K, Alter C, Temme S, Bouvain P, Owenier C, Hänsch S, Wesselborg S, Peter C, Weidtkamp-Peters S, Flögel U, Schira-Heinen J, Stühler K, Hesse J, Kögler G, Schrader J. Cardiac injection of USSC boosts remuscularization of the infarcted heart by shaping the T-cell response. J Mol Cell Cardiol 2023; 175:29-43. [PMID: 36493853 DOI: 10.1016/j.yjmcc.2022.11.006] [Citation(s) in RCA: 2] [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: 08/23/2022] [Revised: 10/20/2022] [Accepted: 11/18/2022] [Indexed: 12/12/2022]
Abstract
Regenerating the injured heart remains one of the most vexing challenges in cardiovascular medicine. Cell therapy has shown potential for treatment of myocardial infarction, but low cell retention so far has limited its success. Here we show that intramyocardial injection of highly apoptosis-resistant unrestricted somatic stem cells (USSC) into infarcted rat hearts resulted in an unprecedented thickening of the left ventricular wall with cTnT+/BrdU+ cardiomyocytes that was paralleled by progressively restored ejection fraction. USSC induced significant T-cell enrichment in ischemic tissue with enhanced expression of T-cell related cytokines. Inhibition of T-cell activation by anti-CD28 monoclonal antibody, fully abolished the regenerative response which was restored by adoptive T-cell transfer. Secretome analysis of USSC and lineage tracing studies suggest that USSC secrete paracrine factors over an extended period of time which boosts a T-cell driven endogenous regenerative response mainly from adult cardiomyocytes.
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Affiliation(s)
- Zhaoping Ding
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Kezhe Tan
- Department of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Christina Alter
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Sebastian Temme
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Pascal Bouvain
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Christoph Owenier
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Sebastian Hänsch
- Center for Advanced Imaging, Heinrich-Heine University Duesseldorf, Duesseldorf, Germany
| | - Sebastian Wesselborg
- Institute of Molecular Medicine I, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Christoph Peter
- Institute of Molecular Medicine I, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | | | - Ulrich Flögel
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Jessica Schira-Heinen
- Molecular Proteomics Laboratory (MPL), Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Kai Stühler
- Molecular Proteomics Laboratory (MPL), Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Julia Hesse
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Gesine Kögler
- Jose Carreras Stem Cell Bank, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany
| | - Jürgen Schrader
- Department of Molecular Cardiology, Heinrich Heine University of Duesseldorf, Duesseldorf, Germany.
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Schira-Heinen J, Agrelo IS, Estrada V, Küry P. Functional in vivo assessment of stem cell-secreted pro-oligodendroglial factors. Neural Regen Res 2022; 17:2194-2196. [PMID: 35259828 PMCID: PMC9083155 DOI: 10.4103/1673-5374.335800] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Jessica Schira-Heinen
- Department of Neurology, Neuroregeneration Laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Iria Samper Agrelo
- Department of Neurology, Neuroregeneration Laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Veronica Estrada
- Department of Neurology, Neuroregeneration Laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Patrick Küry
- Department of Neurology, Neuroregeneration Laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
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Silva Oliveira Junior M, Schira-Heinen J, Reiche L, Han S, de Amorim VCM, Lewen I, Gruchot J, Göttle P, Akkermann R, Azim K, Küry P. Myelin repair is fostered by the corticosteroid medrysone specifically acting on astroglial subpopulations. EBioMedicine 2022; 83:104204. [PMID: 35952494 PMCID: PMC9385547 DOI: 10.1016/j.ebiom.2022.104204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 06/22/2022] [Accepted: 07/22/2022] [Indexed: 11/26/2022] Open
Abstract
Background Multiple sclerosis is characterised by inflammation, oligodendrocyte loss and axonal demyelination and shows an additional impact on astrocytes, and their polarization. Although a certain degree of spontaneous myelin repair can be observed, disease progression, and aging impair regeneration efforts highlighting the need to better understand glial cell dynamics to establish specific regenerative treatments. Methods Applying a chronic demyelination model, we here analysed demyelination and remyelination related effects on astrocytes and stem cell niches and studied the consequences of medrysone application on myelin repair, and astrocyte polarization. Findings Medrysone induced recovery of mature oligodendrocytes, myelin expression and node formation. In addition, C3d/S100a10 co-expression in astrocytes was enhanced. Moreover, Timp1 expression in C3d positive astrocytes revealed another astrocytic phenotype with a myelination promoting character. Interpretation Based on these findings, specific astrocyte subpopulations are suggested to act in a myelin regenerative way and manner the regulation of which can be positively modulated by this corticosteroid. Funding This work was supported by the Jürgen Manchot Stiftung, the Research Commission of the medical faculty of the Heinrich-Heine-University of Düsseldorf, the Christiane and Claudia Hempel Foundation for clinical stem cell research and the James and Elisabeth Cloppenburg, Peek and Cloppenburg Düsseldorf Stiftung.
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Reiche L, Göttle P, Lane L, Duek P, Park M, Azim K, Schütte J, Manousi A, Schira-Heinen J, Küry P. C21orf91 Regulates Oligodendroglial Precursor Cell Fate-A Switch in the Glial Lineage? Front Cell Neurosci 2021; 15:653075. [PMID: 33796011 PMCID: PMC8008080 DOI: 10.3389/fncel.2021.653075] [Citation(s) in RCA: 6] [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: 01/13/2021] [Accepted: 02/22/2021] [Indexed: 12/16/2022] Open
Abstract
Neuropathological diseases of the central nervous system (CNS) are frequently associated with impaired differentiation of the oligodendroglial cell lineage and subsequent alterations in white matter structure and dynamics. Down syndrome (DS), or trisomy 21, is the most common genetic cause for cognitive impairments and intellectual disability (ID) and is associated with a reduction in the number of neurons and oligodendrocytes, as well as with hypomyelination and astrogliosis. Recent studies mainly focused on neuronal development in DS and underestimated the role of glial cells as pathogenic players. This also relates to C21ORF91, a protein considered a key modulator of aberrant CNS development in DS. We investigated the role of C21orf91 ortholog in terms of oligodendrogenesis and myelination using database information as well as through cultured primary oligodendroglial precursor cells (OPCs). Upon modulation of C21orf91 gene expression, we found this factor to be important for accurate oligodendroglial differentiation, influencing their capacity to mature and to myelinate axons. Interestingly, C21orf91 overexpression initiates a cell population coexpressing astroglial- and oligodendroglial markers indicating that elevated C21orf91 expression levels induce a gliogenic shift towards the astrocytic lineage reflecting non-equilibrated glial cell populations in DS brains.
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Affiliation(s)
- Laura Reiche
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Peter Göttle
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Lydie Lane
- CALIPHO Group, SIB Swiss Institute of Bioinformatics, Geneva, Switzerland.,Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Paula Duek
- CALIPHO Group, SIB Swiss Institute of Bioinformatics, Geneva, Switzerland.,Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Mina Park
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Kasum Azim
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Jana Schütte
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Anastasia Manousi
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Jessica Schira-Heinen
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Patrick Küry
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Manousi A, Göttle P, Reiche L, Cui QL, Healy LM, Akkermann R, Gruchot J, Schira-Heinen J, Antel JP, Hartung HP, Küry P. Identification of novel myelin repair drugs by modulation of oligodendroglial differentiation competence. EBioMedicine 2021; 65:103276. [PMID: 33714029 PMCID: PMC7970057 DOI: 10.1016/j.ebiom.2021.103276] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND In multiple sclerosis loss of myelin and oligodendrocytes impairs saltatory signal transduction and leads to neuronal loss and functional deficits. Limited capacity of oligodendroglial precursor cells to differentiate into mature cells is the main reason for inefficient myelin repair in the central nervous system. Drug repurposing constitutes a powerful approach for identification of pharmacological compounds promoting this process. METHODS A phenotypic compound screening using the subcellular distribution of a potent inhibitor of oligodendroglial cell differentiation, namely p57kip2, as differentiation competence marker was conducted. Hit compounds were validated in terms of their impact on developmental cell differentiation and myelination using both rat and human primary cell cultures and organotypic cerebellar slice cultures, respectively. Their effect on spontaneous remyelination was then investigated following cuprizone-mediated demyelination of the corpus callosum. FINDINGS A number of novel small molecules able to promote oligodendroglial cell differentiation were identified and a subset was found to foster human oligodendrogenesis as well as myelination ex vivo. Among them the steroid danazol and the anthelminthic parbendazole were found to increase myelin repair. INTERPRETATION We provide evidence that early cellular processes involved in differentiation decisions are applicable for the identification of regeneration promoting drugs and we suggest danazol and parbendazole as potent therapeutic candidates for demyelinating diseases. FUNDING This work was supported by the Jürgen Manchot Foundation, Düsseldorf; Research Commission of the Medical Faculty of Heinrich-Heine-University Düsseldorf; Christiane and Claudia Hempel Foundation; Stifterverband/Novartisstiftung; James and Elisabeth Cloppenburg, Peek and Cloppenburg Düsseldorf Stiftung and International Progressive MS Alliance (BRAVEinMS).
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Affiliation(s)
- Anastasia Manousi
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany
| | - Peter Göttle
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany
| | - Laura Reiche
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany
| | - Qiao-Ling Cui
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, QC H4A 3K9, Canada
| | - Luke M Healy
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, QC H4A 3K9, Canada
| | - Rainer Akkermann
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany
| | - Joel Gruchot
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany
| | - Jessica Schira-Heinen
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany
| | - Jack P Antel
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, QC H4A 3K9, Canada
| | - Hans-Peter Hartung
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany; Brain and Mind Centre, University of Sydney, Camperdown NSW 2050, Australia
| | - Patrick Küry
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, 40225, Germany.
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Schira-Heinen J, Grube L, Waldera-Lupa DM, Baberg F, Langini M, Etemad-Parishanzadeh O, Poschmann G, Stühler K. Pitfalls and opportunities in the characterization of unconventionally secreted proteins by secretome analysis. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2019; 1867:140237. [DOI: 10.1016/j.bbapap.2019.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 06/04/2019] [Accepted: 06/06/2019] [Indexed: 02/07/2023]
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Beyer F, Jadasz J, Samper Agrelo I, Schira-Heinen J, Groh J, Manousi A, Bütermann C, Estrada V, Reiche L, Cantone M, Vera J, Viganò F, Dimou L, Müller HW, Hartung HP, Küry P. Heterogeneous fate choice of genetically modulated adult neural stem cells in gray and white matter of the central nervous system. Glia 2019; 68:393-406. [PMID: 31633850 DOI: 10.1002/glia.23724] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 12/16/2022]
Abstract
Apart from dedicated oligodendroglial progenitor cells, adult neural stem cells (aNSCs) can also give rise to new oligodendrocytes in the adult central nervous system (CNS). This process mainly confers myelinating glial cell replacement in pathological situations and can hence contribute to glial heterogeneity. Our previous studies demonstrated that the p57kip2 gene encodes an intrinsic regulator of glial fate acquisition and we here investigated to what degree its modulation can affect stem cell-dependent oligodendrogenesis in different CNS environments. We therefore transplanted p57kip2 knockdown aNSCs into white and gray matter (WM and GM) regions of the mouse brain, into uninjured spinal cords as well as in the vicinity of spinal cord injuries and evaluated integration and differentiation in vivo. Our experiments revealed that under healthy conditions intrinsic suppression of p57kip2 as well as WM localization promote differentiation toward myelinating oligodendrocytes at the expense of astrocyte generation. Moreover, p57kip2 knockdown conferred a strong benefit on cell survival augmenting net oligodendrocyte generation. In the vicinity of hemisectioned spinal cords, the gene knockdown led to a similar induction of oligodendroglial features; however, newly generated oligodendrocytes appeared to suffer more from the hostile environment. This study contributes to our understanding of mechanisms of adult oligodendrogenesis and glial heterogeneity and further reveals critical factors when considering aNSC mediated cell replacement in injury and disease.
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Affiliation(s)
- Felix Beyer
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Janusz Jadasz
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Iria Samper Agrelo
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Jessica Schira-Heinen
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Janos Groh
- Department of Neurology, Developmental Neurobiology, University Hospital Würzburg, Würzburg, Germany
| | - Anastasia Manousi
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Christine Bütermann
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Veronica Estrada
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Laura Reiche
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Martina Cantone
- Laboratory of Systems Tumor Immunology, Department of Dermatology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - Julio Vera
- Laboratory of Systems Tumor Immunology, Department of Dermatology, Universitätsklinikum Erlangen, Erlangen, Germany
| | - Francesca Viganò
- Physiological Genomics, Institute of Physiology, Ludwig-Maximilians Universität München, München, Germany
| | - Leda Dimou
- Physiological Genomics, Institute of Physiology, Ludwig-Maximilians Universität München, München, Germany
| | - Hans Werner Müller
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Hans-Peter Hartung
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Patrick Küry
- Department of Neurology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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