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Domingo-Muelas A, Duart-Abadia P, Morante-Redolat JM, Jordán-Pla A, Belenguer G, Fabra-Beser J, Paniagua-Herranz L, Pérez-Villalba A, Álvarez-Varela A, Barriga FM, Gil-Sanz C, Ortega F, Batlle E, Fariñas I. Post-transcriptional control of a stemness signature by RNA-binding protein MEX3A regulates murine adult neurogenesis. Nat Commun 2023; 14:373. [PMID: 36690670 PMCID: PMC9871011 DOI: 10.1038/s41467-023-36054-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 01/12/2023] [Indexed: 01/25/2023] Open
Abstract
Neural stem cells (NSCs) in the adult murine subependymal zone balance their self-renewal capacity and glial identity with the potential to generate neurons during the lifetime. Adult NSCs exhibit lineage priming via pro-neurogenic fate determinants. However, the protein levels of the neural fate determinants are not sufficient to drive direct differentiation of adult NSCs, which raises the question of how cells along the neurogenic lineage avoid different conflicting fate choices, such as self-renewal and differentiation. Here, we identify RNA-binding protein MEX3A as a post-transcriptional regulator of a set of stemness associated transcripts at critical transitions in the subependymal neurogenic lineage. MEX3A regulates a quiescence-related RNA signature in activated NSCs that is needed for their return to quiescence, playing a role in the long-term maintenance of the NSC pool. Furthermore, it is required for the repression of the same program at the onset of neuronal differentiation. Our data indicate that MEX3A is a pivotal regulator of adult murine neurogenesis acting as a translational remodeller.
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Grants
- EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council)
- Ministerio de Ciencia e Innovación (MICINN, Spain) - PID2020-119917RB-I00.
- Regional Government of Valencia | Conselleria d'Educació, Investigació, Cultura i Esport (Conselleria d'Educació, Investigació, Cultura i Esport de la Generalitat Valenciana)
- Ministerio de Ciencia e Innovación (MICINN, Spain) - PID2020-117937GB-I00, PID2020-119917RB-I00, PID 2019-109155RB-I00, PID2020-114227RB-I00, RyC-2015-19058, PRE2018-084838. Centro de Investigación Biomédica en Red Enfermedades Neurodegenerativas (CIBERNED, Spain) - MICINN- CB06/05/0086.
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Affiliation(s)
- Ana Domingo-Muelas
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain
| | - Pere Duart-Abadia
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain
| | - Jose Manuel Morante-Redolat
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain
| | - Antonio Jordán-Pla
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
| | - Germán Belenguer
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain
| | - Jaime Fabra-Beser
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
| | - Lucía Paniagua-Herranz
- Departamento de Bioquímica y Biología Molecular, Universidad Complutense de Madrid (UCM), Madrid, Spain
- Instituto Universitario de Investigación en Neuroquímica (IUIN), Madrid, Spain
- Instituto de Investigación Sanitaria San Carlos (IdISSC), Madrid, Spain
| | - Ana Pérez-Villalba
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain
| | - Adrián Álvarez-Varela
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Barcelona, Spain
| | - Francisco M Barriga
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Barcelona, Spain
| | - Cristina Gil-Sanz
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain
| | - Felipe Ortega
- Departamento de Bioquímica y Biología Molecular, Universidad Complutense de Madrid (UCM), Madrid, Spain
- Instituto Universitario de Investigación en Neuroquímica (IUIN), Madrid, Spain
- Instituto de Investigación Sanitaria San Carlos (IdISSC), Madrid, Spain
| | - Eduard Batlle
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Barcelona, Spain.
- ICREA, Barcelona, Spain.
| | - Isabel Fariñas
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universidad de Valencia, Valencia, Spain.
- Instituto de Biotecnología y Biomedicina (BIOTECMED), Universidad de Valencia, Valencia, Spain.
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Valencia, Spain.
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Arredondo SB, Valenzuela-Bezanilla D, Santibanez SH, Varela-Nallar L. Wnt signaling in the adult hippocampal neurogenic niche. Stem Cells 2022; 40:630-640. [PMID: 35446432 DOI: 10.1093/stmcls/sxac027] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/29/2022] [Indexed: 11/14/2022]
Abstract
The subgranular zone (SGZ) of the hippocampal dentate gyrus (DG) is a neurogenic niche of the adult brain that contains neural stem cells (NSCs) able to generate excitatory glutamatergic granule neurons, which integrate into the DG circuit and contribute to hippocampal plasticity, learning, and memory. Thus, endogenous NSCs could be harnessed for therapeutic purposes. In this context, it is critical to characterize the molecular mechanisms controlling the generation and functional integration of adult-born neurons. Adult hippocampal neurogenesis is tightly controlled by both cell-autonomous mechanisms and the interaction with the complex niche microenvironment, which harbors the NSCs and provides the signals to support their maintenance, activation, and differentiation. Among niche-derived factors, Wnt ligands play diverse roles. Wnts are secreted glycoproteins that bind to Frizzled receptors and co-receptors to trigger the Wnt signaling pathway. Here, we summarize the current knowledge about the roles of Wnts in the regulation of adult hippocampal neurogenesis. We discuss the possible contribution of the different niche cells to the regulation of local Wnt signaling activity, and how Wnts derived from different cell types could induce differential effects. Finally, we discuss how the effects of Wnt signaling on hippocampal network activity might contribute to neurogenesis regulation. Although the evidence supports relevant roles for Wnt signaling in adult hippocampal neurogenesis, defining the cellular source and the mechanisms controlling secretion and diffusion of Wnts will be crucial to further understand Wnt signaling regulation of adult NSCs, and eventually, to propose this pathway as a therapeutic target to promote neurogenesis.
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Affiliation(s)
- Sebastian B Arredondo
- Institute of Biomedical Sciences, Faculty of Medicine and Faculty of Life Sciences, Universidad Andres Bello, Echaurren 183, 8370071, Santiago, Chile
| | - Daniela Valenzuela-Bezanilla
- Institute of Biomedical Sciences, Faculty of Medicine and Faculty of Life Sciences, Universidad Andres Bello, Echaurren 183, 8370071, Santiago, Chile
| | - Sebastian H Santibanez
- Institute of Biomedical Sciences, Faculty of Medicine and Faculty of Life Sciences, Universidad Andres Bello, Echaurren 183, 8370071, Santiago, Chile
| | - Lorena Varela-Nallar
- Institute of Biomedical Sciences, Faculty of Medicine and Faculty of Life Sciences, Universidad Andres Bello, Echaurren 183, 8370071, Santiago, Chile
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Expression of Doublecortin, Glial Fibrillar Acidic Protein, and Vimentin in the Intact Subpallium and after Traumatic Injury to the Pallium in Juvenile Salmon, Oncorhynchus masou. Int J Mol Sci 2022; 23:ijms23031334. [PMID: 35163257 PMCID: PMC8836249 DOI: 10.3390/ijms23031334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/17/2022] [Accepted: 01/22/2022] [Indexed: 02/04/2023] Open
Abstract
Fetalization associated with a delay in development and the preservation of the features of the embryonic structure of the brain dominates the ontogeny of salmonids. The aim of the present study was to comparatively analyze the distribution of the glial-type aNSC markers such as vimentin and glial fibrillar acidic protein (GFAP) and the migratory neuronal precursors such as doublecortin in the telencephalon subpallium of juvenile masu salmon, Oncorhynchus masou, in normal conditions and at 1 week after an injury to the dorsal pallium. Immunohistochemical labeling of vimentin, GFAP, and doublecortin in the pallium of intact juvenile masu salmon revealed single cells with similar morphologies corresponding to a persistent pool of neuronal and/or glial progenitors. The study of the posttraumatic process showed the presence of intensely GFAP-labeled cells of the neuroepithelial type that form reactive neurogenic zones in all areas of the subpallial zone of juvenile masu salmon. A comparative analysis of the distribution of radial glia in the dorsal, ventral, and lateral zones of the subpallium showed a maximum concentration of cells in the dorsal part of subpallium (VD) and a minimum concentration in the lateral part of subpallium VL. An essential feature of posttraumatic immunolabeling in the masu salmon subpallium is the GFAP distribution patterns that are granular intracellular in the apical periventricular zone (PVZ) and fibrillar extracellular in the subventricular (SVZ) and parenchymal zones (PZ). In contrast to those in intact animals, most of the GFAP+ granules and constitutive neurogenic niches in injured fish were localized in the basal part of the PVZ. With the traumatic injury to the subpallium, the number of Vim+ cells in the lateral and ventral regions significantly increased. At 1 week post-injury, the total immunolabeling of vimentin cells in the PVZ was replaced by the granular pattern of Vim immunodistribution spreading from the PVZ to the SVZ and deeper parenchymal layers of the brain in all areas of the subpallium. A significant increase in the number of DC+ cells was observed also in all areas of the subpallium. The number of cells increased both in the PVZ and in the SVZ, as well as in the deeper PZ. Thus, at 1 week after the injury to the dorsal pallium, the number of DC, Vim, and GFAP expressing cells of the neuroepithelial type in the subpallium of juvenile masu salmon increased, and additionally GFAP+ radial glia appeared in VD, which was absent from intact animals.
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Machado-Santos AR, Loureiro-Campos E, Patrício P, Araújo B, Alves ND, Mateus-Pinheiro A, Correia JS, Morais M, Bessa JM, Sousa N, Rodrigues AJ, Oliveira JF, Pinto L. Beyond New Neurons in the Adult Hippocampus: Imipramine Acts as a Pro-Astrogliogenic Factor and Rescues Cognitive Impairments Induced by Stress Exposure. Cells 2022; 11:cells11030390. [PMID: 35159199 PMCID: PMC8834148 DOI: 10.3390/cells11030390] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/13/2022] [Accepted: 01/21/2022] [Indexed: 02/06/2023] Open
Abstract
Depression is a prevalent, socially burdensome disease. Different studies have demonstrated the important role of astrocytes in the pathophysiology of depression as modulators of neurotransmission and neurovascular coupling. This is evidenced by astrocyte impairments observed in brains of depressed patients and the appearance of depressive-like behaviors upon astrocytic dysfunctions in animal models. However, little is known about the importance of de novo generated astrocytes in the mammalian brain and in particular its possible involvement in the precipitation of depression and in the therapeutic actions of current antidepressants (ADs). Therefore, we studied the modulation of astrocytes and adult astrogliogenesis in the hippocampal dentate gyrus (DG) of rats exposed to an unpredictable chronic mild stress (uCMS) protocol, untreated and treated for two weeks with antidepressants—fluoxetine and imipramine. Our results show that adult astrogliogenesis in the DG is modulated by stress and imipramine. This study reveals that distinct classes of ADs impact differently in the astrogliogenic process, showing different cellular mechanisms relevant to the recovery from behavioral deficits induced by chronic stress exposure. As such, in addition to those resident, the newborn astrocytes in the hippocampal DG might also be promising therapeutic targets for future therapies in the neuropsychiatric field.
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Affiliation(s)
- Ana R Machado-Santos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Eduardo Loureiro-Campos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Patrícia Patrício
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Bruna Araújo
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno Dinis Alves
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - António Mateus-Pinheiro
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana Sofia Correia
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Mónica Morais
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João M Bessa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Ana J Rodrigues
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João Filipe Oliveira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
- IPCA-EST-2Ai, Polytechnic Institute of Cávado and Ave, Applied Artificial Intelligence Laboratory, Campus of IPCA, 4750-810 Barcelos, Portugal
| | - Luísa Pinto
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
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Martins-Macedo J, Salgado AJ, Gomes ED, Pinto L. Adult brain cytogenesis in the context of mood disorders: From neurogenesis to the emergent role of gliogenesis. Neurosci Biobehav Rev 2021; 131:411-428. [PMID: 34555383 DOI: 10.1016/j.neubiorev.2021.09.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 09/06/2021] [Accepted: 09/16/2021] [Indexed: 12/18/2022]
Abstract
Psychiatric disorders severely impact patients' lives. Motivational, cognitive and emotional deficits are the most common symptoms observed in these patients and no effective treatment is still available, either due to the adverse side effects or the low rate of efficacy of currently available drugs. Neurogenesis recovery has been one important focus in the treatment of psychiatric disorders, which undeniably contributes to the therapeutic action of antidepressants. However, glial plasticity is emerging as a new strategy to explore the deficits observed in mood disorders and the efficacy of therapeutic interventions. Thus, it is crucial to understand the mechanisms behind glio- and neurogenesis to better define treatments and preventive therapies, once adult cytogenesis is of pivotal importance to cognitive and emotional components of behavior, both in healthy and pathological contexts, including in psychiatric disorders. Here, we review the concepts and history of neuro- and gliogenesis, providing as well a reflection on the functional importance of cytogenesis in the context of disease.
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Affiliation(s)
- Joana Martins-Macedo
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - António J Salgado
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Eduardo D Gomes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Luísa Pinto
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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Olivos-Cisneros L, Ramírez-Santos J, Gutiérrez-Ospina G. Proliferation rate and differentiation potential are independent during the transition from neurogenesis to gliogenesis in the mouse embryonic spinal cord. IBRO Neurosci Rep 2021; 10:75-82. [PMID: 33842913 PMCID: PMC8019975 DOI: 10.1016/j.ibneur.2020.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 11/25/2020] [Indexed: 11/18/2022] Open
Abstract
Neural stem cells (NSC) restrict their differentiation potential as the central nervous system develops. Experimental evidence suggests that the mechanisms governing the transition from the neurogenic to the gliogenic phase irreversibly affect the ability of NSC to generate neurons. Cell cycle regulation has been associated with cell fate in different models. In this work, we assessed the temporal correlation between the loss of the neurogenic potential and cell cycle lengthening of NSC obtained from embryonic mouse spinal cords, during the transition of the neurogenic to the gliogenic phase, using neurospheres. We also used the cell cycle inhibitor Olomoucine to increase cell cycle length by decreasing the proliferation rate. Our results show that neurospheres obtained from a neurogenic stage give rise mostly to neurons, whereas those obtained from later stages produce preferentially glial cells. During the transition from neurogenesis to gliogenesis, the proliferation rate dropped, and the cell cycle length increased 1.5 folds, as monitored by DNA BrdU incorporation. Interestingly, Olomoucine-treated neurogenic-neurospheres display a reduced proliferation rate and preserve their neurogenic potential. Our results suggest that the mechanisms that restrict the differentiation potential of NSC are independent of the proliferation control. Neurosphere cultured, spinal cord NSC preserve their differentiation potential. Neurogenic NSC divide faster than those giving rise to glial cells. Cell cycle inhibitors increase in NSC transitioning from the neurogenic to the gliogenic phase. Artificial cell cycle lengthening does not affect the differentiation potential of neurogenic NSC.
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Affiliation(s)
- Leonora Olivos-Cisneros
- Programa de Doctorado en Ciencias Biomédicas, Universidad Nacional Autónoma de México, 04510, Mexico
- Laboratorio de Biología de Sistemas, Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
- Corresponding author at: Programa de Doctorado en Ciencias Biomédicas, Universidad Nacional Autónoma de México, 04510, Mexico.
| | - Jesús Ramírez-Santos
- Laboratorio de Biología de Sistemas, Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
| | - Gabriel Gutiérrez-Ospina
- Laboratorio de Biología de Sistemas, Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
- Corresponding author.
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Zhao Y, Liu H, Zhang Q, Zhang Y. The functions of long non-coding RNAs in neural stem cell proliferation and differentiation. Cell Biosci 2020; 10:74. [PMID: 32514332 PMCID: PMC7260844 DOI: 10.1186/s13578-020-00435-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/23/2020] [Indexed: 02/06/2023] Open
Abstract
The capacities for neural stem cells (NSCs) self-renewal with differentiation are need to be precisely regulated for ensuring brain development and homeostasis. Recently, increasing number of studies have highlighted that long non-coding RNAs (lncRNAs) are associated with NSC fate determination during brain development stages. LncRNAs are a class of non-coding RNAs more than 200 nucleotides without protein-coding potential and function as novel critical regulators in multiple biological processes. However, the correlation between lncRNAs and NSC fate decision still need to be explored in-depth. In this review, we will summarize the roles and molecular mechanisms of lncRNAs focusing on NSCs self-renewal, neurogenesis and gliogenesis over the course of neural development, still more, dysregulation of lncRNAs in all stage of neural development have closely relationship with development disorders or glioma. In brief, lncRNAs may be explored as effective modulators in NSCs related neural development and novel biomarkers for diagnosis and prognosis of neurological disorders in the future.
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Affiliation(s)
- Yanfang Zhao
- Institute of Biomedical Research, Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School for Life Science, Shandong University of Technology, Zibo, China
| | - Hongliang Liu
- Institute of Biomedical Research, Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School for Life Science, Shandong University of Technology, Zibo, China
| | - Qili Zhang
- Institute of Biomedical Research, Shandong Provincial Research Center for Bioinformatic Engineering and Technique, Zibo Key Laboratory of New Drug Development of Neurodegenerative Diseases, School for Life Science, Shandong University of Technology, Zibo, China
| | - Yuan Zhang
- Institute for Translational Medicine, Qingdao University, Qingdao, China
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Pushchina EV, Zharikova EI, Varaksin AA, Prudnikov IM, Tsyvkin VN. Proliferation, Adult Neuronal Stem Cells and Cells Migration in Pallium during Constitutive Neurogenesis and after Traumatic Injury of Telencephalon of Juvenile Masu Salmon, Oncorhynchus masou. Brain Sci 2020; 10:brainsci10040222. [PMID: 32276413 PMCID: PMC7226367 DOI: 10.3390/brainsci10040222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/31/2020] [Accepted: 04/06/2020] [Indexed: 12/11/2022] Open
Abstract
A study of the lateral pallium in zebrafish and the visual tectum of the medaka revealed a population of adult neuroepithelial (NE) cells supported from the early stage of development to various postembryonic stages of ontogenesis. These data emphasize the importance of non-radial glial stem cells in the neurogenesis of adult animals, in particular fish. However, the distribution, cell cycle features, and molecular markers of NE cells and glial progenitors in fish are still poorly understood at the postembryonic stages of ontogenesis. Fetalization predominates in the ontogenetic development of salmon fish, which is associated with a delay in development and preservation of the features of the embryonic structure of the brain during the first year of life. In the present work, we studied the features of proliferation and the migration of neuronal precursors in the pallial proliferative zone of juvenile Oncorhynchus masou. The aim of the study is a comparative analysis of the distribution of glial-type aNSCs markers, such as vimentin and glial fibrillar acid protein GFAP, as well as the proliferation marker BrdU and migratory neuronal precursor doublecortin, in the pallial zone of the intact telencephalon in juvenile O. masou normal and after mechanical injury. The immunohistochemical IHC labeling with antibodies to vimentin, GFAP and doublecortin in the pallium of intact fish revealed single, small, round and oval immunopositive cells, that correspond to a persistent pool of neuronal and/or glial progenitors. After the injury, heterogeneous cell clusters, radial glia processes, single and small intensely labeled GFAP+ cells in the parenchyma of Dd and lateral part of pallium (Dl) appeared, corresponding to reactive neurogenic niches containing glial aNSCs. A multifold increase in the pool of Vim+ neuronal precursor cells (NPCs) resulting from the injury was observed. Vim+ cells of the neuroepithelial type in Dd and Dm and cells of the glial type were identified in Dl after the injury. Doublecortine (Dc) immunolabeling after the injury revealed the radial migration of neuroblasts into Dm from the neurogenic zone of the pallium. The appearance of intensely labeled Dc+ cells in the brain parenchyma might indicate the activation of resident aNSCs as a consequence of the traumatic process.
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Affiliation(s)
- Evgeniya V. Pushchina
- Zhirmunsky National Scientific Center of Marine Biology, Far East Branch, Russian Academy of Sciences, 690041 Vladivostok, Russia; (E.I.Z.); (A.A.V.)
- Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, 01024 Kyiv, Ukraine; (I.M.P.); (V.N.T.)
- Correspondence: ; Tel.: +79-149680177
| | - Eva I. Zharikova
- Zhirmunsky National Scientific Center of Marine Biology, Far East Branch, Russian Academy of Sciences, 690041 Vladivostok, Russia; (E.I.Z.); (A.A.V.)
| | - Anatoly A. Varaksin
- Zhirmunsky National Scientific Center of Marine Biology, Far East Branch, Russian Academy of Sciences, 690041 Vladivostok, Russia; (E.I.Z.); (A.A.V.)
| | - Igor M. Prudnikov
- Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, 01024 Kyiv, Ukraine; (I.M.P.); (V.N.T.)
| | - Vladimir N. Tsyvkin
- Bogomoletz Institute of Physiology, National Academy of Sciences of Ukraine, 01024 Kyiv, Ukraine; (I.M.P.); (V.N.T.)
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9
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Lepko T, Pusch M, Müller T, Schulte D, Ehses J, Kiebler M, Hasler J, Huttner HB, Vandenbroucke RE, Vandendriessche C, Modic M, Martin‐Villalba A, Zhao S, LLorens‐Bobadilla E, Schneider A, Fischer A, Breunig CT, Stricker SH, Götz M, Ninkovic J. Choroid plexus-derived miR-204 regulates the number of quiescent neural stem cells in the adult brain. EMBO J 2019; 38:e100481. [PMID: 31304985 PMCID: PMC6717894 DOI: 10.15252/embj.2018100481] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 06/07/2019] [Accepted: 06/13/2019] [Indexed: 12/12/2022] Open
Abstract
Regulation of adult neural stem cell (NSC) number is critical for lifelong neurogenesis. Here, we identified a post-transcriptional control mechanism, centered around the microRNA 204 (miR-204), to control the maintenance of quiescent (q)NSCs. miR-204 regulates a spectrum of transcripts involved in cell cycle regulation, neuronal migration, and differentiation in qNSCs. Importantly, inhibition of miR-204 function reduced the number of qNSCs in the subependymal zone (SEZ) by inducing pre-mature activation and differentiation of NSCs without changing their neurogenic potential. Strikingly, we identified the choroid plexus of the mouse lateral ventricle as the major source of miR-204 that is released into the cerebrospinal fluid to control number of NSCs within the SEZ. Taken together, our results describe a novel mechanism to maintain adult somatic stem cells by a niche-specific miRNA repressing activation and differentiation of stem cells.
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Affiliation(s)
- Tjasa Lepko
- Institute of Stem Cell ResearchHelmholtz Center MunichNeuherbergGermany
- Graduate School of Systemic NeurosciencesLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
- Physiological GenomicsBiomedical CenterMedical FacultyLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
| | - Melanie Pusch
- Institute of Stem Cell ResearchHelmholtz Center MunichNeuherbergGermany
| | - Tamara Müller
- Institute of Neurology (Edinger Institute)University HospitalGoethe University FrankfurtFrankfurtGermany
| | - Dorothea Schulte
- Institute of Neurology (Edinger Institute)University HospitalGoethe University FrankfurtFrankfurtGermany
| | - Janina Ehses
- Department for Cell Biology and AnatomyBiomedical CenterLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
| | - Michael Kiebler
- Department for Cell Biology and AnatomyBiomedical CenterLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
| | - Julia Hasler
- Institute of Stem Cell ResearchHelmholtz Center MunichNeuherbergGermany
| | - Hagen B Huttner
- Department of NeurologyUniversity Hospital ErlangenFriedrich‐Alexander‐University Erlangen‐NürnbergErlangenGermany
| | - Roosmarijn E Vandenbroucke
- VIB Center for Inflammation Research, VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
- Ghent Gut Inflammation Group (GGIG)Ghent UniversityGhentBelgium
| | - Charysse Vandendriessche
- VIB Center for Inflammation Research, VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
- Ghent Gut Inflammation Group (GGIG)Ghent UniversityGhentBelgium
| | - Miha Modic
- The Francis Crick InstituteLondonUK
- Department for Neuromuscular DiseasesUCL Queen Square Institute of NeurologyLondonUK
| | | | - Sheng Zhao
- Molecular NeurobiologyGerman Cancer Research Center (DKFZ)HeidelbergGermany
| | | | - Anja Schneider
- Translational Dementia Research GroupGerman Center for Neurodegenerative Diseases (DZNE) BonnBonnGermany
- Department of Neurodegenerative Diseases and Geriatric PsychiatryUniversity Clinic BonnBonnGermany
| | - Andre Fischer
- Department for Epigenetics and Systems MedicineGerman Center for Neurodegenerative Diseases (DZNE) GöttingenGöttingenGermany
| | - Christopher T Breunig
- MCN Junior Research GroupMunich Center for NeurosciencesBioMedical CenterLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
- Epigenetic EngineeringHelmholtz Zentrum MünchenNeuherbergGermany
| | - Stefan H Stricker
- MCN Junior Research GroupMunich Center for NeurosciencesBioMedical CenterLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
- Epigenetic EngineeringHelmholtz Zentrum MünchenNeuherbergGermany
| | - Magdalena Götz
- Institute of Stem Cell ResearchHelmholtz Center MunichNeuherbergGermany
- Physiological GenomicsBiomedical CenterMedical FacultyLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
- Munich Cluster for Systems Neurology (SyNergy)MunichGermany
| | - Jovica Ninkovic
- Institute of Stem Cell ResearchHelmholtz Center MunichNeuherbergGermany
- Physiological GenomicsBiomedical CenterMedical FacultyLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
- Department for Cell Biology and AnatomyBiomedical CenterLudwig‐Maximilians UniversitaetPlanegg‐MartinsriedGermany
- Munich Cluster for Systems Neurology (SyNergy)MunichGermany
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10
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Sirerol-Piquer MS, Belenguer G, Morante-Redolat JM, Duart-Abadia P, Perez-Villalba A, Fariñas I. Physiological Interactions between Microglia and Neural Stem Cells in the Adult Subependymal Niche. Neuroscience 2019; 405:77-91. [PMID: 30677487 DOI: 10.1016/j.neuroscience.2019.01.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 01/07/2019] [Accepted: 01/10/2019] [Indexed: 12/31/2022]
Abstract
Microglia are the prototypical innate immune cells of the central nervous system. They constitute a unique type of tissue-resident mononuclear phagocytes which act as glial cells. Elegant experiments in the last few years have revealed the origin, extraordinary molecular diversity, and phenotypic plasticity of these cells and how their potential relates to both immune and non-immune actions in the normal and diseased brain. Microglial cells originate in the yolk sac and colonize the brain during embryogenesis, playing a role in neural development and later in adult brain function. Neurogenesis continues after birth in discrete areas of the mammalian brain sustained by the postnatal persistence of neural stem cells in specific neurogenic niches. Recent data indicate that microglial cells are distinct cellular elements of these neurogenic niches where they regulate different aspects of stem cell biology. Interestingly, microglial and neural stem cells are specified very early in fetal development and persist as self-renewing populations throughout life, suggesting potential life-long interactions between them. We aim at reviewing these interactions in one neurogenic niche, the subependymal zone.
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Affiliation(s)
- Mª Salomé Sirerol-Piquer
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Departamento de Biología Celular, Biología Funcional y Antropología Física and Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100 Burjassot, Spain
| | - Germán Belenguer
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Departamento de Biología Celular, Biología Funcional y Antropología Física and Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100 Burjassot, Spain
| | - José Manuel Morante-Redolat
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Departamento de Biología Celular, Biología Funcional y Antropología Física and Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100 Burjassot, Spain
| | - Pere Duart-Abadia
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Departamento de Biología Celular, Biología Funcional y Antropología Física and Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100 Burjassot, Spain
| | - Ana Perez-Villalba
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Departamento de Biología Celular, Biología Funcional y Antropología Física and Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100 Burjassot, Spain
| | - Isabel Fariñas
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Departamento de Biología Celular, Biología Funcional y Antropología Física and Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universidad de Valencia, 46100 Burjassot, Spain.
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11
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Ninkovic J, Götz M. Understanding direct neuronal reprogramming-from pioneer factors to 3D chromatin. Curr Opin Genet Dev 2018; 52:65-69. [PMID: 29909355 DOI: 10.1016/j.gde.2018.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/19/2018] [Accepted: 05/29/2018] [Indexed: 01/10/2023]
Abstract
Cell replacement therapies aim at reestablishment of neuronal circuits after brain injury, stroke or neurodegeneration. Recently, direct reprogramming of resident glial cells into the affected neuronal subtypes has become a feasible and promising option for central nervous system regeneration. Direct reprogramming relies on the implementation of a new transcriptional program defining the desired neuronal identity in fully differentiated glial cells implying the more or less complete down-regulation of the program for the former identity of the glial cell. Despite the enormous progress achieved in this regard with highly efficient in vivo reprogramming after injury, a number of hurdles still need to be resolved. One way to further improve direct neuronal reprogramming is to understand the molecular hurdles which we discuss with the focus on chromatin states of the starting versus the reprogrammed cells.
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Affiliation(s)
- Jovica Ninkovic
- Institute of Stem Cell Research, Helmholtz Center Munich, Germany; Physiological Genomics, Biomedical Center, University of Munich, Germany; Department for Cell Biology and Anatomy, Biomedical Center, University of Munich, Germany
| | - Magdalena Götz
- Institute of Stem Cell Research, Helmholtz Center Munich, Germany; Physiological Genomics, Biomedical Center, University of Munich, Germany; Munich Cluster for Systems Neurology SYNERGY, LMU, Munich, Germany.
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12
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Azim K, Akkermann R, Cantone M, Vera J, Jadasz JJ, Küry P. Transcriptional Profiling of Ligand Expression in Cell Specific Populations of the Adult Mouse Forebrain That Regulates Neurogenesis. Front Neurosci 2018; 12:220. [PMID: 29740265 PMCID: PMC5925963 DOI: 10.3389/fnins.2018.00220] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/20/2018] [Indexed: 11/16/2022] Open
Abstract
In the adult central nervous system (CNS), the subventricular zone (SVZ) of the forebrain is the largest and most active source of neural stem cells (NSCs) that generates mainly neurons and few glial cells lifelong. A large body of evidence has shed light on the distinct families of signaling ligands (i.e., morphogens, growth factors, secreted molecules that alter signaling pathways) in regulating NSC biology. However, most of the research has focused on the mRNA expression of individual or few signaling ligands and their pathway components in specific cell types of the CNS in the context of neurogenesis. A single unifying study that underlines the expression of such molecules comprehensively in different cell types in spatial contexts has not yet been reported. By using whole genome transcriptome datasets of individual purified cell specific populations of the adult CNS, the SVZ niche, NSCs, glial cells, choroid plexus, and performing a bioinformatic meta-analysis of signaling ligands, their expression in the forebrain was uncovered. Therein, we report that a large plethora of ligands are abundantly expressed in the SVZ niche, largely from the vasculature than from other sources that may regulate neurogenesis. Intriguingly, this sort of analysis revealed a number of ligands with unknown functions in neurogenesis contexts that warrants further investigations. This study therefore serves as a framework for investigators in the field for understanding the expression patterns of signaling ligands and pathways regulating neurogenesis.
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Affiliation(s)
- Kasum Azim
- Department of Neurology, Neuroregeneration, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Rainer Akkermann
- Department of Neurology, Neuroregeneration, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Martina Cantone
- Laboratory of Systems Tumor Immunology, Department of Dermatology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Julio Vera
- Laboratory of Systems Tumor Immunology, Department of Dermatology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Janusz J. Jadasz
- Department of Neurology, Neuroregeneration, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Patrick Küry
- Department of Neurology, Neuroregeneration, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
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13
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Stricker SH, Götz M. DNA-Methylation: Master or Slave of Neural Fate Decisions? Front Neurosci 2018; 12:5. [PMID: 29449798 PMCID: PMC5799221 DOI: 10.3389/fnins.2018.00005] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 01/04/2018] [Indexed: 01/05/2023] Open
Abstract
The pristine formation of complex organs depends on sharp temporal and spatial control of gene expression. Therefore, epigenetic mechanisms have been frequently attributed a central role in controlling cell fate determination. A prime example for this is the first discovered and still most studied epigenetic mark, DNA methylation, and the development of the most complex mammalian organ, the brain. Recently, the field of epigenetics has advanced significantly: new DNA modifications were discovered, epigenomic profiling became widely accessible, and methods for targeted epigenomic manipulation have been developed. Thus, it is time to challenge established models of epigenetic gene regulation. Here, we review the current state of knowledge about DNA modifications, their epigenomic distribution, and their regulatory role. We will summarize the evidence suggesting they possess crucial roles in neurogenesis and discuss whether this likely includes lineage choice regulation or rather effects on differentiation. Finally, we will attempt an outlook on how questions, which remain unresolved, could be answered soon.
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Affiliation(s)
- Stefan H Stricker
- MCN Junior Research Group, Munich Center for Neurosciences, Ludwig-Maximilian-Universität, Munich, Germany.,Physiological Genomics, BioMedical Center, Munich, Germany.,German Research Center for Environmental Health, Ingolstädter Landstrasse 1, Germany and Biomedical Center, Institute of Stem Cell Research, Helmholtz Zentrum, Ludwig-Maximilian-Universität, Munich, Germany
| | - Magdalena Götz
- Physiological Genomics, BioMedical Center, Munich, Germany.,German Research Center for Environmental Health, Ingolstädter Landstrasse 1, Germany and Biomedical Center, Institute of Stem Cell Research, Helmholtz Zentrum, Ludwig-Maximilian-Universität, Munich, Germany.,German Excellence Cluster of Systems Neurology, Munich, Germany
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14
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Artegiani B, Lyubimova A, Muraro M, van Es JH, van Oudenaarden A, Clevers H. A Single-Cell RNA Sequencing Study Reveals Cellular and Molecular Dynamics of the Hippocampal Neurogenic Niche. Cell Rep 2017; 21:3271-3284. [DOI: 10.1016/j.celrep.2017.11.050] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 10/09/2017] [Accepted: 11/14/2017] [Indexed: 12/12/2022] Open
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15
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Falk S, Götz M. Glial control of neurogenesis. Curr Opin Neurobiol 2017; 47:188-195. [PMID: 29145015 DOI: 10.1016/j.conb.2017.10.025] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 10/20/2017] [Accepted: 10/24/2017] [Indexed: 12/27/2022]
Abstract
Glial cells are central components of all neurogenic niches in the embryonic as well as in the adult central nervous system. While neural stem cells (NSCs) themselves exhibit glial features the behavior of NSCs is also strongly influenced by niche glial cells. Recently, studies have begun to uncover a large variety of glial cell-extrinsic as well as intrinsic factors that play crucial roles in the control of NSCs and the regulation of the cellular output from the neurogenic niches. In this review, we focus on mechanisms underlying the formation of adult NSCs by embryonic radial glia cells, discuss the influence of niche glia cells on adult NSCs and examine how the neurogenic potential of glial cells is controlled.
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Affiliation(s)
- Sven Falk
- Physiological Genomics, Biomedical Center, Ludwig Maximilians University Munich, 82152 Planegg/Munich, Germany; Institute for Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany.
| | - Magdalena Götz
- Physiological Genomics, Biomedical Center, Ludwig Maximilians University Munich, 82152 Planegg/Munich, Germany; Institute for Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany; SYNERGY, Excellence Cluster of Systems Neurology, Biomedical Center, Ludwig-Maximilian University Munich, 82152 Planegg/Munich, Germany.
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16
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Grade S, Götz M. Neuronal replacement therapy: previous achievements and challenges ahead. NPJ Regen Med 2017; 2:29. [PMID: 29302363 PMCID: PMC5677983 DOI: 10.1038/s41536-017-0033-0] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 09/22/2017] [Accepted: 09/25/2017] [Indexed: 12/26/2022] Open
Abstract
Lifelong neurogenesis and incorporation of newborn neurons into mature neuronal circuits operates in specialized niches of the mammalian brain and serves as role model for neuronal replacement strategies. However, to which extent can the remaining brain parenchyma, which never incorporates new neurons during the adulthood, be as plastic and readily accommodate neurons in networks that suffered neuronal loss due to injury or neurological disease? Which microenvironment is permissive for neuronal replacement and synaptic integration and which cells perform best? Can lost function be restored and how adequate is the participation in the pre-existing circuitry? Could aberrant connections cause malfunction especially in networks dominated by excitatory neurons, such as the cerebral cortex? These questions show how important connectivity and circuitry aspects are for regenerative medicine, which is the focus of this review. We will discuss the impressive advances in neuronal replacement strategies and success from exogenous as well as endogenous cell sources. Both have seen key novel technologies, like the groundbreaking discovery of induced pluripotent stem cells and direct neuronal reprogramming, offering alternatives to the transplantation of fetal neurons, and both herald great expectations. For these to become reality, neuronal circuitry analysis is key now. As our understanding of neuronal circuits increases, neuronal replacement therapy should fulfill those prerequisites in network structure and function, in brain-wide input and output. Now is the time to incorporate neural circuitry research into regenerative medicine if we ever want to truly repair brain injury.
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Affiliation(s)
- Sofia Grade
- Physiological Genomics, Biomedical Center, Ludwig-Maximilians University Munich, 82152 Planegg-Martinsried, Germany
- Institute of Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany
| | - Magdalena Götz
- Physiological Genomics, Biomedical Center, Ludwig-Maximilians University Munich, 82152 Planegg-Martinsried, Germany
- Institute of Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany
- SYNERGY, Excellence Cluster of Systems Neurology, Biomedical Center, Ludwig-Maximilians University Munich, 82152 Planegg-Martinsried, Germany
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17
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Falk S, Bugeon S, Ninkovic J, Pilz GA, Postiglione MP, Cremer H, Knoblich JA, Götz M. Time-Specific Effects of Spindle Positioning on Embryonic Progenitor Pool Composition and Adult Neural Stem Cell Seeding. Neuron 2017; 93:777-791.e3. [PMID: 28231465 PMCID: PMC5338691 DOI: 10.1016/j.neuron.2017.02.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 11/12/2016] [Accepted: 01/06/2017] [Indexed: 12/27/2022]
Abstract
The developmental mechanisms regulating the number of adult neural stem cells (aNSCs) are largely unknown. Here we show that the cleavage plane orientation in murine embryonic radial glia cells (RGCs) regulates the number of aNSCs in the lateral ganglionic eminence (LGE). Randomizing spindle orientation in RGCs by overexpression of Insc or a dominant-negative form of Lgn (dnLgn) reduces the frequency of self-renewing asymmetric divisions while favoring symmetric divisions generating two SNPs. Importantly, these changes during embryonic development result in reduced seeding of aNSCs. Interestingly, no effects on aNSC numbers were observed when Insc was overexpressed in postnatal RGCs or aNSCs. These data suggest a new mechanism for controlling aNSC numbers and show that the role of spindle orientation during brain development is highly time and region dependent. Randomization of the spindle orientation changes the progenitor pool composition Overexpression of Insc or dnLgn reduces asymmetric self-renewing division of aRGCs The change in embryonic progenitor pool leads to reduced seeding of adult NSCs Insc influences the seeding of adult NSCs in a narrow developmental time window
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Affiliation(s)
- Sven Falk
- Institute for Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany; Physiological Genomics, Biomedical Center, Ludwig-Maximilian University Munich, 82152 Planegg/Munich, Germany
| | - Stéphane Bugeon
- Aix-Marseille Université, Centre National de la Recherche Scientifique, IBDM, UMR7288, 13284 Marseille, France
| | - Jovica Ninkovic
- Institute for Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany; Physiological Genomics, Biomedical Center, Ludwig-Maximilian University Munich, 82152 Planegg/Munich, Germany
| | - Gregor-Alexander Pilz
- Institute for Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany
| | - Maria Pia Postiglione
- Institute of Molecular Biotechnology of the Austrian Academy of Science (IMBA), 1030 Vienna, Austria
| | - Harold Cremer
- Aix-Marseille Université, Centre National de la Recherche Scientifique, IBDM, UMR7288, 13284 Marseille, France
| | - Jürgen A Knoblich
- Institute of Molecular Biotechnology of the Austrian Academy of Science (IMBA), 1030 Vienna, Austria
| | - Magdalena Götz
- Institute for Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany; Physiological Genomics, Biomedical Center, Ludwig-Maximilian University Munich, 82152 Planegg/Munich, Germany; SYNERGY, Excellence Cluster of Systems Neurology, Biomedical Center, Ludwig-Maximilian University Munich, 82152 Planegg/Munich, Germany.
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18
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Martín-Ibáñez R, Pardo M, Giralt A, Miguez A, Guardia I, Marion-Poll L, Herranz C, Esgleas M, Garcia-Díaz Barriga G, Edel MJ, Vicario-Abejón C, Alberch J, Girault JA, Chan S, Kastner P, Canals JM. Helios expression coordinates the development of a subset of striatopallidal medium spiny neurons. Development 2017; 144:1566-1577. [PMID: 28289129 PMCID: PMC5399659 DOI: 10.1242/dev.138248] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 03/03/2017] [Indexed: 12/25/2022]
Abstract
Here, we unravel the mechanism of action of the Ikaros family zinc finger protein Helios (He) during the development of striatal medium spiny neurons (MSNs). He regulates the second wave of striatal neurogenesis involved in the generation of striatopallidal neurons, which express dopamine 2 receptor and enkephalin. To exert this effect, He is expressed in neural progenitor cells (NPCs) keeping them in the G1/G0 phase of the cell cycle. Thus, a lack of He results in an increase of S-phase entry and S-phase length of NPCs, which in turn impairs striatal neurogenesis and produces an accumulation of the number of cycling NPCs in the germinal zone (GZ), which end up dying at postnatal stages. Therefore, He−/− mice show a reduction in the number of dorso-medial striatal MSNs in the adult that produces deficits in motor skills acquisition. In addition, overexpression of He in NPCs induces misexpression of DARPP-32 when transplanted in mouse striatum. These findings demonstrate that He is involved in the correct development of a subset of striatopallidal MSNs and reveal new cellular mechanisms for neuronal development. Summary: The transcription factor Helios regulates G1-S transition to promote neuronal differentiation of a striatopallidal neuronal subpopulation involved in motor skill acquisition.
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Affiliation(s)
- Raquel Martín-Ibáñez
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Research and Development Unit, Production and Validation Center of Advanced Therapies (Creatio), Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Mónica Pardo
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Albert Giralt
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Pathophysiology of Neurodegenerative Diseases Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Andrés Miguez
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Inés Guardia
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Lucile Marion-Poll
- Inserm UMR-S839; Université Pierre et Marie Curie (UPMC, Paris 6), Sorbonne Universités; Institut du Fer à Moulin, 75005 Paris, France
| | - Cristina Herranz
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Research and Development Unit, Production and Validation Center of Advanced Therapies (Creatio), Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Miriam Esgleas
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Gerardo Garcia-Díaz Barriga
- Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Pathophysiology of Neurodegenerative Diseases Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Michael J Edel
- Control of Pluripotency Laboratory, Department of Biomedical Sciences, Faculty of Medicine and Health Science, University of Barcelona, 08036 Barcelona, Spain.,Victor Chang Cardiac Research Institute, Sydney, New South Wales, 2010 Australia.,School of Medicine and Pharmacology, Anatomy, Physiology and Human Biology, CCTRM, University of Western Australia, Western Australia, 6009 Australia
| | - Carlos Vicario-Abejón
- Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Departamento de Neurobiología Molecular, Celular y del Desarrollo, Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), 28002 Madrid, Spain
| | - Jordi Alberch
- Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Jean-Antoine Girault
- Inserm UMR-S839; Université Pierre et Marie Curie (UPMC, Paris 6), Sorbonne Universités; Institut du Fer à Moulin, 75005 Paris, France
| | - Susan Chan
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain
| | - Philippe Kastner
- Department of Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm U964, Centre National de la Recherche Scientifique (CNRS) UMR 7104, 67400 Illkirch-Graffenstaden, France.,Faculté de Médecine, Université de Strasbourg, 67081 Strasbourg, France
| | - Josep M Canals
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain .,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Research and Development Unit, Production and Validation Center of Advanced Therapies (Creatio), Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
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19
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Jones KS, Connor BJ. The Effect of Pro-Neurogenic Gene Expression on Adult Subventricular Zone Precursor Cell Recruitment and Fate Determination After Excitotoxic Brain Injury. J Stem Cells Regen Med 2016. [PMID: 27397999 PMCID: PMC4929891 DOI: 10.46582/jsrm.1201005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Despite the presence of on-going neurogenesis in the adult mammalian brain, neurons are generally not replaced after injury. Using a rodent model of excitotoxic cell loss and retroviral (RV) lineage tracing, we previously demonstrated transient recruitment of precursor cells from the subventricular zone (SVZ) into the lesioned striatum. In the current study we determined that these cells included migratory neuroblasts and oligodendrocyte precursor cells (OPC), with the predominant response from glial cells. We attempted to override this glial response by ectopic expression of the pro-neurogenic genes Pax6 or Dlx2 in the adult rat SVZ following quinolinic acid lesioning. RV-Dlx2 over-expression stimulated repair at a previously non-neurogenic time point by enhancing neuroblast recruitment and the percentage of cells that retained a neuronal fate within the lesioned area, compared to RV-GFP controls. RV-Pax6 expression was unsuccessful at inhibiting glial fate and intriguingly, increased OPC cell numbers with no change in neuronal recruitment. These findings suggest that gene choice is important when attempting to augment endogenous repair as the lesioned environment can overcome pro-neurogenic gene expression. Dlx2 over-expression however was able to partially overcome an anti-neuronal environment and therefore is a promising candidate for further study of striatal regeneration.
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Affiliation(s)
- Kathryn S Jones
- Centre for Brain Research, Department of Pharmacology and Clinical Pharmacology, School of Medical Science, Faculty of Medical and Health Sciences, University of Auckland
| | - Bronwen J Connor
- Centre for Brain Research, Department of Pharmacology and Clinical Pharmacology, School of Medical Science, Faculty of Medical and Health Sciences, University of Auckland
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20
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Forger NG, Strahan JA, Castillo-Ruiz A. Cellular and molecular mechanisms of sexual differentiation in the mammalian nervous system. Front Neuroendocrinol 2016; 40:67-86. [PMID: 26790970 PMCID: PMC4897775 DOI: 10.1016/j.yfrne.2016.01.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 12/31/2015] [Accepted: 01/09/2016] [Indexed: 01/16/2023]
Abstract
Neuroscientists are likely to discover new sex differences in the coming years, spurred by the National Institutes of Health initiative to include both sexes in preclinical studies. This review summarizes the current state of knowledge of the cellular and molecular mechanisms underlying sex differences in the mammalian nervous system, based primarily on work in rodents. Cellular mechanisms examined include neurogenesis, migration, the differentiation of neurochemical and morphological cell phenotype, and cell death. At the molecular level we discuss evolving roles for epigenetics, sex chromosome complement, the immune system, and newly identified cell signaling pathways. We review recent findings on the role of the environment, as well as genome-wide studies with some surprising results, causing us to re-think often-used models of sexual differentiation. We end by pointing to future directions, including an increased awareness of the important contributions of tissues outside of the nervous system to sexual differentiation of the brain.
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Affiliation(s)
- Nancy G Forger
- Neuroscience Institute, Georgia State University, Atlanta, GA 30303, United States.
| | - J Alex Strahan
- Neuroscience Institute, Georgia State University, Atlanta, GA 30303, United States.
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21
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Sammut M, Cook SJ, Nguyen KCQ, Felton T, Hall DH, Emmons SW, Poole RJ, Barrios A. Glia-derived neurons are required for sex-specific learning in C. elegans. Nature 2015; 526:385-390. [PMID: 26469050 PMCID: PMC4650210 DOI: 10.1038/nature15700] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Accepted: 09/10/2015] [Indexed: 12/14/2022]
Abstract
Sex differences in behaviour extend to cognitive-like processes such as learning, but the underlying dimorphisms in neural circuit development and organization that generate these behavioural differences are largely unknown. Here we define at the single-cell level-from development, through neural circuit connectivity, to function-the neural basis of a sex-specific learning in the nematode Caenorhabditis elegans. We show that sexual conditioning, a form of associative learning, requires a pair of male-specific interneurons whose progenitors are fully differentiated glia. These neurons are generated during sexual maturation and incorporated into pre-exisiting sex-shared circuits to couple chemotactic responses to reproductive priorities. Our findings reveal a general role for glia as neural progenitors across metazoan taxa and demonstrate that the addition of sex-specific neuron types to brain circuits during sexual maturation is an important mechanism for the generation of sexually dimorphic plasticity in learning.
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Affiliation(s)
- Michele Sammut
- Department of Cell and Developmental Biology, University College London, London, WC1E 6BT
| | - Steven J Cook
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Ken C Q Nguyen
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Terry Felton
- Department of Cell and Developmental Biology, University College London, London, WC1E 6BT
| | - David H Hall
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Scott W Emmons
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Richard J Poole
- Department of Cell and Developmental Biology, University College London, London, WC1E 6BT
| | - Arantza Barrios
- Department of Cell and Developmental Biology, University College London, London, WC1E 6BT
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22
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Latchney SE, Jiang Y, Petrik DP, Eisch AJ, Hsieh J. Inducible knockout of Mef2a, -c, and -d from nestin-expressing stem/progenitor cells and their progeny unexpectedly uncouples neurogenesis and dendritogenesis in vivo. FASEB J 2015; 29:5059-71. [PMID: 26286136 DOI: 10.1096/fj.15-275651] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 08/13/2015] [Indexed: 12/11/2022]
Abstract
Myocyte enhancer factor (Mef)-2 transcription factors are implicated in activity-dependent neuronal processes during development, but the role of MEF2 in neural stem/progenitor cells (NSPCs) in the adult brain is unknown. We used a transgenic mouse in which Mef2a, -c, and -d were inducibly deleted in adult nestin-expressing NSPCs and their progeny. Recombined cells in the hippocampal granule cell layer were visualized and quantified by yellow fluorescent protein (YFP) expression. In control mice, postmitotic neurons expressed Mef2a, -c, and -d, whereas type 1 stem cells and proliferating progenitors did not. Based on this expression, we hypothesized that Mef2a, -c, and -d deletion in adult nestin-expressing NSPCs and their progeny would result in fewer mature neurons. Control mice revealed an increase in YFP(+) neurons and dendrite formation over time. Contrary to our hypothesis, inducible Mef2 KO mice also displayed an increase in YFP(+) neurons over time-but with significantly stunted dendrites-suggesting an uncoupling of neuron survival and dendritogenesis. We also found non-cell-autonomous effects after Mef2a, -c, and -d deletion. These in vivo findings indicate a surprising functional role for Mef2a, -c, and -d in cell- and non-cell-autonomous control of adult hippocampal neurogenesis that is distinct from its role during development.
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Affiliation(s)
- Sarah E Latchney
- *Department of Psychiatry and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Yindi Jiang
- *Department of Psychiatry and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - David P Petrik
- *Department of Psychiatry and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Amelia J Eisch
- *Department of Psychiatry and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Jenny Hsieh
- *Department of Psychiatry and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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23
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Regional and stage-specific effects of prospectively purified vascular cells on the adult V-SVZ neural stem cell lineage. J Neurosci 2015; 35:4528-39. [PMID: 25788671 DOI: 10.1523/jneurosci.1188-14.2015] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Adult neural stem cells reside in specialized niches. In the ventricular-subventricular zone (V-SVZ), quiescent neural stem cells (qNSCs) become activated (aNSCs), and generate transit amplifying cells (TACs), which give rise to neuroblasts that migrate to the olfactory bulb. The vasculature is an important component of the adult neural stem cell niche, but whether vascular cells in neurogenic areas are intrinsically different from those elsewhere in the brain is unknown. Moreover, the contribution of pericytes to the neural stem cell niche has not been defined. Here, we describe a rapid FACS purification strategy to simultaneously isolate primary endothelial cells and pericytes from brain microregions of nontransgenic mice using CD31 and CD13 as surface markers. We compared the effect of purified vascular cells from a neurogenic (V-SVZ) and non-neurogenic brain region (cortex) on the V-SVZ stem cell lineage in vitro. Endothelial and pericyte diffusible signals from both regions differentially promote the proliferation and neuronal differentiation of qNSCs, aNSCs, and TACs. Unexpectedly, diffusible cortical signals had the most potent effects on V-SVZ proliferation and neurogenesis, highlighting the intrinsic capacity of non-neurogenic vasculature to support stem cell behavior. Finally, we identify PlGF-2 as an endothelial-derived mitogen that promotes V-SVZ cell proliferation. This purification strategy provides a platform to define the functional and molecular contribution of vascular cells to stem cell niches and other brain regions under different physiological and pathological states.
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24
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Nato G, Caramello A, Trova S, Avataneo V, Rolando C, Taylor V, Buffo A, Peretto P, Luzzati F. Striatal astrocytes produce neuroblasts in an excitotoxic model of Huntington's disease. Development 2015; 142:840-5. [PMID: 25655705 DOI: 10.1242/dev.116657] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In the adult brain, subsets of astrocytic cells residing in well-defined neurogenic niches constitutively generate neurons throughout life. Brain lesions can stimulate neurogenesis in otherwise non-neurogenic regions, but whether local astrocytic cells generate neurons in these conditions is unresolved. Here, through genetic and viral lineage tracing in mice, we demonstrate that striatal astrocytes become neurogenic following an acute excitotoxic lesion. Similar to astrocytes of adult germinal niches, these activated parenchymal progenitors express nestin and generate neurons through the formation of transit amplifying progenitors. These results shed new light on the neurogenic potential of the adult brain parenchyma.
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Affiliation(s)
- Giulia Nato
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy
| | - Alessia Caramello
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy
| | - Sara Trova
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy
| | - Valeria Avataneo
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy
| | - Chiara Rolando
- Departement of Biomedecin, University of Basel, Basel 4050, Switzerland
| | - Verdon Taylor
- Departement of Biomedecin, University of Basel, Basel 4050, Switzerland
| | - Annalisa Buffo
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy Department of Neuroscience Rita Levi-Montalcini, University of Turin, Turin 10126, Italy
| | - Paolo Peretto
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy
| | - Federico Luzzati
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10043, Italy
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25
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How to make neurons--thoughts on the molecular logic of neurogenesis in the central nervous system. Cell Tissue Res 2014; 359:5-16. [PMID: 25416507 DOI: 10.1007/s00441-014-2048-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 10/23/2014] [Indexed: 12/20/2022]
Abstract
Neuronal differentiation relies on a set of interconnected molecular events to achieve the differentiation of pan-neuronal hallmarks, together with neuronal subtype-specific features. Here, we propose a conceptual framework for these events, based on recent findings. This framework encompasses a dimension in time during development, progressing from early master regulators to later expressed effector genes and terminal selector genes. As a horizontal intersection, we propose the action of permissive fate determinants that are critical in allowing progression through the above transcriptional phases. Typically, these are widely expressed and often interact with the chromatin remodeling machinery. We conclude by discussing this model in the context of the direct fate conversion of various somatic cells into neurons.
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26
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Luzzati F, Nato G, Oboti L, Vigna E, Rolando C, Armentano M, Bonfanti L, Fasolo A, Peretto P. Quiescent neuronal progenitors are activated in the juvenile guinea pig lateral striatum and give rise to transient neurons. Development 2014; 141:4065-75. [DOI: 10.1242/dev.107987] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In the adult brain, active stem cells are a subset of astrocytes residing in the subventricular zone (SVZ) and the dentate gyrus (DG) of the hippocampus. Whether quiescent neuronal progenitors occur in other brain regions is unclear. Here, we describe a novel neurogenic system in the external capsule and lateral striatum (EC-LS) of the juvenile guinea pig that is quiescent at birth but becomes active around weaning. Activation of neurogenesis in this region was accompanied by the emergence of a neurogenic-like niche in the ventral EC characterized by chains of neuroblasts, intermediate-like progenitors and glial cells expressing markers of immature astrocytes. Like neurogenic astrocytes of the SVZ and DG, these latter cells showed a slow rate of proliferation and retained BrdU labeling for up to 65 days, suggesting that they are the primary progenitors of the EC-LS neurogenic system. Injections of GFP-tagged lentiviral vectors into the SVZ and the EC-LS of newborn animals confirmed that new LS neuroblasts originate from the activation of local progenitors and further supported their astroglial nature. Newborn EC-LS neurons existed transiently and did not contribute to neuronal addition or replacement. Nevertheless, they expressed Sp8 and showed strong tropism for white matter tracts, wherein they acquired complex morphologies. For these reasons, we propose that EC-LS neuroblasts represent a novel striatal cell type, possibly related to those populations of transient interneurons that regulate the development of fiber tracts during embryonic life.
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Affiliation(s)
- Federico Luzzati
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
| | - Giulia Nato
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
| | - Livio Oboti
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
| | - Elisa Vigna
- Department of Oncology, University of Turin, c/o Institute for Cancer Research and Treatment (IRCC), Candiolo 10060, Italy
| | - Chiara Rolando
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
- Department of Neuroscience, University of Turin, Turin 10126, Italy
| | - Maria Armentano
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
- Department of Veterinary Sciences, University of Turin, Grugliasco 10095, Italy
| | - Luca Bonfanti
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
- Department of Veterinary Sciences, University of Turin, Grugliasco 10095, Italy
| | - Aldo Fasolo
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
| | - Paolo Peretto
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Turin 10123, Italy
- Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano 10010, Italy
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27
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Intraventricular injection of 6-hydroxydopamine results in an increased number of tyrosine hydroxylase immune-positive cells in the rat cortex. Neuroscience 2014; 280:99-110. [PMID: 25230286 DOI: 10.1016/j.neuroscience.2014.09.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 09/04/2014] [Accepted: 09/05/2014] [Indexed: 01/28/2023]
Abstract
Previously we have demonstrated that intraventricular injection of 6-hydroxydopamine (6-OHDA) results in increased proliferation and de-differentiation of rat cortical astrocytes into progenitor-like cells 4 days after lesion (Wachter et al., 2010). To find out if these cells express tyrosine hydroxylase (TH), the rate-limiting enzyme in the catecholamine synthesis pathway, we performed immunohistochemistry in the rat cortex following intraventricular injection of 6-OHDA. Four days after injection we demonstrated a strong emergence of TH-positive (TH(+)) somata in the cortices of 6-OHDA-lesioned animals. The number of TH(+) cells in the cortex of 6-OHDA-lesioned animals was 15 times higher than in sham-operated animals, where virtually no TH(+) somata occurred. Combining TH immunohistochemistry with classical Nissl stain yielded complete congruency, and ∼45% of the TH(+) cells co-expressed calretinin, which indicates an interneuron affiliation. There was no co-staining of TH with other interneuron markers or with glial markers such as glial fibrillary acidic protein (GFAP) or the neural stem/progenitor marker Nestin, nor could we find co-localization with the proliferation marker Ki67. However, we found a co-localization of TH with glial progenitor cell markers (Sox2 and S100β) and with polysialylated-neural cell adhesion molecule (PSA-NCAM), which has been shown to be expressed in immature, but not recently generated cortical neurons. Taken together, this study seems to confirm our previous findings with respect to a 6-OHDA-induced expression of neuronal precursor markers in cells of the rat cortex, although the TH(+) cells found in this study are not identical with the potentially de-differentiated astrocytes described recently (Wachter et al., 2010). The detection of cortical cells expressing the catecholaminergic key enzyme TH might indicate a possible compensatory role of these cells in a dopamine-(DA)-depleted system. Future studies are needed to determine whether the TH(+) cells are capable of DA synthesis to confirm this hypothesis.
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28
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Dimou L, Götz M. Glial cells as progenitors and stem cells: new roles in the healthy and diseased brain. Physiol Rev 2014; 94:709-37. [PMID: 24987003 DOI: 10.1152/physrev.00036.2013] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The diverse functions of glial cells prompt the question to which extent specific subtypes may be devoted to a specific function. We discuss this by reviewing one of the most recently discovered roles of glial cells, their function as neural stem cells (NSCs) and progenitor cells. First we give an overview of glial stem and progenitor cells during development; these are the radial glial cells that act as NSCs and other glial progenitors, highlighting the distinction between the lineage of cells in vivo and their potential when exposed to a different environment, e.g., in vitro. We then proceed to the adult stage and discuss the glial cells that continue to act as NSCs across vertebrates and others that are more lineage-restricted, such as the adult NG2-glia, the most frequent progenitor type in the adult mammalian brain, that remain within the oligodendrocyte lineage. Upon certain injury conditions, a distinct subset of quiescent astrocytes reactivates proliferation and a larger potential, clearly demonstrating the concept of heterogeneity with distinct subtypes of, e.g., astrocytes or NG2-glia performing rather different roles after brain injury. These new insights not only highlight the importance of glial cells for brain repair but also their great potential in various aspects of regeneration.
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Affiliation(s)
- Leda Dimou
- Physiological Genomics, Institute of Physiology, Ludwig-Maximilians University, Munich, Germany; Institute for Stem Cell Research, HelmholtzZentrum, Neuherberg, Germany; and Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Magdalena Götz
- Physiological Genomics, Institute of Physiology, Ludwig-Maximilians University, Munich, Germany; Institute for Stem Cell Research, HelmholtzZentrum, Neuherberg, Germany; and Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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29
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Imayoshi I, Kageyama R. Oscillatory control of bHLH factors in neural progenitors. Trends Neurosci 2014; 37:531-8. [PMID: 25149265 DOI: 10.1016/j.tins.2014.07.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/02/2014] [Accepted: 07/27/2014] [Indexed: 10/24/2022]
Abstract
The mammalian brain consists of a complex ensemble of neurons and glia. Their production during development and remodeling is tightly controlled by various regulatory mechanisms in neural progenitor cells (NPCs). Among such regulations, basic helix-loop-helix (bHLH) factors have key functions in the self-renewal, multipotency, and fate determination of NPCs. Here, we highlight the importance of the expression dynamics of bHLH factors in these processes. The oscillatory expression of multiple bHLH factors is correlated with the multipotent and self-renewable state, whereas sustained expression of a selected bHLH factor regulates fate determination. We also discuss potential mechanisms by which a single bHLH factor can exhibit versatile functions in NPC regulation as well as the hierarchical structure of the bHLH factor oscillatory network.
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Affiliation(s)
- Itaru Imayoshi
- Institute for Virus Research, Kyoto University, Shogoin-Kawahara, Sakyo-ku, Kyoto 606-8507, Japan; The Hakubi Center, Kyoto University, Kyoto 606-8501, Japan; World Premier International Research Initiative-Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Japan Science and Technology Agency, Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
| | - Ryoichiro Kageyama
- Institute for Virus Research, Kyoto University, Shogoin-Kawahara, Sakyo-ku, Kyoto 606-8507, Japan; World Premier International Research Initiative-Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Japan Science and Technology Agency, Core Research for Evolutional Science and Technology (CREST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
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30
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Taverna E, Götz M, Huttner WB. The cell biology of neurogenesis: toward an understanding of the development and evolution of the neocortex. Annu Rev Cell Dev Biol 2014; 30:465-502. [PMID: 25000993 DOI: 10.1146/annurev-cellbio-101011-155801] [Citation(s) in RCA: 510] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Neural stem and progenitor cells have a central role in the development and evolution of the mammalian neocortex. In this review, we first provide a set of criteria to classify the various types of cortical stem and progenitor cells. We then discuss the issue of cell polarity, as well as specific subcellular features of these cells that are relevant for their modes of division and daughter cell fate. In addition, cortical stem and progenitor cell behavior is placed into a tissue context, with consideration of extracellular signals and cell-cell interactions. Finally, the differences across species regarding cortical stem and progenitor cells are dissected to gain insight into key developmental and evolutionary mechanisms underlying neocortex expansion.
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Affiliation(s)
- Elena Taverna
- Max-Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany;
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31
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Latchney SE, Rivera PD, Mao XW, Ferguson VL, Bateman TA, Stodieck LS, Nelson GA, Eisch AJ. The effect of spaceflight on mouse olfactory bulb volume, neurogenesis, and cell death indicates the protective effect of novel environment. J Appl Physiol (1985) 2014; 116:1593-604. [PMID: 24744382 DOI: 10.1152/japplphysiol.01174.2013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Space missions necessitate physiological and psychological adaptations to environmental factors not present on Earth, some of which present significant risks for the central nervous system (CNS) of crewmembers. One CNS region of interest is the adult olfactory bulb (OB), as OB structure and function are sensitive to environmental- and experience-induced regulation. It is currently unknown how the OB is altered by spaceflight. In this study, we evaluated OB volume and neurogenesis in mice shortly after a 13-day flight on Space Shuttle Atlantis [Space Transport System (STS)-135] relative to two groups of control mice maintained on Earth. Mice housed on Earth in animal enclosure modules that mimicked the conditions onboard STS-135 (AEM-Ground mice) had greater OB volume relative to mice maintained in standard housing on Earth (Vivarium mice), particularly in the granule (GCL) and glomerular (GL) cell layers. AEM-Ground mice also had more OB neuroblasts and fewer apoptotic cells relative to Vivarium mice. However, the AEM-induced increase in OB volume and neurogenesis was not seen in STS-135 mice (AEM-Flight mice), suggesting that spaceflight may have negated the positive effects of the AEM. In fact, when OB volume of AEM-Flight mice was considered, there was a greater density of apoptotic cells relative to AEM-Ground mice. Our findings suggest that factors present during spaceflight have opposing effects on OB size and neurogenesis, and provide insight into potential strategies to preserve OB structure and function during future space missions.
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Affiliation(s)
- Sarah E Latchney
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Phillip D Rivera
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Xiao W Mao
- Department of Basic Sciences, Division of Radiation Research, Loma Linda University and Medical Center, Loma Linda, California
| | - Virginia L Ferguson
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado; and
| | - Ted A Bateman
- Department of Biomedical Engineering, University of North Carolina, Chapel Hill, North Carolina
| | - Louis S Stodieck
- BioServe Space Technologies, Aerospace Engineering Sciences, University of Colorado at Boulder, Boulder, Colorado
| | - Gregory A Nelson
- Department of Basic Sciences, Division of Radiation Research, Loma Linda University and Medical Center, Loma Linda, California
| | - Amelia J Eisch
- Department of Psychiatry, University of Texas Southwestern Medical Center, Dallas, Texas;
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Sîrbulescu RF, Ilieş I, Zupanc GKH. Quantitative analysis reveals dominance of gliogenesis over neurogenesis in an adult brainstem oscillator. Dev Neurobiol 2014; 74:934-52. [PMID: 24639054 DOI: 10.1002/dneu.22176] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 02/01/2014] [Accepted: 03/12/2014] [Indexed: 01/31/2023]
Abstract
Neural stem/progenitor cells in the neurogenic niches of the adult brain are widely assumed to give rise predominantly to neurons, rather than glia. Here, we performed a quantitative analysis of the resident neural progenitors and their progeny in the adult pacemaker nucleus (Pn) of the weakly electric fish Apteronotus leptorhynchus. Approximately 15% of all cells in this brainstem nucleus are radial glia-like neural stem/progenitor cells. They are distributed uniformly within the tissue and are characterized by the expression of Sox2 and Meis 1/2/3. Approximately 2-3% of them are mitotically active, as indicated by expression of proliferating cell nuclear antigen. Labeling of proliferating cells with a single pulse of BrdU, followed by chases of up to 100 days, revealed that new cells are generated uniformly throughout the nucleus and do not undergo substantial migration. New cells differentiate into S100+ astrocytes and Hu C/D+ small interneurons at a ratio of 4:1, reflecting the proportions of the total glia and neurons in this brain region. The continuous addition of new cells leads to a diffuse growth of the Pn, which doubles in volume and total cell number over the first 2 years following sexual maturation of the fish. However, the number of pacemaker and relay cells, which constitute the oscillatory neural network, remains constant throughout adult life. We hypothesize that the dominance of gliogenesis is an adaptation to the high-frequency firing of the oscillatory neurons in this nucleus.
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Affiliation(s)
- Ruxandra F Sîrbulescu
- Laboratory of Neurobiology, Department of Biology, Northeastern University, Boston, Massachusetts, 02115
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Hauser KF, Knapp PE. Interactions of HIV and drugs of abuse: the importance of glia, neural progenitors, and host genetic factors. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2014; 118:231-313. [PMID: 25175867 PMCID: PMC4304845 DOI: 10.1016/b978-0-12-801284-0.00009-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Considerable insight has been gained into the comorbid, interactive effects of HIV and drug abuse in the brain using experimental models. This review, which considers opiates, methamphetamine, and cocaine, emphasizes the importance of host genetics and glial plasticity in driving the pathogenic neuron remodeling underlying neuro-acquired immunodeficiency syndrome and drug abuse comorbidity. Clinical findings are less concordant than experimental work, and the response of individuals to HIV and to drug abuse can vary tremendously. Host-genetic variability is important in determining viral tropism, neuropathogenesis, drug responses, and addictive behavior. However, genetic differences alone cannot account for individual variability in the brain "connectome." Environment and experience are critical determinants in the evolution of synaptic circuitry throughout life. Neurons and glia both exercise control over determinants of synaptic plasticity that are disrupted by HIV and drug abuse. Perivascular macrophages, microglia, and to a lesser extent astroglia can harbor the infection. Uninfected bystanders, especially astroglia, propagate and amplify inflammatory signals. Drug abuse by itself derails neuronal and glial function, and the outcome of chronic exposure is maladaptive plasticity. The negative consequences of coexposure to HIV and drug abuse are determined by numerous factors including genetics, sex, age, and multidrug exposure. Glia and some neurons are generated throughout life, and their progenitors appear to be targets of HIV and opiates/psychostimulants. The chronic nature of HIV and drug abuse appears to result in sustained alterations in the maturation and fate of neural progenitors, which may affect the balance of glial populations within multiple brain regions.
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Affiliation(s)
- Kurt F Hauser
- Department of Pharmacology & Toxicology, Institute for Drug and Alcohol Studies, Virginia Commonwealth University, Richmond, Virginia, USA.
| | - Pamela E Knapp
- Department of Pharmacology & Toxicology, Institute for Drug and Alcohol Studies, Virginia Commonwealth University, Richmond, Virginia, USA; Department of Anatomy & Neurobiology, Institute for Drug and Alcohol Studies, Virginia Commonwealth University, Richmond, Virginia, USA
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Hippenmeyer S. Dissection of gene function at clonal level using mosaic analysis with double markers. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s11515-013-1279-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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The BAF complex interacts with Pax6 in adult neural progenitors to establish a neurogenic cross-regulatory transcriptional network. Cell Stem Cell 2013; 13:403-18. [PMID: 23933087 DOI: 10.1016/j.stem.2013.07.002] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 05/05/2013] [Accepted: 07/09/2013] [Indexed: 11/22/2022]
Abstract
Numerous transcriptional regulators of neurogenesis have been identified in the developing and adult brain, but how neurogenic fate is programmed at the epigenetic level remains poorly defined. Here, we report that the transcription factor Pax6 directly interacts with the Brg1-containing BAF complex in adult neural progenitors. Deletion of either Brg1 or Pax6 in the subependymal zone (SEZ) causes the progeny of adult neural stem cells to convert to the ependymal lineage within the SEZ while migrating neuroblasts convert to different glial lineages en route to or in the olfactory bulb (OB). Genome-wide analyses reveal that the majority of genes downregulated in the Brg1 null SEZ and OB contain Pax6 binding sites and are also downregulated in Pax6 null SEZ and OB. Downstream of the Pax6-BAF complex, we find that Sox11, Nfib, and Pou3f4 form a transcriptional cross-regulatory network that drives neurogenesis and can convert postnatal glia into neurons. Taken together, elements of our work identify a tripartite effector network activated by Pax6-BAF that programs neuronal fate.
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