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Mariani JN, Mansky B, Madsen PM, Salinas D, Kesmen D, Huynh NPT, Kuypers NJ, Kesel ER, Bates J, Payne C, Chandler-Militello D, Benraiss A, Goldman SA. Repression of developmental transcription factor networks triggers aging-associated gene expression in human glial progenitor cells. Nat Commun 2024; 15:3873. [PMID: 38719882 PMCID: PMC11079006 DOI: 10.1038/s41467-024-48118-2] [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: 05/20/2023] [Accepted: 04/18/2024] [Indexed: 05/12/2024] Open
Abstract
Human glial progenitor cells (hGPCs) exhibit diminished expansion competence with age, as well as after recurrent demyelination. Using RNA-sequencing to compare the gene expression of fetal and adult hGPCs, we identify age-related changes in transcription consistent with the repression of genes enabling mitotic expansion, concurrent with the onset of aging-associated transcriptional programs. Adult hGPCs develop a repressive transcription factor network centered on MYC, and regulated by ZNF274, MAX, IKZF3, and E2F6. Individual over-expression of these factors in iPSC-derived hGPCs lead to a loss of proliferative gene expression and an induction of mitotic senescence, replicating the transcriptional changes incurred during glial aging. miRNA profiling identifies the appearance of an adult-selective miRNA signature, imposing further constraints on the expansion competence of aged GPCs. hGPC aging is thus associated with acquisition of a MYC-repressive environment, suggesting that suppression of these repressors of glial expansion may permit the rejuvenation of aged hGPCs.
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Affiliation(s)
- John N Mariani
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA.
| | - Benjamin Mansky
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Pernille M Madsen
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
- Center for Translational Neuromedicine, University of Copenhagen Faculty of Health, Copenhagen, 2200, Denmark
| | - Dennis Salinas
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Deniz Kesmen
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Nguyen P T Huynh
- Center for Translational Neuromedicine, University of Copenhagen Faculty of Health, Copenhagen, 2200, Denmark
| | - Nicholas J Kuypers
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Erin R Kesel
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Janna Bates
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Casey Payne
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Devin Chandler-Militello
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Abdellatif Benraiss
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Steven A Goldman
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA.
- Center for Translational Neuromedicine, University of Copenhagen Faculty of Health, Copenhagen, 2200, Denmark.
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2
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Ascanelli C, Dahir R, Wilson CH. Manipulating Myc for reparative regeneration. Front Cell Dev Biol 2024; 12:1357589. [PMID: 38577503 PMCID: PMC10991803 DOI: 10.3389/fcell.2024.1357589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/15/2024] [Indexed: 04/06/2024] Open
Abstract
The Myc family of proto-oncogenes is a key node for the signal transduction of external pro-proliferative signals to the cellular processes required for development, tissue homoeostasis maintenance, and regeneration across evolution. The tight regulation of Myc synthesis and activity is essential for restricting its oncogenic potential. In this review, we highlight the central role that Myc plays in regeneration across the animal kingdom (from Cnidaria to echinoderms to Chordata) and how Myc could be employed to unlock the regenerative potential of non-regenerative tissues in humans for therapeutic purposes. Mastering the fine balance of harnessing the ability of Myc to promote transcription without triggering oncogenesis may open the door to many exciting opportunities for therapeutic development across a wide array of diseases.
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Affiliation(s)
| | | | - Catherine H. Wilson
- Department of Pharmacology, University of Cambridge, Cambridge, United Kingdom
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3
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Fernández EC, Tomassoni L, Zhang X, Wang J, Obradovic A, Laise P, Griffin AT, Vlahos L, Minns HE, Morales DV, Simmons C, Gallitto M, Wei HJ, Martins TJ, Becker PS, Crawford JR, Tzaridis T, Wechsler-Reya RJ, Garvin J, Gartrell RD, Szalontay L, Zacharoulis S, Wu CC, Zhang Z, Califano A, Pavisic J. Elucidation and Pharmacologic Targeting of Master Regulator Dependencies in Coexisting Diffuse Midline Glioma Subpopulations. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.17.585370. [PMID: 38559080 PMCID: PMC10979998 DOI: 10.1101/2024.03.17.585370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Diffuse Midline Gliomas (DMGs) are universally fatal, primarily pediatric malignancies affecting the midline structures of the central nervous system. Despite decades of clinical trials, treatment remains limited to palliative radiation therapy. A major challenge is the coexistence of molecularly distinct malignant cell states with potentially orthogonal drug sensitivities. To address this challenge, we leveraged established network-based methodologies to elucidate Master Regulator (MR) proteins representing mechanistic, non-oncogene dependencies of seven coexisting subpopulations identified by single-cell analysis-whose enrichment in essential genes was validated by pooled CRISPR/Cas9 screens. Perturbational profiles of 372 clinically relevant drugs helped identify those able to invert the activity of subpopulation-specific MRs for follow-up in vivo validation. While individual drugs predicted to target individual subpopulations-including avapritinib, larotrectinib, and ruxolitinib-produced only modest tumor growth reduction in orthotopic models, systemic co-administration induced significant survival extension, making this approach a valuable contribution to the rational design of combination therapy.
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4
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Zou P, Wu C, Liu TCY, Duan R, Yang L. Oligodendrocyte progenitor cells in Alzheimer's disease: from physiology to pathology. Transl Neurodegener 2023; 12:52. [PMID: 37964328 PMCID: PMC10644503 DOI: 10.1186/s40035-023-00385-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/01/2023] [Indexed: 11/16/2023] Open
Abstract
Oligodendrocyte progenitor cells (OPCs) play pivotal roles in myelin formation and phagocytosis, communicating with neighboring cells and contributing to the integrity of the blood-brain barrier (BBB). However, under the pathological circumstances of Alzheimer's disease (AD), the brain's microenvironment undergoes detrimental changes that significantly impact OPCs and their functions. Starting with OPC functions, we delve into the transformation of OPCs to myelin-producing oligodendrocytes, the intricate signaling interactions with other cells in the central nervous system (CNS), and the fascinating process of phagocytosis, which influences the function of OPCs and affects CNS homeostasis. Moreover, we discuss the essential role of OPCs in BBB formation and highlight the critical contribution of OPCs in forming CNS-protective barriers. In the context of AD, the deterioration of the local microenvironment in the brain is discussed, mainly focusing on neuroinflammation, oxidative stress, and the accumulation of toxic proteins. The detrimental changes disturb the delicate balance in the brain, impacting the regenerative capacity of OPCs and compromising myelin integrity. Under pathological conditions, OPCs experience significant alterations in migration and proliferation, leading to impaired differentiation and a reduced ability to produce mature oligodendrocytes. Moreover, myelin degeneration and formation become increasingly active in AD, contributing to progressive neurodegeneration. Finally, we summarize the current therapeutic approaches targeting OPCs in AD. Strategies to revitalize OPC senescence, modulate signaling pathways to enhance OPC differentiation, and explore other potential therapeutic avenues are promising in alleviating the impact of AD on OPCs and CNS function. In conclusion, this review highlights the indispensable role of OPCs in CNS function and their involvement in the pathogenesis of AD. The intricate interplay between OPCs and the AD brain microenvironment underscores the complexity of neurodegenerative diseases. Insights from studying OPCs under pathological conditions provide a foundation for innovative therapeutic strategies targeting OPCs and fostering neurodegeneration. Future research will advance our understanding and management of neurodegenerative diseases, ultimately offering hope for effective treatments and improved quality of life for those affected by AD and related disorders.
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Affiliation(s)
- Peibin Zou
- Laboratory of Exercise and Neurobiology, School of Physical Education and Sports Science, South China Normal University, Guangzhou, 510006, China
- Department of Neurology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71103, USA
| | - Chongyun Wu
- Laboratory of Exercise and Neurobiology, School of Physical Education and Sports Science, South China Normal University, Guangzhou, 510006, China
| | - Timon Cheng-Yi Liu
- Laboratory of Exercise and Neurobiology, School of Physical Education and Sports Science, South China Normal University, Guangzhou, 510006, China
| | - Rui Duan
- Laboratory of Exercise and Neurobiology, School of Physical Education and Sports Science, South China Normal University, Guangzhou, 510006, China
| | - Luodan Yang
- Laboratory of Exercise and Neurobiology, School of Physical Education and Sports Science, South China Normal University, Guangzhou, 510006, China.
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5
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Selcen I, Prentice E, Casaccia P. The epigenetic landscape of oligodendrocyte lineage cells. Ann N Y Acad Sci 2023; 1522:24-41. [PMID: 36740586 PMCID: PMC10085863 DOI: 10.1111/nyas.14959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The epigenetic landscape of oligodendrocyte lineage cells refers to the cell-specific modifications of DNA, chromatin, and RNA that define a unique gene expression pattern of functionally specialized cells. Here, we focus on the epigenetic changes occurring as progenitors differentiate into myelin-forming cells and respond to the local environment. First, modifications of DNA, RNA, nucleosomal histones, key principles of chromatin organization, topologically associating domains, and local remodeling will be reviewed. Then, the relationship between epigenetic modulators and RNA processing will be explored. Finally, the reciprocal relationship between the epigenome as a determinant of the mechanical properties of cell nuclei and the target of mechanotransduction will be discussed. The overall goal is to provide an interpretative key on how epigenetic changes may account for the heterogeneity of the transcriptional profiles identified in this lineage.
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Affiliation(s)
- Ipek Selcen
- Graduate Program in Biochemistry, The Graduate Center of The City University of New York, New York, New York, USA.,Neuroscience Initiative, Advanced Science Research Center, The Graduate Center of The City University of New York, New York, New York, USA
| | - Emily Prentice
- Neuroscience Initiative, Advanced Science Research Center, The Graduate Center of The City University of New York, New York, New York, USA.,Graduate Program in Biology, The Graduate Center of The City University of New York, New York, New York, USA
| | - Patrizia Casaccia
- Graduate Program in Biochemistry, The Graduate Center of The City University of New York, New York, New York, USA.,Neuroscience Initiative, Advanced Science Research Center, The Graduate Center of The City University of New York, New York, New York, USA.,Graduate Program in Biology, The Graduate Center of The City University of New York, New York, New York, USA
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6
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Bergmann T, Liu Y, Skov J, Mogus L, Lee J, Pfisterer U, Handfield LF, Asenjo-Martinez A, Lisa-Vargas I, Seemann SE, Lee JTH, Patikas N, Kornum BR, Denham M, Hyttel P, Witter MP, Gorodkin J, Pers TH, Hemberg M, Khodosevich K, Hall VJ. Production of human entorhinal stellate cell-like cells by forward programming shows an important role of Foxp1 in reprogramming. Front Cell Dev Biol 2022; 10:976549. [PMID: 36046338 PMCID: PMC9420913 DOI: 10.3389/fcell.2022.976549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Stellate cells are principal neurons in the entorhinal cortex that contribute to spatial processing. They also play a role in the context of Alzheimer's disease as they accumulate Amyloid beta early in the disease. Producing human stellate cells from pluripotent stem cells would allow researchers to study early mechanisms of Alzheimer's disease, however, no protocols currently exist for producing such cells. In order to develop novel stem cell protocols, we characterize at high resolution the development of the porcine medial entorhinal cortex by tracing neuronal and glial subtypes from mid-gestation to the adult brain to identify the transcriptomic profile of progenitor and adult stellate cells. Importantly, we could confirm the robustness of our data by extracting developmental factors from the identified intermediate stellate cell cluster and implemented these factors to generate putative intermediate stellate cells from human induced pluripotent stem cells. Six transcription factors identified from the stellate cell cluster including RUNX1T1, SOX5, FOXP1, MEF2C, TCF4, EYA2 were overexpressed using a forward programming approach to produce neurons expressing a unique combination of RELN, SATB2, LEF1 and BCL11B observed in stellate cells. Further analyses of the individual transcription factors led to the discovery that FOXP1 is critical in the reprogramming process and omission of RUNX1T1 and EYA2 enhances neuron conversion. Our findings contribute not only to the profiling of cell types within the developing and adult brain's medial entorhinal cortex but also provides proof-of-concept for using scRNAseq data to produce entorhinal intermediate stellate cells from human pluripotent stem cells in-vitro.
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Affiliation(s)
- Tobias Bergmann
- Group of Brain Development and Disease, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Yong Liu
- Group of Brain Development and Disease, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Jonathan Skov
- Group of Brain Development and Disease, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Leo Mogus
- Group of Brain Development and Disease, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Julie Lee
- Novo Nordisk Foundation Center for Stem Cell Research, DanStem University of Copenhagen, Copenhagen, Denmark
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ulrich Pfisterer
- Biotech Research and Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Andrea Asenjo-Martinez
- Biotech Research and Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Irene Lisa-Vargas
- Biotech Research and Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Stefan E. Seemann
- Center for non-coding RNA in Technology and Health, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Jimmy Tsz Hang Lee
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Nikolaos Patikas
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Birgitte Rahbek Kornum
- Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mark Denham
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Aarhus University, Aarhus, Denmark
| | - Poul Hyttel
- Disease, Stem Cells and Embryology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Menno P. Witter
- Kavli Institute for Systems Neuroscience, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Jan Gorodkin
- Center for non-coding RNA in Technology and Health, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Tune H. Pers
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Martin Hemberg
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Konstantin Khodosevich
- Biotech Research and Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Vanessa Jane Hall
- Group of Brain Development and Disease, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
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7
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Accurate identification of circRNA landscape and complexity reveals their pivotal roles in human oligodendroglia differentiation. Genome Biol 2022; 23:48. [PMID: 35130952 PMCID: PMC8819885 DOI: 10.1186/s13059-022-02621-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 01/26/2022] [Indexed: 01/22/2023] Open
Abstract
Background Circular RNAs (circRNAs), a novel class of poorly conserved non-coding RNAs that regulate gene expression, are highly enriched in the human brain. Despite increasing discoveries of circRNA function in human neurons, the circRNA landscape and function in developing human oligodendroglia, the myelinating cells that govern neuronal conductance, remains unexplored. Meanwhile, improved experimental and computational tools for the accurate identification of circRNAs are needed. Results We adopt a published experimental approach for circRNA enrichment and develop CARP (CircRNA identification using A-tailing RNase R approach and Pseudo-reference alignment), a comprehensive 21-module computational framework for accurate circRNA identification and quantification. Using CARP, we identify developmentally programmed human oligodendroglia circRNA landscapes in the HOG oligodendroglioma cell line, distinct from neuronal circRNA landscapes. Numerous circRNAs display oligodendroglia-specific regulation upon differentiation, among which a subclass is regulated independently from their parental mRNAs. We find that circRNA flanking introns often contain cis-regulatory elements for RNA editing and are predicted to bind differentiation-regulated splicing factors. In addition, we discover novel oligodendroglia-specific circRNAs that are predicted to sponge microRNAs, which co-operatively promote oligodendroglia development. Furthermore, we identify circRNA clusters derived from differentiation-regulated alternative circularization events within the same gene, each containing a common circular exon, achieving additive sponging effects that promote human oligodendroglia differentiation. Conclusions Our results reveal dynamic regulation of human oligodendroglia circRNA landscapes during early differentiation and suggest critical roles of the circRNA-miRNA-mRNA axis in advancing human oligodendroglia development. Supplementary Information The online version contains supplementary material available at 10.1186/s13059-022-02621-1.
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8
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Marechal D, Dansu DK, Castro K, Patzig J, Magri L, Inbar B, Gacias M, Moyon S, Casaccia P. N-myc downstream regulated family member 1 (NDRG1) is enriched in myelinating oligodendrocytes and impacts myelin degradation in response to demyelination. Glia 2022; 70:321-336. [PMID: 34687571 PMCID: PMC8753715 DOI: 10.1002/glia.24108] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/05/2021] [Accepted: 10/05/2021] [Indexed: 02/03/2023]
Abstract
The N-myc downstream regulated gene family member 1 (NDRG1) is a gene whose mutation results in peripheral neuropathy with central manifestations. While most of previous studies characterized NDRG1 role in Schwann cells, the detection of central nervous system symptoms and the identification of NDRG1 as a gene silenced in the white matter of multiple sclerosis brains raise the question regarding its role in oligodendrocytes. Here, we show that NDRG1 is enriched in oligodendrocytes and myelin preparations, and we characterize its expression using a novel reporter mouse (TgNdrg1-EGFP). We report NDRG1 expression during developmental myelination and during remyelination after cuprizone-induced demyelination of the adult corpus callosum. The transcriptome of Ndrg1-EGFP+ cells further supports the identification of late myelinating oligodendrocytes, characterized by expression of genes regulating lipid metabolism and bioenergetics. We also generate a lineage specific conditional knockout (Olig1cre/+ ;Ndrg1fl/fl ) line to study its function. Null mice develop normally, and despite similar numbers of progenitor cells as wild type, they have fewer mature oligodendrocytes and lower levels of myelin proteins than controls, thereby suggesting NDRG1 as important for the maintenance of late myelinating oligodendrocytes. In addition, when control and Ndrg1 null mice are subject to cuprizone-induced demyelination, we observe a higher degree of demyelination in the mutants. Together these data identify NDRG1 as an important molecule for adult myelinating oligodendrocytes, whose decreased levels in the normal appearing white matter of human MS brains may result in greater susceptibility of myelin to damage.
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Affiliation(s)
- Damien Marechal
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA
| | - David K. Dansu
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA,Graduate Program in Biochemistry, The Graduate Center of The City University of New York, New York, NY 10016, USA
| | - Kamilah Castro
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA,Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Julia Patzig
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA
| | - Laura Magri
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Benjamin Inbar
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA
| | - Mar Gacias
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Sarah Moyon
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA
| | - Patrizia Casaccia
- Neuroscience Initiative, Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA,Graduate Program in Biochemistry, The Graduate Center of The City University of New York, New York, NY 10016, USA,Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA,Graduate Program in Biology, The Graduate Center of The City University of New York, New York, NY 10016, USA,Corresponding author:
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9
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Poeta E, Petralla S, Babini G, Renzi B, Celauro L, Magnifico MC, Barile SN, Masotti M, De Chirico F, Massenzio F, Viggiano L, Palmieri L, Virgili M, Lasorsa FM, Monti B. Histone Acetylation Defects in Brain Precursor Cells: A Potential Pathogenic Mechanism Causing Proliferation and Differentiation Dysfunctions in Mitochondrial Aspartate-Glutamate Carrier Isoform 1 Deficiency. Front Cell Neurosci 2022; 15:773709. [PMID: 35095421 PMCID: PMC8790092 DOI: 10.3389/fncel.2021.773709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/29/2021] [Indexed: 11/13/2022] Open
Abstract
Mitochondrial aspartate-glutamate carrier isoform 1 (AGC1) deficiency is an ultra-rare genetic disease characterized by global hypomyelination and brain atrophy, caused by mutations in the SLC25A12 gene leading to a reduction in AGC1 activity. In both neuronal precursor cells and oligodendrocytes precursor cells (NPCs and OPCs), the AGC1 determines reduced proliferation with an accelerated differentiation of OPCs, both associated with gene expression dysregulation. Epigenetic regulation of gene expression through histone acetylation plays a crucial role in the proliferation/differentiation of both NPCs and OPCs and is modulated by mitochondrial metabolism. In AGC1 deficiency models, both OPCs and NPCs show an altered expression of transcription factors involved in the proliferation/differentiation of brain precursor cells (BPCs) as well as a reduction in histone acetylation with a parallel alteration in the expression and activity of histone acetyltransferases (HATs) and histone deacetylases (HDACs). In this study, histone acetylation dysfunctions have been dissected in in vitro models of AGC1 deficiency OPCs (Oli-Neu cells) and NPCs (neurospheres), in physiological conditions and following pharmacological treatments. The inhibition of HATs by curcumin arrests the proliferation of OPCs leading to their differentiation, while the inhibition of HDACs by suberanilohydroxamic acid (SAHA) has only a limited effect on proliferation, but it significantly stimulates the differentiation of OPCs. In NPCs, both treatments determine an alteration in the commitment toward glial cells. These data contribute to clarifying the molecular and epigenetic mechanisms regulating the proliferation/differentiation of OPCs and NPCs. This will help to identify potential targets for new therapeutic approaches that are able to increase the OPCs pool and to sustain their differentiation toward oligodendrocytes and to myelination/remyelination processes in AGC1 deficiency, as well as in other white matter neuropathologies.
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Affiliation(s)
- Eleonora Poeta
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Sabrina Petralla
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Giorgia Babini
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Brunaldo Renzi
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Luigi Celauro
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Maria Chiara Magnifico
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Bari, Italy
| | - Simona Nicole Barile
- CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, Bari, Italy
| | - Martina Masotti
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | | | - Francesca Massenzio
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Luigi Viggiano
- Department of Biology, University of Bari Aldo Moro, Bari, Italy
| | - Luigi Palmieri
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Bari, Italy,CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, Bari, Italy
| | - Marco Virgili
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Francesco Massimo Lasorsa
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Bari, Italy,CNR Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, Bari, Italy,*Correspondence: Francesco Massimo Lasorsa,
| | - Barbara Monti
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy,Barbara Monti,
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10
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Deciphering the spatial-temporal transcriptional landscape of human hypothalamus development. Cell Stem Cell 2021; 29:328-343.e5. [PMID: 34879244 DOI: 10.1016/j.stem.2021.11.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 09/13/2021] [Accepted: 11/12/2021] [Indexed: 11/24/2022]
Abstract
The hypothalamus comprises various nuclei and neuronal subpopulations that control fundamental homeostasis and behaviors. However, spatiotemporal molecular characterization of hypothalamus development in humans is largely unexplored. Here, we revealed spatiotemporal transcriptome profiles and cell-type characteristics of human hypothalamus development and illustrated the molecular diversity of neural progenitors and the cell-fate decision, which is programmed by a combination of transcription factors. Different neuronal and glial fates are sequentially produced and showed spatial developmental asynchrony. Moreover, human hypothalamic gliogenesis occurs at an earlier stage of gestation and displays distinctive transcription profiles compared with those in mouse. Notably, early oligodendrocyte cells in humans exhibit different gene patterns and interact with neuronal cells to regulate neuronal maturation by Wnt, Hippo, and integrin signals. Overall, our study provides a comprehensive molecular landscape of human hypothalamus development at early- and mid-embryonic stages and a foundation for understanding its spatial and functional complexity.
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11
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Myc determines the functional age state of oligodendrocyte progenitor cells. NATURE AGING 2021; 1:826-837. [PMID: 37117631 DOI: 10.1038/s43587-021-00109-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 08/05/2021] [Indexed: 01/03/2023]
Abstract
Like many adult stem cell populations, the capacity of oligodendrocyte progenitor cells (OPCs) to proliferate and differentiate is substantially impaired with aging. Previous work has shown that tissue-wide transient expression of the pluripotency factors Oct4, Sox2, Klf4 and c-Myc extends lifespan and enhances somatic cell function. Here we show that just one of these factors, c-Myc, is sufficient to determine the age state of OPC: c-Myc expression in aged OPCs drives their functional rejuvenation, while its inhibition in neonatal OPCs induces an aged-like phenotype, as determined by in vitro assays and transcriptome analysis. Increasing c-Myc expression in aged OPCs in vivo restores their proliferation and differentiation capacity, thereby enhancing regeneration in an aged central nervous system environment. Our results directly link Myc to cellular activity and cell age state, with implications for understanding regeneration in the context of aging, and provide important insights into the biology of stem cell aging.
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12
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Dansu DK, Sauma S, Casaccia P. Oligodendrocyte progenitors as environmental biosensors. Semin Cell Dev Biol 2021; 116:38-44. [PMID: 33092959 PMCID: PMC8053729 DOI: 10.1016/j.semcdb.2020.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/23/2020] [Accepted: 09/27/2020] [Indexed: 01/10/2023]
Abstract
The past decade has seen an important revision of the traditional concept of the role and function of glial cells. From "passive support" for neurons, oligodendrocyte lineage cells are now recognized as metabolic exchangers with neurons, a cellular interface with blood vessels and responders to gut-derived metabolites or changes in the social environment. In the developing brain, the differentiation of neonatal oligodendrocyte progenitors (nOPCs) is required for normal brain function. In adulthood, the differentiation of adult OPCs (aOPCs) serves an important role in learning, behavioral adaptation and response to myelin injury. Here, we propose the concept of OPCs as environmental biosensors, which "sense" chemical and physical stimuli over time and adjust to the new challenges by modifying their epigenome and consequent transcriptome. Because epigenetics defines the ability of the cell to "adapt" gene expression to changes in the environment, we propose a model of OPC differentiation resulting from time-dependent changes of the epigenomic landscape in response to declining mitogens, raising hormone levels, neuronal activity, changes in space constraints or stiffness of the extracellular matrix. We propose that the intrinsically different functional properties of aOPCs compared to nOPCs result from the accrual of "epigenetic memories" of distinct events, which are "recorded" in the nuclei of OPCs as histone and DNA marks, defining a "unique epigenomic landscape" over time.
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Affiliation(s)
- David K Dansu
- Graduate Program in Biochemistry, Graduate Center of the City University of New York, New York, NY, USA; Neuroscience Initiative, Advanced Science Research Center, The Graduate Center of the City University of New York, New York, NY, USA
| | - Sami Sauma
- Graduate Program in Biology, Graduate Center of the City University of New York, New York, NY, USA; Neuroscience Initiative, Advanced Science Research Center, The Graduate Center of the City University of New York, New York, NY, USA
| | - Patrizia Casaccia
- Graduate Program in Biochemistry, Graduate Center of the City University of New York, New York, NY, USA; Graduate Program in Biology, Graduate Center of the City University of New York, New York, NY, USA; Neuroscience Initiative, Advanced Science Research Center, The Graduate Center of the City University of New York, New York, NY, USA.
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13
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Protein Kinase C Activation Drives a Differentiation Program in an Oligodendroglial Precursor Model through the Modulation of Specific Biological Networks. Int J Mol Sci 2021; 22:ijms22105245. [PMID: 34063504 PMCID: PMC8156399 DOI: 10.3390/ijms22105245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/07/2021] [Accepted: 05/12/2021] [Indexed: 02/03/2023] Open
Abstract
Protein kinase C (PKC) activation induces cellular reprogramming and differentiation in various cell models. Although many effectors of PKC physiological actions have been elucidated, the molecular mechanisms regulating oligodendrocyte differentiation after PKC activation are still unclear. Here, we applied a liquid chromatography–mass spectrometry (LC–MS/MS) approach to provide a comprehensive analysis of the proteome expression changes in the MO3.13 oligodendroglial cell line after PKC activation. Our findings suggest that multiple networks that communicate and coordinate with each other may finally determine the fate of MO3.13 cells, thus identifying a modular and functional biological structure. In this work, we provide a detailed description of these networks and their participating components and interactions. Such assembly allows perturbing each module, thus describing its physiological significance in the differentiation program. We applied this approach by targeting the Rho-associated protein kinase (ROCK) in PKC-activated cells. Overall, our findings provide a resource for elucidating the PKC-mediated network modules that contribute to a more robust knowledge of the molecular dynamics leading to this cell fate transition.
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14
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Pruvost M, Moyon S. Oligodendroglial Epigenetics, from Lineage Specification to Activity-Dependent Myelination. Life (Basel) 2021; 11:62. [PMID: 33467699 PMCID: PMC7830029 DOI: 10.3390/life11010062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 12/25/2022] Open
Abstract
Oligodendroglial cells are the myelinating cells of the central nervous system. While myelination is crucial to axonal activity and conduction, oligodendrocyte progenitor cells and oligodendrocytes have also been shown to be essential for neuronal support and metabolism. Thus, a tight regulation of oligodendroglial cell specification, proliferation, and myelination is required for correct neuronal connectivity and function. Here, we review the role of epigenetic modifications in oligodendroglial lineage cells. First, we briefly describe the epigenetic modalities of gene regulation, which are known to have a role in oligodendroglial cells. We then address how epigenetic enzymes and/or marks have been associated with oligodendrocyte progenitor specification, survival and proliferation, differentiation, and finally, myelination. We finally mention how environmental cues, in particular, neuronal signals, are translated into epigenetic modifications, which can directly influence oligodendroglial biology.
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Affiliation(s)
| | - Sarah Moyon
- Neuroscience Initiative Advanced Science Research Center, CUNY, 85 St Nicholas Terrace, New York, NY 10031, USA;
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15
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Oligodendrocytes in Development, Myelin Generation and Beyond. Cells 2019; 8:cells8111424. [PMID: 31726662 PMCID: PMC6912544 DOI: 10.3390/cells8111424] [Citation(s) in RCA: 259] [Impact Index Per Article: 51.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/07/2019] [Accepted: 11/07/2019] [Indexed: 02/06/2023] Open
Abstract
Oligodendrocytes are the myelinating cells of the central nervous system (CNS) that are generated from oligodendrocyte progenitor cells (OPC). OPC are distributed throughout the CNS and represent a pool of migratory and proliferative adult progenitor cells that can differentiate into oligodendrocytes. The central function of oligodendrocytes is to generate myelin, which is an extended membrane from the cell that wraps tightly around axons. Due to this energy consuming process and the associated high metabolic turnover oligodendrocytes are vulnerable to cytotoxic and excitotoxic factors. Oligodendrocyte pathology is therefore evident in a range of disorders including multiple sclerosis, schizophrenia and Alzheimer’s disease. Deceased oligodendrocytes can be replenished from the adult OPC pool and lost myelin can be regenerated during remyelination, which can prevent axonal degeneration and can restore function. Cell population studies have recently identified novel immunomodulatory functions of oligodendrocytes, the implications of which, e.g., for diseases with primary oligodendrocyte pathology, are not yet clear. Here, we review the journey of oligodendrocytes from the embryonic stage to their role in homeostasis and their fate in disease. We will also discuss the most common models used to study oligodendrocytes and describe newly discovered functions of oligodendrocytes.
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16
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B7H3 regulates differentiation and serves as a potential biomarker and theranostic target for human glioblastoma. J Transl Med 2019; 99:1117-1129. [PMID: 30914782 DOI: 10.1038/s41374-019-0238-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 02/09/2019] [Accepted: 02/18/2019] [Indexed: 12/27/2022] Open
Abstract
B7H3 (CD276), a co-stimulator molecule of the cell surface B7 protein superfamily, is expressed on glioblastomas (GBM). Recently, B7H3 functions beyond immune costimulation have been demonstrated. However, the mechanisms underlying B7H3 function are diverse and not well understood. GBM tumors contain undifferentiated self-renewing cells, which confound therapeutic attempts. We investigated the role of B7H3 in the regulation of GBM cell differentiation and the regulatory pathways involved. Analysis of public databases (TCGA, Rembrandt, and GEO NCBI) and RNA sequencing were performed to explore the role of B7H3 in GBM. Knockdown and overexpression of B7H3, were used to verify the downstream pathway in vitro. Further studies in vivo were performed to support the new finding. Bioinformatics analysis identified a correlation between the expression of B7H3, the expression of glioma self-renewing cell (GSC)-related genes, and MYC expression. These observations were verified by RNA-sequencing analyses in primary GBM cell lines. In vitro knockdown of B7H3-induced differentiation, associated with downregulation of SMAD6 (a TGF-β pathway inhibitor) and enhancement of SMAD1 phosphorylation-induced SMAD4 expression. Importantly, activation of the TGF-β pathway resulted in downregulation of MYC expression. In vivo assays conducted in a human GBM cell line xenograft mouse model demonstrated that B7H3 knockdown decreased MYC expression and inhibited tumor growth. B7H3 knockdown could regulate GBM differentiation by modulating MYC expression. So, B7H3 could serve as a potential theranostic target for the treatment of patients with GBM.
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17
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Baldassarro VA, Krężel W, Fernández M, Schuhbaur B, Giardino L, Calzà L. The role of nuclear receptors in the differentiation of oligodendrocyte precursor cells derived from fetal and adult neural stem cells. Stem Cell Res 2019; 37:101443. [PMID: 31022610 DOI: 10.1016/j.scr.2019.101443] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 04/10/2019] [Accepted: 04/16/2019] [Indexed: 10/27/2022] Open
Abstract
Oligodendrocyte precursor cells (OPCs) differentiation from multipotent neural stem cells (NSCs) into mature oligodendrocytes is driven by thyroid hormone and mediated by thyroid hormone receptors (TRs). We show that several nuclear receptors display strong changes in expression levels between fetal and adult NSCs, with an overexpression of TRβ and a lower expression of RXRγ in adult. Such changes may determine the reduced capacity of adult OPCs to differentiate as supported by reduced yield of maturation and compromised mRNA expression of key genes. RXRγ may be the determinant of these differences, on the evidence of reduced number of mature oligodendrocytes and increased number of proliferating OPCs in RXRγ-/- cultures. Such data also points to RXRγ as an important regulator of the cell cycle exit, as proved by the dysregulation of T3-induced cell cycle exit-related genes. Our data highlight the biological differences between fetal and adult OPCs and demonstrate the essential role of RXRγ in the T3-mediated OPCs maturation process.
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Affiliation(s)
- Vito Antonio Baldassarro
- Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Italy; Department of Pharmacy and Biotechnology, University of Bologna, Italy; Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Inserm, U1258 Illkirch, France; CNRS, UMR, 7104 Illkirch, France; Université de Strasbourg, Illkirch, France.
| | - Wojciech Krężel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Inserm, U1258 Illkirch, France; CNRS, UMR, 7104 Illkirch, France; Université de Strasbourg, Illkirch, France
| | | | - Brigitte Schuhbaur
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Inserm, U1258 Illkirch, France; CNRS, UMR, 7104 Illkirch, France; Université de Strasbourg, Illkirch, France
| | - Luciana Giardino
- Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Italy; IRET Foundation, Ozzano Emilia, Italy; Department of Veterinary Medical Sciences, University of Bologna, Italy
| | - Laura Calzà
- Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Italy; Department of Pharmacy and Biotechnology, University of Bologna, Italy; IRET Foundation, Ozzano Emilia, Italy
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18
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Tsai E, Casaccia P. Mechano-modulation of nuclear events regulating oligodendrocyte progenitor gene expression. Glia 2019; 67:1229-1239. [PMID: 30734358 DOI: 10.1002/glia.23595] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 01/03/2019] [Accepted: 01/14/2019] [Indexed: 12/20/2022]
Abstract
Oligodendrocytes differentiate from oligodendrocyte progenitor cells (OPCs) in response to distinct extracellular signals. This process requires changes in gene expression resulting from the interplay between transcription factors and epigenetic modulators. Extracellular signals include chemical and physical stimuli. This review focuses on the signaling mechanisms activated in oligodendrocyte progenitors in response to mechanical forces. Of particular interest is a better understanding on how these forces are transduced into the OPC nuclei and subsequently reshape their epigenetic landscape. Here we will introduce the concept of epigenetic regulation of gene expression, first in general and then focusing on the oligodendrocyte lineage. We will then review the current literature on mechano-transduction in distinct cell types, followed by pathways identified in myelinating oligodendrocytes and their progenitors. Overall, the reader will be provided with a comprehensive review of the signaling pathways which allow oligodendrocyte progenitors to "sense" physical forces and transduce them into patterns of gene expression.
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Affiliation(s)
- Eric Tsai
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, New York.,Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Patrizia Casaccia
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, New York.,Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York.,Department of Biology and Biochemistry, Neuroscience Initiative at the Advanced Science Research Center of the Graduate Center of The City University of New York, New York
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19
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Nowakowski TJ, Rani N, Golkaram M, Zhou HR, Alvarado B, Huch K, West JA, Leyrat A, Pollen AA, Kriegstein AR, Petzold LR, Kosik KS. Regulation of cell-type-specific transcriptomes by microRNA networks during human brain development. Nat Neurosci 2018; 21:1784-1792. [PMID: 30455455 PMCID: PMC6312854 DOI: 10.1038/s41593-018-0265-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 10/02/2018] [Indexed: 01/25/2023]
Abstract
MicroRNAs (miRNAs) regulate many cellular events during brain development by interacting with hundreds of mRNA transcripts. However, miRNAs operate nonuniformly upon the transcriptional profile with an as yet unknown logic. Shortcomings in defining miRNA-mRNA networks include limited knowledge of in vivo miRNA targets and their abundance in single cells. By combining multiple complementary approaches, high-throughput sequencing of RNA isolated by cross-linking immunoprecipitation with an antibody to AGO2 (AGO2-HITS-CLIP), single-cell profiling and computational analyses using bipartite and coexpression networks, we show that miRNA-mRNA interactions operate as functional modules that often correspond to cell-type identities and undergo dynamic transitions during brain development. These networks are highly dynamic during development and over the course of evolution. One such interaction is between radial-glia-enriched ORC4 and miR-2115, a great-ape-specific miRNA, which appears to control radial glia proliferation rates during human brain development.
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Affiliation(s)
- Tomasz J Nowakowski
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA.
- Department of Psychiatry, University of California, San Francisco, San Francisco, CA, USA.
| | - Neha Rani
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India
| | - Mahdi Golkaram
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Hongjun R Zhou
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Beatriz Alvarado
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA
- Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
| | - Kylie Huch
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Jay A West
- New Technologies, Fluidigm Corporation, South San Francisco, CA, USA
| | - Anne Leyrat
- New Technologies, Fluidigm Corporation, South San Francisco, CA, USA
| | - Alex A Pollen
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA
- Department of Anatomy, University of California, San Francisco, San Francisco, CA, USA
| | - Arnold R Kriegstein
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA
- Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
| | - Linda R Petzold
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, CA, USA
- Department of Computer Science, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Kenneth S Kosik
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, USA.
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, USA.
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20
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Su Y, Pelz C, Huang T, Torkenczy K, Wang X, Cherry A, Daniel CJ, Liang J, Nan X, Dai MS, Adey A, Impey S, Sears RC. Post-translational modification localizes MYC to the nuclear pore basket to regulate a subset of target genes involved in cellular responses to environmental signals. Genes Dev 2018; 32:1398-1419. [PMID: 30366908 PMCID: PMC6217735 DOI: 10.1101/gad.314377.118] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 09/04/2018] [Indexed: 12/14/2022]
Abstract
In this study, Su et al. investigate how post-translational modifications of Myc that affect stability and oncogenic activity regulate its function. They show that Ser62 phosphorylation and PIN1-mediated isomerization of MYC dynamically regulate the spatial distribution of MYC in the nucleus, promoting its association with the inner basket of the nuclear pore in response to proliferative signals, where it recruits the histone acetyltransferase GCN5 to bind and regulate local gene acetylation and expression, thus providing new insights into how post-translational modification of MYC controls its spatial activity. The transcription factor MYC (also c-Myc) induces histone modification, chromatin remodeling, and the release of paused RNA polymerase to broadly regulate transcription. MYC is subject to a series of post-translational modifications that affect its stability and oncogenic activity, but how these control MYC's function on the genome is largely unknown. Recent work demonstrates an intimate connection between nuclear compartmentalization and gene regulation. Here, we report that Ser62 phosphorylation and PIN1-mediated isomerization of MYC dynamically regulate the spatial distribution of MYC in the nucleus, promoting its association with the inner basket of the nuclear pore in response to proliferative signals, where it recruits the histone acetyltransferase GCN5 to bind and regulate local gene acetylation and expression. We demonstrate that PIN1-mediated localization of MYC to the nuclear pore regulates MYC target genes responsive to mitogen stimulation that are involved in proliferation and migration pathways. These changes are also present at the chromatin level, with an increase in open regulatory elements in response to stimulation that is PIN1-dependent and associated with MYC chromatin binding. Taken together, our study indicates that post-translational modification of MYC controls its spatial activity to optimally regulate gene expression in response to extrinsic signals in normal and diseased states.
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Affiliation(s)
- Yulong Su
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Carl Pelz
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA.,Oregon Stem Cell Center, Oregon Health and Science University, Oregon 97239, USA
| | - Tao Huang
- Department of Biomedical Engineering, Oregon Health and Science University, Oregon 97239, USA
| | - Kristof Torkenczy
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Xiaoyan Wang
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Allison Cherry
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Colin J Daniel
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Juan Liang
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Xiaolin Nan
- Department of Biomedical Engineering, Oregon Health and Science University, Oregon 97239, USA
| | - Mu-Shui Dai
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Andrew Adey
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
| | - Soren Impey
- Oregon Stem Cell Center, Oregon Health and Science University, Oregon 97239, USA
| | - Rosalie C Sears
- Department of Molecular and Medical Genetics, Oregon Health and Science University, Oregon 97239, USA
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21
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Nicaise AM, Johnson KM, Willis CM, Guzzo RM, Crocker SJ. TIMP-1 Promotes Oligodendrocyte Differentiation Through Receptor-Mediated Signaling. Mol Neurobiol 2018; 56:3380-3392. [PMID: 30121936 DOI: 10.1007/s12035-018-1310-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 08/08/2018] [Indexed: 12/19/2022]
Abstract
The extracellular protein tissue inhibitor of metalloproteinase (TIMP)-1 is both a matrix metalloproteinase (MMP) inhibitor and a trophic factor. Mice lacking TIMP-1 exhibit delayed central nervous system myelination during postnatal development and impaired remyelination following immune-mediated injury in adulthood. We have previously determined that the trophic action of TIMP-1 on oligodendrocyte progenitor cells (OPCs) to mature into oligodendrocytes is independent of its MMP inhibitory function. However, the mechanism by which TIMP-1 promotes OPC differentiation is not known. To address this gap in our understanding, herein, we report that TIMP-1 signals via a CD63/β1-integrin receptor complex to activate Akt (protein kinase B) to promote β-catenin signaling in OPCs. The regulation of β-catenin by TIMP-1 to promote OPC differentiation was counteracted, but not abrogated, by canonical signaling evoked by Wnt7a. These data provide a previously uncharacterized trophic action of TIMP-1 to regulate oligodendrocyte maturation via a CD63/β1-integrin/Akt pathway mechanism. These findings contribute to our emerging understanding on the role of TIMP-1 as a growth factor expressed to promote CNS myelination during development and induced in the adult to promote myelin repair.
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Affiliation(s)
- Alexandra M Nicaise
- Department of Neuroscience, University of Connecticut School of Medicine, 263 Farmington Ave, Farmington, CT, 06030, USA
| | - Kasey M Johnson
- Department of Neuroscience, University of Connecticut School of Medicine, 263 Farmington Ave, Farmington, CT, 06030, USA
| | - Cory M Willis
- Department of Neuroscience, University of Connecticut School of Medicine, 263 Farmington Ave, Farmington, CT, 06030, USA
| | - Rosa M Guzzo
- Department of Neuroscience, University of Connecticut School of Medicine, 263 Farmington Ave, Farmington, CT, 06030, USA
| | - Stephen J Crocker
- Department of Neuroscience, University of Connecticut School of Medicine, 263 Farmington Ave, Farmington, CT, 06030, USA.
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22
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Abstract
Although the core concept of remyelination - based on the activation, migration, proliferation and differentiation of CNS progenitors - has not changed over the past 20 years, our understanding of the detailed mechanisms that underlie this process has developed considerably. We can now decorate the central events of remyelination with a host of pathways, molecules, mediators and cells, revealing a complex and precisely orchestrated process. These advances have led to recent drug-based and cell-based clinical trials for myelin diseases and have opened up hitherto unrecognized opportunities for drug-based approaches to therapeutically enhance remyelination.
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23
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IDH-mutant glioma specific association of rs55705857 located at 8q24.21 involves MYC deregulation. Sci Rep 2016; 6:27569. [PMID: 27282637 PMCID: PMC4901315 DOI: 10.1038/srep27569] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 05/16/2016] [Indexed: 12/20/2022] Open
Abstract
The single nucleotide polymorphism rs55705857, located in a non-coding but evolutionarily conserved region at 8q24.21, is strongly associated with IDH-mutant glioma development and was suggested to be a causal variant. However, the molecular mechanism underlying this association has remained unknown. With a case control study in 285 gliomas, 316 healthy controls, 380 systemic cancers, 31 other CNS-tumors, and 120 IDH-mutant cartilaginous tumors, we identified that the association was specific to IDH-mutant gliomas. Odds-ratios were 9.25 (5.17–16.52; 95% CI) for IDH-mutated gliomas and 12.85 (5.94–27.83; 95% CI) for IDH-mutated, 1p/19q co-deleted gliomas. Decreasing strength with increasing anaplasia implied a modulatory effect. No somatic mutations were noted at this locus in 114 blood-tumor pairs, nor was there a copy number difference between risk-allele and only-ancestral allele carriers. CCDC26 RNA-expression was rare and not different between the two groups. There were only minor subtype-specific differences in common glioma driver genes. RNA sequencing and LC-MS/MS comparisons pointed to significantly altered MYC-signaling. Baseline enhancer activity of the conserved region specifically on the MYC promoter and its further positive modulation by the SNP risk-allele was shown in vitro. Our findings implicate MYC deregulation as the underlying cause of the observed association.
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24
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Abstract
Oligodendrocytes produce myelin, an insulating sheath required for the saltatory conduction of electrical impulses along axons. Oligodendrocyte loss results in demyelination, which leads to impaired neurological function in a broad array of diseases ranging from pediatric leukodystrophies and cerebral palsy, to multiple sclerosis and white matter stroke. Accordingly, replacing lost oligodendrocytes, whether by transplanting oligodendrocyte progenitor cells (OPCs) or by mobilizing endogenous progenitors, holds great promise as a therapeutic strategy for the diseases of central white matter. In this Primer, we describe the molecular events regulating oligodendrocyte development and how our understanding of this process has led to the establishment of methods for producing OPCs and oligodendrocytes from embryonic stem cells and induced pluripotent stem cells, as well as directly from somatic cells. In addition, we will discuss the safety of engrafted stem cell-derived OPCs, as well as approaches by which to modulate their differentiation and myelinogenesis in vivo following transplantation.
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Affiliation(s)
- Steven A Goldman
- Center for Translational Neuromedicine and the Department of Neurology, University of Rochester Medical Center, Rochester, NY 14642, USA Center for Basic and Translational Neuroscience, University of Copenhagen, Faculty of Health and Medical Sciences, Copenhagen 2200, Denmark Neuroscience Center, Rigshospitalet, Copenhagen 2100, Denmark
| | - Nicholas J Kuypers
- Center for Translational Neuromedicine and the Department of Neurology, University of Rochester Medical Center, Rochester, NY 14642, USA
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25
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Mateo-Lozano S, García M, Rodríguez-Hernández CJ, de Torres C. Regulation of Differentiation by Calcium-Sensing Receptor in Normal and Tumoral Developing Nervous System. Front Physiol 2016; 7:169. [PMID: 27242543 PMCID: PMC4861737 DOI: 10.3389/fphys.2016.00169] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/25/2016] [Indexed: 12/14/2022] Open
Abstract
During normal development of the nervous system (NS), neural progenitor cells (NPCs) produce specialized populations of neurons and glial cells upon cell fate restriction and terminal differentiation. These sequential processes require the dynamic regulation of thousands of genes. The calcium-sensing receptor (CaSR) is temporally and spatially regulated in both neurons and glial cells during development of the NS. In particular, CaSR expression and function have been shown to play a significant role during differentiation of NPCs toward the oligodendrocyte lineage and also in maturation of cerebellar granule cell precursors (GCPs). Moreover, CaSR regulates axonal and dendritic growth in both central and peripheral nervous systems (PNSs), a process necessary for proper construction of mature neuronal networks. On the other hand, several lines of evidence support a role for CaSR in promotion of cell differentiation and inhibition of proliferation in neuroblastoma, a tumor arising from precursor cells of developing PNS. Thus, among the variety of NS functions in which the CaSR participates, this mini-review focuses on its role in differentiation of normal and tumoral cells. Current knowledge of the mechanisms responsible for CaSR regulation and function in these contexts is also discussed, together with the therapeutic opportunities provided by CaSR allosteric modulators.
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Affiliation(s)
- Silvia Mateo-Lozano
- Developmental Tumor Biology Laboratory, Institut de Recerca Pediàtrica - Hospital Sant Joan de Déu Barcelona, Spain
| | - Marta García
- Developmental Tumor Biology Laboratory, Institut de Recerca Pediàtrica - Hospital Sant Joan de Déu Barcelona, Spain
| | - Carlos J Rodríguez-Hernández
- Developmental Tumor Biology Laboratory, Institut de Recerca Pediàtrica - Hospital Sant Joan de Déu Barcelona, Spain
| | - Carmen de Torres
- Developmental Tumor Biology Laboratory, Institut de Recerca Pediàtrica - Hospital Sant Joan de DéuBarcelona, Spain; Department of Oncology, Institut de Recerca Pediàtrica - Hospital Sant Joan de DéuBarcelona, Spain
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26
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Moyon S, Liang J, Casaccia P. Epigenetics in NG2 glia cells. Brain Res 2016; 1638:183-198. [PMID: 26092401 PMCID: PMC4683112 DOI: 10.1016/j.brainres.2015.06.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/11/2015] [Accepted: 06/02/2015] [Indexed: 12/16/2022]
Abstract
The interplay of transcription and epigenetic marks is essential for oligodendrocyte progenitor cell (OPC) proliferation and differentiation during development. Here, we review the recent advances in this field and highlight mechanisms of transcriptional repression and activation involved in OPC proliferation, differentiation and plasticity. We also describe how dysregulation of these epigenetic events may affect demyelinating disorders, and consider potential ways to manipulate NG2 cell behavior through modulation of the epigenome. This article is part of a Special Issue entitled SI:NG2-glia(Invited only).
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Affiliation(s)
- Sarah Moyon
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Jialiang Liang
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Patrizia Casaccia
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Corinne Goldsmith Dickinson Center for Multiple Sclerosis, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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27
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Douvaras P, Rusielewicz T, Kim KH, Haines JD, Casaccia P, Fossati V. Epigenetic Modulation of Human Induced Pluripotent Stem Cell Differentiation to Oligodendrocytes. Int J Mol Sci 2016; 17:ijms17040614. [PMID: 27110779 PMCID: PMC4849063 DOI: 10.3390/ijms17040614] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 04/16/2016] [Accepted: 04/19/2016] [Indexed: 12/12/2022] Open
Abstract
Pluripotent stem cells provide an invaluable tool for generating human, disease-relevant cells. Multiple sclerosis is an inflammatory demyelinating disease of the central nervous system, characterized by myelin damage. Oligodendrocytes are the myelinating cells of the central nervous system (CNS); they differentiate from progenitor cells, and their membranes ensheath axons, providing trophic support and allowing fast conduction velocity. The current understanding of oligodendrocyte biology was founded by rodent studies, where the establishment of repressive epigenetic marks on histone proteins, followed by activation of myelin genes, leads to lineage progression. To assess whether this epigenetic regulation is conserved across species, we differentiated human embryonic and induced pluripotent stem cells to oligodendrocytes and asked whether similar histone marks and relative enzymatic activities could be detected. The transcriptional levels of enzymes responsible for methylation and acetylation of histone marks were analyzed during oligodendrocyte differentiation, and the post-translational modifications on histones were detected using immunofluorescence. These studies showed that also in human cells, differentiation along the oligodendrocyte lineage is characterized by the acquisition of multiple repressive histone marks, including deacetylation of lysine residues on histone H3 and trimethylation of residues K9 and K27. These data suggest that the epigenetic modulation of oligodendrocyte identity is highly conserved across species.
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Affiliation(s)
- Panagiotis Douvaras
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA.
| | - Tomasz Rusielewicz
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA.
| | - Kwi Hye Kim
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Jeffery D Haines
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Patrizia Casaccia
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Valentina Fossati
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA.
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28
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Ntranos A, Casaccia P. Bromodomains: Translating the words of lysine acetylation into myelin injury and repair. Neurosci Lett 2015; 625:4-10. [PMID: 26472704 DOI: 10.1016/j.neulet.2015.10.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Revised: 09/23/2015] [Accepted: 10/05/2015] [Indexed: 01/14/2023]
Abstract
Bromodomains are evolutionarily highly conserved α-helical structural motifs that recognize and bind acetylated lysine residues. Lysine acetylation is being increasingly recognized as a major posttranslational modification involved in diverse cellular processes and protein interactions and its deregulation has been implicated in the pathophysiology of various human diseases, such as multiple sclerosis and cancer. Bromodomain-containing proteins can have a wide variety of functions, ranging from histone acetyltransferase activity and chromatin remodeling to transcriptional mediation and co-activation. The role of bromodomains in translating a deregulated cell acetylome into disease phenotypes was recently unveiled by the development of small molecule bromodomain inhibitors. This breakthrough discovery highlighted bromodomain-containing proteins as key players of inflammatory pathways responsible for myelin injury and also demonstrated their role in several aspects of myelin repair including oligodendrocyte differentiation and axonal regeneration.
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Affiliation(s)
- Achilles Ntranos
- Department of Neurology, Icahn School of Medicine at Mount Sinai, 1428 Madison Ave, New York, NY 10029, USA.
| | - Patrizia Casaccia
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, 1428 Madison Ave, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1428 Madison Ave, New York, NY 10029, USA; Corinne Goldsmith Dickinson Center for Multiple Sclerosis, Icahn School of Medicine at Mount Sinai, 1428 Madison Ave, New York, NY 10029, USA
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29
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Arenas-Mena C, Coffman JA. Developmental control of transcriptional and proliferative potency during the evolutionary emergence of animals. Dev Dyn 2015; 244:1193-201. [PMID: 26173445 PMCID: PMC4705838 DOI: 10.1002/dvdy.24305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 06/18/2015] [Accepted: 07/07/2015] [Indexed: 12/13/2022] Open
Abstract
It is proposed that the evolution of complex animals required repressive genetic mechanisms for controlling the transcriptional and proliferative potency of cells. Unicellular organisms are transcriptionally potent, able to express their full genetic complement as the need arises through their life cycle, whereas differentiated cells of multicellular organisms can only express a fraction of their genomic potential. Likewise, whereas cell proliferation in unicellular organisms is primarily limited by nutrient availability, cell proliferation in multicellular organisms is developmentally regulated. Repressive genetic controls limiting the potency of cells at the end of ontogeny would have stabilized the gene expression states of differentiated cells and prevented disruptive proliferation, allowing the emergence of diverse cell types and functional shapes. We propose that distal cis-regulatory elements represent the primary innovations that set the stage for the evolution of developmental gene regulatory networks and the repressive control of key multipotency and cell-cycle control genes. The testable prediction of this model is that the genomes of extant animals, unlike those of our unicellular relatives, encode gene regulatory circuits dedicated to the developmental control of transcriptional and proliferative potency.
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Affiliation(s)
- Cesar Arenas-Mena
- Department of Biology, College of Staten Island and Graduate Center, The City University of New York (CUNY), Staten Island, New York
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30
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Hernandez M, Casaccia P. Interplay between transcriptional control and chromatin regulation in the oligodendrocyte lineage. Glia 2015; 63:1357-75. [PMID: 25970296 DOI: 10.1002/glia.22818] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 02/26/2015] [Indexed: 12/21/2022]
Abstract
The recent years have been characterized by a surge of studies on the role of transcription factors and histone modifications in regulating the progression of progenitors into oligodendrocytes. This review summarizes this body of evidence and presents an integrated view of transcriptional networks and epigenetic regulators defining proliferating progenitors and their differentiation along the oligodendrocyte lineage. We suggest that transcription factors in proliferating progenitors have direct access to DNA, due to predominantly euchromatic nuclei. As progenitors differentiate, however, transcriptional competence is modulated by the formation of heterochromatin, which modifies the association of DNA with nucleosomal histones and renders the access of transcription factors dependent on the activity of epigenetic modulators. These concepts are delineated within the context of development, and the potential functional implications are discussed.
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Affiliation(s)
- Marylens Hernandez
- Department of Neuroscience, Friedman Brain Institute and Icahn School of Medicine at Mount Sinai, New York City, New York.,Graduate School of Biological Sciences, Icahn School of Medicine at Mount Sinai, New York City, New York
| | - Patrizia Casaccia
- Department of Neuroscience, Friedman Brain Institute and Icahn School of Medicine at Mount Sinai, New York City, New York.,Department of Genomics and Multiscale Biology, Friedman Brain Institute and Icahn School of Medicine at Mount Sinai, New York City, New York
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31
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Pan XN, Chen JJ, Wang LX, Xiao RZ, Liu LL, Fang ZG, Liu Q, Long ZJ, Lin DJ. Inhibition of c-Myc overcomes cytotoxic drug resistance in acute myeloid leukemia cells by promoting differentiation. PLoS One 2014; 9:e105381. [PMID: 25127121 PMCID: PMC4134294 DOI: 10.1371/journal.pone.0105381] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 07/22/2014] [Indexed: 01/04/2023] Open
Abstract
Nowadays, drug resistance still represents a major obstacle to successful acute myeloid leukemia (AML) treatment and the underlying mechanism is not fully elucidated. Here, we found that high expression of c-Myc was one of the cytogenetic characteristics in the drug-resistant leukemic cells. c-Myc over-expression in leukemic cells induced resistance to chemotherapeutic drugs, enhanced colony formation capacity and inhibited cell differentiation induced by all-trans retinoic acid (ATRA). Meanwhile, inhibition of c-Myc by shRNA or specific c-Myc inhibitor 10058-F4 rescued the sensitivity to cytotoxic drugs, restrained the colony formation ability and promoted differentiation. RT-PCR and western blotting analysis showed that down-regulation of C/EBPβ contributed to the poor differentiation state of leukemic cells induced by c-Myc over-expression. Importantly, over-expression of C/EBPβ could reverse c-Myc induced drug resistance. In primary AML cells, the c-Myc expression was negatively correlated with C/EBPβ. 10058-F4, displayed anti-proliferative activity and increased cellular differentiation with up-regulation of C/EBPβ in primary AML cells. Thus, our study indicated that c-Myc could be a novel target to overcome drug resistance, providing a new approach in AML therapy.
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Affiliation(s)
- Xiao-Na Pan
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Jia-Jie Chen
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Le-Xun Wang
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Ruo-Zhi Xiao
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Ling-Ling Liu
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Zhi-Gang Fang
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Quentin Liu
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
| | - Zi-Jie Long
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
- * E-mail: (ZL); (DL)
| | - Dong-Jun Lin
- Department of Hematology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Sun Yat-sen Institute of Hematology, Sun Yat-sen University, Guangzhou, China
- * E-mail: (ZL); (DL)
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32
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Gacias M, Gerona-Navarro G, Plotnikov AN, Zhang G, Zeng L, Kaur J, Moy G, Rusinova E, Rodriguez Y, Matikainen B, Vincek A, Joshua J, Casaccia P, Zhou MM. Selective chemical modulation of gene transcription favors oligodendrocyte lineage progression. CHEMISTRY & BIOLOGY 2014; 21:841-854. [PMID: 24954007 PMCID: PMC4104156 DOI: 10.1016/j.chembiol.2014.05.009] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 04/28/2014] [Accepted: 05/01/2014] [Indexed: 01/07/2023]
Abstract
Lysine acetylation regulates gene expression through modulating protein-protein interactions in chromatin. Chemical inhibition of acetyl-lysine binding bromodomains of the major chromatin regulators BET (bromodomain and extraterminal domain) proteins has been shown to effectively block cell proliferation in cancer and inflammation. However, whether selective inhibition of individual BET bromodomains has distinctive functional consequences remains only partially understood. In this study, we show that selective chemical inhibition of the first bromodomain of BET proteins using our small-molecule inhibitor, Olinone, accelerated the progression of mouse primary oligodendrocyte progenitors toward differentiation, whereas inhibition of both bromodomains of BET proteins hindered differentiation. This effect was target specific, as it was not detected in cells treated with inactive analogs and independent of any effect on proliferation. Therefore, selective chemical modulation of individual bromodomains, rather than use of broad-based inhibitors, may enhance regenerative strategies in disorders characterized by myelin loss such as aging and neurodegeneration.
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Affiliation(s)
- Mar Gacias
- Departments of Neuroscience, and Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Guillermo Gerona-Navarro
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
- Department of Chemistry, Brooklyn College, 2900 Bedford Avenue, Room 351 NE, Brooklyn, NY 11210, USA
| | - Alexander N. Plotnikov
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Guangtao Zhang
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Lei Zeng
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Jasbir Kaur
- Departments of Neuroscience, and Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Gregory Moy
- Departments of Neuroscience, and Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Elena Rusinova
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Yoel Rodriguez
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
- Department of Natural Sciences, Hostos Community College of CUNY, Bronx, NY 10451, USA
| | - Bridget Matikainen
- Departments of Neuroscience, and Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Adam Vincek
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Jennifer Joshua
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
| | - Patrizia Casaccia
- Departments of Neuroscience, and Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
- Correspondence should be addressed to M.-M. Z. (), or P.C. ()
| | - Ming-Ming Zhou
- Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA
- Correspondence should be addressed to M.-M. Z. (), or P.C. ()
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