1
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Thomas GE, Egan G, García-Prat L, Botham A, Voisin V, Patel PS, Hoff FW, Chin J, Nachmias B, Kaufmann KB, Khan DH, Hurren R, Wang X, Gronda M, MacLean N, O'Brien C, Singh RP, Jones CL, Harding SM, Raught B, Arruda A, Minden MD, Bader GD, Hakem R, Kornblau S, Dick JE, Schimmer AD. The metabolic enzyme hexokinase 2 localizes to the nucleus in AML and normal haematopoietic stem and progenitor cells to maintain stemness. Nat Cell Biol 2022; 24:872-884. [PMID: 35668135 PMCID: PMC9203277 DOI: 10.1038/s41556-022-00925-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 04/22/2022] [Indexed: 11/21/2022]
Abstract
Mitochondrial metabolites regulate leukaemic and normal stem cells by affecting epigenetic marks. How mitochondrial enzymes localize to the nucleus to control stem cell function is less understood. We discovered that the mitochondrial metabolic enzyme hexokinase 2 (HK2) localizes to the nucleus in leukaemic and normal haematopoietic stem cells. Overexpression of nuclear HK2 increases leukaemic stem cell properties and decreases differentiation, whereas selective nuclear HK2 knockdown promotes differentiation and decreases stem cell function. Nuclear HK2 localization is phosphorylation-dependent, requires active import and export, and regulates differentiation independently of its enzymatic activity. HK2 interacts with nuclear proteins regulating chromatin openness, increasing chromatin accessibilities at leukaemic stem cell-positive signature and DNA-repair sites. Nuclear HK2 overexpression decreases double-strand breaks and confers chemoresistance, which may contribute to the mechanism by which leukaemic stem cells resist DNA-damaging agents. Thus, we describe a non-canonical mechanism by which mitochondrial enzymes influence stem cell function independently of their metabolic function. Thomas, Egan et al. report that hexokinase 2 localizes to the nucleus of leukaemic and normal haematopoietic cells to maintain stemness by interacting with nuclear proteins and modulating chromatin accessibility independently of its kinase activity.
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Affiliation(s)
- Geethu Emily Thomas
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Grace Egan
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.,Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Laura García-Prat
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Aaron Botham
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Veronique Voisin
- Terrence Donnelly Centre for Cellular and Biomedical Research, University of Toronto, Toronto, Ontario, Canada
| | - Parasvi S Patel
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Fieke W Hoff
- Department of Pediatric Hematology/Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - Jordan Chin
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Boaz Nachmias
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Kerstin B Kaufmann
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Dilshad H Khan
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Rose Hurren
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Xiaoming Wang
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Marcela Gronda
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Neil MacLean
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Cristiana O'Brien
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Rashim P Singh
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Courtney L Jones
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Shane M Harding
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Brian Raught
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Andrea Arruda
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Mark D Minden
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Gary D Bader
- Terrence Donnelly Centre for Cellular and Biomedical Research, University of Toronto, Toronto, Ontario, Canada
| | - Razq Hakem
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Steve Kornblau
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - John E Dick
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Aaron D Schimmer
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
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2
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Dell’Orso S, Juan AH, Moiseeva V, García-Prat L, Muñoz-Cánoves P, Sartorelli V. Protocol for RNA-seq library preparation starting from a rare muscle stem cell population or a limited number of mouse embryonic stem cells. STAR Protoc 2021; 2:100451. [PMID: 33937872 PMCID: PMC8079445 DOI: 10.1016/j.xpro.2021.100451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
It remains challenging to generate reproducible, high-quality cDNA libraries from RNA derived from rare cell populations. Here, we describe a protocol for high-throughput RNA-seq library preparation, including isolation of 200 skeletal muscle stem cells from mouse tibialis anterior muscle by fluorescence-activated cell sorting and cDNA preparation. We also describe RNA extraction and cDNA preparation from differentiating mouse embryonic stem cells. For complete details on the use and execution of this protocol, please refer to Juan et al. (2016) and Garcia-Prat et al. (2016).
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Affiliation(s)
| | - Aster H. Juan
- Laboratory of Muscle Stem Cells and Gene Regulation, NIAMS, NIH, Bethesda, MD 20892, USA
| | - Victoria Moiseeva
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED) and ICREA, Barcelona, Spain
- Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain
| | - Laura García-Prat
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED) and ICREA, Barcelona, Spain
- Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Pura Muñoz-Cánoves
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED) and ICREA, Barcelona, Spain
- Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain
| | - Vittorio Sartorelli
- Laboratory of Muscle Stem Cells and Gene Regulation, NIAMS, NIH, Bethesda, MD 20892, USA
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3
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García-Prat L, Perdiguero E, Alonso-Martín S, Dell'Orso S, Ravichandran S, Brooks SR, Juan AH, Campanario S, Jiang K, Hong X, Ortet L, Ruiz-Bonilla V, Flández M, Moiseeva V, Rebollo E, Jardí M, Sun HW, Musarò A, Sandri M, Del Sol A, Sartorelli V, Muñoz-Cánoves P. FoxO maintains a genuine muscle stem-cell quiescent state until geriatric age. Nat Cell Biol 2020; 22:1307-1318. [PMID: 33106654 DOI: 10.1038/s41556-020-00593-7] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 09/15/2020] [Indexed: 02/07/2023]
Abstract
Tissue regeneration declines with ageing but little is known about whether this arises from changes in stem-cell heterogeneity. Here, in homeostatic skeletal muscle, we identify two quiescent stem-cell states distinguished by relative CD34 expression: CD34High, with stemness properties (genuine state), and CD34Low, committed to myogenic differentiation (primed state). The genuine-quiescent state is unexpectedly preserved into later life, succumbing only in extreme old age due to the acquisition of primed-state traits. Niche-derived IGF1-dependent Akt activation debilitates the genuine stem-cell state by imposing primed-state features via FoxO inhibition. Interventions to neutralize Akt and promote FoxO activity drive a primed-to-genuine state conversion, whereas FoxO inactivation deteriorates the genuine state at a young age, causing regenerative failure of muscle, as occurs in geriatric mice. These findings reveal transcriptional determinants of stem-cell heterogeneity that resist ageing more than previously anticipated and are only lost in extreme old age, with implications for the repair of geriatric muscle.
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Affiliation(s)
- Laura García-Prat
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain.,Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain.,Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Eusebio Perdiguero
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - Sonia Alonso-Martín
- Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain.,Neurosciences Area, Biodonostia Health Research Institute, Donostia-San Sebastián, San Sebastián, Spain
| | - Stefania Dell'Orso
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), NIH Bethesda, Bethesda, MD, USA
| | - Srikanth Ravichandran
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Stephen R Brooks
- Biodata Mining and Discovery Section, NIAMS, NIH Bethesda, Bethesda, MD, USA
| | - Aster H Juan
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), NIH Bethesda, Bethesda, MD, USA
| | - Silvia Campanario
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain.,Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain
| | - Kan Jiang
- Biodata Mining and Discovery Section, NIAMS, NIH Bethesda, Bethesda, MD, USA
| | - Xiaotong Hong
- Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain
| | - Laura Ortet
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - Vanessa Ruiz-Bonilla
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - Marta Flández
- Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain.,Grupo de Investigación en Oncología Clínico Traslacional, Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Victoria Moiseeva
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - Elena Rebollo
- Molecular Imaging Platform, Molecular Biology Institute of Barcelona (IBMB-CSIC), Barcelona, Spain
| | - Mercè Jardí
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain
| | - Hong-Wei Sun
- Biodata Mining and Discovery Section, NIAMS, NIH Bethesda, Bethesda, MD, USA
| | - Antonio Musarò
- DAHFMO-Unit of Histology and Medical Embryology, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, Rome, Italy
| | - Marco Sandri
- Department of Biomedical Science, University of Padova, Padova, Italy
| | - Antonio Del Sol
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg.,CIC bioGUNE, Derio, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Vittorio Sartorelli
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), NIH Bethesda, Bethesda, MD, USA.
| | - Pura Muñoz-Cánoves
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), Barcelona, Spain. .,Spanish National Center on Cardiovascular Research (CNIC), Madrid, Spain. .,ICREA, Barcelona, Spain.
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4
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Dobson SM, García-Prat L, Vanner RJ, Wintersinger J, Waanders E, Gu Z, McLeod J, Gan OI, Grandal I, Payne-Turner D, Edmonson MN, Ma X, Fan Y, Voisin V, Chan-Seng-Yue M, Xie SZ, Hosseini M, Abelson S, Gupta P, Rusch M, Shao Y, Olsen SR, Neale G, Chan SM, Bader G, Easton J, Guidos CJ, Danska JS, Zhang J, Minden MD, Morris Q, Mullighan CG, Dick JE. Relapse-Fated Latent Diagnosis Subclones in Acute B Lineage Leukemia Are Drug Tolerant and Possess Distinct Metabolic Programs. Cancer Discov 2020; 10:568-587. [PMID: 32086311 PMCID: PMC7122013 DOI: 10.1158/2159-8290.cd-19-1059] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/21/2019] [Accepted: 02/18/2020] [Indexed: 12/26/2022]
Abstract
Disease recurrence causes significant mortality in B-progenitor acute lymphoblastic leukemia (B-ALL). Genomic analysis of matched diagnosis and relapse samples shows relapse often arising from minor diagnosis subclones. However, why therapy eradicates some subclones while others survive and progress to relapse remains obscure. Elucidation of mechanisms underlying these differing fates requires functional analysis of isolated subclones. Here, large-scale limiting dilution xenografting of diagnosis and relapse samples, combined with targeted sequencing, identified and isolated minor diagnosis subclones that initiate an evolutionary trajectory toward relapse [termed diagnosis Relapse Initiating clones (dRI)]. Compared with other diagnosis subclones, dRIs were drug-tolerant with distinct engraftment and metabolic properties. Transcriptionally, dRIs displayed enrichment for chromatin remodeling, mitochondrial metabolism, proteostasis programs, and an increase in stemness pathways. The isolation and characterization of dRI subclones reveals new avenues for eradicating dRI cells by targeting their distinct metabolic and transcriptional pathways before further evolution renders them fully therapy-resistant. SIGNIFICANCE: Isolation and characterization of subclones from diagnosis samples of patients with B-ALL who relapsed showed that relapse-fated subclones had increased drug tolerance and distinct metabolic and survival transcriptional programs compared with other diagnosis subclones. This study provides strategies to identify and target clinically relevant subclones before further evolution toward relapse.
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Affiliation(s)
- Stephanie M Dobson
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Laura García-Prat
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Robert J Vanner
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | | | - Esmé Waanders
- Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands
- Department of Genetics, University Medical Center Utrecht, Utrecht, the Netherlands
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Zhaohui Gu
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Jessica McLeod
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Olga I Gan
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Ildiko Grandal
- Genetics and Genome Biology, Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
| | - Debbie Payne-Turner
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Michael N Edmonson
- Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Xiaotu Ma
- Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Yiping Fan
- Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Veronique Voisin
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Donnelly Centre for Cellular and Biomolecular Research, Toronto, Ontario, Canada
| | - Michelle Chan-Seng-Yue
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- PanCuRx Translational Research Initiative, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Stephanie Z Xie
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Mohsen Hosseini
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Sagi Abelson
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Pankaj Gupta
- Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Michael Rusch
- Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Ying Shao
- Pediatric Cancer Genome Project Laboratory, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Scott R Olsen
- Hartwell Center for Bioinformatics and Biotechnology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Geoffrey Neale
- Hartwell Center for Bioinformatics and Biotechnology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Steven M Chan
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Gary Bader
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Donnelly Centre for Cellular and Biomolecular Research, Toronto, Ontario, Canada
| | - John Easton
- Pediatric Cancer Genome Project Laboratory, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Cynthia J Guidos
- Developmental & Stem Cell Biology Program, Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Jayne S Danska
- Genetics and Genome Biology, Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Developmental & Stem Cell Biology Program, Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Jinghui Zhang
- Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Mark D Minden
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Quaid Morris
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Department of Computer Science, University of Toronto. Toronto, Ontario, Canada
- Donnelly Centre for Cellular and Biomolecular Research, Toronto, Ontario, Canada
- Vector Institute, Toronto, Canada
| | - Charles G Mullighan
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee.
| | - John E Dick
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
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5
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Abstract
Adult stem cells, particularly those resident in tissues with little turnover, are largely quiescent and only activate in response to regenerative demands, while embryonic stem cells continuously replicate, suggesting profoundly different regulatory mechanisms within distinct stem cell types. In recent years, evidence linking metabolism, mitochondrial dynamics, and protein homeostasis (proteostasis) as fundamental regulators of stem cell function has emerged. Here, we discuss new insights into how these networks control potency, self-renewal, differentiation, and aging of highly proliferative embryonic stem cells and quiescent adult stem cells, with a focus on hematopoietic and muscle stem cells and implications for anti-aging research.
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Affiliation(s)
- Laura García-Prat
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), E-08003 Barcelona, Spain; Spanish National Center on Cardiovascular Research (CNIC), E-28029 Madrid, Spain; Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 2M9, Canada
| | - Pedro Sousa-Victor
- Paul F. Glenn Center for Biology of Aging Research, Buck Institute for Research on Aging, Novato, CA 94945-1400, USA
| | - Pura Muñoz-Cánoves
- Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), E-08003 Barcelona, Spain; Spanish National Center on Cardiovascular Research (CNIC), E-28029 Madrid, Spain; ICREA, E-08010 Barcelona, Spain.
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6
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García-Prat L, Martínez-Vicente M, Muñoz-Cánoves P. Methods for Mitochondria and Mitophagy Flux Analyses in Stem Cells of Resting and Regenerating Skeletal Muscle. Methods Mol Biol 2018; 1460:223-40. [PMID: 27492176 DOI: 10.1007/978-1-4939-3810-0_16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mitochondria generate most of the cell's supply of ATP as a source of energy. They are also implicated in the control of cell's growth and death. Because of these critical functions, mitochondrial fitness is key for cellular homeostasis. Often, however, mitochondria become defective following damage or stress. To prevent accumulation of damaged mitochondria, the cells clear them through mitophagy, which is defined as the selective degradation of mitochondria by autophagy (the process for degradation of long-lived proteins and damaged organelles in lysosomes). Recently, constitutive mitophagic activity has been reported in quiescent muscle stem cells (satellite cells), which sustain regeneration of skeletal muscle. In response to muscle damage, these cells activate, expand, and differentiate to repair damaged myofibers. Mitophagy was shown to be required for maintenance of satellite cells in their healthy quiescent state. Conversely, damaged mitochondria accumulated in satellite cells with aging and this was attributed to defective mitophagy. This caused increased levels of reactive oxygen species (ROS) and loss of muscle stem cell regenerative capacity at old age. In this chapter, we describe different experimental strategies to evaluate mitochondria status and mitophagy in muscle stem cells from mice. They should improve our ability to study muscle stem homeostasis in adult life, and their loss of function in aging and disease.
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Affiliation(s)
- Laura García-Prat
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Plaça de la Mercè, 10, 08002, Barcelona, Spain
| | - Marta Martínez-Vicente
- Neurodegenerative Diseases Research Group, Vall d'Hebron Research Institute-CIBERNED, Mediterrania Building, Lab.102, Passeig de la Vall d'Hebron, 119-129, 08035, Barcelona, Spain.
| | - Pura Muñoz-Cánoves
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Plaça de la Mercè, 10, 08002, Barcelona, Spain.
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain.
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7
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Sousa-Victor P, García-Prat L, Muñoz-Cánoves P. New mechanisms driving muscle stem cell regenerative decline with aging. Int J Dev Biol 2018; 62:583-590. [DOI: 10.1387/ijdb.180041pm] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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Abstract
All tissues and organs undergo a progressive regenerative decline as they age. This decline has been mainly attributed to loss of stem cell number and/or function, and both stem cell-intrinsic changes and alterations in local niches and/or systemic environment over time are known to contribute to the stem cell aging phenotype. Advancing in the molecular understanding of the deterioration of stem cell cells with aging is key for targeting the specific causes of tissue regenerative dysfunction at advanced stages of life. Here, we revise exciting recent findings on why stem cells age and the consequences on tissue regeneration, with a special focus on regeneration of skeletal muscle. We also highlight newly identified common molecular pathways affecting diverse types of aging stem cells, such as altered proteostasis, metabolism, or senescence entry, and discuss the questions raised by these findings. Finally, we comment on emerging stem cell rejuvenation strategies, principally emanating from studies on muscle stem cells, which will surely burst tissue regeneration research for future benefit of the increasing human aging population.
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Affiliation(s)
- Laura García-Prat
- Tissue Regeneration Laboratory, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra; University (UPF) y CIBERNED, Barcelona, Spain
| | - Pura Muñoz-Cánoves
- Tissue Regeneration Laboratory, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra; University (UPF) y CIBERNED, Barcelona, Spain; ICREA, Barcelona, Spain.
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9
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Abstract
Autophagy is critical not only for the cell's adaptive response to starvation but also for cellular homeostasis, by acting as quality-control machinery for cytoplasmic components. This basal autophagic activity is particularly needed in postmitotic cells for survival maintenance. Recently, basal autophagic activity was reported in skeletal muscle stem cells (satellite cells) in their dormant quiescent state. Satellite cells are responsible for growth as well as for regeneration of muscle in response to stresses such as injury or disease. In the absence of stress, quiescence is the stem cell state of these cells throughout life, although which mechanisms maintain long-life quiescence remains largely unknown. Our recent findings showed that autophagy is necessary for quiescence maintenance in satellite cells and for retention of their regenerative functions. Importantly, damaged organelles and proteins accumulated in these cells with aging and this was connected to age-associated defective autophagy. Refueling of autophagy through genetic and pharmacological strategies restored aged satellite cell functions, and these finding have biomedical implications. In this chapter, we describe different experimental strategies to evaluate autophagic activity in satellite cells in resting muscle of mice. They should facilitate our competence to investigate stem cell functions both during tissue homeostasis as in pathological conditions.
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Affiliation(s)
- Laura García-Prat
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain
- Tissue Regeneration Laboratory. Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Pura Muñoz-Cánoves
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
- Tissue Regeneration Laboratory. Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Marta Martínez-Vicente
- Neurodegenerative Diseases Research Group, Vall d'Hebron Research Institute-CIBERNED, Barcelona, Spain.
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10
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Abstract
Regeneration of skeletal muscle relies on its resident stem cells, also known as satellite cells, which are normally quiescent. With aging, satellite cell quiescence is lost concomitant with a muscle regenerative decline. Here we demonstrate that autophagy sustains quiescence over time and that its failure with age drives senescence, which accounts for stem cell loss of function. Pharmacological and genetic reestablishment of autophagy restores homeostasis and regenerative functions in geriatric satellite cells, which has relevance for the elderly population.
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Affiliation(s)
- Laura García-Prat
- a Cell Biology Group , Department of Experimental and Health Sciences , Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED) , Barcelona , Spain
| | - Pura Muñoz-Cánoves
- a Cell Biology Group , Department of Experimental and Health Sciences , Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED) , Barcelona , Spain.,b Institució Catalana de Recerca i Estudis Avançats (ICREA) , Barcelona , Spain
| | - Marta Martinez-Vicente
- c Neurodegenerative Diseases Research Group, Vall d'Hebron Research Institute-CIBERNED , Barcelona , Spain
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11
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Sousa-Victor P, García-Prat L, Muñoz-Cánoves P. Dual mTORC1/C2 inhibitors: gerosuppressors with potential anti-aging effect. Oncotarget 2016; 6:23052-4. [PMID: 26375366 PMCID: PMC4695106 DOI: 10.18632/oncotarget.5563] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 08/19/2015] [Indexed: 12/13/2022] Open
Abstract
Over the past decade, our understanding of the molecular and cellular mechanisms presiding over cellular and tissue decline with aging has greatly advanced. Classical hallmarks of aging cell include increasing levels of reactive oxygen species, DNA damage and senescence entry, which disrupt tissue architecture and function. Tissue dysfunction with aging has been shown to correlate with a cellular switch from a G0 reversible quiescence state into a G0 irreversible senescence state (geroconversion), causing a permanent proliferative block. The TOR (target of rapamycin) kinase has been shown to promote geroconversion. Rapamycin and other rapalogs specifically suppress activity of the mammalian TOR (mTOR) complex 1 (mTORC1) -but not mTOR complex 2 (mTORC2)- and decrease senescence entry, thus preserving proliferative potential. In this perspective, we briefly comment recent progress of Leontieva and colleagues showing a new class of non-rapalog drugs that target simultaneously mTORC1 and mTORC2 and prevent geroconversion in a more efficient way than rapamycin. Its potential future use as rejuvenating, anti-aging therapeutics is therefore proposed.
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Affiliation(s)
- Pedro Sousa-Victor
- Buck Institute for Research on Aging, Novato, CA, USA.,Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), and ICREA, Barcelona, Spain
| | - Laura García-Prat
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), and ICREA, Barcelona, Spain
| | - Pura Muñoz-Cánoves
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative Diseases (CIBERNED), and ICREA, Barcelona, Spain
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García-Prat L, Martínez-Vicente M, Perdiguero E, Ortet L, Rodríguez-Ubreva J, Rebollo E, Ruiz-Bonilla V, Gutarra S, Ballestar E, Serrano AL, Sandri M, Muñoz-Cánoves P. Autophagy maintains stemness by preventing senescence. Nature 2016. [DOI: 10.1038/nature19415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sousa-Victor P, García-Prat L, Serrano AL, Perdiguero E, Muñoz-Cánoves P. Muscle stem cell aging: regulation and rejuvenation. Trends Endocrinol Metab 2015; 26:287-96. [PMID: 25869211 DOI: 10.1016/j.tem.2015.03.006] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/18/2015] [Accepted: 03/18/2015] [Indexed: 01/17/2023]
Abstract
Aging is characterized by a progressive decline of physiological integrity leading to the loss of tissue function and vulnerability to disease, but its causes remain poorly understood. Skeletal muscle has an outstanding regenerative capacity that relies on its resident stem cells (satellite cells). This capacity declines with aging, and recent discoveries have redefined our view of why this occurs. Here, we discuss how an interconnection of extrinsic changes in the systemic and local environment and cell-intrinsic mechanisms might provoke failure of normal muscle stem cell functions with aging. We focus particularly on the emergent biology of rejuvenation of old satellite cells, including cells of geriatric age, by restoring traits of youthfulness, with the final goal of improving human health during aging.
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Affiliation(s)
- Pedro Sousa-Victor
- Buck Institute for Research on Aging, Novato, CA, USA; Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain
| | - Laura García-Prat
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain
| | - Antonio L Serrano
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain
| | - Eusebio Perdiguero
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain
| | - Pura Muñoz-Cánoves
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain.
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14
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Sousa-Victor P, Gutarra S, García-Prat L, Rodriguez-Ubreva J, Ortet L, Ruiz-Bonilla V, Jardí M, Ballestar E, González S, Serrano AL, Perdiguero E, Muñoz-Cánoves P. Geriatric muscle stem cells switch reversible quiescence into senescence. Nature 2014; 506:316-21. [PMID: 24522534 DOI: 10.1038/nature13013] [Citation(s) in RCA: 644] [Impact Index Per Article: 64.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 01/10/2014] [Indexed: 02/06/2023]
Abstract
Regeneration of skeletal muscle depends on a population of adult stem cells (satellite cells) that remain quiescent throughout life. Satellite cell regenerative functions decline with ageing. Here we report that geriatric satellite cells are incapable of maintaining their normal quiescent state in muscle homeostatic conditions, and that this irreversibly affects their intrinsic regenerative and self-renewal capacities. In geriatric mice, resting satellite cells lose reversible quiescence by switching to an irreversible pre-senescence state, caused by derepression of p16(INK4a) (also called Cdkn2a). On injury, these cells fail to activate and expand, undergoing accelerated entry into a full senescence state (geroconversion), even in a youthful environment. p16(INK4a) silencing in geriatric satellite cells restores quiescence and muscle regenerative functions. Our results demonstrate that maintenance of quiescence in adult life depends on the active repression of senescence pathways. As p16(INK4a) is dysregulated in human geriatric satellite cells, these findings provide the basis for stem-cell rejuvenation in sarcopenic muscles.
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Affiliation(s)
- Pedro Sousa-Victor
- 1] Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain [2] Buck Institute for Research on Aging, Novato, California 94945, USA
| | - Susana Gutarra
- 1] Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain [2]
| | - Laura García-Prat
- 1] Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain [2]
| | - Javier Rodriguez-Ubreva
- Chromatin and Disease Group, Cancer Epigenetics and Biology Programme, Bellvitge Biomedical Research Institute, L'Hospitalet de Llobregat, E-08907 Barcelona, Spain
| | - Laura Ortet
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain
| | - Vanessa Ruiz-Bonilla
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain
| | - Mercè Jardí
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain
| | - Esteban Ballestar
- Chromatin and Disease Group, Cancer Epigenetics and Biology Programme, Bellvitge Biomedical Research Institute, L'Hospitalet de Llobregat, E-08907 Barcelona, Spain
| | - Susana González
- Stem Cell Aging Group, Centro Nacional de Investigaciones Cardiovasculares, E-28029 Madrid, Spain
| | - Antonio L Serrano
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain
| | - Eusebio Perdiguero
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain
| | - Pura Muñoz-Cánoves
- 1] Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University, CIBER on Neurodegenerative diseases, E-08003 Barcelona, Spain [2] Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain
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15
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García-Prat L, Sousa-Victor P, Muñoz-Cánoves P. Functional dysregulation of stem cells during aging: a focus on skeletal muscle stem cells. FEBS J 2013; 280:4051-62. [DOI: 10.1111/febs.12221] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/18/2013] [Accepted: 02/26/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Laura García-Prat
- Cell Biology Group; Department of Experimental and Health Sciences; Pompeu Fabra University (UPF); CIBER on Neurodegenerative Diseases (CIBERNED); Barcelona; Spain
| | - Pedro Sousa-Victor
- Cell Biology Group; Department of Experimental and Health Sciences; Pompeu Fabra University (UPF); CIBER on Neurodegenerative Diseases (CIBERNED); Barcelona; Spain
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