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Wheeler JR, Whitney ON, Vogler TO, Nguyen ED, Pawlikowski B, Lester E, Cutler A, Elston T, Dalla Betta N, Parker KR, Yost KE, Vogel H, Rando TA, Chang HY, Johnson AM, Parker R, Olwin BB. RNA-binding proteins direct myogenic cell fate decisions. eLife 2022; 11:e75844. [PMID: 35695839 PMCID: PMC9191894 DOI: 10.7554/elife.75844] [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] [Received: 11/26/2021] [Accepted: 05/20/2022] [Indexed: 11/13/2022] Open
Abstract
RNA-binding proteins (RBPs), essential for skeletal muscle regeneration, cause muscle degeneration and neuromuscular disease when mutated. Why mutations in these ubiquitously expressed RBPs orchestrate complex tissue regeneration and direct cell fate decisions in skeletal muscle remains poorly understood. Single-cell RNA-sequencing of regenerating Mus musculus skeletal muscle reveals that RBP expression, including the expression of many neuromuscular disease-associated RBPs, is temporally regulated in skeletal muscle stem cells and correlates with specific stages of myogenic differentiation. By combining machine learning with RBP engagement scoring, we discovered that the neuromuscular disease-associated RBP Hnrnpa2b1 is a differentiation-specifying regulator of myogenesis that controls myogenic cell fate transitions during terminal differentiation in mice. The timing of RBP expression specifies cell fate transitions by providing post-transcriptional regulation of messenger RNAs that coordinate stem cell fate decisions during tissue regeneration.
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Affiliation(s)
- Joshua R Wheeler
- Department of Biochemistry, University of ColoradoBoulderUnited States
- Medical Scientist Training Program, University of Colorado Anschutz Medical CampusAuroraUnited States
- Howard Hughes Medical Institute, University of ColoradoBoulderUnited States
- Department of Pathology, Stanford UniversityStanfordUnited States
- Department of Neuropathology, Stanford UniversityStanfordUnited States
| | - Oscar N Whitney
- Department of Molecular and Cell Biology, University of California, BerkeleyBerkeleyUnited States
| | - Thomas O Vogler
- Medical Scientist Training Program, University of Colorado Anschutz Medical CampusAuroraUnited States
- Department of Molecular, Cellular and Developmental Biology, University of ColoradoBoulderUnited States
- Department of Surgery, University of ColoradoAuroraUnited States
| | - Eric D Nguyen
- Medical Scientist Training Program, University of Colorado Anschutz Medical CampusAuroraUnited States
- Molecular Biology Program and Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical CampusAuroraUnited States
| | - Bradley Pawlikowski
- Department of Molecular, Cellular and Developmental Biology, University of ColoradoBoulderUnited States
| | - Evan Lester
- Department of Biochemistry, University of ColoradoBoulderUnited States
- Medical Scientist Training Program, University of Colorado Anschutz Medical CampusAuroraUnited States
| | - Alicia Cutler
- Department of Molecular, Cellular and Developmental Biology, University of ColoradoBoulderUnited States
| | - Tiffany Elston
- Department of Molecular, Cellular and Developmental Biology, University of ColoradoBoulderUnited States
| | - Nicole Dalla Betta
- Department of Molecular, Cellular and Developmental Biology, University of ColoradoBoulderUnited States
| | - Kevin R Parker
- Center for Personal and Dynamic Regulomes, Stanford UniversityPalo AltoUnited States
| | - Kathryn E Yost
- Center for Personal and Dynamic Regulomes, Stanford UniversityPalo AltoUnited States
| | - Hannes Vogel
- Department of Pathology, Stanford UniversityStanfordUnited States
| | - Thomas A Rando
- Department of Neurology and Neurological Sciences, Stanford University School of MedicineStanfordUnited States
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of MedicineStanfordUnited States
- Center for Tissue Regeneration, Repair, and Restoration, Veterans Affairs Palo Alto Health Care SystemPalo AltoUnited States
| | - Howard Y Chang
- Center for Personal and Dynamic Regulomes, Stanford UniversityPalo AltoUnited States
- Howard Hughes Medical Institute, Stanford UniversityStanfordUnited States
| | - Aaron M Johnson
- Molecular Biology Program and Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical CampusAuroraUnited States
- University of Colorado School of Medicine, RNA Bioscience Initiative, University of Colorado Anschutz Medical CampusAuroraUnited States
| | - Roy Parker
- Howard Hughes Medical Institute, University of ColoradoBoulderUnited States
| | - Bradley B Olwin
- Department of Molecular, Cellular and Developmental Biology, University of ColoradoBoulderUnited States
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Cutler AA, Pawlikowski B, Wheeler JR, Dalla Betta N, Elston T, O’Rourke R, Jones K, Olwin BB. The regenerating skeletal muscle niche drives satellite cell return to quiescence. iScience 2022; 25:104444. [PMID: 35733848 PMCID: PMC9207300 DOI: 10.1016/j.isci.2022.104444] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 04/27/2022] [Accepted: 05/16/2022] [Indexed: 11/27/2022] Open
Abstract
Skeletal muscle stem cells, or satellite cells (SCs), are essential to regenerate and maintain muscle. Quiescent SCs reside in an asymmetric niche between the basal lamina and myofiber membrane. To repair muscle, SCs activate, proliferate, and differentiate, fusing to repair myofibers or reacquiring quiescence to replenish the SC niche. Little is known about when SCs reacquire quiescence during regeneration or the cellular processes that direct SC fate decisions. We find that most SCs reacquire quiescence 5–10 days after muscle injury, following differentiation and fusion of most cells to regenerate myofibers. Single-cell sequencing of myogenic cells in regenerating muscle identifies SCs reacquiring quiescence and reveals that noncell autonomous signaling networks influence SC fate decisions during regeneration. SC transplantation experiments confirm that the regenerating environment influences SC fate. We define a window for SC repopulation of the niche, emphasizing the temporal contribution of the regenerative muscle environment on SC fate. Satellite cells primarily produce myonuclei in the first 4 days following injury Most satellite cells reacquire quiescence 5–7 days following injury Asymmetric division pathways are elevated in satellite cells reacquiring quiescence The regenerating muscle environment directs satellite cell fate decisions
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Affiliation(s)
- Alicia A. Cutler
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
| | - Bradley Pawlikowski
- Department of Pediatrics, Section of Developmental Biology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80217, USA
| | - Joshua R. Wheeler
- Departments of Pathology and Neuropathology, Stanford University, Palo Alto, CA 94305, USA
| | - Nicole Dalla Betta
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
| | - Tiffany Elston
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
| | - Rebecca O’Rourke
- Department of Pediatrics, Section of Developmental Biology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80217, USA
| | - Kenneth Jones
- Department of Pediatrics, Section of Developmental Biology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80217, USA
| | - Bradley B. Olwin
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA
- Corresponding author
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Derk J, Jones HE, Como C, Pawlikowski B, Siegenthaler JA. Corrigendum: Living on the Edge of the CNS: Meninges Cell Diversity in Health and Disease. Front Cell Neurosci 2021; 15:761506. [PMID: 34690706 PMCID: PMC8531747 DOI: 10.3389/fncel.2021.761506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 09/14/2021] [Indexed: 11/13/2022] Open
Abstract
[This corrects the article DOI: 10.3389/fncel.2021.703944.].
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Affiliation(s)
- Julia Derk
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
| | - Hannah E Jones
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States.,Cell Biology, Stem Cells and Development Graduate Program, University of Colorado, Anschutz Medical Campus, Aurora, CO, United States
| | - Christina Como
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States.,Neuroscience Graduate Program, University of Colorado, Aurora, CO, United States
| | - Bradley Pawlikowski
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
| | - Julie A Siegenthaler
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States.,Cell Biology, Stem Cells and Development Graduate Program, University of Colorado, Anschutz Medical Campus, Aurora, CO, United States.,Neuroscience Graduate Program, University of Colorado, Aurora, CO, United States
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Derk J, Jones HE, Como C, Pawlikowski B, Siegenthaler JA. Living on the Edge of the CNS: Meninges Cell Diversity in Health and Disease. Front Cell Neurosci 2021; 15:703944. [PMID: 34276313 PMCID: PMC8281977 DOI: 10.3389/fncel.2021.703944] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 06/08/2021] [Indexed: 12/30/2022] Open
Abstract
The meninges are the fibrous covering of the central nervous system (CNS) which contain vastly heterogeneous cell types within its three layers (dura, arachnoid, and pia). The dural compartment of the meninges, closest to the skull, is predominantly composed of fibroblasts, but also includes fenestrated blood vasculature, an elaborate lymphatic system, as well as immune cells which are distinct from the CNS. Segregating the outer and inner meningeal compartments is the epithelial-like arachnoid barrier cells, connected by tight and adherens junctions, which regulate the movement of pathogens, molecules, and cells into and out of the cerebral spinal fluid (CSF) and brain parenchyma. Most proximate to the brain is the collagen and basement membrane-rich pia matter that abuts the glial limitans and has recently be shown to have regional heterogeneity within the developing mouse brain. While the meninges were historically seen as a purely structural support for the CNS and protection from trauma, the emerging view of the meninges is as an essential interface between the CNS and the periphery, critical to brain development, required for brain homeostasis, and involved in a variety of diseases. In this review, we will summarize what is known regarding the development, specification, and maturation of the meninges during homeostatic conditions and discuss the rapidly emerging evidence that specific meningeal cell compartments play differential and important roles in the pathophysiology of a myriad of diseases including: multiple sclerosis, dementia, stroke, viral/bacterial meningitis, traumatic brain injury, and cancer. We will conclude with a list of major questions and mechanisms that remain unknown, the study of which represent new, future directions for the field of meninges biology.
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Affiliation(s)
- Julia Derk
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
| | - Hannah E. Jones
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
- Cell Biology, Stem Cells and Development Graduate Program, University of Colorado, Anschutz Medical Campus, Aurora, CO, United States
| | - Christina Como
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
- Neuroscience Graduate Program, University of Colorado, Aurora, CO, United States
| | - Bradley Pawlikowski
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
| | - Julie A. Siegenthaler
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
- Cell Biology, Stem Cells and Development Graduate Program, University of Colorado, Anschutz Medical Campus, Aurora, CO, United States
- Neuroscience Graduate Program, University of Colorado, Aurora, CO, United States
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DeSisto J, O'Rourke R, Jones HE, Pawlikowski B, Malek AD, Bonney S, Guimiot F, Jones KL, Siegenthaler JA. Single-Cell Transcriptomic Analyses of the Developing Meninges Reveal Meningeal Fibroblast Diversity and Function. Dev Cell 2021; 54:43-59.e4. [PMID: 32634398 DOI: 10.1016/j.devcel.2020.06.009] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 03/18/2020] [Accepted: 06/01/2020] [Indexed: 01/18/2023]
Abstract
The meninges are a multilayered structure composed of fibroblasts, blood and lymphatic vessels, and immune cells. Meningeal fibroblasts secrete a variety of factors that control CNS development, yet strikingly little is known about their heterogeneity or development. Using single-cell sequencing, we report distinct transcriptional signatures for fibroblasts in the embryonic dura, arachnoid, and pia. We define new markers for meningeal layers and show conservation in human meninges. We find that embryonic meningeal fibroblasts are transcriptionally distinct between brain regions and identify a regionally localized pial subpopulation marked by the expression of μ-crystallin. Developmental analysis reveals a progressive, ventral-to-dorsal maturation of telencephalic meninges. Our studies have generated an unparalleled view of meningeal fibroblasts, providing molecular profiles of embryonic meningeal fibroblasts by layer and yielding insights into the mechanisms of meninges development and function.
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Affiliation(s)
- John DeSisto
- Department of Pediatrics Section of Hematology, Oncology, Bone Marrow Transplant, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Cell Biology, Stem Cells and Development Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Rebecca O'Rourke
- Department of Pediatrics Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Hannah E Jones
- Department of Pediatrics Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Cell Biology, Stem Cells and Development Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Bradley Pawlikowski
- Department of Pediatrics Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Alexandra D Malek
- Department of Pediatrics Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Stephanie Bonney
- Department of Pediatrics Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Cell Biology, Stem Cells and Development Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Fabien Guimiot
- INSERM UMR 1141, Hôpital Robert Debré, 75019 Paris, France
| | - Kenneth L Jones
- Department of Pediatrics Section of Hematology, Oncology, Bone Marrow Transplant, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Julie A Siegenthaler
- Department of Pediatrics Section of Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Cell Biology, Stem Cells and Development Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
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Pawlikowski B, Vogler TO, Gadek K, Olwin BB. Regulation of skeletal muscle stem cells by fibroblast growth factors. Dev Dyn 2017; 246:359-367. [PMID: 28249356 DOI: 10.1002/dvdy.24495] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/16/2017] [Accepted: 02/16/2017] [Indexed: 01/04/2023] Open
Abstract
Fibroblast growth factors (FGFs) are essential for self-renewal of skeletal muscle stem cells (satellite cells) and required for maintenance and repair of skeletal muscle. Satellite cells express high levels of FGF receptors 1 and 4, low levels of FGF receptor 3, and little or no detectable FGF receptor 2. Of the multiple FGFs that influence satellite cell function in culture, FGF2 and FGF6 are the only members that regulate satellite cell function in vivo by activating ERK MAPK, p38α/β MAPKs, PI3 kinase, PLCγ and STATs. Regulation of FGF signaling is complex in satellite cells, requiring Syndecan-4, a heparan sulfate proteoglycan, as well as ß1-integrin and fibronectin. During aging, reduced responsiveness to FGF diminishes satellite cell self-renewal, leading to impaired skeletal muscle regeneration and depletion of satellite cells. Mislocalization of ß1-integrin, reductions in fibronectin, and alterations in heparan sulfate content all contribute to reduced FGF responsiveness in satellite cells. How these cell surface proteins regulate satellite cell self-renewal is incompletely understood. Here we summarize the current knowledge, highlighting the role(s) for FGF signaling in skeletal muscle regeneration, satellite cell behavior, and age-induced muscle wasting. Developmental Dynamics 246:359-367, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Bradley Pawlikowski
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado
| | - Thomas Orion Vogler
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado
| | - Katherine Gadek
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado
| | - Bradley B Olwin
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, Colorado
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Pawlikowski B, Pulliam C, Betta ND, Kardon G, Olwin BB. Pervasive satellite cell contribution to uninjured adult muscle fibers. Skelet Muscle 2015; 5:42. [PMID: 26668715 PMCID: PMC4677447 DOI: 10.1186/s13395-015-0067-1] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 11/04/2015] [Indexed: 12/22/2022] Open
Abstract
Background Adult skeletal muscle adapts to functional needs, maintaining consistent numbers of myonuclei and stem cells. Although resident muscle stem cells or satellite cells are required for muscle growth and repair, in uninjured muscle, these cells appear quiescent and metabolically inactive. To investigate the satellite cell contribution to myofibers in adult uninjured skeletal muscle, we labeled satellite cells by inducing a recombination of LSL-tdTomato in Pax7CreER mice and scoring tdTomato+ myofibers as an indicator of satellite cell fusion. Results Satellite cell fusion into myofibers plateaus postnatally between 8 and 12 weeks of age, reaching a steady state in hindlimb muscles, but in extra ocular or diaphragm muscles, satellite cell fusion is maintained at postnatal levels irrespective of the age assayed. Upon recombination and following a 2-week chase in 6-month-old mice, tdTomato-labeled satellite cells fused into myofibers as 20, 50, and 80 % of hindlimb, extra ocular, and diaphragm myofibers, respectively, were tdTomato+. Satellite cells contribute to uninjured myofibers either following a cell division or directly without an intervening cell division. Conclusions The frequency of satellite cell fusion into the skeletal muscle fibers is greater than previously estimated, suggesting an important functional role for satellite cell fusion into adult myofibers and a requirement for active maintenance of satellite cell numbers in uninjured skeletal muscle.
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Affiliation(s)
- Bradley Pawlikowski
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, 347 UCB, Boulder, CO 80039 USA
| | - Crystal Pulliam
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, 347 UCB, Boulder, CO 80039 USA
| | - Nicole Dalla Betta
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, 347 UCB, Boulder, CO 80039 USA
| | - Gabrielle Kardon
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, 347 UCB, Boulder, CO 80039 USA
| | - Bradley B Olwin
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, 347 UCB, Boulder, CO 80039 USA
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Chen L, Pawlikowski B, Schlessinger A, More SS, Stryke D, Johns SJ, Portman MA, Chen E, Ferrin TE, Sali A, Giacomini KM. Role of organic cation transporter 3 (SLC22A3) and its missense variants in the pharmacologic action of metformin. Pharmacogenet Genomics 2010; 20:687-99. [PMID: 20859243 PMCID: PMC2976715 DOI: 10.1097/fpc.0b013e32833fe789] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [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] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The goals of this study were to determine the role of organic cation transporter 3 (OCT3) in the pharmacological action of metformin and to identify and functionally characterize genetic variants of OCT3 with respect to the uptake of metformin and monoamines. METHODS For pharmacological studies, we evaluated metformin-induced activation of AMP-activated protein kinase, a molecular target of metformin. We used quantitative PCR and immunostaining to localize the transporter and isotopic uptake studies in cells transfected with OCT3 and its nonsynonymous genetic variants for functional analyses. RESULTS Quantitative PCR and immunostaining showed that OCT3 was expressed high on the plasma membrane of skeletal muscle and liver, target tissues for metformin action. Both the OCT inhibitor, cimetidine, and OCT3-specific short hairpin RNA significantly reduced the activating effect of metformin on AMP-activated protein kinase. To identify genetic variants in OCT3, we used recent data from the 1000 Genomes and the Pharmacogenomics of Membrane Transporters projects. Six novel missense variants were identified. In functional assays, using various monoamines and metformin, three variants, T44M (c.131C>T), T400I (c.1199C>T) and V423F (c.1267G>T) showed altered substrate specificity. Notably, in cells expressing T400I and V423F, the uptakes of metformin and catecholamines were significantly reduced, but the uptakes of metformin, 1-methyl-4-phenylpyridinium and histamine by T44M were significantly increased more than 50%. Structural modeling suggested that these two variants may be located in the pore lining (T400) or proximal (V423) membrane-spanning helixes. CONCLUSION Our study suggests that OCT3 plays a role in the therapeutic action of metformin and that genetic variants of OCT3 may modulate metformin and catecholamine action.
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Affiliation(s)
- Ligong Chen
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
| | - Bradley Pawlikowski
- Department of Cell and Tissue Biology, University of California at San Francisco, San Francisco, California 94143
| | - Avner Schlessinger
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
| | - Swati S. More
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
| | - Doug Stryke
- Department of Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, California 94143
| | - Susan J. Johns
- Department of Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, California 94143
| | - Michael A. Portman
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
| | - Eugene Chen
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
| | - Thomas E. Ferrin
- Department of Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, California 94143
| | - Andrej Sali
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
| | - Kathleen M. Giacomini
- Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, California 94143
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Pawlikowski B, Lee L, Zuo J, Kramer RH. Analysis of human muscle stem cells reveals a differentiation-resistant progenitor cell population expressing Pax7 capable of self-renewal. Dev Dyn 2009; 238:138-49. [PMID: 19097049 DOI: 10.1002/dvdy.21833] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Studies using mouse models have established a critical role for resident satellite stem cells in skeletal muscle development and regeneration, but little is known about this paradigm in human muscle. Here, using human muscle stem cells, we address their lineage progression, differentiation, migration, and self-renewal. Isolated human satellite cells expressed alpha7-integrin and other definitive muscle markers, were highly motile on laminin substrates and could undergo efficient myotube differentiation and myofibrillogenesis. However, only a subpopulation of the myoblasts expressed Pax7 and displayed a variable lineage progression as measured by desmin and MyoD expression. Analysis identified a differentiation-resistant progenitor cell population that was Pax7+/desmin- and capable of self-renewal. This study extends our understanding of the role of Pax7 in regulating human satellite stem cell differentiation and self-renewal.
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Affiliation(s)
- Bradley Pawlikowski
- Department of Cell and Tissue Biology, University of California San Francisco, School of Dentistry, San Francisco, California 94143, USA.
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