1
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Zhu P, Peek CB. Circadian timing of satellite cell function and muscle regeneration. Curr Top Dev Biol 2024; 158:307-339. [PMID: 38670711 DOI: 10.1016/bs.ctdb.2024.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Recent research has highlighted an important role for the molecular circadian machinery in the regulation of tissue-specific function and stress responses. Indeed, disruption of circadian function, which is pervasive in modern society, is linked to accelerated aging, obesity, and type 2 diabetes. Furthermore, evidence supporting the importance of the circadian clock within both the mature muscle tissue and satellite cells to regulate the maintenance of muscle mass and repair capacity in response injury has recently emerged. Here, we review the discovery of circadian clocks within the satellite cell (a.k.a. adult muscle stem cell) and how they act to regulate metabolism, epigenetics, and myogenesis during both healthy and diseased states.
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Affiliation(s)
- Pei Zhu
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Department of Medicine-Endocrinology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States.
| | - Clara B Peek
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Department of Medicine-Endocrinology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States.
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2
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Liu Q, Sheng N, Zhang Z, He C, Zhao Y, Sun H, Chen J, Yang X, Tang C. Initial nutrient condition determines the recovery speed of quiescent cells in fission yeast. Heliyon 2024; 10:e26558. [PMID: 38455543 PMCID: PMC10918017 DOI: 10.1016/j.heliyon.2024.e26558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 02/10/2024] [Accepted: 02/15/2024] [Indexed: 03/09/2024] Open
Abstract
Most of microbe cells spend the majority of their times in quiescence due to unfavorable environmental conditions. The study of this dominant state is crucial for understanding the basic cell physiology. Retained recovery ability is a critical property of quiescent cells, which consists of two features: how long the cells can survive (the survivability) and how fast they can recover (the recovery activity). While the survivability has been extensively studied under the background of chronological aging, how the recovery activity depends on the quiescent time and what factors influence its dynamics have not been addressed quantitatively. In this work, we systematically quantified both the survivability and the recovery activity of long-lived quiescent fission yeast cells at the single cell level under various nutrient conditions. It provides the most profound evolutionary dynamics of quiescent cell regeneration ability described to date. We found that the single cell recovery time linearly increased with the starvation time before the survivability significantly declined. This linearity was robust under various nutrient conditions and the recovery speed was predetermined by the initial nutrient condition. Transcriptome profiling further revealed that quiescence states under different nutrient conditions evolve in a common trajectory but with different speed. Our results demonstrated that cellular quiescence has a continuous spectrum of depths and its physiology is greatly influenced by environmental conditions.
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Affiliation(s)
- Qi Liu
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- The Key Laboratory of Cell Proliferation and Differentiation of Ministry of Education, School of Life Sciences, Peking University, Beijing, 100871, China
| | - Nan Sheng
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Zhiwen Zhang
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Chenjun He
- College of Life Science and Technology, Huazhong Agriculture University, Wuhan, 430070, China
| | - Yao Zhao
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Haoyuan Sun
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Jianguo Chen
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- The Key Laboratory of Cell Proliferation and Differentiation of Ministry of Education, School of Life Sciences, Peking University, Beijing, 100871, China
| | - Xiaojing Yang
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Chao Tang
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- School of Physics, Peking University, Beijing, 100871, China
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3
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Potes Y, Bermejo-Millo JC, Mendes C, Castelão-Baptista JP, Díaz-Luis A, Pérez-Martínez Z, Solano JJ, Sardão VA, Oliveira PJ, Caballero B, Coto-Montes A, Vega-Naredo I. p66Shc signaling and autophagy impact on C2C12 myoblast differentiation during senescence. Cell Death Dis 2024; 15:200. [PMID: 38459002 PMCID: PMC10923948 DOI: 10.1038/s41419-024-06582-0] [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: 08/02/2022] [Revised: 02/23/2024] [Accepted: 03/01/2024] [Indexed: 03/10/2024]
Abstract
During aging, muscle regenerative capacities decline, which is concomitant with the loss of satellite cells that enter in a state of irreversible senescence. However, what mechanisms are involved in myogenic senescence and differentiation are largely unknown. Here, we showed that early-passage or "young" C2C12 myoblasts activated the redox-sensitive p66Shc signaling pathway, exhibited a strong antioxidant protection and a bioenergetic profile relying predominantly on OXPHOS, responses that decrease progressively during differentiation. Furthermore, autophagy was increased in myotubes. Otherwise, late-passage or "senescent" myoblasts led to a highly metabolic profile, relying on both OXPHOS and glycolysis, that may be influenced by the loss of SQSTM1/p62 which tightly regulates the metabolic shift from aerobic glycolysis to OXPHOS. Furthermore, during differentiation of late-passage C2C12 cells, both p66Shc signaling and autophagy were impaired and this coincides with reduced myogenic capacity. Our findings recognized that the lack of p66Shc compromises the proliferation and the onset of the differentiation of C2C12 myoblasts. Moreover, the Atg7 silencing favored myoblasts growth, whereas interfered in the viability of differentiated myotubes. Then, our work demonstrates that the p66Shc signaling pathway, which highly influences cellular metabolic status and oxidative environment, is critical for the myogenic commitment and differentiation of C2C12 cells. Our findings also support that autophagy is essential for the metabolic switch observed during the differentiation of C2C12 myoblasts, confirming how its regulation determines cell fate. The regulatory roles of p66Shc and autophagy mechanisms on myogenesis require future attention as possible tools that could predict and measure the aging-related state of frailty and disability.
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Affiliation(s)
- Yaiza Potes
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain.
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), Oviedo, Spain.
| | - Juan C Bermejo-Millo
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), Oviedo, Spain
| | - Catarina Mendes
- CNC-UC, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- CIBB, Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - José P Castelão-Baptista
- CNC-UC, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- CIBB, Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- PDBEB - Doctoral Program in Experimental Biology and Biomedicine, Institute of Interdisciplinary Research, University of Coimbra, Coimbra, Portugal
| | - Andrea Díaz-Luis
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
| | - Zulema Pérez-Martínez
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
- Microbiology service, University Central Hospital of Asturias, Oviedo, Spain
| | - Juan J Solano
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
- Geriatric Service, Monte Naranco Hospital, Av. Doctores Fernández Vega, Oviedo, Spain
| | - Vilma A Sardão
- CIBB, Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
- MIA-Portugal - Multidisciplinary Institute of Ageing, University of Coimbra, Coimbra, Portugal
| | - Paulo J Oliveira
- CNC-UC, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- CIBB, Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - Beatriz Caballero
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), Oviedo, Spain
| | - Ana Coto-Montes
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), Oviedo, Spain
| | - Ignacio Vega-Naredo
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain.
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain.
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), Oviedo, Spain.
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4
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Jackson BT, Finley LWS. Metabolic regulation of the hallmarks of stem cell biology. Cell Stem Cell 2024; 31:161-180. [PMID: 38306993 PMCID: PMC10842269 DOI: 10.1016/j.stem.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 02/04/2024]
Abstract
Stem cells perform many different functions, each of which requires specific metabolic adaptations. Over the past decades, studies of pluripotent and tissue stem cells have uncovered a range of metabolic preferences and strategies that correlate with or exert control over specific cell states. This review aims to describe the common themes that emerge from the study of stem cell metabolism: (1) metabolic pathways supporting stem cell proliferation, (2) metabolic pathways maintaining stem cell quiescence, (3) metabolic control of cellular stress responses and cell death, (4) metabolic regulation of stem cell identity, and (5) metabolic requirements of the stem cell niche.
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Affiliation(s)
- Benjamin T Jackson
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA; Louis V. Gerstner Jr. Graduate School of Biomedical Sciences, New York, NY, USA
| | - Lydia W S Finley
- Cell Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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5
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Agarwala S, Dhabal S, Mitra K. Significance of quantitative analyses of the impact of heterogeneity in mitochondrial content and shape on cell differentiation. Open Biol 2024; 14:230279. [PMID: 38228170 PMCID: PMC10791538 DOI: 10.1098/rsob.230279] [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: 08/13/2023] [Accepted: 12/15/2023] [Indexed: 01/18/2024] Open
Abstract
Mitochondria, classically known as the powerhouse of cells, are unique double membrane-bound multifaceted organelles carrying a genome. Mitochondrial content varies between cell types and precisely doubles within cells during each proliferating cycle. Mitochondrial content also increases to a variable degree during cell differentiation triggered after exit from the proliferating cycle. The mitochondrial content is primarily maintained by the regulation of mitochondrial biogenesis, while damaged mitochondria are eliminated from the cells by mitophagy. In any cell with a given mitochondrial content, the steady-state mitochondrial number and shape are determined by a balance between mitochondrial fission and fusion processes. The increase in mitochondrial content and alteration in mitochondrial fission and fusion are causatively linked with the process of differentiation. Here, we critically review the quantitative aspects in the detection methods of mitochondrial content and shape. Thereafter, we quantitatively link these mitochondrial properties in differentiating cells and highlight the implications of such quantitative link on stem cell functionality. Finally, we discuss an example of cell size regulation predicted from quantitative analysis of mitochondrial shape and content. To highlight the significance of quantitative analyses of these mitochondrial properties, we propose three independent rationale based hypotheses and the relevant experimental designs to test them.
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Affiliation(s)
- Swati Agarwala
- Department of Biology, Ashoka University, Delhi (NCR), India
| | - Sukhamoy Dhabal
- Department of Biology, Ashoka University, Delhi (NCR), India
| | - Kasturi Mitra
- Department of Biology, Ashoka University, Delhi (NCR), India
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
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6
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Milián L, Molina P, Oliver-Ferrándiz M, Fernández-Sellers C, Monzó A, Sánchez-Sánchez R, Braza-Boils A, Mata M, Zorio E. Cadaveric Adipose-Derived Stem Cells for Regenerative Medicine and Research. Int J Mol Sci 2023; 24:15696. [PMID: 37958680 PMCID: PMC10647636 DOI: 10.3390/ijms242115696] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Advances in regenerative medicine have enabled the search for new solutions to current health problems in so far unexplored fields. Thus, we focused on cadaveric subcutaneous fat as a promising source of adipose-derived stem cells (ADSCs) that have potential to differentiate into different cell lines. With this aim, we isolated and characterized ADSCs from cadaveric samples with a postmortem interval ranging from 30 to 55 h and evaluated their ability to differentiate into chondrocytes or osteocytes. A commercial ADSC line was used as reference. Morphological and protein expression analyses were used to confirm the final stage of differentiation. Eight out of fourteen samples from patients were suitable to complete the whole protocol. Cadaveric ADSCs exhibited features of stem cells based upon several markers: CD29 (84.49 ± 14.07%), CD105 (94.38 ± 2.09%), and CD44 (99.77 ± 0.32%). The multiparametric assessment of differentiation confirmed the generation of stable lines of chondrocytes and osteocytes. In conclusion, we provide evidence supporting the feasibility of obtaining viable postmortem human subcutaneous fat ADSCs with potential application in tissue engineering and research fields.
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Affiliation(s)
- Lara Milián
- Department of Pathology, Faculty of Medicine and Dentistry, Universitat de València, 46010 Valencia, Spain; (L.M.)
- INCLIVA Biomedical Research Institute, 46010 Valencia, Spain
| | - Pilar Molina
- Department of Pathology, Instituto de Medicina Legal y Ciencias Forenses, 46010 Valencia, Spain; (P.M.); (C.F.-S.); (A.M.)
- CAFAMUSME Research Group, Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain; (R.S.-S.); (A.B.-B.); (E.Z.)
| | - María Oliver-Ferrándiz
- Department of Pathology, Faculty of Medicine and Dentistry, Universitat de València, 46010 Valencia, Spain; (L.M.)
| | - Carlos Fernández-Sellers
- Department of Pathology, Instituto de Medicina Legal y Ciencias Forenses, 46010 Valencia, Spain; (P.M.); (C.F.-S.); (A.M.)
- CAFAMUSME Research Group, Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain; (R.S.-S.); (A.B.-B.); (E.Z.)
| | - Ana Monzó
- Department of Pathology, Instituto de Medicina Legal y Ciencias Forenses, 46010 Valencia, Spain; (P.M.); (C.F.-S.); (A.M.)
- CAFAMUSME Research Group, Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain; (R.S.-S.); (A.B.-B.); (E.Z.)
| | - Rafael Sánchez-Sánchez
- CAFAMUSME Research Group, Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain; (R.S.-S.); (A.B.-B.); (E.Z.)
| | - Aitana Braza-Boils
- CAFAMUSME Research Group, Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain; (R.S.-S.); (A.B.-B.); (E.Z.)
- CIBERCV, Center for Biomedical Network Research on Cardiovascular Diseases, 28015 Madrid, Spain
| | - Manuel Mata
- Department of Pathology, Faculty of Medicine and Dentistry, Universitat de València, 46010 Valencia, Spain; (L.M.)
- INCLIVA Biomedical Research Institute, 46010 Valencia, Spain
| | - Esther Zorio
- CAFAMUSME Research Group, Instituto de Investigación Sanitaria La Fe, 46026 Valencia, Spain; (R.S.-S.); (A.B.-B.); (E.Z.)
- CIBERCV, Center for Biomedical Network Research on Cardiovascular Diseases, 28015 Madrid, Spain
- Inherited Cardiac Diseases Unit, Cardiology Department, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain
- Department of Medicine, Faculty of Medicine and Dentistry, Universitat de València, 46010 Valencia, Spain
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7
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F AR, Quadrilatero J. Emerging role of mitophagy in myoblast differentiation and skeletal muscle remodeling. Semin Cell Dev Biol 2023; 143:54-65. [PMID: 34924331 DOI: 10.1016/j.semcdb.2021.11.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/26/2021] [Accepted: 11/30/2021] [Indexed: 12/17/2022]
Abstract
Mitochondrial turnover in the form of mitophagy is emerging as a central process in maintaining cellular function. The degradation of damaged mitochondria through mitophagy is particularly important in cells/tissues that exhibit high energy demands. Skeletal muscle is one such tissue that requires precise turnover of mitochondria in several conditions in order to optimize energy production and prevent bioenergetic crisis. For instance, the formation of skeletal muscle (i.e., myogenesis) is accompanied by robust turnover of low-functioning mitochondria to eventually allow the formation of high-functioning mitochondria. In mature skeletal muscle, alterations in mitophagy-related signaling occur during exercise, aging, and various disease states. Nonetheless, several questions regarding the direct role of mitophagy in various skeletal muscle conditions remain unknown. Furthermore, given the heterogenous nature of skeletal muscle with respect to various cellular and molecular properties, and the plasticity in these properties in various conditions, the involvement and characterization of mitophagy requires more careful consideration in this tissue. Therefore, this review will highlight the known mechanisms of mitophagy in skeletal muscle, and discuss their involvement during myogenesis and various skeletal muscle conditions. This review also provides important considerations for the accurate measurement of mitophagy and interpretation of data in skeletal muscle.
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Affiliation(s)
- Ahmad Rahman F
- Department of Kinesiology & Health Sciences, University of Waterloo, Waterloo, ON, Canada
| | - Joe Quadrilatero
- Department of Kinesiology & Health Sciences, University of Waterloo, Waterloo, ON, Canada.
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8
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de Morree A, Rando TA. Regulation of adult stem cell quiescence and its functions in the maintenance of tissue integrity. Nat Rev Mol Cell Biol 2023; 24:334-354. [PMID: 36922629 PMCID: PMC10725182 DOI: 10.1038/s41580-022-00568-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2022] [Indexed: 03/18/2023]
Abstract
Adult stem cells are important for mammalian tissues, where they act as a cell reserve that supports normal tissue turnover and can mount a regenerative response following acute injuries. Quiescent stem cells are well established in certain tissues, such as skeletal muscle, brain, and bone marrow. The quiescent state is actively controlled and is essential for long-term maintenance of stem cell pools. In this Review, we discuss the importance of maintaining a functional pool of quiescent adult stem cells, including haematopoietic stem cells, skeletal muscle stem cells, neural stem cells, hair follicle stem cells, and mesenchymal stem cells such as fibro-adipogenic progenitors, to ensure tissue maintenance and repair. We discuss the molecular mechanisms that regulate the entry into, maintenance of, and exit from the quiescent state in mice. Recent studies revealed that quiescent stem cells have a discordance between RNA and protein levels, indicating the importance of post-transcriptional mechanisms, such as alternative polyadenylation, alternative splicing, and translation repression, in the control of stem cell quiescence. Understanding how these mechanisms guide stem cell function during homeostasis and regeneration has important implications for regenerative medicine.
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Affiliation(s)
- Antoine de Morree
- Department of Neurology and Neurological Science, Stanford University School of Medicine, Stanford, CA, USA.
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.
| | - Thomas A Rando
- Department of Neurology and Neurological Science, Stanford University School of Medicine, Stanford, CA, USA.
- Paul F. Glenn Center for the Biology of Aging, Stanford University School of Medicine, Stanford, CA, USA.
- Center for Tissue Regeneration, Repair, and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA.
- Broad Stem Cell Research Center, University of California, Los Angeles, Los Angeles, CA, USA.
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9
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Chatzinikita E, Maridaki M, Palikaras K, Koutsilieris M, Philippou A. The Role of Mitophagy in Skeletal Muscle Damage and Regeneration. Cells 2023; 12:716. [PMID: 36899852 PMCID: PMC10000750 DOI: 10.3390/cells12050716] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/18/2023] [Accepted: 02/22/2023] [Indexed: 02/26/2023] Open
Abstract
Mitochondria are cellular organelles that play an essential role in generating the chemical energy needed for the biochemical reactions in cells. Mitochondrial biogenesis, i.e., de novo mitochondria formation, results in enhanced cellular respiration, metabolic processes, and ATP generation, while autophagic clearance of mitochondria (mitophagy) is required to remove damaged or useless mitochondria. The balance between the opposing processes of mitochondrial biogenesis and mitophagy is highly regulated and crucial for the maintenance of the number and function of mitochondria as well as for the cellular homeostasis and adaptations to metabolic demands and extracellular stimuli. In skeletal muscle, mitochondria are essential for maintaining energy homeostasis, and the mitochondrial network exhibits complex behaviors and undergoes dynamic remodeling in response to various conditions and pathologies characterized by changes in muscle cell structure and metabolism, such as exercise, muscle damage, and myopathies. In particular, the involvement of mitochondrial remodeling in mediating skeletal muscle regeneration following damage has received increased attention, as modifications in mitophagy-related signals arise from exercise, while variations in mitochondrial restructuring pathways can lead to partial regeneration and impaired muscle function. Muscle regeneration (through myogenesis) following exercise-induced damage is characterized by a highly regulated, rapid turnover of poor-functioning mitochondria, permitting the synthesis of better-functioning mitochondria to occur. Nevertheless, essential aspects of mitochondrial remodeling during muscle regeneration remain poorly understood and warrant further characterization. In this review, we focus on the critical role of mitophagy for proper muscle cell regeneration following damage, highlighting the molecular mechanisms of the mitophagy-associated mitochondrial dynamics and network reformation.
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Affiliation(s)
- Eirini Chatzinikita
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece
| | - Maria Maridaki
- Faculty of Physical Education and Sport Science, National and Kapodistrian University of Athens, 172 37 Athens, Greece
| | - Konstantinos Palikaras
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece
| | - Michael Koutsilieris
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece
| | - Anastassios Philippou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece
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10
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Kreitmair K. Why We Still Need a Substantive Determination of Death. THE AMERICAN JOURNAL OF BIOETHICS : AJOB 2023; 23:55-57. [PMID: 36681914 DOI: 10.1080/15265161.2022.2159583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
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11
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Examination of Postmortem β-Hydroxybutyrate Increase in Forensic Autopsy Cases. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12147181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Ketoacidosis is one of the common diseases that sometimes result in death. In forensic autopsy cases, the measuring of ketone bodies, especially β-hydroxybutyrate (BHB), is useful in diagnosing postmortem ketoacidosis as a cause of death. However, increased BHB values are not always indicative of ketoacidosis. Other causes of death, such as hypothermia, are known to increase BHB values. In addition, sometimes, we experience cases of increased BHB values that are unlikely to be associated with the pathophysiology or the cause of death resulting in an increase in BHB values. In this study, autopsies were performed to determine the relationship between blood BHB values and the postmortem interval (PMI). The patients were divided into four groups: PMI ≤ 24 h, PMI ≤ 48 h, PMI ≤ 72 h, and PMI > 72 h. The BHB values for each group were then compared. Based on the analysis, patients with a PMI ≤ 72 h and those with a PMI > 72 h had significantly higher BHB values than patients with a PMI ≤ 24 h. In conclusion, there remains a possibility that the BHB values increase after death. Forensic pathologists should consider PMI when diagnosing ketoacidosis as the cause of death.
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12
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Hashchyshyn V, Tymochko-Voloshyn R, Paraniak N, Vovkanych L, Hlozhyk I, Trach V, Muzyka F, Serafyn Y, Prystupa E, Boretsky Y. Regeneration of Skeletal Muscle Fibers and Regulation of Myosatellitocytes Metabolism. CYTOL GENET+ 2022. [DOI: 10.3103/s0095452722030033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Pietrangelo T, Demontis R, Santangelo C, Pini N, Bonelli M, Rosato E, Roberti P, Locatelli M, Tartaglia A, Marramiero L, Verratti V, Bondi D, Fulle S, D’Aloja E, D’Ovidio C. New Perspectives for Postmortem Human Satellite Cells of Different Embryological Origin. Front Physiol 2022; 13:886149. [PMID: 35694403 PMCID: PMC9174741 DOI: 10.3389/fphys.2022.886149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/22/2022] [Indexed: 11/23/2022] Open
Abstract
Human postmortem skeletal muscles are a unique source of satellite cells for skeletal muscle regenerative studies. Presomite and somite satellite cells obtained by postmortem muscles have been established as populations of human skeletal muscle precursor cells able to proliferate and differentiate in vitro. It is extremely interesting to have access to a large amount of postmortem human skeletal muscle precursor cells, especially from craniofacial as well as limb skeletal muscles in order to evaluate their potential application not only for the fundamental understanding of muscle physiology and diseases but also for drug testing in a challenging 3D-shaping muscles like skeletal muscle microphysiological systems.
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Affiliation(s)
- Tiziana Pietrangelo
- Laboratory of Functional Evaluation and Cellular Physiology, Department Neuroscience Imaging and Clinical Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
- Interuniversity Institute of Myology (IIM), Chieti, Italy
- *Correspondence: Tiziana Pietrangelo,
| | - Roberto Demontis
- Department of Medical Sciences and Public Health, Section of Legal Medicine, University of Cagliari, Cagliari, Italy
| | - Carmen Santangelo
- Laboratory of Functional Evaluation and Cellular Physiology, Department Neuroscience Imaging and Clinical Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
- Interuniversity Institute of Myology (IIM), Chieti, Italy
| | - Niccolò Pini
- Laboratory of Functional Evaluation and Cellular Physiology, Department Neuroscience Imaging and Clinical Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Martina Bonelli
- Department of Medicine and Aging Sciences, Section of Legal Medicine, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Enrica Rosato
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Paola Roberti
- Department of Medical Sciences and Public Health, Section of Legal Medicine, University of Cagliari, Cagliari, Italy
| | - Marcello Locatelli
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Angela Tartaglia
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Lorenzo Marramiero
- Laboratory of Functional Evaluation and Cellular Physiology, Department Neuroscience Imaging and Clinical Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
- Interuniversity Institute of Myology (IIM), Chieti, Italy
| | - Vittore Verratti
- Department of Psychological, Health and Territorial Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Danilo Bondi
- Laboratory of Functional Evaluation and Cellular Physiology, Department Neuroscience Imaging and Clinical Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
- Interuniversity Institute of Myology (IIM), Chieti, Italy
| | - Stefania Fulle
- Laboratory of Functional Evaluation and Cellular Physiology, Department Neuroscience Imaging and Clinical Sciences, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
- Interuniversity Institute of Myology (IIM), Chieti, Italy
| | - Ernesto D’Aloja
- Department of Medical Sciences and Public Health, Section of Legal Medicine, University of Cagliari, Cagliari, Italy
| | - Cristian D’Ovidio
- Department of Medicine and Aging Sciences, Section of Legal Medicine, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
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14
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An Immunogenic and Slow-Growing Cryptococcal Strain Induces a Chronic Granulomatous Infection in Murine Lungs. Infect Immun 2022; 90:e0058021. [PMID: 35587201 PMCID: PMC9202370 DOI: 10.1128/iai.00580-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Many successful pathogens cause latent infections, remaining dormant within the host for years but retaining the ability to reactivate to cause symptomatic disease. The human opportunistic fungal pathogen Cryptococcus neoformans establishes latent pulmonary infections in immunocompetent individuals upon inhalation from the environment. These latent infections are frequently characterized by granulomas, or foci of chronic inflammation, that contain dormant and persistent cryptococcal cells. Immunosuppression can cause these granulomas to break down and release fungal cells that proliferate, disseminate, and eventually cause lethal cryptococcosis. This course of fungal latency and reactivation is understudied due to limited models, as chronic pulmonary granulomas do not typically form in mouse cryptococcal infections. A loss-of-function mutation in the Cryptococcus-specific MAR1 gene was previously described to alter cell surface remodeling in response to host signals. Here, we demonstrate that the mar1Δ mutant strain persists long term in a murine inhalation model of cryptococcosis, inducing a chronic pulmonary granulomatous response. We find that murine infections with the mar1Δ mutant strain are characterized by reduced fungal burden, likely due to the low growth rate of the mar1Δ mutant strain at physiological temperature, and an altered host immune response, likely due to inability of the mar1Δ mutant strain to properly employ virulence factors. We propose that this combination of features in the mar1Δ mutant strain collectively promotes the induction of a more chronic inflammatory response and enables long-term fungal persistence within these granulomatous regions.
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15
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Chen MM, Li Y, Deng SL, Zhao Y, Lian ZX, Yu K. Mitochondrial Function and Reactive Oxygen/Nitrogen Species in Skeletal Muscle. Front Cell Dev Biol 2022; 10:826981. [PMID: 35265618 PMCID: PMC8898899 DOI: 10.3389/fcell.2022.826981] [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: 12/01/2021] [Accepted: 01/26/2022] [Indexed: 12/06/2022] Open
Abstract
Skeletal muscle fibers contain a large number of mitochondria, which produce ATP through oxidative phosphorylation (OXPHOS) and provide energy for muscle contraction. In this process, mitochondria also produce several types of "reactive species" as side product, such as reactive oxygen species and reactive nitrogen species which have attracted interest. Mitochondria have been proven to have an essential role in the production of skeletal muscle reactive oxygen/nitrogen species (RONS). Traditionally, the elevation in RONS production is related to oxidative stress, leading to impaired skeletal muscle contractility and muscle atrophy. However, recent studies have shown that the optimal RONS level under the action of antioxidants is a critical physiological signal in skeletal muscle. Here, we will review the origin and physiological functions of RONS, mitochondrial structure and function, mitochondrial dynamics, and the coupling between RONS and mitochondrial oxidative stress. The crosstalk mechanism between mitochondrial function and RONS in skeletal muscle and its regulation of muscle stem cell fate and myogenesis will also be discussed. In all, this review aims to describe a comprehensive and systematic network for the interaction between skeletal muscle mitochondrial function and RONS.
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Affiliation(s)
- Ming-Ming Chen
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yan Li
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shou-Long Deng
- NHC Key Laboratory of Human Disease Comparative Medicine, Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical College, Beijing, China
| | - Yue Zhao
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zheng-Xing Lian
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Kun Yu
- College of Animal Science and Technology, China Agricultural University, Beijing, China
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16
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A Long Journey before Cycling: Regulation of Quiescence Exit in Adult Muscle Satellite Cells. Int J Mol Sci 2022; 23:ijms23031748. [PMID: 35163665 PMCID: PMC8836154 DOI: 10.3390/ijms23031748] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/28/2022] [Accepted: 01/30/2022] [Indexed: 02/04/2023] Open
Abstract
Skeletal muscle harbors a pool of stem cells called muscle satellite cells (MuSCs) that are mainly responsible for its robust regenerative capacities. Adult satellite cells are mitotically quiescent in uninjured muscles under homeostasis, but they exit quiescence upon injury to re-enter the cell cycle to proliferate. While most of the expanded satellites cells differentiate and fuse to form new myofibers, some undergo self-renewal to replenish the stem cell pool. Specifically, quiescence exit describes the initial transition of MuSCs from quiescence to the first cell cycle, which takes much longer than the time required for subsequent cell cycles and involves drastic changes in cell size, epigenetic and transcriptomic profiles, and metabolic status. It is, therefore, an essential period indispensable for the success of muscle regeneration. Diverse mechanisms exist in MuSCs to regulate quiescence exit. In this review, we summarize key events that occur during quiescence exit in MuSCs and discuss the molecular regulation of this process with an emphasis on multiple levels of intrinsic regulatory mechanisms. A comprehensive understanding of how quiescence exit is regulated will facilitate satellite cell-based muscle regenerative therapies and advance their applications in various disease and aging conditions.
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17
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Cieśla J, Tomsia M. Cadaveric Stem Cells: Their Research Potential and Limitations. Front Genet 2022; 12:798161. [PMID: 35003228 PMCID: PMC8727551 DOI: 10.3389/fgene.2021.798161] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 11/30/2021] [Indexed: 12/28/2022] Open
Abstract
In the era of growing interest in stem cells, the availability of donors for transplantation has become a problem. The isolation of embryonic and fetal cells raises ethical controversies, and the number of adult donors is deficient. Stem cells isolated from deceased donors, known as cadaveric stem cells (CaSCs), may alleviate this problem. So far, it was possible to isolate from deceased donors mesenchymal stem cells (MSCs), adipose delivered stem cells (ADSCs), neural stem cells (NSCs), retinal progenitor cells (RPCs), induced pluripotent stem cells (iPSCs), and hematopoietic stem cells (HSCs). Recent studies have shown that it is possible to collect and use CaSCs from cadavers, even these with an extended postmortem interval (PMI) provided proper storage conditions (like cadaver heparinization or liquid nitrogen storage) are maintained. The presented review summarizes the latest research on CaSCs and their current therapeutic applications. It describes the developments in thanatotranscriptome and scaffolding for cadaver cells, summarizes their potential applications in regenerative medicine, and lists their limitations, such as donor’s unknown medical condition in criminal cases, limited differentiation potential, higher risk of carcinogenesis, or changing DNA quality. Finally, the review underlines the need to develop procedures determining the safe CaSCs harvesting and use.
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Affiliation(s)
- Julia Cieśla
- School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland
| | - Marcin Tomsia
- Department of Forensic Medicine and Forensic Toxicology, Medical University of Silesia, Katowice, Poland
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18
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Iolascon G, Moretti A, Paoletta M, Liguori S, Di Munno O. Muscle Regeneration and Function in Sports: A Focus on Vitamin D. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:medicina57101015. [PMID: 34684052 PMCID: PMC8537590 DOI: 10.3390/medicina57101015] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 08/30/2021] [Accepted: 09/24/2021] [Indexed: 02/05/2023]
Abstract
Muscle is one of the main targets for the biological effects of vitamin D. This hormone modulates several functions of skeletal muscles, from development to tissue repair after injury, through genomic and non-genomic mechanisms. Vitamin D deficiency and supplementation seem to significantly affect muscle strength in different populations, including athletes, although optimal serum 25(OH)D3 level for sport performance has not been defined so far. Additionally, vitamin D deficiency results in myopathy characterized by fast-twitch fiber atrophy, fatty infiltration, and fibrosis. However, less is known about regenerative effects of vitamin D supplementation after sport-related muscle injuries. Vitamin D receptor (VDR) is particularly expressed in the embryonic mesoderm during intrauterine life and in satellite cells at all stages of life for recovery of the skeletal muscle after injury. Vitamin D supplementation enhances muscle differentiation, growth, and regeneration by increasing the expression of myogenic factors in satellite cells. The objective of this narrative review is to describe the role of vitamin D in sport-related muscle injury and tissue regeneration.
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Affiliation(s)
- Giovanni Iolascon
- Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, Via de Crecchio, 6, 80138 Naples, Italy; (G.I.); (M.P.); (S.L.)
| | - Antimo Moretti
- Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, Via de Crecchio, 6, 80138 Naples, Italy; (G.I.); (M.P.); (S.L.)
- Correspondence: ; Tel.: +39-0815665537
| | - Marco Paoletta
- Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, Via de Crecchio, 6, 80138 Naples, Italy; (G.I.); (M.P.); (S.L.)
| | - Sara Liguori
- Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, Via de Crecchio, 6, 80138 Naples, Italy; (G.I.); (M.P.); (S.L.)
| | - Ombretta Di Munno
- Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56122 Pisa, Italy;
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19
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Bovine Satellite Cells Isolated after 2 and 5 Days of Tissue Storage Maintain the Proliferative and Myogenic Capacity Needed for Cultured Meat Production. Int J Mol Sci 2021; 22:ijms22168376. [PMID: 34445082 PMCID: PMC8395070 DOI: 10.3390/ijms22168376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 01/03/2023] Open
Abstract
Cultured meat is an emerging alternative food technology which aims to deliver a more ethical, sustainable, and healthy muscle-tissue-derived food item compared to conventional meat. As start-up companies are rapidly forming and accelerating this technology, many aspects of this multi-faceted science have still not been investigated in academia. In this study, we investigated if bovine satellite cells with the ability to proliferate and undergo myogenic differentiation could be isolated after extended tissue storage, for the purpose of increasing the practicality for cultured meat production. Proliferation of bovine satellite cells isolated on the day of arrival or after 2 and 5 days of tissue storage were analyzed by metabolic and DNA-based assays, while their myogenic characteristics were investigated using RT-qPCR and immunofluorescence. Extended tissue storage up to 5 days did not negatively affect proliferation nor the ability to undergo fusion and create myosin heavy chain-positive myotubes. The expression patterns of myogenic and muscle-specific genes were also not affected after tissue storage. In fact, the data indicated a positive trend in terms of myogenic potential after tissue storage, although it was non-significant. These results suggest that the timeframe of which viable myogenic satellite cells can be isolated and used for cultured meat production can be greatly extended by proper tissue storage.
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20
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Novak JS, Mázala DAG, Nearing M, Hindupur R, Uapinyoying P, Habib NF, Dickson T, Ioffe OB, Harris BT, Fidelia‐Lambert MN, Rossi CT, Hill DA, Wagner KR, Hoffman EP, Partridge TA. Human muscle stem cells are refractory to aging. Aging Cell 2021; 20:e13411. [PMID: 34089289 PMCID: PMC8282247 DOI: 10.1111/acel.13411] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 04/05/2021] [Accepted: 05/08/2021] [Indexed: 12/28/2022] Open
Abstract
Age-related loss of muscle mass and strength is widely attributed to limitation in the capacity of muscle resident satellite cells to perform their myogenic function. This idea contains two notions that have not been comprehensively evaluated by experiment. First, it entails the idea that we damage and lose substantial amounts of muscle in the course of our normal daily activities. Second, it suggests that mechanisms of muscle repair are in some way exhausted, thus limiting muscle regeneration. A third potential option is that the aged environment becomes inimical to the conduct of muscle regeneration. In the present study, we used our established model of human muscle xenografting to test whether muscle samples taken from cadavers, of a range of ages, maintained their myogenic potential after being transplanted into immunodeficient mice. We find no measurable difference in regeneration across the range of ages investigated up to 78 years of age. Moreover, we report that satellite cells maintained their myogenic capacity even when muscles were grafted 11 days postmortem in our model. We conclude that the loss of muscle mass with increasing age is not attributable to any intrinsic loss of myogenicity and is most likely a reflection of progressive and detrimental changes in the muscle microenvironment such as to disfavor the myogenic function of these cells.
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Affiliation(s)
- James S. Novak
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
- Department of Genomics and Precision MedicineThe George Washington University School of Medicine and Health SciencesWashingtonDCUSA
- Department of PediatricsThe George Washington University School of Medicine and Health SciencesWashingtonDCUSA
| | - Davi A. G. Mázala
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
- Department of Kinesiology, College of Health ProfessionsTowson UniversityTowsonMDUSA
| | - Marie Nearing
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
- Department of MedicineUniversity of Alabama at BirminghamBirminghamALUSA
| | - Ravi Hindupur
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
| | - Prech Uapinyoying
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and StrokeNational Institutes of HealthBethesdaMDUSA
| | - Nayab F. Habib
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
| | - Tessa Dickson
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
| | - Olga B. Ioffe
- Department of PathologyUniversity of Maryland School of MedicineBaltimoreMDUSA
| | - Brent T. Harris
- Department of Neurology and PathologyGeorgetown University Medical CenterWashingtonDCUSA
| | | | - Christopher T. Rossi
- Department of Pathology and Laboratory MedicineChildren's National HospitalWashingtonDCUSA
| | - D. Ashely Hill
- Department of Pathology and Laboratory MedicineChildren's National HospitalWashingtonDCUSA
| | - Kathryn R. Wagner
- The Hugo W. Moser Research InstituteKennedy Krieger InstituteBaltimoreMDUSA
- Departments of Neurology and NeuroscienceJohns Hopkins University School of MedicineBaltimoreMDUSA
| | - Eric P. Hoffman
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical SciencesBinghamton UniversityBinghamtonNYUSA
| | - Terence A. Partridge
- Center for Genetic Medicine Research, Children's Research InstituteChildren's National HospitalWashingtonDCUSA
- Department of Genomics and Precision MedicineThe George Washington University School of Medicine and Health SciencesWashingtonDCUSA
- Department of PediatricsThe George Washington University School of Medicine and Health SciencesWashingtonDCUSA
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21
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Isesele PO, Mazurak VC. Regulation of Skeletal Muscle Satellite Cell Differentiation by Omega-3 Polyunsaturated Fatty Acids: A Critical Review. Front Physiol 2021; 12:682091. [PMID: 34149458 PMCID: PMC8209368 DOI: 10.3389/fphys.2021.682091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 04/30/2021] [Indexed: 12/17/2022] Open
Abstract
Skeletal muscle is composed of multinuclear cells called myofibres, which are formed by the fusion of myoblasts during development. The size of the muscle fiber and mass of skeletal muscle are altered in response to several pathological and physiological conditions. Skeletal muscle regeneration is primarily mediated by muscle stem cells called satellite cells (SCs). In response to injury, these SCs replenish myogenic progenitor cells to form new myofibers to repair damaged muscle. During myogenesis, activated SCs proliferate and differentiate to myoblast and then fuse with one another to form muscle fibers. A reduced number of SCs and an inability to undergo myogenesis may contribute to skeletal muscle disorders such as atrophy, cachexia, and sarcopenia. Myogenic regulatory factors (MRF) are transcription factors that regulate myogenesis and determines whether SCs will be in the quiescent, activated, committed, or differentiated state. Mitochondria oxidative phosphorylation and oxidative stress play a role in the determination of the fate of SCs. The potential activation and function of SCs are also affected by inflammation during skeletal muscle regeneration. Omega-3 polyunsaturated fatty acids (PUFAs) show promise to reduce inflammation, maintain muscle mass during aging, and increase the functional capacity of the muscle. The aim of this critical review is to highlight the role of omega-3 PUFAs on the myogenic differentiation of SCs and pathways affected during the differentiation process, including mitochondrial function and inflammation from the current body of literature.
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Affiliation(s)
- Peter O Isesele
- Division of Human Nutrition, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB, Canada
| | - Vera C Mazurak
- Division of Human Nutrition, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB, Canada
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22
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Latham CM, Brightwell CR, Keeble AR, Munson BD, Thomas NT, Zagzoog AM, Fry CS, Fry JL. Vitamin D Promotes Skeletal Muscle Regeneration and Mitochondrial Health. Front Physiol 2021; 12:660498. [PMID: 33935807 PMCID: PMC8079814 DOI: 10.3389/fphys.2021.660498] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/17/2021] [Indexed: 12/13/2022] Open
Abstract
Vitamin D is an essential nutrient for the maintenance of skeletal muscle and bone health. The vitamin D receptor (VDR) is present in muscle, as is CYP27B1, the enzyme that hydroxylates 25(OH)D to its active form, 1,25(OH)D. Furthermore, mounting evidence suggests that vitamin D may play an important role during muscle damage and regeneration. Muscle damage is characterized by compromised muscle fiber architecture, disruption of contractile protein integrity, and mitochondrial dysfunction. Muscle regeneration is a complex process that involves restoration of mitochondrial function and activation of satellite cells (SC), the resident skeletal muscle stem cells. VDR expression is strongly upregulated following injury, particularly in central nuclei and SCs in animal models of muscle injury. Mechanistic studies provide some insight into the possible role of vitamin D activity in injured muscle. In vitro and in vivo rodent studies show that vitamin D mitigates reactive oxygen species (ROS) production, augments antioxidant capacity, and prevents oxidative stress, a common antagonist in muscle damage. Additionally, VDR knockdown results in decreased mitochondrial oxidative capacity and ATP production, suggesting that vitamin D is crucial for mitochondrial oxidative phosphorylation capacity; an important driver of muscle regeneration. Vitamin D regulation of mitochondrial health may also have implications for SC activity and self-renewal capacity, which could further affect muscle regeneration. However, the optimal timing, form and dose of vitamin D, as well as the mechanism by which vitamin D contributes to maintenance and restoration of muscle strength following injury, have not been determined. More research is needed to determine mechanistic action of 1,25(OH)D on mitochondria and SCs, as well as how this action manifests following muscle injury in vivo. Moreover, standardization in vitamin D sufficiency cut-points, time-course study of the efficacy of vitamin D administration, and comparison of multiple analogs of vitamin D are necessary to elucidate the potential of vitamin D as a significant contributor to muscle regeneration following injury. Here we will review the contribution of vitamin D to skeletal muscle regeneration following injury.
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Affiliation(s)
- Christine M Latham
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States
| | - Camille R Brightwell
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States
| | - Alexander R Keeble
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States
| | - Brooke D Munson
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States
| | - Nicholas T Thomas
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States
| | - Alyaa M Zagzoog
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States
| | - Christopher S Fry
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States.,Center for Muscle Biology, College of Health Sciences, University of Kentucky, Lexington, KY, United States
| | - Jean L Fry
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, KY, United States.,Center for Muscle Biology, College of Health Sciences, University of Kentucky, Lexington, KY, United States
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23
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Emami NK, Cauble RN, Dhamad AE, Greene ES, Coy CS, Velleman SG, Orlowski S, Anthony N, Bedford M, Dridi S. Hypoxia further exacerbates woody breast myopathy in broilers via alteration of satellite cell fate. Poult Sci 2021; 100:101167. [PMID: 34091348 PMCID: PMC8182261 DOI: 10.1016/j.psj.2021.101167] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/09/2021] [Accepted: 03/19/2021] [Indexed: 11/30/2022] Open
Abstract
Woody breast (WB) condition has created a variety of challenges for the global poultry industry. To date, there are no effective treatments or preventative measures due to its unknown (undefined) etiology. Several potential mechanisms including oxidative stress, fiber-type switching, cellular damage, and altered intracellular calcium levels have been proposed to play a key role in the progression of the WB myopathy. In a previous study, we have shown that WB is associated with hypoxia-like status and dysregulated oxygen homeostasis. As satellite cells (SC) play a pivotal role in muscle fiber repair and remodeling under stress conditions, we undertook the present study to determine satellite cell fate in WB-affected birds when reared in either normoxic or hypoxic conditions. Modern random bred broilers from 2015 (n = 200) were wing banded and reared under standard brooding practices for the first 2 wk post-hatch. At 15 d, chicks were divided in 2 body weight-matched groups and reared to 6 wk in either control local altitude or hypobaric chambers with simulated altitude of 6,000 ft. Birds were provided ad libitum access to water and feed, according to the Cobb recommendations. At 6 wk of age, birds were processed and scored for WB, and breast samples were collected from WB-affected and unaffected birds for molecular analyses (n = 10/group). SCs were isolated from normal breast muscle, cultured in vitro, and exposed to normoxia or hypoxia for 2 h. The expression of target genes was determined by qPCR using 2−∆∆Ct method. Protein distribution and expression were determined by immunofluorescence staining and immunoblot, respectively. Data were analyzed by the Student's t test with significance set at P < 0.05. Multiple satellite cell markers, myogenic factor (Myf)-5 and paired box (PAX)-7 were significantly decreased at the mRNA and protein levels in the breast muscle from WB-affected birds compared to their unaffected counterparts. Lipogenic-and adipogenic-associated factors (acetyl-CoA carboxylase, ACCα; fatty acid synthase, FASN, malic enzyme, ME; and ATP citrate lyase, ACLY) were activated in WB-affected birds. These data were supported by an in vitro study where hypoxia decreased the expression of Myf5 and Pax7, and increased that of ACCα, FASN, ME, and ACLY. Together, these data indicate that under hypoxic condition, SC change fate by switching from a myogenic to an adipogenic program, which explains at least partly, the etiology of the WB myopathy.
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Affiliation(s)
- Nima K Emami
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, 1260 W. Maple Street, Fayetteville 72701, USA
| | - Reagan N Cauble
- Department of Animal Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - Ahmed E Dhamad
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA
| | - Elizabeth S Greene
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, 1260 W. Maple Street, Fayetteville 72701, USA
| | - Cynthia S Coy
- Department of Animal Sciences, The Ohio State University, Wooster, OH 44691, USA
| | - Sandra G Velleman
- Department of Animal Sciences, The Ohio State University, Wooster, OH 44691, USA
| | - Sara Orlowski
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, 1260 W. Maple Street, Fayetteville 72701, USA
| | - Nicholas Anthony
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, 1260 W. Maple Street, Fayetteville 72701, USA
| | | | - Sami Dridi
- Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas, 1260 W. Maple Street, Fayetteville 72701, USA.
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24
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Rieger M, Duran P, Cook M, Schenk S, Shah M, Jacobs M, Christman K, Kado DM, Alperin M. Quantifying the Effects of Aging on Morphological and Cellular Properties of Human Female Pelvic Floor Muscles. Ann Biomed Eng 2021; 49:1836-1847. [PMID: 33683527 DOI: 10.1007/s10439-021-02748-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/04/2021] [Indexed: 12/11/2022]
Abstract
Age-related pelvic floor muscle (PFM) dysfunction is a critical defect in the progression to pelvic floor disorders (PFDs). Despite dramatic prevalence of PFDs in older women, the underlying pathophysiology of age-related PFM dysfunction remains poorly understood. Using cadaveric specimens, we quantified aging effects on functionally relevant PFM properties and compared PFMs with the appendicular muscles from the same donors. PFMs, obturator internus, and vastus lateralis were procured from younger (N = 4) and older (N = 11) donors with known obstetrical and medical history. Our findings demonstrate that PFMs undergo degenerative, rather than atrophic, alterations. Importantly, age-related fibrotic degeneration disproportionally impacts PFMs compared to the appendicular muscles. We identified intramuscular lipid accumulation as another contributing factor to the pathological alterations of PFMs with aging. We observed a fourfold decrease in muscle stem cell (MuSC) pool of aged relative to younger PFMs, but the MuSC pool of appendicular muscles from the same older donors was only twofold lower than in younger group, although these differences were not statistically significant. Age-related degeneration appears to disproportionally impact PFMs relative to the appendicular muscles from the same donors. Knowledge of tissue- and cell-level changes in aged PFMs is essential to promote our understanding of the mechanisms governing PFM dysfunction in older women.
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Affiliation(s)
- Mary Rieger
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0863, USA
| | - Pamela Duran
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, USA
| | - Mark Cook
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, USA
| | - Simon Schenk
- Department of Orthopedic Surgery, University of California San Diego, La Jolla, USA
| | - Manali Shah
- Department of Bioengineering, University of California San Diego, La Jolla, USA
| | - Marni Jacobs
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Diego, La Jolla, USA
| | - Karen Christman
- Department of Bioengineering and Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, USA
| | - Deborah M Kado
- Herbert Wertheim School of Public Health and Human Longevity Science, University of California San Diego, La Jolla, USA.,Department of Medicine, University of California San Diego, La Jolla, USA
| | - Marianna Alperin
- Division of Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0863, USA.
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25
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Ancel S, Stuelsatz P, Feige JN. Muscle Stem Cell Quiescence: Controlling Stemness by Staying Asleep. Trends Cell Biol 2021; 31:556-568. [PMID: 33674167 DOI: 10.1016/j.tcb.2021.02.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/03/2021] [Accepted: 02/08/2021] [Indexed: 12/22/2022]
Abstract
Muscle stem cells (MuSCs) are tissue-resident stem cells required for growth and repair of skeletal muscle, that are otherwise maintained in a cell-cycle-arrested state called quiescence. While quiescence was originally believed to be a state of cellular inactivity, increasing evidence suggests that quiescence is dynamically regulated and contributes to stemness, the long-term capacity to maintain regenerative functions. Here, we review the current understanding of MuSC quiescence and highlight recently discovered molecular markers, which differentiate depth of quiescence and influence self-renewal capacity. We also discuss how quiescent MuSCs integrate paracrine factors from their niche and dynamically regulate cell signaling, metabolism and proteostasis as they anticipate physiological needs, and how perturbing these cues during aging impairs muscle regeneration.
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Affiliation(s)
- Sara Ancel
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Pascal Stuelsatz
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Jerome N Feige
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
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26
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Relaix F, Bencze M, Borok MJ, Der Vartanian A, Gattazzo F, Mademtzoglou D, Perez-Diaz S, Prola A, Reyes-Fernandez PC, Rotini A, Taglietti. Perspectives on skeletal muscle stem cells. Nat Commun 2021; 12:692. [PMID: 33514709 PMCID: PMC7846784 DOI: 10.1038/s41467-020-20760-6] [Citation(s) in RCA: 142] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 12/17/2020] [Indexed: 01/30/2023] Open
Abstract
Skeletal muscle has remarkable regeneration capabilities, mainly due to its resident muscle stem cells (MuSCs). In this review, we introduce recently developed technologies and the mechanistic insights they provide to the understanding of MuSC biology, including the re-definition of quiescence and Galert states. Additionally, we present recent studies that link MuSC function with cellular heterogeneity, highlighting the complex regulation of self-renewal in regeneration, muscle disorders and aging. Finally, we discuss MuSC metabolism and its role, as well as the multifaceted regulation of MuSCs by their niche. The presented conceptual advances in the MuSC field impact on our general understanding of stem cells and their therapeutic use in regenerative medicine.
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Affiliation(s)
- F. Relaix
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France ,EnvA, IMRB, 94700 Maisons-Alfort, France ,grid.462410.50000 0004 0386 3258EFS, IMRB, 94010 Creteil, France ,grid.50550.350000 0001 2175 4109AP-HP, Hopital Mondor, Service d’histologie, 94010 Creteil, France
| | - M. Bencze
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - M. J. Borok
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - A. Der Vartanian
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - F. Gattazzo
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France ,grid.462410.50000 0004 0386 3258EFS, IMRB, 94010 Creteil, France
| | - D. Mademtzoglou
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - S. Perez-Diaz
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - A. Prola
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France ,EnvA, IMRB, 94700 Maisons-Alfort, France
| | - P. C. Reyes-Fernandez
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - A. Rotini
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
| | - Taglietti
- grid.462410.50000 0004 0386 3258Univ Paris Est Creteil, INSERM, IMRB, 94010 Creteil, France
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27
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Feige P, Tsai EC, Rudnicki MA. Analysis of human satellite cell dynamics on cultured adult skeletal muscle myofibers. Skelet Muscle 2021; 11:1. [PMID: 33397479 PMCID: PMC7780694 DOI: 10.1186/s13395-020-00256-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 12/06/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Maintaining stem cells in physiologically relevant states is necessary to understand cell and context-specific signalling paradigms and to understand complex interfaces between cells in situ. Understanding human stem cell function is largely based on tissue biopsies, cell culture, and transplantation into model organisms. METHODS Here, we describe a method to isolate post-mortem intact human muscle myofibers and culture muscle stem cells within the niche microenvironment to assay cellular dynamics, stem cell identity, stem cell hierarchy, and differentiation potential. RESULTS We show human myofiber culture maintains complex cell-cell contacts and extracellular niche composition during culture. Human satellite cells can be cultured at least 8 days, which represents a timepoint of activation, differentiation, and de novo human myofiber formation. We demonstrate that adult human muscle stem cells undergo apicobasal and planar cell divisions and express polarized dystrophin and EGFR. Furthermore, we validate that stimulation of the EGFR pathway stimulates the generation of myogenic progenitors and myogenic differentiation. CONCLUSIONS This method provides proof of principle evidence for the use of human muscle to evaluate satellite cell dynamics and has applications in pre-clinical evaluation of therapeutics targeting muscle repair.
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Affiliation(s)
- Peter Feige
- Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON, K1H 8L6, Canada
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
- Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Eve C Tsai
- Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON, K1H 8L6, Canada
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
- Department of Surgery, Division of Neurosurgery, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
- Ottawa Hospital Research Institute, Neuroscience Program, Ottawa, ON, Canada
| | - Michael A Rudnicki
- Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON, K1H 8L6, Canada.
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.
- Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.
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28
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Ceausu Z, Socea B, Dimitriu MCT, Predescu D, Constantin VD, Bacalbaşa N, Cîrstoveanu C, Costache M, Ceausu M. Dormant cardiac stem cells: A promising tool in cardiac regeneration. Exp Ther Med 2020; 20:3452-3457. [PMID: 32905130 PMCID: PMC7465489 DOI: 10.3892/etm.2020.9015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 06/23/2020] [Indexed: 12/12/2022] Open
Abstract
Stem cells represent an old niche with various new potential therapeutics. Besides drug treatment, reperfusion procedures and surgical revascularization, stem cell therapy could be a good option in ischemic cardiac diseases. A study was performed on a small group of cases who died of cardiac arrhythmia secondary to scarring myocardial infarctions. Tissue cardiac samples were taken from these cases (from the anterior and lateral wall of the left ventricle), for microscopy examination, in order to investigate the presence of cardiac stem cells (CSC). Multiple series of histological sections were also performed and examined, along with immunohistochemical analysis (IHC). The cells were identified in close contact with the residual ischemic cardiomyocytes, in the proximity of the myocardial collagenous scar, in old myocardial infarctions. They were activated by hypoxic ischemia and were influenced by the capillary microvascular density and the interstitial micro-environment conditions. In chronic intermittent ischemia they seem to turn themselves from dormant quiescent cells into activated progenitor committed cells.
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Affiliation(s)
- Zenaida Ceausu
- Pathology Department, 'Sf. Pantelimon' Emergency Clinical Hospital, 021659 Bucharest, Romania
| | - Bogdan Socea
- Department of Surgery, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Department of Surgery, 'Sf. Pantelimon' Emergency Clinical Hospital, 021659 Bucharest, Romania
| | - Mihai C T Dimitriu
- Department of Obstetrics and Gynecology, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Department of Obstetrics and Gynecology, 'Sf. Pantelimon' Emergency Clinical Hospital, 021659 Bucharest, Romania
| | - Dragoş Predescu
- Department of Surgery, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Department of Surgery, 'Sf. Maria' Hospital, 011172 Bucharest, Romania
| | - Vlad D Constantin
- Department of Surgery, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Department of Surgery, 'Sf. Pantelimon' Emergency Clinical Hospital, 021659 Bucharest, Romania
| | - Nicolae Bacalbaşa
- Department of Obstetrics and Gynecology, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Department of Obstetrics and Gynecology, 'Dr. I. Cantacuzino' Clinical Hospital, 020475 Bucharest, Romania
| | - Cătălin Cîrstoveanu
- Pediatrics Department, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Pediatrics Department, 'Maria Sklodowska Curie' Emergency Clinical Hospital for Children, 050831 Bucharest, Romania
| | - Mariana Costache
- Pathology Department, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Pathology Department, University Emergency Hospital, 050098 Bucharest, Romania
| | - Mihai Ceausu
- Pathology Department, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania.,Department of Pathology, 'Mina Minovici' National Institute of Legal Medicine, 042122 Bucharest, Romania
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29
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Bhattacharya D, Scimè A. Mitochondrial Function in Muscle Stem Cell Fates. Front Cell Dev Biol 2020; 8:480. [PMID: 32612995 PMCID: PMC7308489 DOI: 10.3389/fcell.2020.00480] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/22/2020] [Indexed: 01/25/2023] Open
Abstract
Mitochondria are crucial organelles that control cellular metabolism through an integrated mechanism of energy generation via oxidative phosphorylation. Apart from this canonical role, it is also integral for ROS production, fatty acid metabolism and epigenetic remodeling. Recently, a role for the mitochondria in effecting stem cell fate decisions has gained considerable interest. This is important for skeletal muscle, which exhibits a remarkable property for regeneration following injury, owing to satellite cells (SCs), the adult myogenic stem cells. Mitochondrial function is associated with maintaining and dictating SC fates, linked to metabolic programming during quiescence, activation, self-renewal, proliferation and differentiation. Notably, mitochondrial adaptation might take place to alter SC fates and function in the presence of different environmental cues. This review dissects the contribution of mitochondria to SC operational outcomes, focusing on how their content, function, dynamics and adaptability work to influence SC fate decisions.
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Affiliation(s)
- Debasmita Bhattacharya
- Molecular, Cellular and Integrative Physiology, Faculty of Health, York University, Toronto, ON, Canada
| | - Anthony Scimè
- Molecular, Cellular and Integrative Physiology, Faculty of Health, York University, Toronto, ON, Canada
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30
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Tissues from Post-Mortem Donors as Alternative Sources of Stem Cells for Regenerative Medicine. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1288:33-46. [PMID: 32036570 DOI: 10.1007/5584_2020_492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Stem cells provide for all of the tissues in our body during embryogenesis. In adult organisms, they can be found as rare populations of tissue-specific stem cells in quiescent states, although they can still regenerate damaged tissues. Astonishingly, these cells are retained in tissues even post-mortem. There have been several reports that have provided evidence that cells with stem-like capabilities can be isolated, expanded, and differentiated in vitro from various tissues several hours, or even several days, post-mortem. Moreover, some post-mortem-tissue-derived stem cells can successfully engraft and regenerate injured host tissues. Here, we review in-vitro and in-vivo studies that provide evidence of isolation and characterization of stem cells from different tissues post-mortem, with a focus on the musculoskeletal and neural systems. Finally, we discuss their potential for use in regenerative medicine, and what needs to be done in further research toward their better exploitation.
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31
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Saito T, Sato T, Suzuki K. Isolation and culture of human adipose-derived mesenchymal stromal/stem cells harvested from postmortem adipose tissues. J Forensic Leg Med 2020; 69:101875. [DOI: 10.1016/j.jflm.2019.101875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 11/25/2022]
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32
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Purohit G, Dhawan J. Adult Muscle Stem Cells: Exploring the Links Between Systemic and Cellular Metabolism. Front Cell Dev Biol 2019; 7:312. [PMID: 31921837 PMCID: PMC6915107 DOI: 10.3389/fcell.2019.00312] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 11/15/2019] [Indexed: 12/13/2022] Open
Abstract
Emerging evidence suggests that metabolites are important regulators of skeletal muscle stem cell (MuSC) function and fate. While highly proliferative in early life, MuSCs reside in adult skeletal muscle tissue in a quiescent and metabolically depressed state, but are critical for the homeostatic maintenance and regenerative response of the tissue to damage. It is well established that metabolic activity in MuSC changes with their functional activation, but the spatiotemporal links between physiological metabolism and stem cell metabolism require explicit delineation. The quiescent MuSC is defined by a specific metabolic state, which is controlled by intrinsic and extrinsic factors during physiological and pathological tissue dynamics. However, the extent of tissue and organismal level changes driven by alteration in metabolic state of quiescent MuSC is currently not well defined. In addition to their role as biosynthetic precursors and signaling molecules, metabolites are key regulators of epigenetic mechanisms. Emerging evidence points to metabolic control of epigenetic mechanisms in MuSC and their impact on muscle regenerative capacity. In this review, we explore the links between cell-intrinsic, tissue level, and systemic metabolic state in the context of MuSC metabolic state, quiescence, and tissue homeostasis to highlight unanswered questions.
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Affiliation(s)
- Gunjan Purohit
- Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Jyotsna Dhawan
- Centre for Cellular and Molecular Biology, Hyderabad, India
- Institute for Stem Cell Science and Regenerative Medicine, Bengaluru, India
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33
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A Three-Dimensional Culture Model of Reversibly Quiescent Myogenic Cells. Stem Cells Int 2019; 2019:7548160. [PMID: 31827532 PMCID: PMC6885280 DOI: 10.1155/2019/7548160] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/24/2019] [Accepted: 10/03/2019] [Indexed: 12/13/2022] Open
Abstract
Satellite cells (SC) are the stem cells of skeletal muscles. They are quiescent in adult animals but resume proliferation to allow muscle hypertrophy or regeneration after injury. The mechanisms balancing quiescence, self-renewal, and differentiation of SC are difficult to analyze in vivo owing to their complexity and in vitro because the staminal character of SC is lost when they are removed from the niche and is not adequately reproduced in the culture models currently available. To overcome these difficulties, we set up a culture model of the myogenic C2C12 cell line in suspension. When C2C12 cells are cultured in suspension, they enter a state of quiescence and form three-dimensional aggregates (myospheres) that produce the extracellular matrix and express markers of quiescent SC. In the initial phase of culture, a portion of the cells fuses in syncytia and abandons the myospheres. The remaining cells are mononucleated and quiescent but resume proliferation and differentiation when plated in a monolayer. The notch pathway controls the quiescent state of the cells as shown by the fact that its inhibition leads to the resumption of differentiation. Within this context, notch3 appears to play a central role in the activity of this pathway since the expression of notch1 declines soon after aggregation. In summary, the culture model of C2C12 in suspension may be used to study the cellular interactions of muscle stem cells and the pathways controlling SC quiescence entrance and maintenance.
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34
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Hommel B, Sturny-Leclère A, Volant S, Veluppillai N, Duchateau M, Yu CH, Hourdel V, Varet H, Matondo M, Perfect JR, Casadevall A, Dromer F, Alanio A. Cryptococcus neoformans resists to drastic conditions by switching to viable but non-culturable cell phenotype. PLoS Pathog 2019; 15:e1007945. [PMID: 31356623 PMCID: PMC6687208 DOI: 10.1371/journal.ppat.1007945] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 08/08/2019] [Accepted: 06/27/2019] [Indexed: 01/22/2023] Open
Abstract
Metabolically quiescent pathogens can persist in a viable non-replicating state for months or even years. For certain infectious diseases, such as tuberculosis, cryptococcosis, histoplasmosis, latent infection is a corollary of this dormant state, which has the risk for reactivation and clinical disease. During murine cryptococcosis and macrophage uptake, stress and host immunity induce Cryptococcus neoformans heterogeneity with the generation of a sub-population of yeasts that manifests a phenotype compatible with dormancy (low stress response, latency of growth). In this subpopulation, mitochondrial transcriptional activity is regulated and this phenotype has been considered as a hallmark of quiescence in stem cells. Based on these findings, we worked to reproduce this phenotype in vitro and then standardize the experimental conditions to consistently generate this dormancy in C. neoformans. We found that incubation of stationary phase yeasts (STAT) in nutriment limited conditions and hypoxia for 8 days (8D-HYPOx) was able to produced cells that mimic the phenotype obtained in vivo. In these conditions, mortality and/or apoptosis occurred in less than 5% of the yeasts compared to 30-40% of apoptotic or dead yeasts upon incubation in normoxia (8D-NORMOx). Yeasts in 8D-HYPOx harbored a lower stress response, delayed growth and less that 1% of culturability on agar plates, suggesting that these yeasts are viable but non culturable cells (VBNC). These VBNC were able to reactivate in the presence of pantothenic acid, a vitamin that is known to be involved in quorum sensing and a precursor of acetyl-CoA. Global metabolism of 8D-HYPOx cells showed some specific requirements and was globally shut down compared to 8D-NORMOx and STAT conditions. Mitochondrial analyses showed that the mitochondrial mass increased with mitochondria mostly depolarized in 8D-HYPOx compared to 8D-NORMox, with increased expression of mitochondrial genes. Proteomic and transcriptomic analyses of 8D-HYPOx revealed that the number of secreted proteins and transcripts detected also decreased compared to 8D-NORMOx and STAT, and the proteome, secretome and transcriptome harbored specific profiles that are engaged as soon as four days of incubation. Importantly, acetyl-CoA and the fatty acid pathway involving mitochondria are required for the generation and viability maintenance of VBNC. Altogether, these data show that we were able to generate for the first time VBNC phenotype in C. neoformans. This VBNC state is associated with a specific metabolism that should be further studied to understand dormancy/quiescence in this yeast.
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Affiliation(s)
- Benjamin Hommel
- Institut Pasteur, CNRS, Molecular Mycology Unit, UMR2000, Paris, France
- Laboratoire de Parasitologie-Mycologie, Hôpital Saint-Louis, Groupe Hospitalier Lariboisière, Saint-Louis, Fernand Widal, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | | | - Stevenn Volant
- Institut Pasteur - Bioinformatics and Biostatistics Hub - C3BI, USR 3756 IP CNRS, Paris, France
| | | | - Magalie Duchateau
- Institut Pasteur, Unité de spectrométrie de masse et Protéomique, Paris, France
| | - Chen-Hsin Yu
- Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Véronique Hourdel
- Institut Pasteur, Unité de spectrométrie de masse et Protéomique, Paris, France
| | - Hugo Varet
- Institut Pasteur - Bioinformatics and Biostatistics Hub - C3BI, USR 3756 IP CNRS, Paris, France
- Institut Pasteur - Transcriptome and Epigenome Platform - Biomics Pole - C2RT, Paris, France
| | - Mariette Matondo
- Institut Pasteur, Unité de spectrométrie de masse et Protéomique, Paris, France
| | - John R. Perfect
- Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - Françoise Dromer
- Institut Pasteur, CNRS, Molecular Mycology Unit, UMR2000, Paris, France
| | - Alexandre Alanio
- Institut Pasteur, CNRS, Molecular Mycology Unit, UMR2000, Paris, France
- Laboratoire de Parasitologie-Mycologie, Hôpital Saint-Louis, Groupe Hospitalier Lariboisière, Saint-Louis, Fernand Widal, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Paris, France
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
- * E-mail:
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35
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Cho IJ, Lui PP, Obajdin J, Riccio F, Stroukov W, Willis TL, Spagnoli F, Watt FM. Mechanisms, Hallmarks, and Implications of Stem Cell Quiescence. Stem Cell Reports 2019; 12:1190-1200. [PMID: 31189093 PMCID: PMC6565921 DOI: 10.1016/j.stemcr.2019.05.012] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/14/2019] [Accepted: 05/14/2019] [Indexed: 02/08/2023] Open
Abstract
Cellular quiescence is a dormant but reversible cellular state in which cell-cycle entry and proliferation are prevented. Recent studies both in vivo and in vitro demonstrate that quiescence is actively maintained through synergistic interactions between intrinsic and extrinsic signals. Subtypes of adult mammalian stem cells can be maintained in this poised, quiescent state, and subsequently reactivated upon tissue injury to restore homeostasis. However, quiescence can become deregulated in pathological settings. In this review, we discuss the recent advances uncovering intracellular signaling pathways, transcriptional changes, and extracellular cues within the stem cell niche that control induction and exit from quiescence in tissue stem cells. We discuss the implications of quiescence as well as the pharmacological and genetic approaches that are being explored to either induce or prevent quiescence as a therapeutic strategy.
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Affiliation(s)
- Inchul J Cho
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Prudence PokWai Lui
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Jana Obajdin
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Federica Riccio
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Wladislaw Stroukov
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Thea Louise Willis
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Francesca Spagnoli
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, Guy's Hospital, Floor 28, Tower Wing, Great Maze Pond, London SE1 9RT, UK.
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36
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Currie SE, Mène-Saffrané L, Fasel NJ. Valuable carcasses: postmortem preservation of fatty acid composition in heart tissue. CONSERVATION PHYSIOLOGY 2019; 7:coz005. [PMID: 30805190 PMCID: PMC6382032 DOI: 10.1093/conphys/coz005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 12/04/2018] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
In order to effectively conserve species, we must understand the structure and function of integral mechanisms at all levels of organismal organisation, from intracellular biochemistry to whole animal ecophysiology. The accuracy of biochemical analyses depend on the quality and integrity of the samples analysed. It is believed that tissue samples collected immediately postmortem provide the most reliable depiction of the living animal. Yet, euthanasia of threatened or protected species for the collection of tissue presents a number of ethical complications. Polyunsaturated fatty acids (PUFA) are essential to the cardiovascular system of all animals and the structure of PUFA can be degraded by peroxidation, potentially modifying the fatty acid composition of the tissue over postmortem time. Here, we assessed the composition of PUFA in cardiac tissue of bats (Carollia perspicillata) over the course of 12-h postmortem. We show that PUFA are resistant to naturally occurring postmortem degradation in heart tissue, with no difference in the overall composition of fatty acids across all time classes (0, 3, 6 or 12-h postmortem). Our results suggest that carcasses that would otherwise be discarded may actually be viable for the assessment of fatty acid composition in a number of tissues. We hope to spur further investigations into the viability of carcasses for other biochemical analyses as they may be an untapped resource available to biologists.
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Affiliation(s)
- Shannon E Currie
- Department of Evolutionary Ecology, Leibniz Institute for Zoo and Wildlife Research, Alfred Kowalke Str. 17, Berlin, Germany
| | - Laurent Mène-Saffrané
- Department of Biology, University of Fribourg, Chemin du Musée 10, Fribourg, Switzerland
- Metabolomics and Proteomics Platform, University of Fribourg, Chemin du Musée 10, Fribourg, Switzerland
| | - Nicolas J Fasel
- Department of Evolutionary Ecology, Leibniz Institute for Zoo and Wildlife Research, Alfred Kowalke Str. 17, Berlin, Germany
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37
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Evano B, Tajbakhsh S. Skeletal muscle stem cells in comfort and stress. NPJ Regen Med 2018; 3:24. [PMID: 30588332 PMCID: PMC6303387 DOI: 10.1038/s41536-018-0062-3] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 11/28/2018] [Indexed: 12/21/2022] Open
Abstract
Investigations on developmental and regenerative myogenesis have led to major advances in decrypting stem cell properties and potential, as well as their interactions within the evolving niche. As a consequence, regenerative myogenesis has provided a forum to investigate intrinsic regulators of stem cell properties as well as extrinsic factors, including stromal cells, during normal growth and following injury and disease. Here we review some of the latest advances in the field that have exposed fundamental processes including regulation of stress following trauma and ageing, senescence, DNA damage control and modes of symmetric and asymmetric cell divisions. Recent studies have begun to explore the nature of the niche that is distinct in different muscle groups, and that is altered from prenatal to postnatal stages, and during ageing. We also discuss heterogeneities among muscle stem cells and how distinct properties within the quiescent and proliferating cell states might impact on homoeostasis and regeneration. Interestingly, cellular quiescence, which was thought to be a passive cell state, is regulated by multiple mechanisms, many of which are deregulated in various contexts including ageing. These and other factors including metabolic activity and genetic background can impact on the efficiency of muscle regeneration.
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Affiliation(s)
- Brendan Evano
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, 75015 Paris, France
- CNRS UMR 3738, Institut Pasteur, 75015 Paris, France
| | - Shahragim Tajbakhsh
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, 75015 Paris, France
- CNRS UMR 3738, Institut Pasteur, 75015 Paris, France
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38
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Javan GT, Finley SJ, Tuomisto S, Hall A, Benbow ME, Mills D. An interdisciplinary review of the thanatomicrobiome in human decomposition. Forensic Sci Med Pathol 2018; 15:75-83. [PMID: 30519986 DOI: 10.1007/s12024-018-0061-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2018] [Indexed: 01/21/2023]
Abstract
Death does not occur instantaneously and organs do not decompose at the same rate or in the same way. Nulligravid human uteri and prostate glands are the last internal organs to deteriorate during decomposition; however, the reason for this very important observation is still enigmatic. Recent studies have elucidated that the composition and abundance of microbes in the human thanatomicrobiome (microbiome of death) varies by organ and changes as a function of time and temperature. The ileocecal area has the largest absolute postmortem burden that spreads to the liver and spleen and continues to the heart and brain depending on the cause of death. To truly understand the mechanisms of microbial assembly during decomposition, a thorough examination of different strategies utilized by the trillions of microbes that colonize decaying tissues is needed from a multi-organ and multidisciplinary approach. In this review, we highlight interdisciplinary research and provide an overview of human decomposition investigations of thanatomicrobiomic changes in internal organs.
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Affiliation(s)
- Gulnaz T Javan
- Physical Sciences Department, Forensic Science Program, Alabama State University, 915 S. Jackson St., Hatch Hall Building Room 251, Montgomery, AL, 36104, USA.
| | - Sheree J Finley
- Physical Sciences Department, Forensic Science Program, Alabama State University, 915 S. Jackson St., Hatch Hall Building Room 251, Montgomery, AL, 36104, USA
| | - Sari Tuomisto
- Faculty of Medicine and Life Sciences, Department of Forensic Medicine, University of Tampere, Tampere, Finland
| | - Ashley Hall
- Department of Biopharmaceutical Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - M Eric Benbow
- Department of Entomology and Department of Osteopathic Medicine, Michigan State University, East Lansing, MI, USA
| | - DeEtta Mills
- Department of Biological Sciences, Florida International University, Miami, FL, USA
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39
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Balci-Hayta B, Bekircan-Kurt CE, Aksu E, Dayangac-Erden D, Tan E, Erdem-Ozdamar S. Establishment of primary myoblast cell cultures from cryopreserved skeletal muscle biopsies to serve as a tool in related research & development studies. J Neurol Sci 2018; 393:100-104. [PMID: 30153568 DOI: 10.1016/j.jns.2018.08.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 08/08/2018] [Accepted: 08/17/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Primary myoblast cell cultures display the phenotypic characteristics and genetic defects of the donor tissue and represent an in vitro model system reflecting the disease pathology. They have been generated only from freshly harvested tissue biopsies. Here, we describe a novel technique to establish myoblast cell cultures from cryopreserved skeletal muscle biopsy tissues that are useful for diagnostic and research purposes. METHODS AND RESULTS This protocol was performed on seven gradually frozen muscle biopsy specimens from various neuromuscular disorders that were stored in dimethylsulfoxide (DMSO)-supplemented freezing media at -80 °C for up to one year. After storage for varying periods of time, primary myoblast cultures were successfully established from all cryopreserved biopsy tissues without any chromosomal abnormality. Desmin immunoreactivity confirmed that the cell cultures contained >90% pure myoblasts. The myoblasts differentiated into multinucleated myotubes successfully. Furthermore, there were no statistically significant differences in cell viability, metabolic activity, population doubling time, and myocyte enhancer factor 2 (MEF2C) expression between cell cultures established from freshly harvested and one year-stored frozen tissue specimens. CONCLUSIONS This protocol opens up new horizons for basic research and the pre-clinical studies of novel therapies by using cryopreserved skeletal muscle biopsies stored under suitable conditions in tissue banks.
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Affiliation(s)
- Burcu Balci-Hayta
- Department of Medical Biology, Hacettepe University Faculty of Medicine, Sihhiye, 06100 Ankara, Turkey
| | - Can Ebru Bekircan-Kurt
- Department of Neurology and Neuromuscular Diseases Research Laboratory, Hacettepe University Faculty of Medicine, Sihhiye, 06100 Ankara, Turkey
| | - Evrim Aksu
- Department of Medical Biology, Hacettepe University Faculty of Medicine, Sihhiye, 06100 Ankara, Turkey
| | - Didem Dayangac-Erden
- Department of Medical Biology, Hacettepe University Faculty of Medicine, Sihhiye, 06100 Ankara, Turkey
| | - Ersin Tan
- Department of Neurology and Neuromuscular Diseases Research Laboratory, Hacettepe University Faculty of Medicine, Sihhiye, 06100 Ankara, Turkey.
| | - Sevim Erdem-Ozdamar
- Department of Neurology and Neuromuscular Diseases Research Laboratory, Hacettepe University Faculty of Medicine, Sihhiye, 06100 Ankara, Turkey
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40
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Riddle ES, Bender EL, Thalacker-Mercer AE. Expansion capacity of human muscle progenitor cells differs by age, sex, and metabolic fuel preference. Am J Physiol Cell Physiol 2018; 315:C643-C652. [PMID: 30110562 DOI: 10.1152/ajpcell.00135.2018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Activation of satellite cells and expansion of the muscle progenitor cell (MPC) population are essential to generate a sufficient number of cells to repair damaged skeletal muscle. Proliferating MPCs have high energetic and biosynthetic material requirements, and the ability to utilize oxidative phosphorylation (OXPHOS) and/or glycolysis may affect expansion capacity of MPCs. In the present study, we investigated the effect of donor age and sex on human (h)MPC expansion capacity and metabolic fuel preference. hMPCs from young and old male and female donors were grown for 408 h (17 days). Percent confluence, live nuclei count, and dead cell count were measured every 24 h. Metabolic phenotype was assessed by glucose uptake, expression of genes related to glycolysis and OXPHOS, and the Seahorse XF24 Phenotype Test Kit during the exponential phase of growth. hMPCs from old male donors had impaired expansion capacity secondary to heightened cell death early in expansion compared with hMPCs from young male donors, an effect not observed in female hMPCs. Age-related differences in metabolism were also sex dependent; markers of OXPHOS were altered in old (vs. young) male hMPCs, whereas markers of metabolism were largely unaffected by age in female hMPCs. For the first time, we identify sex-specific differences in cell death and OXPHOS that contribute to impaired expansion capacity of hMPC cell populations with age.
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Affiliation(s)
- Emily S Riddle
- Division of Nutritional Sciences, Cornell University , Ithaca, New York
| | - Erica L Bender
- Division of Nutritional Sciences, Cornell University , Ithaca, New York
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41
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L'honoré A, Commère PH, Negroni E, Pallafacchina G, Friguet B, Drouin J, Buckingham M, Montarras D. The role of Pitx2 and Pitx3 in muscle stem cells gives new insights into P38α MAP kinase and redox regulation of muscle regeneration. eLife 2018; 7:e32991. [PMID: 30106373 PMCID: PMC6191287 DOI: 10.7554/elife.32991] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 08/01/2018] [Indexed: 12/13/2022] Open
Abstract
Skeletal muscle regeneration depends on satellite cells. After injury these muscle stem cells exit quiescence, proliferate and differentiate to regenerate damaged fibres. We show that this progression is accompanied by metabolic changes leading to increased production of reactive oxygen species (ROS). Using Pitx2/3 single and double mutant mice that provide genetic models of deregulated redox states, we demonstrate that moderate overproduction of ROS results in premature differentiation of satellite cells while high levels lead to their senescence and regenerative failure. Using the ROS scavenger, N-Acetyl-Cysteine (NAC), in primary cultures we show that a physiological increase in ROS is required for satellite cells to exit the cell cycle and initiate differentiation through the redox activation of p38α MAP kinase. Subjecting cultured satellite cells to transient inhibition of P38α MAP kinase in conjunction with NAC treatment leads to their rapid expansion, with striking improvement of their regenerative potential in grafting experiments.
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Affiliation(s)
- Aurore L'honoré
- Department of Developmental and Stem Cell Biology, CNRS, UMR 3738Institut PasteurParisFrance
- Biological Adaptation and Aging-IBPS, CNRS UMR 8256, INSERM ERL U1164Sorbonne Universités, Université Pierre et Marie CurieParisFrance
| | | | - Elisa Negroni
- Center for Research in MyologySorbonne Universités, Université Pierre et Marie CurieParisFrance
| | - Giorgia Pallafacchina
- NeuroscienceInstitute, Department of Biomedical Sciences, Italian National Research CouncilUniversityof PadovaPadovaItaly
| | - Bertrand Friguet
- Biological Adaptation and Aging-IBPS, CNRS UMR 8256, INSERM ERL U1164Sorbonne Universités, Université Pierre et Marie CurieParisFrance
| | - Jacques Drouin
- Laboratory of Molecular GeneticsInstitut de Recherches Cliniques de MontréalMontréalCanada
| | - Margaret Buckingham
- Department of Developmental and Stem Cell Biology, CNRS, UMR 3738Institut PasteurParisFrance
| | - Didier Montarras
- Department of Developmental and Stem Cell Biology, CNRS, UMR 3738Institut PasteurParisFrance
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42
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Pala F, Di Girolamo D, Mella S, Yennek S, Chatre L, Ricchetti M, Tajbakhsh S. Distinct metabolic states govern skeletal muscle stem cell fates during prenatal and postnatal myogenesis. J Cell Sci 2018; 131:131/14/jcs212977. [PMID: 30054310 PMCID: PMC6080609 DOI: 10.1242/jcs.212977] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 04/18/2018] [Indexed: 12/19/2022] Open
Abstract
During growth, homeostasis and regeneration, stem cells are exposed to different energy demands. Here, we characterise the metabolic pathways that mediate the commitment and differentiation of mouse skeletal muscle stem cells, and how their modulation can influence the cell state. We show that quiescent satellite stem cells have low energetic demands and perturbed oxidative phosphorylation during ageing, which is also the case for cells from post-mortem tissues. We show also that myogenic fetal cells have distinct metabolic requirements compared to those proliferating during regeneration, with the former displaying a low respiration demand relying mostly on glycolysis. Furthermore, we show distinct requirements for peroxisomal and mitochondrial fatty acid oxidation (FAO) in myogenic cells. Compromising peroxisomal but not mitochondrial FAO promotes early differentiation of myogenic cells. Acute muscle injury and pharmacological block of peroxisomal and mitochondrial FAO expose differential requirements for these organelles during muscle regeneration. Taken together, these observations indicate that changes in myogenic cell state lead to significant alterations in metabolic requirements. In addition, perturbing specific metabolic pathways impacts on myogenic cell fates and the regeneration process. Summary: Distinct energy metabolism pathways act during mouse skeletal muscle stem cell commitment and differentiation in different physiological states.
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Affiliation(s)
- Francesca Pala
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France.,CNRS UMR 3738, Institut Pasteur, Paris 75015, France
| | - Daniela Di Girolamo
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France.,CNRS UMR 3738, Institut Pasteur, Paris 75015, France.,Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli "Federico II", Via S. Pansini 5, 80131 Napoli, Italy
| | - Sébastien Mella
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France.,CNRS UMR 3738, Institut Pasteur, Paris 75015, France
| | - Siham Yennek
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France.,CNRS UMR 3738, Institut Pasteur, Paris 75015, France
| | - Laurent Chatre
- CNRS UMR 3738, Institut Pasteur, Paris 75015, France.,Stem Cells and Development, Team Stability of Nuclear and Mitochondrial DNA, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France
| | - Miria Ricchetti
- CNRS UMR 3738, Institut Pasteur, Paris 75015, France.,Stem Cells and Development, Team Stability of Nuclear and Mitochondrial DNA, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France
| | - Shahragim Tajbakhsh
- Stem Cells and Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, Paris 75015, France .,CNRS UMR 3738, Institut Pasteur, Paris 75015, France
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43
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Stewart AM, Cook MS, Dyer KY, Alperin M. Structure-function relationship of the human external anal sphincter. Int Urogynecol J 2018; 29:673-678. [PMID: 28689239 PMCID: PMC5889349 DOI: 10.1007/s00192-017-3404-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 06/14/2017] [Indexed: 12/17/2022]
Abstract
INTRODUCTION AND HYPOTHESIS Obstetrical external anal sphincter (EAS) injury and subsequent dysfunction are leading risk factors for female fecal incontinence (FI). Limited knowledge of the EAS structure-function relationship hinders treatment optimization. We directly measured functionally relevant intrinsic parameters of human EAS and tested whether vaginal delivery alters the EAS structure-function relationship. METHODS Major predictors of in vivo EAS function were compared between specimens procured from vaginally nulliparous (VN, n = 5) and vaginally parous (VP, n = 7) cadaveric donors: operational sarcomere length (Ls), which dictates force-length relationship; physiological cross-sectional area (PCSA), which determines isometric force-generating capacity; fiber length (Lfn), responsible for muscle excursion and contractile velocity; and muscle stiffness. Data were analyzed using unpaired and paired t tests, α < 0.05. Results are presented as mean ± SEM. RESULTS The VN and VP (median parity 3) groups were similar in age and BMI. No gross anatomical defects were identified. EAS Ls (2.36 ± 0.05 μm) was shorter than the optimal Lso (2.7 μm), at which contractile force is maximal, P = 0.0001. Stiffness was lower at Ls than Lso (5.4 ± 14 kPa/μm vs 35.3 ± 12 kPa/μm, P < 0.0001). This structural design allows active and passive tension to increase with EAS stretching. EAS relatively long Lfn (106 ± 24.8 mm) permits rapid contraction without decreased force, whereas intermediate PCSA (1.3 ± 0.3 cm2) is conducive to maintaining resting tone. All parameters were similar between groups. CONCLUSIONS This first direct examination of human EAS underscores how EAS intrinsic design matches its intended function. Knowledge of the EAS structure-function relationship is important for understanding the pathogenesis of FI and the optimization of treatments for EAS dysfunction.
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Affiliation(s)
- Amanda M Stewart
- Department of Reproductive Medicine, University of California San Diego, San Diego, CA, USA
| | - Mark S Cook
- Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA
| | - Keisha Y Dyer
- Female Pelvic Medicine and Reconstructive Surgery, Kaiser Permanente, San Diego, CA, USA
- Department of Reproductive Medicine, Division of Urogynecology and Pelvic Reconstructive Surgery, University of California San Diego, San Diego, CA, USA
| | - Marianna Alperin
- Department of Reproductive Medicine, Division of Urogynecology and Pelvic Reconstructive Surgery, University of California San Diego, San Diego, CA, USA.
- University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0863, USA.
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44
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Xie L, Yin A, Nichenko AS, Beedle AM, Call JA, Yin H. Transient HIF2A inhibition promotes satellite cell proliferation and muscle regeneration. J Clin Invest 2018. [PMID: 29533927 PMCID: PMC5983316 DOI: 10.1172/jci96208] [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] [Indexed: 01/06/2023] Open
Abstract
The remarkable regeneration capability of skeletal muscle depends on the coordinated proliferation and differentiation of satellite cells (SCs). The self-renewal of SCs is critical for long-term maintenance of muscle regeneration potential. Hypoxia profoundly affects the proliferation, differentiation, and self-renewal of cultured myoblasts. However, the physiological relevance of hypoxia and hypoxia signaling in SCs in vivo remains largely unknown. Here, we demonstrate that SCs are in an intrinsic hypoxic state in vivo and express hypoxia-inducible factor 2A (HIF2A). HIF2A promotes the stemness and long-term homeostatic maintenance of SCs by maintaining their quiescence, increasing their self-renewal, and blocking their myogenic differentiation. HIF2A stabilization in SCs cultured under normoxia augments their engraftment potential in regenerative muscle. Conversely, HIF2A ablation leads to the depletion of SCs and their consequent regenerative failure in the long-term. In contrast, transient pharmacological inhibition of HIF2A accelerates muscle regeneration by increasing SC proliferation and differentiation. Mechanistically, HIF2A induces the quiescence and self-renewal of SCs by binding the promoter of the Spry1 gene and activating Spry1 expression. These findings suggest that HIF2A is a pivotal mediator of hypoxia signaling in SCs and may be therapeutically targeted to improve muscle regeneration.
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Affiliation(s)
- Liwei Xie
- Department of Biochemistry and Molecular Biology.,Center for Molecular Medicine, and
| | - Amelia Yin
- Department of Biochemistry and Molecular Biology.,Center for Molecular Medicine, and
| | - Anna S Nichenko
- Department of Kinesiology, The University of Georgia, Athens, Georgia, USA
| | - Aaron M Beedle
- Department of Pharmaceutical Sciences, Binghamton University-SUNY, Binghamton, New York, USA
| | - Jarrod A Call
- Department of Kinesiology, The University of Georgia, Athens, Georgia, USA.,Regenerative Bioscience Center, The University of Georgia, Athens, Georgia, USA
| | - Hang Yin
- Department of Biochemistry and Molecular Biology.,Center for Molecular Medicine, and
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45
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Charlier P, Annane D. Time for a new definition of death? Resuscitation 2018; 127:e14-e15. [PMID: 29678611 DOI: 10.1016/j.resuscitation.2018.04.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 04/10/2018] [Indexed: 11/16/2022]
Affiliation(s)
- Philippe Charlier
- Section of Medical Anthropology (DANTE Laboratory EA4498, UVSQ), UFR of Health Sciences, 2 avenue de la Source de la Bièvre, 78180 Montigny-Le-Bretonneux, France; CASH & IPES, 403 avenue de la République, 92000 Nanterre, France; Quai Branly Museum, 222 rue de l'Université, 75007 Paris, France.
| | - Djillali Annane
- Resuscitation Department, University Hospital Raymond Poincaré (AP-HP, UVSQ), 92380 Garches, France
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46
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Sutcu HH, Ricchetti M. Loss of heterogeneity, quiescence, and differentiation in muscle stem cells. Stem Cell Investig 2018; 5:9. [PMID: 29780813 DOI: 10.21037/sci.2018.03.02] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 12/15/2022]
Abstract
Skeletal muscle stem cells in the adult display heterogeneity that has been functionally linked to their behavior, self-renewal capacity, and resistance to stress in hostile environments. Behavioral heterogeneity emerges also during developmental myogenesis. Muscle stem cell diversity may be functionally linked to the changing needs of skeletal muscle regeneration. Intriguingly, dramatic reduction of stem cell diversity, the "clonal drift", that implies loss of stem cells and related expansion of clonally related stem cells has been reported for tissue replacement in several adult tissues and suggested in the zebrafish embryo. A recent study shows clonal drift of muscle stem cells in the zebrafish embryo caused by inhibition of the cell cycle and directed by the homeobox protein Meox1. Although stem cell quiescence is associated with inhibition of the transition phase G0/G1 of the cell cycle, Meox1 triggers the muscle stem cell fate by an arrest in G2 phase. Why efficient muscle growth in the zebrafish embryo requires sacrificing stem cell heterogeneity in favor of a small number of dominant clones has not been elucidated. The significance of G2-halted stem cells, which are generally associated with robust regeneration capacity, is also intriguing. These processes are relevant for understanding organ growth and the mechanisms that govern stem cell quiescence.
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Affiliation(s)
- Haser Hasan Sutcu
- Stem Cells and Development, Team "Stability of Nuclear and Mitochondrial DNA", Institut Pasteur, Paris, France.,CNRS UMR3738, Paris, France.,University Pierre and Marie Curie (Sorbonne Universities, ED515), Paris, France
| | - Miria Ricchetti
- Stem Cells and Development, Team "Stability of Nuclear and Mitochondrial DNA", Institut Pasteur, Paris, France.,CNRS UMR3738, Paris, France
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47
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Čamernik K, Barlič A, Drobnič M, Marc J, Jeras M, Zupan J. Mesenchymal Stem Cells in the Musculoskeletal System: From Animal Models to Human Tissue Regeneration? Stem Cell Rev Rep 2018; 14:346-369. [DOI: 10.1007/s12015-018-9800-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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48
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Garcia SM, Tamaki S, Lee S, Wong A, Jose A, Dreux J, Kouklis G, Sbitany H, Seth R, Knott PD, Heaton C, Ryan WR, Kim EA, Hansen SL, Hoffman WY, Pomerantz JH. High-Yield Purification, Preservation, and Serial Transplantation of Human Satellite Cells. Stem Cell Reports 2018; 10:1160-1174. [PMID: 29478895 PMCID: PMC5918346 DOI: 10.1016/j.stemcr.2018.01.022] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/19/2018] [Accepted: 01/22/2018] [Indexed: 02/03/2023] Open
Abstract
Investigation of human muscle regeneration requires robust methods to purify and transplant muscle stem and progenitor cells that collectively constitute the human satellite cell (HuSC) pool. Existing approaches have yet to make HuSCs widely accessible for researchers, and as a result human muscle stem cell research has advanced slowly. Here, we describe a robust and predictable HuSC purification process that is effective for each human skeletal muscle tested and the development of storage protocols and transplantation models in dystrophin-deficient and wild-type recipients. Enzymatic digestion, magnetic column depletion, and 6-marker flow-cytometric purification enable separation of 104 highly enriched HuSCs per gram of muscle. Cryostorage of HuSCs preserves viability, phenotype, and transplantation potential. Development of enhanced and species-specific transplantation protocols enabled serial HuSC xenotransplantation and recovery. These protocols and models provide an accessible system for basic and translational investigation and clinical development of HuSCs. High-efficiency purification permits serial transplantation of human satellite stem cells Cryopreservation preserves satellite cell function and phenotype 1 gram of adult skeletal muscle yields 104 highly purified satellite cells Purified uncultured endogenous human satellite cells can be stored and shared
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Affiliation(s)
- Steven M Garcia
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Stanley Tamaki
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Solomon Lee
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Alvin Wong
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Anthony Jose
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Joanna Dreux
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Gayle Kouklis
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Hani Sbitany
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Rahul Seth
- Department of Otolaryngology - Head and Neck Surgery, University of California, San Francisco, CA 94143, USA
| | - P Daniel Knott
- Department of Otolaryngology - Head and Neck Surgery, University of California, San Francisco, CA 94143, USA
| | - Chase Heaton
- Department of Otolaryngology - Head and Neck Surgery, University of California, San Francisco, CA 94143, USA
| | - William R Ryan
- Department of Otolaryngology - Head and Neck Surgery, University of California, San Francisco, CA 94143, USA
| | - Esther A Kim
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Scott L Hansen
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - William Y Hoffman
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of California, San Francisco, CA 94143, USA
| | - Jason H Pomerantz
- Departments of Surgery and Orofacial Sciences, Division of Plastic and Reconstructive Surgery, Program in Craniofacial Biology, Eli and Edythe Broad Center of Regeneration Medicine, University of California, San Francisco, CA 94143, USA.
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Abstract
Mitochondrial DNA (mtDNA), which is essential for mitochondrial and cell function, is replicated and transcribed in the organelle by proteins that are entirely coded in the nucleus. Replication of mtDNA is challenged not only by threats related to the replication machinery and orchestration of DNA synthesis, but also by factors linked to the peculiarity of this genome. Indeed the architecture, organization, copy number, and location of mtDNA, which are markedly distinct from the nuclear genome, require ad hoc and complex regulation to ensure coordinated replication. As a consequence sub-optimal mtDNA replication, which results from compromised regulation of these factors, is generally associated with mitochondrial dysfunction and disease. Mitochondrial DNA replication should be considered in the context of the organelle and the whole cell, and not just a single genome or a single replication event. Major threats to mtDNA replication are linked to its dependence on both mitochondrial and nuclear factors, which require exquisite coordination of these crucial subcellular compartments. Moreover, regulation of replication events deals with a dynamic population of multiple mtDNA molecules rather than with a fixed number of genome copies, as it is the case for nuclear DNA. Importantly, the mechanistic aspects of mtDNA replication are still debated. We describe here major challenges for human mtDNA replication, the mechanistic aspects of the process that are to a large extent original, and their consequences on disease.
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Affiliation(s)
- Miria Ricchetti
- Institut Pasteur, Department of Developmental and Stem Cell Biology, Stem Cells and Development, 75724 Cedex15, Paris, France; Team Stability of Nuclear and Mitochondrial DNA, CNRS UMR 3738, 75724, Cedex15, Paris, France.
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50
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Baghdadi MB, Tajbakhsh S. Regulation and phylogeny of skeletal muscle regeneration. Dev Biol 2018; 433:200-209. [DOI: 10.1016/j.ydbio.2017.07.026] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/30/2017] [Accepted: 07/31/2017] [Indexed: 12/31/2022]
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