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Geara P, Dilworth FJ. Epigenetic integration of signaling from the regenerative environment. Curr Top Dev Biol 2024; 158:341-374. [PMID: 38670712 DOI: 10.1016/bs.ctdb.2024.02.003] [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
Skeletal muscle has an extraordinary capacity to regenerate itself after injury due to the presence of tissue-resident muscle stem cells. While these muscle stem cells are the primary contributor to the regenerated myofibers, the process occurs in a regenerative microenvironment where multiple different cell types act in a coordinated manner to clear the damaged myofibers and restore tissue homeostasis. In this regenerative environment, immune cells play a well-characterized role in initiating repair by establishing an inflammatory state that permits the removal of dead cells and necrotic muscle tissue at the injury site. More recently, it has come to be appreciated that the immune cells also play a crucial role in communicating with the stem cells within the regenerative environment to help coordinate the timing of repair events through the secretion of cytokines, chemokines, and growth factors. Evidence also suggests that stem cells can help modulate the extent of the inflammatory response by signaling to the immune cells, demonstrating a cross-talk between the different cells in the regenerative environment. Here, we review the current knowledge on the innate immune response to sterile muscle injury and provide insight into the epigenetic mechanisms used by the cells in the regenerative niche to integrate the cellular cross-talk required for efficient muscle repair.
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Affiliation(s)
- Perla Geara
- Department of Cell and Regenerative Biology, University of Wisconsin, Madison, WI, United States
| | - F Jeffrey Dilworth
- Department of Cell and Regenerative Biology, University of Wisconsin, Madison, WI, United States.
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2
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Fujita R, Mizuno S, Sadahiro T, Hayashi T, Sugasawa T, Sugiyama F, Ono Y, Takahashi S, Ieda M. Generation of a MyoD knock-in reporter mouse line to study muscle stem cell dynamics and heterogeneity. iScience 2023; 26:106592. [PMID: 37250337 PMCID: PMC10214404 DOI: 10.1016/j.isci.2023.106592] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 02/19/2023] [Accepted: 03/31/2023] [Indexed: 05/31/2023] Open
Abstract
Myoblast determination protein 1 (MyoD) dynamics define the activation status of muscle stem cells (MuSCs), aiding in muscle tissue regeneration after injury. However, the lack of experimental platforms to monitor MyoD dynamics in vitro and in vivo has hampered the investigation of fate determination and heterogeneity of MuSCs. Herein, we report a MyoD knock-in (MyoD-KI) reporter mouse expressing tdTomato at the endogenous MyoD locus. Expression of tdTomato in MyoD-KI mice recapitulated the endogenous MyoD expression dynamics in vitro and during the early phase of regeneration in vivo. Additionally, we showed that tdTomato fluorescence intensity defines MuSC activation status without immunostaining. Based on these features, we developed a high-throughput screening system to assess the effects of drugs on the behavior of MuSCs in vitro. Thus, MyoD-KI mice are an invaluable resource for studying the dynamics of MuSCs, including their fate decisions and heterogeneity, and for drug screening in stem cell therapy.
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Affiliation(s)
- Ryo Fujita
- Division of Regenerative Medicine, Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
- Department of Cardiology, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Seiya Mizuno
- Laboratory Animal Resource Center, Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Taketaro Sadahiro
- Department of Cardiology, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Takuto Hayashi
- Department of Anatomy and Embryology, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Takehito Sugasawa
- Laboratory of Clinical Examination and Sports Medicine, Department of Clinical Medicine, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Fumihiro Sugiyama
- Laboratory Animal Resource Center, Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Yusuke Ono
- Department of Muscle Development and Regeneration, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto 860-0811, Japan
| | - Satoru Takahashi
- Laboratory Animal Resource Center, Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
- Department of Anatomy and Embryology, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Masaki Ieda
- Department of Cardiology, Institute of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
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Yeh CJ, Sattler KM, Lepper C. Molecular regulation of satellite cells via intercellular signaling. Gene 2023; 858:147172. [PMID: 36621659 PMCID: PMC9928918 DOI: 10.1016/j.gene.2023.147172] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/21/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023]
Abstract
Somatic stem cells are tissue-specific reserve cells tasked to sustain tissue homeostasis in adulthood and/or effect tissue regeneration after traumatic injury. The stem cells of skeletal muscle tissue are the satellite cells, which were originally described and named after their localization beneath the muscle fiber lamina and attached to the multi-nucleated muscle fibers. During adult homeostasis, satellite cells are maintained in quiescence, a state of reversible cell cycle arrest. Yet, upon injury, satellite cells are rapidly activated, becoming highly mitotically active to generate large numbers of myoblasts that differentiate and fuse to regenerate the injured muscle fibers. A subset self-renews to replenish the pool of muscle stem cells.Complex intrinsic gene regulatory networks maintain the quiescent state of satellite cells, or upon injury, direct their activation, proliferation, differentiation and self-renewal. Molecular cues from the satellite cells' environment provide the essential information as to when and where satellite cells are to stay quiescent or break quiescence and effect regenerative myogenesis. Predominantly, these cues are secreted, diffusible or membrane-bound ligands that bind to and activate their specific cognate receptors on the satellite cell to activate downstream signaling cascades and elicit context-specific cell behavior. This review aims to offer a concise overview of major intercellular signaling pathways regulating satellite cells during quiescence and in injury-induced skeletal muscle regeneration.
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Affiliation(s)
- Chung-Ju Yeh
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, United States
| | - Kristina M Sattler
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, United States
| | - Christoph Lepper
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH, United States.
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Shams AS, Arpke RW, Gearhart MD, Weiblen J, Mai B, Oyler D, Bosnakovski D, Mahmoud OM, Hassan GM, Kyba M. The chemokine receptor CXCR4 regulates satellite cell activation, early expansion, and self-renewal, in response to skeletal muscle injury. Front Cell Dev Biol 2022; 10:949532. [PMID: 36211464 PMCID: PMC9536311 DOI: 10.3389/fcell.2022.949532] [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: 05/21/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
Acute skeletal muscle injury is followed by satellite cell activation, proliferation, and differentiation to replace damaged fibers with newly regenerated muscle fibers, processes that involve satellite cell interactions with various niche signals. Here we show that satellite cell specific deletion of the chemokine receptor CXCR4, followed by suppression of recombination escapers, leads to defects in regeneration and satellite cell pool repopulation in both the transplantation and in situ injury contexts. Mechanistically, we show that endothelial cells and FAPs express the gene for the ligand, SDF1α, and that CXCR4 is principally required for proper activation and for transit through the first cell division, and to a lesser extent the later cell divisions. In the absence of CXCR4, gene expression in quiescent satellite cells is not severely disrupted, but in activated satellite cells a subset of genes normally induced by activation fail to upregulate normally. These data demonstrate that CXCR4 signaling is essential to normal early activation, proliferation, and self-renewal of satellite cells.
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Affiliation(s)
- Ahmed S. Shams
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Robert W. Arpke
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - Micah D. Gearhart
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, United States
| | - Johannes Weiblen
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - Ben Mai
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - David Oyler
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - Darko Bosnakovski
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - Omayma M. Mahmoud
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Gamal M. Hassan
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Michael Kyba
- Lillehei Heart Institute, Minneapolis, MN, United States
- Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
- *Correspondence: Michael Kyba,
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Sakai H, Sawada Y, Tokunaga N, Tanaka K, Nakagawa S, Sakakibara I, Ono Y, Fukada SI, Ohkawa Y, Kikugawa T, Saika T, Imai Y. Uhrf1 governs the proliferation and differentiation of muscle satellite cells. iScience 2022; 25:103928. [PMID: 35243267 PMCID: PMC8886052 DOI: 10.1016/j.isci.2022.103928] [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: 04/20/2021] [Revised: 12/06/2021] [Accepted: 02/10/2022] [Indexed: 11/19/2022] Open
Abstract
DNA methylation is an essential form of epigenetic regulation responsible for cellular identity. In muscle stem cells, termed satellite cells, DNA methylation patterns are tightly regulated during differentiation. However, it is unclear how these DNA methylation patterns affect the function of satellite cells. We demonstrate that a key epigenetic regulator, ubiquitin like with PHD and RING finger domains 1 (Uhrf1), is activated in proliferating myogenic cells but not expressed in quiescent satellite cells or differentiated myogenic cells in mice. Ablation of Uhrf1 in mouse satellite cells impairs their proliferation and differentiation, leading to failed muscle regeneration. Uhrf1-deficient myogenic cells exhibited aberrant upregulation of transcripts, including Sox9, with the reduction of DNA methylation level of their promoter and enhancer region. These findings show that Uhrf1 is a critical epigenetic regulator of proliferation and differentiation in satellite cells, by controlling cell-type-specific gene expression via maintenance of DNA methylation. Uhrf1 is activated in proliferating myogenic cells Uhrf1 in satellite cells is required for muscle regeneration Ablation of Uhrf1 in satellite cells impairs their proliferation and differentiation Uhrf1 controls cell-type-specific transcripts via maintenance of DNA methylation
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Affiliation(s)
- Hiroshi Sakai
- Division of Integrative Pathophysiology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan
- Department of Pathophysiology, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
- Corresponding author
| | - Yuichiro Sawada
- Department of Urology, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - Naohito Tokunaga
- Division of Analytical Bio-Medicine, Advanced Research Support Center, Ehime University, Toon, Ehime 791-0295, Japan
| | - Kaori Tanaka
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka 812-0054, Japan
| | - So Nakagawa
- Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan
| | - Iori Sakakibara
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Kuramoto-cho, Tokushima 770-8503, Japan
| | - Yusuke Ono
- Department of Muscle Development and Regeneration, Institute of Molecular Embryology and Genetics, Kumamoto University, Honjo, Kumamoto 860-0811, Japan
| | - So-ichiro Fukada
- Project for Muscle Stem Cell Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasuyuki Ohkawa
- Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka 812-0054, Japan
| | - Tadahiko Kikugawa
- Department of Urology, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - Takashi Saika
- Department of Urology, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - Yuuki Imai
- Division of Integrative Pathophysiology, Proteo-Science Center, Ehime University, Toon, Ehime 791-0295, Japan
- Department of Pathophysiology, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
- Corresponding author
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Proliferin-1 Ameliorates Cardiotoxin-Related Skeletal Muscle Repair in Mice. Stem Cells Int 2021; 2021:9202990. [PMID: 34950212 PMCID: PMC8692050 DOI: 10.1155/2021/9202990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/22/2021] [Accepted: 10/28/2021] [Indexed: 12/29/2022] Open
Abstract
Background We recently demonstrated that proliferin-1 (PLF-1) functions as an apoptotic cell-derived growth factor and plays an important role in vascular pathobiology. We therefore investigated its role in muscle regeneration in response to cardiotoxin injury. Methods and Results To determine the effects of PLF-1 on muscle regeneration, we used a CTX-induced skeletal muscle injury model in 9-week-old male mice that were administered with the recombinant PLF-1 (rPLF-1) or neutralizing PLF-1 antibody. The injured muscles exhibited increased levels of PLF-1 gene expression in a time-dependent manner. On day 14 after injury, rPLF-1 supplementation ameliorated CTX-induced alterations in muscle fiber size, interstitial fibrosis, muscle regeneration capacity, and muscle performance. On day 3 postinjury, rPLF-1 increased the levels of proteins or genes for p-Akt, p-mTOR, p-GSK3α/β, p-Erk1/2, p-p38MAPK, interleukin-10, Pax7, MyoD, and Cyclin B1, and it increased the numbers of CD34+/integrin-α7+ muscle stem cells and proliferating cells in the muscles and/or bone marrow of CTX mice. An enzyme-linked immunosorbent assay revealed that rPLF-1 suppressed the levels of plasma tumor necrosis factor-α and interleukin-1β in CTX mice. PLF-1 blocking accelerated CTX-related muscle damage and dysfunction. In C2C12 myoblasts, rPLF-1 increased the levels of proteins for p-Akt, p-mTOR, p-GSK3α/β, p-Erk1/2, and p-p38MAPK as well as cellular functions; and these effects were diminished by the depletion of PLF-1 or silencing of its mannose-6-phosphate receptor. Conclusions These findings demonstrated that PLF-1 can improve skeletal muscle repair in response to injury, possibly via the modulation of inflammation and proliferation and regeneration, suggesting a novel therapeutic strategy for the management of skeletal muscle diseases.
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