• Activated satellite cells initially proliferate as skeletal myoblasts before undergoing myogenic differentiation. (wikipedia.org)
  • However, Pax7 is expressed prominently after satellite cell differentiation. (wikipedia.org)
  • These dividing cells are known as the "transit amplifying pool" before undergoing myogenic differentiation to form new (post-mitotic) myotubes. (wikipedia.org)
  • One of the first roles described for IGF-1 was its involvement in the proliferation and differentiation of satellite cells. (wikipedia.org)
  • The transcription factor CCAAT/enhancer binding protein beta (C/EBPβ) is expressed in Pax7 + satellite cells of healthy muscle and is downregulated during myoblast differentiation. (biomedcentral.com)
  • Persistent expression of C/EBPβ upregulates Pax7, inhibits MyoD, and blocks myogenic differentiation. (biomedcentral.com)
  • CCAAT/enhancer binding proteins (C/EBPs) are a family of transcription factors that regulate cellular growth and differentiation, metabolism, and inflammation [ 18 ]. (biomedcentral.com)
  • When overexpressed in the murine myoblast cell line C2C12 or in primary myoblasts, C/EBPβ reduced MyoD and other myogenic protein levels during differentiation, in addition to reducing myoblast fusion. (biomedcentral.com)
  • Their fate is regulated by the expression of various transcription factors, including paired box 7 (Pax7) and myogenic differentiation (MyoD) [ 6 ]. (biomedcentral.com)
  • Using synchronized cultures of C2C12 myoblasts to model these divergent programs, we show that p8 (also known as Nupr1 ), a G1-induced gene, negatively regulates the cell cycle and promotes myogenic differentiation. (biologists.com)
  • Greater activation also results in increased expression of myogenic basic helix-loop-helix transcription factors MyoD, myogenin, and MRF4 - all responsible for the induction of myocyte-specific genes. (wikipedia.org)
  • In the resected muscle and in the passively stretched antagonist muscle, there was a dramatic increase in the number of myofibers positive for neonatal MyHC and in the number of BrdU- and MyoD-positive satellite cells. (arvojournals.org)
  • In addition, IGF-1 expression in skeletal muscle extends the capacity to activate satellite cell proliferation (Charkravarthy, et al. (wikipedia.org)
  • Proliferating, BrdU-positive cells in muscle sections were detected with immunohistochemistry indicating different cell types and decreasing proliferation with age. (nature.com)
  • Cell culture experiments indicated that Gln could promote cell proliferation in a dose dependent manner, but expression of myogenesis regulatory genes was not altered. (nature.com)
  • Overall, Gln supplementation stimulated cell proliferation in muscle tissue and in vitro in myogenic cell culture, whereas muscle growth regulatory genes were barely altered. (nature.com)
  • 6 These manipulations result in satellite cell activation and proliferation, which in turn are responsible for muscle repair and regeneration. (arvojournals.org)
  • A single, early local administration of high-dose bFGF prevented atrophic changes in the thyroarytenoid muscles by activating satellite cell proliferation and reforming neuromuscular junctions. (biomedcentral.com)
  • WAT is characterised by its capacity to adapt and expand in response to surplus energy through processes of adipocyte hypertrophy and/or recruitment and proliferation of precursor cells in combination with vascular and extracellular matrix remodelling. (springer.com)
  • Hepatocyte growth factor (HGF) is produced by stromal and mesenchymal cells, and it stimulates epithelial cell proliferation, motility, morphogenesis and angiogenesis in various organs via tyrosine phosphorylation of its cognate receptor, Met. (spandidos-publications.com)
  • Satellite cells are precursors to skeletal muscle cells, able to give rise to satellite cells or differentiated skeletal muscle cells. (wikipedia.org)
  • Satellite cells (SCs), which are precursors of skeletal muscles, such as the TA muscle, play a key role in muscle homeostasis and regeneration. (biomedcentral.com)
  • These cells represent the oldest known adult stem cell niche, and are involved in the normal growth of muscle, as well as regeneration following injury or disease. (wikipedia.org)
  • Using genetic tools to conditionally abrogate C/EBPβ expression in Pax7 + cells, we examined the role of C/EBPβ in self-renewal of satellite cells during muscle regeneration. (biomedcentral.com)
  • After a single muscle injury, C/EBPβ-deficient satellite cells fail to self-renew resulting in a reduction of satellite cells available for future rounds of regeneration. (biomedcentral.com)
  • These findings demonstrate that C/EBPβ is a novel regulator of satellite cell self-renewal during muscle regeneration acting at least in part through Notch2. (biomedcentral.com)
  • 1 2 Residing outside the sarcolemma but within the basal lamina of individual myofibers is a population of cells that are responsible for muscle repair and regeneration, the satellite cells. (arvojournals.org)
  • Conditional Met KO mice were generated using Cre‑loxP methodology and characterization of these mice indicated that the HGF‑Met signaling pathway is essential in regeneration, protection, and homeostasis in various tissue types and cells. (spandidos-publications.com)
  • Feeding with amino acids can stimulate protein synthesis in all tissues, especially in skeletal muscle as reviewed by Davis et al. (nature.com)
  • Since the stability of the ZINC85592908 compound was greater than the MSTN control, we believe that ZINC85592908 has therapeutic potential against the MSTN protein and may hinder downstream singling by inhibiting the MSTN protein and increasing myogenesis in the skeletal muscle tissues. (bvsalud.org)
  • HGF is produced and secreted by adjacent stromal and mesenchymal cells, it contributes to the development of epithelial organs in a paracrine fashion, exerts regenerative effects on epithelia in the liver, kidney, lung, and other tissues, and promotes the regression of fibrosis in numerous organs ( 7 , 8 ). (spandidos-publications.com)
  • Jyotsna Dhawan ABSTRACT Adult stem cells persist in mammalian tissues by entering a state of reversible quiescence, referred to as G 0 , which is associated with low levels of transcription. (biologists.com)
  • Therefore, we propose that damage to and subsequent release of mtDNA elicits a protective signalling response that enhances nDNA repair in cells and tissues, suggesting that mtDNA is a genotoxic stress sentinel. (regenerativemedicine.net)
  • Understanding the effects of strabismus surgery on muscle cell biological reactions and myofiber remodeling may suggest new approaches for improving surgical outcomes. (arvojournals.org)
  • There are a number of factors that initiate myofiber remodeling in adult skeletal muscles. (arvojournals.org)
  • CD34 and Myf5 markers specifically define the majority of quiescent satellite cells. (wikipedia.org)
  • When muscle cells undergo injury, quiescent satellite cells are released from beneath the basement membrane. (wikipedia.org)
  • 10 Even more compelling is a recent study that subjected individual quiescent satellite cells isolated from adult limb muscle to stretching in vitro, and showed that direct stretching of the satellite cells themselves results in activation and bromodeoxyuridine (BrdU) incorporation. (arvojournals.org)
  • The basic fibroblast growth factor (bFGF) is a member of the fibroblast growth factor family and is a key protein in regenerative medicine. (biomedcentral.com)
  • To further define which neurons express Eph, antibodies were generated to the cytoplasmic portion of the Eph protein. (sdbonline.org)
  • Adult regenerative myogenesis is dependent on progenitor cells. (biologists.com)
  • Both active and passive stretch of the rectus muscles produced by strabismus surgery dramatically upregulated the processes of satellite cell activation, integration of new myonuclei into existing myofibers, and concomitant upregulation of immature myosin heavy chain isoforms. (arvojournals.org)
  • Postnatal growth and repair of skeletal muscle relies upon a population of quiescent muscle precursor cells, called satellite cells that can be activated to proliferate and differentiate into new myofibers, as well as self-renew to replenish the satellite cell population. (biomedcentral.com)
  • Myocyte nuclear factor (MNF), and c-met proto-oncogene (receptor for hepatocyte growth factor (HGF)) are less commonly used markers. (wikipedia.org)
  • Hepatocyte growth factor (HGF). (spandidos-publications.com)
  • Various growth factors, cytokines, and prostaglandins upregulate HGF gene expression, including basic fibroblast growth factor, oncostatin M, hypoxia-inducible factor 1α and nuclear factor-κB (NF-κB) ( 9 ). (spandidos-publications.com)
  • Skeletal muscle is a target tissue for anabolic steroids. (frontiersin.org)
  • Glutamine is regarded as the most abundant amino acid in the body, is mainly synthesized in skeletal muscle 10 , and muscle tissue is the most important site for Gln storage 11 . (nature.com)
  • Skeletal muscle is a complex tissue composed of thousands of individual multinucleated myofibers. (arvojournals.org)
  • Therefore, we complemented our investigations into the cellular development of the skeletal muscle of neonatal piglets with in vitro studies using a primary porcine myogenic cell culture model with Gln supplementation. (nature.com)
  • Satellite cells express a number of distinctive genetic markers. (wikipedia.org)
  • Such lack of clarity can be attributed to difficulty in isolating the individual events responsible for alterations in skeletal muscle, most of which occur simultaneously, among the multiple age-associated changes and co-morbidities associated with advanced age. (frontiersin.org)
  • Studies targeted at establishing such effects at cellular level and their correlations with in vivo models, will broaden our understanding of the roles played by androgens on skeletal muscle function in elderly. (frontiersin.org)
  • We observed a temporarily increased intramuscular availability of free Gln that could have influenced cellular processes in skeletal muscle. (nature.com)
  • Myosatellite cells, also known as satellite cells, muscle stem cells or MuSCs, are small multipotent cells with very little cytoplasm found in mature muscle. (wikipedia.org)
  • There is also evidence suggesting that these cells are capable of fusing with existing myofibers to facilitate growth and repair. (wikipedia.org)
  • Satellite cells proliferate following muscle trauma and form new myofibers through a process similar to fetal muscle development. (wikipedia.org)
  • 3 When a muscle is injured, this specialized cell population becomes activated, divides, and either repairs damaged fibers or forms new myofibers. (arvojournals.org)
  • Immunohistochemistry indicated that bFGF significantly increased the number of satellite cells in the thyroarytenoid muscle up to day 14 and that of neuromuscular junctions on days 28 and 56. (biomedcentral.com)
  • for example, greater activation results in the progressive loss of Pax7 expression as they enter the proliferative stage. (wikipedia.org)
  • This age-related decline in skeletal muscle mass and strength generation, the primary function of skeletal muscle mass, is known as sarcopenia ( 2 , 3 ). (frontiersin.org)
  • In cultured primary fibroblasts and cancer cells, the chemotherapeutic drug doxorubicin causes mtDNA damage and release, which leads to cGAS STING dependent ISG activation. (regenerativemedicine.net)
  • Myosatellite cells are located between the basement membrane and the sarcolemma of muscle fibers, and can lie in grooves either parallel or transversely to the longitudinal axis of the fibre. (wikipedia.org)
  • Satellite cells are able to differentiate and fuse to augment existing muscle fibers and to form new fibers. (wikipedia.org)
  • On the other hand, activated satellite cells have an increased number of caveolae, cytoplasmic organelles, and decreased levels of heterochromatin. (wikipedia.org)
  • In addition, mtDNA stress in TFAM-deficient mouse melanoma cells produces tumours that are more resistant to doxorubicin in vivo. (regenerativemedicine.net)
  • Sarcopenia, the age-related loss of skeletal muscle mass and function, is becoming more prevalent as the lifespan continues to increase in most populations. (frontiersin.org)
  • The term sarcopenia was first proposed in 1989 by Irwin Rosenberg to describe a multifactorial syndrome that occurs with age and results in loss of skeletal muscle mass and function ( 3 , 4 ). (frontiersin.org)
  • The delayed growth of LBW piglets is mainly due to a slower development of skeletal muscle as the myogenic activity is usually impaired in these animals during the fetal and early postnatal period 3 , 4 . (nature.com)
  • Research on regenerative medicine using basic fibroblast growth factor (bFGF) has recently advanced in the field of laryngology. (biomedcentral.com)
  • Studies rely almost exclusively on Flow cytometry and fluorescence activated cell sorting (FACS) analysis, which gives no information about cell lineage or behaviour. (wikipedia.org)
  • In healthy young adults, the skeletal muscle mass comprises approximately 60% of total body mass. (frontiersin.org)
  • HGF was cloned as a growth factor for hepatocytes ( 1 , 2 ), is identical to scatter factor (SF) and was originally discovered as a fibroblast-derived cell motility factor for epithelial cells ( 3 ). (spandidos-publications.com)
  • Thousands of copies of the circular mtDNA are present in most cell types that are packaged by TFAM into higher-order structures called nucleoids1. (regenerativemedicine.net)