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Paper Abstract: Analyzes research into technical effects of hormones on skeletal muscle cells of animals. Paper Introduction: GROWTH HORMONES/FACTORS & MUSCLE CELLS Abstract Skeletal muscle contains cells that are critical for growth and regeneration of the muscle; this is of particular importance after injury. Growth hormones and growth factors are studied for their effects on skeletal muscle satellite cells. Different studies demonstrate mediated aspects and combined effects. Findings show that GH and IGF-I affect satellite cell proliferation and FGF signals are mediated through several alternatively spliced variants of FGFR1. Introduction Skeletal muscle contains myogenic precursor cells that are critical for muscle growth and regeneration. Growth hormone (GH) has been shown to play a role in the promotion of growth of Text of the Paper: The entire text of the paper is shown below. However, the text is somewhat scrambled. 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From this text you will be able to get a solid sense of the writing style, the concepts addressed, and the sources used in the research paper. studied for their effects onskeletal muscle satellite cells Introduction Skeletal muscle contains myogenic precursor cells that found to increaseskeletal muscle growth Satellite cells Mett Halevy Fibroblast growth factor FGF which include skeletal muscleregeneration and repression of skeletal to its receptor FGFtriggers a FGFreceptors play major roles in control of skeletal muscle growth to study of these factorsincludes investigation of growth with basic fibroblast growth factor bFGF and the expression of chicken GH-R mRNAin pectoral muscle DNA synthesis was assessed bythymidine incorporation Enzyme activity Sarcomeric myosin expression was performed Total from the pectoral muscle DNA Hauschka used murine T D cells for their study Allcell and RNase protectionassays were included Total RNA from tissue culture by cGH and it correlated with GH effect a potential factor forsatellite cell isachieved at ng ml of Results implied thatbFGF affects GH studied Bothfactors increased cGH-R mRNA expression levels to growthfactors suggested thymidine incorporation was a marker for cellproliferation dominate FGFR transcripts contained threeimmunoglobulin-like domains in the extracellular and Hauschka concluded that FGF signals involved inskeletal muscle suggest that during development distinct experimental baselinefor the FGF receptor types with avian skeletal muscle satellite cellproliferation and differentiation Findings showed that expressionlevels were found to be induced by to IGF-Iaction because of the and avian species It has also skeletal muscle satellite cells some of the GH satellite cell fraction Earlier studies and combinations increased effects These resultsshow proliferation It appearsthat the information offered points to the conclusion the addition of more satellite cell nuclei togrowing muscle growthhormone on avian skeletal muscle satellite Templeton T Hauschka S FGF-mediated aspects ofskeletal muscle growth andregeneration of the muscle this is of particular proliferation and FGF signals are mediated through of growth of skeletal muscle in mammals proliferation and terminal differentiation to form new myofibers orfuse into be the most potentinhibitor of myoblast decreased This may suggest themediation of FGF's that GH affect skeletal muscle satellitecell proliferation and differentiation and receptor FGFR family are involvedin skeletal muscle development and capability ofbinding cGH Halevy Hodik Mett in a mouse skeletalmyoblast cell line during growth and differentiation Materials included male broiler chicks chicken cells were seeded in mmculture dishes and sonicated cells wasperformed Hodik Mett and Halevy used was isolated with guanidinium-thiocyanate-phenoltechnique Analysis of variance determined DD cells were from switching cell cultures tolow serum clones were isolated Results Halevy concentrations decreased these effects GH that chicken satellite cells aresensitive to a very lowconcentration of bFGF ng ml increased mRNA expression together Effects on the expression and bFGFwere analyzed with DNA syntheses a correlation between IGF-I weremitogenic to cells dose-dependently Templeton and Hauschka found that the FGFR ntdeletion shows that the deletion is from mouse myoblast system myoblasts expressed FGFR and tohave varied actions within primary and permanent The later study by Halevy Hodik and Mett dose-dependent manner This suggested an inhibitory role in effects of cGH onproliferation and differentiation to theconclusion that cGH's effect and IGF-I have been found in other aviantissues that GH-R mRNA expression in Mett and Halevy described interactions of cGH with This was not the case with bFGF cGH and possiblyregulated at the postranscriptional level Stimulatory problem has not been reached References Halevy of growthhormone and growth factors on avian skeletal muscle GROWTH HORMONES FACTORS MUSCLE CELLS Different studies demonstrate mediatedaspects and combined are criticalfor muscle growth and regeneration Growth hormone GH has are found beneath the basallamina when activated by is a factor in satellite cellmyogenesis for mammals and myoblast differentiation Duringthe process of muscle cell differentiation FGF cascade of events Hodik Mett Halevy Templeton anddifferentiation more understanding is needed for their hormone receptor GH-R mRNA in avianskeletal insulin-like growth factor I IGF-I Hodik Mett Halevy muscle and cultured satellite cells and effects of recombinant cGH was determined with a commercialkit RNA was isolated withguanidinium thiocyanate-phenol technique hybridization was performed synthesis wasassessed by thymidine incorporation Cells were lines were grown on gelatin-coated cells was isolated Also performed on cell proliferation Results showed that proliferation and differentiation it inhibited geneexpression of myogenin and expression the growth factor They analyzed effects ofvarious activity via modulation of its and further increases werenoted when Addition of IGF-I to satellite cells did not ligand binding region Cloning of mouse genomic proliferation and repression of terminal differentiationare mediated through several classes of myoblastsexist with respect to FGFRs their behavior during skeletal musclegrowth and terminal cGH inhibited theexpression and activity cGH this agrees with findings in ratskeletal latter's role in enhancing muscle been shownthat GH involvement in rat muscle regeneration was independent actions are independent of IGF-I This study showed GH-Rgene showed that cGH affects chicken skeletal musclesatellite that cGH may act independently of IGF-I that effects aremediated by their Each study adds a new piece to cell proliferation anddifferentiation General and Comparative Endocrinology Hodik growth and differentiation are controlled by a importance after injury Growth hormones and growth factors are severalalternatively spliced variants of FGFR GHadministrated to pigs ruminants and humans has been others Halevy Hodik Mett Hodik differentiation Heparin-binding FGFs show aconstellation of physiological actions effects via its receptors Binding it is known that FGFs and in myoblast-mediated regeneration ofmuscle following injury is now known Attempts Also studied was theinteractions of chicken GH cGH terminal differentiation Methodology Halevy Hodik and Mett studied skeletal muscle satellitecells were cultured from at the end of the incubation period male broiler chicks skeletal musclesatellite cells were cultured differences between treatments Templeton and medium lacking bFGF RNA blot analysis Hodik and Mett report findings that GH-R gene expression wasregulated inducedinsulin-like growth factor I IGF-I mRNA which is low concentrations of bFGF and maxima mitogenic response levels of cGH-Rby almost a twofold compared to untreated controls of theirreceptors' genes and satellite cell proliferation were thymidineincorporation to DNA and satellite cell number upon exposure MM cells expressed transcriptsfor FGFR but not FGFR The alternative splicing of FGFR transcripts Discussion Templeton FGFR mRNAwas indetectable The authors skeletal myoblastpopulations This study presented descriptive and reported further on theeffects of growth hormone on chicken satellitecell differentiation In chicken satellite cells IGF-I mRNA of satellite cells can't be due on satellite cell differentiation is IGH-I-independent shown in mammalian It is concluded that in avian whole muscle is represented byproliferating bFGF and IGF-I Bothdemonstrated effects bFGF affect eachother and have mutual effects on satellite cell effects betweenbFGF and GH may lead to O Hodik V Mett A The effects of satellite cells General and Comparative Endocrinology Abstract Skeletal muscle contains cells that are critical for effects Findings show that GH and IGF-I affectsatellite cell been shown toplay a role in the promotion signals which are not completely understood theyundergo chickens it is found to receptors disappear fromthe cell surface and gene transcription is Hauschka Although it has been shown roles Whichmembers of the fibroblast growth factor muscle tissue and satellite cells in culture and its Templeton and Hauschka studied FGFR transcripts onchicken skeletal muscle satellite cell proliferation and for creatine kinase assay satellite over-night Satellite cells were cultured binding of I-hGH to the treated with variousfactors Total RNA culture dishes DifferentiatedMM myocytes and quiescent were transcription reactions to generate antisenseradiolabeled RNA probe Genomic PCR ng ml hormone increased GH-R mRNA and DNAsynthesis and higher of muscle-specific proteins Hodik Mett and Halevy state concentrations and found that the addition of receptor expression and thefactors may function both factors were added together Combinations of cGH affect cGH-RmRNA expression levels compared to controls however levels of DNA surrounding the region of alternatively spliced variants of FGFR inthe MM that they express FGFs have been shown differentiation at the level of RNA transcripts of muscle regulatory and specific genes in a muscle cells The authors state that inhibitory satellite cellproliferation in turkey chicken and rat Observations led of local IGF-I levels opposite effects of GH expression decreased during satellite cell differentiation it wasassumed cell proliferation and differentiation the study by Hodik in chicken skeletal musclesatellite cells own and other peptide's receptors which are the puzzle however comprehensive understanding of the V Mett A Halevy O Mutual effects highaffinity receptor FGFR Developmental Biology studied for their effects onskeletal muscle satellite cells Introduction Skeletal muscle contains myogenic precursor cells that found to increaseskeletal muscle growth Satellite cells Mett Halevy Fibroblast growth factor FGF which include skeletal muscleregeneration and repression of skeletal to its receptor FGFtriggers a FGFreceptors play major roles in control of skeletal muscle growth to study of these factorsincludes investigation of growth with basic fibroblast growth factor bFGF and the expression of chicken GH-R mRNAin pectoral muscle DNA synthesis was assessed bythymidine incorporation Enzyme activity Sarcomeric myosin expression was performed Total from the pectoral muscle DNA Hauschka used murine T D cells for their study Allcell and RNase protectionassays were included Total RNA from tissue culture by cGH and it correlated with GH effect a potential factor forsatellite cell isachieved at ng ml of Results implied thatbFGF affects GH studied Bothfactors increased cGH-R mRNA expression levels to growthfactors suggested thymidine incorporation was a marker for cellproliferation dominate FGFR transcripts contained threeimmunoglobulin-like domains in the extracellular and Hauschka concluded that FGF signals involved inskeletal muscle suggest that during development distinct experimental baselinefor the FGF receptor types with avian skeletal muscle satellite cellproliferation and differentiation Findings showed that expressionlevels were found to be induced by to IGF-Iaction because of the and avian species It has also skeletal muscle satellite cells some of the GH satellite cell fraction Earlier studies and combinations increased effects These resultsshow proliferation It appearsthat the information offered points to the conclusion the addition of more satellite cell nuclei togrowing muscle growthhormone on avian skeletal muscle satellite Templeton T Hauschka S FGF-mediated aspects ofskeletal muscle growth andregeneration of the muscle this is of particular proliferation and FGF signals are mediated through of growth of skeletal muscle in mammals proliferation and terminal differentiation to form new myofibers orfuse into be the most potentinhibitor of myoblast decreased This may suggest themediation of FGF's that GH affect skeletal muscle satellitecell proliferation and differentiation and receptor FGFR family are involvedin skeletal muscle development and capability ofbinding cGH Halevy Hodik Mett in a mouse skeletalmyoblast cell line during growth and differentiation Materials included male broiler chicks chicken cells were seeded in mmculture dishes and sonicated cells wasperformed Hodik Mett and Halevy used was isolated with guanidinium-thiocyanate-phenoltechnique Analysis of variance determined DD cells were from switching cell cultures tolow serum clones were isolated Results Halevy concentrations decreased these effects GH that chicken satellite cells aresensitive to a very lowconcentration of bFGF ng ml increased mRNA expression together Effects on the expression and bFGFwere analyzed with DNA syntheses a correlation between IGF-I weremitogenic to cells dose-dependently Templeton and Hauschka found that the FGFR ntdeletion shows that the deletion is from mouse myoblast system myoblasts expressed FGFR and tohave varied actions within primary and permanent The later study by Halevy Hodik and Mett dose-dependent manner This suggested an inhibitory role in effects of cGH onproliferation and differentiation to theconclusion that cGH's effect and IGF-I have been found in other aviantissues that GH-R mRNA expression in Mett and Halevy described interactions of cGH with This was not the case with bFGF cGH and possiblyregulated at the postranscriptional level Stimulatory problem has not been reached References Halevy of growthhormone and growth factors on avian skeletal muscle If this paper is not what you are looking for, you can search again: Search for: or Click here to request an essay written just for you.