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    Wyświetlanie 1-6 z 6
    Tytuł:
    Interleukin-1beta stimulates early myogenesis of mouse C2C12 myoblasts: the impact on myogenic regulatory factors, extracellular matrix components, IGF binding proteins and protein kinases
    Autorzy:
    Grabiec, K.
    Tokarska, J.
    Milewska, M.
    Blaszczyk, M.
    Gajewska, M.
    Grzelkowska-Kowalczyk, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/30341.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The purpose of the study was to examine the mechanisms important for early myogenesis in mouse C2C12 myogenic cells exposed to interleukin-1β. Cyclin A and cyclin B1 were increased by interleukin-1β (1 ng/ml), but the level of cyclin D1 and total DNA content was unaffected. Fusion index and the rate of protein synthesis was increased in the presence of IL-1β, but these effects were limited to 3-day-treatment. IL-1β increased the level of MyoD, myogenin and MHC on the 3rd day of differentiation, without altering the content of the active form of myostatin, as well as it augmented the level of fibronectin, integrin β1 and full length 100 kDa form of ADAM12. IL-1β caused a decrease in IGFBP-4 and IGFBP-6 levels and a marked increase in IGFBP-5. The phosphorylation of PKB and ERK1/2 and the cellular content of p38 were elevated by IL-1β. We conclude that the myogenic effect of IL-1β was limited to the onset of myoblast fusion and was associated with: i) increase in the level of myogenic transcription factors i.e. MyoD and myogenin expression, ii) modification of extracellular matrix assembly and signaling, manifested by an increase in fibronectin, integrin-β1 and ADAM12 content, iii) drop in IGFBP-4 and IGFBP-6, and an increase in IGFBP-5, that could alter the local IGF-1 bioavailability, and iv) increase in phosphorylation of PKB and ERK1/2, and the expression of p38 kinase, leading to activation of intracellular pathways essential for myogenic differentiation.
    Źródło:
    Polish Journal of Veterinary Sciences; 2013, 16, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Miozyny niekonwencjonalne i ich rola w mięśniach poprzecznie prążkowanych i komórkach miogennych
    Unconventional myosins and their functions in striated muscles and myogenic cells
    Autorzy:
    Suszek, Małgorzata
    Nowak, Jolanta
    Rędowicz, Maria
    Powiązania:
    https://bibliotekanauki.pl/articles/1033935.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Przyrodników im. Kopernika
    Tematy:
    cardiac muscle
    myoblasts
    myosins
    myotubes
    skeletal muscle
    mioblasty
    miotuby
    miozyny
    mięsień sercowy
    mięsień szkieletowy
    Opis:
    Miozyny to oddziałujące z aktyną białka motoryczne, zaangażowane w skurcz mięśni, migrację komórek i transport wewnątrzkomórkowy. Występują one we wszystkich organizmach eukariotycznych, w tym w pierwotniakach i roślinach. Miozyny zbudowane są z jednego lub dwóch łańcuchów ciężkich oraz kilku łańcuchów lekkich (1-7 na łańcuch ciężki). Zidentyfikowano kilka tysięcy sekwencji łańcuchów ciężkich miozyn występujących w kilkuset gatunkach. W łańcuchach ciężkich miozyn wyróżniono główkę obejmującą domenę motoryczną (miejsce oddziaływania z aktyną i wiązania ATP) i szyjkę z motywami IQ (miejsce niekowalencyjnego wiązania się z łańcuchami lekkimi) oraz ogonek (zawierający domeny warunkujące specyficzne funkcje poszczególnych izoform miozyny). Na podstawie różnic w sekwencji aminokwasowej domeny motorycznej wyróżniono ponad trzydzieści rodzin w nadrodzinie miozyn, z czego 12, reprezentowanych przez 40 izoform, występuje u człowieka. Miozyny mięśniowe (tworzące rodzinę II) zwane są konwencjonalnymi, a pozostałe - niekonwencjonalnymi. Niniejszy artykuł opisuje nadrodzinę miozyn, a w szczególności budowę i funkcje tych miozyn niekonwencjonalnych, które są obecne w komórkach miogennych i mięśniach poprzecznie-prążkowanych.
    Myosins, actin-dependent molecular motors, are engaged in muscle contraction, cell migration and intracellular transport. They are present in all eukaryotic organisms including protists and plants. They are composed of one or two heavy chains, and a number of light chains (1-7 per a heavy chain). Several thousands of myosin heavy chains have been sequenced in hundreds of species. The heavy chain is composed of a motor domain (with actin and ATP binding sites), a neck with IQ motifs (where light chains bind to) and a tail (with domains determining specific functions of a given myosin). A myosin superfamily is divided into over 30 families based on differences in the motor domain primary sequence. Twelve families represented by 40 isoforms are expressed in humans. Well known muscle myosins forming a family II are termed as conventional while all others are termed as unconventional. The article describes the myosin superfamily with emphasis on structure and function of unconventional myosins present in myogenic cells and striated muscles.
    Źródło:
    Kosmos; 2018, 67, 1; 57-74
    0023-4249
    Pojawia się w:
    Kosmos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of satellite cells in skeletal muscle regeneration
    Rola komórek satelitarnych w regeneracji mięśnia szkieletowego
    Autorzy:
    Harasiuk, Dorota
    Górski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1942938.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie
    Tematy:
    satellite cells
    Myoblasts
    Myogenic Regulatory Factors
    self-renewal
    Cell Transplantation
    komórki satelitarne
    mioblasty
    mięśniowe czynniki transkrypcyjne
    samoodnowa
    przeszczepy komórkowe
    Opis:
    Skeletal muscles are composed of multinucleated fibers that cannot divide. They retain the ability to regenerate due to the presence of mononucleated cells, called satellite cells. Mitotically quiescent satellite cells are located between the sarcolemma and the basal lamina of the muscle fiber. They can be activated in response to muscle injury. Then they proliferate, differentiate and eventually fuse to damaged myofibers or fuse together to form new myofibers. A part of the activated cells escape differentiation and restore the pool of quiescent satellite cell under the basal lamina of the newly formed muscle fibers. A decline in the number and activity of satellite cells results in an impaired regeneration potential of aged muscle. However regeneration can be improved by modification of the microenvironment of the skeletal muscle. Satellite cells have been considered as a source for cell-based therapies in the treatment of diseases such as muscular dystrophies, heart failure, insufficient function of external urethral sphincter. They can be derived easily from skeletal muscle biopsies and cultured in vitro before cell transplantation. After injection to the host muscle they undergo a myogenic differentiation program. In the case of muscle dystrophy, clinical trials have demonstrated a lack of health improvement after transplantation. This was the result of the poor survival and limited migratory capacity of the injected cells. More promising results were obtained when satellite cells were transferred to the locally damaged muscles. This article demonstrates the role of satellite cells in skeletal muscle regeneration, and the possibilities of their use in cell-based therapies in the case of diseases where muscle fibers are impaired.
    Źródło:
    Medical Rehabilitation; 2009, 13(3); 25-32
    1427-9622
    1896-3250
    Pojawia się w:
    Medical Rehabilitation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The transcriptomic signature of myostatin inhibitory influence on the differentiation of mouse C2C12 myoblasts
    Autorzy:
    Wicik, Z.
    Sadkowski, T.
    Jank, M.
    Motyl, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/30247.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    GDF8 (myostatin) is a unique cytokine strongly affecting the skeletal muscle phenotype in human and animals. The aim of the present study was to elucidate the molecular mechanism of myostatin influence on the differentiation of mouse C2C12 myoblasts, using the global-transcriptome analysis with the DNA microarray technique. Treatment with exogenous GDF8 strongly affected the growth and development of C2C12 mouse myoblasts. This was manifested by the inhibition of proliferation and differentiation as well as the impairment of cell fusion. DNA microarray analysis revealed 778 genes regulated by GDF8 in differentiating myoblasts (436 down-regulated and 235 up-regulated). Ontological analysis revealed their involvement in 17 types of biological processes, 10 types of molecular functions and 68 different signalling pathways. The effect of GDF8 was mainly mediated by the disruption of the cell cycle, calcium and insulin signalling pathways and expression of cytoskeletal and muscle specific proteins. The identified key-genes that could play a role as GDF8 targets in differentiating myoblasts are: Mef2, Hgf, Ilb1, Itgb1, Edn1, Ppargc1a.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transcriptional pattern of TGF-beta1 inhibitory effect on mouse C2C12 myoblasts differentiation
    Autorzy:
    Wicik, Z.
    Sadkowski, T.
    Jank, M.
    Motyl, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/30377.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transforming growth factor-beta 1
    myogenesis
    microarray
    DNA microarray
    differentiation
    myoblast
    mouse
    mice
    muscle cell
    myosin heavy chain
    Opis:
    The aim of the present study was to define the effect of TGF-β1 on C2C12 myoblasts myogenesis. TGF-β1 together with its receptor is a negative auto-paracrine regulator of myogenesis, which influences the proliferation, differentiation, and functions of muscle cells. TGF-β1 exerts highly significant inhibitory effect on differentiation of C2C12 mouse myoblasts manifested by the impairment of cell fusion and very low expression of myosin heavy chain. The study of differentiating C2C12 mouse myoblasts treated with TGF-β1 revealed 502 genes (436 down-regulated and 66 up-regulated) with statistically different expression. TGF-β1-regulated genes were identified to be involved in 29 biological processes, 29 molecular functions groups and 59 pathways. The strongest inhibiting effect of TGF-β1 was observed in the cadherin and Wnt pathways. The key-genes that could play the role of TGF-β1 targets during myoblasts differentiation was identified such as: Max, Creb1, Ccna2, Bax, MdfI, Tef, Tubg1, Cxcl5, Rho, Calca and Lgals4.
    Źródło:
    Polish Journal of Veterinary Sciences; 2010, 13, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tumor necrosis factor - Alpha alters integrins and metalloprotease ADAM12 levels and signaling in differentiating myoblasts
    Autorzy:
    Grzelkowska-Kowalczyk, K.
    Tokarska, J.
    Grabiec, K.
    Gajewska, M.
    Milewska, M.
    Blaszczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31937.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The extracellular matrix (ECM) is important in the regulation of myogenesis. We hypothesized that tumor necrosis factor-α (TNF-α) modifies ECM during differentiation of mouse C2C12 myoblasts. Exogenous TNF-α (1 ng/ml) stimulated myoblast fusion on the 3rd day (by 160% vs control) but not on the 5th day of myogenesis. The level of integrin α5 was significantly augmented by TNF-α during 5 day-differentiation; however, integrin β1 was higher than control only on the 3rd day of cytokine treatment. Both the abundance of integrin α5 bound to actin and the level of integrin β1 complexed with integrin α5 increased in the presence of TNF-α, especially on the 3rd day of differentiation. Similarly, the stimulatory effects of TNF-α on integrin α3, metalloprotease ADAM12 and kinases related to integrins, FAK and ILK, were limited to the 3rd day of differentiation. We concluded that TNF-α-induced changes in ECM components in differentiating myogenic cells, i.e. i) increased expression of integrin α5, β1, α3, and metalloprotease ADAM12, ii) enhanced formation of α5β1 integrin receptors and interaction of integrin α5-cytoskeleton, and iii) increased expression of kinases associated with integrin signaling, FAK and ILK, were temporarily associated with the onset of myocyte fusion.
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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