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- W2803856902 abstract "Abstract The molecular mechanisms involved in myogenic differentiation are relatively well-known. Myogenic differentiation is regulated by the sequential activation of the basic helix-loop-helix myogenic regulatory transcription factors (MRFs), and biomechanical signals play an important role in the regulation of myogenesis. In this study, we sought to determine whether simulated microgravity culture using Gravite ® may affect myoblast differentiation and expression of MRF genes. Although rat myoblasts, L6 cells were differentiated to myotubes in an incubation period-dependent manner, myogenesis of L6 cells was significantly attenuated under simulated microgravity (10 -3 G) conditions. Real-time Reverse transcription polymerase chain reaction (RT-PCR) showed that expressions of Myog , Myf6 , Mef2c , Des , and Ckm under 1 G conditions increase in an incubation period-dependent manner, and that Myod1 expression was specifically observed to increase transiently in the early phase. However, expressions of Myod1 and Myog were significantly inhibited under simulated microgravity conditions. To clarify the molecular mechanisms, L6 cells were treated with 5-AzaC, and further incubated with differentiation medium under 1 G or 10 −3 G conditions. The results showed differences in expression levels of Myod1 , Myog , and, as well as those of myotube thickness between 1 G and 10 −3 G conditions, completely disappeared in this experimental condition. Modified HpaII tiny fragment enrichment by ligation-mediated PCR (HELP)-assay showed that kinetic changes of DNA methylation status were attenuated in simulated microgravity conditions. These results indicate that microgravity regulates myogenesis and Myod1 expression by controlling DNA methylation." @default.
- W2803856902 created "2018-06-01" @default.
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- W2803856902 date "2018-05-23" @default.
- W2803856902 modified "2023-10-18" @default.
- W2803856902 title "Simulated microgravity attenuates myogenic differentiation via epigenetic regulations" @default.
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- W2803856902 doi "https://doi.org/10.1038/s41526-018-0045-0" @default.
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