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- W2012044315 abstract "Cells rely heavily on cues from their extracellular environment and other cells to coordinate normal physiological processes, and the exchange of molecules via gap junctions has been suggested as an important avenue for cell-cell communication. Gap junctions are found in virtually all mammalian tissues with the notable exception of adult skeletal muscle. However, since functional gap junctions have been detected during the early stages of muscle development, gap junctional intercellular communication (GJIC) may play an important role in myogenesis. In this study, GJIC in normal L6 myoblasts was inhibited using the known blockers 1-octanal and β-glycyrrhetinic acid (β-GA). Under differentiation promoting conditions, L6 cells fused to form multinucleated myotubes, but when treated with either octanol or β-GA, no fusion was observed. The expression of two muscle regulatory factors (MRFs), myogenin and MRF4, was examined in both the blocked and control cells. As expected, the activation of both the myogenin and MRF4 genes coincided with the onset of differentiation in the control L6 cells. Neither of these genes were turned on in the blocked cells, even when grown under low serum conditions. This inhibition of differentiation by octanol and β-GA was reversible, since the activation of both MRF genes as well as myoblast fusion were observed when the blocking medium was replaced with normal differentiating medium. These results suggest that intercellular communication via gap junctions plays an important role in skeletal muscle development and perhaps in the cell signaling events that trigger the activation of muscle-specific MRF genes. Dev. Genet. 20:133–144. 1997. © 1997 Wiley-Liss, Inc." @default.
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- W2012044315 date "1997-01-01" @default.
- W2012044315 modified "2023-09-29" @default.
- W2012044315 title "Blocking gap junctional intercellular communication in myoblasts inhibits myogenin and MRF4 expression" @default.
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- W2012044315 doi "https://doi.org/10.1002/(sici)1520-6408(1997)20:2<133::aid-dvg6>3.0.co;2-8" @default.
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