title: Gene expression during the differentiation of myogenic cells of the L6 line.
abstract: The problem of the mechanistic relationship among the different phenotypic expressions in an established myogenic line was approached by blocking cell fusion at different developmental stages, by addition of cytochalasin B. The addition of the drug to cultures at the time when the first two myotubes appeared on the dish, blocked fusion, but did not affect DNA synthesis, expression of myosin, phosphorylase, phosphocreatine kinase, phosphorylase kinase or glycogen synthetase, nor the organization of the elements of the hexagonal lattice. It is concluded that cell fusion is not a prerequisite for the expression of the differentiated phenotype.
mesh_terms: D002454:Cell Differentiation / Q000187:drug effects; D002459:Cell Fusion; D002460:Cell Line; D003402:Creatine Kinase / Q000096:biosynthesis; D003571:Cytochalasin B / Q000494:pharmacology; D004261:DNA Replication / Q000187:drug effects; D005838:Genotype; D006006:Glycogen Synthase / Q000096:biosynthesis; D009132:Muscles / Q000378:metabolism* / Q000648:ultrastructure; D009218:Myosins / Q000096:biosynthesis; D010641:Phenotype; D010764:Phosphorylase Kinase / Q000096:biosynthesis; D006005:Phosphorylases / Q000096:biosynthesis; D014176:Protein Biosynthesis / Q000187:drug effects; D014158:Transcription, Genetic / Q000187:drug effects
chemical_list: D003571:Cytochalasin B; D006005:Phosphorylases; D006006:Glycogen Synthase; D010764:Phosphorylase Kinase; D003402:Creatine Kinase; D009218:Myosins