title: Androgen receptor enhances myogenin expression and accelerates differentiation.
abstract: Animal and clinical studies indicated that the androgen-AR signaling pathway is required for appropriate development of sexually dimorphic skeletal muscles and increases lean muscle mass, muscle strength, and muscle protein synthesis. However, the detailed mechanisms by which the androgen-AR signaling pathway regulates skeletal muscle development need further study at the molecular level. C2C12 myoblast cells stably transfected with the Flag-tagged AR were used to analyze the role of androgen-AR signaling pathway in skeletal muscle development. The results indicate that the androgen-AR signaling pathway may suppress skeletal myoblast cell growth and accelerate myoblast cell differentiation via enhanced myogenin expression. This is a first report showing the role of androgen-AR signaling pathway in regulation of myoblast cell growth and myogenic regulatory factors.
authors.affiliation: Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, USA. dongkun_lee@urmc.rochester.edu
authors.forename: Dong Kun
authors.initials: DK
authors.lastname: Lee
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000502:physiology; D002455:Cell Division / Q000502:physiology; D002460:Cell Line; D005455:Fluorescent Antibody Technique; D051379:Mice; D018482:Muscle, Skeletal / Q000166:cytology / Q000378:metabolism*; D017570:MyoD Protein / Q000096:biosynthesis; D018008:Myogenin / Q000096:biosynthesis*; D011944:Receptors, Androgen / Q000235:genetics / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology; D014162:Transfection
chemical_list: D017570:MyoD Protein; C503801:Myog protein, mouse; D018008:Myogenin; D011944:Receptors, Androgen; D011993:Recombinant Fusion Proteins