title: Muscle satellite cells from GRMD dystrophic dogs are not phenotypically distinguishable from wild type satellite cells in ex vivo culture.
abstract: Duchenne muscular dystrophy is a neuromuscular degenerative disorder caused by the absence of dystrophin protein. It is characterized by progressive muscle weakness and cycles of degeneration/regeneration accompanying chronic muscle damage and repair. Canine models of muscular dystrophy, including the dystrophin-deficient golden retriever muscular dystrophy (GRMD), are the most promising animal models for evaluation of potential therapies, however canine-specific molecular tools are limited. In particular, few immune reagents for extracellular epitopes marking canine satellite cells (muscle stem cells) are available. We generated an antibody to the satellite cell marker syndecan-4 that identifies canine satellite cells. We then characterized isolated satellite cells from GRMD muscle and wildtype muscle by several in vitro metrics, and surprisingly found no significant differences between the two populations. We discuss whether accumulated adverse changes in the muscle environment rather than cell-intrinsic defects may be implicated in the eventual failure of satellite cell efficacy in vivo.
authors.affiliation: Division of Biological Sciences and Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA.
authors.forename: Zachary
authors.initials: Z
authors.lastname: Berg
authors.forename: Lucas R
authors.initials: LR
authors.lastname: Beffa
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Cook
authors.forename: D D W
authors.initials: DD
authors.lastname: Cornelison
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015153:Blotting, Western; D002454:Cell Differentiation / Q000502:physiology; D002465:Cell Movement / Q000502:physiology; D049109:Cell Proliferation; D003001:Cloning, Molecular; D004285:Dogs; D005434:Flow Cytometry; D007150:Immunohistochemistry; D008969:Molecular Sequence Data; D009137:Muscular Dystrophy, Animal / Q000473:pathology*; D032496:Satellite Cells, Skeletal Muscle / Q000473:pathology*; D053671:Syndecan-4 / Q000235:genetics / Q000276:immunology
chemical_list: D053671:Syndecan-4