title: Inducible expression of neurotrophic factors by mesenchymal progenitor cells derived from traumatically injured human muscle.
abstract: Peripheral nerve damage frequently accompanies musculoskeletal trauma and repair of these nerves could be enhanced by the targeted application of neurotrophic factors (NTFs), which are typically expressed by endogenous cells that support nerve regeneration. Injured muscle tissues express NTFs to promote reinnervation as the tissue regenerates, but the source of these factors from within the muscles is not fully understood. We have previously identified a population of mesenchymal progenitor cells (MPCs) in traumatized muscle tissue with properties that support tissue regeneration, and our hypothesis was that MPCs also secrete the NTFs that are associated with muscle tissue reinnervation. We determined that MPCs express genes associated with neurogenic function and measured the protein-level expression of specific NTFs with known functions to support nerve regeneration. We also demonstrated the effectiveness of a neurotrophic induction protocol to enhance the expression of the NTFs, which suggests that the expression of these factors may be modulated by the cellular environment. Finally, neurotrophic induction affected the expression of cell surface markers and proliferation rate of the MPCs. Our findings indicate that traumatized muscle-derived MPCs may be useful as a therapeutic cell type to enhance peripheral nerve regeneration following musculoskeletal injury.
authors: Cartilage Biology and Orthopaedic Branch, Department of Health and Human Services, National Institute of Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, MD MSC 8022, USA.
authors: Jamie D
authors: JD
authors: Bulken-Hoover
authors: Wesley M
authors: WM
authors: Jackson
authors: Youngmi
authors: Y
authors: Ji
authors: Jared A
authors: JA
authors: Volger
authors: Rocky S
authors: RS
authors: Tuan
authors: Leon J
authors: LJ
authors: Nesti
mesh_terms: D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D003470:Culture Media; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D007150:Immunohistochemistry; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism*; D018482:Muscle, Skeletal / Q000166:cytology* / Q000293:injuries*; D009414:Nerve Growth Factors / Q000235:genetics / Q000378:metabolism*; D009416:Nerve Regeneration; D023822:Tissue Engineering; D014212:Tretinoin / Q000494:pharmacology
chemical_list: D003470:Culture Media; D009414:Nerve Growth Factors; D014212:Tretinoin