Inducible Expression of Neurotrophic Factors by Mesenchymal Progenitor Cells Derived from Traumatically Injured Human Muscle

• Published in: Molecular biotechnology 2012-06, Vol.51 (2), p.128-136
• Main Authors: Bulken-Hoover, Jamie D, Jackson, Wesley M, Ji, Youngmi, Volger, Jared A, Tuan, Rocky S, Nesti, Leon J
• Format: Article
• Language: English
• Subjects: Biochemistry; Biological and medical sciences; Biological Techniques; Biotechnology; Cell Biology; Cell Proliferation - drug effects; Cell surface; Cells, Cultured; Chemistry; Chemistry and Materials Science; Culture Media; Fundamental and applied biological sciences. Psychology; Gene expression; Gene Expression Regulation - drug effects; genes; Human Genetics; Humans; Immunohistochemistry; Injuries; Mesenchymal Stromal Cells - cytology; Mesenchymal Stromal Cells - metabolism; Mesenchyme; muscle tissues; Muscle, Skeletal - cytology; Muscle, Skeletal - injuries; Muscles; Nerve Growth Factors - genetics; Nerve Growth Factors - metabolism; Nerve Regeneration; nerve tissue; Neurology; Neurotrophic factors; neurotrophins; Peripheral nerves; Protein Science; Regeneration; Reinnervation; Stem cells; Tissue Engineering; tissue repair; Tissues; Trauma; Tretinoin - pharmacology
• ISSN: 1073-6085; 1559-0305
• DOI: 10.1007/s12033-011-9445-z

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.