Accession Number : ADA572210


Title :   Mesenchymal Stem Cell Therapy for Nerve Regeneration and Immunomodulation after Composite Tissue Allotransplantation


Descriptive Note : Annual rept. 20 Sep 2011-31 Jan 2012


Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD


Personal Author(s) : Lee, W P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a572210.pdf


Report Date : Feb 2012


Pagination or Media Count : 16


Abstract : Composite Tissue Allotransplantation (CTA) offers an alternative reconstructive strategy for complicated musculoskeletal injuries incurred during modern warfare where functional outcomes after multipe conventional reconstructions are suboptimal. Broader clinical application of CTA, however, continues to be hampered by requirement for long-term multi-drug immunosuppression to prevent graft rejection. Furthermore, unlike in solid organs, clinical success is dictated not only by graft acceptance, but also by functional outcome. Our study proposes a novel cell-based therapy utilizing mesenchymal stem cells (MSC) that can augment nerve regeneration while minimizing the need for immunosuppression. After transition from University of Pittsburgh to Johns Hopkins University, we optimized our isolation and culture protocol for MSCs. Immunophenotypic and functional characterization of cultured cells demonstrated potent immunomodulatory effects of MSCs in vitro. Preliminary functional outcome analysis using Catwalk showed convergent data with similar loss and return of function among groups. Similarly, compound muscle action potentials at early time points showed small non-significant increases in amplitude in experimental groups. In contrast, normalized gastrocnemius weights showed increased muscle weight in only the systemic injection group. Overall, we continue to monitor both functional and histological outcomes. Consistent with existing literature on nerve regeneration, we expect to observe more evident differences among groups with increased data over the longer term.


Descriptors :   *IMMUNOSUPPRESSION , *MUSCULOSKELETAL SYSTEM , *NERVES , *STEM CELLS , *TISSUES(BIOLOGY) , CELLS(BIOLOGY) , CLINICAL MEDICINE , CONNECTIVE TISSUE , CONSISTENCY , EMBRYOS , HISTOLOGY , IN VITRO ANALYSIS , INJECTION , MUSCLES , ORGANS(ANATOMY) , POTENCY , REGENERATION(PHYSIOLOGY) , REJECTION , SCIATIC NERVE , TRANSITIONS , TRANSPLANTATION , UNIVERSITIES , WOUNDS AND INJURIES


Subject Categories : Medicine and Medical Research
      Stress Physiology


Distribution Statement : APPROVED FOR PUBLIC RELEASE