Trial of Cell Based Therapy for DMD

Who May Qualify: - Duchenne muscular dystrophy, diagnosed by mutations in the DMD (dystrophin) gene and/or absence of immunohistochemical staining for dystrophin on muscle biopsy - Non-ambulatory - Intact extensor digitorum brevis (EDB) muscles bilaterally - Off investigational therapies for \> 30 days - Age 18 years of age or older at the time of consent - Have your organs (liver, kidneys, etc.) are working well enough based on blood tests confirmed by the following laboratory values obtained within 14 days prior to enrollment (28 days for cardiac and pulmonary function): - Participants with partners of childbearing potential must be willing to use at least two forms of effective birth control (one form must be a barrier method) while receiving the study product and for 3 months after stopping tacrolimus therapy. - Ability to follow commands sufficiently to perform voluntary aspects of outcome measures throughout the study period - Willing to consent to monitoring for 15 years, including an extension period, as required for all interventional studies involving the transplantation of cells that have been genetically modified - Voluntary written consent from the subject or parent(s)/guardian(s) and assent from participant prior to the performance of any research related activity. Who Should NOT Join This Trial: - Presence of HLA antibodies directed toward HLA antigens on MyoPAXon - Active treatment with another investigational therapy - Known allergy to MyoPAXon components Always talk to your doctor about whether this trial is right for you.