| Stem    cell | Origin | Characteristics | Preclinical/clinical    studies | 
      
        | ES cells | Inner cell mass of    the blastocysts | pluripotent    stem cells
          biological and    ethical problems
          teratoma    formation
          graft    versus-host disease | on mdx mice [30] | 
      
        | iPS cells | Reprogrammed mouse or    human somatic cells | pluripotent    stem cells
          no ethical    problems
          autologous    transplantation possible
          teratoma    formation | on mdx    mice,alphaSG-null and 
          alphaSG-null/Scid/bg [67,73,74] | 
      
        | Amniotic fluid stem    cells | Amniotic fluid | multipotent stem    cells
          no ethical    problems
          easy to    isolate and expand in culture | dystrophic mice [44-47] | 
      
        | Muscle -SP Cells | Muscle tissue | multipotent    cells
          high proliferation | Scid/bg immunodeficient mice 
          [48,57,58] | 
      
        | Satellite cells | Muscle fibres, under    the basal lamina | high    self-renewal
          high capacity    to generate skeletal muscle
          limited    engraftment and migration | Nude mice, pigs,    trial on humans 
          [51-54]. | 
      
        | Mesoangioblast cells    (MABs) | Muscle blood vessels,    pericyte | high    proliferation in    vitro no tumor    transformation
          able to pass    the endothelial layer | alphaSG-null,    mdx/scid mice, 
          GRMD dogs [59-61]; phase I/II 
          clinical trial    ongoing. | 
      
        | Bone marrow stromal    cells (BMSCs) | Bone marrow and also from    different tissues (adipose, tendon, dental pulp, placenta) | multipotent stem    cells
          easy to    isolate and expand in culture
          immunomodulatory    properties
          anti-inflammatory    properties
          low    engraftment | mdx mice [56-58]
          tissue engineering    applications 
          (biomaterials,    bioreactors, bone 
          implants) | 
      
        | Adipose-derived stem    cells (ASCs) | Adipose tissue | very easy to    isolate and 
          multipotent    cells
          high    proliferation in vitro
          immunosuppressive    properties | mdx mice, small-scale    studies on 
          tissue engineering, as    BMSCs (bone 
          implants,    biomaterials) 
          [38,39,71] |