| 
      
        | Transgene | Vector | Transfected Tissue/Cell | Animal | Reference |  
        | NT-3 | HSV | Subcutaneous | Rat | [19] |  
        | GDNF | Adenovirus | Laryngeal nerve | Rat | [20] |  
        | VEGF | Plasmid | Muscle | Mouse | [21] |  
        | FGF-2 | Plasmid | Scwann    Cells | Rat | [22] |  
        | VEGF | Plasmid | Muscle/Nerve | Rat | [23] |  
        | VEGF | Plasmid | Muscle | Rat | [24] |  
        | HGF | Adenovirus | Muscle | Rat | [25] |  
        | NGF+GDNF | Lentivirus | Nerve | Rat | [26] |  
        | VEGF | Plasmid | Bone Marrow | Rat | [27] |  
        | FGF-2 | Plasmid | Scwann    Cells | Rat | [28] |  
        | VEGF | Plasmid | Muscle | Mouse | [15] |  
        | BDNF | Adenovirus | Nerve | Rat | [29] |  
        | NGF | Lentivirus | Schwann    Cells | Rat | [30] |  
        | GDNF | Lentivirus/Plasmid | Schwann    Cells | Rat | [31] |  
        | VEGF | AAV | Muscle | Rat | [32] |  
        | VEGF+G-CSF | Plasmid | Muscle | Mouse | [17] |  
        | CDNF | Lentivirus | Nerve | Rat | [33] |  |