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For in vitro tissue engineering of skeletal muscle, alignment and fusion of the cultured skeletal muscle cells are required. Although the successful alignment of skeletal muscle cells cultured in collagen gel has been reported using a mechanical force, other means of aligning cultured skeletal muscle cells have not been described. However, skeletal muscle cells cultured in a two-dimensional dish have been reported to align in a uniform direction when electrically stimulated. The purpose of this study is to determine if skeletal muscle cells cultured three-dimensionally in collagen gels can be aligned by an electrical load. By adding direct current to cells of the C2C12 skeletal muscle cell line cultured in collagen gel, it was possible to align C2C12 cells in a similar direction. However, the ratio of alignment was better when mechanical force was used as the means of alignment. Thus for tissue engineering of skeletal muscle cells, electrical stimulation may be useful as a supplementary method.

Alignment of Skeletal Muscle Cells Cultured in Collagen Gel by Mechanical and Electrical Stimulation