Purpose&Contents
The transplantation technologies are required in order to treat myopathical diseases using myogenically differentiated stem cells in vivo. To be more concrete, 1) instead of using the conventionally used myogenic differentiation m...
Purpose&Contents
The transplantation technologies are required in order to treat myopathical diseases using myogenically differentiated stem cells in vivo. To be more concrete, 1) instead of using the conventionally used myogenic differentiation method based on biochemical signals, we have combined biochemical treatments with electrical (electric field) and mechanical (cyclic strain) stimulation to up-regulate the differentiation ratio, 2) and we have also evaluated the muscular regeneration efficiency and toxicity of the differentiated cells in vivo, to certify our myogenically differentiated cells as a proper cell therapeutic agent.
Results
- Maximization of the differentiation ability of human umbilical cord blood derived mesenchymal stem cell into skeletal muscular cells using electrical, mechanical and biochemical signals ex vivo: using all 3 biochemical, mechanical and electrical stimuli, the expression of skeletal muscular differentiating markers increased by 10 times (especially the expression of myogenin increased by 8 times) compared to using only biochemical stimulation.
- Study of the musculoskeletal differentiation stimulating mechanism: It is proved, that mechanical stimulus increases the expression of Grp78 and RhoA, while electrical stimulus increases the expression of Hsp27 and IGF-1.
- The efficiency evaluation of the transplanted musculoskeletal cells in skeletal muscle- injured animal model: By transplanting the skeletal muscle cells, which are induced from the human umbilical cord blood derived mesenchymal stem cell, the regenerated area of muscular fiber increased by approximately 250%, compared to the untreated group and only biochemically stimulated group.
- It is proved that the skeletal muscle cells differentiated from human umbilical cord blood derived mesenchymal stem cell have no cell toxicity, by subcutaneously transplanting the cells into the nude mouse.
Expected Contribution
Our muscle cell sheet could not only treat sarcopenia, but also prevent the secondary diseases occurred from sarcopenia (diabetes, obesity, and cardiovascular diseases). It is expected to improve the quality of life and reduce the medical expense of the senior citizens. In addition, our system could have the potential to be further applied to treat several other muscular diseases, such as muscular dystrophy, muscular atrophy, myositis, polymyositis, and fibrosis.