Biologic Intervention in Muscle Healing and Regeneration

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Abstract
Muscle injuries are a challenging problem in traumatology and the most frequently occurring injuries in sports medicine. Even though muscles retain their ability to regenerate after injury, the healing process of muscles after such injuries has been found to be slow and often leads to an incomplete muscle recovery. In an attempt to develop approaches to improve muscle healing after injury, the authors have developed reproducible injury models for muscle contusion, strain, and laceration. The authors show that muscle regeneration occurs after those injuries, but the development of scar tissue greatly limits the natural healing process. It is likely that an enhancement of muscle growth and regeneration can be used to improve muscle healing after injuries. The authors have then identified growth factors that enhance myoblast proliferation and differentiation in vitro and muscle regeneration in the injured muscles, which improves muscle healing after injuries. Furthermore, different gene transfer systems, including cell and gene therapy, have been found successful in delivering genes into injured muscles and may open new opportunities to deliver growth factors and improve muscle healing after lacerations, contusions, and strains.

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