Using Stem Cells to Regenerate Injured Muscles
When muscles are injured, the body utilizes muscle stem cells to regenerate new muscle in the damaged area. But there are only a limited number of stem cells in any given muscle. If the injury is large and the number of stem cells is depleted, the body heals muscle with non-functional scar tissue instead. In this case, patients lose strength and maybe even the ability to walk. Within the past year, major breakthroughs in muscle stem cell research have allowed us to isolate muscle stem cells from a small biopsy and help them grow quickly in a laboratory setting. These cells can then be injected back into healing muscle to maintain muscle strength and function. For patients with lower extremity injuries, Indranil Sinha, MD, and his team can potentially take a small muscle biopsy from the shoulder, isolate and grow the muscle stem cells, and inject them back into the area that’s injured. The expectation is that this approach could help patients preserve strength, function, and their ability to walk without the aid of prosthetic devices.
Tendon regenerative medicine strategies aim to target endogenous stem or progenitor cells to improve repair outcomes or use isolated progenitor cells for tissue engineering approaches to create a better engineered tissue with optimal healing potential. Jenna Galloway, PhD, will apply single-cell RNA-sequencing technology to establish a pipeline for the isolation of tendon progenitors and to identify pathways that could be targeted for their activation. Successful completion of these goals would provide a framework for new, innovative therapies for tendon and ligament injuries.
This Stepping Strong Innovator Awardee also received the Stepping Strong Breakthrough Award to further this research project.