New method to grow and transplant muscle stem cells holds promise for treatment of muscular dystrophy

To have enough cells for transplantation, they must be grown in vitro and prevented from differentiating before transplantation. Several growth factors, cytokines, and chemicals have been used in muscle stem cell cultures, but the optimal culture conditions required to maintain the undifferentiated state, inhibit differentiation, and enhance eventual transplantation efficiency have not yet been established.

LIF is thought to be involved in muscle regeneration. The investigators found that when LIF-treated muscle stem cells were transplanted to skeletal muscle, they formed two to three times more muscle fibers as control cells did.

"To the best of our knowledge, this study provides the first report of the effect of LIF on the transplantation efficiency of primary satellite cells," explained Shin'ichi Takeda, MD, PhD, of the Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Japan. "This research enables us to get one step closer to the optimal culture conditions for muscle stem cells."

Dr. Takeda added, "However, precise mechanisms of LIF for the enhancement of transplantation efficiency remain unknown. Investigations aimed at determining the downstream targets of LIF would help to clarify the functional importance of LIF in muscle regeneration, and further its potential application in cell transplantation therapy."