Abstract
Human myoblasts were transplanted in nude mice. The efficacy of these transplantations was analyzed using a monoclonal antibody (NCLDys3) specific for human dystrophin. This antibody did not reveal any dystrophin in nude mice that did not receive a human myoblast transplantation. However, about 30 days after a human myoblast transplantation, dystrophin-positive muscle fibers were observed. They were not abundant, and were present either in small clusters or isolated. This technique follows the fate of myoblast transplantation in animals that already have dystrophin, and distinguishes between new dystrophin-positive fibers due to the transplantation and the revertant fibers in mdx mice. Moreover, this technique does not require any labelling of the myoblasts before transplantation. It can also be used to detect dystrophin produced following the fusion of myoblasts transfected with the human dystrophin gene.
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