Abstract
Quantitative ultrastructural studies of satellite cell populations, and nuclear chromatin analysis of satellite cell nuclei and true subsarcolemmal nuclei were carried out in normal and Duchenne muscular dystrophy (DMD) muscles. There was a remarkable increase in the number of satellite cells in muscles of patients with mild to moderate stages of DMD, as compared to preclinical or very early and probably advanced stages of DMD, and a significant increase in euchromatin content was found in the satellite cell nuclei in DMD. Since it is generally accepted that satellite cells participate actively in muscle fiber regeneration, this study suggests that muscle fiber regeneration is ineffective in DMD.
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