Christopher Labrecque

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Frog endplates were studied with the scanning electron microscope following the removal of the presynaptic terminal by collagenase and acid treatments. Endplates had 2-14 branches of primary cleft. The longest branches were parallel to the muscle fiber. Short branches oblique or perpendicular to the muscle fiber were also present near the central region of(More)
Neuromuscular junctions (NMJs) were identified by revealing the presence of cholinergic receptors (AChR) with alpha-bungarotoxin coupled to the fluorescent dye cascade blue in 9- and 60-day-old normal and heterozygote mdx mice. Dystrophin was detected by an immunoperoxidase technique. All the muscle fibers of the normal animals observed in cross sections(More)
Duchenne muscular dystrophy (DMD) is characterized by a lack of dystrophin expression. Dystrophin is a 420 Kd protein localized in the muscle sarcolemma that most likely provides stability to the muscle plasma membrane. Neuromuscular junctions (NMJs) were localized by revealing either the acetylcholine receptors (AChRs) with alpha-bungarotoxin coupled with(More)
The structure of the end-plate regions of normal and dystrophic 3-month-old mice were studied by scanning electron microscopy after the presynaptic terminals were removed by hydrochloric acid treatment. Quantitative analysis revealed that the end-plate area correlated positively with the muscle fiber diameter in both the normal and dystrophic animals.(More)
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