[Association between dystrophin and neuronal nitric oxide synthase in muscles of progressive muscular dystrophy]
Related Experiment Video
Updated: Oct 1, 2026

Measuring Neuromuscular Junction Functionality
Published on: August 6, 2017
1Department of Neuromuscular Disorders, General Hospital of Chinese People's Liberation Army, Beijing 100853, China.
Objective:
To study the association between dystrophin and neuronal nitric oxide synthase in muscles of progressive muscular dystrophy patients and the role of deficiency of nNOS in pathogenesis of muscular dystrophy.
Methods:
NADPH diaphorase enzyme histochemistry and anti-nNOS, anti-dystrophin, and anti-alpha, beta, gamma, delta-sarcoglycan antibody immunohistochemistry were used to analyze the muscle specimens from progressive muscular dystrophiy patients.
Results:
Both nNOS and dystrophin were absent in the sarcolemma region of Duchenne muscular dystrophy (DMD) patients. Dystrophin was reduced, and nNOS was absent or reduced in the sarcolemma region of Becker muscular dystrophy (BMD) patients. Both nNOS and dystrophin were expressed normally in the sarcolemma region of limb girdle muscular dystrophy (LGMD) patients.
Conclusion:
Deficiency of nNOS is associated with deficiency of dystrophin in the sarcolemma. Dystrophin may have a novel role in localizing nNOS to sarcolemma and regulating the expression of nNOS. Aberrant regulation of nNOS may contribute to degeneration of muscle fibers in DMD.
Related Concept Videos
Satellite Stem Cells and Muscular Dystrophy
Nitric Oxide Signaling Pathway
Alterations in Muscle Tone lll
Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin
The binding of dantrolene to the RYR1...
Disorders of the Skeletal Muscle
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Neuromuscular Junction And Blockade

