Duchenne muscular dystrophy is an X-linked disease of muscle caused by an absence of the protein dystrophin. Affected boys begin manifesting signs of disease early in life, cease walking at the beginning of the second decade, and usually die by age 20 years. Until treatment of the basic genetic defect is available, medical, surgical, and rehabilitative approaches can be used to maintain patient function and comfort. Corticosteroids, including prednisone and a related compound, deflazacort, have recently been shown to markedly delay the loss of muscle strength and function in boys with Duchenne muscular dystrophy. Surgical release of lower extremity contractures may benefit some patients. Approximately 90% of boys with Duchenne muscular dystrophy will develop severe scoliosis, which is not amenable to control by nonsurgical means such as bracing or adaptive seating. The most effective treatment for severe scoliosis is prevention by intervening with early spinal fusion utilizing segmental instrumentation as soon as curves are ascertained and before the onset of severe pulmonary or cardiac dysfunction.
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Department of Physiology, School of Medicine, University College Cork, Western Road, Cork, Ireland.
Duchenne muscular dystrophy (DMD), an X-linked neuromuscular disorder, characterised by progressive immobility, chronic inflammation and premature death, is caused by the loss of the mechano-transducing signalling molecule, dystrophin. In non-contracting cells, such as neurons, dystrophin is likely to have a functional role in synaptic plasticity, anchoring post-synaptic receptors. Dystrophin-expressing hippocampal neurons are key to cognitive functions such as emotions, learning and the consolidation of memories.
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Graduate Course in Medicine (Pathological Anatomy), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Muscular dystrophies (MD) are a group of hereditary diseases marked by progressive muscle loss, leading to weakness and degeneration of skeletal muscles. These conditions often result from structural defects in the Dystrophin-Glycoprotein Complex (DGC), as seen in Duchenne Muscular Dystrophy (DMD) and Becker Muscular Dystrophy (BMD). Since MDs currently have no cure, research has focused on identifying potential therapeutic targets to improve patients' quality of life.
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