Duchenne muscular dystrophy

Eppie M Yiu1,2,3,4, Andrew J Kornberg1,3,4

  • 1Neurology Department, Royal Children's Hospital Melbourne, Melbourne, Victoria, Australia.

Insights

Duchenne muscular dystrophy (DMD) is an X-linked disorder causing early childhood muscle weakness. Management with corticosteroids and supportive care improves quality of life and life expectancy for affected boys.

Area of Science:

  • Genetics and Molecular Biology
  • Neurology
  • Pediatrics

Background:

  • Duchenne muscular dystrophy (DMD) is a severe X-linked genetic disorder affecting approximately 1 in 5000 boys.
  • Characterized by progressive proximal muscle weakness, DMD leads to loss of ambulation by adolescence and premature death from cardiorespiratory failure.

Purpose of the Study:

  • To review the clinical features, diagnostic investigations, and current management strategies for Duchenne muscular dystrophy.
  • To highlight recent advancements in novel therapeutic approaches for DMD.

Main Methods:

  • Literature review of clinical features, epidemiology, and treatment outcomes for Duchenne muscular dystrophy.
  • Synthesis of information on standard care, including corticosteroids and respiratory support.
  • Overview of emerging novel therapies and their potential impact.

Main Results:

  • Corticosteroid therapy, non-invasive ventilation, and proactive management of complications significantly improve ambulation, function, and quality of life.
  • Current management strategies have extended the life expectancy of individuals with DMD.
  • Novel therapies show promise in addressing the underlying pathology of DMD.

Conclusions:

  • Early diagnosis and comprehensive management are crucial for optimizing outcomes in Duchenne muscular dystrophy.
  • Multidisciplinary care, including medical and supportive interventions, enhances functional abilities and longevity.
  • Ongoing research into novel therapies offers hope for more effective treatments for DMD.

Related Concept Videos

Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
2.6K
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
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...
2.4K
Sex-linked Disorders01:43

Sex-linked Disorders

Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
112.9K
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
801
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
805
Cross-bridge Cycle01:26

Cross-bridge Cycle

As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.
125.7K