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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...
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...
Alterations in Muscle Tone lll01:11

Alterations in Muscle Tone lll

Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...
Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...

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Related Experiment Video

Updated: Jul 17, 2026

Single Myofiber Isolation and Culture from a Murine Model of Emery-Dreifuss Muscular Dystrophy in Early Post-Natal Development
08:07

Single Myofiber Isolation and Culture from a Murine Model of Emery-Dreifuss Muscular Dystrophy in Early Post-Natal Development

Published on: July 1, 2020

Emery-Dreifuss muscular dystrophy.

Antoine Muchir1, Howard J Worman

  • 1Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.

Current Neurology and Neuroscience Reports
|January 16, 2007
PubMed
Summary

Emery-Dreifuss muscular dystrophy (EDMD) involves mutations in nuclear envelope proteins. Research explores how these genetic defects cause muscle abnormalities, impacting nuclear integrity and gene expression.

Area of Science:

  • Genetics
  • Cell Biology
  • Molecular Medicine

Background:

  • Emery-Dreifuss muscular dystrophy (EDMD) presents with X-linked or autosomal inheritance patterns.
  • X-linked EDMD stems from mutations in the EMD gene, encoding nuclear envelope protein emerin.
  • Autosomal EDMD is linked to mutations in the LMNA gene, encoding A-type nuclear lamins.

Observation:

  • While causative mutations and mouse models exist, the precise mechanisms of EDMD pathogenesis remain unclear.
  • The study investigates how nuclear envelope protein defects lead to striated muscle abnormalities.
  • Hypotheses focus on nuclear structural integrity, mechanical stress susceptibility, and altered gene expression.

Findings:

  • Mutations in emerin (EMD) or A-type lamins (LMNA) disrupt nuclear envelope structure.

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Last Updated: Jul 17, 2026

Single Myofiber Isolation and Culture from a Murine Model of Emery-Dreifuss Muscular Dystrophy in Early Post-Natal Development
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Single Myofiber Isolation and Culture from a Murine Model of Emery-Dreifuss Muscular Dystrophy in Early Post-Natal Development

Published on: July 1, 2020

Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
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Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells

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Isometric and Eccentric Force Generation Assessment of Skeletal Muscles Isolated from Murine Models of Muscular Dystrophies
14:10

Isometric and Eccentric Force Generation Assessment of Skeletal Muscles Isolated from Murine Models of Muscular Dystrophies

Published on: January 31, 2013

  • These disruptions may compromise nuclear structural integrity and increase susceptibility to mechanical damage.
  • Altered nuclear envelope function can impact gene expression, cell proliferation, and differentiation.

    • Implications:

    • Understanding these pathogenic processes is crucial for developing targeted therapies for EDMD.
    • This research could elucidate the role of nuclear envelope proteins in muscle development and disease.
    • Further investigation may reveal broader implications for other nuclear envelopathies affecting muscle tissue.