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CRISPR/Cas9 Technology in Restoring Dystrophin Expression in iPSC-Derived Muscle Progenitors
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Current concepts in dystrophinopathies.

Venkataraman Viswanathan1

  • 1Department of Pediatric Neurology, Kanchi Kamakoti CHILDS Trust and Apollo Children's Hospitals, 12 A, Nageswara Road, Nungambakkam, Chennai, 600034, Tamil Nadu, India, vishneuro@gmail.com.

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Dystrophinopathies are inherited muscle disorders causing progressive weakness. These conditions, including Duchenne/Becker muscular dystrophy, vary in severity and presentation based on genetic factors.

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Area of Science:

  • Genetics
  • Neurology
  • Molecular Biology

Background:

  • Dystrophinopathies are inherited muscle disorders.
  • Characterized by progressive skeletal muscle wasting and weakness due to muscle fiber degeneration.
  • Phenotypes associated with the Xp21 gene region have expanded since 1987.

Purpose of the Study:

  • To summarize the spectrum of dystrophinopathies.
  • To highlight the variability in disease presentation and inheritance patterns.
  • To underscore the expanding understanding of Xp21-related phenotypes.

Main Methods:

  • Literature review of dystrophinopathies.
  • Analysis of phenotypic variations.
  • Classification based on transmission, onset, and weakness patterns.

Main Results:

  • Dystrophinopathies present a wide range of phenotypes.
  • Mild phenotypes include muscle cramps with myoglobinuria and isolated quadriceps myopathy.
  • Severe phenotypes encompass Duchenne/Becker muscular dystrophy (DMD/BMD).

Conclusions:

  • Dystrophinopathies represent a spectrum of genetic muscle disorders.
  • Understanding the variability is crucial for diagnosis and management.
  • Ongoing research continues to expand the known phenotypes related to the Xp21 gene.