Muscling in: Gene therapies for muscular dystrophy target RNA

Joel R Chamberlain1, Jeffrey S Chamberlain

  • 1Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, Washington, USA. jrcham@uw.edu

Nature Medicine
|February 6, 2010
PubMed

Insights

Antisense oligonucleotides show promise for treating muscular dystrophies. New research also suggests some rhabdomyosarcomas may originate outside muscle, requiring further study of cancer-causing cells.

Area of Science:

  • Biomedical research
  • Genetics
  • Oncology

Background:

  • Muscle diseases encompass a spectrum from muscular dystrophies to rhabdomyosarcoma.
  • Duchenne muscular dystrophy and myotonic dystrophy are progressive muscle-degenerating conditions.
  • Rhabdomyosarcoma is a childhood cancer with subtypes exhibiting unique characteristics.

Purpose of the Study:

  • To review advances in treating muscular dystrophies using antisense oligonucleotides.
  • To explore the implications of rhabdomyosarcoma research resembling acute leukemia.
  • To highlight the need for understanding the cellular origins of certain rhabdomyosarcomas.

Main Methods:

  • Review of studies on antisense oligonucleotide therapies for Duchenne muscular dystrophy and myotonic dystrophy.
  • Analysis of clinical findings in rhabdomyosarcoma cases with acute leukemia-like features.
  • Integration of findings with broader research on cancer cell origins.

Main Results:

  • Antisense oligonucleotides represent a potential therapeutic strategy for specific muscular dystrophies.
  • Certain rhabdomyosarcomas share characteristics with acute leukemia, suggesting alternative origins.
  • Evidence indicates some rhabdomyosarcomas may arise from non-muscle tissues.

Conclusions:

  • Antisense oligonucleotide therapy offers a promising avenue for muscular dystrophy treatment.
  • Understanding the cellular origins of rhabdomyosarcoma is crucial for effective treatment strategies.
  • Further research is needed to elucidate the cell types involved in rhabdomyosarcoma development.

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...
Formation of Muscle Fibers from Myoblasts01:13

Formation of Muscle Fibers from Myoblasts

De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription factors...
Master Transcription Regulators02:23

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin01:26

Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin

Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
The binding of dantrolene to the RYR1...