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Related Concept Videos

Satellite Stem Cells and Muscular Dystrophy01:21

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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...
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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...
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Formation of Muscle Fibers from Myoblasts01:13

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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.
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Cis-regulatory Sequences02:02

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Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
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The Sarcomere01:08

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A sarcomere is a microscopic segment repeating in a myofibril. The sarcomere fundamentally consists of two main myofilaments: thick filaments called myosin and thin filaments called actin. These filaments interact by sliding past each other in response to stimulus. In addition to myosin and actin, several other proteins, such as tropomyosin, troponin, titin, nebulin, myomesin, α-actinin, and dystrophin, play crucial roles in regulating, structuring, and functioning of the sarcomere.
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lncRNA - Long Non-coding RNAs02:39

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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Related Experiment Video

Updated: Jan 15, 2026

Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
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Local Non-Coding Regulatory Elements in Muscular Dystrophies.

Harry Wilton-Clark1, Sebastian Hernandez Rodriguez1, Toshifumi Yokota1

  • 1Department of Medical Genetics, University of Alberta, Edmonton, AB T6G 2R3, Canada.

International Journal of Molecular Sciences
|October 16, 2025
PubMed
Summary

Non-coding elements, not just proteins, significantly regulate muscular dystrophies. This review details common and disease-specific non-coding mechanisms impacting muscular dystrophy progression and function.

Keywords:
CMDDMDMDFSHDLGMDOPMDepigeneticslncRNAmiRNAncRNA

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Last Updated: Jan 15, 2026

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Area of Science:

  • Genetics
  • Molecular Biology
  • Neurology

Background:

  • Muscular dystrophies (MD) are debilitating genetic disorders causing progressive muscle weakness and degeneration.
  • Over 100 types of MD exist, each with unique genetic causes and pathological mechanisms.
  • Research traditionally focused on protein-coding genes, overlooking other regulatory elements.

Purpose of the Study:

  • To review common non-coding regulatory mechanisms implicated across multiple forms of muscular dystrophies.
  • To highlight specific non-coding elements driving individual muscular dystrophy types.
  • To provide a comprehensive overview of non-coding elements' role in MD.

Main Methods:

  • Literature review of studies on muscular dystrophies and non-coding genetic elements.
  • Synthesis of findings on common non-coding regulatory pathways.
  • Analysis of disease-specific non-coding element research.

Main Results:

  • Non-coding genetic elements are increasingly recognized as critical regulators in MD.
  • Common non-coding mechanisms influence multiple MD types.
  • Distinct non-coding elements are associated with specific muscular dystrophies.

Conclusions:

  • Non-coding genetic regulation plays a major role in the pathogenesis of muscular dystrophies.
  • Understanding these non-coding elements is crucial for developing targeted MD therapies.
  • Future research should further explore the non-coding landscape of MD.