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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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Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...
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A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Single Myofiber Culture Assay for the Assessment of Adult Muscle Stem Cell Functionality Ex Vivo
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Muscle stem cells at a glance.

Yu Xin Wang1, Nicolas A Dumont1, Michael A Rudnicki2

  • 1Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada Faculty of Medicine, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada.

Journal of Cell Science
|October 11, 2014
PubMed
Summary
This summary is machine-generated.

Muscle stem cells, also known as satellite cells, are crucial for skeletal muscle regeneration. Understanding their self-renewal and activation is key to developing therapies for muscle disorders.

Keywords:
RegenerationSatellite cellsSkeletal muscleStem cellsTherapy

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Area of Science:

  • Muscle stem cell biology
  • Skeletal muscle regeneration
  • Cellular therapies

Background:

  • Muscle stem cells (satellite cells) are essential for long-term skeletal muscle repair.
  • These cells remain quiescent in uninjured muscle but activate upon injury.
  • Their self-renewal capacity distinguishes them from committed myogenic progenitors.

Purpose of the Study:

  • To review the characteristics and therapeutic potential of satellite cells.
  • To provide an overview of key muscle stem cell hallmarks: quiescence, self-renewal, and commitment.

Main Methods:

  • Genetic experiments
  • Transplantation studies
  • Literature review

Main Results:

  • Satellite cells possess self-renewal capacity, enabling long-term regeneration.
  • Understanding molecular regulation is vital for therapeutic development.
  • Hallmarks include quiescence, self-renewal, and commitment.

Conclusions:

  • Muscle stem cells are critical for muscle regeneration and repair.
  • Further understanding of their regulation can lead to new treatments for muscle disorders.
  • Therapeutic strategies may involve modulating satellite cell behavior.