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Related Concept Videos

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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 cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
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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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Updated: Mar 15, 2026

Single Myofiber Culture Assay for the Assessment of Adult Muscle Stem Cell Functionality Ex Vivo
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Reversal of Aged Muscle Stem Cell Dysfunction.

James W Larrick1,2, Jasmine W Larrick1, Andrew R Mendelsohn1,2

  • 11 Panorama Research Institute, Sunnyvale, California.

Rejuvenation Research
|September 11, 2016
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Aging muscle stem cells (MuSCs) decline in number and function, impairing muscle repair. Restoring fibronectin and β1-integrin may improve aged MuSC function.

Keywords:
agingextracellular mileauregenerationstem cells

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Area of Science:

  • Muscle stem cell biology
  • Aging and regeneration
  • Extracellular matrix interactions

Background:

  • Muscle stem cell (MuSC) decline with aging impairs muscle repair after injury or surgery.
  • Prolonged immobility worsens muscle mass loss and patient morbidity.
  • The stem cell niche, including fibronectin (FN) and β1-integrin, regulates MuSC function.

Purpose of the Study:

  • To investigate the role of fibronectin and β1-integrin in age-related MuSC dysfunction.
  • To explore potential therapeutic strategies for enhancing aged MuSC function.

Main Methods:

  • Analysis of MuSC numbers and function in aging muscle.
  • Investigation of fibronectin and β1-integrin levels and activity.
  • Assessment of the impact of fibronectin and β1-integrin on MuSC regeneration and homeostasis.

Main Results:

  • Reduced amounts and/or function of β1-integrin and fibronectin are critical in the decline of MuSC regeneration with aging.
  • These factors are key to the loss of MuSC homeostasis in elderly individuals.

Conclusions:

  • Fibronectin and β1-integrin are critical for maintaining muscle stem cell function during aging.
  • Replacing fibronectin or stimulating β1-integrin may offer novel therapeutic approaches to counteract age-related decline in muscle regeneration.