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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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EVs from Stem Cells Improve Mitochondrial Dysfunction in Neuronal Disorders.

Sadaf Jahan1,2, Dipak Kumar3, Shaheen Ali4,5

  • 1Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, 11952, Al-Majmaah, Saudi Arabia. jahan149@gmail.com.

Molecular Neurobiology
|December 19, 2025
PubMed
Summary
This summary is machine-generated.

Stem cell-derived extracellular vesicles (EVs) show promise for treating neurodegenerative diseases by restoring mitochondrial function. These EVs deliver therapeutic cargo to repair neuronal damage and combat oxidative stress, offering a novel cell-free therapy.

Keywords:
Extracellular vesiclesMitochondrial dysfunctionNeurodegenerationNeuronal disordersOxidative stressStem cells

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biomedical Engineering

Background:

  • Mitochondrial dysfunction is central to neurodegenerative diseases like Alzheimer's, Parkinson's, and multiple sclerosis.
  • Cellular stressors induce mitochondrial dysfunction, leading to oxidative stress and neuronal injury.
  • Stem cell-derived extracellular vesicles (EVs) are emerging as a therapeutic strategy for central nervous system (CNS) disorders.

Purpose of the Study:

  • To explore the therapeutic potential of stem cell-derived EVs in reversing mitochondrial dysfunction in CNS disorders.
  • To investigate the mechanisms by which EVs restore mitochondrial homeostasis and prevent neuronal injury.
  • To highlight EVs as a cell-free therapeutic approach for neurodegenerative diseases.

Main Methods:

  • Review of emerging evidence on stem cell-derived EVs (from MSCs, NSCs, iPSCs) and their therapeutic effects.
  • Analysis of EV cargo, including nucleic acids, proteins, and mitochondria, and their role in intercellular communication.
  • Examination of EV capacity to cross the blood-brain barrier (BBB) for targeted CNS delivery.

Main Results:

  • Stem cell-derived EVs enhance mitochondrial function in injured neuronal cells, improving oxygen consumption and respiratory capacity.
  • EV molecular cargo, such as miR-21 and miR-29, regulates mitochondrial biogenesis, reduces oxidative stress, and modulates apoptosis and mitophagy.
  • EVs demonstrate the ability to cross the BBB, enabling minimally invasive, targeted delivery to the CNS.

Conclusions:

  • Stem cell-derived EVs offer a promising cell-free therapeutic strategy for neurodegenerative and inflammatory CNS disorders.
  • EVs can restore mitochondrial homeostasis by delivering functional cargo and improving cellular metabolism.
  • Targeted delivery of EVs across the BBB presents a novel approach to treating complex neurological conditions.