Researchers at Texas A&M describe a new approach that boosts mitochondrial biogenesis in stem cells and transfers those mitochondria to aging or damaged cells. The authors note that mitochondrial decline is associated with aging, heart disease and neurodegenerative disorders, so restoring cellular energy could have broad clinical implications.
The work, published in Proceedings of the National Academy of Sciences, used microscopic flower-shaped nanoparticles—nanoflowers—alongside stem cells. In the presence of these nanoflowers, stem cells produced roughly twice the normal number of mitochondria. When placed near damaged cells, the boosted stem cells transferred two to four times more mitochondria than untreated ones, a several-fold increase in efficiency that the lead author described as better than expected.
Recipient cells regained energy production and function and resisted cell death, even after exposure to damaging agents such as chemotherapy drugs. The investigators called the treated stem cells "mitochondrial bio factories" and emphasized that the method did not require genetic modification or drugs.
The nanoparticles are made of molybdenum disulfide and remain inside cells, where they continue to promote mitochondria creation. Unlike small-molecule drugs that need frequent doses, nanoparticle-based therapies might require only monthly administration. The team suggested the method could be used in different tissues; for example:
- place stem cells near the heart to treat cardiomyopathy
- inject stem cells into muscle to address muscular dystrophy
The research received funding from the National Institutes of Health, the Welch Foundation, the Department of Defense and the Cancer Prevention and Research Institute of Texas, with additional support from Texas A&M sources.
Difficult words
- mitochondria — cell structure that makes energy for the cell
- biogenesis — process of creating new organelles or structures
- stem cells — undifferentiated cell that can form other cells
- nanoflowers — very small nanoparticle shaped like a flower
- nanoparticles — extremely small particle used in medicine
- molybdenum disulfide — a chemical material used to make nanoparticles
- Recipient cells — cell that receives something from another cell
- genetic modification — change to a cell's genes or DNA
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- What are possible benefits and risks of using nanoparticle-treated stem cells in medical treatment?
- How might monthly nanoparticle-based therapy change patient care compared with frequent drug doses?
- Do you think therapies that do not require genetic modification are easier to accept? Why or why not?
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