Scientists Transform Aging Blood Cells into Younger Neural Stem Cells
Researchers at the University Hospital of Bonn and the University of Bonn in Germany have successfully transformed aged blood cells into younger neural stem cells, according to ScienceAlert. The study, published in Aging Cell, demonstrates a direct conversion method that bypasses the need to revert cells to a pluripotent state, offering a new pathway for cellular rejuvenation.
Direct Conversion Method Yields Rejuvenated Cells
The team used erythroid progenitor cells (EPCs) from 15 donors aged newborn to 101 years. By delivering two transcription factors via a virus, they directly converted these blood cells into induced neural stem cells (iNSCs). Within 12 days, the cells began expressing neural-like proteins, as reported by UA.News. The epigenetic age of the converted cells declined over 50 to 100 days, reaching approximately 5% of the donor’s original age.
“The cells became 60 years younger in 50 days,” the study noted, highlighting the potential for reversing cellular aging. The process also reduced DNA damage and mitochondrial toxicity, with rejuvenation continuing even under conditions that limited cell division.
Epigenetic Rejuvenation Confirmed Through Multiple Metrics
To validate the results, researchers employed DNA methylation analysis and RNA sequencing. Oliver Brüstle, director of the Institute of Reconstructive Neurobiology, emphasized that the epigenetic changes ensured the cells “behaved like young cells.” The study found that the rejuvenation process was not dependent on cell proliferation, suggesting broader applications for aging research.
However, the research faced limitations, including the absence of naturally aged neural stem cells for comparison and potential discrepancies between in vitro and in vivo cell behavior, as noted by UA.News.
Potential Therapeutic Applications in Neurodegeneration
The findings could pave the way for treating neurodegenerative diseases. Previous experiments in mice showed that similar engineered cells formed connections with existing neural cells, indicating therapeutic viability. Brüstle highlighted the study’s value as an experimental model, allowing researchers to investigate factors that influence rejuvenation over time.
“Rejuvenation that extends over several weeks is ideal for studying the process,” Brüstle said, adding that the method could help identify substances that accelerate or slow aging.
Did You Know?
The study’s direct conversion technique skips the pluripotent “blank slate” stage.
FAQ
How long did the rejuvenation process take?
The epigenetic age of the cells declined over 50 to 100 days, with most age-related markers resetting within 50 days, according to UA.News.
What role did the virus play in the process?
A virus was used to deliver transcription factors that reprogrammed the cells. This method enabled direct conversion without reverting to a pluripotent state, as reported by ScienceAlert.
What are the implications for human health?
The method’s ability to rejuvenate cells independently of division could open new avenues for aging research.
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