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News
Researchers in Bonn have found a way to dramatically reverse cellular aging in a test tube, converting blood cells from an 80-year-old into neural stem cells with a molecular age under 20. The slow, trackable process—unfolding over 100+ days—offers a powerful new model for studying rejuvenation. The findings could have major implications for understanding and treating neurodegenerative diseases like Alzheimer's.
Scientists at the University Hospital of Bonn and the University of Bonn have achieved a striking feat: turning aging human blood cells into youthful neural stem cells in the lab—and in doing so, resetting the cells' molecular clocks by as much as 60 years. The team used a cocktail of transcription factors to directly reprogram red blood cell precursors into neural stem cells, bypassing the usual intermediate step of creating pluripotent stem cells first.
What makes this approach especially valuable isn't just the rejuvenation itself—it's the pace of it. Unlike previous two-step methods where rejuvenation happened rapidly, this direct conversion unfolded gradually over more than 100 days, giving researchers an unprecedented window to study exactly how and why cells grow younger.
By the Numbers
Why it matters: Age is the single biggest risk factor for neurodegenerative diseases like Alzheimer's. A slow, controllable model of cellular rejuvenation gives scientists a powerful new tool to identify which factors speed up or slow down aging—potentially opening new doors for therapies targeting age-related brain diseases.
