Direct conversion of human blood-derived erythroid progenitors into induced neural stem cells using SOX2 and cMYC produces substantial epigenetic de-aging, with cells retaining only about 13% of donor age at low passage and 5% at high passage, even from donors up to 101 years old. Unlike the rapid resetting seen during pluripotent reprogramming, this de-aging unfolds gradually over weeks and continues when proliferation is blocked. The slow kinetics make this system a tractable model for separating age reversal from cell division and identity change.
Key Points
- Blood-derived neural stem cells retained only 5%-13% of donor epigenetic age
- Epigenetic de-aging proceeded for weeks without requiring sustained cell proliferation
- Age-related transcriptomic and cellular hallmarks disappeared with extended conversion time
Longevity Analysis
Separating epigenetic age reversal from proliferation challenges the assumption that cellular rejuvenation requires dilution through division, and points toward mechanisms that operate on methylation architecture directly. The persistence of de-aging in donors beyond a century indicates that chronological age imposes no ceiling on the regenerative potential of somatic cells, a finding with implications for autologous neural repair and for how biological age is interpreted as a modifiable rather than fixed quantity. The protracted timeline is itself the useful feature, offering a window in which the molecular steps of rejuvenation can be observed and eventually targeted.
Original published by Wiley Aging Cell, by Lea Jessica Berg, Julia Franzen, Andreas Buness, Rachel Konang, Chao Sheng, Michael Peitz, Andreas Till, Wolfgang Wagner, Oliver Brüstle .