Functional rejuvenation of endothelial cell aging by transient reprogramming.
Level 5 - mechanism / opinion, no new human data
Preclinical in vitro bench research and animal model
PubMed 42360485 · doi:10.1007/s00395-026-01192-7
What was done
Replicative senescent endothelial cells (ECs) were treated in vitro with a pharmacological cocktail to induce non-genetic, transient overexpression of the Yamanaka factors (Oct3/4, Sox2, Klf4, and c-Myc). Gene expression of Yamanaka factors and senescence markers (p16ink4a, p14arf), qPCR-based telomere length, and functional cellular assays (proliferation, migration, sprouting, and tube formation) were measured. Functional longevity was assessed in long-term culture. In vivo recovery of blood flow was assessed in 21-month-old C57BL/6 mice subjected to a hind-limb ischemia model.
What was found
Pharmacological treatment increased expression of Oct3/4, Sox2, Klf4, and c-Myc (p < 0.05 and p < 0.01) and significantly reduced p16ink4a and p14arf (p < 0.01). Telomere length was stabilized, and proliferation, migration, sprouting, and tube formation improved (p < 0.05). Senescence marker reduction and migration enhancement persisted during long-term cultivation. In vivo, blood flow significantly improved at 7 and 14 days post-hind-limb ischemia (p < 0.001). Exact numerical values, effect sizes, and group sizes were not reported in the abstract.
Why it matters
This study demonstrates preclinical proof-of-concept that transient, non-genetic activation of Yamanaka factors can mitigate endothelial senescence and improve post-ischemic blood flow recovery in aged animal models.
Limits
The abstract reports no exact numerical values, effect sizes, or sample sizes (n) for the in vitro or animal experiments. The study is strictly preclinical (in vitro cell culture and aged mouse model), and translational safety, off-target dedifferentiation risks, and clinical applicability in humans remain unestablished.
Cited by
- supports Partial or interrupted cellular reprogramming with Yamanaka factors does not restore telomere length.