An in vitro transcriptomic reprogramming screen identified the splicing factor SRSF1 as capable of lowering transcriptomic age in human cells while preserving cell identity, avoiding the dedifferentiation risk associated with Yamanaka-factor approaches. Follow-up work implicated SRSF1 in the regulation of aging in both nematodes and mice, positioning RNA splicing control as a tractable intervention point rather than a downstream consequence of aging.
Key Points
- SRSF1 reduced transcriptomic age without erasing cell identity
- Effect on aging confirmed across worms and mice
- RNA splicing control emerges as modifiable aging regulator
Longevity Analysis
Partial rejuvenation that leaves cellular identity intact addresses the central safety barrier in reprogramming research, where gains in biological youth have come at the cost of tumorigenic dedifferentiation. Splicing fidelity degrades with age across most tissues, and a single regulator with conserved effects from nematodes to mammals suggests the transcriptional noise of aging is partly correctable upstream rather than managed symptom by symptom. For practitioners, the near-term relevance lies in interpretation: transcriptomic age measures capture something mechanistically actionable about how tissues renew themselves, distinct from chronological markers.
Original published by Nature Aging, by Alexandru M. Plesa.