Why wait for total organ failure when we can partially reprogram cells in vivo? Transient cyclic expression of Yamanaka factors (OSK: Oct4, Sox2, Klf4—leaving out the oncogenic c-Myc) has already proven capable of resetting epigenetic clocks in mice without inducing teratomas (Sinclair Lab / Salk Institute). The challenge is delivery: AAV vectors trigger neutralizing antibodies, making repeat dosing impossible. The 2030 breakthrough will be mRNA-LNP delivery systems pulsing OSK factors systemically once every 6 months to rewind cellular age by 3-5 years per pulse.
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