Researchers tested a novel partial cellular reprogramming therapy in people with glaucoma that aims to rejuvenate retinal ganglion cells and restore their ability to transmit visual signals. Building on Yamanaka factor technology, the team delivered three transcription-factor genes (a modified set of the four Yamanaka factors) as proteins into the eye’s vitreous to shift damaged cells back to a more youthful, functional state without reverting them fully to embryonic-like cells. The approach was developed from David Sinclair’s epigenetic-noise theory and mouse work by Yuancheng Lu that regenerated ganglion cell connections; removing the fourth factor reduces cancer risk and allowed packaging into viral tools. The trial is a Phase 1 FDA-approved safety study in people with glaucoma.
Three participants received the injection and activated the factors by taking doxycycline for eight weeks, which functions as an on-off switch for the treatment. Researchers report no reprogramming-related adverse effects, only injection-related side effects, and early functional gains: two of three participants showed measurable improvement on visual-field tests eight weeks post-treatment. Investigators plan to test a higher dose and expand into other eye conditions such as NAION; preclinical data also suggest potential applicability to brain, liver, joint and other age-related tissues.
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