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How David Sinclair Is Trying to Reverse Aging

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Made with Eureka, a Nebulytic product. Illustrations are AI-generated and schematic; check the facts in the sources before relying on them. Made with Eureka, a Nebulytic product.

The question

Could growing old be less like a machine wearing out and more like a good recording that has been scratched, so that the data is still there and a reader could in principle be taught to read it again? Why it matters: if most of aging is lost regulatory information rather than permanent damage, then aging might be reversible in principle. That would change what medicine could aim for. If it is not, a lot of money and hope is being spent on the wrong target. THE SHORT ANSWER: David S

The short answer

David Sinclair's hypothesis (the "Information Theory of Aging") is that as cells repair DNA breaks, the proteins that organise which genes are read get pulled away and are never put back exactly right, so cells gradually lose their identity. His lab reports that briefly switching on three "reprogramming" genes (OSK) can reset that pattern. In mice this restored vision, and a first human safety trial is now under way. But the evidence is still mainly from mice, the human data is a handful of pati

Sources

  1. Sources relied on for the story brief and scenes. Items marked "not opened" were read only through summaries or secondary reports: **to be verified by author** against the primary text before quoting numbers. Nothing here is invented; where a detail is uncertain it is said so.
  2. Takahashi K, Yamanaka S. "Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors." *Cell* 126:663-676, 2006. (cited via citation lists; to be verified by author)
  3. Nobel Assembly. "The Nobel Prize in Physiology or Medicine 2012" (Gurdon and Yamanaka). nobelprize.org.
  4. Horvath S. "DNA methylation age of human tissues and cell types." *Genome Biology* 14:R115, 2013. (details via search summary; to be verified by author)
  5. Alberts B et al. *Molecular Biology of the Cell* (textbook figures: DNA length, chromatin, histones, double-strand breaks).
  6. Allis CD, Jenuwein T. "The molecular hallmarks of epigenetic control." *Nature Reviews Genetics* 17:487-500, 2016. (not opened; to be verified by author)
  7. Oberdoerffer P et al. (Sinclair DA). "SIRT1 redistribution on chromatin promotes genomic stability but alters gene expression during aging." *Cell* 135:907-918, 2008. PMC2853975.
  8. Yang J-H et al. (Sinclair DA). "Loss of epigenetic information as a cause of mammalian aging." *Cell* 186:305-326, 2023 (ICE mouse). Secondary: Pan, Zhou, Zhang, *Signal Transduction and Targeted Therapy* 2023; *The Scientist*, "Epigenetic manipulations can accelerate or reverse aging in mice". (primary not opened; to be verified by author)
  9. Lu Y-R, Tian X, Sinclair DA. "The Information Theory of Aging." *Nature Aging* 3:1486-1499, 2023. DOI 10.1038/s43587-023-00527-6.
  10. Gomes AP et al. (Sinclair DA). "Declining NAD+ induces a pseudohypoxic state disrupting nuclear-mitochondrial communication during aging." *Cell* 155:1624-1638, 2013. (secondary summary opened)
  11. López-Otín C et al. "Hallmarks of aging: an expanding universe." *Cell* 186:243-278, 2023. (not opened; to be verified by author)
  12. Abad M et al. (Serrano M). "Reprogramming in vivo produces teratomas and iPS cells with totipotency features." *Nature* 502:340-345, 2013.
  13. Ocampo A et al. (Izpisua Belmonte JC). "In vivo amelioration of age-associated hallmarks by partial reprogramming." *Cell* 167:1719-1733, 2016. (secondary summary opened)
  14. Lu Y et al. (Sinclair DA). "Reprogramming to recover youthful epigenetic information and restore vision." *Nature* 588:124-129, 2 Dec 2020. DOI 10.1038/s41586-020-2975-4. (secondary coverage opened; details such as mouse ages and Tet arms to be verified by author)
  15. Browder KC et al. "In vivo partial reprogramming alters age-associated molecular changes during physiological aging in mice." *Nature Aging* 2:243-253, 2022. (secondary summary)
  16. Macip CC et al. "Gene therapy-mediated partial reprogramming extends lifespan and reverses age-related changes in aged mice." *Cellular Reprogramming* 26:24-32, 2024 (Rejuvenate Bio; company paper). Preprint: bioRxiv 10.1101/2023.01.04.522507.
  17. Gossen M, Bujard H et al. "Transcriptional activation by tetracyclines in mammalian cells." *Science* 268:1766-1769, 1995 (Tet-On principle). (not opened; to be verified by author)
  18. Naso MF et al. "Adeno-Associated Virus (AAV) as a Vector for Gene Therapy." *BioDrugs* 31:317-334, 2017. (not opened; to be verified by author)
  19. Life Biosciences, "FDA Clearance of IND Application for ER-100 in Optic Neuropathies," 28 Jan 2026 (lifebiosciences.com).
  20. Life Biosciences, "First Patient Dosed in Phase 1 Trial of ER-100," 9 Jun 2026.
  21. Life Biosciences, "First-in-Human Data from Ongoing Phase 1 Trial of ER-100," 8 Oct 2026.
  22. ClinicalTrials.gov NCT07290244 (identifier taken from the company releases; the registry page was not opened; to be verified by author).
  23. Regalado A. "The first human test of a rejuvenation method will begin 'shortly'." *MIT Technology Review*, 27 Jan 2026.
  24. The Ophthalmologist, July 2026 (trial entry; not opened).
  25. Yang J-H, Petty CA et al. (Sinclair DA). "Chemically induced reprogramming to reverse cellular aging." *Aging* 15(13):5966-5989, 12 Jul 2023. DOI 10.18632/aging.204896.
  26. Fortune, 18 Jul 2023: reactions from Kaeberlein and Brenner. (secondary; no independent replication was found in the research pass; to be verified by author)
  27. Sinclair D, LaPlante M. *Lifespan: Why We Age and Why We Don't Have To.* Atria, 2019 (not opened; routine described via secondary summaries; to be verified by author).
  28. Howitz KT et al. "Small molecule activators of sirtuins extend Saccharomyces cerevisiae lifespan." *Nature* 425:191-196, 2003. (not opened)
  29. Nature News blog, "Row over resveratrol rumbles on"; BioEdOnline coverage of the resveratrol controversy. (secondary)
  30. Systematic review of randomized trials of NMN supplementation, PMC11365583 (2024). (secondary summary opened)

Image credits

  • Editor5627, CC BY-SA 4.0, via Wikimedia Commons · source
  • National Institutes of Health, Public domain, via Wikimedia Commons · source
  • Aaron Jacobs from Los Angeles, CA, CC BY-SA 2.0, via Wikimedia Commons · source
  • Pogrebnoj-Alexandroff, CC BY-SA 3.0, via Wikimedia Commons · source
  • Rapidreflex, CC BY-SA 4.0, via Wikimedia Commons · source
  • Jernej Furman from Slovenia, CC BY 2.0, via Wikimedia Commons · source
  • Thamizhpparithi Maari, CC BY-SA 3.0, via Wikimedia Commons · source

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