ChatGPT4b, an OpenAI model tailored for biological data, has been used by Retro Biosciences to enhance the effectiveness of Yamanaka factor proteins in cellular reprogramming, according to the company.
Cellular reprogramming involves reverting mature cells to a younger state by using four Yamanaka factors (Oct4, Sox2, Klf4, c‑Myc). Retro Biosciences claims that integrating ChatGPT4b into this process has increased reprogramming efficiency from about 1% to fiftyfold higher.
Retro said that the enhanced proteins dubbed RetroSOX and RetroKLF—substantially improve the yield of rejuvenated cells. The company is now planning follow-up experiments to determine whether the new factors can extend lifespan in mice without increasing tumor risk.
The company said that ChatGPT4b-driven protein engineering could accelerate the next stage of longevity research by moving from enhanced protein efficacy to animal studies. Retro aims to test whether the modified Yamanaka factors prolong healthy lifespan in vivo more safely than traditional versions.
In addition to cellular reprogramming, Retro Biosciences is pursuing autophagy and brain‑immune (microglia) programmes. The company said that AI integration across its initiatives may fast‑track development and reduce biological ageing.
This technology partnership highlights the growing role of AI in protein design. Retro said that ChatGPT4b may help place it ahead in the emerging race to develop safe and effective age‑reversal therapies.
