# NSF ATP-Bio stores human-scale pig kidneys at -150 °C for up to a year, then rewarms them

Canonical page: https://technooptimist.io/stories/nsf-atp-bio-stores-human-scale-pig-kidneys-at-150-c-for-up-to-a-year-780b778f
Date: 15 Oct 2026
About: [ATP-Bio (NSF Engineering Research Center)](https://technooptimist.io/companies/atp-bio.md) · [Organ Vitrification and Nanowarming](https://technooptimist.io/longevity/organ-vitrification-and-nanowarming.md)
Original source: https://atp-bio.org/press-release-landmark-study-demonstrates-first-successful-long-term-cryopreservation-and-nanowarming-of-human-scale-kidneys/

Researchers at NSF ATP-Bio turned pig kidneys of about 100 g, roughly human-scale, into a glass-like state, stored them at -150 °C for up to a year and rewarmed them with radiofrequency nanowarming. The organs recovered with minimal structural injury, and after transplantation they showed immediate normal blood flow and urine production. The team says long-term organ banking could improve recipient matching and reduce discards.

## Key facts

- Methods: the PEZ42 cryoprotectant, multithermic machine perfusion and radiofrequency nanowarming.
- Recovery was on par with organs exposed only to cryoprotectant, according to the release.
- The study used pig kidneys, not human organs; the release gives no sample size or post-transplant follow-up.
- Details are in a bioRxiv preprint that has not been peer-reviewed.
- No timeline for human trials or clinical use is given.

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