Frozen Pig Kidneys Brought Back to Life, Could End Organ Shortage
This could mean no more waiting lists for organ transplants.
Scientists have successfully frozen pig kidneys for more than a year, then warmed them up and showed they still work. The kidneys were cooled to -150 °C, turning them into a glass-like state. After rewarming, they regained color and produced urine—signs of normal function. When transplanted into pigs, the kidneys worked. This is the first time a large organ has been revived after long-term freezing.
The breakthrough could revolutionize organ transplants. Currently, human organs can only be kept for 24 to 36 hours, making it hard to match donors with recipients. If organs could be banked for months or years, doctors would have time to find the best match, reduce rejection risk, and even prepare patients in advance. This could save many of the tens of thousands of people waiting for transplants.
The team used a special technique: they infused the organ with tiny iron particles and then used a magnetic field to heat it evenly and quickly. This avoids ice crystals that would damage the organ. The work is still in early stages and hasn't been peer-reviewed, but experts call it a milestone. The next step is to test with human organs, which could take years.
- Pig kidneys were frozen for over a year and then successfully rewarmed and transplanted, working normally.
- This could lead to organ banking, where organs are stored for long periods, reducing wait times and improving matches for patients.
- The technique uses iron nanoparticles and magnetic fields to heat organs evenly without damage.
Why It Matters
This could end organ shortages, saving thousands of lives each year by making more organs available.