50 years ago, scientists hoped freezing donor organs would boost transplants

Excerpt from the August 19, 1972 issue of Science News

In 2019, scientists found a way to store human livers for more than a day at subzero temperatures without the organs freezing (shown). The technique could eventually help ease the shortage of donor organs, saving thousands of lives.

In 2019, scientists found a way to store human livers for more than a day at subzero temperatures without the organs freezing (shown). The technique could eventually help ease the shortage of donor organs, saving thousands of lives.

Massachusetts General Hospital

cover of the August 19, 1972 Science News

The icy world of organ freezing Science News, August 19, 1972

If whole organs could be frozen and stored … surgeons would be able to perform far more transplants…. For all their efforts, though, cryobiologists (biologists who study the effects of cold on life) have not been very successful with organ freezing…. Nobody to date has cooled whole mammalian hearts any lower [than −20° Celsius] or longer [than six hours] and revived them.

Update

Scientists still struggle to keep donor hearts on ice for longer than six hours, but it is now possible to store a different organ — the liver — at below-freezing temperatures for more than a day. The challenge has been figuring out how to stop ice from crystallizing and damaging cells. In 2019, scientists reported successfully warming up several human livers after supercooling them for 27 hours (SN: 10/12/19 & 10/26/19, p. 10). This and other preservation methods such as freezing at high pressures or thawing using nanoparticles aren’t yet ready for the operating room, but they have the potential to keep thousands of lifesaving organs from going to waste each year.

About Asa Stahl

Asa Stahl was the 2022 AAAS Mass Media fellow with Science News. He is a 5th year Astrophysics Ph.D. student at Rice University, where his research focuses on detecting and characterizing young stars and planets.