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Published on: November 1, 2018
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Deep-supercooling Preservation for Rat Kidneys
Yunkai Li1,2, Zhijie Li1,2, Lanlan Peng1,2
1The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University, Xi'an, China.
Transplantation
|November 6, 2025
Summary
Deep-supercooling (DSC) preservation at -10°C extends kidney viability fourfold compared to static cold storage (SCS). This novel method improves graft quality and addresses organ shortages for transplantation.
Area of Science:
- Biomedical Engineering
- Organ Transplantation
- Cryobiology
Background:
- Critical shortage of transplantable organs necessitates improved preservation methods.
- Static cold storage (SCS) limits kidney preservation to 24 hours at 4°C.
- Suboptimal efficacy of SCS drives the need for advanced preservation technologies.
Purpose of the Study:
- To pioneer deep-supercooling (DSC) for ice-free rat kidney preservation at -10°C.
- To systematically compare DSC efficacy against conventional SCS.
- To establish the maximum viable preservation window for DSC kidney storage.
Main Methods:
- Rat kidneys were preserved using SCS (4°C) or DSC (-10°C) for 24, 96, or 168 hours.
- Normothermic reperfusion was performed on subset groups.
- Comprehensive biomarker profiling assessed functional, metabolic, and structural integrity.
Main Results:
- DSC maintained stable supercooled preservation at -10°C.
- 24-hour DSC storage showed superior functional recovery, enhanced glomerular filtration, optimized energy homeostasis, and attenuated ischemic injury compared to SCS.
- 96-hour DSC preservation yielded results comparable to 24-hour SCS, quadrupling the functional preservation window.
Conclusions:
- DSC is a paradigm-shifting advancement in renal preservation, extending viable storage duration fourfold.
- DSC improves graft quality compared to SCS.
- The technique's simplicity makes it a clinically translatable solution to increase donor organ utilization.
