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Cryopreservation of precision-cut rat liver slices using a computer-controlled freezer
W J Maas1, W R Leeman, J P Groten
1TNO Nutrition and Food Research, Department of Explanatory Toxicology, PO Box 360, 3700, AJ Zeist, The Netherlands. maas@voeding.tno.nl
Summary
Slow freezing successfully cryopreserved primary rat hepatocytes. However, this technique showed limited success for cryopreserving precision-cut liver slices, with reduced viability after culturing.
Area of Science:
- Hepatology
- Cryobiology
- In vitro toxicology
Background:
- Precision-cut liver slices are vital for in vitro studies of hepatic toxicity and xenobiotic metabolism.
- Efficient cryopreservation is crucial for conserving valuable liver tissue.
- Optimal cryopreservation methods for liver slices remain undetermined, unlike established protocols for hepatocytes.
Purpose of the Study:
- To evaluate the efficacy of computer-controlled slow freezing for cryopreserving rat liver slices.
- To compare the cryopreservation outcomes of liver slices with those of primary hepatocytes.
Main Methods:
- Utilized computer-controlled slow freezing, a technique not previously detailed for liver slices.
- Applied the slow freezing method, successful for hepatocytes, to rat liver slices.
- Assessed slice viability immediately post-thaw and after subsequent culturing.
Main Results:
- Immediately after thawing, rat liver slices exhibited 60-100% viability compared to fresh controls.
- Post-thaw culturing led to a significant reduction in liver slice viability.
- The viability decrease in cultured liver slices was more pronounced than in cryopreserved hepatocytes.
Conclusions:
- Slow freezing is an effective method for cryopreserving primary rat hepatocytes.
- The slow freezing technique offers limited utility for cryopreserving precision-cut rat liver slices due to post-thaw culture viability loss.