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Hypothermic storage of equine isolated hepatocytes.

The aim of the study was to establish the optimal methods for hypothermic storage of equine isolated hepatocytes. Viability of equine isolated hepatocytes after hypothermic storage was dependent on the type of storage medium as well as on the cell density in the storage suspension and the preservation period. Hepatocytes stored at 4 degrees C in Hanks' Balanced Salt Solution (HBSS) and Williams' Medium E (WE) for 24 h showed very low viability, numerous cell membrane blebs, very low attachment rate (11.9 +/- 6.5% and 34.8 +/- 19.1%, respectively) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) reduction rate (6.4 +/- 3.9% and 25.1 +/- 14.8%, respectively). In contrast, hepatocytes stored in University of Wisconsin Solution (UW) after 24 h of storage at a density of 12.5 x 10(6) cells/ml showed high viability (over 70%), typical and intact morphology, high cell attachment rates and MTT reduction. Our findings clearly demonstrate that UW is a good preservation solution for equine isolated hepatocytes. Hepatocytes harvested from slaughterhouse organs can be stored at 4 degrees C in UW at a density of 12.5 x 10(6) cells/ml for at least 24 h without significant decrease in functional integrity.