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Ann Thorac Surg 1996;61:542-545
© 1996 The Society of Thoracic Surgeons
Department of Thoracic Surgery, Chest Disease Research Institute, Kyoto University, Kyoto, Japan
Accepted for publication October 25, 1995.
Background and Methods. We have developed two types of preservation solutions containing trehalose. ET-Kyoto solution (ET-K) is an extracellular type and IT-Kyoto solution (IT-K) is an intracellular type. In the present study we examined with in vitro assays the ability of ET-K, IT-K, Euro-Collins (EC), and University of Wisconsin (UW) solutions to preserve a murine endothelial cell line. The viability of cells stored in the solutions at 4°C was determined by trypan blue exclusion and MTT assay.
Results. Trypan blue exclusion showed the viability after 48 hours of cold storage to be 49.5 ± 4.7% (mean ± standard error) in ET-K, 59.5 ± 0.7% in IT-K, 29.2 ± 2.5% in EC, and 55.3 ± 7.6% in UW (ET-K or UW versus EC, p < 0.05; IT-K versus EC, p < 0.01). MTT assay absorbance values for cells after 48 hours of cold storage were 0.366 ± 0.0066 (mean ± standard error) in ET-K, 0.358 ± 0.0044 in IT-K, 0.336 ± 0.011 in EC, and 0.362 ± 0.0019 in UW (ET-K or UW versus EC, p < 0.05). After 120 hours, absorbance values for cells were 0.303 ± 0.0038 in ET-K, 0.269 ± 0.0034 in IT-K, 0.186 ± 0.011 in EC, and 0.265 ± 0.0066 in UW (ET-K versus UW, p < 0.05; ET-K versus IT-K, p < 0.01; ET-K, IT-K or UW versus EC, p < 0.01).
Conclusions. As far as the ability to preserve a murine endothelial cell line at a low temperature was concerned, the ET-K solution was superior to the UW solution, the IT-K solution and UW solution were equal, and the ET-K and IT-K solutions were superior to the EC solution.
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