Impact of Hypothermic Preservation on Tissue Yield and Viability in Pig Pancreata
| Autor: | Clarence E. Foster, Morgan Lamb, Jonathan R. T. Lakey, David W. Chapman, Rahul Krishnan, Kelly Laugenour, Brian Buder, Michael Alexander |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
endocrine system
medicine.medical_specialty Adenosine Time Factors endocrine system diseases Swine Allopurinol Xenotransplantation medicine.medical_treatment Hypertonic Solutions Organ Preservation Solutions Cold storage Cold Ischemia Time Tissue Culture Techniques Andrology Islets of Langerhans Adenosine Triphosphate Raffinose medicine Animals Insulin Viaspan Pancreas Donor pool Tissue Survival Transplantation geography geography.geographical_feature_category business.industry Porcine islets Cold Ischemia Islet Glutathione Surgery Adenosine Diphosphate business |
| Zdroj: | Transplantation Proceedings. 46:1975-1977 |
| ISSN: | 0041-1345 |
| DOI: | 10.1016/j.transproceed.2014.05.077 |
| Popis: | Chronic shortage of quality human cadaveric pancreata limits islet transplantation. Porcine islet xenotransplantation is being explored to increase the donor pool. For clinical-ready islets, centralized animal husbandry, Current Good Manufacturing Practice-regulated processing facilities, and organ transportation support are required. Amount of cold ischemia time (CIT) before isolation significantly affects transplantation. The goal of this study was to determine the maximum safe CIT of whole pancreata before islet isolation.Pancreata were rapidly removed from Yorkshire pigs (age, 14-22 days) and stored in modified University of Wisconsin solution or in EuroCollins solution at 4(°)C. Pancreata were processed with 1 hour CIT (control) or stored for 4 or 12 hours before isolation. Islet yield and percent purity and viability were determined after 7 days of in vitro tissue culture and maturation. Samples from nonprocessed pancreata were collected and snap-frozen in liquid nitrogen at 0, 3, 6, 9, 12, 15, and 24 hours of preservation, then analyzed for adenosine diphosphate/adenosine triphosphate ratio as a measure of tissue energetics.Up to 12 hours in cold storage had no significant impact on overall islet yield after 7 days of in vitro culture compared with controls; islet yield at the end of the maturation process was 28,700 ± 500 islet equivalents per pancreas (mean ± SEM control yield, 30,300 ± 900 islet equivalents per pancreas); islet purity was 75 ± 5% compared with 74 ± 5% in controls. Islet viability was significantly reduced at 12 hours compared with controls (80 ± 6% vs 96 ± 5%; P .05). The tissue adenosine diphosphate/adenosine triphosphate ratio was maintained within the first 6 hours (1.6 ± 0.1 to 1.8 ± 0.2; P = NS) but was markedly increased during the 24-hour study (3.3 ± 0.1 at 24 hours), indicating a progressive loss of adenosine triphosphate tissue stores.Young pig pancreata can be hypothermically stored for up to 12 hours without affecting islet yield and purity; however, islet viability is reduced. These data highlight the need for uniform shipping parameters to standardize islet quality, ideally with CIT 6 hours. |
| Databáze: | OpenAIRE |
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