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Efficacy of the Oxygen-Charged Static Two-Layer Method for Short-Term Pancreas Preservation and Islet Isolation From Nonhuman Primate and Human Pancreata

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Previous reports indicate that the two-layer method (TLM) of human pancreas preservation is superior to University of Wisconsin solution (UW) when pancreata are preserved for extended periods (i.e., >24 h) prior to islet isolation. In this study, the efficacy of using the TLM for preserving pancreata for short periods (i.e., <13 h) was evaluated using both nonhuman primate and human pancreata preserved with a TLM kit precharged with oxygen. An oxygen precharged TLM (static TLM) was established and compared with the original TLM with continuous oxygen supply. For the static TLM, the perfluorochemical was fully oxygenated and the oxygen supply removed prior to pancreas preservation. In the primate model, pancreata were preserved by the static TLM, the original TLM, and UW for 5 h prior to islet isolation. In the human model, pancreata were preserved with the static TLM or the original TLM or UW for 4–13 h. Both primate and human pancreata were processed by intraductal collagenase injection and digestion followed by continuous density gradient purification to isolate islets. Islets were assessed for islet yield, purity, viability, and in vitro functionality. In the primate model, islet yield, viability, and in vitro functionality were significantly improved by both the static TLM and the original TLM with similar results. Postculture islet yields were 23,877 ± 3619 IE/g in the static TLM, 21,895 ± 3742 IE/g in the original TLM, and 6773 ± 735 IE/g in UW. In the human model, both the static TLM and the original TLM significantly increased islet yield compared with UW with postculture islet yields of 2659 ± 549 IE/g in the static TLM, 2244 ± 557 IE/g in the original TLM, and 1293 ± 451 IE/g in UW. Nonhuman primate and human pancreata stored in the static TLM, immediately upon procurement, yield isolated islets of a substantially higher quantity than when pancreata are stored in UW. Thus, the use of the static TLM should replace the use of UW for storage of pancreata during transport prior to islet isolation.
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Keywords: Key words: Nonhuman primate islet isolation (Macac

Document Type: Research Article

Affiliations: 1: †University of Washington Medical Center, Department of Surgery, Division of Transplantation, 1959 N.E. Pacific Street, Seattle, WA 98195 2: ‡University of Nebraska Medical Center, Department of Surgery, Section of Transplantation, 983285 Nebraska Medical Center, Omaha, NE 68498-3285 3: *Puget Sound Blood Center/Northwest Tissue Center, 921 Terry Avenue, Seattle, WA 98104 4: §Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kobe University, 7-5-2 Kusunoki-Cho Chuo-Ku Kobe, Japan 650 5: ¶University of Washington Medical Center, Department of Hematology, Division of Medicine, 1959 N.E. Pacific Street, Seattle, WA 98195

Publication date: 2002-01-01

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  • Cell Transplantation publishes original, peer-reviewed research and review articles on the subject of cell transplantation and its application to human diseases. To ensure high-quality contributions from all areas of transplantation, separate section editors and editorial boards have been established. Articles deal with a wide range of topics including physiological, medical, preclinical, tissue engineering, and device-oriented aspects of transplantation of nervous system, endocrine, growth factor-secreting, bone marrow, epithelial, endothelial, and genetically engineered cells, among others. Basic clinical studies and immunological research papers are also featured. To provide complete coverage of this revolutionary field, Cell Transplantation will report on relevant technological advances, and ethical and regulatory considerations of cell transplants. Cell Transplantation is now an Open Access journal starting with volume 18 in 2009, and therefore there will be an inexpensive publication charge, which is dependent on the number of pages, in addition to the charge for color figures. This will allow work to be disseminated to a wider audience and also entitle the corresponding author to a free PDF, as well as prepublication of an unedited version of the manuscript.

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