Abstract:
BACKGROUND:Although the outcome of islet transplantation has improved, there remains a major obstacle in isolating viable islets from prolonged preserved pancreas. We previously reported that the two-layer cold storage method (TLM) improved the yield and in vitro function. In this study, we performed in vivo accurate functional analyses of islets from TLM-preserved pancreas and investigated pancreatic duct cell viability, which may critically affect islet isolation. METHODS:Rat islets isolated from fresh pancreas (group 1), after preservation in the University of Wisconsin (UW) solution (group 2) or by the TLM (group 3), were examined by assessing islet yields, stimulation indices, cure rates after transplantation to diabetic nude mice, and trypan blue uptake of pancreatic duct cells. RESULTS:TLM significantly improved the islet yield compared with UW cold storage. The cure rates after transplantation were 100%, 0%, and 80% for groups 1, 2, and 3, respectively. This indicates that islet viability was well maintained even after 24 hr of TLM preservation. The percentages of nonviable duct cells were 4.1%+/-1.9%, 48.3%+/-8.0%, and 26.1%+/-21.4% in groups 1, 2, and 3, respectively, showing that the TLM was superior to UW as seen by this duct cell viability assessment. CONCLUSIONS:The TLM used for pancreas preservation before islet isolation results in excellent islet function in addition to improved islet yield comparable to freshly isolated islets. The underlying mechanism may be duct cell viability maintained during TLM preservation. Therefore the TLM is an excellent preservation technique for isolating sufficient numbers of highly viable islets.
journal_name
Transplantationjournal_title
Transplantationauthors
Kakinoki K,Fujino Y,Suzuki Y,Li S,Tanioka Y,Sakai T,Kuroda Ydoi
10.1097/01.tp.0000154914.34121.72subject
Has Abstractpub_date
2005-06-15 00:00:00pages
1516-21issue
11eissn
0041-1337issn
1534-6080pii
00007890-200506150-00009journal_volume
79pub_type
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