Related Experiment Videos
Analysis of donor factors affecting human islet isolation with current isolation protocol
S Matsumoto1, G Zhang, S Qualley
1Islet and Cell Processing Laboratory, Puget Sound Blood Center/Northwest Tissue Center, University of Washington Department of Surgery, USA. shinichi@kuhp.kyoto-u.ac.jp
Transplantation Proceedings
|June 15, 2004
Summary
Donor selection is crucial for successful human islet isolation. Minimizing donor risk factors like elevated creatinine and prolonged preservation time significantly improves islet yield and transplantation success for type 1 diabetes.
Area of Science:
- Endocrinology
- Transplantation Immunology
- Regenerative Medicine
Background:
- Donor selection is critical for successful human islet isolation.
- Optimized isolation protocols necessitate re-evaluation of donor factors.
- Current protocols have improved, requiring updated donor criteria.
Purpose of the Study:
- To re-evaluate donor factors impacting human islet isolation success.
- To identify specific risk factors affecting islet yield and function.
- To refine donor selection criteria for improved transplantation outcomes.
Main Methods:
- Analysis of 31 human islet isolations using an automated method with protocol revisions.
- Inclusion of the two-layer method (TLM) for pancreas preservation.
- Utilization of Liberase enzyme and continuous density gradient for purification.
Main Results:
- Successful isolations ( >100,000 IE, SI >2.0) correlated with lower donor transaminases, creatinine, norepinephrine use, and shorter preservation times (<25 hours).
- The TLM extended viable pancreas preservation from 8 to 25 hours.
- Donors with no risk factors had an 87.5% success rate, versus 0% for those with two or more risk factors (P <.001).
Conclusions:
- Key risk factors for current human islet isolation protocols were identified.
- Implementing donor factor review can enhance consistency in islet isolation and transplantation.
- Improved donor selection is vital for advancing type 1 diabetes cures.