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Updated: Jul 23, 2025
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Human Pancreatic Islet Isolation: Part II: Purification and Culture of Human Islets
Published on: May 26, 2009
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Continuous vs. discontinuous purification of isolated human islets: functional and morphological comparison
Antoine Buemi1, Nizar I Mouard2, Tom Darius1
1Department of Surgery, Cliniques Universitaires Saint Luc, Université Catholique de Louvain, Surgery and Abdominal Transplantation Unit, Brussels, Belgium.
Frontiers in Endocrinology
|July 17, 2023
Summary
Discontinuous islet purification using a bottle method offers comparable yield and function to the COBE 2991 system. This alternative technique yields larger pancreatic islets, crucial for transplantation research.
Area of Science:
- Endocrinology
- Transplantation Biology
- Cell Biology
Background:
- The COBE 2991 cell processor, a standard for pancreatic islet isolation, is unavailable in Europe.
- This necessitates the development of alternative purification methods with comparable efficacy.
Purpose of the Study:
- To evaluate the efficacy of a discontinuous islet purification method using a bottle technique.
- To compare this method against the conventional continuous purification using the COBE 2991 system.
Main Methods:
- Human pancreas donors (n=4 for continuous, n=8 for discontinuous) were used.
- Islet yield, purity, and dynamic glucose-stimulated insulin secretion were assessed.
- Islet size distribution was analyzed for both purification methods.
Main Results:
- Discontinuous purification yielded comparable islet equivalents (79,625 vs. 76,292) and purity (55% vs. 78.75%) to continuous methods.
- Islet function, measured by stimulation index and insulin secretion, was similar between groups.
- Discontinuous purification resulted in significantly larger islets compared to the continuous method.
Conclusions:
- Discontinuous islet purification with a bottle method is a viable alternative to the COBE 2991 system.
- This method achieves similar islet isolation yield and secretory function.
- The discontinuous method produces larger islets, potentially beneficial for transplantation.
