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Islet isolation for allotransplantation: variables associated with successful islet yield and graft function
1Medicine and Surgical Departments, S. Raffaele Scientific Institute, Via Olgettina 60, Milan, Italy. bertuzzi.federico@hsr.it
Diabetologia
|April 15, 2005
Summary
Efficient islet isolation is crucial for transplantation. Donor characteristics, pancreas quality, and enzyme activity significantly impact islet yield and transplant success, guiding selection criteria for improved outcomes.
Area of Science:
- Endocrinology and Metabolism
- Transplantation Biology
- Islet Cell Biology
Background:
- Efficient islet isolation is critical for successful islet transplantation.
- Current methods show unpredictable islet yield and quality, necessitating standardization.
Purpose of the Study:
- To analyze donor characteristics, pancreas procurement, and islet isolation procedures.
- To correlate these factors with islet yield and transplant outcomes.
Main Methods:
- Analysis of 437 pancreas isolations using an automated method since 1989.
- Correlation of donor data, pancreas procurement, digestion, and purification with islet yield.
- Enzyme characterization of pancreases and correlation with outcomes.
Main Results:
- Islet yield significantly associated with donor age, BMI, pancreas condition/weight, and enzyme activity.
- Multivariate analysis identified donor BMI, pancreas weight, digestion time, and total collagenase activity as key predictors of islet yield.
- Patient outcomes showed insulin reduction linked to islet morphology and C-peptide values to islet purity.
Conclusions:
- Established baseline criteria for donor selection, digestion, and purification in automated islet isolation.
- Morphological assessment of islets may serve as a clinically relevant predictor for transplant decisions.