Human islet distribution program for basic research at a single center.

The Clinical Islet Laboratory at the University of Alberta/Alberta Health Services distributes human islets for basic research when islet preparations fail to meet defined release criteria for transplantation. This report highlights our islet distribution activity for diabetes research over a 3-year period. Shipments of the acinar-enriched fraction for research were not included in this report. In 2010, we distributed 6.3 million islet equivalents (IEQs) of islets through 127 shipments to 8 researchers, locally, nationally, and internationally. The number of preparations for research use was stable over the 3-year period (26, 23, and 29 preparations in 2008, 2009, and 2010, respectively). Islet yield distributed for research per isolation was 201, 212, and 218 × 10(3) IEQs, respectively. The number of basic researchers was stable as well, although there were only 2 researchers before 2007. Recently, each researcher has received fewer islets per shipment (49,820 IEQs in 2010 vs 75,635 IEQs in 2008) but more frequently (21.5 in 2010 vs 11.2 times per year in 2008). This paradigm shift would be desirable for researchers, because in our experience, most require <30,000 IEQs per shipment, and more frequent islet shipments results in a larger sample size for experimentation. After an initial expansion in the number of researchers requesting islets, our islet distribution activity has remained stable over the years in terms of total productivity of islets utilized for research. The current supply-versus-demand ratio in our program appears to be appropriate.