DEVELOPMENT OF METHODS TO IMPROVE ISOLATED PANCREATIC ISLET FUNCTION

$62,968P51FY2007RRNIH

University Of Wisconsin-Madison, Madison WI

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Abstract

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. To develop new methods for the isolation and evaluation of isolated pancreatic islets for the purpose of [unreadable] transplantation into patients with type I diabetes.[unreadable] [unreadable] The results obtained using non-human primate tissue will aid in the development of methodologies for the isolation [unreadable] and assessment of human islets. Methods include; 1) characterization of the physiological response to glucose as a [unreadable] rapid potency indicator of the quality of the islet preparation prior to transplantation,. 2)- determination of the [unreadable] effects of hypoxia on islet viability and function after isolation, 3) determination of the sensitivity of islets to [unreadable] cytokine induced apoptosis. Determination of viability and apoptosis will be performed using a novel approach in [unreadable] which islets can be analyzed intact, preserving their complete architecture using Complex Object Parametric [unreadable] Analyzer and Sorter (COPAS) flow cytometry. We will also evaluate the ability of COPAS viability and apoptosis [unreadable] measurements to provide predictive data on islet function after transplantation using a marginal mass model of [unreadable] human islet transplant in streptozotocin-induced diabetic immunodeficient mice. In addition, the development of [unreadable] rapid, accurate, and predictive tests of islet viability and function post isolation will contribute to significant [unreadable] improvements in post transplant success. This research used WNPRC Research Services.

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