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Hypoxia is the main threat to morphological and functional integrity of isolated pancreatic islets. Lack of oxygen seems to be of particular importance for functionality of encapsulated islets. The present study was initiated as an experimental model for the environment experienced by human islets in a confined space present during culture, shipment, and in an implanted macrodevice. Quadruplicate aliquots of isolated human islets (n = 12) were cultured for 24 h at 37°C under normoxic conditions using 24-well plates equipped with 8-µm pore size filter inserts and filled with islet aliquots adjusted to obtain a seeding density of 75, 150, 300, or 600 IEQ/cm(2). After culture viability, glucose-stimulated insulin release, DNA content as well as Bax and Bcl-2 gene expression were measured. Culture supernatants were collected to determine production of VEGF and MCP-1. Viability correlated inversely with IEQ seeding density (r = -0.71, p 

Original publication

DOI

10.3727/096368915X689929

Type

Journal article

Journal

Cell Transplant

Publication Date

2016

Volume

25

Pages

1539 - 1546

Keywords

Adult, Chemokine CCL2, Female, Humans, Hypoxia, Inflammation, Islets of Langerhans, Male, Middle Aged, Organ Culture Techniques, Proto-Oncogene Proteins c-bcl-2, Real-Time Polymerase Chain Reaction, Vascular Endothelial Growth Factor A, bcl-2-Associated X Protein