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Title: Facilitated Engraftment of Isolated Islets Coated With Expanded Vascular Endothelial Cells for Islet Transplantation
Authors: Barba Gutierrez, D. Alonso
Daneri Navarro, Adrian
Villagomez Mendez, J. Jesus Alejandro
Kanamune, J.
Robles Murillo, A. Karina
Sánchez Enriquez, Sergio
Villafan Berna, José Rafael
Rivas Carrillo, Jorge David
Keywords: diabetes
Issue Date: Mar-2016
Publisher: Elsevier BV
Citation: Barba Gutierrez, D.A. et. al. (2016). Facilitated Engraftment of Isolated Islets Coated With Expanded Vascular Endothelial Cells for Islet Transplantation. Transplantation Proceedings. Vol, 48, núm. 2, pp: 669-672
Series/Report no.: Transplantation Proceedings;Vol, 48, núm. 2
Abstract: Background. Diabetes is complex disease, which involves primary metabolic changes followed by immunological and vascular pathophysiological adjustments. However, it is mostly characterized by an unbalanced decreased number of the b-cells unable to maintain the metabolic requirements and failure to further regenerate newly functional pancreatic islets. The objective of this study was to analyze the properties of the endothelial cells to facilitate the islet cells engraftment after islet transplantation. Methods. We devised a co-cultured engineer system to coat isolated islets with vascular endothelial cells. To assess the cell integration of cell-engineered islets, we stained them for endothelial marker CD31 and nuclei counterstained with DAPI dye. We comparatively performed islet transplantations into streptozotocin-induced diabetic mice and recovered the islet grafts for morphometric analyses on days 3, 7, 10, and 30. Blood glucose levels were measured continuously after islet transplantation to monitor the functional engraftment and capacity to achieve metabolic control. Results. Cell-engineered islets showed a well-defined rounded shape after co-culture when compared with native isolated islets. Furthermore, the number of CD31-positive cells layered on the islet surface showed a direct proportion with engraftment capacities and less TUNEL-positive cells on days 3 and 7 after transplantation. Conclusions. We observed that vascular endothelial cells could be functional integrated into isolated islets. We also found that islets that are coated with vascular endothelial cells increased their capacity to engraft. These findings indicate that islets coated with endothelial cells have a greater capacity of engraftment and thus establish a definitely vascular network to support the metabolic requirements.
Description: Artículo
ISSN: 0041-1345
Appears in Collections:3209 Artículos

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