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Type: Journal article
Title: Local sphingosine kinase 1 activity improves islet transplantation
Author: Rojas-Canales, D.
Penko, D.
Min, K.
Parham, K.
Peiris, H.
Haberberger, R.
Pitson, S.
Drogemuller, C.
Keating, D.
Grey, S.
Coates, P.
Bonder, C.
Jessup, C.
Citation: Diabetes, 2017; 66(5):1301-1311
Publisher: American Diabetes Association
Issue Date: 2017
ISSN: 0012-1797
Statement of
Darling Rojas-Canales, Daniella Penko, Kay K. Myo Min, Kate A. Parham, Heshan Peiris, Rainer V. Haberberger, Stuart M. Pitson, Chris Drogemuller, Damien J. Keating, Shane T. Grey, Patrick T. Coates, Claudine S. Bonder and Claire F. Jessup
Abstract: Pancreatic islet transplantation is a promising clinical treatment for type 1 diabetes, but success is limited by extensive β-cell death in the immediate posttransplant period and impaired islet function in the longer term. Following transplantation, appropriate vascular remodeling is crucial to ensure the survival and function of engrafted islets. The sphingosine kinase (SK) pathway is an important regulator of vascular beds, but its role in the survival and function of transplanted islets is unknown. We observed that donor islets from mice deficient in SK1 (Sphk1 knockout) contain a reduced number of resident intraislet vascular endothelial cells. Furthermore, we demonstrate that the main product of SK1, sphingosine-1-phosphate, controls the migration of intraislet endothelial cells in vitro. We reveal in vivo that Sphk1 knockout islets have an impaired ability to cure diabetes compared with wild-type controls. Thus, SK1-deficient islets not only contain fewer resident vascular cells that participate in revascularization, but likely also a reduced ability to recruit new vessels into the transplanted islet. Together, our data suggest that SK1 is important for islet revascularization following transplantation and represents a novel clinical target for improving transplant outcomes.
Keywords: Islets of Langerhans
Endothelial Cells
Mice, Knockout
Diabetes Mellitus, Experimental
Diabetes Mellitus, Type 1
Phosphotransferases (Alcohol Group Acceptor)
Islets of Langerhans Transplantation
Flow Cytometry
Cell Movement
Neovascularization, Physiologic
Real-Time Polymerase Chain Reaction
Rights: © 2017 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. More information is available at http://www.diabetesjournals .org/content/license.
DOI: 10.2337/db16-0837
Appears in Collections:Aurora harvest 3
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