Journal
TRANSPLANTATION PROCEEDINGS
Volume 40, Issue 2, Pages 375-378Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.transproceed.2008.01.014
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Strategies inhibiting cell death signaling pathways may enhance the availability of islet transplantation for patients with type 1 diabetes mellitus. The epsilon isoform of protein kinase C (PKCE) has been shown to have an anti-apoptotic effect in many cell types. The present study investigated whether activation of PKCe may improve the yield of functional islet cells for transplantation. Islet cells were isolated from wild-type BALB/c mice preconditioned with either a PKCe activator (Psi epsilon RACK) or a TAT carrier control peptide and further treated with the same agents during isolation and in vitro for either 0, 1, 16, or 40 hours. Islet cells were assessed at each time point for viability, apoptosis, and function. Psi epsilon RACK-treated islets showed significantly decreased islet cell death up to 40 hours after isolation compared with TAT-treated control islets. Beta-cell function in response to high glucose challenge remained unchanged.
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