Abstract
Pancreatic β-cell loss represents a key factor in the pathogenesis of diabetes. Since the influence of purinergic signaling in β-cell apoptosis has not been much investigated, we examined the role of the ADP receptor P2Y13 using the pancreatic insulinoma-cell line MIN6c4 as a model system. Real time-PCR revealed high expression of the ADP receptors P2Y1 and P2Y13. Adding the ADP analogue, 2MeSADP, to MIN6c4 cells induced calcium influx/mobilization and inhibition of cAMP production by activation of P2Y1 and P2Y13, respectively. 2MeSADP reduced cell proliferation and increased Caspase-3 activity; both these effects could be fully reversed by the P2Y13 receptor antagonist MRS2211. We further discovered that blocking the P2Y13 receptor results in enhanced ERK1/2, Akt/PKB and CREB phosphorylation mechanisms involved in β-cell survival. These results indicate that P2Y13 is a proapoptotic receptor in β-cells as the P2Y13 receptor antagonist MRS2211 is able to protect the cells from ADP induced apoptosis.
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Acknowledgments
This study was supported by the Swedish Heart and Lung Foundation, Swedish Scientific Research Council, The Vascular Wall Program, and Lund University. David Erlinge is a holder of The Lars Werkö distinguished research fellowship from the Swedish Heart and Lung Foundation.
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Tan, C., Salehi, A., Svensson, S. et al. ADP receptor P2Y13 induce apoptosis in pancreatic β-cells. Cell. Mol. Life Sci. 67, 445–453 (2010). https://doi.org/10.1007/s00018-009-0191-3
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DOI: https://doi.org/10.1007/s00018-009-0191-3