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ADP receptor P2Y(13) induce apoptosis in pancreatic beta-cells

Chanyuan Tan1, Albert Salehi, Siv Svensson

  • 1Department of Cardiology, Lund University, 22185 Lund, Sweden.

Cellular and Molecular Life Sciences : CMLS
|November 17, 2009
PubMed

Insights

Pancreatic beta-cell loss contributes to diabetes. This study reveals the ADP receptor P2Y(13) promotes beta-cell apoptosis, and its antagonist, MRS2211, protects these cells, offering a potential therapeutic target.

Area of Science:

  • Cell Biology
  • Endocrinology
  • Pharmacology

Background:

  • Pancreatic beta-cell loss is central to diabetes pathogenesis.
  • Purinergic signaling's role in beta-cell apoptosis is under-explored.

Purpose of the Study:

  • Investigate the function of the ADP receptor P2Y(13) in beta-cell apoptosis.
  • Determine the therapeutic potential of P2Y(13) antagonists.

Main Methods:

  • Utilized the MIN6c4 pancreatic beta-cell line.
  • Assessed gene expression via real-time PCR.
  • Measured calcium influx, cAMP production, cell proliferation, and Caspase-3 activity.
  • Examined ERK1/2, Akt/PKB, and CREB phosphorylation.

Main Results:

  • MIN6c4 cells express high levels of ADP receptors P2Y(1) and P2Y(13).
  • ADP analogue 2MeSADP activated P2Y(1) and P2Y(13), inhibiting cAMP and reducing proliferation.
  • 2MeSADP increased Caspase-3 activity, indicating apoptosis.
  • The P2Y(13) antagonist MRS2211 reversed these pro-apoptotic effects and enhanced survival signaling pathways.

Conclusions:

  • P2Y(13) acts as a pro-apoptotic receptor in pancreatic beta-cells.
  • Blocking P2Y(13) with MRS2211 protects beta-cells from ADP-induced apoptosis.
  • Targeting P2Y(13) may offer a novel strategy for managing diabetes.

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