Preprint Article Version 1 NOT YET PEER-REVIEWED

Uridine Triphosphate Thio-analogues Inhibit Platelet P2Y12 Receptors and Aggregation

  1. Department of Cardiology/Angiology, University Hospital Giessen, 35392 Giessen, Germany
  2. Department of Neurology, University Hospital Giessen, 35392 Giessen, Germany
  3. Department of Cardiology/Angiology, Hannover Medical School, 30625 Hannover, Germany
  4. Department of Cardiology/Angiology, University Hospital, Marburg, 35392 Giessen, Germany
  5. Institute for Clinical Immunology and Transfusion Medicine, Justus Liebig University, Giessen, 35385 Giessen, Germany.
Version 1 : Received: 6 November 2016 / Approved: 8 November 2016 / Online: 8 November 2016 (10:23:48 CET)

How to cite: Guenduez, D.; Tanislav, C.; Sedding, D.; Parahuleva, M.; Santoso, S.; Troidl, C.; Hamm, C.; Aslam, M. Uridine Triphosphate Thio-analogues Inhibit Platelet P2Y12 Receptors and Aggregation. Preprints 2016, 2016110048 (doi: 10.20944/preprints201611.0048.v1). Guenduez, D.; Tanislav, C.; Sedding, D.; Parahuleva, M.; Santoso, S.; Troidl, C.; Hamm, C.; Aslam, M. Uridine Triphosphate Thio-analogues Inhibit Platelet P2Y12 Receptors and Aggregation. Preprints 2016, 2016110048 (doi: 10.20944/preprints201611.0048.v1).

Abstract

Platelet P2Y12 is an important ADP receptor that is involved in agonists-induced platelet aggregation and is an important target for the development of anti-platelet aggregation drugs. Here the effects of thio-analogues of uridine triphosphate (UTP) on ADP-induced platelet aggregation are characterised. Using human platelet rich plasma we demonstrate that UTP inhibits P2Y12 but not P2Y1 receptors and antagonises ADP-induced platelet aggregation in a conc.-dependent manner with an IC50 value of ~250 mM against ADP (10 mM). An 8-fold increase in the platelet inhibitory activity was observed with 2-thio analogue of UTP (2S-UTP) with an IC50 value of 30 mM. A 33-fold increase in anti-platelet aggregation activity was observed with 4-thio analogue (4S-UTP) with an IC50 value of 7.5 mM. However, a 3-fold decrease in activity was observed by introducing an isobutyl group at the 4S- position. A complete loss in anti-platelet aggregation activity was observed with thio-modification of gamma phosphate of the sugar moiety which yields an enzymatically stable analogue. The interaction of UTP analogues with P2Y12 receptors was further verified by P2Y12 receptor binding assay and cAMP assay. The novel data demonstrate for the first time that 2- and 4-thio analogues of UTP are potent P2Y12 receptor antagonists that can be useful candidates for therapeutic intervention.

Subject Areas

2S-UTP; 4S-UTP; P2Y12 receptors; ADP; platelet aggregation

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