Journal article

Publication year: 2013

Pages: 548-557

Journal: Thrombosis Research: Vascular Obstruction, Hemorrhage and Hemostasis

Volume number: 132

Issue number: 5

ISSN: 0049-3848

DOI Link: https://doi.org/10.1016/j.thromres.2013.08.021

Publisher: Elsevier

Abstract: 

Background: Platelets express two ADP receptors namely P2Y(1) and P2Y(12) that regulate ADP and other agonists-induced platelet aggregation. P2Y1 receptor activation causes platelet shape change while P2Y(12) receptor activation induces platelet aggregation. Previously, anti-aggregatory effects of ATP on ADP-induced and pro-aggregatory effects on epinephrine-induced platelet aggregation have been reported. However, the effects of other nucleoside triphosphates on platelet aggregation have never been described. The aim of the present study was to characterise the effects of nucleoside triphosphates (ATP, UTP, GTP, and CTP) on agonist-induced platelet aggregation.

Methods: The experiments were performed on platelet rich plasma freshly isolated from blood donated by healthy human volunteers.

Results: All the nucleoside triphosphates tested inhibited ADP-and collagen-induced platelet aggregation in a concentration-dependent manner with a rank order of potency, 2MeSATP > ATP >= alpha,beta, methyleneATP > UTP >> CTP >= GTP. The IC50 values against ADP (10 mu M)-induced platelet aggregation were 0.039 +/- 0.013, 18 +/- 7, 25 +/- 6, 32 +/- 9, 360 +/- 130, and 400 +/- 160 mu M, respectively. Low concentrations of ATP induced platelet shape change which was due to contaminating ADP. However, higher concentrations antagonised ADP and MRS2365-induced platelet shape change. The ATP analogue alpha, beta, methyleneATP and CTP but not UTP and GTP also antagonised ADP-induced platelet shape change. Similarly, low ATP concentrations potentiated epinephrine-induced platelet aggregation that was abolished by P2Y(1) antagonist MRS2500 suggesting P2Y(1) receptor activation due to contaminating ADP. Higher ATP concentrations, alpha, beta, methyleneATP, UTP, CTP, and GTP antagonised epinephrine-induced platelet aggregation.

Conclusion: Thus, the data demonstrate nucleoside triphosphates in general act as P2Y(12) receptor antagonists and antagonise ADP-, collagen-, and epinephrine-induced platelet aggregation. (C) 2013 Elsevier Ltd. All rights reserved.

Harvard Citation style: Aslam, M., Sedding, D., Koshty, A., Santoso, S., Schulz, R., Hamm, C., et al. (2013) Nucleoside triphosphates inhibit ADP, collagen, and epinephrine-induced platelet aggregation: Role of P2Y₁ and P2Y₁₂ receptors., Thrombosis Research: Vascular Obstruction, Hemorrhage and Hemostasis, 132(5), pp. 548-557. https://doi.org/10.1016/j.thromres.2013.08.021

APA Citation style: Aslam, M., Sedding, D., Koshty, A., Santoso, S., Schulz, R., Hamm, C., & Guenduez, D. (2013). Nucleoside triphosphates inhibit ADP, collagen, and epinephrine-induced platelet aggregation: Role of P2Y₁ and P2Y₁₂ receptors.. Thrombosis Research: Vascular Obstruction, Hemorrhage and Hemostasis. 132(5), 548-557. https://doi.org/10.1016/j.thromres.2013.08.021