Vitamin E potentiates the antiplatelet activity of aspirin in collagen-stimulated platelets

Andrea Celestini, Fabio M. Pulcinelli, Pasquale Pignatelli, Luisa Lenti, Giacomo Frati, Pier Paolo Gazzaniga, Francesco Violi

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Abstract

Background and Objectives. The combination of vitamin E with aspirin is becoming an attractive therapeutic approach to prevent thrombotic vascular accidents. In this study we investigated the capacity of vitamin E (50 and 100 μM) to enhance the antiplatelet effect of aspirin. Design and Methods. The dose-response curves of platelet aggregation, dense body secretion, phospholipase C activation and calcium mobilization were measured in aspirin-treated platelets with and without added vitamin E (50 and 100 μM). The role of vitamin E in reducing platelet adhesion to collagen was also studied. Results. We demonstrated that, in platelets incubated with 100 μM vitamin E, collagen-concentration (μg/mL) able to induce 50% of the maximal platelet aggregation and of the calcium mobilization was higher than in controls (11.6 versus 3.8 and 21.3 versus 9.8, respectively). Furthermore, 50 μM vitamin E reduced platelet adhesion to collagen by about 80%. Interpretation and Conclusions. These data demonstrate that vitamin E can potentiate the antiplatelet activity of aspirin by inhibiting the early events of platelet activation pathways induced by collagen. This finding provides a rationale for combining aspirin and vitamin E to prevent thrombotic complications in atherosclerotic patients.

Original languageEnglish
Pages (from-to)420-426
Number of pages7
JournalHaematologica
Volume87
Issue number4
Publication statusPublished - 2002

Keywords

  • Aspirin
  • Collagen
  • Phospholipase C
  • Platelets
  • Vitamin E

ASJC Scopus subject areas

  • Hematology

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    Celestini, A., Pulcinelli, F. M., Pignatelli, P., Lenti, L., Frati, G., Gazzaniga, P. P., & Violi, F. (2002). Vitamin E potentiates the antiplatelet activity of aspirin in collagen-stimulated platelets. Haematologica, 87(4), 420-426.