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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

Published on: May 23, 2025

Protein kinase C ε expression in platelets from patients with acute myocardial infarction

Cecilia Carubbi1, Prisco Mirandola, Maria Mattioli

  • 1Department of Biomedical, Biotechnological and Translational Sciences, University of Parma, Parma, Italy.

Plos One
|October 17, 2012
PubMed

Insights

Platelets from myocardial infarction patients ectopically express Protein Kinase C ε (PKCε). This finding suggests a role for PKCε in myocardial infarction pathophysiology, as its presence enhanced platelet activation and adhesion.

Area of Science:

  • Cardiovascular Biology
  • Hematology
  • Molecular Medicine

Background:

  • Platelets are central to thrombosis and myocardial infarction (MI) pathophysiology.
  • Protein Kinase C ε (PKCε) is typically absent in human platelets and its expression is tightly regulated during megakaryocyte differentiation.

Purpose of the Study:

  • To investigate the hypothesis that platelets from MI patients ectopically express PKCε.
  • To determine the potential pathophysiological role of ectopic PKCε in MI.

Main Methods:

  • Studied platelet PKCε expression in 24 MI patients, 24 stable coronary artery disease patients, and 24 healthy subjects.
  • Analyzed PKCε expression during patient follow-up.
  • Forced expression of PKCε in normal donor platelets to assess functional impact.

Main Results:

  • Platelets from MI patients showed significantly higher PKCε expression compared to controls.
  • PKCε expression returned to negative levels during patient follow-up.
  • Forced PKCε expression in normal platelets increased ADP-induced activation and collagen adhesion.

Conclusions:

  • Platelet PKCε-mRNA may be retained without down-regulation during terminal megakaryocyte differentiation before an acute MI event.
  • Peri-infarctual megakaryocytopoiesis is proposed as a critical factor in MI pathophysiology.
Abstract

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