Protein Kinase C ε Expression in Platelets from Patients with Acute Myocardial Infarction

Cecilia Carubbi, Prisco Mirandola, Maria Mattioli, Daniela Galli, Nicola Marziliano, Piera Angelica Merlini, Daniela Lina, Francesca Notarangelo, Maria Rita Cozzi, Marco Gesi, Diego Ardissino, Luigi De Marco, Marco Vitale, Giuliana Gobbi

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: Platelets play crucial roles in the pathophysiology of thrombosis and myocardial infarction. Protein kinase C ε (PKCε) is virtually absent in human platelets and its expression is precisely regulated during human megakaryocytic differentiation. On the basis of what is known on the role of platelet PKCε in other species, we hypothesized that platelets from myocardial infarction patients might ectopically express PKCε with a pathophysiological role in the disease. Methods and Results: We therefore studied platelet PKCε expression from 24 patients with myocardial infarction, 24 patients with stable coronary artery disease and 24 healthy subjects. Indeed, platelets from myocardial infarction patients expressed PKCε with a significant frequency as compared to both stable coronary artery disease and healthy subjects. PKCε returned negative during patient follow-up. The forced expression of PKCε in normal donor platelets significantly increased their response to adenosine diphosphate-induced activation and adhesion to subendothelial collagen. Conclusions: Our data suggest that platelet generations produced before the acute event retain PKCε-mRNA that is not down-regulated during terminal megakaryocyte differentiation. Results are discussed in the perspective of peri-infarctual megakaryocytopoiesis as a critical component of myocardial infarction pathophysiology.

Original languageEnglish
Article numbere46409
JournalPLoS One
Volume7
Issue number10
DOIs
Publication statusPublished - Oct 5 2012

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

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