Platelet reactivity and endothelial function in children of patients with early acute myocardial infarction

Gaetano A. Lanza, Giancarla Scalone, Lucy Barone, Fabio Infusino, Ilaria Coviello, Antonio Di Monaco, Angelica Delogu, Irma Battipaglia, Alessia De Nisco, Alfonso Sestito, Costantino Romagnoli, Filippo Crea

Research output: Contribution to journalArticlepeer-review


AimsTo assess whether platelet reactivity is increased in offspring of patients with early acute myocardial infarction (AMI) and its possible relation with endothelial dysfunction.Methods and resultsWe studied 23 healthy children (15 ± 3 years, 13 males) of patients with early AMI (≤50 years old; Group 1) and 21 healthy children of healthy subjects without any history of cardiovascular disease (14 ± 3 years, 10 males; Group 2). Platelet reactivity was assessed by flow cytometry as the increase in monocyte-platelet aggregates (MPA) and CD41 and PAC-1 platelet expression in response to exercise stress test (EST), adenosine diphosphate (ADP) stimulation (10 -7 M), or both. Endothelial function was assessed by measuring brachial artery dilation during post-ischaemic forearm hyperaemia [flow-mediated dilation (FMD)]. Both EST and ADP induced a higher percentage increase in platelet receptor expression in Group 1, compared with Group 2, with the most significant difference being shown for the response to the combined stimuli (e.g. MPA, 23.1 ± 12 vs. 5.63 ± 8, P <0.001; platelet PAC-1, 57.7 ± 47 vs. 13.2 ± 7, P <0.001). Compared with Group 2, Group 1 children showed lower FMD (10.7 ± 3.1 vs. 8.0 ± 2.9, respectively; P 0.007). However, no significant association was found between FMD and platelet reactivity. ConclusionOur results show increased platelet reactivity in children of patients with early AMI; the finding was not significantly correlated with endothelial dysfunction, suggesting that other mechanisms are mainly involved in the enhanced platelet response to agonistic stimuli.

Original languageEnglish
Pages (from-to)2042-2049
Number of pages8
JournalEuropean Heart Journal
Issue number16
Publication statusPublished - Aug 2011


  • Endothelial dysfunction
  • Family history of acute myocardial infarction
  • Platelet aggregation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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