Abstract
The frequency and function of T cells, monocytes, and dendritic cell subsets were investigated in 12 patients after acute myocardial infarction (AMI)—(T0), 1 month after the episode (T1), and in 12 healthy individuals (HG). The cell characterization and the functional studies were performed by flow cytometry and by RT-PCR, after cell sorting. The most important findings at T0 moment, when compared with T1 and HG, were: a decrease in the frequency of IL-2-producing T cells; a lower frequency of TNF-α- and IL-6-producing monocytes, myeloid dendritic cells, and CD14−/lowCD16+DCs; and a lower TNF-α mRNA expression, after sorting these cells. Moreover, the regulatory function of Treg cells, at T0 moment, was upregulated, based on the FoxP3, CTLA-4, and TGF-β mRNA expression increase. The majority of these phenotypic and functional alterations disappeared at T1. Our data demonstrate that AMI induces a significant change in the immune system homeostasis.
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Acknowledgments
The authors would like to thank Letícia Nunes, Diana Ferreira, Filipe Vilela, Liliana Oliveira, and Sofia Pereira from the Superior School of Health Technology of Coimbra for their contribution on sample processing.
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The study protocol was approved by the local ethics committee. All participants gave and signed informed consent, and the principles of the Helsinki Declaration were respected.
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Carvalheiro, T., Velada, I., Valado, A. et al. Phenotypic and Functional Alterations on Inflammatory Peripheral Blood Cells After Acute Myocardial Infarction. J. of Cardiovasc. Trans. Res. 5, 309–320 (2012). https://doi.org/10.1007/s12265-012-9365-8
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DOI: https://doi.org/10.1007/s12265-012-9365-8