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Lymphocyte Subpopulations in Myocardial Infarction: a Comparison Between Peripheral and Intracoronary Blood

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Journal Springerplus
Date 2015 Dec 23
PMID 26693103
Citations 4
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Abstract

The frequency and profile of lymphocyte subsets within the culprit coronary artery were investigated in 33 patients with myocardial infarction and compared to their systemic circulating counterparts. T cell subsets including CD4(+)CD28null, activated and regulatory T-cells, TH1/TH2/TH17 phenotypes, NK and B-cells were studied in intracoronary (IC) and arterial peripheral blood (PB) samples. CD4(+)CD28null T-lymphocytes were significantly increased in IC compared to PB (3.7 vs. 2.9 %, p < 0.0001). Moreover, patients with more than 6 h of evolution of STEMI exhibited higher levels of CD4(+)CD28null T-cells suggesting that this subset may be associated with more intense myocardial damage. The rare NK subpopulation CD3(-)CD16(+)CD56(-) was also increased in IC samples (5.6 vs. 3.9 %, p = 0.006). CD4(+)CD28null T-cells and CD3(-)CD16(+)CD56(-) NK subpopulations were also associated with higher CK levels. Additionally, IFN-γ and IL10 were significantly higher in IC CD4(+) lymphocytes. Particular immune cell populations with a pro-inflammatory profile at the site of onset were increased relative to their circulating counterparts suggesting a pathophysiological role of these cells in plaque instability, thrombi and myocardial damage.

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