Acute coronary syndromes are associated with a reduction of VLA-1+ peripheral blood T cells and their enrichment in coronary artery plaque aspirates.
Immunobiology
; 219(4): 302-7, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-24331530
ABSTRACT
Memory T cells producing interferon (IFN)γ and expressing very late antigen-1 (VLA-1) integrin collagen receptors are found in carotid atherosclerotic plaques, suggesting their involvement in coronary artery disease (CAD) as well. To determine the role of VLA-1+ T cells in CAD percent of CD3+ T cells binding monoclonal antibodies (mAb) to VLA-1 in peripheral blood (PB), and in coronary plaque material aspirated during coronary arterography and arterial blood, were analyzed in a cohort of 117 patients with CAD and 34 controls without CAD. % VLA-1+ T cells in PB was 0.63 ± 0.09% in controls compared to 0.96 ± 0.95% in patients with CAD (p<0.009). The increase was due to a marked elevation of % VLA-1+ T cells in stable CAD (1.6 ± 0.27%) whereas % VLA-1+ T cells during acute coronary syndromes (ACS) and in patients with ischemia by thalium SPECT scan had significantly lower levels. % VLA-1+ T cells in coronary artery plaque material aspirated during therapeutic angiography in patients with ACS was significantly higher than in arterial blood (1.39 ± 0.96% vs 0.75 ± 0.84%, p<0.035, n=3). Thus, % VLA-1+ T cells increases in the PB during stable CAD but decreases in ACS. The finding of their enrichment in coronary blood containing atherosclerotic plaque aspirates suggests that a shift of VLA-1+ T cells from blood to atherosclerotic plaques may play a role in plaque instability in patients with ACS.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Circulação Sanguínea
/
Linfócitos T
/
Vasos Coronários
/
Síndrome Coronariana Aguda
/
Placa Aterosclerótica
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article