OBJECTIVE Lymphocyte activation is thought to play a major role in the pathogenesis of atherosclerotic complications such as plaque thrombosis. Circulating CD31+ T cells have been shown to regulate human T cell activation. Aim of this study was to evaluate whether the proportion of circulating immunoregulatory CD31+ T cells is correlated to the occurrence of plaque thrombosis in aged apolipopro...

Objectives We have reported recently that JIA patients carry high numbers of unusual senescent CD8 T cells bearing CD31, a molecule known mediate leukocyte diapedesis into sites of injury. In the present work, we re-surveyed the T cell populations of patients for other CD31 senescent T cell subsets. We hypothesized that CD31 signaling in these senescent cells is a self-perpetuating mechanism fo...

AIMS The implication of circulating haematopoietic CD34(+) progenitors in the vasculature is unclear due to the lack of understanding of their characteristics and plasticity mediated by their cellular microenvironment. We investigated how vascular smooth muscle cells (SMCs) and their interactions with endothelial cells (ECs) affect the behaviour and plasticity of CD34(+)CD31(+) progenitors and ...

UNLABELLED The aim of our study was to compare the CD31 and CD105 endothelial area (EA) by computer-assisted morphometrical analysis in colorectal carcinomas (CRC). Two hundred and eleven surgical specimens with CRC were immunohistochemical analyzed with markers for angiogenesis CD31 and CD105 (Endoglin). We determined the area of endothelial cells occupied in the microscope field (EA). RESUL...

Highlights . Spontaneous endothelial-to-mesenchymal transition of primary human umbilical vein endothelial cells (HUVEC) is characterized by an acquired expression SNAI2 and TWIST1 genes, loss markers transcription factors (CD31/PECAM1, VE-cadherin, ERG factor), pronounced S100A4 ACTA2 active production type I collagen, a major component the extracellular matrix. An optimal algorithm to detect ...

Cardiac resident stem/progenitor cells (CSC/CPCs) are critical to the cellular and functional integrity of the heart because they maintain myocardial cell homeostasis. Several populations of CSC/CPCs have been identified based on expression of different stem cell-associated antigens. Sca-1(+) cells in the cardiac tissue may be the most common CSC/CPCs. However, they are a heterogeneous cell pop...

Soluble forms of membrane receptors are emerging candidates as physiological regulators of leukocyte trafficking. In the present study, we found that the soluble form of the CD38 antigen (sCD38) bears a binding domain of low affinity for a cellular receptor on U937 cells. Cross-linking and peptide-mapping studies confirmed the physical association and the identification of the U937 receptor as ...

Constitutive resistance to cell death induced by inflammatory stimuli activating the extrinsic pathway of apoptosis is a key feature of vascular endothelial cells (ECs). Although this property is central to the maintenance of the endothelial barrier during inflammation, the molecular mechanisms of EC protection from cell-extrinsic, proapoptotic stimuli have not been investigated. We show that t...