Endothelial cells possess constitutive or inducible cyclo-oxygenase (COX) isoenzymes for prostacyclin production, but the mechanisms for their expression are largely unknown. We found that vanadate, an inhibitor of protein-tyrosine phosphatases, induced the expression of two COX isoenzyme mRNAs in human umbilical vein endothelial cells (HUVEC) in a time- and dose-dependent manner. Vanadate also...

In this paper, we demonstrate formation of size-controlled 3-dimensional hetero-spheroids using a micro-fluidic device in approximately 2 min. The device collects cells in the center of a micro-chamber using micro-rotational flow as shown in Fig. 1. In previous work, we used this device to generate size-controlled HepG2 spheroids [1]. We applied it to form heterospheroids consisting of HepG2 an...

A fundamental feature of inflammation includes angiogenesis, adhesion of leukocytes to vascular endothelium, and entry of leukocytes into inflamed tissues. Recent studies have suggested that angiogenesis and cellular adhesion may be mutually linked processes. Both basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF) have been shown to facilitate angiogenesis. Howe...

In recent studies we have shown that the expression of stem cell factor (SCF) in human endothelial cells is regulated by inflammatory processes. Gram-negative bacteria, interleukin-1 (IL-1), and lipopolysaccharide were able to upregulate the expression of SCF in human umbilical vein endothelial cells (HUVEC) (Blood 83:2836, 1994). Interestingly enough c-kit, the receptor of SCF, is coexpressed ...

Since human endothelial cells synthesize Factor V but do not secrete it into the medium, we studied the effects of cell injury on the availability of Factor V at the surface of these cells. Human umbilical vein endothelial cells (HUVEC), grown to confluency and incubated with human 125I Factor Va, specifically bound 5000 to 7000 molecules per cell. In the absence of added Va, no antigen was det...

Infection of humans with Shiga toxin-producing Escherichia coli O157:H7 and Shigella dysenteriae 1 is strongly associated with vascular endothelial cell damage and the development of hemolytic-uremic syndrome. The cytotoxic effect of Shiga toxins on vascular endothelial cells in vitro is enhanced by prior exposure to bacterial lipopolysaccharide (LPS) or either of the host cytokines tumor necro...

Whereas insulin-like growth factor binding protein-3 (IGFBP-3) is frequently upregulated in senescent replicatively exhausted human umbilical vein endothelial cells (HUVEC), a systematic analysis of four different HUVEC donors revealed that IGFBP-3 is not consistently upregulated in all isolates at senescence. Lentiviral overexpression of IGFBP-3 inhibited cell proliferation, induced apoptosis ...

Advanced glycation end products (AGEs) have been regarded as a pivotal inducer in diabetes and kinds of diabetic nephropathy. The present studies explored the effects of Danggui Buxue Tang (DBT) that is a Chinese medicinal decoction on negative charge to Human Umbilical Vein Endothelial Cell (HUVEC) and the related mechanism. Alcian blue staining was established to evaluate the intensity of neg...

Neutrophil adhesion to interleukin-1 (IL-1)-stimulated human umbilical vein endothelial cells (HUVEC) involves the CD18 family of leukocyte integrins (lymphocyte function-associated antigen-1 [LFA-11, Mac-1, and ~150.95) and LECAM-1 (DREG-56/LEU-8/LAM-l antigen) on neutrophils and intercellular adhesion molecule-l (ICAM-l) and endothelial leukocyte adhesion molecule-1 (ELAM-1) on the endotheliu...