In the present study we investigated whether endothelial microparticles (EMPs) can bind to monocytic THP-1 cells and modulate their procoagulant properties. Using flow cytometry, we demonstrated that EMPs express adhesive receptors similar to those expressed by activated endothelial cells. Expression of endothelial antigens by THP-1 cells incubated with EMP was shown by immunoperoxidase stainin...

Periodontitis is a chronic inflammatory disease induced by bacteria. Exposure of the host to periodontal pathogens and their virulence factors induces a state of hyporesponsiveness to subsequent stimulations, which is termed endotoxin tolerance. The role and mechanism of lipopolysaccharide (LPS)-tolerized monocytes in inflammatory responses in neutrophils are currently unclear. Here, conditione...

Macrophage colony-stimulating factor (M-CSF) is required for the proliferation, differentiation, and activation of monocytes. High-affinity receptors for M-CSF are encoded by the c-fms proto-oncogene. In the present study, we show that c-fms transcripts are detectable in human THP-1 myeloid leukemia cells. Furthermore, radiolabeled 125I-M-CSF is rapidly internalized into THP-1 cells and then de...

The solubility of trihexyphenidyl (Thp) was improved by its combination with β-cyclodextrin (β-CD) and modified β-CDs. The solubility of Thp was found to be increased in the presence of β-CD, hydroxypropyl-β-cyclodextrin (HP-β-CD), methyl-β-cyclodextrin (Me-β-CD) and sulfobutylether-β-cyclodextrin (SBE-β-CD). In particular, the solubility of Thp in conjunction with SBE-β-CD was increased by a f...

The aim of this work was to analyze the effect of Interferon(IFN) and tumor necrosis factor(TNF) on NADPH oxidase activity and gp91-phox gene expression in human colostrum macrophages (CM), peripheral blood monocytes (PBM), and myelomonocytic THP-1 cells. We also investigated the effect of IFNon the release of TNFby these cells. Our results show that under basal culture conditions, CM release m...

Gouty arthritis is characterized by the deposition of monosodium urate (MSU) within synovial joints and tissues due to increased concentrations. Here, we elucidated role natural compound cichoric acid (CA) on MSU crystal-stimulated inflammatory response. The THP-1-derived macrophages (THP-Ms) were pretreated with CA then stimulated suspensions. protein levels p65 I?B?, activation NF-?B signalin...

Suspension cultures of a human monocytic leukemia cell line, THP-1, were treated with 0.16 to 160 nw 12-O-tetradecanoylphorbol-13-acetate (TPA). In an original cell line, THP1-O, cultured again from —80°cryopreservation, more than 80% of the cells adhered to the glass substrate with marked morphological change within 3 hr of TPA treatment. Adherent cells became flat and amoeboid in shape, an...

Suspension cultures of a human monocytic leukemia cell line, THP-1, were treated with 0.16 to 160 nw 12-O-tetradecanoylphorbol-13-acetate (TPA). In an original cell line, THP1-O, cultured again from —80°cryopreservation, more than 80% of the cells adhered to the glass substrate with marked morphological change within 3 hr of TPA treatment. Adherent cells became flat and amoeboid in shape, an...

AIM Angiotensin-converting enzyme inhibitors (ACEIs) have been shown to block matrix metalloproteinase (MMP)-9 activity, which plays a role in atherogenesis. MMP-9 activity of macrophages is increased during foam cell formation. To investigate the contribution of ACEIs to foam cell formation, we studied the effects of an ACEI, imidaprilat, on THP-1 macrophages and the underlying molecular mecha...