Heterogeneous expression and release of CD14 by human gingival fibroblasts: characterization and CD14-mediated interleukin-8 secretion in response to lipopolysaccharide.

Human gingival CD14(+) fibroblasts primed with gamma interferon increase production of interleukin-8 in response to lipopolysaccharide through up-regulation of membrane CD14 and MyD88 mRNA expression.

Gamma interferon (IFN-gamma)-primed human gingival fibroblasts (HGF) have been shown to produce higher levels of interleukin-8 (IL-8) upon stimulation with bacterial products and inflammatory cytokines than nonprimed controls. In this study, we examined whether priming of HGF with IFN-gamma up-regulates IL-8 production by the cells in response to purified lipopolysaccharide (LPS). The priming e...

Soluble CD14 mediates lipopolysaccharide-induced intercellular adhesion molecule 1 expression in cultured human gingival fibroblasts.

Intercellular adhesion molecule 1 (ICAM-1) is involved in the accumulation and activation of leukocytes in inflammatory diseases such as periodontitis. As reported previously, ICAM-1 is up-regulated on cultured human gingival fibroblasts (HGF) by exposure to lipopolysaccharide (LPS), suggesting a specific LPS recognition mechanism. We therefore investigated the role of CD14, an LPS receptor, in...

Down-Regulation of CD14 Transcripts in Human Glioblastoma Cell Line U87 MG

Background: Pattern recognition receptors (PRRs) are the main sensors of pathogen and danger signals in innate immunity of which Toll Like Receptors (TLRs) are the most studied ones. The contribution of PRRs in cerebral inflammation induced by microbial infection, tissue damage and cancer has not extensively been addressed so far. Glioma is the most common tumor of the central nervous system an...

Lipopolysaccharide-Induced IL-8 Production Down-Regulation of Leukocyte Elastase Resulting in Neutrophils Is Mediated by Human Fibroblasts Cocultured with Activated Cleavage of CD14 on Human Gingival

LBP and CD14 secreted in tears by the lacrimal glands modulate the LPS response of corneal epithelial cells.

PURPOSE Lipopolysaccharide (LPS) is one of the most powerful bacterial virulence factors in terms of proinflammatory properties and is likely to contribute to corneal bacterial keratitis. Better understanding of the spatial expression of the LPS receptor components at the tear-corneal interface might facilitate enhanced functions of the LPS receptor complex in ocular defense against Gram-negati...