Polarised interleukin 8 secretion by HT 29/19A cells.

Polarised interleukin 8 secretion by HT 29/19A cells.

Interleukin 8 is a neutrophil chemotactic and stimulating cytokine induced by various inflammatory stimuli, including tumour necrosis factor, interleukin 1, and endotoxin. The ability of HT 29/19A enterocytes to synthesise interleukin 8 was studied. The results show that interleukin 1 is an important stimulus for interleukin 8 synthesis and secretion by HT 29/19A cells, being more potent than t...

Campylobacter jejuni-stimulated secretion of interleukin-8 by INT407 cells.

Incubation of INT407 cells with various clinical isolates of Campylobacter jejuni resulted in secretion of interleukin-8 (IL-8) at levels ranging from 96 to 554 pg/ml at 24 h. The strains which produced the highest levels of IL-8 secretion were 81-176 and BT44. Induction of IL-8 secretion required live cells of 81-176 and was dependent on de novo protein synthesis. Site-specific mutants of 81-1...

Histamine induces interleukin-8 secretion by endothelial cells.

It has been shown that histamine induces early changes on endothelial cells (EC), such as a transient expression of P-selectin and secretion and/or surface expression of early mediators (eg, prostacyclin [PG1(2)], platelet-activating factor [PAF], and leukotriene B4 [LTB4]). However, delayed effects of histamine on EC and particularly on cytokine production are undefined. In this study, the eff...

Interleukin-1 induces interleukin-8 secretion from endothelial cells by a juxtacrine mechanism.

Inflammation is characterized by migration of neutrophils through the endothelium, and the chemokine interleukin-8 (IL-8) appears to be involved. We asked whether adherence of cells bearing a membrane-form of interleukin 1 (IL-1) induces IL-8 secretion from human umbilical vein endothelial cells (HUVEC) and fibroblasts. Human peripheral blood mononuclear cells (PBMC) were stimulated with endoto...

Down-Regulation of Interleukin-8 Secretion