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- Title
Enprostil, a Prostaglandin-E<sub>2</sub> Analogue, Inhibits Interleukin-8 Production of Human Colonic Epithelial Cell Lines.
- Authors
Toshina, K.; Hirata, I.; Maemura, K.; Sasaki, S.; Murano, M.; Nitta, M.; Yamauchi, H.; Nishikawa, T.; Hamamoto, N.; Katsu, K.
- Abstract
We previously reported that intracolonic administration of enprostil, a prostaglandin-E2 (PGE2) analogue, had therapeutic effects on acute colitis induced in rodents by dextran sulfate sodium (DSS). In addition, production of growth-regulated gene product/cytokine-induced neutrophil chemoattractant-1 [GRO/CINC-1; an interleukin(IL)-8 like cytokine] was suppressed in the inflamed tissues. In the present study we used a human colon cancer cell line (HT-29) to investigate enprostil effects on the IL-8 production of intestinal epithelial cells stimulated by various stimulants. In a MTT assay, concentrations of enprostil >10-5M had cytotoxitic effects on HT-29 cells. Furthermore, 10-6 M enprostil suppressed IL-8 production in HT-29 cells, SW620 and CaCo2 stimulated with interleukin-1β (IL-1β) or lipopolysaccharide (LPS), but did not suppress this response when cells were stimulated with tumour necrosis factor (TNF)-α. These results suggest that enprostil affects a point in the pathway between the IL-1 receptor or LPS receptor and nuclear factor-κB(NF-κB), without affecting the pathway between the TNF receptor and NF-κB, with the latter factor being required for the IL-8 gene transcription. The therapeutic effect of exogenous enprostil on DSS colitis may involve the inhibition of IL-8 production in colonic epithelial cells stimulated by IL-1β or LPS.
- Subjects
COLITIS treatment; COLON cancer; CELL lines
- Publication
Scandinavian Journal of Immunology, 2000, Vol 52, Issue 6, p570
- ISSN
0300-9475
- Publication type
Article
- DOI
10.1046/j.1365-3083.2000.00815.x