title: Lipopolysaccharide and silica-stimulated mononuclear cell prostaglandin production in ulcerative colitis.
abstract: Basal, lipopolysaccharide (LPS) and silica-stimulated prostaglandin (PG) production were compared between peripheral blood mononuclear cells (PBMNC) from UC patients and healthy subjects (HS). Basal and LPS-stimulated PBMNC PGI2, but not PGE2, production was greater in UC. LPS stimulated both PGE2 and PGI2 by PBMNC from HS and UC patients. Silica stimulated production of both PGs by cells from HS but only PGE2 by cells from UC patients. The differences in responses to silica and LPS may result from differences in activation of NFkappaB or, alternatively, prior sensitisation to one of these agents. That PBMNC PGE2 production is not increased in UC, as it is in Crohn's disease, suggests that there are differences in PBMNC behaviour between these two diseases.
authors.affiliation: Department of Biology and Health Science, Faculty of Science, Technology & Design, University of Luton, UK. Neville.Punchard@luton.ac.uk
authors.forename: N A
authors.initials: NA
authors.lastname: Punchard
authors.forename: J
authors.initials: J
authors.lastname: Cason
authors.forename: J
authors.initials: J
authors.lastname: Mullins
authors.forename: C
authors.initials: C
authors.lastname: Chander
authors.forename: R P
authors.initials: RP
authors.lastname: Thompson
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D003093:Colitis, Ulcerative / Q000378:metabolism*; D015232:Dinoprostone / Q000096:biosynthesis; D011464:Epoprostenol / Q000096:biosynthesis; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D011453:Prostaglandins / Q000096:biosynthesis*; D012822:Silicon Dioxide / Q000494:pharmacology
chemical_list: D008070:Lipopolysaccharides; D011453:Prostaglandins; D012822:Silicon Dioxide; D011464:Epoprostenol; D015232:Dinoprostone