title: Endotoxin challenge causes a proinflammatory state in obstructive jaundice.
abstract: The aim of this study was to investigate the relationship between the obstructive jaundice-induced cellular immune suppression and endotoxin challenge with respect to the levels of tumor necrosis factor (TNF), interleukin-10 (IL-10), and interleukin-2 (IL-2). Rats underwent either bile duct ligation or sham operation. At 21 days, all rats were challenged either with lipopolysaccharide (LPS) or saline. In the sham-operated group LPS injection significantly increased TNF levels at 90 min. The common bile duct ligated group showed a significant increase in TNF levels compared with all other groups, including the sham-operated, LPS-injected group, at 90 min. At 180 min following LPS challenge, TNF levels decreased, and there was no difference between any of the LPS-challenged groups at 180 min and any of the saline groups at either 90 or 180 min. In the sham-operated group, LPS injection significantly increased IL-10 levels at both 90 and 180 min. In the bile duct ligated group, LPS injection significantly increased IL-10 levels compared with saline injection at both 90 and 180 min. On the other hand, bile duct ligated animals had significantly less increase in IL-10 levels following LPS challenge at 90 min but not at 180 min. In common bile duct ligated rats, LPS challenge induced a significantly greater increase in IL-2 levels compared with all other groups. In conclusion, in the presence of obstructive jaundice, endotoxemia primes a more vigorous inflammatory response despite cellular immune depression.
authors.affiliation: Departments of Surgery and Clinical Pathology, Faculty of Medicine, Hacettepe University, Ankara, Turkey. yorganci@hacettepe.edu.tr
authors.forename: Kaya
authors.initials: K
authors.lastname: Yorganci
authors.forename: Ataç
authors.initials: A
authors.lastname: Baykal
authors.forename: Murat
authors.initials: M
authors.lastname: Kologlu
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Saribaş
authors.forename: Gülsen
authors.initials: G
authors.lastname: Hascelik
authors.forename: Iskender
authors.initials: I
authors.lastname: Sayek
mesh_terms: D000818:Animals; D004731:Endotoxins / Q000276:immunology*; D005260:Female; D016753:Interleukin-10 / Q000097:blood / Q000276:immunology; D007376:Interleukin-2 / Q000097:blood / Q000276:immunology; D041781:Jaundice, Obstructive / Q000276:immunology*; D008297:Male; D023421:Models, Animal; D051381:Rats; D017208:Rats, Wistar; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis / Q000276:immunology
chemical_list: D004731:Endotoxins; D007376:Interleukin-2; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10