title: Serum profiles of interleukin-18 in different severity forms of human acute pancreatitis.
abstract: BACKGROUND
  Interleukin 18 (IL-18) is a new mediator and modulator of the immune response; its role in acute pancreatitis (AP), however, has not yet been fully explained. The aim of our study was to evaluate the profile IL-18 serum concentrations in the course of acute pancreatitis.
  
  
  METHODS
  The prospective study involves 30 patients with AP (n = 15 with mild AP and n = 15 with severe AP) as well as 10 healthy subjects. AP severity was defined according to Ranson's and Balthazar's criteria, supplemented by serum CRP concentration measurements. In the course of hospitalization, 2 patients with severe AP died. Serum IL-18 and plasma polymorphonuclear leukocyte elastase (PMN-E) concentrations were measured at admission (day 1) and on days 2, 3, 5 and 10.
  
  
  RESULTS
  In both the mild and the severe forms of AP, serum IL-18 concentration was significantly higher than in the healthy controls. In severe AP, serum IL-18 reached the highest levels in all observed periods compared to that in patients with mild AP. Significant correlations, calculated for day 1, were found between serum IL-18 and plasma PMN-E (Rs = 0.514. P < 0.001) and between IL-18 and CRP (Rs = 0.463, P < 0.001) levels.
  
  
  CONCLUSIONS
  Serum profile IL-18 during AP indicates that this cytokine was released early after AP onset and may play the key role in inflammatory and immune response. Positive correlation between serum IL-18 and commonly known early prognostic markers of AP severity suggest that serum IL-18 concentrations may represent another early marker indicating severe course of AP.
authors.affiliation: Dept of Gastroenterology, Medical Academy of Bialystok, Poland. uwersien@amb.edu.pl
authors.forename: U
authors.initials: U
authors.lastname: Wereszczynska-Siemiatkowska
authors.forename: B
authors.initials: B
authors.lastname: Mroczko
authors.forename: A
authors.initials: A
authors.lastname: Siemiatkowski
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002097:C-Reactive Protein / Q000032:analysis; D005260:Female; D006801:Humans; D020382:Interleukin-18 / Q000097:blood*; D019272:Leukocyte Elastase / Q000097:blood; D008297:Male; D008875:Middle Aged; D018375:Neutrophil Activation; D010195:Pancreatitis / Q000097:blood* / Q000145:classification; D011379:Prognosis; D011446:Prospective Studies
chemical_list: D020382:Interleukin-18; D002097:C-Reactive Protein; D019272:Leukocyte Elastase