title: Induction of procalcitonin and proinflammatory cytokines in an anhepatic baboon endotoxin shock model.
abstract: Our objective was to evaluate the role of the liver for procalcitonin (PCT) and cytokine induction in a baboon endotoxin shock model. Complete liver resection with portocaval anastomosis was established in a baboon prior to the induction of endotoxin shock by intravenous administration of endotoxin (100 microg/kg LPS Escherichia coli). Two baboons without surgical intervention were used as controls. Plasma concentrations of PCT, tumor necrosis factor (TNF)-alpha, interleukin (IL) 6, IL-8, endotoxin, and hemodynamic and metabolic parameters were measured pre- and postoperatively and until 6 h after endotoxin administration. PCT concentrations increased to 1.2 and 4.6 ng/mL in control animals at 6 h, but remained below 0.3 ng/mL in the anhepatic baboon. IL-6 and IL-8 increased only for few hours in controls, but remained elevated in the hepatectomized animal near their maximum (IL-6, 2-6 ng/mL) or several-fold higher (IL-8, 30-35 ng/mL), whereas TNF-alpha response was only a small fraction (0.3 ng/mL) of the controls. Endotoxin was much higher and longer persisting in the hepatectomized animal compared with controls. The near absence of PCT production in the anhepatic baboon suggests a primary role for the liver as a source of PCT production during endotoxin shock. Furthermore, the liver also seems to be an important source of TNF-alpha, but not IL-6 or IL-8.
authors.affiliation: Department of Anesthesiology, University of Jena, D-07743 Jena, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Meisner
authors.forename: Volker
authors.initials: V
authors.lastname: Müller
authors.forename: Zafar
authors.initials: Z
authors.lastname: Khakpour
authors.forename: Eva
authors.initials: E
authors.lastname: Toegel
authors.forename: Heinz
authors.initials: H
authors.lastname: Redl
mesh_terms: D000818:Animals; D002116:Calcitonin / Q000096:biosynthesis*; D016207:Cytokines / Q000096:biosynthesis*; D004731:Endotoxins / Q000097:blood / Q000493:pharmacokinetics*; D015850:Interleukin-6 / Q000096:biosynthesis; D016209:Interleukin-8 / Q000096:biosynthesis; D008099:Liver / Q000378:metabolism*; D008297:Male; D010215:Papio; D011498:Protein Precursors / Q000096:biosynthesis*; D012769:Shock; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis / Q000378:metabolism
chemical_list: D016207:Cytokines; D004731:Endotoxins; D015850:Interleukin-6; D016209:Interleukin-8; D011498:Protein Precursors; D014409:Tumor Necrosis Factor-alpha; D002116:Calcitonin