title: Acute phase response to Salmonella in a pig liver perfusion model.
abstract: Livers from 7- to 14-day old pigs were maintained on a perfusion apparatus for 3 h. The perfused livers maintained physiologic and immunologic functions during perfusion. The perfused livers retained 78-94% of a non-recirculating inoculum of approximately 1-5 x 10(8) Salmonella choleraesuis (Scs), and cleared 94.9 +/- 1.7% of the retained (Scs) during the 3-h perfusion period. When the acute phase response (APR) was induced in liver donor pigs 24 h before liver perfusion, the perfused livers had diminished capability to retain, and greatly diminished capability to clear Scs. When sterile, filtered, and concentrated liver perfusate (LP) from previous, LPS-perfused livers was added to the perfusion fluid (PF) at 50 min of Scs perfusion (passive APR), Scs clearance was inhibited. When sterile, filtered LP from previously Scs perfused livers was added to the system, liver clearance was abolished, and Scs always grew in such livers during the 3 h perfusion period. The LP of livers perfused with Scs enhanced growth of Scs in an in vitro assay. These observations suggest that products of the acute phase response favor growth of Scs in vitro and in vivo.
authors.affiliation: Veterinary Medical Research Institute, Iowa State University, College of Veterinary Medicine, Ames 50011.
authors.forename: T T
authors.initials: TT
authors.lastname: Kramer
authors.forename: F A
authors.initials: FA
authors.lastname: Ahrens
authors.forename: D
authors.initials: D
authors.lastname: Frank
mesh_terms: D000210:Acute-Phase Reaction / Q000276:immunology / Q000382:microbiology / Q000662:veterinary*; D000818:Animals; D004195:Disease Models, Animal; D015850:Interleukin-6 / Q000276:immunology; D008099:Liver / Q000382:microbiology*; D010477:Perfusion; D012475:Salmonella / Q000254:growth & development / Q000276:immunology; D012481:Salmonella Infections, Animal / Q000276:immunology*; D013552:Swine; D013553:Swine Diseases / Q000276:immunology* / Q000382:microbiology; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology
chemical_list: D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha