title: Neutrophil margination and extravasation in sinusoids and venules of liver during endotoxin-induced injury.
abstract: Neutrophils contribute to liver damage during endotoxin shock. The objective of this investigation was to document where neutrophils localize in the hepatic vasculature and whether they migrate out of sinusoids or postsinusoidal venules. A well-characterized model of galactosamine and endotoxin shock and immunostaining for neutrophil-associated migration inhibition factor-related protein complex 8/14 S100 calcium-binding proteins were used. Treatment of C3Heb/FeJ mice with 100 micrograms/kg Salmonella abortus equi endotoxin alone or in combination with 700 mg/kg galactosamine induced a time-dependent increase of neutrophil margination in sinusoids and postsinusoidal venules at 4 h. The number of venular neutrophils decreased in both groups at later time points without evidence for transmigration. Extravasation of neutrophils was only observed from sinusoids in galactosamine plus endotoxin-treated animals between 4 and 7 h, which correlated with parenchymal cell injury. After endotoxin alone, large numbers of neutrophils remained sequestered in sinusoids without injury. These data suggest that neutrophils cause hepatocellular injury during endotoxemia after extravasation and are less likely to cause damage when sequestered in the vasculature. In the liver, neutrophils migrate out of sinusoids and not out of postsinusoidal venules.
authors.affiliation: Pharmacia and Upjohn, Inc., Kalamazoo, Michigan 49007, USA.
authors.forename: J G
authors.initials: JG
authors.lastname: Chosay
authors.forename: N A
authors.initials: NA
authors.lastname: Essani
authors.forename: C J
authors.initials: CJ
authors.lastname: Dunn
authors.forename: H
authors.initials: H
authors.lastname: Jaeschke
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000378:metabolism; D002135:Calcium-Binding Proteins / Q000378:metabolism; D040501:Calgranulin A; D040502:Calgranulin B; D002465:Cell Movement; D004338:Drug Combinations; D004731:Endotoxins / Q000494:pharmacology*; D005688:Galactosamine / Q000494:pharmacology; D007158:Immunologic Techniques; D008099:Liver / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology*; D008102:Liver Circulation; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D009504:Neutrophils / Q000502:physiology*; D013194:Staining and Labeling; D014699:Venules / Q000473:pathology
chemical_list: D000943:Antigens, Differentiation; D002135:Calcium-Binding Proteins; D040501:Calgranulin A; D040502:Calgranulin B; D004338:Drug Combinations; D004731:Endotoxins; D005688:Galactosamine