Effects of a perfluorochemical emulsion on the fate of circulating Pseudomonas aeruginosa

Joseph D. Brain*, Ramon M. Molina, Malcolm M. DeCamp, Angeline E. Warner

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Because mononuclear phagocytes take up perfluorochemical emulsions (PFCE), we examined how prior treatment with PFCE affects the fate of circulating bacteria. Rats were preinjected with three daily intravenous injections of PFCE (2.0 ml/100 g) containing 12.5% (vol/vol) of a 4:1 mixture of F-dimethyl adamantane and F-trimethylbicyclo-nonane, 2.5% (wt/vol) Pluronic F-68 as the emulsifying agent, and 3% (wt/vol) hydroxyethyl starch as the oncotic agent. Pseudomonas aeruginosa or Staphylococcus aureus were injected 4 h after the third PFCE injection. PFCE pretreatment decreased the rate and extent of vascular clearance of P. aeruginosa, with decreased uptake by the liver. Importantly, there were significant decreases in killing of P. aeruginosa in the liver, lungs, spleen, and kidneys of PFCE animals. PFCE did not alter the clearance of S. aureus from the circulation. However, hepatic uptake was reduced, with concomitant increases in lung and kidney uptake. Ultrastructure of Kupffer cells revealed PFCE inclusions and extensive vacuolization. These experiments demonstrate that the clearance kinetics and organ distribution of circulating P. aeruginosa and their subsequent killing are altered by PFCE. Diminished hepatic phagocyte function leads to a decrease in vascular clearance of circulating bacteria, increased uptake in other reticuloendothelial organs, and decreased bactericidal activity versus P. aeruginosa.

Original languageEnglish (US)
Pages (from-to)L1037-L1045
JournalAmerican Journal of Physiology - Lung Cellular and Molecular Physiology
Volume276
Issue number6 20-6
DOIs
StatePublished - Jun 1999

Keywords

  • Liver
  • Lung injury
  • Macrophage

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine
  • Physiology (medical)
  • Cell Biology

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