Pseudomonas aeruginosa and the hyperlipidaemia of sepsis

Rajkumar Cheluvappa, Gerene M. Denning, Gee Lau, Michael C. Grimm, Sarah N. Hilmer, David G. Le Couteur

Research output: Contribution to journalArticle

Abstract

Pathophysiological alterations of liver sinusoidal endothelial cells (LSECs) impact liver and metabolism. LSEC fenestrations are pores facilitating lipoproteins and macromolecule transfer between blood and hepatocytes. The Gram negative bacterium Pseudomonas aeruginosa is one of the most common opportunistic nosocomial pathogens, especially in post-liver transplant recipients. Gram negative bacterial endotoxin (lipopolysaccharide, LPS) and the P. aeruginosa toxin, pyocyanin, have marked effects on LSECs, including loss of porosity (defenestration). Currently proposed mechanisms for sepsis-hyperlipidaemia, an important response to Gram negative bacterial sepsis, include tissue lipoprotein-lipase inhibition and increased hepatic triglyceride production. Owing to the well-substantiated role of LSECs in liver-allograft rejection and hyperlipidaemia, we propose defenestration of the LSEC is an additional cellular mechanism for sepsis-hyperlipidaemia, including pseudomonal sepsis post-liver transplantation.

Original languageEnglish (US)
Pages (from-to)615-621
Number of pages7
JournalPathology
Volume41
Issue number7
DOIs
StatePublished - Dec 2009

Keywords

  • Fenestration
  • Hyperlipidaemia
  • Liver sinusoidal endothelial cell
  • Oxidative stress
  • Pseudomonas aeruginosa
  • Pyocyanin
  • Sepsis
  • Transplantation

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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    Cheluvappa, R., Denning, G. M., Lau, G., Grimm, M. C., Hilmer, S. N., & Le Couteur, D. G. (2009). Pseudomonas aeruginosa and the hyperlipidaemia of sepsis. Pathology, 41(7), 615-621. https://doi.org/10.3109/00313020903257764