Propofol attenuates endotoxin-induced endothelial cell injury, angiotensin-converting enzyme shedding, and lung edema

E. Gina Votta-Velis, Richard D. Minshall, David J. Visintine, Maricela Castellon, Irina V. Balyasnikova*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

BACKGROUND: Acute lung injury (ALI) is a frequent complication in septic patients. Previously, we found that propofol, a highly lipid-soluble anesthetic, attenuates ischemia-reperfusion and oxidative lung injury in the isolated perfused rat lung. In the present study, we evaluated the effect of propofol on endotoxin-induced ALI and endothelial dysfunction. METHODS: The effect of propofol on endotoxin-induced lung endothelial injury was evaluated by plasma and lung tissue homogenate angiotensin I converting enzyme (ACE) activity, pulmonary vascular anti-ACE monoclonal antibody binding, and lung wet weight to body weight ratio (LW/BW). RESULTS: When injected IV into rats, endotoxin produced endothelial cell injury and lung edema, as indicated by: 1) an increase in plasma ACE activity, 2) a decrease in lung ACE activity and anti-ACE monoclonal antibody binding, and 3) an increase in LW/BW. Monoclonal antibody 1A2 was up to 1.8 times more sensitive than other anti-ACE monoclonal antibodies in detecting the decrease in ACE in lungs of endotoxin-treated rats. Pretreatment of rats with a bolus of propofol before endotoxin injection significantly inhibited the increase in ACE activity in the blood, the decrease in ACE activity in the lung, the decrease in anti-ACE monoclonal antibody binding in the lung, and the increase in LW/BW ratio. Importantly, propofol also significantly increased the survival rate of endotoxin-treated animals. The protective effect of propofol in endotoxin-treated animals in vivo was confirmed in vitro, i.e., propofol decreased endothelial cell injury and ACE shedding from endothelial cells in culture. CONCLUSIONS: These results suggest that propofol offers significant protection against endotoxin-induced pulmonary microvessel endothelial cell injury and that anti-ACE monoclonal antibody 1A2 is a sensitive probe for monitoring endothelial dysfunction and ALI during sepsis.

Original languageEnglish (US)
Pages (from-to)1363-1370
Number of pages8
JournalAnesthesia and analgesia
Volume105
Issue number5
DOIs
StatePublished - Nov 2007

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine

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