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Related Experiment Videos

Deferoxamine induces hypotension in experimental gram-negative septicemia

R A Mustard1, J M Bohnen, J B Mullen

  • 1Department of Surgery and Anesthesia, Wellesley Hospital, Toronto, Ontario, Canada.

Shock (Augusta, Ga.)
|March 1, 1994
PubMed
Summary

Iron chelation with deferoxamine (DFO) did not prevent lung damage in septic swine. Instead, DFO worsened cardiovascular function, leading to severe hypotension and mortality in this animal model.

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Area of Science:

  • Medical research
  • Animal models
  • Septicemia research

Background:

  • Tissue damage in sepsis can lead to multiple organ system failure.
  • Oxygen-free radical-induced peroxidation, requiring iron, contributes significantly to this damage.
  • Iron chelation has shown potential in preventing tissue damage in some experimental models.

Purpose of the Study:

  • To investigate the efficacy of iron chelation using deferoxamine (DFO) in preventing lung damage.
  • To assess the impact of DFO on cardiovascular and respiratory function in a swine model of Gram-negative septicemia.

Main Methods:

  • Fifteen swine were divided into three groups: control, septic (Pseudomonas aeruginosa infusion), and septic-treated (Pseudomonas infusion with DFO pretreatment).
  • Cardiovascular parameters (mean arterial pressure) and respiratory function (pO2) were monitored.

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  • Lung morphology was assessed.

    • Main Results:

    • Three of six septic-treated animals experienced severe hypotension and died, unlike the septic group.
    • Surviving septic-treated animals exhibited significantly lower mean arterial pressure compared to septic and control groups.
    • DFO treatment did not improve respiratory function or lung morphology in septic animals.

    Conclusions:

    • Iron chelation therapy with deferoxamine at the tested dosage deteriorates cardiovascular function in septic swine.
    • DFO did not prevent lung damage in this Gram-negative septicemia model.
    • Deferoxamine pretreatment exacerbated hypotension and mortality in the septic swine model.