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Eugenol causes oxidant-mediated edema in isolated perfused rabbit lungs
1Division of Pulmonary and Critical Care Medicine, Medical University of South Carolina, Charleston.
The American Review of Respiratory Disease
|April 1, 1991
Summary
Eugenol, a clove extract, can cause lung edema through oxidant mechanisms. This study in isolated rabbit lungs confirms eugenol
Area of Science:
- Pulmonary Medicine
- Toxicology
- Biochemistry
Background:
- Eugenol, derived from cloves, is linked to pulmonary edema from clove cigarette inhalation.
- The precise mechanism of eugenol-induced lung injury remains unclear.
Purpose of the Study:
- To investigate if eugenol directly induces lung edema via oxidant-mediated pathways.
- To explore the role of oxygen metabolites in eugenol's edemogenic effects.
Main Methods:
- Isolated rabbit lungs were perfused with a cell-free solution containing eugenol (0.1 and 1.0 mM).
- Lung edema was assessed by measuring lung weight gain and wet-to-dry weight ratios.
- The effects of oxygen metabolite scavengers (catalase, dimethylthiourea) were evaluated.
Main Results:
- Eugenol infusion (1.0 mM) significantly increased lung weight and wet-to-dry ratios, indicating edema.
- Catalase and dimethylthiourea attenuated eugenol-induced lung edema.
- Superoxide dismutase and heat-inactivated catalase did not prevent edema.
Conclusions:
- Eugenol directly causes lung edema in isolated lungs through oxidant-mediated mechanisms.
- These effects occur independently of circulating blood cells.
- Eugenol serves as a potential laboratory model for studying edemogenic disorders.