Related Experiment Videos
Biochemical changes in rat lung during acute paraquat intoxication
1Biosciences Division, Defence and Civil Institute of Environmental Medicine, North York, Ontario, Canada.
Biomedical and Environmental Sciences : BES
|September 1, 1990
Summary
Paraquat (PQ) exposure in rats increased lung weight and altered key enzyme activities. These biochemical changes may serve as indicators of PQ-induced lung damage and repair processes.
Area of Science:
- Toxicology
- Biochemistry
- Pulmonary Medicine
Background:
- Paraquat (PQ) is a widely used herbicide with known toxicity.
- Understanding the biochemical effects of PQ on lung tissue is crucial for assessing its toxicological impact.
Purpose of the Study:
- To investigate the effects of a single intraperitoneal dose of PQ on lung weight and pulmonary enzyme activities in male Wistar rats.
- To identify potential biochemical markers for PQ-induced lung injury.
Main Methods:
- Male Wistar rats were administered PQ (30 mg/kg) intraperitoneally.
- Lung wet weight and the activity of pulmonary angiotensin-converting enzyme, alkaline phosphatase, glucose-6-phosphate dehydrogenase, and glutathione reductase were measured at various time points (4 h to 3 days).
Main Results:
- PQ administration led to 14% mortality and significant increases in lung wet weight (28-93%) at 2-3 days post-treatment.
- Pulmonary angiotensin-converting enzyme and alkaline phosphatase activities were significantly reduced.
- Glucose-6-phosphate dehydrogenase activity initially dropped then increased significantly, while glutathione reductase activity decreased.
Conclusions:
- PQ exposure significantly alters lung weight and specific pulmonary enzyme activities in rats.
- These enzyme activity changes may serve as valuable biochemical indicators of PQ-induced lung damage and the subsequent repair mechanisms.