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Extrahepatic lesions induced by acetaminophen in the mouse
M E Placke1, D S Wyand, S D Cohen
1Department of Pathobiology, School of Pharmacy, University of Connecticut, Storrs 06268.
Toxicologic Pathology
|January 1, 1987
Summary
Acetaminophen overdose causes more than liver and kidney damage. Studies show toxicity affects lungs, testes, spleen, and Peyer's patches, highlighting broader health risks.
Area of Science:
- Toxicology
- Pharmacology
- Pathology
Background:
- Acetaminophen (APAP) overdose is a leading cause of acute liver failure.
- Extrahepatic manifestations, primarily nephrotoxicity, are less documented.
- Limited understanding of APAP's systemic toxic effects beyond the liver and kidneys.
Purpose of the Study:
- To investigate the extrahepatic toxic effects of acetaminophen in an acute overdose model.
- To identify specific non-hepatic tissues affected by acetaminophen toxicity.
- To characterize the temporal development of these extrahepatic lesions.
Main Methods:
- Administration of acetaminophen (600 mg/kg) to fasted adult male mice (standard and germ-free).
- Oral administration route for acetaminophen.
- Necropsy and histological examination at various time points (30 minutes to 48 hours).
Main Results:
- Acetaminophen induced nephrosis, paralleling hepatic damage (2-4 hours).
- Necrosis of bronchiolar epithelium (4-6 hours) and testicular damage (spermatidic degeneration, multinucleated giant cells) were observed.
- Lymphoid necrosis in splenic follicles and Peyer's patches noted (18-24 hours).
Conclusions:
- Acetaminophen toxicity extends beyond the liver and kidneys.
- Four additional non-hepatic tissues (lungs, testes, spleen, Peyer's patches) are susceptible to acetaminophen-induced damage.
- These findings necessitate consideration of broader organ involvement in acetaminophen overdosage cases.