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Changes in hepatic nuclei induced by acetamide and thioacetamide
Archives of Pathology & Laboratory Medicine
|August 1, 1976
Summary
Thioacetamide and acetamide cause rapid liver nuclei enlargement in rats. Thioacetamide-induced nuclear swelling persists longer and may involve water shifts, unlike acetamide.
Area of Science:
- Hepatology
- Toxicology
- Cell Biology
Background:
- Acetamide and thioacetamide are chemicals known to affect liver function.
- Understanding the early cellular changes induced by these agents is crucial for assessing liver toxicity.
Purpose of the Study:
- To investigate the temporal effects of thioacetamide and acetamide on rat liver nuclei size and composition.
- To differentiate the mechanisms underlying the initial nuclear enlargement caused by these two agents.
Main Methods:
- Administration of thioacetamide or acetamide to rats.
- Microscopic examination of liver nuclei.
- Flow cytometry analysis of isolated nuclei.
- Chemical analysis of isolated nuclei for RNA content.
Main Results:
- Both agents caused prompt nuclear enlargement in rat liver cells.
- Acetamide-induced enlargement was transient, with nuclei returning to normal size within 16 hours.
- Thioacetamide caused a biphasic nuclear enlargement, with a prolonged increase observed up to 24 hours.
- Increased nuclear RNA content was observed during the later phase of thioacetamide intoxication.
- Flow cytometry confirmed microscopic observations of nuclear size changes.
Conclusions:
- The initial nuclear volume increase induced by thioacetamide and acetamide is likely due to intracellular water and electrolyte shifts, not immediate macromolecular synthesis.
- Thioacetamide induces a more sustained nuclear response compared to acetamide, suggesting distinct toxicological pathways.
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