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Effect of mercury compounds on cholineacetyl transferase
Research Communications in Chemical Pathology and Pharmacology
|November 1, 1980
Summary
Methylmercury and mercuric chloride exposure significantly inhibit brain cholineacetyltransferase (ChAT) activity in rats, indicating potential cholinergic system involvement in mercury intoxication.
Area of Science:
- Neuroscience
- Toxicology
- Biochemistry
Background:
- Methylmercury poisoning is known to affect the central nervous system.
- Understanding the mechanism of mercury toxicity is crucial for public health.
Purpose of the Study:
- To investigate the neurotoxic effects of mercuric chloride (HgCl2) and methylmercury chloride (CH3HgCl).
- To examine the impact of these mercury compounds on cholineacetyltransferase (ChAT) activity and neural tissue.
Main Methods:
- Rats were administered HgCl2 and CH3HgCl orally via gavage and drinking water.
- Brain and diaphragm tissues were analyzed for ChAT activity.
- Histopathological examination of neural tissues was performed.
Main Results:
- Both HgCl2 and CH3HgCl significantly inhibited ChAT activity in a dose-dependent manner.
- CH3HgCl caused greater ChAT inhibition than HgCl2.
- Histopathology revealed neural degeneration and necrosis in the cerebrum.
Conclusions:
- The cholinergic system may be involved in mercury intoxication.
- Oral administration of mercury compounds can lead to neurotoxicity and ChAT inhibition.