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Summary
Penicillamine effectively chelates lead for increased urinary excretion. However, its effects on cadmium, mercury, and gold excretion are unclear, with potential in vivo redistribution.
Area of Science:
- Pharmacology
- Toxicology
- Biochemistry
Background:
- Penicillamine is a chelating agent used in heavy metal poisoning treatment.
- It forms in vitro complexes with toxic metals like lead, cadmium, mercury, and gold.
Purpose of the Study:
- To investigate the in vivo effects of penicillamine on the urinary excretion of heavy metals.
- To explore potential metal redistribution within the body.
Main Methods:
- Administration of penicillamine to subjects exposed to heavy metals.
- Measurement of urinary metal excretion.
- Analysis of metal binding site shifts.
Main Results:
- Penicillamine markedly and immediately increased urinary lead excretion.
- Urinary excretion of cadmium, mercury, and gold was not significantly increased.
- Evidence suggests in vivo shifts in binding sites for cadmium, and possibly mercury and gold.
Conclusions:
- Penicillamine is effective in promoting lead excretion.
- The clinical significance of penicillamine-induced metal shifts for cadmium, mercury, and gold remains undetermined.