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Effect of zinc on lead-induced changes in brain lysosomal enzymes in the chick embryo
Insights
Zinc (Zn) administration protected chick embryos from lead (Pb) toxicity. Zn reduced Pb accumulation and prevented harmful changes in brain enzyme activity, suggesting a protective role against lead poisoning.
Area of Science:
- Toxicology
- Developmental Biology
- Biochemistry
Background:
- Lead (Pb) is a toxic heavy metal with known adverse effects on neurological development.
- Enzyme activity alterations in the brain are indicators of heavy metal-induced toxicity.
- Zinc (Zn) is an essential mineral that may play a role in mitigating heavy metal toxicity.
Purpose of the Study:
- To investigate the protective effects of zinc (Zn) against lead (Pb) toxicity in developing chick embryos.
- To assess the impact of simultaneous Zn and Pb administration on Pb accumulation in the brain.
- To evaluate the influence of Zn on Pb-induced changes in key brain enzyme activities.
Main Methods:
- Fertilized chick eggs were administered zinc (Zn) and lead (Pb) concurrently via the yolk sac.
- Lead (Pb) accumulation in the embryonic brain was quantified.
- Activities of acid phosphatase, beta-glucuronidase, and ribonuclease in the brain were measured.
Main Results:
- Simultaneous administration of Zn with Pb significantly reduced Pb accumulation in the chick embryo brain.
- Zn administration prevented alterations in the activities of acid phosphatase, beta-glucuronidase, and ribonuclease caused by Pb.
- These findings indicate that Zn mitigates Pb-induced neurotoxicity.
Conclusions:
- Zinc (Zn) exhibits a protective effect against lead (Pb) toxicity during embryonic development.
- Zn may counteract Pb-induced neurotoxic effects by reducing Pb brain accumulation and normalizing enzyme activities.
- This study highlights the potential of Zn as a countermeasure to Pb poisoning.
Abstract:
Administration of zinc (Zn) simultaneously with lead (Pb) into the chick egg yolk sac reduced the accumulation of Pb and Pb-induced alterations in the activities of acid phosphatase, beta-glucuronidase and ribonuclease in the brain of the embryo. The results suggest protection against toxic effects of Pb by Zn.
