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Related Experiment Videos

Copper-binding protein in acute copper poisoning.

E Kurisaki1, Y Kuroda, M Sato

  • 1Department of Legal Medicine, Central Research Laboratory, Fukushima Medical College, Japan.

Forensic Science International
|July 1, 1988
PubMed
Summary

This case study details a fatal copper sulfate ingestion, revealing significant copper accumulation in tissues. The body’s detoxification protein, metallothionein (MT), was activated in the liver and kidneys.

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Area of Science:

  • Toxicology
  • Pathology
  • Biochemistry

Background:

  • Copper sulfate ingestion can lead to severe toxicity.
  • Understanding the body's response to heavy metal poisoning is crucial for diagnosis and treatment.

Observation:

  • A post-mortem examination of a suicide case involving copper sulfate ingestion revealed esophageal and stomach necrosis.
  • Histological analysis showed liver necrosis and renal insufficiency.

Findings:

  • Quantitative analysis indicated significantly elevated copper levels (3.5-24 times normal) in blood, liver, kidney, and lung tissues.
  • Chromatography revealed that accumulated copper in the liver and kidney was primarily bound to metallothionein (MT), a metal-binding protein.
  • No copper-bound MT was detected in the lung.

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Implications:

  • The findings suggest that metallothionein (MT) formation in the liver and kidney is an early response to acute copper poisoning.
  • This highlights MT's role in detoxifying excess copper, even in fatal poisoning cases.
  • The study provides insights into the biochemical mechanisms of copper toxicity.