Copper hypersensitivity

Area of Science:

• Environmental Science
• Toxicology
• Immunology

Background:

• Copper production is increasing globally, leading to widespread human exposure through various items.
• Despite common exposure, allergic reactions to copper are rarely documented.
• Copper shares chemical properties with nickel, a known potent sensitizer.

Purpose of the Study:

• To investigate the implications of copper hypersensitivity.
• To review the chemistry and biology of copper.
• To analyze available data on copper allergy.

Main Methods:

• A comprehensive database search of PubMed was conducted.
• Keywords included copper, dermatitis, allergic contact dermatitis, and patch test.
• Data from clinical and experimental studies were reviewed.

Main Results:

• A weighted average of 3.8% of subjects with suspected copper-related symptoms showed positive patch test reactions.
• Copper is identified as a very weak sensitizer compared to other metal compounds.
• Clinically relevant allergic reactions to copper occur in a small subset of individuals.

Conclusions:

• Copper is a weak sensitizer, but can elicit allergic reactions.
• Understanding copper hypersensitivity is important due to increasing exposure.
• Further research may clarify the mechanisms and prevalence of copper allergy.