Chelating effect of EDTA on nickel

Area of Science:

• Dermatology
• Allergology
• Pharmacology

Background:

• Nickel allergy is a common cause of allergic contact dermatitis.
• Disodium ethylenediamine tetra-acetate (EDTA) is a chelating agent with potential anti-allergic properties.

Purpose of the Study:

• To investigate the chelating effect of disodium ethylenediamine tetra-acetate (EDTA) in blocking nickel allergy.
• To evaluate the potential of EDTA cream as a protective barrier for nickel-allergic individuals.

Main Methods:

• A double-blind, placebo-controlled study was conducted on nickel-allergic patients.
• One half of the back was pretreated with 10% EDTA cream, the other with a cream base.
• Nickel sulfate patch tests were applied to both areas to assess allergic reactions.

Main Results:

• The 10% EDTA cream demonstrated a statistically significant blocking effect on nickel-induced allergic reactions (p < 0.01).
• The cream base alone showed no significant blocking effect compared to EDTA.

Conclusions:

• Disodium ethylenediamine tetra-acetate (EDTA) exhibits a significant chelating and blocking effect against nickel allergy.
• EDTA barrier creams may offer a beneficial therapeutic option for managing nickel allergy, particularly hand eczema.