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Related Experiment Videos

Patch testing with components of water-based metalworking fluids.

Johannes Geier1, Holger Lessmann, Peter J Frosch

  • 1Informationsverbund Dermatologischer Kliniken, University of Göttingen, Göttingen, Germany. jgeier@med.uni-goettingen.de

Contact Dermatitis
|December 3, 2003
PubMed
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Diglycolamine is a significant allergen in water-based metalworking fluids (MWFs) causing allergic contact dermatitis. Further research is needed to establish the allergenicity of 2-amino-2-ethyl-1,3-propanediol (AEPD) and methyldiethanolamine (MDEA).

Area of Science:

  • Occupational Dermatology
  • Chemical Sensitization
  • Contact Dermatitis

Background:

  • Water-based metalworking fluids (MWFs) are common causes of irritant and allergic contact dermatitis in occupational settings.
  • Existing patch testing panels cover only a limited range of potential MWF allergens, necessitating the investigation of novel sensitizers.
  • The diverse chemical composition of MWFs presents a diagnostic challenge for identifying causative agents of allergic contact dermatitis.

Purpose of the Study:

  • To evaluate the sensitization potential of 13 frequently used MWF components not routinely included in patch testing.
  • To identify new allergens responsible for allergic contact dermatitis in patients with occupational MWF exposure.
  • To determine the appropriate patch test concentration for diglycolamine.

Main Methods:

Related Experiment Videos

  • A multicenter study involving 233 dermatitis patients with occupational MWF exposure.
  • Patch testing with a panel of 13 selected MWF components, alongside standard allergen panels.
  • Clinical relevance assessment by verifying the presence of identified allergens in workplace MWFs.

Main Results:

  • Seven patients showed positive reactions to the study panel.
  • Five patients exhibited allergic reactions to diglycolamine (2-(2-aminoethoxy) ethanol), with clinical relevance confirmed in three cases.
  • One patient each reacted to 2-amino-2-ethyl-1,3-propanediol (AEPD) and methyldiethanolamine (MDEA).

Conclusions:

  • Diglycolamine is identified as an important and clinically relevant allergen in MWFs, independent of other ethanolamines.
  • A patch test concentration of 1% petrolatum (pet.) is suggested as appropriate for diglycolamine.
  • The allergenic potential of AEPD and MDEA requires further investigation, and other tested components may have low sensitization potential or require adjusted test concentrations.