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Updated: May 24, 2026
22:06
Induction and Monitoring of Adoptive Delayed-Type Hypersensitivity in Rats
Published on: October 1, 2007
New insights about delayed allergic hypersensitivity to corticosteroids
1Departement of Dermatology, Saint-Luc University Clinic, Louvain Catholic University, Bruxelles, Belgium.
Summary
Allergic hypersensitivity to corticosteroids is common, with delayed reactions more frequent. A simplified classification of corticosteroids into three groups aids in understanding cross-reactivity patterns and predicting allergic responses.
Area of Science:
- Dermatology
- Pharmacology
- Immunology
Background:
- Corticosteroids are widely used topically and systemically.
- Allergic hypersensitivity to corticosteroids, particularly delayed-type reactions, is a common clinical finding.
Purpose of the Study:
- To simplify the classification of corticosteroids based on their chemical structures.
- To better understand cross-reactions between different corticosteroids and predict allergic potential.
Main Methods:
- Patch testing with various corticosteroids.
- Molecular modelling to analyze corticosteroid structures.
- Re-evaluation of existing corticosteroid classifications.
Main Results:
- A new classification of corticosteroids into three groups based on structure and allergenicity was established.
- Group 1 (non-methylated, non-halogenated) causes most allergic reactions.
- Group 2 (halogenated, C16/C17 cis ketal/diol) and Group 3 (halogenated, C16-methylated) are less frequently associated with allergies.
Conclusions:
- The simplified three-group classification effectively categorizes corticosteroids by their potential to cause allergic hypersensitivity.
- This classification aids clinicians in predicting and managing corticosteroid-induced allergies and cross-reactions.
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