Related Experiment Video
Updated: Jun 1, 2026
05:44
Skin Biopsy for Diagnosing Discoid Lupus Erythematosus
Published on: June 10, 2025
Photoprovocation in cutaneous lupus erythematosus: a multicenter study evaluating a standardized protocol
Annegret Kuhn1, Anna Wozniacka, Jacek C Szepietowski
1Department of Dermatology, University of Münster, Münster, Germany. kuhnan@uni-muenster.de
The Journal of Investigative Dermatology
|May 20, 2011
Summary
Standardized photoprovocation reliably assesses photosensitivity in cutaneous lupus erythematosus (CLE) patients. This safe method, using UVA/UVB, induced lupus lesions in nearly half of CLE subjects, aiding future diagnosis and trials.
Area of Science:
- Dermatology
- Immunology
- Photobiology
Background:
- Photosensitivity is a key, yet poorly defined, symptom in cutaneous lupus erythematosus (CLE) subtypes.
- Accurate assessment of photosensitivity is crucial for diagnosing and managing CLE.
Purpose of the Study:
- To determine if standardized photoprovocation is a reproducible method for assessing photosensitivity in CLE patients.
- To evaluate the safety and efficacy of a standardized photoprovocation protocol.
Main Methods:
- A standardized photoprovocation protocol using UVA and UVB radiation was applied to 47 CLE subjects and 13 healthy volunteers across seven European sites.
- Clinical and histopathological analysis assessed lesion development.
- Minimal erythema dose (MED) and Fitzpatrick phototypes were recorded.
Main Results:
- Photoprovoked lesions developed in 47% of CLE subjects (SCLE, DLE, LET) but none of the controls.
- Histopathology confirmed lupus erythematosus (LE) in 86% of subjects with induced lesions.
- Subjects with UV-induced lesions had significantly lower MEDs and were predominantly Fitzpatrick phototypes I/II.
- Results were consistent across study sites, and the procedure was safe.
Conclusions:
- Standardized photoprovocation is a safe, reproducible method for assessing photosensitivity in CLE.
- This protocol can induce characteristic skin lesions and may be valuable for future diagnostic testing and clinical trials in CLE.
- The findings highlight the role of UV radiation in CLE pathogenesis and patient stratification.
