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Sodium hypochlorite, bleaching agents, and the stratum corneum
V Goffin1, G E Piérard, F Henry
1Belgian SSTC Research Center, Department of Dermatopathology, University Medical Center Sart Tilman, Liège, Belgium.
Ecotoxicology and Environmental Safety
|August 1, 1997
Summary
Sodium hypochlorite (NaOCl) bleach affects human skin, causing subtle changes. Ex vivo corneoxenometry and squamometry effectively detect these subclinical skin damages, complementing in vivo tests.
Area of Science:
- Dermatology
- Toxicology
- Biophysics
Background:
- Sodium hypochlorite (NaOCl) interactions with human stratum corneum are not fully understood.
- NaOCl is used in decontamination protocols, necessitating an understanding of its skin effects.
- Assessing subclinical skin damage from chemical agents requires sensitive methodologies.
Purpose of the Study:
- To compare in vivo and ex vivo methods for evaluating NaOCl effects on human stratum corneum.
- To identify sensitive biomarkers for detecting infraclinical skin damage induced by NaOCl.
- To validate the predictive capability of an ex vivo bioassay for NaOCl skin interactions.
Main Methods:
- In vivo patch testing of NaOCl on human volunteers with measurements of TEWL, capacitance, and colorimetry.
- Ex vivo corneoxenometry bioassay using dilutions of NaOCl.
- Squamometry using D-Squames and sample colorimetry.
Main Results:
- No clinical reactions were observed in vivo.
- Conductance and squamometry were more sensitive than TEWL in detecting NaOCl effects.
- Ex vivo corneoxenometry accurately predicted in vivo findings.
Conclusions:
- Squamometry and corneoxenometry are valuable, complementary methods for assessing subclinical skin damage from NaOCl.
- Corneoxenometry serves as a reliable ex vivo predictive bioassay for NaOCl-induced skin effects.
- Understanding NaOCl's interaction with stratum corneum is crucial for safety and decontamination applications.