Hexachlorophene in mice. Effects after long-term percutaneous applications

Area of Science:

• Toxicology
• Dermatology
• Neuroscience

Background:

• Hexachlorophene is a chemical agent with historical use in antiseptic products.
• Concerns exist regarding its potential toxicity and carcinogenicity following skin application.

Purpose of the Study:

• To investigate the long-term toxicity and carcinogenicity of topical hexachlorophene in Swiss mice.
• To assess local skin effects, systemic toxicity, and potential tumor development.

Main Methods:

• Swiss mice were subjected to twice-weekly topical applications of 0.02 ml of 50% or 25% hexachlorophene solutions.
• Animals were monitored for skin reactions, neurological symptoms, mortality, and tumor incidence.
• Autopsies were performed to examine central nervous system pathology.

Main Results:

• High concentrations of hexachlorophene induced skin necrosis, ulceration, and significant mortality within two weeks.
• Neurological symptoms and central nervous system edema/cystic lesions were observed, with some lesions persisting.
• No statistically significant increase in skin tumors or tumors in other organs was noted compared to control groups.

Conclusions:

• Percutaneous hexachlorophene application demonstrates significant local and systemic toxicity in mice.
• Despite observed toxic effects, hexachlorophene did not exhibit carcinogenic properties in this study.
• The findings suggest a dissociation between hexachlorophene's acute toxicity and its long-term carcinogenic potential via skin exposure.