Contact sensitivity to captafol in BALB/c mice

Area of Science:

• Toxicology
• Immunology
• Dermatology

Background:

• Captafol is a fungicide known to cause irritant and allergic contact dermatitis in humans and guinea pigs.
• The sensitization potential of captafol in a mouse model has not been extensively studied.

Purpose of the Study:

• To investigate the ability of purified captafol to induce contact sensitization in BALB/c mice.
• To compare the sensitization potential of captafol with dinitrofluorobenzene (DNFB), a known sensitizer.

Main Methods:

• Female BALB/c mice were pretreated with cyclophosphamide or saline.
• Captafol or DNFB was applied to the shaved abdomen for induction over varying durations.
• Mice were challenged on the ear with captafol or DNFB, and ear thickness was measured.

Main Results:

• Captafol induced significant contact hypersensitivity in mice, evidenced by increased ear thickness after challenge.
• The response was slightly enhanced with a lower dose and multiple induction applications.
• Cyclophosphamide pretreatment did not increase the overall response to captafol.
• Histological examination revealed edema and cellular infiltration in the ears of captafol- and DNFB-treated mice.

Conclusions:

• Captafol demonstrates the ability to induce contact hypersensitivity in BALB/c mice.
• The findings support captafol's role as a contact sensitizer.
• The mouse model is suitable for further investigation of captafol-induced allergic contact dermatitis.