Infecting Mice with Malassezia spp. to Study the Fungus-Host Interaction

Overview

This protocol describes the establishment of a novel mouse model to study the skin fungus, Malassezia, and its interaction with mammalian skin in vivo. This model allows for the investigation of immune mechanisms against Malassezia in a tissue-specific manner, providing insights into skin disorders like atopic dermatitis.

Key Study Components

Area of Science

• Neuroscience
• Immunology
• Microbiology

Background

• Malassezia is linked to various skin disorders.
• Understanding immune responses to fungi may lead to new treatment strategies.
• This model addresses the need for studying skin commensal fungi's effects on the immune system.
• Malassezia species are classified as BSL-2 organisms in some regions.

Purpose of Study

• To develop a mouse model for studying Malassezia-host interactions.
• To analyze inflammation and fungal burden in skin tissue.
• To explore the immune response to Malassezia in the context of skin disorders.

Methods Used

• In vitro cultivation of Malassezia in mDixon medium.
• Infection of murine skin with Malassezia using an olive oil suspension.
• Measurement of ear thickness to assess inflammation.
• Quantification of fungal burden through homogenization and plating on mDixon agar.

Main Results

• Significant increase in ear thickness observed after Malassezia application.
• Fungal burden in infected skin was 100 to 1000 times above detection limits.
• Histological analysis can determine skin pathology.
• Isolation of immune cells from skin and lymph nodes to study antifungal responses.

Conclusions

• This model facilitates the study of immune responses against Malassezia.
• It provides insights into the role of Malassezia as a commensal in skin disorders.
• Further research may lead to improved treatments for chronic inflammatory skin diseases.

Frequently Asked Questions