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The antigenicity of trichophyton rubrum: In situ studies by an immunoperoxidase technique in light and electron
Abstract:
The antigenic sites of cultured and invading Trichophyton rubrum can be located by using an immunoperoxidase technique in light and electron microscopy. The cell wall is identified as a major antigenic determinant in both cultured and invading T. rubrum and, in the cultured dermatophyte, other intracellular structures are also shown to be antigenic. The keratin immediately surrounding invading hyphae shows positive staining, suggesting the diffusion of dermatophyte-derived antigens, possibly keratinolytic enzymes.
Insights
The cell wall of Trichophyton rubrum is a key antigenic site in both cultured and invading forms. Antigens may diffuse from invading hyphae, potentially including keratinolytic enzymes.
Area of Science:
- Mycology
- Immunology
- Dermatology
Background:
- Trichophyton rubrum is a common cause of dermatophytosis.
- Understanding its antigenic properties is crucial for host immune response.
- Invasive T. rubrum interacts with host keratin.
Purpose of the Study:
- To identify antigenic sites on cultured and invading Trichophyton rubrum.
- To investigate the role of the cell wall as an antigenic determinant.
- To examine antigen presence in the surrounding host tissue.
Main Methods:
- Immunoperoxidase technique.
- Light microscopy.
- Electron microscopy.
Main Results:
- The cell wall of T. rubrum was identified as a major antigenic determinant in both cultured and invasive states.
- Intracellular structures of cultured T. rubrum also exhibited antigenic properties.
- Positive staining of surrounding keratin indicated diffusion of dermatophyte antigens, possibly keratinolytic enzymes.
Conclusions:
- The cell wall is a primary antigenic target of T. rubrum.
- Antigenic material, potentially enzymes, is released by invading hyphae.
- This suggests a mechanism for host tissue interaction and immune stimulation.