Systemic candidiasis in mice immunized with Candida albicans ribosomes

Area of Science:

• Immunology
• Mycology
• Pathology

Background:

• Previous studies demonstrated that vaccination with Candida albicans ribosomes protects mice against experimental systemic candidiasis.
• The kidney is a primary target organ in systemic candidal infections, making it crucial to assess vaccination effects on renal pathology and fungal burden.

Purpose of the Study:

• To investigate the impact of ribosomal vaccination on the course of systemic candidiasis in immunized mice.
• To evaluate the histopathology and quantify Candida albicans colonization in the kidneys of vaccinated and control mice at various time points post-infection.

Main Methods:

• Mice were immunized with Candida albicans ribosomes.
• Immunized and control mice were intravenously inoculated with live Candida albicans.
• Kidney histopathology and quantitative fungal colonization were assessed at different time intervals post-infection.

Main Results:

• Kidney colonization by Candida albicans was significantly lower in immunized mice compared to controls, particularly with lower challenge doses.
• Inhibition of fungal multiplication in immunized mice correlated with increased resistance to lethal challenge and higher survival rates.
• Histopathological changes and fungal elements were evident in control mouse kidneys early post-infection, whereas immunized mice showed minimal to no renal pathology even after 3 days.

Conclusions:

• Ribosomal vaccination effectively diminishes Candida albicans colonization in the kidneys, a major site of infection.
• This vaccination strategy confers significant protection against systemic candidiasis, evidenced by reduced fungal burden and improved survival.