Candida albicans infection and intestinal immunity

Area of Science:

• Immunology
• Microbiology
• Gastroenterology

Background:

• Fungal infections, particularly from Candida albicans (C. albicans), pose significant risks, especially in intensive care and immunocompromised patients.
• C. albicans, a common gut commensal, can breach the intestinal barrier and enter the bloodstream, leading to systemic infections.
• The intestinal barrier's integrity and the host's immune system are crucial for preventing and clearing invasive fungal infections.

Purpose of the Study:

• To review the immune responses elicited by intestinal Candida albicans infections.
• To elucidate the mechanisms by which the gut immune system defends against fungal invasion.
• To highlight the role of innate and adaptive immunity in controlling C. albicans in the gastrointestinal tract.

Main Methods:

• Literature review focusing on host-pathogen interactions in the gut.
• Analysis of immune cell functions within the intestinal lamina propria.
• Examination of C. albicans invasion pathways, including microfold cell translocation.

Main Results:

• Invasive C. albicans can overcome the gut epithelium via microfold cells.
• The intestinal lamina propria harbors immune cells critical for initiating antifungal responses.
• Both innate and adaptive immunity are essential for host defense against invasive intestinal candidiasis.

Conclusions:

• The intestinal immune system plays a vital role in preventing and resolving C. albicans infections.
• Understanding these immune mechanisms is key to developing strategies against life-threatening fungal diseases.
• The gut barrier and its associated immune cells are the first line of defense against invasive fungal pathogens.