Deficient Candida-specific T-helper 17 response during sepsis

Area of Science:

• Immunology
• Infectious Diseases
• Critical Care Medicine

Background:

• Patients in intensive care units (ICUs) with sepsis are susceptible to Candida infections.
• T-helper 17 (Th17) cells play a crucial role in antifungal immunity.

Purpose of the Study:

• To investigate the impact of endotoxemia and sepsis on Candida-induced Th17 responses.
• To determine if impaired Th17 responses contribute to Candida infection susceptibility in sepsis.

Main Methods:

• Experimental human endotoxemia model.
• Analysis of Th17 responses in peripheral blood mononuclear cells (PBMCs) stimulated with Candida albicans.
• Comparison of Th17 responses between healthy controls and patients with gram-negative sepsis.

Main Results:

• Th17 response was significantly lower during experimental endotoxemia compared to baseline.
• Patients with gram-negative sepsis exhibited a significantly reduced Th17 response compared to healthy individuals.
• Candida albicans stimulation revealed impaired Th17 cell activity in sepsis.

Conclusions:

• Endotoxin-related systemic inflammation, as seen in sepsis, leads to a deficient Th17 immune response.
• Impaired Th17 immunity is a potential risk factor for the development of Candida infections in sepsis patients.
• Restoring Th17 function may be a therapeutic target to prevent invasive fungal infections in sepsis.