IL-27/IL-27 Receptor Signaling Provides Protection in Clostridium difficile-Induced Colitis.

Area of Science:

• Immunology
• Microbiology
• Infectious Diseases

Background:

• Clostridium difficile infection (CDI) is a significant cause of hospital-acquired infections.
• The specific role of interleukin-27 (IL-27) in CDI pathogenesis was previously uncharacterized.

Purpose of the Study:

• To investigate the role of IL-27 in the host immune response during CDI.
• To determine the therapeutic potential of IL-27 in managing CDI.

Main Methods:

• Quantified IL-27 production in human and murine CDI models.
• Utilized wild-type (WT) and IL-27 receptor-deficient (WSX-1-/-) mice infected with C. difficile.
• Assessed host response parameters including weight loss, colonic damage, bacterial clearance, and survival.

Main Results:

• Elevated IL-27 levels were observed during CDI in both humans and mice.
• WSX-1-/- mice exhibited exacerbated disease severity, including increased weight loss, colonic damage, and reduced survival.
• IL-27 administration mitigated CDI-associated mortality and pathology, enhancing bacterial clearance in WT mice.

Conclusions:

• IL-27 demonstrates a previously unrecognized protective function in CDI pathogenesis.
• IL-27 signaling modulates key inflammatory cytokines (IL-17A, IL-23, IL-10, IFN-γ) during CDI.
• Findings suggest IL-27 as a potential therapeutic target for C. difficile-induced pathology.