Clostridioides difficile binary toxin CDT induces biofilm-like persisting microcolonies.

ABSTRACT: Clinical symptoms of Clostridioides difficile infection (CDI) range from diarrhea to pseudomembranous colitis. A major challenge in managing CDI is the high rate of relapse. Several studies correlate the production of CDT binary toxin by clinical strains of C. difficile with higher relapse rates. Although the mechanism of action of CDT on host cells is known, its exact contribution to CDI is still unclear. To understand the physiological role of CDT during CDI, we established two hypoxic relevant intestinal models, Transwell and Microfluidic Intestine-on-Chip systems. Both were challenged with the epidemic strain UK1 CDT⁺ and its isogenic CDT^- mutant. We report that CDT induces mucin-associated microcolonies that increase C. difficile colonization

SUBMITTER: Meza-Torres J 

PROVIDER: S-EPMC12931720 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature