Biofilm Assay for Clostridioides difficile with Applications for Drug Discovery.

Area of Science:

• Microbiology
• Infectious Diseases
• Drug Discovery

Background:

• Clostridioides difficile is a major cause of gastrointestinal infections.
• Treatment failure occurs in a significant portion of patients receiving antibiotics or fecal microbiota transplant (FMT).
• The role of C. difficile biofilms in recurrent infections remains largely unexplored.

Purpose of the Study:

• To develop and validate a robust assay for detecting activity against established C. difficile biofilms.
• To adapt this assay for high-throughput screening of repositionable compounds.
• To identify potential therapeutic agents targeting C. difficile biofilms.

Main Methods:

• Refinement of a C. difficile biofilm formation assay.
• Coupling biofilm formation with metabolic activity assays for readout.
• Drug susceptibility testing and screening of a library of repositionable compounds against biofilms.

Main Results:

• The protocol establishes a reproducible method for biofilm formation and assessment.
• The assay effectively identifies compounds with activity against established C. difficile biofilms.
• Demonstration of drug screening using a repositioning library.

Conclusions:

• C. difficile biofilms represent a promising therapeutic target for recurrent infections.
• The developed assay is suitable for identifying novel drug candidates.
• This approach can accelerate the discovery of new treatments for C. difficile infection (CDI).