In vitro models to study Clostridioides difficile infection: current systems and future advances.

Area of Science:

• Microbiology
• Infectious Diseases
• Gastroenterology

Background:

• Clostridioides difficile infection (CDI) is a significant healthcare-associated diarrheal illness, posing an urgent threat.
• Traditional in vivo animal models have limitations in accurately reflecting human CDI due to physiological differences.
• In vitro models offer enhanced control and the potential to use human ex-vivo cells for studying CDI.

Approach:

• Investigating the challenges of simulating the colonic environment in vitro.
• Evaluating bacterial fermentation models for therapeutic testing and microbiota research.
• Exploring co-culture models of human and bacterial cells, despite differing environmental requirements.

Key Points:

• Recent advancements enable longer culture times and more representative bacterial populations in in vitro models.
• Bacterial fermentation models, while useful, currently lack scalability for widespread adoption.
• Co-culturing human and bacterial cells presents challenges due to distinct cellular condition needs.

Conclusions:

• Evolving in vitro models are becoming more physiologically relevant for simulating CDI.
• These advanced models enhance the study of CDI pathogenesis and therapeutic development.
• The expanding applicability of in vitro models promises improved understanding and management of CDI.