Experimental models of the gut microbiome

Area of Science:

• Microbiology
• Gastroenterology
• Biotechnology

Background:

• The human gut microbiota significantly impacts health but is challenging to study directly.
• In vitro models are crucial for dynamic monitoring of gut microbial processes and metabolic activity.

Purpose of the Study:

• To review and highlight the capabilities of various in vitro gut models.
• To emphasize the advancements in in vitro models for simulating in vivo gut conditions and microbial dynamics.

Main Methods:

• Comparison of different in vitro gut models, including batch fermentations and multi-compartmental continuous systems.
• Focus on extensively used models like SHIME(®), EnteroMix, Lacroix model, and TIM-2.
• Inclusion of surface-attached mucosal microbes (M-SHIME) to enhance model realism.

Main Results:

• In vitro models, particularly M-SHIME, effectively represent in vivo microbial composition and activity.
• These models successfully maintain interpersonal variations observed in human fecal inocula.
• Advanced models demonstrate high fidelity to the complex gut environment.

Conclusions:

• In vitro gut models are valuable tools for studying gut microbiota and its role in health and disease.
• Ongoing developments, like host cell incorporation, will further enhance the predictive power of these models.
• These models offer a viable alternative for investigating gut microbial functions inaccessible through direct human studies.