From germ-free to wild: modulating microbiome complexity to understand mucosal immunology

Area of Science:

• Microbiology
• Immunology
• Host-Microbe Interactions

Background:

• The microbiota significantly influences host physiology at various barrier sites, including the gut, lung, and skin.
• Variations in animal model microbiota can confound experimental results in host-microbe interaction studies.
• Research into host-microbe interactions is expanding beyond the gut to other critical body sites.

Purpose of the Study:

• To discuss diverse approaches for modulating microbial complexity in laboratory animals.
• To highlight how different models aid in studying host-microbe interactions across the microbial spectrum.
• To provide insights into selecting appropriate microbial communities for rodent models.

Main Methods:

• Review of methodologies for controlling and characterizing microbial communities in laboratory rodents.
• Discussion of experimental models ranging from germ-free to wild-type animal systems.
• Analysis of how microbial diversity and community structure impact experimental outcomes.

Main Results:

• Various strategies exist to precisely modulate microbial communities in animal models.
• Different models allow for the investigation of host-microbe interactions under diverse microbial conditions.
• Controlled microbial environments are essential for reproducible host-microbe research.

Conclusions:

• Selecting appropriate microbial modulation strategies is key for advancing host-microbe interaction research.
• A spectrum of models, from germ-free to wild, offers flexibility in studying host-microbe dynamics.
• Standardizing microbial communities in animal models enhances the reliability of research findings.