Long-Term In Vitro Culture Systems to Study Human Microbiome

Area of Science:

• Microbiology
• Immunology
• Biotechnology

Background:

• The human microbiome exists in a symbiotic relationship with the host, crucial for maintaining health.
• Imbalances (dysbiosis) in microbial communities are linked to inflammatory conditions like periodontal and inflammatory bowel diseases.
• Current research models lack the human relevance and long-term stability needed to fully understand eubiosis-dysbiosis transitions.

Purpose of the Study:

• To highlight the need for advanced research models to investigate the mechanisms of eubiosis-dysbiosis transitions.
• To emphasize the importance of understanding microbial community assembly and host interactions in inflammatory diseases.
• To advocate for the development of three-dimensional (3D) constructs for long-term microbiome-host coculture.

Main Methods:

• Review of existing limitations in preclinical, clinical, and in vitro models for studying host-microbiome interactions.
• Discussion of the potential of bioreactors and organs-on-a-chip technologies for mimicking native environments.
• Proposal for the development of novel 3D constructs to overcome current technological barriers.

Main Results:

• Existing models, including short-term in vitro cultures and current bioreactors, are insufficient for long-term, human-relevant microbiome-host studies.
• Advanced 3D constructs are proposed as a superior approach to sustain complex microbial communities and host cells over extended periods.
• These constructs can enable the investigation of microbial influence on host traits in both acute and chronic inflammatory conditions.

Conclusions:

• Further development of 3D constructs is essential for advancing our understanding of host-microbiome dynamics in health and disease.
• Improved models are critical for identifying disease triggers and developing targeted therapeutics for inflammatory conditions.
• This research direction promises to bridge the gap between current research capabilities and the complexity of human microbiome-host interactions.