4.7 Article

Metabolic models of human gut microbiota Advances and challenges

Journal

CELL SYSTEMS
Volume 14, Issue 2, Pages 109-121

Publisher

CELL PRESS
DOI: 10.1016/j.cels.2022.11.002

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The human gut is a complex ecosystem with hundreds of microbial species interacting with each other and the human host. Mathematical models of the gut microbiome have been used to explain observations, but the traditional Lotka-Volterra model lacks interaction mechanisms and metabolic flexibility. Recent models that describe gut microbial metabolite production and consumption have been used to study the factors shaping gut microbial composition and their impact on metabolite concentrations in diseases. This review discusses how these models are built, what we have learned so far, and the current challenges and future directions.
The human gut is a complex ecosystem consisting of hundreds of microbial species interacting with each other and with the human host. Mathematical models of the gut microbiome integrate our knowledge of this system and help to formulate hypotheses to explain observations. The generalized Lotka-Volterra model has been widely used for this purpose, but it does not describe interaction mechanisms and thus does not account for metabolic flexibility. Recently, models that explicitly describe gut microbial metabolite produc-tion and consumption have become popular. These models have been used to investigate the factors that shape gut microbial composition and to link specific gut microorganisms to changes in metabolite concen-trations found in diseases. Here, we review how such models are built and what we have learned so far from their application to human gut microbiome data. In addition, we discuss current challenges of these models and how these can be addressed in the future.

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