Microbial Metabolites

Microbial metabolites are small molecules produced by bacteria, fungi, archaea, and other microorganisms during growth and environmental adaptation, making them important drivers of biological interactions and ecosystem function. Cells generate primary metabolites through pathways such as glycolysis, fermentation, and amino acid biosynthesis, while secondary metabolites often arise under specific conditions and include compounds that mediate competition, communication, or defense. In biology, these molecules support research on microbial physiology, host-microbe interactions, and the gut microbiome, and they provide sources for antibiotics, enzymes, biofuels, pharmaceuticals, and other biotechnological products.

Microbial Metabolites - Related Videos

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JoVE Journal - Biology
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Evaluating Leaf Responses to Microbial Secondary Metabolites Using A High-Throughput Format

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2025

This protocol describes a high-throughput approach for evaluating plant ion leakage, peroxidase activity, and callose production in the same sample.

Research

JoVE EoE - Neurotherapeutics

Intracranial Injection of Gut-Derived Microbial Metabolites in a Mouse Model

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2025

Source: Liou, C. et al. Intracerebroventricular Delivery of Gut-Derived Microbial Metabolites in Freely Moving Mice. J. Vis. Exp. (2022).This video demonstrates the intracranial injection of short-chain fatty acids (SCFAs) in a freely moving mouse to study their effects on brain-mediated behavior. An injector cannula is inserted into a guide cannula implanted in the mouse brain. After recovery, the mouse acclimates in a novel cage. SCFAs are then administered, and locomotor behavior is recorded.

Intracerebroventricular Delivery of Gut-Derived Microbial Metabolites in Freely Moving Mice

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Cited by 4 •

2022

Gut-derived microbial metabolites have multifaceted effects leading to complex behavior in animals. We aim to provide a step-by-step method to delineate the effects of gut-derived microbial metabolites in the brain via intracerebroventricular delivery via a guide cannula.

Investigating the Human Gut Microbial Activity on Exopolysaccharides

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2026

Source: Hu, Y. et.al., Analysis of Interactions between Endobiotics and Human Gut Microbiota Using In Vitro Bath Fermentation Systems. J. Vis. Exp. (2019)This video demonstrates the analysis of short-chain fatty acid production by human gut microbiota in response to exopolysaccharides. This highlights microbial fermentation products separation and quantification using gas chromatography. The results reveal that exopolysaccharides modulate microbial metabolites that influence host-pathogen...

Detection of Human Fecal Metabolites Using a Bacterial Biosensor

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2026

Begin with a bacterial biosensor culture suspended in a medium.These engineered bacteria produce a transcription factor that, upon binding to a specific fecal metabolite, activates a promoter associated with a fluorescent reporter gene.To this culture, add a filtered human fecal sample containing metabolites, such as lactate, that are involved in host-microbiome interactions.Dilute this mixture with a fresh medium to maintain an optimal reaction volume.Incubate without shaking to mimic the...

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