Gut Microbial Vesicles

Gut microbial vesicles are membrane-bound particles released by bacteria in the gastrointestinal tract that transport biological molecules between microbes and host cells. Formed by membrane budding or cell-envelope remodeling, these vesicles can contain lipids, proteins, metabolites, and nucleic acids that remain protected as they move through the gut environment. After reaching intestinal epithelial or immune cells, they can influence barrier function, microbial communication, and host immune responses. Studying gut microbial vesicles helps clarify how the microbiota affects physiology and disease, while supporting research into biomarkers, mechanisms of host-microbe interaction, and vesicle-based therapeutic delivery.

Gut Microbial Vesicles - Related Videos

Research

JoVE EoE - Bacterial Pathogenesis and Host Interactions

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...

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.

Evaluating the Effect of Beneficial Bacteria on Gut Microbial Translocation in Heat-Stressed Rats

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2025

Source: Sorokulova, I., et al. Prevention of Heat Stress Adverse Effects in Rats by Bacillus subtilis Strain. J. Vis. Exp. (2016)This video demonstrates rats pre-treated with beneficial bacteria or phosphate-buffered saline (PBS) and exposed to heat stress to evaluate gut barrier integrity. Fewer gut-derived bacterial colonies from the liver of treated rats, in contrast to numerous colonies in control rats, indicate an intact epithelial barrier and minimal bacterial translocation.

Separation and Differential Characterization of Gut Microbial Extracellular Vesicles in Salt-Sensitive Rats under High-Salt Diet Conditions

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Cited by 1 •

2025

The protocol describes the isolation of gut microbial EVs from salt-sensitive rats fed HSD using density gradient centrifugation. EVs were characterized by nanoparticle tracking, TEM, LPS/BCA assays, and 16S rRNA sequencing to analyze the size, morphology, composition, and microbiota origin.

Extracting DNA from the Gut Microbes of the Termite (Zootermopsis Angusticollis) and Visualizing Gut Microbes

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Cited by 18 •

2007

This video illustrates the technique for extracting DNA from the species of microbes resident in the termite hindgut. The preparation of a wet mount slide, which is useful for visualizing the gut microbial community is also illustrated, and a tour through the species-rich gut environment is given.

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