Gut Barrier Integrity
Gut Barrier Integrity - Related Videos
07:18
Oral Gavage in Neonatal Mouse Pups and Functional Assessment of Gut Barrier Integrity Using Ussing Chambers
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2026
This article describes: (1) oral gavage delivery of test molecules to neonatal mice as early as DOL 6; and (2) ex vivo evaluation of colonic epithelial barrier function in biopsies from DOL 10 to weaning (DOL 20) pups by assessing paracellular and transcellular permeability with Ussing chambers.
05:14
Assessment of Gut Barrier Integrity in Mice Using Fluorescein-Isothiocyanate-Labeled Dextran
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Cited by 22 •
2022
In the present study, fluorescein-isothiocyanate-labeled (FITC) dextran is administered to mice via oral gavage to evaluate intestinal permeability both in vivo and in plasma and fecal samples. As gut barrier function is affected in many disease processes, this direct and quantitative assay can be used in diverse research areas.
01:15
Assessing the Role of Gut Microbiota in Modulating Hepatitis B Infection in Mice
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2026
Take a control mouse with a normal gut microbiota and an experimental mouse with depleted gut microbiota. The depletion compromises the integrity of the gut barrier.This enables bacteria to translocate through the blood vessel into the liver tissue.Inject both mice with the hepatitis B virus or HBV plasmid to induce an HBV infection in the liver tissue.In the control mouse, the T cell detects an infected liver cell through the interaction of its receptors with viral antigens, and produces...
03:01
Assessing Blood-Brain Barrier Integrity in a Laser-Induced Brain Injury Rat Model
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2025
Source: Kuts, R. et al. Laser-Induced Brain Injury in the Motor Cortex of Rats. J. Vis. Exp. (2020)This video demonstrates assessing blood-brain barrier (BBB) integrity following laser-induced brain injury in rats. A tracking dye is injected into the tail vein, allowing it to circulate to the brain and leak into the tissue through the damaged BBB. The brain is then extracted and processed to release the dye. The fluorescence intensity of the dye is measured to quantify the extent of...
09:08
Assay for Blood-brain Barrier Integrity in Drosophila melanogaster
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Cited by 2 •
2019
Blood-brain barrier integrity is critical for nervous system function. In Drosophila melanogaster, the blood-brain barrier is formed by glial cells during late embryogenesis. This protocol describes methods to assay for blood-brain barrier formation and maintenance in D. melanogaster embryos and third instar larvae.
FAQs
Protection depends on several layers working together rather than on epithelial cells alone. Mucus limits direct contact with the lining, antimicrobial factors help oppose microbes, epithelial cells provide the cellular boundary, and immune defenses contribute biological surveillance. Examining these elements together gives a more complete picture of whether barrier function is preserved or compromised.
Tight junction proteins are especially important because they regulate the paracellular route, the space between neighboring epithelial cells. Their activity influences how readily substances move across that route without passing through the cells themselves. For biology studies, this distinction helps connect molecular changes at cell junctions with measurable changes in epithelial permeability.
When gut barrier integrity is disrupted, the biological consequence is not limited to increased passage across the lining. Unwanted molecules or microbes may enter tissues, local inflammation can develop, and host-microbe interactions may change. These linked outcomes make barrier disruption relevant to both intestinal physiology and disease-focused investigations.
Because no single component captures the full state of the intestinal barrier. A study that considers these layers can relate structural control of passage to antimicrobial protection and immune activity. This integrated perspective is useful when comparing normal physiology with infection, inflammatory disease, nutritional influences, or barrier-restoring strategies.
They can help researchers interpret whether the lining is regulating movement appropriately, whether unwanted material may cross the epithelium, and whether such changes coincide with local inflammation or altered host-microbe relationships. These outcomes connect barrier biology to questions about intestinal physiology, infection, inflammatory disease, nutrition, and possible therapeutic approaches.
Its study can identify whether epithelial function is being preserved or restored when barrier disruption is associated with inflammation or unwanted passage. The topic therefore provides a biological framework for evaluating potential therapies alongside the mucus layer, epithelial cells, antimicrobial factors, immune defenses, and tight junction proteins that collectively support intestinal protection.