Intestinal Lumen
Intestinal Lumen - Related Videos
03:21
Localized Delivery of Bacteria into the Intestinal Lumen of a Zebrafish Larva Using Microinjection
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2025
Source: Li, J. et al. Development of a Larval Zebrafish Infection Model for Clostridioides difficile. J. Vis. Exp. (2020)This video demonstrates the microinjection-based delivery of fluorescently labeled Clostridioides difficile into the intestinal lumen of an anesthetized zebrafish larva. It outlines the steps involved in larval preparation, bacterial injection, and fluorescence microscopy–based confirmation of bacterial localization within the intestine.
03:21
Gut Acidification Monitoring Assay: A Technique to Study the Acidification of the Intestinal Lumen in Drosophila using Bromophenol Blue Dye
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2025
This video demonstrates an assay to monitor gut acidification in Drosophila flies. After the ingestion of food supplemented with a pH indicator dye, the acidification of the intestinal lumen results in a change in the color of the dye. Visual inspection of the digestive tract of the flies to examine the color change provides evidence of acidification.
12:15
The C. elegans Intestine As a Model for Intercellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis at the Single-cell Level: Labeling by Antibody Staining, RNAi Loss-of-function Analysis and Imaging
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Cited by 13 •
2017
The transparent C. elegans intestine can serve as an "in vivo tissue chamber" for studying apicobasal membrane and lumen biogenesis at the single-cell and subcellular level during multicellular tubulogenesis. This protocol describes how to combine standard labeling, loss-of-function genetic/RNAi and microscopic approaches to dissect these processes on a molecular level.
04:37
Intestinal Crypts Isolation: A Method to Isolate Whole Crypts from Small Intestine of Murine Model
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2023
In this video, we demonstrate a technique to isolate whole crypts from a mouse’s small intestine. The isolated whole crypts can be used to propagate long-lived and self-renewing 3D organoids in vitro.
10:58
A Protocol for Lentiviral Transduction and Downstream Analysis of Intestinal Organoids
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Cited by 81 •
2015
In this video protocol we give a step by step explanation of lentiviral transduction in organoids of primary intestinal epithelium and of processing and downstream analysis of these cultures by quantitative RT-PCR, RNA-microarray and immunohistochemistry.
FAQs
Within this compartment, enzymes break down food components while bile contributes to the breakdown of nutrients. These chemical activities convert luminal contents into smaller molecules that can be considered for epithelial uptake. Their action therefore links digestion to absorption, because the epithelium transports selected small molecules, water, and ions across the mucosal barrier into the body.
Resident microorganisms alter luminal contents through their own metabolism, adding a biological layer to digestion that is distinct from enzyme- and bile-driven processing. Those changes can influence how host tissues encounter material in the lumen and help researchers investigate host-microbe communication. Consequently, microbial activity is relevant to both normal gut biology and the study of gastrointestinal disorders.
The intestinal epithelium performs two connected roles: it permits selected water, ions, and small molecules to move from luminal contents into the body, while the mucosal barrier helps organize the interface between those contents and host tissue. This balance makes epithelial function central to nutrient uptake, intestinal defense, and interpretation of changes associated with disease.
Examining the intestinal lumen can connect several biological processes that are often studied separately: nutrient processing, absorption, epithelial defense, and microbial activity. This integrated perspective helps researchers evaluate how luminal contents interact with the mucosal barrier and how those interactions relate to gut health or gastrointestinal disorders. It also provides context for investigating host-microbe communication.
The lumen’s mixture of digestive secretions, food-derived material, microbes, and waste creates a biologically active setting for drug-delivery research. Considering this environment allows studies to place delivery strategies in the same context as digestion, epithelial transport, and mucosal interactions. The source overview supports its relevance as a research setting, without implying that every compound behaves identically there.
Research on luminal conditions can help relate changes in digestion, microbial metabolism, epithelial transport, or mucosal defense to gastrointestinal disease processes. Rather than examining the epithelium alone, investigators can consider the contents contacting it and the biological activities occurring there. This broader view supports disease-focused studies of interactions among nutrients, microbes, secretions, and intestinal tissues.