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Using Caco-2 Cells to Study Lipid Transport by the Intestine
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A Cell Model of Human Small Intestinal Wall Based on Genetically Modified Caco-2 Cells.

A L Rusanov1, E D Luzgina2, I V Vakhrushev3

  • 1Perspektiva Company, Novosibirsk, Russia. alexander.l.rusanov@gmail.com.

Bulletin of Experimental Biology and Medicine
|November 13, 2018
PubMed
Summary

We developed a novel Caco-2 cell model to visualize the NF-κB pathway in the human small intestine. This model quantifies cellular responses to toxins, aiding in the assessment of intestinal epithelial cell damage.

Keywords:
Caco-2NF-κBfluorescent proteingenetic modification of cellsgenetically encoded sensors

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Area of Science:

  • Cell Biology
  • Toxicology
  • Gastroenterology

Background:

  • The human small intestinal wall's response to toxins is crucial for understanding gastrointestinal health.
  • Assessing the integrity and activation pathways of intestinal epithelial cells is vital for toxicology studies.

Purpose of the Study:

  • To develop and validate a genetically modified Caco-2 cell model for studying the human small intestinal wall.
  • To quantitatively assess the activation of the nuclear factor kappa B (NF-κB) pathway and related intracellular signaling.
  • To correlate cellular pathway activation with functional changes in epithelial barrier integrity.

Main Methods:

  • Utilized genetically modified Caco-2 cells to create a human small intestinal wall model.
  • Employed fluorescence microscopy for visualization and quantitative assessment of NF-κB activation.
  • Measured transepithelial electrical resistance (TEER) to assess monolayer integrity.
  • Exposed cells to tumor necrosis factor-alpha (TNFα) at varying concentrations (1-100 ng/ml).

Main Results:

  • Demonstrated a dose-dependent increase in fluorescence intensity, indicating NF-κB pathway activation in response to TNFα.
  • Observed a correlation between increased fluorescence and a decrease in transepithelial resistance.
  • The cell model successfully visualized and quantified intracellular pathway activation.

Conclusions:

  • The developed Caco-2 cell model allows for effective visualization and quantification of NF-κB activation in the human small intestinal epithelium.
  • This model provides a reliable method for assessing the toxic effects of substances on intestinal epithelial cells.
  • The correlation between NF-κB activation and barrier function decrease offers a new metric for toxicological evaluation.