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Related Concept Videos

Using Caco-2 Cells to Study Lipid Transport by the Intestine07:00

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Caco-2 cells can serve as an in vitro model to study the enterocyte transport of lipids, and lipid-soluble drugs/vitamins. The permeable membrane system separates the apical from the basolateral compartment, while the lentivirus expression system offers an effective gene overexpression method. The isolation of lipoproteins is confirmed by...
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We present a protocol to investigate the crosstalk between X-ray-irradiated Caco-2 and peripheral blood mononuclear cells (PBMC). The protocol starts with Caco-2 irradiation and set-up of the co-culture with PBMC; subsequently, trans-epithelial electrical resistance is measured regularly over 48 h and western blot performed in both Caco-2 and...
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The two-compartment model divides the body into central and peripheral compartments to account for varying blood perfusion rates among organs and tissues, affecting drug distribution. The central compartment includes blood and highly perfused tissues with rapid drug distribution, while the peripheral compartment contains tissues with slower drug distribution. After a single IV bolus dose, the drug concentration is high in plasma and low in tissues. The drug distribution between compartments...
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Three-Compartment Model Analysis with Minimal Sampling Points in the Caco-2 Permeability Assay.

Miho Nagayasu1,2, Kazuhisa Ozeki1, Satomi Onoue2

  • 1Research division, Chugai Pharmaceutical Co. Ltd.

Biological & Pharmaceutical Bulletin
|September 3, 2019
PubMed
Summary

A simplified Caco-2 permeability assay method reduces sampling frequency while maintaining accuracy. This enhanced throughput aids early-stage drug discovery by providing comparable results to conventional three-compartment model analysis.

Keywords:
Caco-2 cellmembrane permeabilitymodel analysisscreening methodtranscellular transport

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Area of Science:

  • Pharmacokinetics and Drug Metabolism
  • Computational Chemistry
  • Biopharmaceutical Sciences

Background:

  • Caco-2 permeability assays are crucial for predicting drug absorption.
  • Traditional three-compartment model analysis requires frequent sampling, limiting throughput.
  • Optimizing analytical methods is essential for efficient drug discovery.

Purpose of the Study:

  • To develop a modified three-compartment model analysis with reduced sampling frequency.
  • To assess the comparability of a simplified method against a conventional approach for Caco-2 assays.
  • To enhance the efficiency of permeability analysis in early drug discovery.

Main Methods:

  • A Caco-2 permeability assay was conducted on ten diverse compounds.
  • Concentration-time profiles were analyzed using both conventional and simplified three-compartment models.
  • Key parameters, including unbound fraction (fu2) and apparent permeability (Papp), were calculated.

Main Results:

  • The conventional method accurately described concentration-time profiles for all compounds.
  • The simplified method effectively modeled profiles for nine out of ten compounds.
  • Parameter values from the simplified method showed good agreement with the conventional method (fu2: -7 to 7%, Papp: -6 to 42%).

Conclusions:

  • The simplified three-compartment model analysis provides comparable results to the conventional method.
  • Reduced sampling frequency in the simplified method enhances analytical throughput.
  • This approach is a promising strategy for accelerating Caco-2 permeability assays in drug discovery.