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Related Experiment Video

Updated: Jul 5, 2026

Using Caco-2 Cells to Study Lipid Transport by the Intestine
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The Caco-2 cell monolayer: usefulness and limitations.

Huadong Sun1, Edwin Cy Chow, Shanjun Liu

  • 1University of Toronto, Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, Toronto, M5S 3M2, Canada +1 416 978 6164 ; +1 416 978 8511 ; ks.pang@utoronto.ca.

Expert Opinion on Drug Metabolism & Toxicology
|April 25, 2008
PubMed
Summary

The Caco-2 cell monolayer is a valuable tool for drug discovery, but its interpretation requires a deeper understanding of its complex structure. A catenary model enhances its utility for drug permeability studies.

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Area of Science:

  • Pharmacology
  • Cell Biology
  • Drug Discovery

Background:

  • Caco-2 cell monolayers are widely used for high-throughput screening of drug permeability and transporter interactions.
  • Traditionally, Caco-2 models are oversimplified as a single barrier, neglecting their complex polarized structure and metabolic enzyme presence.

Purpose of the Study:

  • To review the applications and limitations of Caco-2 cell monolayers in drug discovery.
  • To clarify misconceptions and address data interpretation challenges associated with Caco-2 models.

Main Methods:

  • A mini-review approach was employed.
  • Key applications, misconceptions, and data interpretation issues were critically examined.

Main Results:

  • The Caco-2 model's utility is often underestimated due to traditional interpretations.
  • Misconceptions regarding its barrier function and transporter roles were clarified.

Conclusions:

  • The catenary model offers a more accurate representation of the Caco-2 monolayer.
  • This enhanced model provides improved mechanistic insights and data interpretation for drug discovery studies.